help on pickle tool
Hi, i have client-server application which is written in python using XMLRPC protocol. The existing client is a command line. Now client application we are converting it as Web UI using java. I have seen some problems in writing a java client. At the server for each request from client, the server sends a response in hashtable and is serialized using "pickle". The python function we call at the server is pickle.dumps(r, 2) -- where r is a hash table which needs to be serialized At the client (existing client which in python) we use this call to get the original data. r = pickle.loads(result) Since i am writing this client as Web UI client using java, i am not able to deserialize this data using java function "ObjectInputStream" and "ObjectInputStream" which are most common functions for deserialization and i getting error as invalid header. Is it possible to deserialize the data by java which serialized by Python or is there any compatibility issue. Is there any equivalent pickle tool on java which supports this operation. so that i can use across languages. Because of this problem i am not able to proceed further. Any body has any pointers for this problem. Any help is highly appreciated Thanks in advance regards Virg -- http://mail.python.org/mailman/listinfo/python-list
Re: help on pickle tool
Hi, The data is simple dictionary with one or more keys. If i use YAML at the client (webui) do i have to change serialisation method to YAML at server also. Without changing serialisation method at server, can i use any of the deserialisation methods at the client. We cannot change the serialisation methods at the server since it is not under our control. Thanks & reagards virg hanumizzle wrote: > On 5 Oct 2006 21:52:56 -0700, virg <[EMAIL PROTECTED]> wrote: > > Hi, > > i have client-server application which is written in python using > > XMLRPC protocol. The existing client is a command line. Now client > > application we are converting it as Web UI using java. I have seen some > > problems in writing a java client. At the server for each request from > > client, the server sends a response in hashtable and is serialized > > using "pickle". The python function we call at the server is... > > What kind of data are we talking about? Is it strictly dictionary / > list stuff or is it more complex (functions & other objects)? I can > see 2 possible options: Jython or YAML. (I have been answering a lot > of questions re: serialization today and mentioned YAML in all of them > :)) -- http://mail.python.org/mailman/listinfo/python-list
Re: help on pickle tool
At the server, based on client request it does some computations , it sends the result as dictionary (serialized) to the client. hanumizzle wrote: > On 6 Oct 2006 01:41:48 -0700, virg <[EMAIL PROTECTED]> wrote: > > Hi, > > The data is simple dictionary with one or more keys. If i use YAML at > > the client (webui) do i have to change serialisation method to YAML at > > server also. Without changing serialisation method at server, can i use > > any of the deserialisation methods at the client. We cannot change the > > serialisation methods at the server since it is not under our control. > > Oh, poopy. > > What do you have at the server end? > > -- Theerasak -- http://mail.python.org/mailman/listinfo/python-list
Re: help on pickle tool
Yes your are right. I will send a dictionary object from the server to the client. I already have client which is written in python. But we are migrating the python client which is a command line tool to Web UI client (java). If it is possible to call python function from java, i need to read more about jython, i am new to this. hanumizzle wrote: > On 6 Oct 2006 02:03:07 -0700, virg <[EMAIL PROTECTED]> wrote: > > At the server, based on client request it does some computations , it > > sends the result as dictionary (serialized) to the client. > > If I interpret your message correctly, you are receiving a Python > dictionary object from the server. Yes? In this case, I guess it might > be necessary to use Jython. I'm drawing a blank otherwise. > > (This may be naive, but can you write the client in Python as well?) > > -- Theerasak -- http://mail.python.org/mailman/listinfo/python-list
Re: help on pickle tool
Hi, Yes, using python client we are able deserialize data using r = pickle.loads(result). where result is a response from the server and r is a dictionary after deserialization. For serialisation at the server written in python using pickle.dumps(result, 2) Now we are developing web based Client using java. So we are writing client in java. If server and client are in python we dont see any problems since we are using same serialisation tool "pickle". Now we have seen problems because we are writing client in java. we did not find equivalent function on java for this tool pickle. If i use standard java desrialisation functions i am getting error as invalid header becasue of incompatibility between python and java. Please help me if you have any clue regards, - Virg hanumizzle wrote: > On 6 Oct 2006 02:29:59 -0700, virg <[EMAIL PROTECTED]> wrote: > > Yes your are right. I will send a dictionary object from the server to > > the client. > > I already have client which is written in python. But we are migrating > > the python client which is a command line tool to Web UI client > > (java). > > Please explain 'Web UI'. Can Python perform an equivalent function? > > -- Theerasak -- http://mail.python.org/mailman/listinfo/python-list
