curl.go

Documentation: go.etcd.io/etcd/client/v2

     1  // Copyright 2015 The etcd Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package client
    16  
    17  import (
    18  	"bytes"
    19  	"fmt"
    20  	"io/ioutil"
    21  	"net/http"
    22  	"os"
    23  )
    24  
    25  var (
    26  	cURLDebug = false
    27  )
    28  
    29  func EnablecURLDebug() {
    30  	cURLDebug = true
    31  }
    32  
    33  func DisablecURLDebug() {
    34  	cURLDebug = false
    35  }
    36  
    37  // printcURL prints the cURL equivalent request to stderr.
    38  // It returns an error if the body of the request cannot
    39  // be read.
    40  // The caller MUST cancel the request if there is an error.
    41  func printcURL(req *http.Request) error {
    42  	if !cURLDebug {
    43  		return nil
    44  	}
    45  	var (
    46  		command string
    47  		b       []byte
    48  		err     error
    49  	)
    50  
    51  	if req.URL != nil {
    52  		command = fmt.Sprintf("curl -X %s %s", req.Method, req.URL.String())
    53  	}
    54  
    55  	if req.Body != nil {
    56  		b, err = ioutil.ReadAll(req.Body)
    57  		if err != nil {
    58  			return err
    59  		}
    60  		command += fmt.Sprintf(" -d %q", string(b))
    61  	}
    62  
    63  	fmt.Fprintf(os.Stderr, "cURL Command: %s\n", command)
    64  
    65  	// reset body
    66  	body := bytes.NewBuffer(b)
    67  	req.Body = ioutil.NopCloser(body)
    68  
    69  	return nil
    70  }
    71
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