jQuery Ajax POST不成功

Question

I'm unable to successfully post using jquery's ajax functionality.

URL of the running page is http://localhost:9999, URL of the target (web service) is http://localhost:8080. No the ports aren't the same, they are 9999 and 8080 respectively.

Below is the request and jquery ajax code.

Request:

OPTIONS /profile/set_member HTTP/1.1
Host: localhost:8080
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.8) Gecko/20100722 Firefox/3.6.8
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-us,en;q=0.5
Accept-Encoding: gzip,deflate
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive: 115
Connection: keep-alive
Origin: http://localhost:9999
Access-Control-Request-Method: POST

jQuery ajax code:

$.ajax({ 
        type: "POST", url: "http://localhost:8080/profile/set_member", 
        contentType: "application/json", data: member, 
        error: function(){ alert('Update failed!'); }, 
        processData: false, 
        success: function(){ alert('Update successful!'); }
});

Answer 1

What handler gets called? The success or error handler? Can you elaborate what "doesn't work" means?

You probably want alert more information in your error handler, like so:

error: function(XMLHttpRequest, textStatus, errorThrown) {
   //console.log is better at least for debugging. You can change this back to alert 
   //when your code goes into production
   console.log("Update unsuccessful. Status: ", textStatus, " error thrown: ", errorThrown);
}

textStatus should give you an idea as to what the problem could be. Possible values are "timeout", "error", "notmodified" and "parsererror". Once you figure out the actual error, please update the question.

Also if you have Firebug check the Net tab to see the request and the response. A few common sources of errors:

• Violating same-origin policy. You cannot make an AJAX to a different URL from the parent page.
• Server-side errors. If your server returns something like a 500 response code, the request will fail.
• Parsing errors. If you're expecting a specific response format like json or xml, and if the response is not in that format, the AJAX request will be unsuccessful.