我使用了现成的php ajax聊天脚本。问题是我无法根据特定页面允许聊天。
如何编辑代码以允许特定页面聊天，并防止所有页面中的数据输入都相同。
简单来说，我该如何允许聊天仅在特定页面中的两个选定用户之间进行。
HTML：
<div id="chatTopBar" class="rounded"></div>
<div class="line_holder" id="chatLineHolder<?php echo htmlspecialchars($_GET['did']); ?>"></div>
<input type="hidden" name="did_hidden" id="did_hidden" value="<?php echo htmlspecialchars($_GET['did']); ?>" />
<!--<div id="chatUsers" class="rounded"></div> -->
<div id="chatBottomBar" class="rounded">
<div class="tip"></div>
<form id="loginForm" method="post" action="">
<input id="name" name="name" value="<?php echo $_SESSION['real_name']; ?>-<?php echo htmlspecialchars($_GET['deal_no']); ?>" class="rounded" maxlength="16" />
<input id="email" name="email" value="<?php echo $_SESSION['username']; ?>" class="rounded" />
<input type="submit" class="blueButton" value="Login" />
</form>
<form id="submitForm" method="post" action="">
<input type="hidden" name="did_hidden" id="did_hidden" value="<?php echo $_GET['did']; ?>" />
<textarea cols="40" id="chatText" name="chatText" class="rounded"></textarea>
<!-- <input id="chatText" name="chatText" class="rounded" maxlength="255" /> -->
<input type="submit" class="blueButton" value="send" />
</form>
</div>
Js：
$(document).ready(function(){
//toggle
$("#toggle_seller").click(function(){
$("#toggle_seller_details").slideToggle();
})
$("#toggle_buyer").click(function(){
$("#toggle_buyer_details").slideToggle();
})
// Run the init method on document ready:
chat.init();
});
var chat = {
// data holds variables for use in the class:
data : {
lastID : 0,
noActivity : 0
},
// Init binds event listeners and sets up timers:
init : function(){
// Using the defaultText jQuery plugin, included at the bottom:
var username=$("#name").val();
var email=$("#email").val();
$('#name').defaultText(username);
$('#email').defaultText(email);
var line_holder=$('.line_holder').attr('id');
// Converting the #x div into a jScrollPane,
// and saving the plugin's API in chat.data:
chat.data.jspAPI = $('#'+line_holder).jScrollPane({
verticalDragMinHeight: 12,
verticalDragMaxHeight: 12
}).data('jsp');
// We use the working variable to prevent
// multiple form submissions:
var working = false;
// Logging a person in the chat:
$('#loginForm').submit(function(){
if(working) return false;
working = true;
// Using our tzPOST wrapper function
// (defined in the bottom):
$.tzPOST('login',$(this).serialize(),function(r){
working = false;
if(r.error){
chat.displayError(r.error);
}
else chat.login(r.name,r.gravatar);
});
return false;
});
// Submitting a new chat entry:
$('#submitForm').submit(function(){
var text = $('#chatText').val();
if(text.length == 0){
return false;
}
if(working) return false;
working = true;
// Assigning a temporary ID to the chat:
var line_holder=$('.line_holder').attr('id');
var tempID = 't'+Math.round(Math.random()*1000000),
params = {
id : tempID,
author : chat.data.name,
gravatar : chat.data.gravatar,
text : text.replace(/</g,'<').replace(/>/g,'>')
};
// Using our addChatLine method to add the chat
// to the screen immediately, without waiting for
// the AJAX request to complete:
chat.addChatLine($.extend({},params));
// Using our tzPOST wrapper method to send the chat
// via a POST AJAX request:
$.tzPOST('submitChat',$(this).serialize(),function(r){
working = false;
$('#chatText').val('');
$('div.chat-'+tempID).remove();
params['id'] = r.insertID;
chat.addChatLine($.extend({},params));
});
return false;
});
// Logging the user out:
$('a.logoutButton').live('click',function(){
$('#chatTopBar > span').fadeOut(function(){
