javascript Jquery ajax() 跨域远程服务器在 IE8 中不起作用
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Jquery ajax() cross domain remote server does not work in IE8
提问by
I have a script that makes an ajax request to a remote server, that returns a plain text response. It works fine in all browsers except IE8 (shocker).
我有一个脚本向远程服务器发出 ajax 请求，返回纯文本响应。它在除 IE8 (shocker) 之外的所有浏览器中都能正常工作。
Here's the code:
这是代码：
$.ajax({
url: 'abc.com/?somerequest=somevalue',
cache: false,
type: 'POST',
data:{
sub: 'uploadprogress',
uploadid: this.uploadId
},
dataType: 'html',
success: this.uploadProgressResp,
error: this.errorResp
});
In IE8, it returns a "No Transport" error. I suppose it's because IE8 doesn't allow cross domain requests?
在 IE8 中，它返回“无传输”错误。我想这是因为 IE8 不允许跨域请求？
NOTE:I didn't write the API for the remote server. If I did, I would return JSON response rather than a plain text response. So yes, the dataType is supposed to be HTML rather than JSON.
注意：我没有为远程服务器编写 API。如果我这样做了，我会返回 JSON 响应而不是纯文本响应。所以是的，dataType 应该是 HTML 而不是 JSON。
回答by SpaceBison
Try adding this somewhere before the ajax call- Bestplace for it is before any other JavaScript executes!
尝试在ajax 调用之前的某个地方添加它-最好的地方是在任何其他 JavaScript 执行之前！
jQuery.support.cors = true;
Without this, the "No transport" error will be thrown by Internet Explorer. The error message itself is rather confusing, but by default cross-domain ajax requests are blocked by IE, but do not appear to be so by other browsers - or at least, Chrome and Firefox will function to that effect.
如果没有这个，Internet Explorer 将抛出“No transport”错误。错误消息本身相当令人困惑，但默认情况下，跨域 ajax 请求会被 IE 阻止，但其他浏览器似乎不会这样做 - 或者至少，Chrome 和 Firefox 会起到这种作用。
I shared your pain on this one, historically. Quite confident that it will sort your issue.
从历史上看，我分享了您对此的痛苦。非常有信心它会解决您的问题。
回答by Nicolo
I know this is very old question, but sadly people still using IE8/9 and sometimes we have to support them :/
我知道这是一个很老的问题，但遗憾的是人们仍在使用 IE8/9，有时我们必须支持他们：/
This is best solution I was able to find for this issue:
这是我为这个问题找到的最佳解决方案：
https://github.com/MoonScript/jQuery-ajaxTransport-XDomainRequest
https://github.com/MoonScript/jQuery-ajaxTransport-XDomainRequest
Just include following script in your html and that's it, you don't have to modify anything in your jQuery request
只需在您的 html 中包含以下脚本即可，您无需在 jQuery 请求中修改任何内容
<script type="text/javascript" src="//cdnjs.cloudflare.com/ajax/libs/jquery-ajaxtransport-xdomainrequest/1.0.3/jquery.xdomainrequest.min.js"></script>
<script type="text/javascript" src="//cdnjs.cloudflare.com/ajax/libs/jquery-ajaxtransport-xdomainrequest/1.0.3/jquery.xdomainrequest.min.js"></script>
Limitations:
限制：
- IE6/7 isn't supported, only IE8 and IE9
- Minimum jQuery version is 1.5
- When using POST method in IE8/9,
Content-Typeheader always will be set totext/plain - Current website and requested URL both must be using same protocol (HTTP->HTTPS or HTTPS->HTTP requests will not work)
- 不支持 IE6/7，仅支持 IE8 和 IE9
- 最低 jQuery 版本为 1.5
- 在 IE8/9 中使用 POST 方法时，
Content-Typeheader 总是会被设置为text/plain - 当前网站和请求的 URL 都必须使用相同的协议（HTTP->HTTPS 或 HTTPS->HTTP 请求将不起作用）
