《基于Node.js实现简易聊天室系列之详细设计》
一个完整的项目基本分为三个部分：前端、后台和数据库。依照软件工程的理论知识，应该依次按照以下几个步骤：需求分析、概要设计、详细设计、编码、测试等。由于缺乏相关知识的储备，导致这个Demo系列的文章层次不是很清楚，索性这一章将所有的过程（前后端以及数据库）做一个介绍，下一章写完总结就OK了吧。
（1）前端部分
涉及到的技术：html、css、bootstrap、jquery、jquery UI
登录/注册界面使用的是bootstrap响应式布局，即支持不同尺寸的客户端，以此提高用户的体验。在这之前我以为聊天室比较适合做成SPA（单页应用），想采取backbone，但是结合毕设的主题是基于Node.js，如果采用backbone，路由功能就有两种选择，backbone和Node.js都有着丰富的路由API，由于之前没有用Node.js做过相关项目，所以就放弃了backbone。Demo通过改变css中display的属性来控制div的显示与隐藏。
页面：
1 <div> 2 <div class="container"> 3 <div class="row"> 4 <div class="col-sm-5 col-md-5"> 5 <div id="loginBox"> 6 <form id="signinForm" class="form-signin" role="form" onsubmit="return false;"> 7 <h2 class="form-signin-heading">Sign in</h2> 8 <input id="username" type="text" class="form-control" placeholder="Username" required="" autofocus=""> 9 <input id="userpassword" type="password" class="form-control" placeholder="Password" required=""> 10 <button id="loginBtn" class="btn btn-lg btn-primary btn-block">Sign in</button> 11 </form> 12 <p id="SignInErr"></p> 13 </div> 14 </div> 15 <div class="col-sm-2 col-md-2"> 16 <div class="text-center"><br><br> 17 <h1>Or</h1> 18 </div> 19 </div> 20 <div class="col-sm-5 col-md-5"> 21 <div id="signupBox"> 22 <form id="signupForm" class="form-signin" role="form" onsubmit="return false;"> 23 <h2 class="form-signin-heading">Sign up</h2> 24 <input id="upName" type="text" maxlength="5" class="form-control" placeholder="Username" required="" /> 25 <input id="upPassword" type="password" maxlength="6" class="form-control" placeholder="Password" required="" /> 26 <button id="signupBtn" class="btn btn-lg btn-primary btn-block">Sign up</button> 27 </form> 28 <p id="SignUpErr"></p> 29 </div> 30 </div> 31 </div> 32 </div> 33 <div id="main" class="hidden"> 34 <div id="sideBar"> 35 <div id="userInfo"> 36 <img class="headImg" /> 37 <span id="weather"></span> 38 </div> 39 <hr style="margin:0;"> 40 <div id="control"> 41 <div> 42 <span id="gloableName"></span> 43 <br> 44 <em></em> 45 </div> 46 <hr> 47 <ul> 48 <li id="set"><i class="glyphicon glyphicon-cog"></i> Setting</li> 49 <li id="changeUser"><i class="glyphicon glyphicon-transfer"></i> Switch</li> 50 <li id="layout"><i class="glyphicon glyphicon-off"></i> Layout</li> 51 </ul> 52 </div> 53 <ul id="setContent" style="display: none"> 54 <li><i class="glyphicon glyphicon-eye-close"></i><em> Update Password</em></li> 55 <li><i class="glyphicon glyphicon-tags"></i><em> Personal Sign</em></li> 56 <li><i class="glyphicon glyphicon-user"></i><em> Head Portrait </em></li> 57 </ul> 58 <div id="setOne" style="display:none;"> 59 <input type="password" placeholder="Old Password" maxlength="6" id="oldpass" /> 60 <input type="password" placeholder="New Password" maxlength="6" id="newpass" /> 61 <p></p> 62 </div> 63 <div id="setTwo" style="display: none;"> 64 <input type="text" placeholder="write something will well" maxlength="16" /> 65 <p></p> 66 </div> 67 <div id="setThree" style="display:none;"> 68 <p>*Double click the picture to select</p> 69 <div id="imgContent"> 70 <ul> 71 </ul> 72 </div> 73 </div> 74 <div id="chatChange"> 75 <ul id="selectmenu"> 76 <li>Square</li> 77 <li>Choose Room</li> 78 <ul id="selectRoom" style="display: none;"> 79 <li><img src="/img/firsthead.jpg" alt="" /><span>The Legend of Qin</span></li> 80 <li><img src="/img/secondhead.jpg" alt=""><span>Naruto</span></li> 81 </ul> 82 </ul> 83 84 <div> 85 </div> 86 </div> 87 </div> 88 <div id="chatBox"> 89 <div