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<a href="/aws-sdk-go-v2/docs/configuring-sdk/endpoints/" title="Configuring Client Endpoints" class="align-left pl-0 active td-sidebar-link td-sidebar-link__page" id="m-aws-sdk-go-v2docsconfiguring-sdkendpoints"><span class="td-sidebar-nav-active-item">Endpoints</span></a>
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<a href="/aws-sdk-go-v2/docs/configuring-sdk/custom-http/" title="Customizing the HTTP Client" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id="m-aws-sdk-go-v2docsconfiguring-sdkcustom-http"><span class="">HTTP Client</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id="m-aws-sdk-go-v2docsconfiguring-sdklogging-li">
<a href="/aws-sdk-go-v2/docs/configuring-sdk/logging/" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id="m-aws-sdk-go-v2docsconfiguring-sdklogging"><span class="">Logging</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id="m-aws-sdk-go-v2docsconfiguring-sdkretries-timeouts-li">
<a href="/aws-sdk-go-v2/docs/configuring-sdk/retries-timeouts/" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id="m-aws-sdk-go-v2docsconfiguring-sdkretries-timeouts"><span class="">Retries and Timeouts</span></a>
</li>
</ul>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id="m-aws-sdk-go-v2docsmigrating-li">
<a href="/aws-sdk-go-v2/docs/migrating/" title="Migrating to the AWS SDK for Go V2" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docsmigrating"><span class="">Migrating</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id="m-aws-sdk-go-v2docsmaking-requests-li">
<a href="/aws-sdk-go-v2/docs/making-requests/" title="Using the AWS SDK for Go V2 with AWS Services" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id="m-aws-sdk-go-v2docsmaking-requests"><span class="">Using AWS Services</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id="m-aws-sdk-go-v2docshandling-errors-li">
<a href="/aws-sdk-go-v2/docs/handling-errors/" title="Handling Errors in the AWS SDK for Go V2" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id="m-aws-sdk-go-v2docshandling-errors"><span class="">Handling Errors</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id="m-aws-sdk-go-v2docssdk-utilities-li">
<a href="/aws-sdk-go-v2/docs/sdk-utilities/" title="Using the AWS SDK for Go V2 Utilities" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docssdk-utilities"><span class="">SDK Utilities</span></a>
<ul class="ul-2 foldable">
<li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docssdk-utilitiesrds-li">
<a href="/aws-sdk-go-v2/docs/sdk-utilities/rds/" title="Amazon RDS Utilities" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id="m-aws-sdk-go-v2docssdk-utilitiesrds"><span class="">Amazon RDS</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docssdk-utilitiescloudfront-li">
<a href="/aws-sdk-go-v2/docs/sdk-utilities/cloudfront/" title="Amazon CloudFront Utilities" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id="m-aws-sdk-go-v2docssdk-utilitiescloudfront"><span class="">Amazon CloudFront</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docssdk-utilitiesec2-imds-li">
<a href="/aws-sdk-go-v2/docs/sdk-utilities/ec2-imds/" title="Amazon EC2 Instance Metadata Service" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id="m-aws-sdk-go-v2docssdk-utilitiesec2-imds"><span class="">Amazon EC2 IMDS</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docssdk-utilitiess3-li">
<a href="/aws-sdk-go-v2/docs/sdk-utilities/s3/" title="Amazon S3 Utilities" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id="m-aws-sdk-go-v2docssdk-utilitiess3"><span class="">Amazon S3</span></a>
</li>
</ul>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id="m-aws-sdk-go-v2docsmiddleware-li">
<a href="/aws-sdk-go-v2/docs/middleware/" title="Customizing the AWS SDK for Go V2 Client Requests" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id="m-aws-sdk-go-v2docsmiddleware"><span class="">Middleware</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id="m-aws-sdk-go-v2docsfaq-li">
<a href="/aws-sdk-go-v2/docs/faq/" title="Frequently Asked Questions" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docsfaq"><span class="">FAQ / Troubleshooting</span></a>
<ul class="ul-2 foldable">
<li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docsfaqtiming-operations-li">
<a href="/aws-sdk-go-v2/docs/faq/timing-operations/" title="Timing SDK operations" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id="m-aws-sdk-go-v2docsfaqtiming-operations"><span class="">Timing Operations</span></a>
</li>
</ul>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id="m-aws-sdk-go-v2docsunit-testing-li">
<a href="/aws-sdk-go-v2/docs/unit-testing/" title="Unit Testing with the AWS SDK for Go V2" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id="m-aws-sdk-go-v2docsunit-testing"><span class="">Testing</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id="m-aws-sdk-go-v2docscloud9-go-li">
<a href="/aws-sdk-go-v2/docs/cloud9-go/" title="Using AWS Cloud9 with the AWS SDK for Go V2" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id="m-aws-sdk-go-v2docscloud9-go"><span class="">Using Cloud9 with the SDK</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id="m-aws-sdk-go-v2docssecurity-li">
<a href="/aws-sdk-go-v2/docs/security/" title="Security for this AWS Product or Service" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docssecurity"><span class="">Security</span></a>
<ul class="ul-2 foldable">
<li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docssecuritycompliance-validation-li">
<a href="/aws-sdk-go-v2/docs/security/compliance-validation/" title="Compliance Validation for this AWS Product or Service" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id="m-aws-sdk-go-v2docssecuritycompliance-validation"><span class="">Compliance Validation</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docssecurityiam-li">
<a href="/aws-sdk-go-v2/docs/security/iam/" title="Identity and Access Management for this AWS Product or Service" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id="m-aws-sdk-go-v2docssecurityiam"><span class="">Identity and Access Management</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docssecurityinfrastructure-security-li">
<a href="/aws-sdk-go-v2/docs/security/infrastructure-security/" title="Infrastructure Security for this AWS Product or Service" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id="m-aws-sdk-go-v2docssecurityinfrastructure-security"><span class="">Infrastructure Security</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docssecuritydisaster-recovery-resiliency-li">
<a href="/aws-sdk-go-v2/docs/security/disaster-recovery-resiliency/" title="Resilience for this AWS Product or Service" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id="m-aws-sdk-go-v2docssecuritydisaster-recovery-resiliency"><span class="">Resilience</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docssecuritydata-protection-li">
<a href="/aws-sdk-go-v2/docs/security/data-protection/" title="Data Protection in this AWS Product or Service" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id="m-aws-sdk-go-v2docssecuritydata-protection"><span class="">Data Protection</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docssecuritytls-li">
<a href="/aws-sdk-go-v2/docs/security/tls/" title="TLS Version in AWS SDK for Go V2" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id="m-aws-sdk-go-v2docssecuritytls"><span class="">TLS Version</span></a>
</li>
</ul>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id="m-aws-sdk-go-v2docscode-examples-li">
<a href="/aws-sdk-go-v2/docs/code-examples/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examples"><span class="">Code Examples</span></a>
<ul class="ul-2 foldable">
<li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id="m-aws-sdk-go-v2docscode-examplescloudwatch-li">
<a href="/aws-sdk-go-v2/docs/code-examples/cloudwatch/" title="Amazon CloudWatch Examples" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplescloudwatch"><span class="">Amazon CloudWatch</span></a>
<ul class="ul-3 foldable">
<li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplescloudwatchcreatecustommetric-li">
<a href="/aws-sdk-go-v2/docs/code-examples/cloudwatch/createcustommetric/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplescloudwatchcreatecustommetric"><span class="">CreateCustomMetricv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplescloudwatchcreateenablemetricalarm-li">
<a href="/aws-sdk-go-v2/docs/code-examples/cloudwatch/createenablemetricalarm/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplescloudwatchcreateenablemetricalarm"><span class="">CreateEnableMetricAlarmv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplescloudwatchdescribealarms-li">
<a href="/aws-sdk-go-v2/docs/code-examples/cloudwatch/describealarms/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplescloudwatchdescribealarms"><span class="">DescribeAlarmsv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplescloudwatchdisablealarm-li">
<a href="/aws-sdk-go-v2/docs/code-examples/cloudwatch/disablealarm/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplescloudwatchdisablealarm"><span class="">DisableAlarmv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplescloudwatchlistmetrics-li">
<a href="/aws-sdk-go-v2/docs/code-examples/cloudwatch/listmetrics/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplescloudwatchlistmetrics"><span class="">ListMetricsv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplescloudwatchputevent-li">
<a href="/aws-sdk-go-v2/docs/code-examples/cloudwatch/putevent/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplescloudwatchputevent"><span class="">PutEventv2</span></a>
</li>
</ul>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id="m-aws-sdk-go-v2docscode-examplesdynamodb-li">
<a href="/aws-sdk-go-v2/docs/code-examples/dynamodb/" title="Amazon DynamoDB Examples" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplesdynamodb"><span class="">Amazon DynamoDB</span></a>
<ul class="ul-3 foldable">
<li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplesdynamodbdescribetable-li">
