func rangeFetch(C *RemoteChannel, req *event.HTTPRequestEvent, begin, end int64) (*event.HTTPResponseEvent, error) {
log.Printf("Session:%d range fetch %d-%d", req.GetId(), begin, end)
rangeReq := new(event.HTTPRequestEvent)
rangeReq.Headers = make(http.Header)
for k, v := range req.Headers {
rangeReq.Headers[k] = v
}
rangeReq.URL = req.URL
rangeReq.Method = req.Method
rangeReq.SetId(req.GetId())
rangeReq.Headers.Set("Range", fmt.Sprintf("bytes=%d-%d", begin, end))
ev, err := C.Request(rangeReq)
if nil == err {
res, ok := ev.(*event.HTTPResponseEvent)
if ok {
res.SetId(req.GetId())
if res.StatusCode == 302 {
location := res.Headers.Get("Location")
log.Printf("Range fetch:%s redirect to %s", rangeReq.URL, location)
rangeReq.URL = location
return rangeFetch(C, rangeReq, begin, end)
}
if res.StatusCode < 400 {
return res, nil
}
}
err = fmt.Errorf("Invalid response:%d %v for range fetch", res.StatusCode, res.Headers)
}
log.Printf("[ERROR]Failed to range fetch[%d-%d] for %s", begin, end, req.URL)
return nil, err
}
