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client.go
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client.go
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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package xray
import (
"context"
"encoding/json"
"fmt"
"net/http"
"net/url"
)
type xrayClient struct {
// http client for sending unsigned proxied requests to the collector
httpClient *http.Client
endpoint *url.URL
}
// newClient returns an HTTP client with proxy endpoint
func newClient(d string) *xrayClient {
endpoint := "http://" + d
endpointURL, err := url.Parse(endpoint)
if err != nil {
globalLogger.Error(err, "unable to parse endpoint from string")
}
return &xrayClient{
httpClient: &http.Client{},
endpoint: endpointURL,
}
}
// getSamplingRules calls the collector(aws proxy enabled) for sampling rules
func (p *xrayClient) getSamplingRules(ctx context.Context) (*getSamplingRulesOutput, error) {
req, err := http.NewRequestWithContext(ctx, http.MethodPost, p.endpoint.String()+"/GetSamplingRules", nil)
if err != nil {
return nil, fmt.Errorf("xray client: failed to create http request: %w", err)
}
output, err := p.httpClient.Do(req)
if err != nil {
return nil, fmt.Errorf("xray client: unable to retrieve sampling settings: %w", err)
}
defer output.Body.Close()
var samplingRulesOutput *getSamplingRulesOutput
if err := json.NewDecoder(output.Body).Decode(&samplingRulesOutput); err != nil {
return nil, fmt.Errorf("xray client: unable to unmarshal the response body: %w", err)
}
return samplingRulesOutput, nil
}