forked from prometheus/prometheus
/
http.go
58 lines (49 loc) · 1.56 KB
/
http.go
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// Copyright 2015 The Prometheus 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 main
import (
"context"
"fmt"
"net/http"
"time"
"github.com/prometheus/client_golang/api"
)
const defaultTimeout = 2 * time.Minute
type httpClient interface {
do(req *http.Request) (*http.Response, []byte, error)
urlJoin(path string) string
}
type prometheusHTTPClient struct {
requestTimeout time.Duration
httpClient api.Client
}
func newPrometheusHTTPClient(serverURL string) (*prometheusHTTPClient, error) {
hc, err := api.NewClient(api.Config{
Address: serverURL,
})
if err != nil {
return nil, fmt.Errorf("error creating HTTP client: %s", err)
}
return &prometheusHTTPClient{
requestTimeout: defaultTimeout,
httpClient: hc,
}, nil
}
func (c *prometheusHTTPClient) do(req *http.Request) (*http.Response, []byte, error) {
ctx, cancel := context.WithTimeout(context.Background(), c.requestTimeout)
defer cancel()
return c.httpClient.Do(ctx, req)
}
func (c *prometheusHTTPClient) urlJoin(path string) string {
return c.httpClient.URL(path, nil).String()
}