libgo/go/net/http/cgi/matryoshka_test.go

   1 // Copyright 2011 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 // Tests a Go CGI program running under a Go CGI host process.
   6 // Further, the two programs are the same binary, just checking
   7 // their environment to figure out what mode to run in.
   8
   9 package cgi
  10
  11 import (
  12         "bytes"
  13         "errors"
  14         "fmt"
  15         "io"
  16         "net/http"
  17         "net/http/httptest"
  18         "os"
  19         "runtime"
  20         "testing"
  21         "time"
  22 )
  23
  24 // This test is a CGI host (testing host.go) that runs its own binary
  25 // as a child process testing the other half of CGI (child.go).
  26 func TestHostingOurselves(t *testing.T) {
  27         if runtime.GOOS == "nacl" {
  28                 t.Skip("skipping on nacl")
  29         }
  30
  31         h := &Handler{
  32                 Path: os.Args[0],
  33                 Root: "/test.go",
  34                 Args: []string{"-test.run=TestBeChildCGIProcess"},
  35         }
  36         expectedMap := map[string]string{
  37                 "test":                  "Hello CGI-in-CGI",
  38                 "param-a":               "b",
  39                 "param-foo":             "bar",
  40                 "env-GATEWAY_INTERFACE": "CGI/1.1",
  41                 "env-HTTP_HOST":         "example.com",
  42                 "env-PATH_INFO":         "",
  43                 "env-QUERY_STRING":      "foo=bar&a=b",
  44                 "env-REMOTE_ADDR":       "1.2.3.4",
  45                 "env-REMOTE_HOST":       "1.2.3.4",
  46                 "env-REQUEST_METHOD":    "GET",
  47                 "env-REQUEST_URI":       "/test.go?foo=bar&a=b",
  48                 "env-SCRIPT_FILENAME":   os.Args[0],
  49                 "env-SCRIPT_NAME":       "/test.go",
  50                 "env-SERVER_NAME":       "example.com",
  51                 "env-SERVER_PORT":       "80",
  52                 "env-SERVER_SOFTWARE":   "go",
  53         }
  54         replay := runCgiTest(t, h, "GET /test.go?foo=bar&a=b HTTP/1.0\nHost: example.com\n\n", expectedMap)
  55
  56         if expected, got := "text/html; charset=utf-8", replay.Header().Get("Content-Type"); got != expected {
  57                 t.Errorf("got a Content-Type of %q; expected %q", got, expected)
  58         }
  59         if expected, got := "X-Test-Value", replay.Header().Get("X-Test-Header"); got != expected {
  60                 t.Errorf("got a X-Test-Header of %q; expected %q", got, expected)
  61         }
  62 }
  63
  64 type customWriterRecorder struct {
  65         w io.Writer
  66         *httptest.ResponseRecorder
  67 }
  68
  69 func (r *customWriterRecorder) Write(p []byte) (n int, err error) {
  70         return r.w.Write(p)
  71 }
  72
  73 type limitWriter struct {
  74         w io.Writer
  75         n int
  76 }
  77
  78 func (w *limitWriter) Write(p []byte) (n int, err error) {
  79         if len(p) > w.n {
  80                 p = p[:w.n]
  81         }
  82         if len(p) > 0 {
  83                 n, err = w.w.Write(p)
  84                 w.n -= n
  85         }
  86         if w.n == 0 {
  87                 err = errors.New("past write limit")
  88         }
  89         return
  90 }
  91
  92 // If there's an error copying the child's output to the parent, test
  93 // that we kill the child.
  94 func TestKillChildAfterCopyError(t *testing.T) {
  95         if runtime.GOOS == "nacl" {
  96                 t.Skip("skipping on nacl")
  97         }
  98
  99         defer func() { testHookStartProcess = nil }()
 100         proc := make(chan *os.Process, 1)
 101         testHookStartProcess = func(p *os.Process) {
 102                 proc <- p
 103         }
 104
 105         h := &Handler{
 106                 Path: os.Args[0],
 107                 Root: "/test.go",
 108                 Args: []string{"-test.run=TestBeChildCGIProcess"},
 109         }
 110         req, _ := http.NewRequest("GET", "http://example.com/test.cgi?write-forever=1", nil)
 111         rec := httptest.NewRecorder()
 112         var out bytes.Buffer
 113         const writeLen = 50 << 10
 114         rw := &customWriterRecorder{&limitWriter{&out, writeLen}, rec}
 115
 116         donec := make(chan bool, 1)
 117         go func() {
 118                 h.ServeHTTP(rw, req)
 119                 donec <- true
 120         }()
 121
 122         select {
 123         case <-donec:
 124                 if out.Len() != writeLen || out.Bytes()[0] != 'a' {
 125                         t.Errorf("unexpected output: %q", out.Bytes())
 126                 }
 127         case <-time.After(5 * time.Second):
 128                 t.Errorf("timeout. ServeHTTP hung and didn't kill the child process?")