id="headmessages"><strong>Square</strong></div> 90 <div id="content"> 91 <ul id="messages"></ul> 92 </div> 93 <div id="chatbottom"> 94 <div> 95 <span class="emotion" title="插入表情"><i class="glyphicon glyphicon-picture"></i></span> 96 <span id="clear" title="清空聊天窗口"><i class="glyphicon glyphicon-refresh"></i></span> 97 <span id="chatRecord" title="聊天历史消息"><i class="glyphicon glyphicon-time"></i></span> 98 </div> 99 <form id="chatMsgForm" onsubmit="return false;"> 100 <textarea id="msg" rows="5" cols="35" maxlength="161" placeholder="Enter the content here, you can enter 161 characters at most ~"> 101 </textarea> 102 <button id="send" class="btn btn-default"><i class="glyphicon glyphicon-send"></i></button> 103 </form> 104 </div> 105 </div> 106 <div id="model"> 107 </div> 108 <div id="rightSide"> 109 <span id="membersTitle">Members Information</span> 110 <div id="Allmembers"> 111 <div> 112 <i></i> 113 <span>All Members</span> 114 <span id="oncount"></span>/<span id="allcount"></span> 115 </div> 116 <ul id="AllOnline"></ul> 117 <ul id="AllOutline"></ul> 118 </div> 119 <div id="Roommembers"> 120 <div> 121 <i></i> 122 <span>Room Members</span> 123 <span id="roomCount"></span> 124 </div> 125 <ul> 126 </ul> 127 </div> 128 </div> 129 <div id="oldMsg" style="display: none;"> 130 <span id="oldMsgHead" title="关闭历史消息窗口"><i class="glyphicon glyphicon-arrow-left"></i> MsgHistory</span> 131 <ul></ul> 132 <span id="clearoldMsg"><i title="清空聊天历史消息" class="glyphicon glyphicon-trash"></i></span> 133 </div> 134 </div> 135 </div> 136 </div> 137 <script src="/socket.io/socket.io.js"></script> 138 <script src="/js/jquery.js"></script> 139 <script src="/js/jquery-ui.min.js"></script> 140 <script src="/js/app.js"></script> 141 <script src="/js/jquery.qqFace.js"></script>
js：
1 $(function () { 2 var CookieObj = {}, socket = io(), headInfo = "群聊 (";; 3 window.onbeforeunload = function (e) { 4 if (document.cookie) return false; 5 } 6 render(); 7 /* 8 *登录 9 */ 10 var onLogin = function (e) { 11 var xhr; 12 if (!$('#username').val() || !$('#userpassword').val()) return; 13 xhr = $.ajax({ 14 url: '/login', 15 type: 'POST', 16 dataType: 'json', 17 data: { 18 name: $('#username').val(), 19 password: $('#userpassword').val() 20 } 21 }) 22 .done(function (data, textStatus, jqXHR) { 23 if (data.value === 'Y') { 24 render(); 25 } else { 26 $('#SignInErr').html(data.msg); 27 } 28 }) 29 .fail(function (jqXHR, textStatus, errorThrown) { 30 $('#SignInErr').html('Error occured! Please try again.'); 31 }); 32 }; 33 /* 34 *注册 35 */ 36 var onSignup = function (e) { 37 var xhr; 38 if (!$('#upName').val() || !$('#upPassword').val()) return; 39 xhr = $.ajax({ 40 url: '/signup', 41 type: 'POST', 42 dataType: 'json', 43 data: { 44 name: $('#upName').val(), 45 password: $('#upPassword').val() 46 } 47 }) 48 .done(function (data, textStatus, jqXHR) { 49 if (data.value === 'Y') { 50 $('#SignUpErr').html(data.msg || 'Login now with these credentials.'); 51 } else { 52 $('#SignUpErr').html(data.msg || 'Invalid username'); 53 } 54 }) 55 .fail(function (jqXHR, textStatus, errorThrown) { 56 $('#SignUpErr').html('Error occured! Please try again.'); 57 }); 58 }; 59 60 var onMsgSubmit = function () { 61 var str = $("#msg").val(); 62 var sendMsg = replace_em(str); 63 if (!sendMsg || sendMsg.length > 1261) { 64 alert("err:内容为空或者内容长度超出限制！") 