<a href="/aws-sdk-go-v2/docs/code-examples/dynamodb/describetable/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplesdynamodbdescribetable"><span class="">DescribeTablev2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplesdynamodbscanitems-li">
<a href="/aws-sdk-go-v2/docs/code-examples/dynamodb/scanitems/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplesdynamodbscanitems"><span class="">ScanItemsv2</span></a>
</li>
</ul>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id="m-aws-sdk-go-v2docscode-examplesec2-li">
<a href="/aws-sdk-go-v2/docs/code-examples/ec2/" title="Amazon EC2 Examples" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplesec2"><span class="">Amazon EC2</span></a>
<ul class="ul-3 foldable">
<li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplesec2createimage-li">
<a href="/aws-sdk-go-v2/docs/code-examples/ec2/createimage/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplesec2createimage"><span class="">CreateImagev2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplesec2createinstance-li">
<a href="/aws-sdk-go-v2/docs/code-examples/ec2/createinstance/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplesec2createinstance"><span class="">CreateInstancev2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplesec2describeinstances-li">
<a href="/aws-sdk-go-v2/docs/code-examples/ec2/describeinstances/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplesec2describeinstances"><span class="">DescribeInstancesv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplesec2describevpcendpoints-li">
<a href="/aws-sdk-go-v2/docs/code-examples/ec2/describevpcendpoints/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplesec2describevpcendpoints"><span class="">DescribeVpcEndpointsv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplesec2monitorinstances-li">
<a href="/aws-sdk-go-v2/docs/code-examples/ec2/monitorinstances/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplesec2monitorinstances"><span class="">MonitorInstancesv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplesec2rebootinstances-li">
<a href="/aws-sdk-go-v2/docs/code-examples/ec2/rebootinstances/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplesec2rebootinstances"><span class="">RebootInstancesv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplesec2startinstances-li">
<a href="/aws-sdk-go-v2/docs/code-examples/ec2/startinstances/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplesec2startinstances"><span class="">StartInstancesv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplesec2stopinstances-li">
<a href="/aws-sdk-go-v2/docs/code-examples/ec2/stopinstances/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplesec2stopinstances"><span class="">StopInstancesv2</span></a>
</li>
</ul>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id="m-aws-sdk-go-v2docscode-exampless3-li">
<a href="/aws-sdk-go-v2/docs/code-examples/s3/" title="Amazon S3 Examples" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-exampless3"><span class="">Amazon S3</span></a>
<ul class="ul-3 foldable">
<li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-exampless3copyobject-li">
<a href="/aws-sdk-go-v2/docs/code-examples/s3/copyobject/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-exampless3copyobject"><span class="">CopyObjectv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-exampless3createbucket-li">
<a href="/aws-sdk-go-v2/docs/code-examples/s3/createbucket/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-exampless3createbucket"><span class="">CreateBucketv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-exampless3deletebucket-li">
<a href="/aws-sdk-go-v2/docs/code-examples/s3/deletebucket/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-exampless3deletebucket"><span class="">DeleteBucketv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-exampless3deleteobject-li">
<a href="/aws-sdk-go-v2/docs/code-examples/s3/deleteobject/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-exampless3deleteobject"><span class="">DeleteObjectv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-exampless3generatepresignedurl-li">
<a href="/aws-sdk-go-v2/docs/code-examples/s3/generatepresignedurl/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-exampless3generatepresignedurl"><span class="">GeneratePresignedURLv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-exampless3getbucketacl-li">
<a href="/aws-sdk-go-v2/docs/code-examples/s3/getbucketacl/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-exampless3getbucketacl"><span class="">GetBucketAclv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-exampless3getobjectacl-li">
<a href="/aws-sdk-go-v2/docs/code-examples/s3/getobjectacl/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-exampless3getobjectacl"><span class="">GetObjectAclv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-exampless3listbuckets-li">
<a href="/aws-sdk-go-v2/docs/code-examples/s3/listbuckets/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-exampless3listbuckets"><span class="">ListBucketsv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-exampless3listobjects-li">
<a href="/aws-sdk-go-v2/docs/code-examples/s3/listobjects/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-exampless3listobjects"><span class="">ListObjectsv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-exampless3putobject-li">
<a href="/aws-sdk-go-v2/docs/code-examples/s3/putobject/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-exampless3putobject"><span class="">PutObjectv2</span></a>
</li>
</ul>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id="m-aws-sdk-go-v2docscode-examplessns-li">
<a href="/aws-sdk-go-v2/docs/code-examples/sns/" title="Amazon SNS Examples" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplessns"><span class="">Amazon SNS</span></a>
<ul class="ul-3 foldable">
<li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplessnscreatetopic-li">
<a href="/aws-sdk-go-v2/docs/code-examples/sns/createtopic/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplessnscreatetopic"><span class="">CreateTopicv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplessnslistsubscriptions-li">
<a href="/aws-sdk-go-v2/docs/code-examples/sns/listsubscriptions/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplessnslistsubscriptions"><span class="">ListSubscriptionsv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplessnslisttopics-li">
<a href="/aws-sdk-go-v2/docs/code-examples/sns/listtopics/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplessnslisttopics"><span class="">ListTopicsv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplessnspublish-li">
<a href="/aws-sdk-go-v2/docs/code-examples/sns/publish/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplessnspublish"><span class="">Publishv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplessnssubscribe-li">
<a href="/aws-sdk-go-v2/docs/code-examples/sns/subscribe/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplessnssubscribe"><span class="">Subscribev2</span></a>
</li>
</ul>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id="m-aws-sdk-go-v2docscode-examplessqs-li">
<a href="/aws-sdk-go-v2/docs/code-examples/sqs/" title="Amazon SQS Examples" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplessqs"><span class="">Amazon SQS</span></a>
<ul class="ul-3 foldable">
<li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplessqschangemsgvisibility-li">
<a href="/aws-sdk-go-v2/docs/code-examples/sqs/changemsgvisibility/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplessqschangemsgvisibility"><span class="">ChangeMsgVisibilityv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplessqsconfigurelpqueue-li">
<a href="/aws-sdk-go-v2/docs/code-examples/sqs/configurelpqueue/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplessqsconfigurelpqueue"><span class="">ConfigureLPQueuev2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplessqscreatelpqueue-li">
<a href="/aws-sdk-go-v2/docs/code-examples/sqs/createlpqueue/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplessqscreatelpqueue"><span class="">CreateLPQueuev2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplessqscreatequeue-li">
<a href="/aws-sdk-go-v2/docs/code-examples/sqs/createqueue/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplessqscreatequeue"><span class="">CreateQueuev2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplessqsdeadletterqueue-li">
<a href="/aws-sdk-go-v2/docs/code-examples/sqs/deadletterqueue/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplessqsdeadletterqueue"><span class="">DeadLetterQueuev2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplessqsdeletemessage-li">
<a href="/aws-sdk-go-v2/docs/code-examples/sqs/deletemessage/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplessqsdeletemessage"><span class="">DeleteMessagev2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplessqsdeletequeue-li">
<a href="/aws-sdk-go-v2/docs/code-examples/sqs/deletequeue/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplessqsdeletequeue"><span class="">DeleteQueuev2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplessqsgetqueueurl-li">
<a href="/aws-sdk-go-v2/docs/code-examples/sqs/getqueueurl/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplessqsgetqueueurl"><span class="">GetQueueURLv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplessqslistqueues-li">
<a href="/aws-sdk-go-v2/docs/code-examples/sqs/listqueues/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplessqslistqueues"><span class="">ListQueuesv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplessqsreceivelpmessage-li">
<a href="/aws-sdk-go-v2/docs/code-examples/sqs/receivelpmessage/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplessqsreceivelpmessage"><span class="">ReceiveLPMessagev2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplessqsreceivemessage-li">
<a href="/aws-sdk-go-v2/docs/code-examples/sqs/receivemessage/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplessqsreceivemessage"><span class="">ReceiveMessagev2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplessqssendmessage-li">
<a href="/aws-sdk-go-v2/docs/code-examples/sqs/sendmessage/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplessqssendmessage"><span class="">SendMessagev2</span></a>
</li>
