59 lines
1.6 KiB
Go
59 lines
1.6 KiB
Go
// 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()
|
|
}
|