65 $('#msg').val(''); 66 return; 67 } 68 var roomOf = $("#headmessages strong").html(); 69 socket.emit('chat message', sendMsg, CookieObj.h_imgPath, roomOf); 70 $('#msg').val(''); 71 return false; 72 }; 73 74 socket.on('sysJoin', function (msg) { 75 var joinInfo = ""; 76 joinInfo = '<li class="markInfo">' + msg + '</li>'; 77 $(joinInfo).appendTo($("#messages")).animate({ "opacity": 0.5 }, 2000, function () { 78 $(this).animate({ "opacity": 1 }, 1500, function () { 79 $(this).animate({ "opacity": 0.3 }, 1000); 80 }); 81 }); 82 scroll(); 83 }); 84 85 socket.on('chat message', function (name, msg, img) { 86 var str = ''; 87 if (name == CookieObj.name) { 88 str = '<li class="Liright"><p>' + msg + '</p><img class="msgImg" src="' + CookieObj.h_imgPath + '"/>' + '</li>'; 89 } else { 90 str = '<li class="Lileft"><img class="msgImg" src="' + img + '"/><p>' + msg + '</p></li>'; 91 } 92 $('#messages').append(str); 93 scroll(); 94 }); 95 96 /*房间选择*/ 97 //默认是进广场，从其他房间执行如下函数 98 $("#selectmenu li").eq(0).on("click", function (e) { 99 e.stopPropagation(); 100 $("#selectRoom").hide(); 101 $("#headmessages strong").html("Square"); 102 socket.emit('join', 'Square', $("#gloableName").html()); 103 $("#messages").empty(); 104 }); 105 $("#selectmenu li").eq(1).on("click", function (e) { 106 e.stopPropagation(); 107 $("#selectRoom").show(); 108 }); 109 //选择秦时明月或火影忍者房间 110 $("#selectRoom li").on("click", function () { 111 var roomName = $(this).children("span").html(); 112 var userName = $("#gloableName").html(); 113 $("#headmessages strong").html(roomName); 114 socket.emit('join', roomName, userName); 115 $("#messages").empty(); 116 }); 117 118 119 120 /* 121 *接收所有已注册用户的信息 122 */ 123 socket.on('onlineUser', function (online) { 124 var onlineStr = ''; 125 for (var i = 0; i < online.length; i++) { 126 var item = online[i]; 127 onlineStr += '<li><img src="' + item.h_imgPath + '"/><strong>' + item.name + '</strong><em>[Online]</em></li>'; 128 } 129 $("#AllOnline").empty(); 130 $("#oncount").html(online.length); 131 $("#AllOnline").append(onlineStr); 132 }); 133 socket.on('outlineUser', function (outline) { 134 var outlineStr = ''; 135 for (var i = 0; i < outline.length; i++) { 136 var item = outline[i]; 137 outlineStr += '<li><img src="' + item.h_imgPath + '"/><strong>' + item.name + '</strong><em>[Outline]</em></li>'; 138 } 139 $("#AllOutline").empty(); 140 $("#AllOutline").append(outlineStr); 141 }); 142 socket.on('allUser', function (doc) { 143 $('#allcount').html(doc.length); 144 }); 145 socket.on('disconnect', function (name, msg) { 146 var leftInfo = ""; 147 leftInfo = '<li class="markInfo leave">' + msg + '</li>'; 148 $(leftInfo).appendTo($("#messages")).animate({ "opacity": 0.3 }, 2000, function () { 149 $(this).animate({ "opacity": 1 }, 1500, function () { 150 $(this).animate({ "opacity": 0.3 }, 1000); 151 }); 152 return this; 153 }); 154 scroll(); 155 }); 156 157 /*当前房间人员信息*/ 158 var Lastr, r1, r2, r3; 159 socket.on('SquareRoom', function (roomInfo) { 160 r1 = roomInfo; 161 UpdateRoom(); 162 }); 163 socket.on('QinRoom', function (roomInfo) { 164 r2 = roomInfo; 165 UpdateRoom(); 166 }); 167 socket.on('NarutoRoom', function (roomInfo) { 168 r3 = roomInfo; 169 UpdateRoom(); 170 }); 171 function UpdateRoom() { 172 var $Nowroom = $("#headmessages strong").html(), roomCount, roomStr = ''; 173 switch ($Nowroom) { 174 case "Square": Lastr = r1; break; 175 case "The Legend of Qin": Lastr = r2; break; 176 case "Naruto": Lastr = r3; break; 177 default: Lastr = r1; 178 } 179 roomCount = Lastr.length; 180 for (var i = 0; i < roomCount; i++) { 