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Callback with error if error thrown due to network #605

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merged 9 commits into from Apr 19, 2018
Merged

Callback with error if error thrown due to network #605

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171b218
Callback with error if error thrown due to network
cheedep Apr 6, 2018
126664e
remove unnecessary brackets
cheedep Apr 6, 2018
ee4addd
fix spacing
cheedep Apr 6, 2018
f2ab706
handle fetch request failure and throw error /w message 'Network error'
cheedep Apr 6, 2018
724967c
return Unknown error for anything other than Network error. Some linting
cheedep Apr 6, 2018
f5cb093
comments
cheedep Apr 7, 2018
0711c48
Merge branch 'master' into bug/cognito-js-network-errors
mlabieniec Apr 10, 2018
5579e94
Merge branch 'master' into bug/cognito-js-network-errors
mlabieniec Apr 13, 2018
26e0f08
Merge branch 'master' into bug/cognito-js-network-errors
mlabieniec Apr 19, 2018
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43 changes: 33 additions & 10 deletions packages/amazon-cognito-identity-js/src/Client.js
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Expand Up @@ -23,7 +23,7 @@ export default class Client {
const headers = {
'Content-Type': 'application/x-amz-json-1.1',
'X-Amz-Target': `AWSCognitoIdentityProviderService.${operation}`,
'X-Amz-User-Agent': this.userAgent
'X-Amz-User-Agent': this.userAgent,
};

const options = {
Expand All @@ -40,6 +40,13 @@ export default class Client {
.then(resp => {
response = resp;
return resp;
}, err => {
// If error happens here, the request failed
// if it is TypeError throw network error
if (err instanceof TypeError) {
throw new Error('Network error');
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this should probably return:
return throw new Error('Network error');

or run an } else {

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Throwing an error automatically returns control to the caller. You dont need return or a branch here.

}
throw err;
})
.then(resp => resp.json().catch(() => ({})))
.then(data => {
Expand All @@ -55,15 +62,31 @@ export default class Client {
};
return callback(error);
})
.catch(() => {
// Taken from aws-sdk-js/lib/protocol/json.js
const code = (response.headers.get('x-amzn-errortype') || 'UnknownError').split(':')[0];
const error = {
code,
name: code,
statusCode: response.status,
message: response.status.toString(),
};
.catch(err => {
// default to return 'UnknownError'
let error = { code: 'UnknownError', message: 'Unkown error' };

// first check if we have a service error
if (response && response.headers && response.headers.get('x-amzn-errortype')) {
try {
const code = (response.headers.get('x-amz-errortype')).split(':')[0];
error = {
code,
name: code,
statusCode: response.status,
message: (response.status) ? response.status.toString() : null,
};
} catch (ex) {
// pass through so it doesn't get swallowed if we can't parse it
}
// otherwise check if error is Network error
} else if (err instanceof Error && err.message === 'Network error') {
error = {
code: err.name,
name: err.name,
message: err.message,
};
}
return callback(error);
});
}
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