 129                 select {
 130                 case p := <-proc:
 131                         p.Kill()
 132                         t.Logf("killed process")
 133                 default:
 134                         t.Logf("didn't kill process")
 135                 }
 136         }
 137 }
 138
 139 // Test that a child handler writing only headers works.
 140 // golang.org/issue/7196
 141 func TestChildOnlyHeaders(t *testing.T) {
 142         if runtime.GOOS == "nacl" {
 143                 t.Skip("skipping on nacl")
 144         }
 145
 146         h := &Handler{
 147                 Path: os.Args[0],
 148                 Root: "/test.go",
 149                 Args: []string{"-test.run=TestBeChildCGIProcess"},
 150         }
 151         expectedMap := map[string]string{
 152                 "_body": "",
 153         }
 154         replay := runCgiTest(t, h, "GET /test.go?no-body=1 HTTP/1.0\nHost: example.com\n\n", expectedMap)
 155         if expected, got := "X-Test-Value", replay.Header().Get("X-Test-Header"); got != expected {
 156                 t.Errorf("got a X-Test-Header of %q; expected %q", got, expected)
 157         }
 158 }
 159
 160 // golang.org/issue/7198
 161 func Test500WithNoHeaders(t *testing.T)     { want500Test(t, "/immediate-disconnect") }
 162 func Test500WithNoContentType(t *testing.T) { want500Test(t, "/no-content-type") }
 163 func Test500WithEmptyHeaders(t *testing.T)  { want500Test(t, "/empty-headers") }
 164
 165 func want500Test(t *testing.T, path string) {
 166         h := &Handler{
 167                 Path: os.Args[0],
 168                 Root: "/test.go",
 169                 Args: []string{"-test.run=TestBeChildCGIProcess"},
 170         }
 171         expectedMap := map[string]string{
 172                 "_body": "",
 173         }
 174         replay := runCgiTest(t, h, "GET "+path+" HTTP/1.0\nHost: example.com\n\n", expectedMap)
 175         if replay.Code != 500 {
 176                 t.Errorf("Got code %d; want 500", replay.Code)
 177         }
 178 }
 179
 180 type neverEnding byte
 181
 182 func (b neverEnding) Read(p []byte) (n int, err error) {
 183         for i := range p {
 184                 p[i] = byte(b)
 185         }
 186         return len(p), nil
 187 }
 188
 189 // Note: not actually a test.
 190 func TestBeChildCGIProcess(t *testing.T) {
 191         if os.Getenv("REQUEST_METHOD") == "" {
 192                 // Not in a CGI environment; skipping test.
 193                 return
 194         }
 195         switch os.Getenv("REQUEST_URI") {
 196         case "/immediate-disconnect":
 197                 os.Exit(0)
 198         case "/no-content-type":
 199                 fmt.Printf("Content-Length: 6\n\nHello\n")
 200                 os.Exit(0)
 201         case "/empty-headers":
 202                 fmt.Printf("\nHello")
 203                 os.Exit(0)
 204         }
 205         Serve(http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
 206                 rw.Header().Set("X-Test-Header", "X-Test-Value")
 207                 req.ParseForm()
 208                 if req.FormValue("no-body") == "1" {
 209                         return
 210                 }
 211                 if req.FormValue("write-forever") == "1" {
 212                         io.Copy(rw, neverEnding('a'))
 213                         for {
 214                                 time.Sleep(5 * time.Second) // hang forever, until killed
 215                         }
 216                 }
 217                 fmt.Fprintf(rw, "test=Hello CGI-in-CGI\n")
 218                 for k, vv := range req.Form {
 219                         for _, v := range vv {
 220                                 fmt.Fprintf(rw, "param-%s=%s\n", k, v)
 221                         }
 222                 }
 223                 for _, kv := range os.Environ() {
 224                         fmt.Fprintf(rw, "env-%s\n", kv)
 225                 }
 226         }))
 227         os.Exit(0)
 228 }