How to respond to an HTTP OPTIONS request on a JSON-RPC server

Question

How to respond to an HTTP OPTIONS request on a JSON-RPC server

My JSON-RPC client (browser using dojo JSON-RPC) makes a JSON-RPC request (dojo.callRemote) to my JSON-RPC server at myserver.com/12345 (Python 2.5, SimpleJSONRPCServer).

Then the server receives an HTTP request with the heading "OPTIONS / HTTP / 1.1", which by default it cannot handle, so I wrote a special handler for this request.

The request header from the browser says:

OPTIONS / HTTP/1.1 Host: myserver:12345 User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.8) Gecko/20100214 Linux Mint/8 (Helena) Firefox/3.5.8 (.NET CLR 3.5.30729) Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-us,en;q=0.7,de;q=0.3 Accept-Encoding: gzip,deflate Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7 Keep-Alive: 300 Origin: http://myserver.com Access-Control-Request-Method: POST Access-Control-Request-Headers: x-requested-with

And the answer I'm posting is as follows:

 HTTP/1.0 200 OK Server: BaseHTTP/0.3 Python/2.5 Date: Mon, 05 Apr 2010 18:58:34 GMT Access-Control-Allow-Method: POST Access-Control-Allow-Headers: POST Allow: POST Content-Type: application/json-rpc Content-length: 0

But in the browser, I get the following error:

Error: unable to download http://myserver.com:12345 status: 0

I checked that the JSON service is accessible from the network.

Now the question is, does the browser (say, Firefox) expect a response from the responder-responder? Or maybe the problem lies elsewhere?

+4

python http dojo json-rpc

Jessicatz fairymeadow Apr 05 '10 at 19:05

source share

3 answers

add code and try, it works fine for me:

 class CGIHTTPRequestHandler(SimpleHTTPServer.SimpleHTTPRequestHandler): ... ... def do_OPTIONS(self): self.send_response(200, "ok") self.send_header('Access-Control-Allow-Origin', self.headers.dict['origin']) self.send_header('Access-Control-Allow-Methods', 'POST, OPTIONS')

+2

seewind Jan 30 '11 at 10:18

source share

Check out my code. It works for client javascript code running in a Chrome browser.

 class MyHandler(BaseHTTPRequestHandler): def do_OPTIONS(self): self.send_response(200, "ok") self.send_header('Access-Control-Allow-Origin', '*') self.send_header('Access-Control-Allow-Methods', 'GET, POST, OPTIONS') self.send_header("Access-Control-Allow-Headers", "X-Requested-With") def do_GET(self): self.send_response(200) self.send_header('Access-Control-Allow-Origin', '*') self.send_header('Content-type', 'text/html') self.end_headers() self.wfile.write("<html><body>Hello world!</body></html>") self.connection.shutdown(1)