func (m *mp4Handler) RequestHandle(ctx context.Context, w http.ResponseWriter, r *http.Request) {
// Handle only GET requests with ContentLength of 0 without a Range header
if r.Method != "GET" || len(r.Header.Get("Range")) > 0 || r.ContentLength > 0 {
m.next.RequestHandle(ctx, w, r)
return
}
// parse the request
var start, err = strconv.Atoi(r.URL.Query().Get(startKey))
if err != nil || 0 >= start { // that start is not ok
m.next.RequestHandle(ctx, w, r)
return
}
var startTime = time.Duration(start) * time.Second
var newreq = copyRequest(r)
removeQueryArgument(newreq.URL, startKey)
var header = make(http.Header)
var rr = &rangeReader{
ctx: ctx,
req: copyRequest(newreq),
location: m.loc,
next: m.next,
callback: func(frw *httputils.FlexibleResponseWriter) bool {
if len(header) == 0 {
httputils.CopyHeadersWithout(frw.Header(), header, skipHeaders...)
} else {
return frw.Header().Get("Last-Modified") == header.Get("Last-Modified")
}
return true
},
}
var video *mp4.MP4
video, err = mp4.Decode(rr)
if err != nil {
m.loc.Logger.Errorf("error from the mp4.Decode - %s", err)
m.next.RequestHandle(ctx, w, r)
return
}
if video == nil || video.Moov == nil { // missing something?
m.next.RequestHandle(ctx, w, r)
return
}
cl, err := clip.New(video, startTime, rr)
if err != nil {
m.loc.Logger.Errorf("error while clipping a video(%+v) - %s", video, err)
m.next.RequestHandle(ctx, w, r)
return
}
httputils.CopyHeaders(header, w.Header())
w.Header().Set("Content-Length", strconv.FormatUint(cl.Size(), 10))
size, err := cl.WriteTo(w)
m.loc.Logger.Debugf("wrote %d", size)
if err != nil {
m.loc.Logger.Logf("error on writing the clip response - %s", err)
}
if uint64(size) != cl.Size() {
m.loc.Logger.Debugf("handler.mp4[%p]: expected to write %d but wrote %d", m, cl.Size(), size)
}
}
// Returns a new HTTP 1.1 request that has no body. It also clears headers like
// accept-encoding and rearranges the requested ranges so they match part
func (h *reqHandler) getNormalizedRequest() *http.Request {
url := *h.req.URL
result := &http.Request{
Method: h.req.Method,
URL: &url,
Proto: "HTTP/1.1",
ProtoMajor: 1,
ProtoMinor: 1,
Header: make(http.Header),
Host: h.req.Host,
}
httputils.CopyHeadersWithout(h.req.Header, result.Header, "Accept-Encoding")
//!TODO: fix requested range to be divisible by the storage partSize
return result
}
func (p *ReverseProxy) getOutRequest(rw http.ResponseWriter, req *http.Request, upstream types.Upstream) (*http.Request, error) {
outreq := new(http.Request)
*outreq = *req
url := *req.URL
outreq.URL = &url
outreq.Header = http.Header{}
httputils.CopyHeadersWithout(req.Header, outreq.Header, hopHeaders...)
outreq.Header.Set("User-Agent", p.Settings.UserAgent) // If we don't set it, Go sets it for us to something stupid...
outreq.Proto = "HTTP/1.1"
outreq.ProtoMajor = 1
outreq.ProtoMinor = 1
outreq.Close = false
upAddr, err := upstream.GetAddress(p.Settings.UpstreamHashPrefix + req.URL.RequestURI())
if err != nil {
return nil, fmt.Errorf("[%p] Proxy handler could not get an upstream address: %v", req, err)
}
p.Logger.Debugf("[%p] Using upstream %s (%s) to proxy request", req, upAddr, upAddr.OriginalURL)
outreq.URL.Scheme = upAddr.Scheme
outreq.URL.Host = upAddr.Host
// Set the correct host
if p.Settings.HostHeader != "" {
outreq.Host = p.Settings.HostHeader
} else if p.Settings.HostHeaderKeepOriginal {
if req.Host != "" {
outreq.Host = req.Host
} else {
outreq.Host = req.URL.Host
}
} else {
outreq.Host = upAddr.OriginalURL.Host
}
if closeNotifier, ok := rw.(http.CloseNotifier); ok {
reqDone := make(chan struct{})
defer close(reqDone)
clientGone := closeNotifier.CloseNotify()
outreq.Body = struct {
io.Reader
io.Closer
}{
Reader: &runOnFirstRead{
Reader: outreq.Body,
fn: func() {
go func() {
select {
case <-clientGone:
upstream.CancelRequest(outreq)
case <-reqDone:
}
}()
},
},
Closer: outreq.Body,
}
}
if clientIP, _, err := net.SplitHostPort(req.RemoteAddr); err == nil {
// If we aren't the first proxy retain prior
// X-Forwarded-For information as a comma+space
// separated list and fold multiple headers into one.
