| // 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" |
| "net/url" |
| "os" |
| "strings" |
| "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/plain; 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) |
| } |
| } |
| |
| func TestChildContentType(t *testing.T) { |
| testenv.MustHaveExec(t) |
| |
| h := &Handler{ |
| Path: os.Args[0], |
| Root: "/test.go", |
| Args: []string{"-test.run=TestBeChildCGIProcess"}, |
| } |
| var tests = []struct { |
| name string |
| body string |
| wantCT string |
| }{ |
| { |
| name: "no body", |
| wantCT: "text/plain; charset=utf-8", |
| }, |
| { |
| name: "html", |
| body: "<html><head><title>test page</title></head><body>This is a body</body></html>", |
| wantCT: "text/html; charset=utf-8", |
| }, |
| { |
| name: "text", |
| body: strings.Repeat("gopher", 86), |
| wantCT: "text/plain; charset=utf-8", |
| }, |
| { |
| name: "jpg", |
| body: "\xFF\xD8\xFF" + strings.Repeat("B", 1024), |
| wantCT: "image/jpeg", |
| }, |
| } |
| for _, tt := range tests { |
| t.Run(tt.name, func(t *testing.T) { |
| expectedMap := map[string]string{"_body": tt.body} |
| req := fmt.Sprintf("GET /test.go?exact-body=%s HTTP/1.0\nHost: example.com\n\n", url.QueryEscape(tt.body)) |
| replay := runCgiTest(t, h, req, expectedMap) |
| if got := replay.Header().Get("Content-Type"); got != tt.wantCT { |
| t.Errorf("got a Content-Type of %q; expected it to start with %q", got, tt.wantCT) |
| } |
| }) |
| } |
| } |
| |
| // 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 eb, ok := req.Form["exact-body"]; ok { |
| io.WriteString(rw, eb[0]) |
| 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) |
| } |