</ul>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id="m-aws-sdk-go-v2docscode-exampleskms-li">
<a href="/aws-sdk-go-v2/docs/code-examples/kms/" title="AWS KMS Examples" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-exampleskms"><span class="">AWS KMS</span></a>
<ul class="ul-3 foldable">
<li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-exampleskmscreatekey-li">
<a href="/aws-sdk-go-v2/docs/code-examples/kms/createkey/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-exampleskmscreatekey"><span class="">CreateKeyv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-exampleskmsdecryptdata-li">
<a href="/aws-sdk-go-v2/docs/code-examples/kms/decryptdata/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-exampleskmsdecryptdata"><span class="">DecryptDatav2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-exampleskmsencryptdata-li">
<a href="/aws-sdk-go-v2/docs/code-examples/kms/encryptdata/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-exampleskmsencryptdata"><span class="">EncryptDatav2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-exampleskmsreencryptdata-li">
<a href="/aws-sdk-go-v2/docs/code-examples/kms/reencryptdata/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-exampleskmsreencryptdata"><span class="">ReEncryptDatav2</span></a>
</li>
</ul>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id="m-aws-sdk-go-v2docscode-examplessts-li">
<a href="/aws-sdk-go-v2/docs/code-examples/sts/" title="AWS STS Examples" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplessts"><span class="">AWS STS</span></a>
<ul class="ul-3 foldable">
<li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplesstsassumerole-li">
<a href="/aws-sdk-go-v2/docs/code-examples/sts/assumerole/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplesstsassumerole"><span class="">AssumeRolev2</span></a>
</li>
</ul>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id="m-aws-sdk-go-v2docscode-examplesssm-li">
<a href="/aws-sdk-go-v2/docs/code-examples/ssm/" title="AWS Systems Manager Examples" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplesssm"><span class="">AWS Systems Manager</span></a>
<ul class="ul-3 foldable">
<li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplesssmdeleteparameter-li">
<a href="/aws-sdk-go-v2/docs/code-examples/ssm/deleteparameter/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplesssmdeleteparameter"><span class="">DeleteParameterv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplesssmgetparameter-li">
<a href="/aws-sdk-go-v2/docs/code-examples/ssm/getparameter/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplesssmgetparameter"><span class="">GetParameterv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplesssmputparameter-li">
<a href="/aws-sdk-go-v2/docs/code-examples/ssm/putparameter/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplesssmputparameter"><span class="">PutParameterv2</span></a>
</li>
</ul>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id="m-aws-sdk-go-v2docscode-examplesiam-li">
<a href="/aws-sdk-go-v2/docs/code-examples/iam/" title="IAM Examples" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplesiam"><span class="">IAM</span></a>
<ul class="ul-3 foldable">
<li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplesiamaccesskeylastused-li">
<a href="/aws-sdk-go-v2/docs/code-examples/iam/accesskeylastused/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplesiamaccesskeylastused"><span class="">AccessKeyLastUsedv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplesiamattachuserpolicy-li">
<a href="/aws-sdk-go-v2/docs/code-examples/iam/attachuserpolicy/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplesiamattachuserpolicy"><span class="">AttachUserPolicyv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplesiamcreateaccesskey-li">
<a href="/aws-sdk-go-v2/docs/code-examples/iam/createaccesskey/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplesiamcreateaccesskey"><span class="">CreateAccessKeyv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplesiamcreateaccountalias-li">
<a href="/aws-sdk-go-v2/docs/code-examples/iam/createaccountalias/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplesiamcreateaccountalias"><span class="">CreateAccountAliasv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplesiamcreatepolicy-li">
<a href="/aws-sdk-go-v2/docs/code-examples/iam/createpolicy/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplesiamcreatepolicy"><span class="">CreatePolicyv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplesiamcreateuser-li">
<a href="/aws-sdk-go-v2/docs/code-examples/iam/createuser/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplesiamcreateuser"><span class="">CreateUserv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplesiamdeleteaccesskey-li">
<a href="/aws-sdk-go-v2/docs/code-examples/iam/deleteaccesskey/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplesiamdeleteaccesskey"><span class="">DeleteAccessKeyv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplesiamdeleteaccountalias-li">
<a href="/aws-sdk-go-v2/docs/code-examples/iam/deleteaccountalias/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplesiamdeleteaccountalias"><span class="">DeleteAccountAliasv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplesiamdeleteservercert-li">
<a href="/aws-sdk-go-v2/docs/code-examples/iam/deleteservercert/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplesiamdeleteservercert"><span class="">DeleteServerCertv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplesiamdeleteuser-li">
<a href="/aws-sdk-go-v2/docs/code-examples/iam/deleteuser/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplesiamdeleteuser"><span class="">DeleteUserv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplesiamdetachuserpolicy-li">
<a href="/aws-sdk-go-v2/docs/code-examples/iam/detachuserpolicy/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplesiamdetachuserpolicy"><span class="">DetachUserPolicyv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplesiamgetpolicy-li">
<a href="/aws-sdk-go-v2/docs/code-examples/iam/getpolicy/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplesiamgetpolicy"><span class="">GetPolicyv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplesiamgetservercert-li">
<a href="/aws-sdk-go-v2/docs/code-examples/iam/getservercert/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplesiamgetservercert"><span class="">GetServerCertv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplesiamlistaccesskeys-li">
<a href="/aws-sdk-go-v2/docs/code-examples/iam/listaccesskeys/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplesiamlistaccesskeys"><span class="">ListAccessKeysv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplesiamlistaccountaliases-li">
<a href="/aws-sdk-go-v2/docs/code-examples/iam/listaccountaliases/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplesiamlistaccountaliases"><span class="">ListAccountAliasesv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplesiamlistadmins-li">
<a href="/aws-sdk-go-v2/docs/code-examples/iam/listadmins/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplesiamlistadmins"><span class="">ListAdminsv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplesiamlistservercerts-li">
<a href="/aws-sdk-go-v2/docs/code-examples/iam/listservercerts/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplesiamlistservercerts"><span class="">ListServerCertsv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplesiamlistusers-li">
<a href="/aws-sdk-go-v2/docs/code-examples/iam/listusers/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplesiamlistusers"><span class="">ListUsersv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplesiamupdateaccesskey-li">
<a href="/aws-sdk-go-v2/docs/code-examples/iam/updateaccesskey/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplesiamupdateaccesskey"><span class="">UpdateAccessKeyv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplesiamupdateservercert-li">
<a href="/aws-sdk-go-v2/docs/code-examples/iam/updateservercert/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplesiamupdateservercert"><span class="">UpdateServerCertv2</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id="m-aws-sdk-go-v2docscode-examplesiamupdateuser-li">
<a href="/aws-sdk-go-v2/docs/code-examples/iam/updateuser/" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id="m-aws-sdk-go-v2docscode-examplesiamupdateuser"><span class="">UpdateUserv2</span></a>
</li>
</ul>
</li>
</ul>
</li>
</ul>
</li>
</ul>
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<div class="td-toc"><nav id="TableOfContents">
<ul>
<li>
<ul>
<li><a href="#customization">Customization</a></li>
<li><a href="#v2-endpointresolverv2--baseendpoint">V2: <code>EndpointResolverV2</code> + <code>BaseEndpoint</code></a>
<ul>
<li><a href="#endpointresolverv2-parameters"><code>EndpointResolverV2</code> parameters</a></li>
<li><a href="#a-note-about-amazon-s3">A note about Amazon S3</a></li>
<li><a href="#examples">Examples</a></li>
</ul>
</li>
<li><a href="#v1-endpointresolver">V1: <code>EndpointResolver</code></a>
<ul>
<li><a href="#examples-1">Examples</a></li>
<li><a href="#immutable-endpoints">Immutable endpoints</a></li>
</ul>
</li>
<li><a href="#migration">Migration</a>
<ul>
<li><a href="#examples-2">Examples</a></li>
</ul>
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<h1>Configuring Client Endpoints</h1>
<div class="lead">Customizing service client endpoints.</div>
<header class="article-meta">
</header>
<div class="pageinfo pageinfo-warning">
<p>Endpoint resolution is an advanced SDK topic. By changing these settings
you risk breaking your code. The default settings should be applicable to
most users in production environments.</p>
</div>
<p>The AWS SDK for Go V2 provides the ability to configure a custom
endpoint to be used for a service. In most cases, the default
configuration will suffice. Configuring custom endpoints allows for
additional behavior, such as working with pre-release versions of a
service.</p>
<h2 id="customization">Customization</h2>
<p>There are two “versions” of endpoint resolution config within the SDK.</p>
<ul>
<li>v2, released in Q3 of 2023, configured via:
<ul>
<li><code>EndpointResolverV2</code></li>
<li><code>BaseEndpoint</code></li>