181 var item = Lastr[i]; 182 roomStr += '<li><img src="' + item.h_imgPath + '"/><strong>' + item.name + '</strong><em>[Online]</em></li>'; 183 } 184 $("#roomCount").html(roomCount); 185 $("#Roommembers ul").empty(); 186 $("#Roommembers ul").append(roomStr); 187 } 188 /* 189 *切换/退出账号 190 */ 191 $("#changeUser").on('click', function () { 192 var res = confirm("Are you sure you want to quit and switch to another account??"); 193 if (res) { 194 UL(); 195 } else { 196 $("#control").hide(); 197 $("#setContent").hide(); 198 $("#stateSelect").hide(); 199 } 200 }); 201 $("#layout").on('click', UL); 202 function UL() { 203 if (document.cookie) { 204 $('#loginDiv').addClass('hidden'); 205 $('#main').removeClass('hidden'); 206 var uname = getCookie("userInfo"); 207 CookieObj = JSON.parse(uname.substr(2)); 208 $.ajax({ 209 url: '/layout', 210 type: 'POST', 211 dataType: 'json', 212 data: { 213 name: CookieObj.name 214 } 215 }) 216 .done(function (data, textStatus, jqXHR) { 217 if (data.value === 'Y') { 218 clearCookie(); 219 window.location.reload(); 220 } 221 }); 222 }; 223 } 224 225 $('#signinForm #loginBtn').click(onLogin); 226 $('#signupForm #signupBtn').click(onSignup); 227 $('#chatMsgForm #send').click(onMsgSubmit); 228 229 $("#clear").on("click", function () { 230 $('#messages').empty(); 231 }); 232 233 /* 234 *监听滚动条事件 235 */ 236 $('#messages').get(0).onscroll = function () { 237 $("#messages .Liright").css("margin-right", 1); 238 } 239 240 /* 241 *屏蔽回车键 242 */ 243 $(document).keydown(function (event) { 244 switch (event.keyCode) { 245 case 13: return false; 246 } 247 }); 248 /* 249 *用户信息 250 */ 251 $(".headImg").eq(0).on('click', function (e) { 252 e.stopPropagation(); 253 if ($("#control").get(0).style.display == "none") { 254 $("#control").show(); 255 } else { 256 $("#control").hide(); 257 $("#setContent").hide(); 258 $("#stateSelect").hide(); 259 } 260 }); 261 262 /*更改资料*/ 263 $("#set").on("click", function () { 264 $("#setContent").show(); 265 $("#stateSelect").hide(); 266 }); 267 /*构造头像选择内容*/ 268 var imgStr = ''; 269 for (var i = 1; i <= 18; i++) { 270 imgStr += '<li><img data-in="' + i + '" src="./img/' + i + '.jpg"/></li>'; 271 if (i % 6 == 0) { 272 imgStr += "<br/>"; 273 } 274 } 275 $("#setThree #imgContent ul").eq(0).append(imgStr); 276 $("#setThree #imgContent li img").on("click", function (e) { 277 e.stopPropagation(); 278 var $index = $(this).attr("data-in"); 279 $("#setThree #imgContent img").removeClass("imgSelected"); 280 $("#setThree #imgContent img").eq(($index - 1)).addClass("imgSelected"); 281 }); 282 /*人物头像模态框*/ 283 $("#setThree").dialog({ 284 autoOpen: false, 285 title: "Changing Avatar", 286 modal: true, 287 width: 578, 288 resizable: false, 289 buttons: { 290 "Ok": function () { 291 var selectedImg = $(".imgSelected").attr("data-in"); 292 // alert(selectedImg); 293 $.ajax({ 294 url: "/updateImg", 295 type: "POST", 296 data: { 297 name: $('#control div span').eq(0).html(), 298 imgIndex: selectedImg 299 } 300 }).done(function (data) { 301 if (data.value === 'Y') { 302 $("#setThree").dialog("close"); 303 $('.headImg').eq(0).attr('src', '/img/' + selectedImg + '.jpg'); 304 $('#setContent').hide(); 305 $('#control').hide(); 306 // alert(data.msg); 307 } 308 }); 309 ; 310 } 311 } 312 }); 313 /*个性签名模态框*/ 314 $("#setTwo").dialog({ 315 autoOpen: false, 316 title: "Personalized signature setting", 317 modal: true, 318 resizable: false, 319 buttons: { 320 "OK": function () { 321 