Example #1
0
func (p *proxy) ServeHTTP(responseWriter http.ResponseWriter, request *http.Request) {
	startedAt := time.Now()
	accessLog := access_log.AccessLogRecord{
		Request:   request,
		StartedAt: startedAt,
	}

	requestBodyCounter := &countingReadCloser{delegate: request.Body}
	request.Body = requestBodyCounter

	handler := NewRequestHandler(request, responseWriter, p.reporter, &accessLog)

	defer func() {
		accessLog.RequestBytesReceived = requestBodyCounter.count
		p.accessLogger.Log(accessLog)
	}()

	if !isProtocolSupported(request) {
		handler.HandleUnsupportedProtocol()
		return
	}

	if isLoadBalancerHeartbeat(request) {
		handler.HandleHeartbeat()
		return
	}

	routePool := p.lookup(request)
	if routePool == nil {
		p.reporter.CaptureBadRequest(request)
		handler.HandleMissingRoute()
		return
	}

	stickyEndpointId := p.getStickySession(request)
	iter := &wrappedIterator{
		nested: routePool.Endpoints(stickyEndpointId),

		afterNext: func(endpoint *route.Endpoint) {
			if endpoint != nil {
				handler.logger.Set("RouteEndpoint", endpoint.ToLogData())
				accessLog.RouteEndpoint = endpoint
				p.reporter.CaptureRoutingRequest(endpoint, request)
			}
		},
	}

	if isTcpUpgrade(request) {
		handler.HandleTcpRequest(iter)
		return
	}

	if isWebSocketUpgrade(request) {
		handler.HandleWebSocketRequest(iter)
		return
	}

	proxyWriter := newProxyResponseWriter(responseWriter)
	roundTripper := &proxyRoundTripper{
		transport:           dropsonde.InstrumentedRoundTripper(p.transport),
		iter:                iter,
		handler:             &handler,
		routeServiceTimeout: p.routeServiceTimeout,

		after: func(rsp *http.Response, endpoint *route.Endpoint, err error) {
			accessLog.FirstByteAt = time.Now()
			if rsp != nil {
				accessLog.StatusCode = rsp.StatusCode
			}

			if p.traceKey != "" && request.Header.Get(router_http.VcapTraceHeader) == p.traceKey {
				setTraceHeaders(responseWriter, p.ip, endpoint.CanonicalAddr())
			}

			latency := time.Since(startedAt)

			p.reporter.CaptureRoutingResponse(endpoint, rsp, startedAt, latency)

			if err != nil {
				p.reporter.CaptureBadGateway(request)
				handler.HandleBadGateway(err)
				proxyWriter.Done()
				return
			}

			if endpoint.PrivateInstanceId != "" {

				setupStickySession(responseWriter, rsp, endpoint, stickyEndpointId, p.secureCookies, routePool.ContextPath())
			}
		},
	}

	p.newReverseProxy(roundTripper, request).ServeHTTP(proxyWriter, request)

	accessLog.FinishedAt = time.Now()
	accessLog.BodyBytesSent = proxyWriter.Size()
}
Example #2
0
func (p *proxy) ServeHTTP(responseWriter http.ResponseWriter, request *http.Request) {
	startedAt := time.Now()
	accessLog := access_log.AccessLogRecord{
		Request:           request,
		StartedAt:         startedAt,
		ExtraHeadersToLog: p.ExtraHeadersToLog,
	}

	requestBodyCounter := &countingReadCloser{delegate: request.Body}
	request.Body = requestBodyCounter

	proxyWriter := NewProxyResponseWriter(responseWriter)
	handler := NewRequestHandler(request, proxyWriter, p.reporter, &accessLog)

	defer func() {
		accessLog.RequestBytesReceived = requestBodyCounter.count
		p.accessLogger.Log(accessLog)
	}()

	if !isProtocolSupported(request) {
		handler.HandleUnsupportedProtocol()
		return
	}

	if isLoadBalancerHeartbeat(request) {
		handler.HandleHeartbeat()
		return
	}

	routePool := p.lookup(request)
	if routePool == nil {
		p.reporter.CaptureBadRequest(request)
		handler.HandleMissingRoute()
		return
	}

	stickyEndpointId := p.getStickySession(request)
	iter := &wrappedIterator{
		nested: routePool.Endpoints(stickyEndpointId),

		afterNext: func(endpoint *route.Endpoint) {
			if endpoint != nil {
				handler.Logger().Set("RouteEndpoint", endpoint.ToLogData())
				accessLog.RouteEndpoint = endpoint
				p.reporter.CaptureRoutingRequest(endpoint, request)
			}
		},
	}

	if isTcpUpgrade(request) {
		handler.HandleTcpRequest(iter)
		return
	}

	if isWebSocketUpgrade(request) {
		handler.HandleWebSocketRequest(iter)
		return
	}

	backend := true

	routeServiceUrl := routePool.RouteServiceUrl()
	// Attempted to use a route service when it is not supported
	if routeServiceUrl != "" && !p.routeServiceConfig.RouteServiceEnabled() {
		handler.HandleUnsupportedRouteService()
		return
	}

	var routeServiceArgs route_service.RouteServiceArgs
	if routeServiceUrl != "" {
		rsSignature := request.Header.Get(route_service.RouteServiceSignature)
		if hasBeenToRouteService(routeServiceUrl, rsSignature) {
			// A request from a route service destined for a backend instances
			routeServiceArgs.UrlString = routeServiceUrl
			err := p.routeServiceConfig.ValidateSignature(&request.Header)
			if err != nil {
				handler.HandleBadSignature(err)
				return
			}
		} else {
			var err error