</ul>
</li>
<li>v1, released alongside the SDK, configured via:
<ul>
<li><code>EndpointResolver</code></li>
</ul>
</li>
</ul>
<p>We recommend users of v1 endpoint resolution migrate to v2 to obtain access to
newer endpoint-related service features.</p>
<h2 id="v2-endpointresolverv2--baseendpoint">V2: <code>EndpointResolverV2</code> + <code>BaseEndpoint</code></h2>
<p>In resolution v2, <code>EndpointResolverV2</code> is the definitive mechanism through
which endpoint resolution occurs. The resolver’s <code>ResolveEndpoint</code> method is
invoked as part of the workflow for every request you make in the SDK. The
hostname of the <code>Endpoint</code> returned by the resolver is used <strong>as-is</strong> when
making the request (operation serializers can still append to the HTTP path,
however).</p>
<p>Resolution v2 includes an additional client-level config, <code>BaseEndpoint</code>, which
is used to specify a “base” hostname for the instance of your service. The
value set here is not definitive– it is ultimately passed as a parameter to
the client’s <code>EndpointResolverV2</code> when final resolution occurs (read on for
more information about <code>EndpointResolverV2</code> parameters). The resolver
implementation then has the opportunity to inspect and potentially modify that
value to determine the final endpoint.</p>
<p>For example, if you perform an S3 <code>GetObject</code> request against a given bucket
with a client where you’ve specified a <code>BaseEndpoint</code>, the default resolver
will inject the bucket into the hostname if it is virtual-host compatible
(assuming you haven’t disabled virtual-hosting in client config).</p>
<p>In practice, <code>BaseEndpoint</code> will most likely be used to point your client at a
development or preview instance of a service.</p>
<h3 id="endpointresolverv2-parameters"><code>EndpointResolverV2</code> parameters</h3>
<p>Each service takes a specific set of inputs which are passed to its resolution
function, defined in each service package as <code>EndpointParameters</code>.</p>
<p>Every service includes the following base parameters, which are used to
facilitate general endpoint resolution within AWS:</p>
<table>
<thead>
<tr>
<th>name</th>
<th>type</th>
<th>description</th>
</tr>
</thead>
<tbody>
<tr>
<td><code>Region</code></td>
<td><code>string</code></td>
<td>The client’s AWS region</td>
</tr>
<tr>
<td><code>Endpoint</code></td>
<td><code>string</code></td>
<td>The value set for <code>BaseEndpoint</code> in client config</td>
</tr>
<tr>
<td><code>UseFips</code></td>
<td><code>bool</code></td>
<td>Whether FIPS endpoints are enabled in client config</td>
</tr>
<tr>
<td><code>UseDualStack</code></td>
<td><code>bool</code></td>
<td>Whether dual-stack endpoints are enabled in client config</td>
</tr>
</tbody>
</table>
<p>Services can specify additional parameters required for resolution. For
example, S3’s <code>EndpointParameters</code> include the bucket name, as well as several
S3-specific feature settings such as whether virtual host addressing is
enabled.</p>
<p>If you are implementing your own <code>EndpointResolverV2</code>, you should never need to
construct your own instance of <code>EndpointParameters</code>. The SDK will source the
values per-request and pass them to your implementation.</p>
<h3 id="a-note-about-amazon-s3">A note about Amazon S3</h3>
<p>Amazon S3 is a complex service with many of its features modeled through
complex endpoint customizations, such as bucket virtual hosting, S3 MRAP, and
more.</p>
<p>Because of this, we recommend that you don’t replace the <code>EndpointResolverV2</code>
implementation in your S3 client. If you need to extend its resolution
behavior, perhaps by sending requests to a local development stack with
additional endpoint considerations, we recommend wrapping the default
implementation such that it delegates back to the default as a fallback (shown
in examples below).</p>
<h3 id="examples">Examples</h3>
<h4 id="with-baseendpoint">With <code>BaseEndpoint</code></h4>
<p>The following code snippet shows how to point your S3 client at a local
instance of a service, which in this example is hosted on the loopback device
at port 8080.</p>
<div class="highlight"><pre tabindex="0" style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-go" data-lang="go"><span style="display:flex;"><span><span style="color:#000">client</span> <span style="color:#ce5c00;font-weight:bold">:=</span> <span style="color:#000">s3</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">NewFromConfig</span><span style="color:#000;font-weight:bold">(</span><span style="color:#000">cfg</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#204a87;font-weight:bold">func</span> <span style="color:#000;font-weight:bold">(</span><span style="color:#000">o</span> <span style="color:#ce5c00;font-weight:bold">*</span><span style="color:#000">svc</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">Options</span><span style="color:#000;font-weight:bold">)</span> <span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">o</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">BaseEndpoint</span> <span style="color:#000;font-weight:bold">=</span> <span style="color:#000">aws</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">String</span><span style="color:#000;font-weight:bold">(</span><span style="color:#4e9a06">"https://localhost:8080/"</span><span style="color:#000;font-weight:bold">)</span>
</span></span><span style="display:flex;"><span><span style="color:#000;font-weight:bold">})</span>
</span></span></code></pre></div><h4 id="with-endpointresolverv2">With <code>EndpointResolverV2</code></h4>
<p>The following code snippet shows how to inject custom behavior into S3’s
endpoint resolution using <code>EndpointResolverV2</code>.</p>
<div class="highlight"><pre tabindex="0" style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-go" data-lang="go"><span style="display:flex;"><span><span style="color:#204a87;font-weight:bold">import</span> <span style="color:#000;font-weight:bold">(</span>
</span></span><span style="display:flex;"><span> <span style="color:#4e9a06">"context"</span>
</span></span><span style="display:flex;"><span> <span style="color:#4e9a06">"net/url"</span>
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span> <span style="color:#4e9a06">"github.com/aws/aws-sdk-go-v2/service/s3"</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">smithyendpoints</span> <span style="color:#4e9a06">"github.com/aws/smithy-go/endpoints"</span>
</span></span><span style="display:flex;"><span><span style="color:#000;font-weight:bold">)</span>
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span><span style="color:#204a87;font-weight:bold">type</span> <span style="color:#000">resolverV2</span> <span style="color:#204a87;font-weight:bold">struct</span> <span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#8f5902;font-style:italic">// you could inject additional application context here as well
</span></span></span><span style="display:flex;"><span><span style="color:#8f5902;font-style:italic"></span><span style="color:#000;font-weight:bold">}</span>
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span><span style="color:#204a87;font-weight:bold">func</span> <span style="color:#000;font-weight:bold">(</span><span style="color:#ce5c00;font-weight:bold">*</span><span style="color:#000">resolverV2</span><span style="color:#000;font-weight:bold">)</span> <span style="color:#000">ResolveEndpoint</span><span style="color:#000;font-weight:bold">(</span><span style="color:#000">ctx</span> <span style="color:#000">context</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">Context</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#000">params</span> <span style="color:#000">s3</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">EndpointParameters</span><span style="color:#000;font-weight:bold">)</span> <span style="color:#000;font-weight:bold">(</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">smithyendpoints</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">Endpoint</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#204a87;font-weight:bold">error</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">)</span> <span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">if</span> <span style="color:#8f5902;font-style:italic">/* input params or caller context indicate we must route somewhere */</span> <span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">u</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#000">err</span> <span style="color:#ce5c00;font-weight:bold">:=</span> <span style="color:#000">url</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">Parse</span><span style="color:#000;font-weight:bold">(</span><span style="color:#4e9a06">"https://custom.service.endpoint/"</span><span style="color:#000;font-weight:bold">)</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">if</span> <span style="color:#000">err</span> <span style="color:#ce5c00;font-weight:bold">!=</span> <span style="color:#204a87;font-weight:bold">nil</span> <span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">return</span> <span style="color:#000">smithyendpoints</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">Endpoint</span><span style="color:#000;font-weight:bold">{},</span> <span style="color:#000">err</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">}</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">return</span> <span style="color:#000">smithyendpoints</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">Endpoint</span><span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">URI</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#ce5c00;font-weight:bold">*</span><span style="color:#000">u</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">},</span> <span style="color:#204a87;font-weight:bold">nil</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">}</span>
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span> <span style="color:#8f5902;font-style:italic">// delegate back to the default v2 resolver otherwise
