jquery ajax调用不是异步的
Pat*_*ick 3 php jquery asynchronous race-condition
我对jQuery实现它的AJAX方法很新鲜.
我有一个简单的设置,访问两个不同的页面,一个需要10秒钟完成(我有一个计时器设置)和一个检查第一页的状态.
这两个函数progressCheck()每秒都以最新状态请求其页面,beginLogin()并且需要10秒才能加载.我在服务器上的用户对象中设置了一个值,两个页面都通过symfony 1.4访问.
问题是,在progressCheck()我点击之前正常工作beginLogin(),然后在完成之前不会进行任何更改beginLogin().我有两个函数设置为异步运行.我知道这一定很简单,但是我很茫然.
我在运行此页面时运行了Firebug-Net,结果是:
许多的progressCheck()等待期间为10秒的电话叫,但净说,他们跑了进来〜200毫秒,没有任何等待时间.
有任何想法吗？
代码如下:
<button onclick="beginLogin();">Begin Login</button>
<button onclick="progressCheck();">Check Progress</button>
<button onclick="clearCheck();">Clear Check</button>
<br/>
<div id="result_div">
</div>
<div id="progress_div">
</div>
<style type="text/css">
#progress_div
{
width: 800px;
height: 200px;
border: 1px solid #CCCCCC;
overflow: scroll;
background-color: #AAEEFF;
}
#result_div
{
width: 800px;
height: 300px;
border: 1px solid #CCCCCC;
overflow: scroll;
background-color: #FFEEAA;
}
</style>
<script type="text/javascript">
function beginLogin()
{
try
{
var login_url = "http://example.com/home/loginScript";
$.ajax({
url: login_url,
success: function(data){
$("#result_div").append('<pre>'+data+'</pre><hr/>');
alert("finished");
}
});
}
catch(e)
{
alert("There was an error beginning the login: " + e);
return false;
}
return true;
}
function progressCheck()
{
try
{
var check_url = "http://example.com/home/checkLoginProgress";
$.ajax({
url: check_url,
success: function(data){
$("#progress_div").append('<pre>'+data+'</pre><hr/>');
}
});
}
catch(e)
{
alert("There was an error checking the progress: " + e);
return false;
}
check_id = setTimeout('progressCheck()', 1000);
return true;
}
// set progress checking function to call every second
var check_id = setTimeout('progressCheck()', 1000);
function clearCheck()
{
try
{
clearTimeout(check_id);
}
catch(e)
{
alert("There was an error clearing the check: " + e);
return false;
}
return true;
}
</script>
更新 以下是两个PHP函数,它们返回两个页面调用的数据
define('DEBUG', true);
public function executeCheckLoginProgress(sfWebRequest $request)
{
if($this->getUser()->hasAttribute('login_script', 'sfGuardSecurityUser'))
$this->login_progress = $this->getUser()->getAttribute('login_script', -1, 'sfGuardSecurityUser');
else
$this->login_progress = '[undefined]';
$conn = $this->connectTestDb();
$query = sprintf("SELECT * FROM company_type WHERE id = 1;");
$result = mysql_query($query, $conn);
$this->login_progress = mysql_result($result, 0, 'name');
if($request->isXmlHttpRequest())
{ // this is an ajax all, only return value
$this->getResponse()->setHttpHeader("Content-type", "text/plain");
$this->getResponse()->setContent($this->login_progress);
return sfView::NONE;
}
}
public function executeLoginScript(sfWebRequest $request)
{
$user = $this->getUser();
if(!$user->hasAttribute('login_script', 'sfGuardSecurityUser'))
$user->setAttribute('login_script', 0, 'sfGuardSecurityUser');
$this->login_value = $user->getAttribute('login_script', 0, 'sfGuardSecurityUser');
$conn = $this->connectTestDb();
$query = sprintf("SELECT * FROM company_type WHERE id = 1;");
$result = mysql_query($query, $conn);
$this->login_value = mysql_result($result, 0, 'name');
$result = $user->assignAccessLevelIds();
if($result === true)
{
$this->login_value += 5;
$user->setAttribute('login_script', $this->login_value, 'sfGuardSecurityUser');
$query = sprintf("UPDATE company_type SET `name` = '%s' WHERE id = 1;", mysql_real_escape_string($this->login_value));
$result = mysql_query($query, $conn);
$this->login_progress = mysql_result($result, 0, 'name');
}
else
{
DataMan::logRawMessage('Unable to set access level user ['.$user->getAttribute('user_id', null, 'sfGuardSecurityUser'), sfLogger::WARNING);
}
// just for testing sleep!
if(DEBUG === true)
sleep(5);
$result = $user->assignCompanyIds();
if($result === true)
{
$this->login_value += 5;
$user->setAttribute('login_script', $this->login_value, 'sfGuardSecurityUser');
$query = sprintf("UPDATE company_type SET `name` = '%s' WHERE id = 1;", mysql_real_escape_string($this->login_value));
$result = mysql_query($query, $conn);
$this->login_progress = mysql_result($result, 0, 'name');
}
else
{
DataMan::logRawMessage('Unable to set company ids user ['.$user->getAttribute('user_id', null, 'sfGuardSecurityUser').'] '.__LINE__, sfLogger::WARNING);
}
// just for testing sleep!
if(DEBUG === true)
sleep(5);
}