Golang Tee.WriteBuffer方法代码示例

func (h *Http) readRequests(tee *conn.Tee, lastTxn chan *HttpTxn, connCtx interface{}) {
	defer close(lastTxn)

	for {
		req, err := http.ReadRequest(tee.WriteBuffer())
		if err != nil {
			// no more requests to be read, we're done
			break
		}

		// make sure we read the body of the request so that
		// we don't block the writer
		_, err = httputil.DumpRequest(req, true)

		h.reqMeter.Mark(1)
		if err != nil {
			tee.Warn("Failed to extract request body: %v", err)
		}

		// golang's ReadRequest/DumpRequestOut is broken. Fix up the request so it works later
		req.URL.Scheme = "http"
		req.URL.Host = req.Host

		txn := &HttpTxn{Start: time.Now(), ConnUserCtx: connCtx}
		txn.Req = &HttpRequest{Request: req}
		txn.Req.BodyBytes, txn.Req.Body, err = extractBody(req.Body)

		lastTxn <- txn
		h.Txns.In() <- txn
	}
}

func (h *Http) readRequests(tee *conn.Tee, lastTxn chan *HttpTxn) {
	for {
		req, err := http.ReadRequest(tee.WriteBuffer())
		if err != nil {
			// no more requests to be read, we're done
			break
		}

		// make sure we read the body of the request so that
		// we don't block the writer
		_, err = httputil.DumpRequest(req, true)

		h.reqMeter.Mark(1)
		if err != nil {
			tee.Warn("Failed to extract request body: %v", err)
		}

		txn := &HttpTxn{Start: time.Now()}
		txn.Req = &HttpRequest{Request: req}
		txn.Req.BodyBytes, txn.Req.Body, err = extractBody(req.Body)

		lastTxn <- txn
		h.Txns.In() <- txn
	}
}

func (h *Http) readRequests(tee *conn.Tee, lastTxn chan *HttpTxn) {
	for {
		req, err := http.ReadRequest(tee.WriteBuffer())
		if err != nil {
			// no more requests to be read, we're done
			break
		}

		// make sure we read the body of the request so that
		// we don't block the writer
		_, err = httputil.DumpRequest(req, true)

		h.reqMeter.Mark(1)
		if err != nil {
			tee.Warn("Failed to extract request body: %v", err)
		}

		// net/http's ReadRequest doesn't properly create the req.URL
		// structure, which is needed to properly DumpRequest() later
		req.URL, err = url.Parse(req.RequestURI)
		req.URL.Host = req.Host
		req.URL.Scheme = "http"

		txn := &HttpTxn{Start: time.Now()}
		txn.Req = &HttpRequest{Request: req}
		txn.Req.BodyBytes, txn.Req.Body, err = extractBody(req.Body)

		lastTxn <- txn
		h.Txns.In() <- txn
	}
}

func (h *Http) readResponses(tee *conn.Tee, lastTxn chan *HttpTxn) {
	for txn := range lastTxn {
		resp, err := http.ReadResponse(tee.ReadBuffer(), txn.Req.Request)
		txn.Duration = time.Since(txn.Start)
		h.reqTimer.Update(txn.Duration)
		if err != nil {
			tee.Warn("Error reading response from server: %v", err)
			// no more responses to be read, we're done
			break
		}
		// make sure we read the body of the response so that
		// we don't block the reader
		_, _ = httputil.DumpResponse(resp, true)

		txn.Resp = &HttpResponse{Response: resp}
		// apparently, Body can be nil in some cases
		if resp.Body != nil {
			txn.Resp.BodyBytes, txn.Resp.Body, err = extractBody(resp.Body)
			if err != nil {
				tee.Warn("Failed to extract response body: %v", err)
			}
		}

		h.Txns.In() <- txn

		// XXX: remove web socket shim in favor of a real websocket protocol analyzer
		if txn.Req.Header.Get("Upgrade") == "websocket" {
			tee.Info("Upgrading to websocket")
			var wg sync.WaitGroup

			// shim for websockets
			// in order for websockets to work, we need to continue reading all of the
			// the bytes in the analyzer so that the joined connections will continue
			// sending bytes to each other
			wg.Add(2)
			go func() {
				ioutil.ReadAll(tee.WriteBuffer())
				wg.Done()
			}()

			go func() {
				ioutil.ReadAll(tee.ReadBuffer())
				wg.Done()
			}()

			wg.Wait()
			break
		}
	}
}