</span></span></span><span style="display:flex;"><span><span style="color:#8f5902;font-style:italic"></span> <span style="color:#204a87;font-weight:bold">return</span> <span style="color:#000">s3</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">NewDefaultEndpointResolverV2</span><span style="color:#000;font-weight:bold">().</span><span style="color:#000">ResolveEndpoint</span><span style="color:#000;font-weight:bold">(</span><span style="color:#000">ctx</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#000">params</span><span style="color:#000;font-weight:bold">)</span>
</span></span><span style="display:flex;"><span><span style="color:#000;font-weight:bold">}</span>
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span><span style="color:#204a87;font-weight:bold">func</span> <span style="color:#000">main</span><span style="color:#000;font-weight:bold">()</span> <span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#8f5902;font-style:italic">// load config...
</span></span></span><span style="display:flex;"><span><span style="color:#8f5902;font-style:italic"></span>
</span></span><span style="display:flex;"><span> <span style="color:#000">client</span> <span style="color:#ce5c00;font-weight:bold">:=</span> <span style="color:#000">s3</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">NewFromConfig</span><span style="color:#000;font-weight:bold">(</span><span style="color:#000">cfg</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#204a87;font-weight:bold">func</span> <span style="color:#000;font-weight:bold">(</span><span style="color:#000">o</span> <span style="color:#ce5c00;font-weight:bold">*</span><span style="color:#000">s3</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">Options</span><span style="color:#000;font-weight:bold">)</span> <span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">o</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">EndpointResolverV2</span> <span style="color:#000;font-weight:bold">=</span> <span style="color:#ce5c00;font-weight:bold">&</span><span style="color:#000">resolverV2</span><span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#8f5902;font-style:italic">// ...
</span></span></span><span style="display:flex;"><span><span style="color:#8f5902;font-style:italic"></span> <span style="color:#000;font-weight:bold">}</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">})</span>
</span></span><span style="display:flex;"><span><span style="color:#000;font-weight:bold">}</span>
</span></span></code></pre></div><h4 id="with-both">With both</h4>
<p>The following sample program demonstrates the interaction between
<code>BaseEndpoint</code> and <code>EndpointResolverV2</code>. <strong>This is an advanced use case:</strong></p>
<div class="highlight"><pre tabindex="0" style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-kotlin" data-lang="kotlin"><span style="display:flex;"><span><span style="color:#204a87;font-weight:bold">import</span> <span style="color:#000">(</span>
</span></span><span style="display:flex;"><span> <span style="color:#4e9a06">"context"</span>
</span></span><span style="display:flex;"><span> <span style="color:#4e9a06">"fmt"</span>
</span></span><span style="display:flex;"><span> <span style="color:#4e9a06">"log"</span>
</span></span><span style="display:flex;"><span> <span style="color:#4e9a06">"net/url"</span>
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span> <span style="color:#4e9a06">"github.com/aws/aws-sdk-go-v2"</span>
</span></span><span style="display:flex;"><span> <span style="color:#4e9a06">"github.com/aws/aws-sdk-go-v2/config"</span>
</span></span><span style="display:flex;"><span> <span style="color:#4e9a06">"github.com/aws/aws-sdk-go-v2/service/s3"</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">smithyendpoints</span> <span style="color:#4e9a06">"github.com/aws/smithy-go/endpoints"</span>
</span></span><span style="display:flex;"><span><span style="color:#000;font-weight:bold">)</span>
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span><span style="color:#000">type</span> <span style="color:#000">resolverV2</span> <span style="color:#000">struct</span> <span style="color:#000;font-weight:bold">{}</span>
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span><span style="color:#000">func</span> <span style="color:#000;font-weight:bold">(*</span><span style="color:#000">resolverV2</span><span style="color:#000;font-weight:bold">)</span> <span style="color:#000">ResolveEndpoint</span><span style="color:#000;font-weight:bold">(</span><span style="color:#000">ctx</span> <span style="color:#000">context</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">Context</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#000">params</span> <span style="color:#000">s3</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">EndpointParameters</span><span style="color:#000;font-weight:bold">)</span> <span style="color:#000;font-weight:bold">(</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">smithyendpoints</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">Endpoint</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#000">error</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">)</span> <span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#8f5902;font-style:italic">// s3.Options.BaseEndpoint is accessible here:
</span></span></span><span style="display:flex;"><span><span style="color:#8f5902;font-style:italic"></span> <span style="color:#000">fmt</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">Printf</span><span style="color:#000;font-weight:bold">(</span><span style="color:#4e9a06">"The endpoint provided in config is %s</span><span style="color:#4e9a06">\n</span><span style="color:#4e9a06">"</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#000;font-weight:bold">*</span><span style="color:#000">params</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">Endpoint</span><span style="color:#000;font-weight:bold">)</span>
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span> <span style="color:#8f5902;font-style:italic">// fallback to default
</span></span></span><span style="display:flex;"><span><span style="color:#8f5902;font-style:italic"></span> <span style="color:#204a87;font-weight:bold">return</span> <span style="color:#000">s3</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">NewDefaultEndpointResolverV2</span><span style="color:#000;font-weight:bold">().</span><span style="color:#000">ResolveEndpoint</span><span style="color:#000;font-weight:bold">(</span><span style="color:#000">ctx</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#000">params</span><span style="color:#000;font-weight:bold">)</span>
</span></span><span style="display:flex;"><span><span style="color:#000;font-weight:bold">}</span>
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span><span style="color:#000">func</span> <span style="color:#000">main</span><span style="color:#000;font-weight:bold">()</span> <span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">cfg</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#000">err</span> <span style="color:#000;font-weight:bold">:=</span> <span style="color:#000">config</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">LoadDefaultConfig</span><span style="color:#000;font-weight:bold">(</span><span style="color:#000">context</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">Background</span><span style="color:#000;font-weight:bold">()</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">if</span> <span style="color:#000;font-weight:bold">(</span><span style="color:#000">err</span> <span style="color:#ce5c00;font-weight:bold">!=</span> <span style="color:#000">nil</span><span style="color:#000;font-weight:bold">)</span> <span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">log</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">Fatal</span><span style="color:#000;font-weight:bold">(</span><span style="color:#000">err</span><span style="color:#000;font-weight:bold">)</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">}</span>
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span> <span style="color:#000">client</span> <span style="color:#000;font-weight:bold">:=</span> <span style="color:#000">s3</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">NewFromConfig</span><span style="color:#000;font-weight:bold">(</span><span style="color:#000">cfg</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#000">func</span> <span style="color:#000;font-weight:bold">(</span><span style="color:#000">o</span> <span style="color:#000;font-weight:bold">*</span><span style="color:#000">s3</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">Options</span><span style="color:#000;font-weight:bold">)</span> <span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">o</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">BaseEndpoint</span> <span style="color:#000;font-weight:bold">=</span> <span style="color:#000">aws</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">String</span><span style="color:#000;font-weight:bold">(</span><span style="color:#4e9a06">"https://endpoint.dev/"</span><span style="color:#000;font-weight:bold">)</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">o</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">EndpointResolverV2</span> <span style="color:#000;font-weight:bold">=</span> <span style="color:#000;font-weight:bold">&</span><span style="color:#000">resolverV2</span><span style="color:#000;font-weight:bold">{}</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">})</span>
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span> <span style="color:#8f5902;font-style:italic">// ignore the output, this is just for demonstration
</span></span></span><span style="display:flex;"><span><span style="color:#8f5902;font-style:italic"></span> <span style="color:#000">client</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">ListBuckets</span><span style="color:#000;font-weight:bold">(</span><span style="color:#000">context</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">Background</span><span style="color:#000;font-weight:bold">(),</span> <span style="color:#000">nil</span><span style="color:#000;font-weight:bold">)</span>
</span></span><span style="display:flex;"><span><span style="color:#000;font-weight:bold">}</span>