			// should not hardcode http, will be addressed by #100982038
			forwardedUrlRaw := "http" + "://" + request.Host + request.RequestURI
			routeServiceArgs, err = buildRouteServiceArgs(p.routeServiceConfig, routeServiceUrl, forwardedUrlRaw)
			backend = false
			if err != nil {
				handler.HandleRouteServiceFailure(err)
				return
			}
		}
	}

	after := func(rsp *http.Response, endpoint *route.Endpoint, err error) {
		accessLog.FirstByteAt = time.Now()
		if rsp != nil {
			accessLog.StatusCode = rsp.StatusCode
		}

		if p.traceKey != "" && request.Header.Get(router_http.VcapTraceHeader) == p.traceKey {
			setTraceHeaders(responseWriter, p.ip, endpoint.CanonicalAddr())
		}

		latency := time.Since(startedAt)

		p.reporter.CaptureRoutingResponse(endpoint, rsp, startedAt, latency)

		if err != nil {
			p.reporter.CaptureBadGateway(request)
			handler.HandleBadGateway(err)
			return
		}

		if endpoint.PrivateInstanceId != "" {
			setupStickySession(responseWriter, rsp, endpoint, stickyEndpointId, p.secureCookies, routePool.ContextPath())
		}
	}

	roundTripper := NewProxyRoundTripper(backend,
		dropsonde.InstrumentedRoundTripper(p.transport), iter, handler, after)

	newReverseProxy(roundTripper, request, routeServiceArgs, p.routeServiceConfig).ServeHTTP(proxyWriter, request)

	accessLog.FinishedAt = time.Now()
	accessLog.BodyBytesSent = proxyWriter.Size()
}
Example #3
0
func (p *proxy) ServeHTTP(responseWriter http.ResponseWriter, request *http.Request) {
	startedAt := time.Now()

	accessLog := access_log.AccessLogRecord{
		Request:   request,
		StartedAt: startedAt,
	}

	handler := NewRequestHandler(request, responseWriter, p.reporter, &accessLog)

	p.waitgroup.Add(1)

	defer func() {
		p.accessLogger.Log(accessLog)
		p.waitgroup.Done()
	}()

	if !isProtocolSupported(request) {
		handler.HandleUnsupportedProtocol()
		return
	}

	if isLoadBalancerHeartbeat(request) {
		handler.HandleHeartbeat()
		return
	}

	routePool := p.lookup(request)
	if routePool == nil {
		p.reporter.CaptureBadRequest(request)
		handler.HandleMissingRoute()
		return
	}

	stickyEndpointId := p.getStickySession(request)
	iter := &wrappedIterator{
		nested: routePool.Endpoints(stickyEndpointId),

		afterNext: func(endpoint *route.Endpoint) {
			if endpoint != nil {
				handler.logger.Set("RouteEndpoint", endpoint.ToLogData())
				accessLog.RouteEndpoint = endpoint
				p.reporter.CaptureRoutingRequest(endpoint, request)
			}
		},
	}

	if isTcpUpgrade(request) {
		handler.HandleTcpRequest(iter)
		return
	}

	if isWebSocketUpgrade(request) {
		handler.HandleWebSocketRequest(iter)
		return
	}

	proxyWriter := newProxyResponseWriter(responseWriter)
	roundTripper := &proxyRoundTripper{
		transport: p.transport,
		iter:      iter,
		handler:   &handler,

		after: func(rsp *http.Response, endpoint *route.Endpoint, err error) {
			accessLog.FirstByteAt = time.Now()
			if rsp != nil {
				accessLog.StatusCode = rsp.StatusCode
			}

			// disable keep-alives -- not needed with Go 1.3
			responseWriter.Header().Set("Connection", "close")

			if p.traceKey != "" && request.Header.Get(router_http.VcapTraceHeader) == p.traceKey {
				setTraceHeaders(responseWriter, p.ip, endpoint.CanonicalAddr())
			}

			latency := time.Since(startedAt)

			p.reporter.CaptureRoutingResponse(endpoint, rsp, startedAt, latency)

			if err != nil {
				p.reporter.CaptureBadGateway(request)
				handler.HandleBadGateway(err)
				proxyWriter.Done()
				return
			}

			if endpoint.PrivateInstanceId != "" {
				setupStickySession(responseWriter, rsp, endpoint)
			}
		},
	}
	proxyTransport := autowire.InstrumentedRoundTripper(roundTripper)

	p.newReverseProxy(proxyTransport, request).ServeHTTP(proxyWriter, request)

	accessLog.FinishedAt = time.Now()
	accessLog.BodyBytesSent = int64(proxyWriter.Size())
}