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package weed_server
import (
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/util"
"github.com/chrislusf/seaweedfs/weed/util/mem"
"io"
"math/rand"
"net/http"
)
var (
client *http.Client
)
func init() {
client = &http.Client{Transport: &http.Transport{
MaxIdleConns: 1024,
MaxIdleConnsPerHost: 1024,
}}
}
func (fs *FilerServer) proxyToVolumeServer(w http.ResponseWriter, r *http.Request, fileId string) {
urlStrings, err := fs.filer.MasterClient.GetLookupFileIdFunction()(fileId)
if err != nil {
glog.Errorf("locate %s: %v", fileId, err)
w.WriteHeader(http.StatusInternalServerError)
return
}
if len(urlStrings) == 0 {
w.WriteHeader(http.StatusNotFound)
return
}
proxyReq, err := http.NewRequest(r.Method, urlStrings[rand.Intn(len(urlStrings))], r.Body)
if err != nil {
glog.Errorf("NewRequest %s: %v", urlStrings[0], err)
w.WriteHeader(http.StatusInternalServerError)
return
}
proxyReq.Header.Set("Host", r.Host)
proxyReq.Header.Set("X-Forwarded-For", r.RemoteAddr)
for header, values := range r.Header {
for _, value := range values {
proxyReq.Header.Add(header, value)
}
}
proxyResponse, postErr := client.Do(proxyReq)
if postErr != nil {
glog.Errorf("post to filer: %v", postErr)
w.WriteHeader(http.StatusInternalServerError)
return
}
defer util.CloseResponse(proxyResponse)
for k, v := range proxyResponse.Header {
w.Header()[k] = v
}
w.WriteHeader(proxyResponse.StatusCode)
buf := mem.Allocate(128 * 1024)
defer mem.Free(buf)
io.CopyBuffer(w, proxyResponse.Body, buf)
}
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