</span></span></code></pre></div><p>When run, the above program outputs the following:</p>
<pre tabindex="0"><code>The endpoint provided in config is https://endpoint.dev/
</code></pre><h2 id="v1-endpointresolver">V1: <code>EndpointResolver</code></h2>
<div class="pageinfo pageinfo-warning">
<p>Endpoint resolution v1 is retained for backwards compatibility and is isolated
from the modern behavior in endpoint resolution v2. It will only be used if the
<code>EndpointResolver</code> field is set by the caller.</p>
<p>Use of v1 will most likely prevent you from accessing endpoint-related service
features introduced with or after the release of v2 resolution. See “Migration”
for instructions on how to upgrade.</p>
</div>
<p>A <a href="https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/aws#EndpointResolver">EndpointResolver</a> can be configured
to provide custom endpoint resolution logic for service clients. You can use a
custom endpoint resolver to override a service’s endpoint resolution logic for
all endpoints, or a just specific regional endpoint. Custom endpoint resolver
can trigger the service’s endpoint resolution logic to fallback if a custom
resolver does not wish to resolve a requested endpoint.
<a href="https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/aws#EndpointResolverWithOptionsFunc">EndpointResolverWithOptionsFunc</a> can be used to easily wrap functions
to satisfy the <code>EndpointResolverWithOptions</code> interface.</p>
<p>A <code>EndpointResolver</code> can be easily configured by passing the resolver wrapped
with <a href="https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/config#WithEndpointResolverWithOptions">WithEndpointResolverWithOptions</a> to <a href="https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/config#LoadDefaultConfig">LoadDefaultConfig</a>, allowing for the ability to override endpoints
when loading credentials, as well as configuring the resulting <code>aws.Config</code>
with your custom endpoint resolver.</p>
<p>The endpoint resolver is given the service and region as a string, allowing for
the resolver to dynamically drive its behavior. Each service client package has
an exported <code>ServiceID</code> constant which can be used to determine which service
client is invoking your endpoint resolver.</p>
<p>An endpoint resolver can use the <a href="https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/aws#EndpointNotFoundError">EndpointNotFoundError</a> sentinel error value to trigger fallback
resolution to the service clients default resolution logic. This allows you to
selectively override one or more endpoints seamlessly without having to handle
fallback logic.</p>
<p>If your endpoint resolver implementation returns an error other than
<code>EndpointNotFoundError</code>, endpoint resolution will stop and the service
operation returns an error to your application.</p>
<h3 id="examples-1">Examples</h3>
<h4 id="with-fallback">With fallback</h4>
<p>The following code snippet shows how a single service endpoint can be
overridden for DynamoDB with fallback behavior for other
endpoints:</p>
<div class="highlight"><pre tabindex="0" style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-go" data-lang="go"><span style="display:flex;"><span><span style="color:#000">customResolver</span> <span style="color:#ce5c00;font-weight:bold">:=</span> <span style="color:#000">aws</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">EndpointResolverWithOptionsFunc</span><span style="color:#000;font-weight:bold">(</span><span style="color:#204a87;font-weight:bold">func</span><span style="color:#000;font-weight:bold">(</span><span style="color:#000">service</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#000">region</span> <span style="color:#204a87;font-weight:bold">string</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#000">options</span> <span style="color:#ce5c00;font-weight:bold">...</span><span style="color:#204a87;font-weight:bold">interface</span><span style="color:#000;font-weight:bold">{})</span> <span style="color:#000;font-weight:bold">(</span><span style="color:#000">aws</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">Endpoint</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#204a87;font-weight:bold">error</span><span style="color:#000;font-weight:bold">)</span> <span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">if</span> <span style="color:#000">service</span> <span style="color:#ce5c00;font-weight:bold">==</span> <span style="color:#000">dynamodb</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">ServiceID</span> <span style="color:#ce5c00;font-weight:bold">&&</span> <span style="color:#000">region</span> <span style="color:#ce5c00;font-weight:bold">==</span> <span style="color:#4e9a06">"us-west-2"</span> <span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">return</span> <span style="color:#000">aws</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">Endpoint</span><span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">PartitionID</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#4e9a06">"aws"</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">URL</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#4e9a06">"https://test.us-west-2.amazonaws.com"</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">SigningRegion</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#4e9a06">"us-west-2"</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">},</span> <span style="color:#204a87;font-weight:bold">nil</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">}</span>
</span></span><span style="display:flex;"><span> <span style="color:#8f5902;font-style:italic">// returning EndpointNotFoundError will allow the service to fallback to it's default resolution
</span></span></span><span style="display:flex;"><span><span style="color:#8f5902;font-style:italic"></span> <span style="color:#204a87;font-weight:bold">return</span> <span style="color:#000">aws</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">Endpoint</span><span style="color:#000;font-weight:bold">{},</span> <span style="color:#ce5c00;font-weight:bold">&</span><span style="color:#000">aws</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">EndpointNotFoundError</span><span style="color:#000;font-weight:bold">{}</span>
</span></span><span style="display:flex;"><span><span style="color:#000;font-weight:bold">})</span>
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span><span style="color:#000">cfg</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#000">err</span> <span style="color:#ce5c00;font-weight:bold">:=</span> <span style="color:#000">config</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">LoadDefaultConfig</span><span style="color:#000;font-weight:bold">(</span><span style="color:#000">context</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">TODO</span><span style="color:#000;font-weight:bold">(),</span> <span style="color:#000">config</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">WithEndpointResolverWithOptions</span><span style="color:#000;font-weight:bold">(</span><span style="color:#000">customResolver</span><span style="color:#000;font-weight:bold">))</span>
</span></span></code></pre></div><h4 id="without-fallback">Without fallback</h4>
<p>The following code snippet shows how a single service endpoint can be
overridden for DynamoDB without fallback behavior for other
endpoints:</p>
<div class="highlight"><pre tabindex="0" style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-go" data-lang="go"><span style="display:flex;"><span><span style="color:#000">customResolver</span> <span style="color:#ce5c00;font-weight:bold">:=</span> <span style="color:#000">aws</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">EndpointResolverWithOptionsFunc</span><span style="color:#000;font-weight:bold">(</span><span style="color:#204a87;font-weight:bold">func</span><span style="color:#000;font-weight:bold">(</span><span style="color:#000">service</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#000">region</span> <span style="color:#204a87;font-weight:bold">string</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#000">options</span> <span style="color:#ce5c00;font-weight:bold">...</span><span style="color:#204a87;font-weight:bold">interface</span><span style="color:#000;font-weight:bold">{})</span> <span style="color:#000;font-weight:bold">(</span><span style="color:#000">aws</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">Endpoint</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#204a87;font-weight:bold">error</span><span style="color:#000;font-weight:bold">)</span> <span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">if</span> <span style="color:#000">service</span> <span style="color:#ce5c00;font-weight:bold">==</span> <span style="color:#000">dynamodb</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">ServiceID</span> <span style="color:#ce5c00;font-weight:bold">&&</span> <span style="color:#000">region</span> <span style="color:#ce5c00;font-weight:bold">==</span> <span style="color:#4e9a06">"us-west-2"</span> <span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">return</span> <span style="color:#000">aws</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">Endpoint</span><span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">PartitionID</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#4e9a06">"aws"</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">URL</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#4e9a06">"https://test.us-west-2.amazonaws.com"</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">SigningRegion</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#4e9a06">"us-west-2"</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">},</span> <span style="color:#204a87;font-weight:bold">nil</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">}</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">return</span> <span style="color:#000">aws</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">Endpoint</span><span style="color:#000;font-weight:bold">{},</span> <span style="color:#000">fmt</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">Errorf</span><span style="color:#000;font-weight:bold">(</span><span style="color:#4e9a06">"unknown endpoint requested"</span><span style="color:#000;font-weight:bold">)</span>