if prior, ok := outreq.Header["X-Forwarded-For"]; ok {
clientIP = strings.Join(prior, ", ") + ", " + clientIP
}
outreq.Header.Set("X-Forwarded-For", clientIP)
}
return outreq, nil
}
func (h *reqHandler) getResponseHook() func(*httputils.FlexibleResponseWriter) {
return func(rw *httputils.FlexibleResponseWriter) {
h.Logger.Debugf("[%p] Received headers for %s, sending them to client...", h.req, h.req.URL)
httputils.CopyHeadersWithout(rw.Headers, h.resp.Header(), hopHeaders...)
h.resp.WriteHeader(rw.Code)
isCacheable := cacheutils.IsResponseCacheable(rw.Code, rw.Headers)
if !isCacheable {
h.Logger.Debugf("[%p] Response is non-cacheable", h.req)
rw.BodyWriter = utils.AddCloser(h.resp)
return
}
expiresIn := cacheutils.ResponseExpiresIn(rw.Headers, h.CacheDefaultDuration)
if expiresIn <= 0 {
h.Logger.Debugf("[%p] Response expires in the past: %s", h.req, expiresIn)
rw.BodyWriter = utils.AddCloser(h.resp)
return
}
responseRange, err := httputils.GetResponseRange(rw.Code, rw.Headers)
if err != nil {
h.Logger.Debugf("[%p] Was not able to get response range (%s)", h.req, err)
rw.BodyWriter = utils.AddCloser(h.resp)
return
}
h.Logger.Debugf("[%p] Response is cacheable! Caching metadata and parts...", h.req)
code := rw.Code
if code == http.StatusPartialContent {
// 206 is returned only if the server would have returned 200 with a normal request
code = http.StatusOK
}
//!TODO: maybe call cached time.Now. See the comment in utils.IsMetadataFresh
now := time.Now()
obj := &types.ObjectMetadata{
ID: h.objID,
ResponseTimestamp: now.Unix(),
Code: code,
Size: responseRange.ObjSize,
Headers: make(http.Header),
ExpiresAt: now.Add(expiresIn).Unix(),
}
httputils.CopyHeadersWithout(rw.Headers, obj.Headers, metadataHeadersToFilter...)
if obj.Headers.Get("Date") == "" { // maybe the server does not return date, we should set it then
obj.Headers.Set("Date", now.Format(http.TimeFormat))
}
//!TODO: consult the cache algorithm whether to save the metadata
//!TODO: optimize this, save the metadata only when it's newer
//!TODO: also, error if we already have fresh metadata but the received metadata is different
if err := h.Cache.Storage.SaveMetadata(obj); err != nil {
h.Logger.Errorf("[%p] Could not save metadata for %s: %s", h.req, obj.ID, err)
rw.BodyWriter = utils.AddCloser(h.resp)
return
}
if h.req.Method == "HEAD" {
rw.BodyWriter = utils.AddCloser(h.resp)
return
}
rw.BodyWriter = utils.MultiWriteCloser(
utils.AddCloser(h.resp),
PartWriter(h.Cache, h.objID, *responseRange),
)
h.Logger.Debugf("[%p] Setting the cached data to expire in %s", h.req, expiresIn)
h.Cache.Scheduler.AddEvent(
h.objID.Hash(),
storage.GetExpirationHandler(h.Cache, h.Logger, h.objID),
expiresIn,
)
}
}