$(this).remove();
});
$('#submitForm').fadeOut(function(){
$('#loginForm').fadeIn();
});
$.tzPOST('logout');
return false;
});
// Checking whether the user is already logged (browser refresh)
$.tzGET('checkLogged',function(r){
if(r.logged){
chat.login(r.loggedAs.name,r.loggedAs.gravatar);
}
});
// Self executing timeout functions
(function getChatsTimeoutFunction(){
chat.getChats(getChatsTimeoutFunction);
})();
(function getUsersTimeoutFunction(){
chat.getUsers(getUsersTimeoutFunction);
})();
},
// The login method hides displays the
// user's login data and shows the submit form
login : function(name,gravatar){
chat.data.name = name;
chat.data.gravatar = gravatar;
$('#chatTopBar').html(chat.render('loginTopBar',chat.data));
$('#loginForm').fadeOut(function(){
$('#submitForm').fadeIn();
$('#chatText').focus();
});
},
// The render method generates the HTML markup
// that is needed by the other methods:
render : function(template,params){
// template=$('.line_holder').attr('id');
var arr = [];
switch(template){
case 'loginTopBar':
arr = [
'<span><img src="',params.gravatar,'" width="23" height="23" />',
'<span class="name">',params.name,
'</span><a href="" class="logoutButton rounded">خروج</a></span>'];
break;
case 'chatLine':
arr = [
'<div class="chat chat-',params.id,' rounded"><span class="gravatar"><img src="',params.gravatar,
'" width="23" height="23" onload="this.style.visibility=\'visible\'" />','</span><span class="author">',params.author,
':</span><span class="text">',params.text,'</span><span class="time">',params.time,'</span></div>'];
break;
case 'user':
arr = [
'<div class="user" title="',params.name,'"><img src="',
params.gravatar,'" width="30" height="30" onload="this.style.visibility=\'visible\'" /></div>'
];
break;
}
// A single array join is faster than
// multiple concatenations
return arr.join('');
},
// The addChatLine method ads a chat entry to the page
addChatLine : function(params){
var line_holder=$('.line_holder').attr('id');
// All times are displayed in the user's timezone
var d = new Date();
if(params.time) {
// PHP returns the time in UTC (GMT). We use it to feed the date
// object and later output it in the user's timezone. JavaScript
// internally converts it for us.
d.setUTCHours(params.time.hours,params.time.minutes);
}
params.time = (d.getHours() < 10 ? '0' : '' ) + d.getHours()+':'+
(d.getMinutes() < 10 ? '0':'') + d.getMinutes();
var markup = chat.render('chatLine',params),
exists = $("#"+line_holder + " .chat-"+params.id);
if(exists.length){
exists.remove();
}
if(!chat.data.lastID){
// If this is the first chat, remove the
// paragraph saying there aren't any:
$('#'+line_holder+' p').remove();
}
// If this isn't a temporary chat:
if(params.id.toString().charAt(0) != 't'){
var previous = $('#'+line_holder+' .chat-'+(+params.id - 1));
if(previous.length){
previous.after(markup);
}
else chat.data.jspAPI.getContentPane().append(markup);
}
else chat.data.jspAPI.getContentPane().append(markup);
// As we added new content, we need to
// reinitialise the jScrollPane plugin:
chat.data.jspAPI.reinitialise();
chat.data.jspAPI.scrollToBottom(true);
},
// This method requests the latest chats
// (since lastID), and adds them to the page.
getChats : function(callback){
$.tzGET('getChats',{lastID: chat.data.lastID},function(r){
for(var i=0;i<r.chats.length;i++){
chat.addChatLine(r.chats[i]);
}
if(r.chats.length){
chat.data.noActivity = 0;
chat.data.lastID = r.chats[i-1].id;
}
else{
// If no chats were received, increment
// the noActivity counter.
