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POTrac JSON RPC Issue when using JQuery AJAX
 

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  1. POTrac JSON RPC Issue when using JQuery AJAX
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    <p>I'm trying to access some data through JSON RPC using the trac XMLRPCPlugin using my own method 'plugged' into one of it's extension points on the server side and a JQuery AJAX request on the client side. I can access the data fine using the Firefox poster extension however using the JQuery ajax request gives an error message. The error message I get is:</p> <pre><code>Trac[web_ui] DEBUG: RPC incoming request of content type 'application/json' dispatched to &lt;tracrpc.json_rpc.JsonRpcProtocol object at 0x03CA51F0&gt; Trac[web_ui] DEBUG: RPC(JSON-RPC) call by 'PaulWilding' Trac[json_rpc] ERROR: RPC(json) decode error Traceback (most recent call last): File "build\bdist.win32\egg\tracrpc\json_rpc.py", line 148, in parse_rpc_request data = json.load(req, cls=TracRpcJSONDecoder) File "C:\Python27\Lib\json\__init__.py", line 278, in load **kw) File "C:\Python27\Lib\json\__init__.py", line 339, in loads return cls(encoding=encoding, **kw).decode(s) File "build\bdist.win32\egg\tracrpc\json_rpc.py", line 99, in decode obj = json.JSONDecoder.decode(self, obj, *args, **kwargs) File "C:\Python27\Lib\json\decoder.py", line 366, in decode obj, end = self.raw_decode(s, idx=_w(s, 0).end()) File "C:\Python27\Lib\json\decoder.py", line 384, in raw_decode raise ValueError("No JSON object could be decoded") ValueError: No JSON object could be decoded Trac[web_ui] ERROR: RPC(JSON-RPC) Error Traceback (most recent call last): File "build\bdist.win32\egg\tracrpc\web_ui.py", line 143, in _rpc_process rpcreq = req.rpc = protocol.parse_rpc_request(req, content_type) File "build\bdist.win32\egg\tracrpc\json_rpc.py", line 162, in parse_rpc_request raise JsonProtocolException(e, -32700) JsonProtocolException: No JSON object could be decoded Trac[json_rpc] DEBUG: RPC(json) encoded response: {"error": {"message": "JsonProtocolException details : No JSON object could be decoded", "code": -32700, "name": "JSONRPCError"}, "result": null, "id": null} </code></pre> <p>The JQuery request is:</p> <pre><code> url: "http://localhost/Projects/jsonrpc", contentType: "application/json", dataType: "jsonp", data: {"method": "breq.getBreqs"}, type: 'POST', success: function (repsonse) { alert("success"); }, error: function (jqXHR, textStatus, errorThrown) { alert("Error: " + textStatus); } </code></pre> <p>The request I’ve got working through Poster is simply “{"method": "breq.getBreqs"}” with content set to application/json and the URL the same as above.</p> <p>I’ve read a few posts about this problem when used with a PHP proxy and tried logging the request in the parse_rpc_request in the trac rpc plugin but this only returned the same string of “” for both the working and non-working requests. </p> <p>I don't think this is a problem due to Javascript's Same Origin Policy as the request is to my trac testbed which is on my machine. However, once the plugin is deployed onto a server still inside the main network will this become an issue and if so, how should I deal with it?</p> <p>If the problem isn't to do with the Same Origin Policy does anyone know what is causing it?</p>
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