func ServerError(w http.ResponseWriter, r *http.Request) {
SetCacheControl(w, CacheNoStore, -1)
c := appengine.NewContext(r)
requestID := appengine.RequestID(c)
http.Error(w, fmt.Sprintf("There was an internal server error while processing your request. Administrators have been notified.\nRequest ID: %s", requestID), http.StatusInternalServerError)
}
func aboutPage(w http.ResponseWriter, r *http.Request) {
c := appengine.NewContext(r)
fmt.Fprintf(w, "<h1>%v</h1>", appengine.DefaultVersionHostname(c))
token, expire, _ := appengine.AccessToken(c, "test")
fmt.Fprintf(w, "<p>AccessToken: %v %v", token, expire)
fmt.Fprintf(w, "<p>AppID: %v", appengine.AppID(c))
fmt.Fprintf(w, "<p>FQAppID: %v", c.FullyQualifiedAppID())
fmt.Fprintf(w, "<p>Go version: %v", runtime.Version())
fmt.Fprintf(w, "<p>Datacenter: %v", appengine.Datacenter())
fmt.Fprintf(w, "<p>InstanceID: %v", appengine.InstanceID())
fmt.Fprintf(w, "<p>IsDevAppServer: %v", appengine.IsDevAppServer())
fmt.Fprintf(w, "<p>RequestID: %v", appengine.RequestID(c))
fmt.Fprintf(w, "<p>ServerSoftware: %v", appengine.ServerSoftware())
sa, _ := appengine.ServiceAccount(c)
fmt.Fprintf(w, "<p>ServiceAccount: %v", sa)
keyname, signed, _ := appengine.SignBytes(c, []byte("test"))
fmt.Fprintf(w, "<p>SignBytes: %v %v", keyname, signed)
fmt.Fprintf(w, "<p>VersionID: %v", appengine.VersionID(c))
fmt.Fprintf(w, "<p>Request: %v", r)
r2 := c.Request()
fmt.Fprintf(w, "<p>Context Request type/value: %T %v", r2, r2)
}
// AppEngineLogCtx returns a goa middleware that sets the appengine context in the log records.
func AppEngineLogCtx() goa.Middleware {
return func(h goa.Handler) goa.Handler {
return func(ctx *goa.Context) error {
actx := appengine.NewContext(ctx.Request())
ctx.SetValue(goa.ReqIDKey, appengine.RequestID(actx))
ctx.Logger = ctx.Logger.New("aeCtx", actx)
return h(ctx)
}
}
}
func CreateHandler(handlerFunc func(appengine.Context, http.ResponseWriter, *http.Request)) appstats.Handler {
return appstats.NewHandler(func(c appengine.Context, w http.ResponseWriter, r *http.Request) {
headers := w.Header()
headers.Set("X-Frame-Options", "SAMEORIGIN")
headers.Set("X-XSS-Protection", "0")
c.Infof("Request ID: %s", appengine.RequestID(c))
handlerFunc(c, w, r)
})
}
// Handler function for /nonce
func handleGetNonce(w http.ResponseWriter, r *http.Request) {
c := appengine.NewContext(r)
hash := md5.New()
now := time.Now()
fmt.Fprintf(hash, "%v%v", appengine.RequestID(c), now.UnixNano())
nonce := fmt.Sprintf("%x", hash.Sum(make([]byte, 0, 16)))
obj := &Nonce{
now,
now.Add(180 * time.Second),
r.UserAgent(),
r.RemoteAddr}
err := datastore.RunInTransaction(c, func(c appengine.Context) error {
_, err := datastore.Put(c, NonceKey(c, nonce), obj)
return err
}, nil)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
w.Header().Set("Content-Type", "text/plain")
// Make _really_ sure this is not cached
w.Header().Set("Cache-Control", "no-cache, no-store, must-revalidate")
w.Header().Set("Pragma", "no-cache")
w.Header().Set("Expires", "0")
w.Write([]byte(nonce))
go func() {
// Delete expired nonces of a different shard
if err := deleteExpired(c, now, nonceShardKey(c, nonce[2:])); err != nil {
c.Warningf("deleteExpired failed: %v", err)
}
}()
}
func RequestID(ctx netcontext.Context) string { return appengine.RequestID(fromContext(ctx)) }