github.com/m3db/m3@v1.5.0/src/cmd/tools/m3ctl/client/http.go (about)

     1  // Copyright (c) 2020 Uber Technologies, Inc.
     2  //
     3  // Permission is hereby granted, free of charge, to any person obtaining a copy
     4  // of this software and associated documentation files (the "Software"), to deal
     5  // in the Software without restriction, including without limitation the rights
     6  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     7  // copies of the Software, and to permit persons to whom the Software is
     8  // furnished to do so, subject to the following conditions:
     9  //
    10  // The above copyright notice and this permission notice shall be included in
    11  // all copies or substantial portions of the Software.
    12  //
    13  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    14  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    15  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    16  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    17  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    18  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    19  // THE SOFTWARE.
    20  
    21  package client
    22  
    23  import (
    24  	"io"
    25  	"io/ioutil"
    26  	"net/http"
    27  	"time"
    28  
    29  	"go.uber.org/zap"
    30  )
    31  
    32  const timeout = time.Duration(5 * time.Second)
    33  
    34  // DoGet is the low level call to the backend api for gets.
    35  func DoGet(
    36  	url string,
    37  	headers map[string]string,
    38  	l *zap.Logger,
    39  ) ([]byte, error) {
    40  	l.Info("request", zap.String("method", "get"), zap.String("url", url))
    41  	client := http.Client{
    42  		Timeout: timeout,
    43  	}
    44  	req, err := http.NewRequest(http.MethodGet, url, nil)
    45  	if err != nil {
    46  		return nil, err
    47  	}
    48  
    49  	setHeadersWithDefaults(req, headers)
    50  	resp, err := client.Do(req)
    51  	if err != nil {
    52  		return nil, err
    53  	}
    54  	defer func() {
    55  		ioutil.ReadAll(resp.Body)
    56  		resp.Body.Close()
    57  	}()
    58  	if err := checkForAndHandleError(url, resp, l); err != nil {
    59  		return nil, err
    60  	}
    61  	return ioutil.ReadAll(resp.Body)
    62  }
    63  
    64  // DoPost is the low level call to the backend api for posts.
    65  func DoPost(
    66  	url string,
    67  	headers map[string]string,
    68  	data io.Reader,
    69  	l *zap.Logger,
    70  ) ([]byte, error) {
    71  	l.Info("request", zap.String("method", "post"), zap.String("url", url))
    72  	client := &http.Client{
    73  		Timeout: timeout,
    74  	}
    75  	req, err := http.NewRequest(http.MethodPost, url, data)
    76  	if err != nil {
    77  		return nil, err
    78  	}
    79  
    80  	setHeadersWithDefaults(req, headers)
    81  	resp, err := client.Do(req)
    82  	if err != nil {
    83  		return nil, err
    84  	}
    85  	defer func() {
    86  		ioutil.ReadAll(resp.Body)
    87  		resp.Body.Close()
    88  	}()
    89  	if err := checkForAndHandleError(url, resp, l); err != nil {
    90  		return nil, err
    91  	}
    92  	return ioutil.ReadAll(resp.Body)
    93  }
    94  
    95  // DoDelete is the low level call to the backend api for deletes.
    96  func DoDelete(
    97  	url string,
    98  	headers map[string]string,
    99  	l *zap.Logger,
   100  ) ([]byte, error) {
   101  	l.Info("request", zap.String("method", "delete"), zap.String("url", url))
   102  	client := &http.Client{
   103  		Timeout: timeout,
   104  	}
   105  	req, err := http.NewRequest(http.MethodDelete, url, nil)
   106  	if err != nil {
   107  		return nil, err
   108  	}
   109  
   110  	setHeadersWithDefaults(req, headers)
   111  	resp, err := client.Do(req)
   112  	if err != nil {
   113  		return nil, err
   114  	}
   115  	defer func() {
   116  		ioutil.ReadAll(resp.Body)
   117  		resp.Body.Close()
   118  	}()
   119  	if err := checkForAndHandleError(url, resp, l); err != nil {
   120  		return nil, err
   121  	}
   122  	return ioutil.ReadAll(resp.Body)
   123  }
   124  
   125  func setHeadersWithDefaults(req *http.Request, headers map[string]string) {
   126  	req.Header.Set("Content-Type", "application/json")
   127  	for k, v := range headers {
   128  		req.Header.Set(k, v)
   129  	}
   130  }