<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.js" type="text/javascript"></script>
<script>
$.get("http://example.com/", function(data) {
alert(data);
});
</script>
它对那个URL做一个OPTIONS请求，然后回调永远不会被调用任何东西。
当它不是跨域时，它工作得很好。
jQuery不应该只是调用一个<script>节点，然后在它加载时做回调吗?我知道我将无法得到的结果(因为它是跨域)，但这是可以的;我只想让电话接通。这是bug，还是我做错了什么?
当前回答
如果你想POST
确保JSON。Stringify您的表单数据和发送文本/纯。
<form id="my-form" onSubmit="return postMyFormData();">
<input type="text" name="name" placeholder="Your Name" required>
<input type="email" name="email" placeholder="Your Email" required>
<input type="submit" value="Submit My Form">
</form>
function postMyFormData() {
var formData = $('#my-form').serializeArray();
formData = formData.reduce(function(obj, item) {
obj[item.name] = item.value;
return obj;
}, {});
formData = JSON.stringify(formData);
$.ajax({
type: "POST",
url: "https://website.com/path",
data: formData,
success: function() { ... },
dataType: "text",
contentType : "text/plain"
});
}
其他回答
在我的例子中，这个问题与CORS无关，因为我正在向同一个web服务器发出jQuery POST。数据是JSON，但我省略了dataType: ' JSON '参数。
正如上面David Lopes的回答所示，我没有(也没有添加)contentType参数。
如果你想POST
确保JSON。Stringify您的表单数据和发送文本/纯。
<form id="my-form" onSubmit="return postMyFormData();">
<input type="text" name="name" placeholder="Your Name" required>
<input type="email" name="email" placeholder="Your Email" required>
<input type="submit" value="Submit My Form">
</form>
function postMyFormData() {
var formData = $('#my-form').serializeArray();
formData = formData.reduce(function(obj, item) {
obj[item.name] = item.value;
return obj;
}, {});
formData = JSON.stringify(formData);
$.ajax({
type: "POST",
url: "https://website.com/path",
data: formData,
success: function() { ... },
dataType: "text",
contentType : "text/plain"
});
}
根据MDN，
Preflighted requests Unlike simple requests (discussed above), "preflighted" requests first send an HTTP OPTIONS request header to the resource on the other domain, in order to determine whether the actual request is safe to send. Cross-site requests are preflighted like this since they may have implications to user data. In particular, a request is preflighted if: It uses methods other than GET or POST. Also, if POST is used to send request data with a Content-Type other than application/x-www-form-urlencoded, multipart/form-data, or text/plain, e.g. if the POST request sends an XML payload to the server using application/xml or text/xml, then the request is preflighted. It sets custom headers in the request (e.g. the request uses a header such as X-PINGOTHER)
OPTIONS来自http://www.w3.org/TR/cors/，请参阅http://metajack.im/2010/01/19/crossdomain-ajax-for-xmpp-http-binding-made-easy/了解更多信息
只需将“application/json”更改为“text/plain”，不要忘记json .stringify(request):
var request = {Company: sapws.dbName, UserName: username, Password: userpass};
console.log(request);
$.ajax({
type: "POST",
url: this.wsUrl + "/Login",
contentType: "text/plain",
data: JSON.stringify(request),
crossDomain: true,
});
