| // 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. |
| |
| package http_test |
| |
| import ( |
| "bytes" |
| "fmt" |
| "io" |
| "io/ioutil" |
| "log" |
| . "net/http" |
| "net/http/httptest" |
| "reflect" |
| "strconv" |
| "strings" |
| "testing" |
| ) |
| |
| var sniffTests = []struct { |
| desc string |
| data []byte |
| contentType string |
| }{ |
| // Some nonsense. |
| {"Empty", []byte{}, "text/plain; charset=utf-8"}, |
| {"Binary", []byte{1, 2, 3}, "application/octet-stream"}, |
| |
| {"HTML document #1", []byte(`<HtMl><bOdY>blah blah blah</body></html>`), "text/html; charset=utf-8"}, |
| {"HTML document #2", []byte(`<HTML></HTML>`), "text/html; charset=utf-8"}, |
| {"HTML document #3 (leading whitespace)", []byte(` <!DOCTYPE HTML>...`), "text/html; charset=utf-8"}, |
| {"HTML document #4 (leading CRLF)", []byte("\r\n<html>..."), "text/html; charset=utf-8"}, |
| |
| {"Plain text", []byte(`This is not HTML. It has ☃ though.`), "text/plain; charset=utf-8"}, |
| |
| {"XML", []byte("\n<?xml!"), "text/xml; charset=utf-8"}, |
| |
| // Image types. |
| {"GIF 87a", []byte(`GIF87a`), "image/gif"}, |
| {"GIF 89a", []byte(`GIF89a...`), "image/gif"}, |
| |
| // TODO(dsymonds): Re-enable this when the spec is sorted w.r.t. MP4. |
| //{"MP4 video", []byte("\x00\x00\x00\x18ftypmp42\x00\x00\x00\x00mp42isom<\x06t\xbfmdat"), "video/mp4"}, |
| //{"MP4 audio", []byte("\x00\x00\x00\x20ftypM4A \x00\x00\x00\x00M4A mp42isom\x00\x00\x00\x00"), "audio/mp4"}, |
| } |
| |
| func TestDetectContentType(t *testing.T) { |
| for _, tt := range sniffTests { |
| ct := DetectContentType(tt.data) |
| if ct != tt.contentType { |
| t.Errorf("%v: DetectContentType = %q, want %q", tt.desc, ct, tt.contentType) |
| } |
| } |
| } |
| |
| func TestServerContentType(t *testing.T) { |
| defer afterTest(t) |
| ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) { |
| i, _ := strconv.Atoi(r.FormValue("i")) |
| tt := sniffTests[i] |
| n, err := w.Write(tt.data) |
| if n != len(tt.data) || err != nil { |
| log.Fatalf("%v: Write(%q) = %v, %v want %d, nil", tt.desc, tt.data, n, err, len(tt.data)) |
| } |
| })) |
| defer ts.Close() |
| |
| for i, tt := range sniffTests { |
| resp, err := Get(ts.URL + "/?i=" + strconv.Itoa(i)) |
| if err != nil { |
| t.Errorf("%v: %v", tt.desc, err) |
| continue |
| } |
| if ct := resp.Header.Get("Content-Type"); ct != tt.contentType { |
| t.Errorf("%v: Content-Type = %q, want %q", tt.desc, ct, tt.contentType) |
| } |
| data, err := ioutil.ReadAll(resp.Body) |
| if err != nil { |
| t.Errorf("%v: reading body: %v", tt.desc, err) |
| } else if !bytes.Equal(data, tt.data) { |
| t.Errorf("%v: data is %q, want %q", tt.desc, data, tt.data) |
| } |
| resp.Body.Close() |
| } |
| } |
| |
| // Issue 5953: shouldn't sniff if the handler set a Content-Type header, |
| // even if it's the empty string. |
| func TestServerIssue5953(t *testing.T) { |
| defer afterTest(t) |
| ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) { |
| w.Header()["Content-Type"] = []string{""} |
| fmt.Fprintf(w, "<html><head></head><body>hi</body></html>") |
| })) |
| defer ts.Close() |
| |
| resp, err := Get(ts.URL) |
| if err != nil { |
| t.Fatal(err) |
| } |
| |
| got := resp.Header["Content-Type"] |
| want := []string{""} |
| if !reflect.DeepEqual(got, want) { |
| t.Errorf("Content-Type = %q; want %q", got, want) |
| } |
| resp.Body.Close() |
| } |
| |
| func TestContentTypeWithCopy(t *testing.T) { |
| defer afterTest(t) |
| |
| const ( |
| input = "\n<html>\n\t<head>\n" |
| expected = "text/html; charset=utf-8" |
| ) |
| |
| ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) { |
| // Use io.Copy from a bytes.Buffer to trigger ReadFrom. |
| buf := bytes.NewBuffer([]byte(input)) |
| n, err := io.Copy(w, buf) |
| if int(n) != len(input) || err != nil { |
| t.Errorf("io.Copy(w, %q) = %v, %v want %d, nil", input, n, err, len(input)) |
| } |
| })) |
| defer ts.Close() |
| |
| resp, err := Get(ts.URL) |
| if err != nil { |
| t.Fatalf("Get: %v", err) |
| } |
| if ct := resp.Header.Get("Content-Type"); ct != expected { |
| t.Errorf("Content-Type = %q, want %q", ct, expected) |
| } |
| data, err := ioutil.ReadAll(resp.Body) |
| if err != nil { |
| t.Errorf("reading body: %v", err) |
| } else if !bytes.Equal(data, []byte(input)) { |
| t.Errorf("data is %q, want %q", data, input) |
| } |
| resp.Body.Close() |
| } |
| |
| func TestSniffWriteSize(t *testing.T) { |
| defer afterTest(t) |
| ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) { |
| size, _ := strconv.Atoi(r.FormValue("size")) |
| written, err := io.WriteString(w, strings.Repeat("a", size)) |
| if err != nil { |
| t.Errorf("write of %d bytes: %v", size, err) |
| return |
| } |
| if written != size { |
| t.Errorf("write of %d bytes wrote %d bytes", size, written) |
| } |
| })) |
| defer ts.Close() |
| for _, size := range []int{0, 1, 200, 600, 999, 1000, 1023, 1024, 512 << 10, 1 << 20} { |
| res, err := Get(fmt.Sprintf("%s/?size=%d", ts.URL, size)) |
| if err != nil { |
| t.Fatalf("size %d: %v", size, err) |
| } |
| if _, err := io.Copy(ioutil.Discard, res.Body); err != nil { |
| t.Fatalf("size %d: io.Copy of body = %v", size, err) |
| } |
| if err := res.Body.Close(); err != nil { |
| t.Fatalf("size %d: body Close = %v", size, err) |
| } |
| } |
| } |