chat.data.noActivity++;
}
if(!chat.data.lastID){
chat.data.jspAPI.getContentPane().html('<p class="noChats">لايوجد محادثات</p>');
}
// Setting a timeout for the next request,
// depending on the chat activity:
var nextRequest = 1000;
// 2 seconds
if(chat.data.noActivity > 3){
nextRequest = 2000;
}
if(chat.data.noActivity > 10){
nextRequest = 5000;
}
// 15 seconds
if(chat.data.noActivity > 20){
nextRequest = 15000;
}
setTimeout(callback,nextRequest);
});
},
// Requesting a list with all the users.
getUsers : function(callback){
$.tzGET('getUsers',function(r){
var users = [];
for(var i=0; i< r.users.length;i++){
if(r.users[i]){
users.push(chat.render('user',r.users[i]));
}
}
var message = '';
if(r.total<1){
message = 'No one is online';
}
else {
message = r.total+' '+(r.total == 1 ? 'person':'people')+' online';
}
users.push('<p class="count">'+message+'</p>');
$('#chatUsers').html(users.join(''));
setTimeout(callback,15000);
});
},
// This method displays an error message on the top of the page:
displayError : function(msg){
var elem = $('<div>',{
id : 'chatErrorMessage',
html : msg
});
elem.click(function(){
$(this).fadeOut(function(){
$(this).remove();
});
});
setTimeout(function(){
elem.click();
},5000);
elem.hide().appendTo('body').slideDown();
}
};
// Custom GET & POST wrappers:
$.tzPOST = function(action,data,callback){
$.post('php/ajax.php?action='+action,data,callback,'json');
}
$.tzGET = function(action,data,callback){
$.get('php/ajax.php?action='+action,data,callback,'json');
}
// A custom jQuery method for placeholder text:
$.fn.defaultText = function(value){
var element = this.eq(0);
element.data('defaultText',value);
element.focus(function(){
if(element.val() == value){
element.val('').removeClass('defaultText');
}
}).blur(function(){
if(element.val() == '' || element.val() == value){
element.addClass('defaultText').val(value);
}
});
return element.blur();
}
ajax.php
<?php
session_start();
/* Database Configuration. Add your details below */
$dbOptions = array(
'db_host' => 'localhost',
'db_user' => 'root',
'db_pass' => '',
'db_name' => 'bitcoin'
);
/* Database Config End */
error_reporting(E_ALL ^ E_NOTICE);
require "classes/DB.class.php";
require "classes/Chat.class.php";
require "classes/ChatBase.class.php";
require "classes/ChatLine.class.php";
require "classes/ChatUser.class.php";
session_name('webchat');
session_start();
if(get_magic_quotes_gpc()){
// If magic quotes is enabled, strip the extra slashes
array_walk_recursive($_GET,create_function('&$v,$k','$v = stripslashes($v);'));
array_walk_recursive($_POST,create_function('&$v,$k','$v = stripslashes($v);'));
}
try{
// Connecting to the database
DB::init($dbOptions);
$response = array();
// Handling the supported actions:
switch($_GET['action']){
case 'getdid':
$response=Chat::getdid($_GET['did']);
break;
case 'login':
$response = Chat::login($_POST['name'],$_POST['email']);
break;
case 'checkLogged':
$response = Chat::checkLogged();
break;
case 'logout':
$response = Chat::logout();
break;
case 'submitChat':
$response = Chat::submitChat($_POST['chatText']);
break;
case 'getUsers':
$response = Chat::getUsers();
break;
case 'getChats':
$Chat2=new Chat;
$response = $Chat2->getChats($_GET['lastID']);
break;
default:
throw new Exception('Wrong action');
}
echo json_encode($response);
}
catch(Exception $e){
die(json_encode(array('error' => $e->getMessage())));
}
?>
chat.class.php：
<?php
/* The Chat class exploses public static methods, used by ajax.php */
class Chat {
