Leave out the anonymous nick reminders for now

[reliable-chat] / server / server.go

diff --git a/server/server.go b/server/server.go
index bfe10669e7f0bd34368984dffbde1c7fe8adcd55..1bb7c9af81935b417692ddc55b717a2ff8f4967e 100644 (file)
--- a/server/server.go
+++ b/server/server.go
@@ -1,13 +1,42 @@
+/*  reliable-chat - multipath chat
+ *  Copyright (C) 2012  Scott Worley <sworley@chkno.net>
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Affero General Public License as
+ *  published by the Free Software Foundation, either version 3 of the
+ *  License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Affero General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Affero General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+

 package main
 
 import "container/list"
 import "encoding/json"
 package main
 
 import "container/list"
 import "encoding/json"

+import "expvar"
+import "flag"

 import "log"
 import "net/http"
 import "log"
 import "net/http"

+import "strconv"

 import "time"
 
 import "time"
 

+var port = flag.Int("port", 21059, "Port to listen on")
+
+var frame_count = expvar.NewInt("frame_count")
+var speak_count = expvar.NewInt("speak_count")
+var fetch_count = expvar.NewInt("fetch_count")
+var fetch_wait_count = expvar.NewInt("fetch_wait_count")
+var fetch_wake_count = expvar.NewInt("fetch_wake_count")
+

 type Message struct {
        Time time.Time
 type Message struct {
        Time time.Time

+       ID   string

        Text string
 }
 
        Text string
 }
 


@@ -28,23 +57,34 @@ func manage_store(store Store) {
        message_count := 0
        max_messages := 1000
        waiting := list.New()
        message_count := 0
        max_messages := 1000
        waiting := list.New()

+main:

        for {
                select {
        for {
                select {

-               case new_message := <-store.Add:
-                       messages.PushBack(new_message)
+               case new_message, ok := <-store.Add:
+                       if !ok {
+                               break main
+                       }
+                       speak_count.Add(1)

                        for waiter := waiting.Front(); waiter != nil; waiter = waiter.Next() {
                                waiter.Value.(*StoreRequest).Messages <- []Message{*new_message}
                                close(waiter.Value.(*StoreRequest).Messages)
                        for waiter := waiting.Front(); waiter != nil; waiter = waiter.Next() {
                                waiter.Value.(*StoreRequest).Messages <- []Message{*new_message}
                                close(waiter.Value.(*StoreRequest).Messages)

+                               fetch_wake_count.Add(1)

                        }
                        waiting.Init()
                        }
                        waiting.Init()

+                       messages.PushBack(new_message)

                        if message_count < max_messages {
                                message_count++
                        } else {
                                messages.Remove(messages.Front())
                        }
                        if message_count < max_messages {
                                message_count++
                        } else {
                                messages.Remove(messages.Front())
                        }

-               case request := <-store.Get:
+               case request, ok := <-store.Get:
+                       if !ok {
+                               break main
+                       }
+                       fetch_count.Add(1)

                        if messages.Back() == nil || !request.StartTime.Before(messages.Back().Value.(*Message).Time) {
                                waiting.PushBack(request)
                        if messages.Back() == nil || !request.StartTime.Before(messages.Back().Value.(*Message).Time) {
                                waiting.PushBack(request)

+                               fetch_wait_count.Add(1)

                        } else {
                                start := messages.Back()
                                response_size := 1
                        } else {
                                start := messages.Back()
                                response_size := 1


@@ -73,6 +113,49 @@ func start_store() Store {
        return store
 }
 
        return store
 }
 

+const frame_html = `<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
+  "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
+
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+ <script type="text/javascript"><!--//--><![CDATA[//><!--
+  var since;
+  window.parent.postMessage('[{"Time":"2000-01-01T00:00:00.000000-00:00","ID":"/frame deprecation warning","Text":"*** You are using an old version of the client.  Please upgrade."}]', "*");
+  function go() {
+   var delay = 10000;
+   var xhr = new XMLHttpRequest();
+   xhr.onreadystatechange = function() {
+    if (this.readyState == this.DONE) {
+     if (this.status == 200) {
+      var rtxt = this.responseText;
+      if (rtxt != null) {
+       var r = JSON.parse(rtxt);
+       if (r != null) {
+        window.parent.postMessage(rtxt, "*");
+        delay = 40;
+        if (r.length >= 1 && "Time" in r[r.length-1]) {
+         since = r[r.length-1]["Time"];
+        }
+       }
+      }
+     }
+     window.setTimeout(go, delay);
+    }
+   }
+   var uri = "/fetch";
+   if (since) {
+    uri += '?since="' + since + '"';
+   }
+   xhr.open("GET", uri);
+   xhr.send();
+  }
+  //--><!]]></script>
+</head>
+<body onload="go()">
+</body>
+</html>
+`
+

 func start_server(store Store) {
        http.HandleFunc("/fetch", func(w http.ResponseWriter, r *http.Request) {
                var since time.Time
 func start_server(store Store) {
        http.HandleFunc("/fetch", func(w http.ResponseWriter, r *http.Request) {
                var since time.Time


@@ -96,17 +179,27 @@ func start_server(store Store) {
                        return
                }
                w.Header().Add("Content-Type", "application/json")
                        return
                }
                w.Header().Add("Content-Type", "application/json")

+               w.Header().Add("Access-Control-Allow-Origin", "*")

                w.Write(json_encoded)
        })
 
        http.HandleFunc("/speak", func(w http.ResponseWriter, r *http.Request) {
                w.Write(json_encoded)
        })
 
        http.HandleFunc("/speak", func(w http.ResponseWriter, r *http.Request) {

-               store.Add <- &Message{time.Now(), r.FormValue("text")}
+               store.Add <- &Message{
+                       time.Now(),
+                       r.FormValue("id"),
+                       r.FormValue("text")}
+       })
+
+       http.HandleFunc("/frame", func(w http.ResponseWriter, r *http.Request) {
+               frame_count.Add(1)
+               w.Write([]byte(frame_html));

        })
 
        })
 

-       log.Fatal(http.ListenAndServe(":8080", nil))
+       log.Fatal(http.ListenAndServe(":"+strconv.Itoa(*port), nil))

 }
 
 func main() {
 }
 
 func main() {

+       flag.Parse()

        store := start_store()
        start_server(store)
 }
        store := start_store()
        start_server(store)
 }