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package main
import (
"io"
"net/http"
"time"
"fmt"
"github.com/gorilla/mux"
)
func gameDownloader(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
game := vars["game"]
libMu.RLock()
g, ok := Lib.Games[game]
libMu.RUnlock()
if !ok {
Logger.Printf("Missing: %s", game)
http.Error(w, "Game is missing", 404)
return
}
w.Header().Add("Content-type", "application/tar")
w.Header().Add("Estimated-size", fmt.Sprintf("%d", g.Size))
Logger.Printf("Client %s is downloading: %s", r.RemoteAddr, game)
// Invert the writer so we can break up the copy and get progress
// information in here
rdr, pwrtr := io.Pipe()
go func() {
err := g.Package(pwrtr)
if err != nil {
Logger.Println("Error in package writing: ", err)
}
}()
var total int64
start := time.Now()
for {
n, err := io.CopyN(w, rdr, 256*1024*1024)
if err == io.EOF {
break
}
if err != nil {
Logger.Printf("Client %s Error Sending game: %s", r.RemoteAddr, err)
// Headers already sent, don't bother sending an error
return
}
total += n
mb := float64(total / 1024 / 1024)
rate := mb / time.Since(start).Seconds()
Logger.Printf("Client %s is downloading %s: %0.1f%% done %.2f mb/s",
r.RemoteAddr, game, float64(total)/float64(g.Size)*100, rate)
}
Logger.Printf("Client %s finished downloading: %s", r.RemoteAddr, game)
}
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