我的 AJAX 有一个非常奇怪的问题。使用 Chrome、IE 和 Safari，以下 AJAX 调用在我的开发和实时系统中完美运行：
var request = $.ajax({
url: "http://domain.de<?php echo $this->webroot."Posts/plzResults"; ?>",
type: "POST",
xhrFields: {withCredentials:true},
dataType:"json",
async: true,
data: form,
success: function (response) {
$(".plzSearchLoading").fadeOut(200);
$("#ajaxSearchSCourierDiv").fadeIn(200);//.html(response);
{
$('#ajaxSearchSCourierDiv').html('');
var parsed = JSON.parse(response);
if (response == '[]') {
$('#ajaxSearchSCourierDiv').append('<div class="zipInputResults"><table<tr><td>Postleitzahl ungültig.</td></tr></table></div>');
} else {
$('#ajaxSearchSCourierDiv').append('<div class="zipInputResults"><table>');
for (prop in response) {
var zip = parsed[prop].Zipcode;
var city = parsed[prop].City;
zip = zip.trim();
city = city.trim();
$('#ajaxSearchSCourierDiv .zipInputResults table').append('<tr class="post-hover zipClick" onClick="setValues(\''+ zip +'\', \''+ city +'\')"><td>' + zip + '</td><td>' + city + '</td></tr>'); }
$('#ajaxSearchSCourierDiv').append('</table></div>');
}
}
},
error: function (xmlHttpRequest, textStatus, errorThrown) {
if(xmlHttpRequest.readyState == 0 || xmlHttpRequest.status == 0)
return; // it's not really an error
else
alert( "Da ging was schief. Bitte probiere es nochmal." );
}
});
对应的 Cake 控制器代码如下所示：
public function plzResults() {
$this->layout = NULL;
$this->autoRender = false;
// Suche nach PLZ und Städten, damit User die anklicken kann bei Inserat erstellen
if($this->RequestHandler->isAjax()){
//je nachdem, ob suche-oder biete-feld und ob buchstaben oder zahlen eingegeben werden
if (isset($this->request->data['ajaxSearchSCourier'])) {
if (!is_numeric($this->request->data['ajaxSearchSCourier'])) {
$city = $this->request->data['ajaxSearchSCourier'];
} else {
$zipcode = $this->request->data['ajaxSearchSCourier'];
}
};
if (isset($this->request->data['ajaxSearchSHelp'])) {
if (!is_numeric($this->request->data['ajaxSearchSHelp'])) {
$city = $this->request->data['ajaxSearchSHelp'];
} else {
$zipcode = $this->request->data['ajaxSearchSHelp'];
}
};
if (isset($this->request->data['ajaxSearchBCourier'])) {
if (!is_numeric($this->request->data['ajaxSearchBCourier'])) {
$city = $this->request->data['ajaxSearchBCourier'];
} else {
$zipcode = $this->request->data['ajaxSearchBCourier'];
}
};
if (isset($this->request->data['ajaxSearchBHelp'])) {
if (!is_numeric($this->request->data['ajaxSearchBHelp'])) {
$city = $this->request->data['ajaxSearchBHelp'];
} else {
$zipcode = $this->request->data['ajaxSearchBHelp'];
}
};
if (isset($this->request->data['Post']['ZIPCODE'])) {
if (!is_numeric($this->request->data['Post']['ZIPCODE'])) {
$city = $this->request->data['Post']['ZIPCODE'];
} else {
$zipcode = $this->request->data['Post']['ZIPCODE'];
}
};
if (isset($this->request->data['Post']['DELIVERYAREA'])) {
if (!is_numeric($this->request->data['Post']['DELIVERYAREA'])) {
$city = $this->request->data['Post']['DELIVERYAREA'];
} else {
$zipcode = $this->request->data['Post']['DELIVERYAREA'];
}
};
if (isset($this->request->data['Post']['CITY']) && $this->request->data['Post']['CITY'] <> '') {
if (is_numeric($this->request->data['Post']['CITY'])) {
$zipcode = $this->request->data['Post']['CITY'];
} else {
$city = $this->request->data['Post']['CITY'];
}
};
//geo-db laden
$this->loadModel('Geonames');
if (isset($zipcode)) {
$cityId = $this->Geonames->find('all', array('conditions' => array('Geonames.postal_code LIKE' => $zipcode . '%')));
};
if (isset($city)) {
$cityId = $this->Geonames->find('all', array('conditions' => array('Geonames.place_name LIKE' => '%' . $city . '%')));
};
$zipTemp = Hash::extract($cityId, '{n}.Geonames.postal_code');
$cityTemp = Hash::extract($cityId, '{n}.Geonames.place_name');
//im array $zipAndCity Paare bilden: array( int (0) => array('Zipcode' => 'blub', 'City' => 'blub'), int (1) ...)
