问题
Short question: is there a way to make a jsonp request to a server, capture the request, but not parse it as javascript? I am using dataType: "jsonp text" in jQuery 1.5 but it is not working.
I'm trying access a cross-domain URL via AJAX with jsonp. The problem is that the other domain (a directory listing at my university) is very old and I doubt the server supports jsonp.
- In Firefox, I get a "XML tag name mismatch (expected META)" error. In chrome I get a "Uncaught SyntaxError Unexpected token <" both pointing to a file corresponding to my AJAX request . The error string from the error callback is "parsererror".
- I can't do a normal AJAX call -- when I change datatype to just "text" or remove it all together, the other domain complains that the user is not authenticated and redirects to a login page -- even if I've already logged in browser side. When dataType is jsonp, this doesn't happen.
- I know the server needs to support JSONP, and I don't think it does, but when I change dataType to JSONP, I can see the response page resources show up in both Chrome and Firefox -- so the server actually sends the response to the browser (a static HTML webpage + some java script) -- which contains the data I want to get at.
- The problem is that jQuery is trying to parse the response as javascript, and fails (because it's not javascript). So the data ends up in the browser -- I just need to access it!
- Using dataType: "jsonp text" which is supposed to indicate send a jsonp request and interpret the response as text makes no difference -- still a parse error.
What I want is: a way to access the response from a jsonp request as plain text. Or, if I can access the raw response from a failed jsonp request -- that would work too.
Thanks in advance!
Code:
ajax_url = 'https://somesite/?searchTerm='+query+'&searchType=lastname';
var jqxhr = $.ajax({type:"GET",
url: ajax_url,
dataType:"jsonp text",
callback: "whatever",
success:function(responseData) {
$('div#content').text( responseData.slice(0, 100) );
dbg(responseData.slice(0,100));
}})
.success(function() { alert("success"); })
.error(function(obj, errStr) { alert("error"); dbg("error: " + errStr + "test: " + test.responseText + this.responseTxt);})
.complete(function() { alert("complete"); });
回答1:
What you're trying to achieve won't work: jsonp can only be used if and when the server properly embed the response in a javascript function call.
Even though the server does send the file to the browser, you won't be able to access it because of security limitations: all you can do is execute said data as a script (with a script tag) or use it as a stylesheet (using a link tag) but you'll never, ever, be able to inspect the response in raw text if it's from another domain.
I suppose you tried to get the data as xml directly and that it failed (meaning the site does not support CORS). If you cannot change code server-side, then you only have two alternatives:
- Create a proxy on your own server that would tunnel the response (your server-side script makes the actual request and sends it to the browser): same-domain will then apply from the client's point of view and you'll be able to request data as XML,
- Use flash to bypass browser's security (you can use flXHR but it seems to be a little dated now).
来源：https://stackoverflow.com/questions/9239015/send-request-as-jsonp-interpret-response-as-text-using-jquery-1-5