/
utils.go
93 lines (74 loc) · 2.04 KB
/
utils.go
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package githttp
import (
"compress/flate"
"compress/gzip"
"fmt"
"io"
"net/http"
"strconv"
"strings"
"time"
)
// requestReader returns an io.ReadCloser
// that will decode data if needed, depending on the
// "content-encoding" header
func requestReader(req *http.Request) (io.ReadCloser, error) {
switch req.Header.Get("content-encoding") {
case "gzip":
return gzip.NewReader(req.Body)
case "deflate":
return flate.NewReader(req.Body), nil
}
// If no encoding, use raw body
return req.Body, nil
}
// HTTP parsing utility functions
func getServiceType(r *http.Request) string {
service_type := r.FormValue("service")
if s := strings.HasPrefix(service_type, "git-"); !s {
return ""
}
return strings.Replace(service_type, "git-", "", 1)
}
// HTTP error response handling functions
func renderMethodNotAllowed(w http.ResponseWriter, r *http.Request) {
if r.Proto == "HTTP/1.1" {
w.WriteHeader(http.StatusMethodNotAllowed)
w.Write([]byte("Method Not Allowed"))
} else {
w.WriteHeader(http.StatusBadRequest)
w.Write([]byte("Bad Request"))
}
}
func renderNotFound(w http.ResponseWriter) {
w.WriteHeader(http.StatusNotFound)
w.Write([]byte("Not Found"))
}
func renderNoAccess(w http.ResponseWriter) {
w.WriteHeader(http.StatusForbidden)
w.Write([]byte("Forbidden"))
}
// Packet-line handling function
func packetFlush() []byte {
return []byte("0000")
}
func packetWrite(str string) []byte {
s := strconv.FormatInt(int64(len(str)+4), 16)
if len(s)%4 != 0 {
s = strings.Repeat("0", 4-len(s)%4) + s
}
return []byte(s + str)
}
// Header writing functions
func hdrNocache(w http.ResponseWriter) {
w.Header().Set("Expires", "Fri, 01 Jan 1980 00:00:00 GMT")
w.Header().Set("Pragma", "no-cache")
w.Header().Set("Cache-Control", "no-cache, max-age=0, must-revalidate")
}
func hdrCacheForever(w http.ResponseWriter) {
now := time.Now().Unix()
expires := now + 31536000
w.Header().Set("Date", fmt.Sprintf("%d", now))
w.Header().Set("Expires", fmt.Sprintf("%d", expires))
w.Header().Set("Cache-Control", "public, max-age=31536000")
}