ajax - Inline support Chat implementation -

-

we creating live chat support system. if visitor clicks on live chat button, new window opens , user can talk their. trying accomplish open chat window inline link: http://anantgarg.com/chat/sampleb.php

please note building support chat system not peer chat system above link intends.

the problem facing here how we'll able access database located on different server (our server) , not on server our client's website located. above solution can work fine if on same server. so, please suggest on how overcome hurdle.

thanks.

i think, solve task may use websockets, support cross-domain connections.

in case, may write chat client side , place on cliet's website, request weill processed server db access.

extend

of course can use json websockets json ajax. websockets transport - json content passed transport.

i write code when reserarch websockets (chat lietn side):

function connect(){     var socket;     var host = window.location.host;     var wsurl = "ws://" + host + "/connect";      try{         var socket = new websocket(wsurl);         message('<p class="event">socket status: '+socket.readystate);         socket.onopen = function(){             message('<p class="event">socket status: '+socket.readystate+' (open)');             //run "ping-pong" support connection             settimeout(pingpong, 5000);         }          socket.onmessage = function(msg){             //parse server answer string json object             var answer = json.parse(msg.data);             if (answer.type == 'message') {                 message('<p class="message">'+answer.user+': '+answer.message);             }         }          socket.onclose = function(){             message('<p class="event">socket status: '+socket.readystate+' (closed)');         }                 } catch(exception){         message('<p>error'+exception);     }      function send(){         var text = $('#text').val();         if(text==""){             message('<p class="warning">please enter message');             return ;             }         try{             //send data via json             socket.send('{"type": "message", "message":'+json.stringify(text)+'}');         } catch(exception){             message('<p class="warning">');         }         $('#text').val("");     }     var token = 0;     function pingpong()     {         token++;         try{             var msg = {'type': 'ping', 'token': token};             socket.send(json.stringify(msg));             settimeout(pingpong, 5000);         } catch(exception){             message('<p class="warning">');         }      }      function message(msg){         $('#chatlog').append(msg+'</p>');     }//end message()      $('#text').keypress(function(event) {               if (event.keycode == '13') {                  send();                }     });       $('#disconnect').click(function(){         socket.close();     });  }   $(document).ready(function() {      if(!("websocket" in window)){         $('#chatlog, input, button, #examples').fadeout("fast");             $('<p>oh no, need browser supports websockets. how <a href="http://www.google.com/chrome">google chrome</a>?</p>').appendto('#container');          }else{         //the user has websockets         connect();     } }); </script> <meta charset=utf-8 /> <style type="text/css"> body{font-family:arial, helvetica, sans-serif;} #container{     border:5px solid grey;     width:800px;     margin:0 auto;     padding:10px; } #chatlog{     padding:5px;     border:1px solid black;  } #chatlog p{margin:0;} .event{color:#999;} .warning{     font-weight:bold;     color:#ccc; } </style> <title>websockets client</title>  </head> <body>   <div id="wrapper">      <div id="container">          <h1>websockets client</h1>          <div id="chatlog">          </div>         <p id="examples">e.g. try 'hi', 'name', 'age', 'today'</p>          <input id="text" type="text" />         <button id="disconnect">disconnect</button>      </div>    </div> </body> </html>​

also can use socketio library it, dont sure cross-domain work.


Comments

Post a Comment

Popular posts from this blog

java - Jmockit String final length method mocking Issue -

-
using jmockit 1.2 jar, trying mock string's length method getting unexpected invocation exception: failed: test java.lang.illegalstateexception: missing invocation mocked type @ point; please make sure such invocations appear after declaration of suitable mock field or parameter @ stringdemo.testa$1.<init>(testa.java:17) @ stringdemo.testa.test(testa.java:13) i using testng: @test public void test() throws exception { new expectations() { @mocked("length") string astring; { astring.length(); result = 2; } }; system.out.println(a.showa("test")); } } actual class a: public class { public static int showa(string str){ int a= str.length(); return a; } } this wrong way of recording expected results. shouldn't mock , record string's length() method, record showa() instead. here solution @suppresswarnings("unused...
Read more

What is the difference between data design and data model(ERD) -

-
i have google question , find answer in day. know, data design many many table have list column,and mark pk , fk. why er-diagram have find this? data design process of designing database. main output of data design detailed logical data model of database. some people data design includes of needed logical , physical design choices , physical storage parameters needed generate design in data definition language. technically, database analysis, database analysts (dbas) trained do. while person can both data design , database analysis, these 2 different tasks. data design models data. database analysis takes model , applies 1 or more database engines (relational, hierarchical, nosql). a logical data model 1 of main outputs of data design. data model represented entity relationship diagram, or er diagram.
Read more

ios - Can NSManagedObject conform to NSCoding -

-
i need transfer single object across device. right converting nsmanagedobject dictionary , archiving , sending nsdata. upon receiving unarchiving it. transfer nsmanagedobject archiving , unarchiving instead of creating intermediate data object. @interface test : nsmanagedobject<nscoding> @property (nonatomic, retain) nsstring * title; @end @implementation test @dynamic title; - (id)initwithcoder:(nscoder *)coder { self = [super init]; if (self) { self.title = [coder decodeobjectforkey:@"title"]; //<crash } return self; } - (void)encodewithcoder:(nscoder *)coder { [coder encodeobject:self.title forkey:@"title"]; } @end nsdata *archivedobjects = [nskeyedarchiver archiveddatawithrootobject:testobj]; nsdata *objectsdata = archivedobjects; if ([objectsdata length] > 0) { nsarray *objects = [nskeyedunarchiver unarchiveobjectwithdata:objectsdata]; } the problem above code is. crashes @ self.title in initwithcoder sa...
Read more