var $newSign = $("#setTwo input[type='text']").eq(0).val(); 322 if ($newSign != '') { 323 $.ajax({ 324 url: '/updateSign', 325 type: 'POST', 326 data: { 327 name: $('#control div span').eq(0).html(), 328 newSign: $newSign 329 } 330 }).done(function (data) { 331 if (data.value === 'Y') { 332 $("#setTwo p").eq(0).html(data.msg); 333 setTimeout(function () { 334 $('#control div em').eq(0).html($newSign); 335 $("#setTwo").dialog('close'); 336 $("#setTwo p").eq(0).html(''); 337 }, 1000); 338 } 339 }); 340 } 341 }, 342 "Cancel": function () { 343 $(this).dialog('close'); 344 } 345 } 346 }); 347 /*密码模态框*/ 348 $("#setOne").dialog({ 349 autoOpen: false, 350 title: "Changeing User password", 351 modal: true, 352 resizable: false, 353 buttons: { 354 "Ok": function () { 355 var $oldpass = $("#setOne #oldpass").val(), $newpass = $("#setOne #newpass").val(); 356 if ($oldpass != '' && $newpass != '') { 357 $.ajax({ 358 url: '/changepass', 359 type: 'POST', 360 data: { 361 name: $('#control div span').eq(0).html(), 362 oldpass: $oldpass, 363 newpass: $newpass 364 } 365 }).done(function (data, textStatus, jqXHR) { 366 if (data.value === 'Y') { 367 $("#setOne p").eq(0).html(data.msg); 368 setTimeout(function () { 369 clearCookie(); 370 $("#setOne p").eq(0).html(''); 371 window.location.reload(); 372 }, 1000); 373 } else if (data.value === 'N') { 374 $("#setOne p").eq(0).html(data.msg); 375 $("#setOne #oldpass").val(''); 376 $("#setOne #newpass").val(''); 377 } 378 }); 379 } 380 }, 381 "Cancel": function () { 382 $(this).dialog('close'); 383 } 384 } 385 }); 386 $("#setContent li").eq(0).click(function (e) { 387 e.stopPropagation(); 388 $("#setOne").dialog("open"); 389 }); 390 $("#setContent li").eq(1).click(function (e) { 391 e.stopPropagation(); 392 $("#setTwo").dialog("open"); 393 }); 394 $("#setContent li").eq(2).click(function (e) { 395 e.stopPropagation(); 396 $("#setThree").dialog("open"); 397 }); 398 399 /* 400 *成员信息面板控制:包括所有成员和具体房间成员的状态 401 */ 402 $("#rightSide #Roommembers ul").hide(); 403 $("#Allmembers div").css({ 'backgroundColor': "rgb(70,130,180)", "color": "white" }); 404 $("#Allmembers div i").addClass("glyphicon glyphicon-triangle-bottom"); 405 $("#Roommembers div i").addClass("glyphicon glyphicon-triangle-right"); 406 $("#rightSide div >div").click(function (e) { 407 var $title = $(this), $anotherTitle = $(this).parent().siblings("div"); 408 if ($title.next('ul').is(":visible")) { 409 $title.siblings('ul').hide(); 410 $title.children("i").removeClass("glyphicon glyphicon-triangle-bottom").addClass("glyphicon glyphicon-triangle-right"); 411 $title.css({ 'backgroundColor': "", "color": "" }); 412 } else { 413 $anotherTitle.children('ul').hide(); 414 $anotherTitle.children('div').css({ 'backgroundColor': "", "color": "" }); 415 $anotherTitle.children("div").children("i").removeClass("glyphicon glyphicon-triangle-bottom").addClass("glyphicon glyphicon-triangle-right"); 416 $title.css({ 'backgroundColor': "rgb(70,130,180)", "color": "white" }); 417 $title.siblings('ul').slideToggle(500).show(); 418 $title.children("i").removeClass("glyphicon glyphicon-triangle-right").addClass("glyphicon glyphicon-triangle-bottom"); 419 } 420 }); 421 422 /*函数集*/ 423 424 /* 425 *保证scroll始终在最底端 426 */ 427 function scroll() { 428 $('#messages,#oldMsg ul').animate({ 429 scrollTop: 999999999 430 }, 0); 431 } 432 433 /* 434 *删除cookie 435 */ 436 function clearCookie() { 437 var keys = document.cookie.match(/[^=;]+(?