</span></span><span style="display:flex;"><span><span style="color:#000;font-weight:bold">})</span>
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span><span style="color:#000">cfg</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#000">err</span> <span style="color:#ce5c00;font-weight:bold">:=</span> <span style="color:#000">config</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">LoadDefaultConfig</span><span style="color:#000;font-weight:bold">(</span><span style="color:#000">context</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">TODO</span><span style="color:#000;font-weight:bold">(),</span> <span style="color:#000">config</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">WithEndpointResolverWithOptions</span><span style="color:#000;font-weight:bold">(</span><span style="color:#000">customResolver</span><span style="color:#000;font-weight:bold">))</span>
</span></span></code></pre></div><h3 id="immutable-endpoints">Immutable endpoints</h3>
<div class="pageinfo pageinfo-warning">
<p>Setting an endpoint as immutable may prevent some service client features from
functioning correctly, and could result in undefined behavior. Caution should
be taken when defining an endpoint as immutable.</p>
</div>
<p>Some service clients, such as Amazon S3, may modify the endpoint
returned by the resolver for certain service operations. For example, Amazon S3 will automatically handle <a href="https://docs.aws.amazon.com/AmazonS3/latest/dev/VirtualHosting.html">Virtual Bucket
Addressing</a>
by mutating the resolved endpoint. You can prevent the SDK from mutating your
custom endpoints by setting <a href="https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/aws#Endpoint.HostnameImmutable">HostnameImmutable</a> to <code>true</code>. For example:</p>
<div class="highlight"><pre tabindex="0" style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-go" data-lang="go"><span style="display:flex;"><span><span style="color:#000">customResolver</span> <span style="color:#ce5c00;font-weight:bold">:=</span> <span style="color:#000">aws</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">EndpointResolverWithOptionsFunc</span><span style="color:#000;font-weight:bold">(</span><span style="color:#204a87;font-weight:bold">func</span><span style="color:#000;font-weight:bold">(</span><span style="color:#000">service</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#000">region</span> <span style="color:#204a87;font-weight:bold">string</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#000">options</span> <span style="color:#ce5c00;font-weight:bold">...</span><span style="color:#204a87;font-weight:bold">interface</span><span style="color:#000;font-weight:bold">{})</span> <span style="color:#000;font-weight:bold">(</span><span style="color:#000">aws</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">Endpoint</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#204a87;font-weight:bold">error</span><span style="color:#000;font-weight:bold">)</span> <span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">if</span> <span style="color:#000">service</span> <span style="color:#ce5c00;font-weight:bold">==</span> <span style="color:#000">dynamodb</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">ServiceID</span> <span style="color:#ce5c00;font-weight:bold">&&</span> <span style="color:#000">region</span> <span style="color:#ce5c00;font-weight:bold">==</span> <span style="color:#4e9a06">"us-west-2"</span> <span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">return</span> <span style="color:#000">aws</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">Endpoint</span><span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">PartitionID</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#4e9a06">"aws"</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">URL</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#4e9a06">"https://test.us-west-2.amazonaws.com"</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">SigningRegion</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#4e9a06">"us-west-2"</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">HostnameImmutable</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#204a87;font-weight:bold">true</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">},</span> <span style="color:#204a87;font-weight:bold">nil</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">}</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">return</span> <span style="color:#000">aws</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">Endpoint</span><span style="color:#000;font-weight:bold">{},</span> <span style="color:#000">fmt</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">Errorf</span><span style="color:#000;font-weight:bold">(</span><span style="color:#4e9a06">"unknown endpoint requested"</span><span style="color:#000;font-weight:bold">)</span>
</span></span><span style="display:flex;"><span><span style="color:#000;font-weight:bold">})</span>
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span><span style="color:#000">cfg</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#000">err</span> <span style="color:#ce5c00;font-weight:bold">:=</span> <span style="color:#000">config</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">LoadDefaultConfig</span><span style="color:#000;font-weight:bold">(</span><span style="color:#000">context</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">TODO</span><span style="color:#000;font-weight:bold">(),</span> <span style="color:#000">config</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">WithEndpointResolverWithOptions</span><span style="color:#000;font-weight:bold">(</span><span style="color:#000">customResolver</span><span style="color:#000;font-weight:bold">))</span>
</span></span></code></pre></div><h2 id="migration">Migration</h2>
<p>When migrating from v1 to v2 of endpoint resolution, the following general principles apply:</p>
<ul>
<li>Returning an <a href="https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/aws#Endpoint">Endpoint</a> with <a href="https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/aws#Endpoint.HostnameImmutable">HostnameImmutable</a> set to <code>false</code> is roughly
equivalent to setting <code>BaseEndpoint</code> to the originally returned URL from v1 and
leaving <code>EndpointResolverV2</code> as the default.</li>
<li>Returning an Endpoint with HostnameImmutable set to <code>true</code> is roughly
equivalent to implementing an <code>EndpointResolverV2</code> which returns the
originally returned URL from v1.</li>
</ul>
<p>Examples for these cases are provided below.</p>
<div class="pageinfo pageinfo-warning">
<p>V1 immutable endpoints and V2 resolution are not equivalent in behavior. For
example, signing overrides for custom features like S3 Object Lambda would
still be set for immutable endpoints returned via v1 code, but the same will
not be done for v2.</p>
</div>
<h3 id="examples-2">Examples</h3>
<h4 id="mutable-endpoint">Mutable endpoint</h4>
<p>The following code sample demonstrates how to migrate a basic v1 endpoint
resolver that returns a modifiable endpoint:</p>
<div class="highlight"><pre tabindex="0" style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-go" data-lang="go"><span style="display:flex;"><span><span style="color:#8f5902;font-style:italic">// v1
</span></span></span><span style="display:flex;"><span><span style="color:#8f5902;font-style:italic"></span><span style="color:#000">client</span> <span style="color:#ce5c00;font-weight:bold">:=</span> <span style="color:#000">svc</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">NewFromConfig</span><span style="color:#000;font-weight:bold">(</span><span style="color:#000">cfg</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#204a87;font-weight:bold">func</span> <span style="color:#000;font-weight:bold">(</span><span style="color:#000">o</span> <span style="color:#ce5c00;font-weight:bold">*</span><span style="color:#000">svc</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">Options</span><span style="color:#000;font-weight:bold">)</span> <span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">o</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">EndpointResolver</span> <span style="color:#000;font-weight:bold">=</span> <span style="color:#000">svc</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">EndpointResolverFromURL</span><span style="color:#000;font-weight:bold">(</span><span style="color:#4e9a06">"https://custom.endpoint.api/"</span><span style="color:#000;font-weight:bold">)</span>
</span></span><span style="display:flex;"><span><span style="color:#000;font-weight:bold">})</span>
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span><span style="color:#8f5902;font-style:italic">// v2
</span></span></span><span style="display:flex;"><span><span style="color:#8f5902;font-style:italic"></span><span style="color:#000">client</span> <span style="color:#ce5c00;font-weight:bold">:=</span> <span style="color:#000">svc</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">NewFromConfig</span><span style="color:#000;font-weight:bold">(</span><span style="color:#000">cfg</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#204a87;font-weight:bold">func</span> <span style="color:#000;font-weight:bold">(</span><span style="color:#000">o</span> <span style="color:#ce5c00;font-weight:bold">*</span><span style="color:#000">svc</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">Options</span><span style="color:#000;font-weight:bold">)</span> <span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#8f5902;font-style:italic">// the value of BaseEndpoint is passed to the default EndpointResolverV2
</span></span></span><span style="display:flex;"><span><span style="color:#8f5902;font-style:italic"></span> <span style="color:#8f5902;font-style:italic">// implementation, which will handle routing for features such as S3 accelerate,
</span></span></span><span style="display:flex;"><span><span style="color:#8f5902;font-style:italic"></span> <span style="color:#8f5902;font-style:italic">// MRAP, etc.
