ajax problem - 200 OK in firebug but red message with no response body

Question

I have small ajax problem related to cross domain as i see it.

On localmachine i created html example with some ajax: in registration text field user types \'username\',

Answer 1

For me, It was web api(c# .NET) request and cors was not enabled. Added header for cors on controller and it solved the problem.

[EnableCors(origins: "*", headers: "*", methods: "*")]

Answer 2

You need to use a domain-relative URL in your Ajax request:

/Dinamicki1/UsernameServlet?username=zik

Or a context-relative URL (assuming that the page is served from /Dinamicki1):

UsernameServlet?username=zik

With regard to "Ajax tutorial for Java", start here: How to use Servlets and Ajax?

Answer 3

I figured out how to solve it from this site:

1. "To allow directory browsing via Apache Tomcat change the parameter "listings" in the file conf/web.xml from false to true."

2. Call your page not as C:/Documents and Settings/.../page.html but as localhost:8080/your_servlet_name (page is better named index.html).

This way, you will be able to make AJAX requests to localhost:8080/your_servlet_name/something_else.

Answer 4

You cannot use AJAX to read replies from other domains.

Your HTML must be on the same server (and same domain, port, and protocol) as the AJAX servlet.

Answer 5

A solution that worked for me was that I had to add "www" to the url! I was using URL Rewrite, so every URL that I had (image, js, get, load, post), I needed to use full url, but it was missing "www"!

Answer 6

The 200 status reported in Firebug does not indicate the validity of the cross-domain ajax call, be it successful or not.

You might want to try using a proxy method to perform the call.

E.g. JavaScript: Use a Web Proxy for Cross-Domain XMLHttpRequest Calls