=\=)/g); 438 if (keys) { 439 var i = keys.length; 440 while (i--) { 441 document.cookie = keys[i] + '=0;expires=' + new Date(0).toUTCString(); 442 } 443 } 444 } 445 446 /* 447 *获取cookie 448 */ 449 function getCookie(sname) { 450 var aCoookie = document.cookie.split(";"); 451 for (var i = 0; i < aCoookie.length; i++) { 452 var aCrumb = aCoookie[i].split("="); 453 if (sname == aCrumb[0]) 454 return decodeURIComponent(aCrumb[1]); 455 } 456 return null; 457 } 458 459 /* 460 *界面render 461 */ 462 function render() { 463 if (document.cookie) { 464 $('.container').addClass('hidden'); 465 $('#main').removeClass('hidden'); 466 var uname = getCookie("userInfo"); 467 CookieObj = JSON.parse(uname.substr(2)); 468 socket.emit('join', $("#headmessages strong").html(), CookieObj.name); 469 $('.headImg').eq(0).attr('src', CookieObj.h_imgPath); 470 $('#control div span').eq(0).html(CookieObj.name); 471 $('#control div em').eq(0).html(CookieObj.personalizedSign); 472 }; 473 } 474 $('.emotion').qqFace({ 475 id: 'facebox', 476 assign: 'msg', 477 path: 'img/' //表情存放的路径 478 }); 479 function replace_em(str) { 480 str = str.replace(/\</g, '<'); 481 str = str.replace(/\>/g, '>'); 482 str = str.replace(/\n/g, '<br/>'); 483 str = str.replace(/\[em_([0-9]*)\]/g, '<img src="img/$1.gif" border="0" />'); 484 return str; 485 } 486 /*查询聊天记录*/ 487 $("#chatRecord").on('click', function () { 488 $.ajax({ 489 url: "/queryChatMsg", 490 type: "POST", 491 data: { 492 roomName: $("#headmessages strong").html() 493 } 494 }).done(function (data) { 495 var Msg = data.msg; 496 var msgStr = '', 497 $name = $('#control div span').eq(0).html(); 498 for (var i = 0; i < Msg.length; i++) { 499 var item = Msg[i]; 500 if (item.name == $name) { 501 msgStr += '<li><span class="blue">' + item.name + '</span> <em class="blue">' + item.saytime + '</em><br/><span>' + item.msg + '</span></li>'; 502 } else { 503 msgStr += '<li><span class="green">' + item.name + '</span> <em class="green">' + item.saytime + '</em><br/><span>' + item.msg + '</span></li>'; 504 } 505 } 506 $("#oldMsg ul").empty(); 507 $("#oldMsg ul").css({ "background-img": 'url("/img/loading.gif")' }); 508 $("#rightSide").hide(); 509 $("#oldMsg").show(); 510 setTimeout(function () { 511 $("#oldMsg ul").append(msgStr); 512 scroll(); 513 }, 2000); 514 }); 515 }); 516 517 /*关闭历史记录窗口*/ 518 $("#oldMsgHead i").on('click', function () { 519 $("#oldMsg ul").empty(); 520 $("#oldMsg").hide(); 521 $("#rightSide").show(); 522 }); 523 /*清空聊天历史消息*/ 524 $("#clearoldMsg i").on('click', function () { 525 var result = confirm("This action will delete the chat record on the database. Do you want to continue?"); 526 if (result) { 527 $.ajax({ 528 url: '/deleteMsg', 529 type: 'POST', 530 data: { 531 roomName: $("#headmessages strong").html() 532 } 533 }).done(function (data) { 534 if (data.value === 'Y') { 535 alert(data.msg); 536 $("#oldMsg ul").empty(); 537 $("#oldMsg").hide(); 538 $("#rightSide").show(); 539 } 540 }); 541 } 542 }); 543 //多行文本输入框自动聚焦 544 $("#msg").focus(); 545 //获取当前城市以及城市天气 546 function findWeather() { 547 var cityUrl = 'http://int.dpool.sina.com.cn/iplookup/iplookup.php?format=js'; 548 $.getScript(cityUrl, function (script, textStatus, jqXHR) { 549 var citytq = remote_ip_info.city;// 获取城市 550 var url = "http://php.weather.sina.com.cn/iframe/index/w_cl.php?code=js&city=" + citytq + "&day=0&dfc=3"; 551 $.ajax({ 552 url: url, 553 dataType: "script", 554 scriptCharset: "gbk", 555 success: