[web2py] Re: Consuming a web2py web service in C#?
This is what I have concluded...
The problem is that many Windows based JSON-RPC serializers
(Including jayrock) and proxy's append a 3 byte UTF-8 BOM (Byte Order
Mark) to the beginning of the resulting encoded JSON text that is sent
in the body of the HTML request. Note that this is not a feature
added by jayrock or any other JSON-RPC library, it is a Windows OS
specific encoding practice for UTF-8 strings. Python does not bother
with this because UTF-8 is it's natural language encoding and assumes
this without being told by use of the BOM.
So, what should be sent as '{params:hello,id:
1,method:echo}' for example is sent as '\xef\xbb
\xbf{params:hello,id:1,method:echo}' by jayrock.
Neither simplejson or web2py's serve_jsonrpc function (in tools.py)
check for this UTF-8 BOM when decoding the JSON string.
I am not 100% sure where this problem should be fixed in the code, in
simplejson's decode function or web2py's serve_jsonrpc function, but I
made these changes to the code in web2py's serve_jsonrpc function:
From:
--
request = self.environment['request']
methods = self.jsonrpc_procedures
data =
simplejson.loads(request.body.read())
id, method, params = data['id'], data['method'], data.get('params','')
To: (added: import codecsto the top of the file)
--
request = self.environment['request']
methods = self.jsonrpc_procedures
#
added
theBody = request.body.read()
if theBody.startswith( codecs.BOM_UTF8 ):
theBody = theBody[3:]
#data =
simplejson.loads(request.body.read())
data = simplejson.loads(theBody)
id, method, params = data['id'], data['method'], data.get('params','')
This strips out the 3 byte UTF-8 BOM at the beginning of the body of
the HTML and calls from jayrock's JSON-RPC client's work just fine.
This is something that needs to be fixed and included in web2py's
source. Or perhaps the fix belongs in the simplejson library?
On May 20, 4:23 pm, Matt ima...@gmail.com wrote:
Anyone using web2py as the web service and then consuming the service
via json-rpc in C#? I imagine this is possible, but seem to have quite
some time trying to get this to work.
I'm usingjayrockas my json-rpc C# parser and setting the url to the
service to be my exposed web2py service but can't seem to get the
data.
I'd be interested to know if anyone is doing something similar.
Thanks.
-m
[web2py] Re: Consuming a web2py web service in C#?
If you go to the web2py server admin app e.g. http://127.0.0.1:8000/admin and login you should see the name of the app containing the service and an errors link after the name. Click that and you will see the errors page and be able to see the stack trace. When running as a Python process you can put print statements in your controller to get an idea of what the parameters look like coming into the request. The output should go out on the terminal you ran python web2py.py from. Be sure to comment out the print statements before embedding in a web server such as apache with WSGI or you will get tickets from the print statement.
[web2py] Re: Consuming a web2py web service in C#?
I wish I was at the point of resolving encoding issues. Right now every time I call the service, the only thing I get in the response is the web2py Ticket Issued html page returned as a string. Any suggestions? On May 22, 9:42 am, nick name i.like.privacy@gmail.com wrote: I am doing something similar, but using the .NET built in JSON DataContract serializer. The things I've hit so far: a) Anything other than a 200 return will raise an exception (understandable), but not give you access to the returned json (bad; e.g. 403 responses often have useful data with them) b) dates, times, timespans use an MS extended encoding (\/Date(xxx)\/) that simplejson cannot generate on the server side (I've posted an ugly patch here on the list before) c) dictionaries have a super-weird encoding from the .NET side; I opted instead to send a list of keys and a list of values from the server. These may or may not be relevant to jayrock.
[web2py] Re: Consuming a web2py web service in C#?
Can you post the error messages?
[web2py] Re: Consuming a web2py web service in C#?
I am doing something similar, but using the .NET built in JSON DataContract serializer. The things I've hit so far: a) Anything other than a 200 return will raise an exception (understandable), but not give you access to the returned json (bad; e.g. 403 responses often have useful data with them) b) dates, times, timespans use an MS extended encoding (\/Date(xxx)\/) that simplejson cannot generate on the server side (I've posted an ugly patch here on the list before) c) dictionaries have a super-weird encoding from the .NET side; I opted instead to send a list of keys and a list of values from the server. These may or may not be relevant to jayrock.
