我正试图用Phonegap和这个问题构建一个应用程序，但我的AJAX调用遇到了一些问题。我所有的AJAX调用都返回状态0。Web视图似乎遵守了CORS规则，在我在后端设置Access-Control-Allow-Origin头之前，我的AJAX调用都不起作用。
一旦我设置了标题，一切都很好。我试着玩res/xml/config.xml和
<access origin="*" />或<access origin="*" />或<access origin="*" />或<access origin="*" />
在CCD_ 7中都是无用的并且没有区别。
我正在使用jQuery进行AJAX调用。这是我的代码
index.js
$.support.cors;
$.ajax({
crossDomain: true,
type: 'get',
url: self.endpoint + 'checkDevice/' + deviceID,
success: function(data) {
alert('success');
successCallback();
},
error: function(xhr) {
alert('failure');
errorCallback();
},
complete: function(xhr) {
$('#validateUser').hide();
}
});
res/xml/config.xml
<?xml version='1.0' encoding='utf-8'?>
<widget id="com.app.tap" version="1.0.0" xmlns="http://www.w3.org/ns/widgets" xmlns:gap="http://phonegap.com/ns/1.0">
<preference name="loglevel" value="DEBUG" />
<name>App Tap</name>
<description>
Hello World sample application that responds to the deviceready event.
</description>
<author email="support@phonegap.com" href="http://phonegap.com">
PhoneGap Team
</author>
<preference name="permissions" value="none" />
<preference name="phonegap-version" value="3.5.0" />
<preference name="orientation" value="default" />
<preference name="target-device" value="universal" />
<preference name="fullscreen" value="true" />
<preference name="webviewbounce" value="true" />
<preference name="prerendered-icon" value="true" />
<preference name="stay-in-webview" value="false" />
<preference name="ios-statusbarstyle" value="black-opaque" />
<preference name="detect-data-types" value="true" />
<preference name="exit-on-suspend" value="false" />
<preference name="show-splash-screen-spinner" value="true" />
<preference name="auto-hide-splash-screen" value="true" />
<preference name="disable-cursor" value="false" />
<preference name="android-minSdkVersion" value="7" />
<preference name="android-installLocation" value="auto" />
<gap:plugin name="org.apache.cordova.battery-status" />
<gap:plugin name="org.apache.cordova.camera" />
<gap:plugin name="org.apache.cordova.media-capture" />
<gap:plugin name="org.apache.cordova.console" />
<gap:plugin name="org.apache.cordova.contacts" />
<gap:plugin name="org.apache.cordova.device" />
<gap:plugin name="org.apache.cordova.device-motion" />
<gap:plugin name="org.apache.cordova.device-orientation" />
<gap:plugin name="org.apache.cordova.dialogs" />
<gap:plugin name="org.apache.cordova.file" />
<gap:plugin name="org.apache.cordova.file-transfer" />
<gap:plugin name="org.apache.cordova.geolocation" />
<gap:plugin name="org.apache.cordova.globalization" />
<gap:plugin name="org.apache.cordova.inappbrowser" />
<gap:plugin name="org.apache.cordova.media" />
<gap:plugin name="org.apache.cordova.network-information" />
<gap:plugin name="org.apache.cordova.splashscreen" />
<gap:plugin name="org.apache.cordova.vibration" />
<icon src="icon.png" />
<icon gap:platform="android" gap:qualifier="ldpi" src="www/res/icon/android/icon-36-ldpi.png" />
<icon gap:platform="android" gap:qualifier="mdpi" src="www/res/icon/android/icon-48-mdpi.png" />
<icon gap:platform="android" gap:qualifier="hdpi" src="www/res/icon/android/icon-72-hdpi.png" />
<icon gap:platform="android" gap:qualifier="xhdpi" src="www/res/icon/android/icon-96-xhdpi.png" />
<icon gap:platform="blackberry" src="www/res/icon/blackberry/icon-80.png" />
<icon gap:platform="blackberry" gap:state="hover" src="www/res/icon/blackberry/icon-80.png" />
<icon gap:platform="ios" height="57" src="www/res/icon/ios/icon-57.png" width="57" />
<icon gap:platform="ios" height="72" src="www/res/icon/ios/icon-72.png" width="72" />
<icon gap:platform="ios" height="114" src="www/res/icon/ios/icon-57-2x.png" width="114" />
<icon gap:platform="ios" height="144" src="www/res/icon/ios/icon-72-2x.png" width="144" />
<icon gap:platform="webos" src="www/res/icon/webos/icon-64.png" />
<icon gap:platform="winphone" src="www/res/icon/windows-phone/icon-48.png" />
<icon gap:platform="winphone" gap:role="background" src="www/res/icon/windows-phone/icon-173-tile.png" />
<gap:splash gap:platform="android" gap:qualifier="port-ldpi" src="www/res/screen/android/screen-ldpi-portrait.png" />
<gap:splash gap:platform="android" gap:qualifier="port-mdpi" src="www/res/screen/android/screen-mdpi-portrait.png" />
<gap:splash gap:platform="android" gap:qualifier="port-hdpi" src="www/res/screen/android/screen-hdpi-portrait.png" />
<gap:splash gap:platform="android" gap:qualifier="port-xhdpi" src="www/res/screen/android/screen-xhdpi-portrait.png" />
<gap:splash gap:platform="blackberry" src="www/res/screen/blackberry/screen-225.png" />
<gap:splash gap:platform="ios" height="480" src="www/res/screen/ios/screen-iphone-portrait.png" width="320" />
<gap:splash gap:platform="ios" height="960" src="www/res/screen/ios/screen-iphone-portrait-2x.png" width="640" />
<gap:splash gap:platform="ios" height="1136" src="www/res/screen/ios/screen-iphone-portrait-568h-2x.png" width="640" />
<gap:splash gap:platform="ios" height="1024" src="www/res/screen/ios/screen-ipad-portrait.png" width="768" />
<gap:splash gap:platform="ios" height="768" src="www/res/screen/ios/screen-ipad-landscape.png" width="1024" />
<gap:splash gap:platform="winphone" src="www/res/screen/windows-phone/screen-portrait.jpg" />
<access origin="*" />
</widget>
CORS要求"Access Control Allow Origin"标头必须在远程服务器上，而不是在应用程序本身中，这是设计的。就像你说的："一旦我设置了标题，一切都很好"
因此，在应用程序中添加此标头不会改变任何内容。
注意：您可以使用JSONP协议(http://json-p.org)它允许没有此标头的请求，但这会更改应答的格式