public static function login($name,$email){
if(!$name || !$email){
throw new Exception('Fill in all the required fields.');
}
if(!filter_input(INPUT_POST,'email',FILTER_DEFAULT)){
throw new Exception('Your email is invalid.');
}
// Preparing the gravatar hash:
$gravatar = md5(strtolower(trim($email)));
//$gravatar = md5(uniqid());
$user = new ChatUser(array(
'name' => $name,
'gravatar' => $gravatar
));
// The save method returns a MySQLi object
if($user->save()->affected_rows != 1){
throw new Exception('اختار اسم مستعار اخر');
}
$_SESSION['user'] = array(
'name' => $name,
'gravatar' => $gravatar
);
return array(
'status' => 1,
'name' => $name,
'gravatar' => Chat::gravatarFromHash($gravatar)
);
}
public static function checkLogged(){
$response = array('logged' => false);
if($_SESSION['user']['name']){
$response['logged'] = true;
$response['loggedAs'] = array(
'name' => $_SESSION['user']['name'],
'gravatar' => Chat::gravatarFromHash($_SESSION['user']['gravatar'])
);
}
return $response;
}
public static function logout(){
DB::query("DELETE FROM webchat_users WHERE name = '".DB::esc($_SESSION['user']['name'])."'");
$_SESSION = array();
unset($_SESSION['user']['name']);
unset($_SESSION['user']['gravatar']);
return array('status' => 1);
}
public static function submitChat($chatText){
if(!$_SESSION['user']){
throw new Exception('You are not logged in');
}
if(!$chatText){
throw new Exception('You haven\' entered a chat message.');
}
$chat = new ChatLine(array(
'author' => $_SESSION['user']['name'],
'gravatar' => $_SESSION['user']['gravatar'],
'text' => $chatText
));
// The save method returns a MySQLi object
$insertID = $chat->save()->insert_id;
return array(
'status' => 1,
'insertID' => $insertID
);
}
public static function getUsers(){
if($_SESSION['user']['name']){
$user = new ChatUser(array('name' => $_SESSION['user']['name']));
$user->update();
}
// Deleting chats older than 5 minutes and users inactive for 30 seconds
DB::query("DELETE FROM webchat_lines WHERE ts < SUBTIME(NOW(),'0:30:0')");
DB::query("DELETE FROM webchat_users WHERE last_activity < SUBTIME(NOW(),'0:3:60')");
$result = DB::query('SELECT * FROM webchat_users ORDER BY name ASC LIMIT 18');
$users = array();
while($user = $result->fetch_object()){
$user->gravatar = Chat::gravatarFromHash($user->gravatar,30);
$users[] = $user;
}
return array(
'users' => $users,
'total' => DB::query('SELECT COUNT(*) as cnt FROM webchat_users')->fetch_object()->cnt
);
}
public function getChats($lastID) {
$lastID = (int)$lastID;
$didx= $_SESSION['dido'];
//$result = DB::query('SELECT * FROM webchat_lines WHERE id > '.$lastID.' and deal_did="'.$new.'" ORDER BY id ASC');
$result = DB::query('SELECT * FROM webchat_lines WHERE deal_did="'.$didx.'" ORDER BY id ASC');
$chats = array();
while($chat = $result->fetch_object()){
// Returning the GMT (UTC) time of the chat creation:
$chat->time = array(
'hours' => gmdate('H',strtotime($chat->ts)),
'minutes' => gmdate('i',strtotime($chat->ts))
);
$chat->gravatar = Chat::gravatarFromHash($chat->gravatar);
$chats[] = $chat;
}
return array('chats' => $chats);
}
public static function gravatarFromHash($hash, $size=23){
return 'http://www.gravatar.com/avatar/'.$hash.'?size='.$size.'&default='.
urlencode('http://www.gravatar.com/avatar/ad516503a11cd5ca435acc9bb6523536?size='.$size);
}
}
?>
答案 0 :(得分：0)
在Javascript中，您可以使用window.location.pathname来确定页面的名称。
示例：如果您在主页上，则window.location.pathname将返回“ /”
因此，如果您只想在首页上输入内容，则将代码包装在其中：
if(window.location.pathname == '/') {
//DOE GOES HERE`enter code here`
}