jQuery ajax POST Request throws 405 Method Not Allowed on RESTful WCF

Question

I am sending a post request to a RESTFUL WCF service application   I am able to successfully send a POST request through Fiddler    However when I do this through the jQuery Ajax method the function returns the following to the Chrome Developer Console   OPTIONS http   www example com testservice service1 svc GetData 405  Method Not Allowed  jquery min js 6   But then a second after logs   Object  d   You entered 10   testpost html 16   What this tells me is that jQuery is sending a OPTIONS request  which fails  and then sending a POST request which returns the expected data    My jQuery Code     ajax             type   POST     GET or POST or PUT or DELETE verb      url   http   www example com testservice service1 svc GetData      Location of the service           data     value   10       Data sent to server     contentType  application json       dataType   json     Expected data format from server         processdata  false      success  function  msg     On Successfull service call            console log msg              error  function  xhr    console log xhr responseText        When Service call fails                    I am using jQuery version 2 0 2   Any help on why this error is occurring would be a great help

User · Accepted Answer

Your code is actually attempting to make a Cross-domain  CORS  request  not an ordinary POST   That is  Modern browsers will only allow Ajax calls to services in the same domain as the HTML page   Example  A page in http   www example com myPage html can only directly request services that are in http   www example com  like http   www example com testservice etc  If the service is in other domain  the browser won t make the direct call  as you d expect   Instead  it will try to make a CORS request   To put it shortly  to perform a CORS request  your browser    Will first send an OPTION request to the target URL And then only if the server response to that OPTION contains the adequate headers  Access-Control-Allow-Origin is one of them  to allow the CORS request  the browse will perform the call  almost exactly the way it would if the HTML page was at the same domain    If the expected headers don t come  the browser simply gives up  like it did to you      How to solve it  The simplest way is to enable CORS  enable the necessary headers  on the server   If you don t have server-side access to it  you can mirror the web service from somewhere else  and then enable CORS there

User · Answer

You can create the required headers in a filter too    WebFilter urlPatterns   rest     public class AllowAccessFilter implements Filter        Override     public void doFilter ServletRequest sRequest  ServletResponse sResponse  FilterChain chain  throws IOException  ServletException           System out println  in AllowAccessFilter doFilter            HttpServletRequest request    HttpServletRequest sRequest          HttpServletResponse response    HttpServletResponse sResponse          response setHeader  Access-Control-Allow-Origin                 response setHeader  Access-Control-Allow-Methods    GET  POST  PUT            response setHeader  Access-Control-Allow-Headers    Content-Type             chain doFilter request  response

User · Answer

For same error code i had quite different reason  I m sharing here to help  I had web api action like below   public IHttpActionResult GetBooks  int id    I changed the method to accept two parameters category and author so i changed the parameters as below  i also put the attribute  Httppost    public IHttpActionResult GetBooks  int category  int author    I also changed ajax options like below and at this point i start getting error 405 method not allowed  var options         url    api books GetBooks       type   POST       dataType   json       cache  false      traditional  true       data            category  1          author  15           When i created class for web api action parameters like below error was gone  public class BookParam       public int Category   get  set        public int Author   get  set      public IHttpActionResult GetBooks  BookParam param

User · Answer

This Worked for me In Web config add below script  x000D   x000D   lt system webServer gt     lt modules runAllManagedModulesForAllRequests  true   gt       lt remove name  WebDAVModule   gt     lt  modules gt     lt handlers accessPolicy  Read  Execute  Script  gt       lt remove name  WebDAV    gt       lt remove name  ExtensionlessUrlHandler-Integrated-4 0    gt       lt remove name  OPTIONSVerbHandler    gt       lt remove name  TRACEVerbHandler    gt        lt add name  ExtensionlessUrlHandler-Integrated-4 0  path               verb  GET HEAD POST DEBUG PUT DELETE PATCH OPTIONS           type  System Web Handlers TransferRequestHandler           preCondition  integratedMode runtimeVersionv4 0    gt     lt  handlers gt    lt  system webServer gt  x000D   x000D   x000D   Also in RouteConfig cs Change settings AutoRedirectMode   RedirectMode Permanent  To settings AutoRedirectMode   RedirectMode Off  Hope it helps you or some one

User · Answer

You must add this code in global aspx     protected void Application BeginRequest object sender  EventArgs e                        HttpContext Current Response AddHeader  Access-Control-Allow-Origin                     if  HttpContext Current Request HttpMethod     OPTIONS                                 HttpContext Current Response AddHeader  Cache-Control    no-cache                    HttpContext Current Response AddHeader  Access-Control-Allow-Methods    GET  POST                    HttpContext Current Response AddHeader  Access-Control-Allow-Headers    Content-Type  Accept                    HttpContext Current Response AddHeader  Access-Control-Max-Age    1728000                    HttpContext Current Response End

[jquery] jQuery .ajax() POST Request throws 405 (Method Not Allowed) on RESTful WCF

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