Golang Response.Body方法代码示例

func convertResponse(stdreq *http.Request, fastresp *fasthttp.Response) *http.Response {
	status := fastresp.Header.StatusCode()
	body := fastresp.Body()

	stdresp := &http.Response{
		Request:    stdreq,
		StatusCode: status,
		Status:     http.StatusText(status),
	}

	fastresp.Header.VisitAll(func(k, v []byte) {
		sk := string(k)
		sv := string(v)
		if stdresp.Header == nil {
			stdresp.Header = make(http.Header)
		}
		stdresp.Header.Add(sk, sv)
	})

	if fastresp.Header.ContentLength() == -1 {
		stdresp.TransferEncoding = []string{"chunked"}
	}

	if body != nil {
		stdresp.Body = ioutil.NopCloser(bytes.NewReader(body))
	} else {
		stdresp.Body = ioutil.NopCloser(bytes.NewReader(nil))
	}

	return stdresp
}

func ExampleLBClient() {
	// Requests will be spread among these servers.
	servers := []string{
		"google.com:80",
		"foobar.com:8080",
		"127.0.0.1:123",
	}

	// Prepare clients for each server
	var lbc fasthttp.LBClient
	for _, addr := range servers {
		c := &fasthttp.HostClient{
			Addr: addr,
		}
		lbc.Clients = append(lbc.Clients, c)
	}

	// Send requests to load-balanced servers
	var req fasthttp.Request
	var resp fasthttp.Response
	for i := 0; i < 10; i++ {
		url := fmt.Sprintf("http://abcedfg/foo/bar/%d", i)
		req.SetRequestURI(url)
		if err := lbc.Do(&req, &resp); err != nil {
			log.Fatalf("Error when sending request: %s", err)
		}
		if resp.StatusCode() != fasthttp.StatusOK {
			log.Fatalf("unexpected status code: %d. Expecting %d", resp.StatusCode(), fasthttp.StatusOK)
		}

		useResponseBody(resp.Body())
	}
}

func fetchFromUpstream(h *fasthttp.RequestHeader, key []byte) *ybc.Item {
	upstreamUrl := fmt.Sprintf("%s://%s%s", *upstreamProtocol, *upstreamHost, h.RequestURI())
	var req fasthttp.Request
	req.SetRequestURI(upstreamUrl)

	var resp fasthttp.Response
	err := upstreamClient.Do(&req, &resp)
	if err != nil {
		logRequestError(h, "Cannot make request for [%s]: [%s]", key, err)
		return nil
	}

	if resp.StatusCode() != fasthttp.StatusOK {
		logRequestError(h, "Unexpected status code=%d for the response [%s]", resp.StatusCode(), key)
		return nil
	}

	contentType := string(resp.Header.ContentType())
	if contentType == "" {
		contentType = "application/octet-stream"
	}
	body := resp.Body()
	contentLength := len(body)
	itemSize := contentLength + len(contentType) + 1
	txn, err := cache.NewSetTxn(key, itemSize, ybc.MaxTtl)
	if err != nil {
		logRequestError(h, "Cannot start set txn for response [%s], itemSize=%d: [%s]", key, itemSize, err)
		return nil
	}

	if err = storeContentType(h, txn, contentType); err != nil {
		txn.Rollback()
		return nil
	}

	n, err := txn.Write(body)
	if err != nil {
		logRequestError(h, "Cannot read response [%s] body with size=%d to cache: [%s]", key, contentLength, err)
		txn.Rollback()
		return nil
	}
	if n != contentLength {
		logRequestError(h, "Unexpected number of bytes copied=%d from response [%s] to cache. Expected %d", n, key, contentLength)
		txn.Rollback()
		return nil
	}
	item, err := txn.CommitItem()
	if err != nil {
		logRequestError(h, "Cannot commit set txn for response [%s], size=%d: [%s]", key, contentLength, err)
		return nil
	}
	atomic.AddInt64(&stats.BytesReadFromUpstream, int64(n))
	return item
}

func TestRouterServeFiles(t *testing.T) {
	router := New()

	recv := catchPanic(func() {
		router.ServeFiles("/noFilepath", os.TempDir())
	})
	if recv == nil {
		t.Fatal("registering path not ending with '*filepath' did not panic")
	}
	body := []byte("fake ico")
	ioutil.WriteFile(os.TempDir()+"/favicon.ico", body, 0644)

	router.ServeFiles("/*filepath", os.TempDir())

	s := &fasthttp.Server{
		Handler: router.Handler,
	}

	rw := &readWriter{}
	ch := make(chan error)

