CAN-binder/low-can-demo/app/Frontend/js/AFB.js

   1 AFB = function(base, initialtoken){
   2
   3 var urlws = "ws://"+window.location.host+"/"+base;
   4 var urlhttp = "http://"+window.location.host+"/"+base;
   5
   6 /*********************************************/
   7 /****                                     ****/
   8 /****             AFB_context             ****/
   9 /****                                     ****/
  10 /*********************************************/
  11 var AFB_context = (function() {
  12         var UUID;
  13         var TOKEN = initialtoken;
  14
  15         var context = function(token, uuid) {
  16                 this.token = token;
  17                 this.uuid = uuid;
  18         };
  19
  20         context.prototype = {
  21                 get token() {return TOKEN;},
  22                 set token(tok) {if(tok) TOKEN=tok;},
  23                 get uuid() {return UUID;},
  24                 set uuid(id) {if(id) UUID=id;}
  25         };
  26
  27         return new context();
  28 })();
  29 /*********************************************/
  30 /****                                     ****/
  31 /****             AFB_websocket           ****/
  32 /****                                     ****/
  33 /*********************************************/
  34 var AFB_websocket = (function() {
  35         var CALL = 2;
  36         var RETOK = 3;
  37         var RETERR = 4;
  38         var EVENT = 5;
  39
  40         var PROTO1 = "x-afb-ws-json1";
  41
  42         var result = function(onopen, onabort) {
  43                 var u = urlws;
  44                 if (AFB_context.token) {
  45                         u = u + '?x-afb-token=' + AFB_context.token;
  46                         if (AFB_context.uuid)
  47                                 u = u + '&x-afb-uuid=' + AFB_context.uuid;
  48                 }
  49                 this.ws = new WebSocket(u, [ PROTO1 ]);
  50                 this.pendings = {};
  51                 this.awaitens = {};
  52                 this.counter = 0;
  53                 this.ws.onopen = onopen.bind(this);
  54                 this.ws.onerror = onerror.bind(this);
  55                 this.ws.onclose = onclose.bind(this);
  56                 this.ws.onmessage = onmessage.bind(this);
  57                 this.onopen = onopen;
  58                 this.onabort = onabort;
  59         };
  60
  61         function onerror(event) {
  62                 var f = this.onabort;
  63                 if (f) {
  64                         delete this.onopen;
  65                         delete this.onabort;
  66                         f && f(this);
  67                 }
  68                 this.onerror && this.onerror(this);
  69         }
  70
  71         function onopen(event) {
  72                 var f = this.onopen;
  73                 delete this.onopen;
  74                 delete this.onabort;
  75                 f && f(this);
  76         }
  77
  78         function onclose(event) {
  79                 for (var id in this.pendings) {
  80                         var ferr = this.pendings[id].onerror;
  81                         ferr && ferr(null, this);
  82                 }
  83                 this.pendings = {};
  84                 this.onclose && this.onclose();
  85         }
  86
  87         function fire(awaitens, name, data) {
  88                 var a = awaitens[name];
  89                 if (a)
  90                         a.forEach(function(handler){handler(data);});
  91                 var i = name.indexOf("/");
  92                 if (i >= 0) {
  93                         a = awaitens[name.substring(0,i)];
  94                         if (a)
  95                                 a.forEach(function(handler){handler(data);});
  96                 }
  97                 a = awaitens["*"];
  98                 if (a)
  99                         a.forEach(function(handler){handler(data);});
 100         }
 101
 102         function reply(pendings, id, ans, offset) {
 103                 if (id in pendings) {
 104                         var p = pendings[id];
 105                         delete pendings[id];
 106                         var f = p[offset];
 107                         f && f(ans);
 108                 }
 109         }
 110
 111         function onmessage(event) {
 112                 var obj = JSON.parse(event.data);
 113                 var code = obj[0];
 114                 var id = obj[1];
 115                 var ans = obj[2];
 116                 AFB_context.token = obj[3];
 117                 switch (code) {
 118                 case RETOK:
 119                         reply(this.pendings, id, ans, 0);
 120                         break;
 121                 case RETERR:
 122                         reply(this.pendings, id, ans, 1);
 123                         break;
 124                 case EVENT:
 125                 default:
 126                         fire(this.awaitens, id, ans);
 127                         break;
 128                 }
 129         }
 130
 131         function close() {
 132                 this.ws.close();
 133         }
 134
 135         function call(method, request, onsuccess, onfailure) {
 136                 var id, arr;
 137                 do {
 138                         id = String(this.counter = 4095 & (this.counter + 1));
 139                 } while (id in this.pendings);
 140                 this.pendings[id] = [ onsuccess, onfailure ];
 141                 arr = [CALL, id, method, request ];
 142                 if (AFB_context.token) arr.push(AFB_context.token);
 143                 this.ws.send(JSON.stringify(arr));
 144         }
 145
 146         function onevent(name, handler) {
 147                 var id = name;
 148                 var list = this.awaitens[id] || (this.awaitens[id] = []);
 149                 list.push(handler);
 150         }
 151
 152         result.prototype = {
 153                 close: close,
 154                 call: call,
 155                 onevent: onevent
 156         };
 157
 158         return result;
 159 })();
 160 /*********************************************/
 161 /****                                     ****/
 162 /****                                     ****/
 163 /****                                     ****/
 164 /*********************************************/
 165 return {
 166         context: AFB_context,
 167         ws: AFB_websocket
 168 };
 169 };
 170