function (data) { 556 var _w = window.SWther.w[citytq][0]; 557 var _f = _w.f1 + "_0.png"; 558 if (new Date().getHours() > 17) { 559 _f = _w.f2 + "_1.png"; 560 } 561 var img = "<img width='25px' height='25px' src='http://i2.sinaimg.cn/dy/main/weather/weatherplugin/wthIco/20_20/" + _f 562 + "' />"; 563 // var tq = citytq + " " + img + " " + _w.s1 + " " + _w.t1 + "℃～" + _w.t2 + "℃ " + _w.d1 + _w.p1 + "级"; 564 var tq = img + _w.s1 + ' ' + citytq + "<br/><span> " + _w.t2 + "℃～" + (_w.t1 || 25) + "℃ " + "</span>"; 565 $('#weather').html(tq); 566 } 567 }); 568 }); 569 } 570 571 findWeather(); 572 });
主界面如下图所示即聊天分为三个模块（左中右）即：左为功能模块，用户可以进行房间的选择，以及点击自己的图像修改个人资料等操作；中为聊天模块，显示当前房间聊天内容以及聊天信息输入框；右为信息展示模块，默认显示所有在线用户信息以及当前房间在线成员信息，用户可以切换查看当前房间历史聊天记录。
（2）数据库
涉及到的技术：mongoDB、mongoose
由于javascript是一门弱类型语言，所以操作数据库没有java、php等语言方便。但是我们可以通过mongoose建立模型model映射到数据库中去，将对数据库的操作转换到操作model中去。
1 var mongoose = require("mongoose"); 2 var msgRecord=new mongoose.Schema({ 3 name:{ 4 type:String, 5 index:true, 6 }, 7 roomName:{ 8 type:String 9 }, 10 msg:{ 11 type:String, 12 }, 13 saytime:{ 14 type:String, 15 } 16 }); 17 var UserSchema = new mongoose.Schema({ 18 name: { 19 type: String, 20 unique: true, 21 index: true 22 }, 23 password:{ 24 type: String, 25 index: true 26 }, 27 user_id: { 28 type: mongoose.Schema.Types.ObjectId, 29 index: true 30 }, 31 updated: { 32 type: Date, default: Date.now 33 }, 34 status: { 35 type: Boolean, 36 default: false 37 }, 38 h_imgPath: { 39 type: String, 40 default:"/img/1.jpg" 41 }, 42 personalizedSign:{ 43 type:String, 44 default:"Write something will well`" 45 } 46 }); 47 48 var User = mongoose.model('User', UserSchema); 49 var Msg=mongoose.model('Msg',msgRecord); 50 module.exports = { 51 User:User, 52 Msg:Msg 53 };
（3）后台
涉及到的技术：Node.js,socket.io,Express
后台作为前端和数据库的桥梁，接收前端传过来的参数，去请求服务器，响应不同的服务请求。同时，通过socket.io进行实时通信，实时通信的前提是在客户端也要引入相关的js文件，通过on()和emit()方法、自定义事件达到目的
操作socket.io
1 var users = {}; 2 var QueryUser = require('./mongoDB/models/model').User; 3 var Msg = require('./mongoDB/models/model').Msg; 4 //获取实时时间 5 function gettime() { 6 var time = new Date(); 7 var timepartone = time.getFullYear() + '-' + (time.getMonth() + 1) + '-' + time.getDate() + ' '; 8 var timemid = time.getHours(), s; 9 if (timemid < 6) { 10 s = "凌晨 " + timemid; 11 } else if (timemid < 12) { 12 s = "上午 " + timemid; 13 } else if (timemid < 18) { 14 s = "下午 " + '0' + (timemid - 12); 15 } else { 16 s = "晚上 " + (timemid - 12); 17 } 18 var timeparttwo = s + ":" + (time.getMinutes() < 10 ? '0' + time.getMinutes() : time.getMinutes()); 19 return timepartone + timeparttwo; 20 } 21 /*创建三个房间：Square、The Legend of Qin、Naruto*/ 22 var rooms = { 'Square': [], 'The Legend of Qin': [], 'Naruto': [] }; 23 var user = ''; 24 module.exports = function (app, io) { 25 io.on('connection', function (socket) { 26 socket.on('join', function (roomName, userName) { 27 user = userName; 28 users[socket.id] = userName; 29 for (var i in rooms) { 30 if (roomName != i) { 31 var index = rooms[i].indexOf(user); 32 if (index !