	rw.r.WriteString(string("GET /favicon.ico HTTP/1.1\r\n\r\n"))
	go func() {
		ch <- s.ServeConn(rw)
	}()
	select {
	case err := <-ch:
		if err != nil {
			t.Fatalf("return error %s", err)
		}
	case <-time.After(500 * time.Millisecond):
		t.Fatalf("timeout")
	}

	br := bufio.NewReader(&rw.w)
	var resp fasthttp.Response
	if err := resp.Read(br); err != nil {
		t.Fatalf("Unexpected error when reading response: %s", err)
	}
	if resp.Header.StatusCode() != 200 {
		t.Fatalf("Unexpected status code %d. Expected %d", resp.Header.StatusCode(), 423)
	}
	if !bytes.Equal(resp.Body(), body) {
		t.Fatalf("Unexpected body %q. Expected %q", resp.Body(), string(body))
	}
}

func TestRouterNotAllowed(t *testing.T) {
	handlerFunc := func(_ *fasthttp.RequestCtx, _ Params) {}

	router := New()
	router.POST("/path", handlerFunc)

	// Test not allowed
	s := &fasthttp.Server{
		Handler: router.Handler,
	}

	rw := &readWriter{}
	ch := make(chan error)

	rw.r.WriteString("GET /path HTTP/1.1\r\n\r\n")
	go func() {
		ch <- s.ServeConn(rw)
	}()
	select {
	case err := <-ch:
		if err != nil {
			t.Fatalf("return error %s", err)
		}
	case <-time.After(100 * time.Millisecond):
		t.Fatalf("timeout")
	}
	br := bufio.NewReader(&rw.w)
	var resp fasthttp.Response
	if err := resp.Read(br); err != nil {
		t.Fatalf("Unexpected error when reading response: %s", err)
	}
	if !(resp.Header.StatusCode() == fasthttp.StatusMethodNotAllowed) {
		t.Errorf("NotAllowed handling failed: Code=%d, Header=%v", resp.Header.StatusCode(), resp.Header)
	} else if allow := string(resp.Header.Peek("Allow")); allow != "POST, OPTIONS" {
		t.Error("unexpected Allow header value: " + allow)
	}

	// add another method
	router.DELETE("/path", handlerFunc)
	router.OPTIONS("/path", handlerFunc) // must be ignored

	// test again
	rw.r.WriteString("GET /path HTTP/1.1\r\n\r\n")
	go func() {
		ch <- s.ServeConn(rw)
	}()
	select {
	case err := <-ch:
		if err != nil {
			t.Fatalf("return error %s", err)
		}
	case <-time.After(100 * time.Millisecond):
		t.Fatalf("timeout")
	}
	if err := resp.Read(br); err != nil {
		t.Fatalf("Unexpected error when reading response: %s", err)
	}
	if !(resp.Header.StatusCode() == fasthttp.StatusMethodNotAllowed) {
		t.Errorf("NotAllowed handling failed: Code=%d, Header=%v", resp.Header.StatusCode(), resp.Header)
	} else if allow := string(resp.Header.Peek("Allow")); allow != "POST, DELETE, OPTIONS" && allow != "DELETE, POST, OPTIONS" {
		t.Error("unexpected Allow header value: " + allow)
	}

	responseText := "custom method"
	router.MethodNotAllowed = fasthttp.RequestHandler(func(ctx *fasthttp.RequestCtx) {
		ctx.SetStatusCode(fasthttp.StatusTeapot)
		ctx.Write([]byte(responseText))
	})
	rw.r.WriteString("GET /path HTTP/1.1\r\n\r\n")
	go func() {
		ch <- s.ServeConn(rw)
	}()
	select {
	case err := <-ch:
		if err != nil {
			t.Fatalf("return error %s", err)
		}
	case <-time.After(100 * time.Millisecond):
		t.Fatalf("timeout")
	}
	if err := resp.Read(br); err != nil {
		t.Fatalf("Unexpected error when reading response: %s", err)
	}
	if !bytes.Equal(resp.Body(), []byte(responseText)) {
		t.Errorf("unexpected response got %q want %q", string(resp.Body()), responseText)
	}
	if resp.Header.StatusCode() != fasthttp.StatusTeapot {
		t.Errorf("unexpected response code %d want %d", resp.Header.StatusCode(), fasthttp.StatusTeapot)
	}
	if allow := string(resp.Header.Peek("Allow")); allow != "POST, DELETE, OPTIONS" && allow != "DELETE, POST, OPTIONS" {
		t.Error("unexpected Allow header value: " + allow)
	}
}