59 lines
1.6 KiB
Go
59 lines
1.6 KiB
Go
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// Copyright 2015 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package main
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import (
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"context"
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"fmt"
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"net/http"
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"time"
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"github.com/prometheus/client_golang/api"
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)
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const defaultTimeout = 2 * time.Minute
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type httpClient interface {
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do(req *http.Request) (*http.Response, []byte, error)
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urlJoin(path string) string
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}
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type prometheusHTTPClient struct {
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requestTimeout time.Duration
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httpClient api.Client
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}
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func newPrometheusHTTPClient(serverURL string) (*prometheusHTTPClient, error) {
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hc, err := api.NewClient(api.Config{
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Address: serverURL,
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})
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if err != nil {
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return nil, fmt.Errorf("error creating HTTP client: %s", err)
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}
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return &prometheusHTTPClient{
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requestTimeout: defaultTimeout,
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httpClient: hc,
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}, nil
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}
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func (c *prometheusHTTPClient) do(req *http.Request) (*http.Response, []byte, error) {
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ctx, cancel := context.WithTimeout(context.Background(), c.requestTimeout)
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defer cancel()
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return c.httpClient.Do(ctx, req)
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}
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func (c *prometheusHTTPClient) urlJoin(path string) string {
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return c.httpClient.URL(path, nil).String()
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}
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