Пример #1
0
func (sbf *StringBodyFilter) FilterRequest(request *falcore.Request) *http.Response {
	req := request.HttpRequest
	// This caches the request body so that multiple filters can iterate it
	if req.Method == "POST" || req.Method == "PUT" {
		sb, err := sbf.readRequestBody(req)
		if sb == nil || err != nil {
			request.CurrentStage.Status = 3 // Skip
			falcore.Debug("%s No Req Body or Ignored: %v", request.ID, err)
		}
	} else {
		request.CurrentStage.Status = 1 // Skip
	}
	return nil
}
Пример #2
0
func (f *FileFilter) FilterRequest(req *falcore.Request) (res *http.Response) {
	// Clean asset path
	asset_path := filepath.Clean(filepath.FromSlash(req.HttpRequest.URL.Path))

	// Resolve PathPrefix
	if strings.HasPrefix(asset_path, f.PathPrefix) {
		asset_path = asset_path[len(f.PathPrefix):]
	} else {
		falcore.Debug("%v doesn't match prefix %v", asset_path, f.PathPrefix)
		res = falcore.StringResponse(req.HttpRequest, 404, nil, "Not found.")
		return
	}

	// Resolve FSBase
	if f.BasePath != "" {
		asset_path = filepath.Join(f.BasePath, asset_path)
	} else {
		falcore.Error("file_filter requires a BasePath")
		return falcore.StringResponse(req.HttpRequest, 500, nil, "Server Error\n")
	}

	// Open File
	if file, err := os.Open(asset_path); err == nil {
		// Make sure it's an actual file
		if stat, err := file.Stat(); err == nil && stat.Mode()&os.ModeType == 0 {
			res = &http.Response{
				Request:       req.HttpRequest,
				StatusCode:    200,
				Proto:         "HTTP/1.1",
				ProtoMajor:    1,
				ProtoMinor:    1,
				Body:          file,
				Header:        make(http.Header),
				ContentLength: stat.Size(),
			}
			if ct := mime.TypeByExtension(filepath.Ext(asset_path)); ct != "" {
				res.Header.Set("Content-Type", ct)
			}
		} else {
			file.Close()
		}
	} else {
		falcore.Finest("Can't open %v: %v", asset_path, err)
	}
	return
}
Пример #3
0
func (u *Upstream) FilterRequest(request *falcore.Request) (res *http.Response) {
	var err error
	req := request.HttpRequest

	if u.Name != "" {
		request.CurrentStage.Name = fmt.Sprintf("%s[%s]", request.CurrentStage.Name, u.Name)
	}

	// Throttle
	// Wait for an opening, then increment in flight counter
	u.throttleC.L.Lock()
	u.throttleQueue += 1
	for u.throttleMax > 0 && u.throttleInFlight >= u.throttleMax {
		u.throttleC.Wait()
	}
	u.throttleQueue -= 1
	u.throttleInFlight += 1
	u.throttleC.L.Unlock()
	// Decrement and signal when done
	defer func() {
		u.throttleC.L.Lock()
		u.throttleInFlight -= 1
		u.throttleC.Signal()
		u.throttleC.L.Unlock()
	}()

	// Force the upstream to use http
	if u.ForceHttp || req.URL.Scheme == "" {
		req.URL.Scheme = "http"
		req.URL.Host = req.Host
	}
	before := time.Now()
	req.Header.Set("Connection", "Keep-Alive")
	var upstrRes *http.Response
	upstrRes, err = u.Transport.transport.RoundTrip(req)
	diff := falcore.TimeDiff(before, time.Now())
	if err == nil {
		// Copy response over to new record.  Remove connection noise.  Add some sanity.
		res = falcore.StringResponse(req, upstrRes.StatusCode, nil, "")
		if upstrRes.ContentLength > 0 {
			res.ContentLength = upstrRes.ContentLength
			res.Body = upstrRes.Body
		} else if res.ContentLength == -1 {
			res.Body = upstrRes.Body
			res.ContentLength = -1
			res.TransferEncoding = []string{"chunked"}
		} else {
			// Any bytes?
			var testBuf [1]byte
			n, _ := io.ReadFull(upstrRes.Body, testBuf[:])
			if n == 1 {
				// Yes there are.  Chunked it is.
				res.TransferEncoding = []string{"chunked"}
				res.ContentLength = -1
				rc := &passThruReadCloser{
					io.MultiReader(bytes.NewBuffer(testBuf[:]), upstrRes.Body),
					upstrRes.Body,
				}

				res.Body = rc
			} else {
				// There was an error reading the body
				upstrRes.Body.Close()
				res.ContentLength = 0
				res.Body = nil
			}
		}
		// Copy over headers with a few exceptions
		res.Header = make(http.Header)
		for hn, hv := range upstrRes.Header {
			switch hn {
			case "Content-Length":
			case "Connection":
			case "Transfer-Encoding":
			default:
				res.Header[hn] = hv
			}
		}
	} else {
		if nerr, ok := err.(net.Error); ok && nerr.Timeout() {
			falcore.Error("%s [%s] Upstream Timeout error: %v", request.ID, u.Name, err)
			res = falcore.StringResponse(req, 504, nil, "Gateway Timeout\n")
			request.CurrentStage.Status = 2 // Fail
		} else {
			falcore.Error("%s [%s] Upstream error: %v", request.ID, u.Name, err)
			res = falcore.StringResponse(req, 502, nil, "Bad Gateway\n")
			request.CurrentStage.Status = 2 // Fail
		}
	}
	falcore.Debug("%s %s [%s] [%s] %s s=%d Time=%.4f", request.ID, u.Name, req.Method, u.Transport.host, req.URL, res.StatusCode, diff)
	return
}