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Source file src/net/http/httptest/httptest.go

Documentation: net/http/httptest

     1  // Copyright 2016 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  // Package httptest provides utilities for HTTP testing.
     6  package httptest
     7  
     8  import (
     9  	"bufio"
    10  	"bytes"
    11  	"crypto/tls"
    12  	"io"
    13  	"io/ioutil"
    14  	"net/http"
    15  	"strings"
    16  )
    17  
    18  // NewRequest returns a new incoming server Request, suitable
    19  // for passing to an http.Handler for testing.
    20  //
    21  // The target is the RFC 7230 "request-target": it may be either a
    22  // path or an absolute URL. If target is an absolute URL, the host name
    23  // from the URL is used. Otherwise, "example.com" is used.
    24  //
    25  // The TLS field is set to a non-nil dummy value if target has scheme
    26  // "https".
    27  //
    28  // The Request.Proto is always HTTP/1.1.
    29  //
    30  // An empty method means "GET".
    31  //
    32  // The provided body may be nil. If the body is of type *bytes.Reader,
    33  // *strings.Reader, or *bytes.Buffer, the Request.ContentLength is
    34  // set.
    35  //
    36  // NewRequest panics on error for ease of use in testing, where a
    37  // panic is acceptable.
    38  //
    39  // To generate a client HTTP request instead of a server request, see
    40  // the NewRequest function in the net/http package.
    41  func NewRequest(method, target string, body io.Reader) *http.Request {
    42  	if method == "" {
    43  		method = "GET"
    44  	}
    45  	req, err := http.ReadRequest(bufio.NewReader(strings.NewReader(method + " " + target + " HTTP/1.0\r\n\r\n")))
    46  	if err != nil {
    47  		panic("invalid NewRequest arguments; " + err.Error())
    48  	}
    49  
    50  	// HTTP/1.0 was used above to avoid needing a Host field. Change it to 1.1 here.
    51  	req.Proto = "HTTP/1.1"
    52  	req.ProtoMinor = 1
    53  	req.Close = false
    54  
    55  	if body != nil {
    56  		switch v := body.(type) {
    57  		case *bytes.Buffer:
    58  			req.ContentLength = int64(v.Len())
    59  		case *bytes.Reader:
    60  			req.ContentLength = int64(v.Len())
    61  		case *strings.Reader:
    62  			req.ContentLength = int64(v.Len())
    63  		default:
    64  			req.ContentLength = -1
    65  		}
    66  		if rc, ok := body.(io.ReadCloser); ok {
    67  			req.Body = rc
    68  		} else {
    69  			req.Body = ioutil.NopCloser(body)
    70  		}
    71  	}
    72  
    73  	// 192.0.2.0/24 is "TEST-NET" in RFC 5737 for use solely in
    74  	// documentation and example source code and should not be
    75  	// used publicly.
    76  	req.RemoteAddr = "192.0.2.1:1234"
    77  
    78  	if req.Host == "" {
    79  		req.Host = "example.com"
    80  	}
    81  
    82  	if strings.HasPrefix(target, "https://") {
    83  		req.TLS = &tls.ConnectionState{
    84  			Version:           tls.VersionTLS12,
    85  			HandshakeComplete: true,
    86  			ServerName:        req.Host,
    87  		}
    88  	}
    89  
    90  	return req
    91  }
    92  

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