$zipAndCity = array();
foreach($zipTemp as $key => $item) {
$key = "Zipcode";
$zipAndCity[] = array($key => $item);
};
$index = 0;
foreach($cityTemp as $key => $item) {
$key = "City";
$zipAndCity[$index] += array($key => $item);
$index += 1;
};
//sortieren nach Zipcode und vars setzen
sort($zipAndCity);
$zipAndCity = json_encode($zipAndCity);
echo json_encode($zipAndCity);
}
}
但现在真正奇怪的事情是：我机器上的 Firefox V21.0 在 dev 和 live 中也可以，但在一些使用 Firefox V21.0 的朋友的机器上，它也只能在 dev 中工作。
我在标题中进行了研究。带有工作 AJAX 调用的标头：
请求头
Accept application/json, text/javascript, */*; q=0.01
Accept-Encoding gzip, deflate
Accept-Language de-de,de;q=0.8,en-us;q=0.5,en;q=0.3
Cache-Control no-cache
Connection keep-alive
Content-Length 22
Content-Type application/x-www-form-urlencoded; charset=UTF-8
Cookie __utma=117500061.1300628794.1370282236.1370505293.1370510250.8; __utmz=117500061.1370282236.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none); __atuvc=53%7C23; CAKEPHP=1923d0295000a4abdbc37ba811bbbad5; __utmb=117500061.2.10.1370510250; __utmc=117500061
Host domain.de
Pragma no-cache
Referer http://domain.de/Posts
User-Agent Mozilla/5.0 (Windows NT 6.1; WOW64; rv:21.0) Gecko/20100101 Firefox/21.0
X-Requested-With XMLHttpRequest
响应头
Cache-Control max-age=60
Connection close
Content-Encoding gzip
Content-Length 140
Content-Type text/html
Date Thu, 06 Jun 2013 09:17:43 GMT
Expires Thu, 06 Jun 2013 09:18:43 GMT
Server Apache
Vary Accept-Encoding
X-Powered-By PHP/5.2.17
AJAX 调用失败的标头：
请求头
Accept application/json, text/javascript, */*; q=0.01
Accept-Encoding gzip, deflate
Accept-Language de-de,de;q=0.8,en-us;q=0.5,en;q=0.3
Cache-Control no-cache
Connection keep-alive
Content-Length 22
Content-Type application/x-www-form-urlencoded; charset=UTF-8
Cookie __utma=117500061.1398540368.1370505971.1370505971.1370509889.2; __utmc=117500061; __utmz=117500061.1370505971.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none); __atuvc=3%7C23; CAKEPHP=99cb20f648db7b7c89855f43c5c453de; __utmb=117500061.3.10.1370509889
DNT 1
Host domain.de
Origin http://www.domain.de
Pragma no-cache
Referer http://www.domain.de/Posts
User-Agent Mozilla/5.0 (Windows NT 6.1; WOW64; rv:21.0) Gecko/20100101 Firefox/21.0
此外，在应写入 plz-results 的响应正文中，有“刷新页面，以获取源代码：http ://domain.de/Posts/plzResults ”
响应头
Cache-Control no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Connection close
Content-Encoding gzip
Content-Length 20
Content-Type text/html; charset=UTF-8
Date Thu, 06 Jun 2013 09:27:54 GMT
Expires Mon, 26 Jul 1997 05:00:00 GMT
Last-Modified Thu, 06 Jun 2013 09:27:54 GMT
Server Apache
Vary Accept-Encoding
X-Powered-By PHP/5.2.17
我的问题是：我怎样才能在每个浏览器上获得有效的 ajax 调用？谢谢 ：）
附加说明 1：
在对不同的计算机进行进一步调查后，有时在 IE 中也会出现问题。测试的是现场系统。