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// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Tests a Go CGI program running under a Go CGI host process.
// Further, the two programs are the same binary, just checking
// their environment to figure out what mode to run in.
package cgi
import (
"bytes"
"errors"
"fmt"
"internal/testenv"
"io"
"net/http"
"net/http/httptest"
"os"
"testing"
"time"
)
// This test is a CGI host (testing host.go) that runs its own binary
// as a child process testing the other half of CGI (child.go).
func TestHostingOurselves(t *testing.T) {
testenv.MustHaveExec(t)
h := &Handler{
Path: os.Args[0],
Root: "/test.go",
Args: []string{"-test.run=TestBeChildCGIProcess"},
}
expectedMap := map[string]string{
"test": "Hello CGI-in-CGI",
"param-a": "b",
"param-foo": "bar",
"env-GATEWAY_INTERFACE": "CGI/1.1",
"env-HTTP_HOST": "example.com",
"env-PATH_INFO": "",
"env-QUERY_STRING": "foo=bar&a=b",
"env-REMOTE_ADDR": "1.2.3.4",
"env-REMOTE_HOST": "1.2.3.4",
"env-REMOTE_PORT": "1234",
"env-REQUEST_METHOD": "GET",
"env-REQUEST_URI": "/test.go?foo=bar&a=b",
"env-SCRIPT_FILENAME": os.Args[0],
"env-SCRIPT_NAME": "/test.go",
"env-SERVER_NAME": "example.com",
"env-SERVER_PORT": "80",
"env-SERVER_SOFTWARE": "go",
}
replay := runCgiTest(t, h, "GET /test.go?foo=bar&a=b HTTP/1.0\nHost: example.com\n\n", expectedMap)
if expected, got := "text/html; charset=utf-8", replay.Header().Get("Content-Type"); got != expected {
t.Errorf("got a Content-Type of %q; expected %q", got, expected)
}
if expected, got := "X-Test-Value", replay.Header().Get("X-Test-Header"); got != expected {
t.Errorf("got a X-Test-Header of %q; expected %q", got, expected)
}
}
type customWriterRecorder struct {
w io.Writer
*httptest.ResponseRecorder
}
func (r *customWriterRecorder) Write(p []byte) (n int, err error) {
return r.w.Write(p)
}
type limitWriter struct {
w io.Writer
n int
}
func (w *limitWriter) Write(p []byte) (n int, err error) {
if len(p) > w.n {
p = p[:w.n]
}
if len(p) > 0 {
n, err = w.w.Write(p)
w.n -= n
}
if w.n == 0 {
err = errors.New("past write limit")
}
return
}
// If there's an error copying the child's output to the parent, test
// that we kill the child.
func TestKillChildAfterCopyError(t *testing.T) {
testenv.MustHaveExec(t)
defer func() { testHookStartProcess = nil }()
proc := make(chan *os.Process, 1)
testHookStartProcess = func(p *os.Process) {
proc <- p
}
h := &Handler{
Path: os.Args[0],
Root: "/test.go",
Args: []string{"-test.run=TestBeChildCGIProcess"},
}
req, _ := http.NewRequest("GET", "http://example.com/test.cgi?write-forever=1", nil)
rec := httptest.NewRecorder()
var out bytes.Buffer
const writeLen = 50 << 10
rw := &customWriterRecorder{&limitWriter{&out, writeLen}, rec}
donec := make(chan bool, 1)
go func() {
h.ServeHTTP(rw, req)
donec <- true
}()
select {
case <-donec:
if out.Len() != writeLen || out.Bytes()[0] != 'a' {
t.Errorf("unexpected output: %q", out.Bytes())
}
case <-time.After(5 * time.Second):
t.Errorf("timeout. ServeHTTP hung and didn't kill the child process?")
select {
case p := <-proc:
p.Kill()
t.Logf("killed process")
default:
t.Logf("didn't kill process")
}
}
}
// Test that a child handler writing only headers works.
// golang.org/issue/7196
func TestChildOnlyHeaders(t *testing.T) {
testenv.MustHaveExec(t)
h := &Handler{
Path: os.Args[0],
Root: "/test.go",
Args: []string{"-test.run=TestBeChildCGIProcess"},
}
expectedMap := map[string]string{
"_body": "",
}
replay := runCgiTest(t, h, "GET /test.go?no-body=1 HTTP/1.0\nHost: example.com\n\n", expectedMap)
if expected, got := "X-Test-Value", replay.Header().Get("X-Test-Header"); got != expected {
t.Errorf("got a X-Test-Header of %q; expected %q", got, expected)
}
}
// golang.org/issue/7198
func Test500WithNoHeaders(t *testing.T) { want500Test(t, "/immediate-disconnect") }
func Test500WithNoContentType(t *testing.T) { want500Test(t, "/no-content-type") }
func Test500WithEmptyHeaders(t *testing.T) { want500Test(t, "/empty-headers") }
func want500Test(t *testing.T, path string) {
h := &Handler{
Path: os.Args[0],
Root: "/test.go",
Args: []string{"-test.run=TestBeChildCGIProcess"},
}
expectedMap := map[string]string{
"_body": "",
}
replay := runCgiTest(t, h, "GET "+path+" HTTP/1.0\nHost: example.com\n\n", expectedMap)
if replay.Code != 500 {
t.Errorf("Got code %d; want 500", replay.Code)
}
}
type neverEnding byte
func (b neverEnding) Read(p []byte) (n int, err error) {
for i := range p {
p[i] = byte(b)
}
return len(p), nil
}
// Note: not actually a test.
func TestBeChildCGIProcess(t *testing.T) {
if os.Getenv("REQUEST_METHOD") == "" {
// Not in a CGI environment; skipping test.
return
}
switch os.Getenv("REQUEST_URI") {
case "/immediate-disconnect":
os.Exit(0)
case "/no-content-type":
fmt.Printf("Content-Length: 6\n\nHello\n")
os.Exit(0)
case "/empty-headers":
fmt.Printf("\nHello")
os.Exit(0)
}
Serve(http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
rw.Header().Set("X-Test-Header", "X-Test-Value")
req.ParseForm()
if req.FormValue("no-body") == "1" {
return
}
if req.FormValue("write-forever") == "1" {
io.Copy(rw, neverEnding('a'))
for {
time.Sleep(5 * time.Second) // hang forever, until killed
}
}
fmt.Fprintf(rw, "test=Hello CGI-in-CGI\n")
for k, vv := range req.Form {
for _, v := range vv {
fmt.Fprintf(rw, "param-%s=%s\n", k, v)
}
}
for _, kv := range os.Environ() {
fmt.Fprintf(rw, "env-%s\n", kv)
}
}))
os.Exit(0)
}
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