== -1) { 33 console.log("删除前" + rooms[i]); 34 rooms[i].splice(index, 1); 35 io.to(i).emit('sysLeft', user + "退出了房间" + roomName); 36 socket.leave(i); 37 console.log(userName + '离开了房间' + i + ':这个房间里还有' + rooms[i]); 38 } 39 } 40 } 41 var flag = true; 42 for (var j = 0; j < rooms[roomName].length; j++) { 43 if (rooms[roomName][j] == user) { 44 flag = false; 45 } 46 } 47 if (flag) { 48 rooms[roomName].push(user); 49 socket.join(roomName); 50 } 51 io.sockets.in(roomName).emit('sysJoin', user + '加入了房间' + roomName); 52 total(); 53 console.log(user + '加入了' + roomName); 54 }); 55 socket.on('chat message', function (msg, img, roomOf) { 56 var name = ''; 57 name = users[socket.id]; 58 var newMsg = new Msg({ name: name, msg: msg, saytime: gettime(),roomName:roomOf }); 59 newMsg.save(); 60 if (rooms[roomOf].indexOf(name) === -1) { 61 return false; 62 } 63 console.log(roomOf + ":" + msg); 64 io.sockets.in(roomOf).emit('chat message', name, msg, img); 65 }); 66 socket.on('disconnect', function () { 67 var msg = '', name = '', time = ''; 68 time = gettime();; 69 name = users[socket.id]; 70 for (var i in rooms) { 71 var index = rooms[i].indexOf(name); 72 if (index !== -1) { 73 console.log("删除前" + rooms[i]); 74 rooms[i].splice(index, 1); 75 io.to(i).emit('sysLeft', name + "退出了房间" + i); 76 socket.leave(i); 77 console.log(name + '离开了房间' + i + ':这个房间里还有' + rooms[i]); 78 } 79 } 80 msg = name + '离开群聊 ' + time; 81 io.emit('disconnect', name, msg); 82 var timeTotal = total(); 83 }); 84 //获取总用户 85 function total() { 86 QueryUser.find({}, function (err, doc) { 87 io.emit('allUser', doc); 88 }); 89 QueryUser.find({ status: false }, function (err, doc) { 90 io.emit('outlineUser', doc); 91 }); 92 QueryUser.find({ status: true }, function (err, doc) { 93 io.emit('onlineUser', doc); 94 }); 95 //查询房间里成员的信息 96 /*三个房间：Square、The Legend of Qin、Naruto*/ 97 var F_RMInfo = [], S_RMInfo = [], T_RMInfo = []; 98 for (var k = 0; k < rooms["Square"].length; k++) { 99 QueryUser.findOne({ name: rooms["Square"][k] }, function (err, doc) { 100 F_RMInfo.push(doc); 101 io.sockets.in("Square").emit('SquareRoom', F_RMInfo); 102 console.log(F_RMInfo); 103 }); 104 } 105 for (var i = 0; i < rooms["The Legend of Qin"].length; i++) { 106 QueryUser.findOne({ name: rooms["The Legend of Qin"][i] }, function (err, doc) { 107 S_RMInfo.push(doc); 108 io.sockets.in("The Legend of Qin").emit('QinRoom', S_RMInfo); 109 console.log(S_RMInfo); 110 }); 111 } 112 for (var j = 0; j < rooms["Naruto"].length; j++) { 113 QueryUser.findOne({ name: rooms["Naruto"][j] }, function (err, doc) { 114 T_RMInfo.push(doc); 115 io.sockets.in("Naruto").emit('NarutoRoom', T_RMInfo); 116 console.log(T_RMInfo); 117 }); 118 } 119 } 120 }); 121 122 };
服务器js
1 var express = require('express'), 2 cookieParser = require('cookie-parser'), 3 bodyParser = require('body-parser'), 4 http = require('http'), 5 path = require('path'), 6 io = require('socket.io'), 7 mongoose = require('mongoose'), 8 app = express(), 9 db, 10 userRoutes, 11 socketIO; 12 13 /* 数据库连接 */ 14 mongoose.connect('mongodb://localhost:27017/chatroom'); 15 db = mongoose.connection; 16 db.on('error', console.error.bind(console, '数据库连接失败!')); 17 db.once('open', function callback() { 18 console.log('数据库连接成功！'); 19 }); 20 21 /*Express 配置*/ 22 app.use(cookieParser()); 23 app.use(bodyParser.json()); 24 app.use(bodyParser.urlencoded({ extended: true })); 25 app.use(express.static(path.join(__dirname, 'public'))); 26 27 28 http=http.createServer(app,function(req,res){ 29 res.writeHead(200, {'Content-Type': 'text/html;charset=utf-8'}); 30 }); 31 io = io(http); 32 33 indexRoutes = require('./routes/index')(app); 34 userRoutes = require('./routes/users')(app); 35 36 /*绑定io到服务器上*/ 37 socketIO = require('./socketIO')(app, io); 38 39 http.listen(3000, function () { 40 console.log('listening on *:3000'); 41 });
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