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
}
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
}
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
}
