reorder to try to use go modules

get.go

@@ -0,0 +1,42 @@
+package pathway
+
+import (
+	"io"
+	"net/http"
+	"sync/atomic"
+)
+
+func handleGet(pathID string, w http.ResponseWriter, r *http.Request) {
+	queue := &Queue{ch: make(chan Transfer)}
+	if p, loaded := paths.LoadOrStore(pathID, queue); loaded {
+		queue = p.(*Queue)
+		debug("%s [GET] Loads path", pathID)
+	} else {
+		debug("%s [GET] Created path", pathID)
+	}
+	atomic.AddInt32(&queue.gets, 1)
+
+	select {
+	case transfer := <-queue.ch:
+		debug("%s [GET] Reads from path", pathID)
+		if transfer.contentlength != "" {
+			w.Header().Set("Content-Length", transfer.contentlength)
+		}
+		_, err := io.Copy(w, transfer.reader)
+		if err != nil {
+			transfer.reader.Close()
+		}
+		debug("%s [GET] Sends done", pathID)
+		close(transfer.done)
+	case <-r.Context().Done():
+		debug("%s [GET] Cancels path", pathID)
+	}
+
+	if atomic.AddInt32(&queue.gets, -1) <= 0 {
+		if atomic.LoadInt32(&queue.posts) <= 0 {
+			paths.Delete(pathID)
+			debug("%s [GET] Removes path", pathID)
+		}
+	}
+	info("%s [GET] Finishes", pathID)
+}