</span></span></span><span style="display:flex;"><span><span style="color:#8f5902;font-style:italic"></span> <span style="color:#000">o</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">BaseEndpoint</span> <span style="color:#000;font-weight:bold">=</span> <span style="color:#000">aws</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">String</span><span style="color:#000;font-weight:bold">(</span><span style="color:#4e9a06">"https://custom.endpoint.api/"</span><span style="color:#000;font-weight:bold">)</span>
</span></span><span style="display:flex;"><span><span style="color:#000;font-weight:bold">})</span>
</span></span></code></pre></div><h4 id="immutable-endpoint">Immutable endpoint</h4>
<div class="highlight"><pre tabindex="0" style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-go" data-lang="go"><span style="display:flex;"><span><span style="color:#8f5902;font-style:italic">// v1
</span></span></span><span style="display:flex;"><span><span style="color:#8f5902;font-style:italic"></span><span style="color:#000">client</span> <span style="color:#ce5c00;font-weight:bold">:=</span> <span style="color:#000">svc</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">NewFromConfig</span><span style="color:#000;font-weight:bold">(</span><span style="color:#000">cfg</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#204a87;font-weight:bold">func</span> <span style="color:#000;font-weight:bold">(</span><span style="color:#000">o</span> <span style="color:#ce5c00;font-weight:bold">*</span><span style="color:#000">svc</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">Options</span><span style="color:#000;font-weight:bold">)</span> <span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">o</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">EndpointResolver</span> <span style="color:#000;font-weight:bold">=</span> <span style="color:#000">svc</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">EndpointResolverFromURL</span><span style="color:#000;font-weight:bold">(</span><span style="color:#4e9a06">"https://custom.endpoint.api/"</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#204a87;font-weight:bold">func</span> <span style="color:#000;font-weight:bold">(</span><span style="color:#000">e</span> <span style="color:#ce5c00;font-weight:bold">*</span><span style="color:#000">aws</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">Endpoint</span><span style="color:#000;font-weight:bold">)</span> <span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">e</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">HostnameImmutable</span> <span style="color:#000;font-weight:bold">=</span> <span style="color:#204a87;font-weight:bold">true</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">})</span>
</span></span><span style="display:flex;"><span><span style="color:#000;font-weight:bold">})</span>
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span><span style="color:#8f5902;font-style:italic">// v2
</span></span></span><span style="display:flex;"><span><span style="color:#8f5902;font-style:italic"></span><span style="color:#204a87;font-weight:bold">import</span> <span style="color:#000;font-weight:bold">(</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">smithyendpoints</span> <span style="color:#4e9a06">"github.com/aws/smithy-go/endpoints"</span>
</span></span><span style="display:flex;"><span><span style="color:#000;font-weight:bold">)</span>
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span><span style="color:#204a87;font-weight:bold">type</span> <span style="color:#000">staticResolver</span> <span style="color:#204a87;font-weight:bold">struct</span> <span style="color:#000;font-weight:bold">{}</span>
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span><span style="color:#204a87;font-weight:bold">func</span> <span style="color:#000;font-weight:bold">(</span><span style="color:#ce5c00;font-weight:bold">*</span><span style="color:#000">staticResolver</span><span style="color:#000;font-weight:bold">)</span> <span style="color:#000">ResolveEndpoint</span><span style="color:#000;font-weight:bold">(</span><span style="color:#000">ctx</span> <span style="color:#000">context</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">Context</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#000">params</span> <span style="color:#000">svc</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">EndpointParameters</span><span style="color:#000;font-weight:bold">)</span> <span style="color:#000;font-weight:bold">(</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">smithyendpoints</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">Endpoint</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#204a87;font-weight:bold">error</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">)</span> <span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#8f5902;font-style:italic">// This value will be used as-is when making the request.
</span></span></span><span style="display:flex;"><span><span style="color:#8f5902;font-style:italic"></span> <span style="color:#000">u</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#000">err</span> <span style="color:#ce5c00;font-weight:bold">:=</span> <span style="color:#000">url</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">Parse</span><span style="color:#000;font-weight:bold">(</span><span style="color:#4e9a06">"https://custom.endpoint.api/"</span><span style="color:#000;font-weight:bold">)</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">if</span> <span style="color:#000">err</span> <span style="color:#ce5c00;font-weight:bold">!=</span> <span style="color:#204a87;font-weight:bold">nil</span> <span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">return</span> <span style="color:#000">smithyendpoints</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">Endpoint</span><span style="color:#000;font-weight:bold">{},</span> <span style="color:#000">err</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">}</span>
</span></span><span style="display:flex;"><span> <span style="color:#204a87;font-weight:bold">return</span> <span style="color:#000">smithyendpoints</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">Endpoint</span><span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">URI</span><span style="color:#000;font-weight:bold">:</span> <span style="color:#ce5c00;font-weight:bold">*</span><span style="color:#000">u</span><span style="color:#000;font-weight:bold">,</span>
</span></span><span style="display:flex;"><span> <span style="color:#000;font-weight:bold">},</span> <span style="color:#204a87;font-weight:bold">nil</span>
</span></span><span style="display:flex;"><span><span style="color:#000;font-weight:bold">}</span>
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span><span style="color:#000">client</span> <span style="color:#ce5c00;font-weight:bold">:=</span> <span style="color:#000">svc</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">NewFromConfig</span><span style="color:#000;font-weight:bold">(</span><span style="color:#000">cfg</span><span style="color:#000;font-weight:bold">,</span> <span style="color:#204a87;font-weight:bold">func</span> <span style="color:#000;font-weight:bold">(</span><span style="color:#000">o</span> <span style="color:#ce5c00;font-weight:bold">*</span><span style="color:#000">svc</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">Options</span><span style="color:#000;font-weight:bold">)</span> <span style="color:#000;font-weight:bold">{</span>
</span></span><span style="display:flex;"><span> <span style="color:#000">o</span><span style="color:#000;font-weight:bold">.</span><span style="color:#000">EndpointResolverV2</span> <span style="color:#000;font-weight:bold">=</span> <span style="color:#ce5c00;font-weight:bold">&</span><span style="color:#000">staticResolver</span><span style="color:#000;font-weight:bold">{}</span>
</span></span><span style="display:flex;"><span><span style="color:#000;font-weight:bold">})</span>
</span></span></code></pre></div>
<div class="text-muted mt-5 pt-3 border-top">
Last modified October 6, 2023: <a href="https://github.com/aws/aws-sdk-go-v2/commit/52072aba6a7566a97e009a8b629707bfa9dfce75">Fix code snippets in devguide for endpointsv2 (#2301) (52072aba6a)</a>
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