SVN Proxy

[Ramprasad Venkata Inala <ri...@cordys.com>]

Hi,
 
I want to write a proxy for SVN ( for SVN protocol )so that it passes
through our versioning system. For the same I need to know the SVN
protocol, which I understood from the protocol document placed in the
SVN sources. There is some hiccup while handshaking with the client. Let
me explain in detail what I do.
 
When a client ( using a subclipse ) tries to connect to the SVN  proxy(
a socket server program written in java ) the proxy accepts the
connection and spawns a new thread that will handle further the requests
for this client, so each client will have a thread that would handle the
streams. When server socket accepts the client request it sends back
response in the format specified below.
( success ( 1 2 ( ANONYMOUS ) ( edit-pipeline ) ) ) ( 2 ANONYMOUS ( ) (
) )
Spaces also do matter in the above response.
 
The client responds back with the below response
( 2 ( edit-pipeline ) 28:svn:///d:/svnrep/SVNProtocol )
where svnrep is SVN repository and SVNProtocol is the eclipse project.
 
Then the proxy sends a message in this format again to the client
( ( ( 31:d:/svnrep/SVNProtocol ) ) ( ANONYMOUS ( ) ) )
 
Then the problem starts here again when the client responds back then it
tries to open up another socket rather sending requests on the same
stream which is a diversion from the connection establishment. 
 
Could somebody help me in this regard and explain me the protocol
syntax.
 
Regards
Ram

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Re: SVN Proxy

[Max Bowsher <ma...@ukf.net>]

Erik Huelsmann wrote:
>>> Then the problem starts here again when the client responds back then it
>>> tries to open up another socket rather sending requests on the same
>>> stream which is a diversion from the connection establishment.
>>
>> I suspect the client is giving up faced with the weird responses you are
>> giving it, and re-trying.
>
> Isn't this the second RA session being opened for a commit/update 
> operation?

No. You are correct that operations open multiple RA sessions, but in the 
specific protocol exchange that was described, the first session had not 
even been fully initialized.

Max.


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Re: SVN Proxy

[Erik Huelsmann <eh...@gmail.com>]

> > Then the problem starts here again when the client responds back then it
> > tries to open up another socket rather sending requests on the same
> > stream which is a diversion from the connection establishment.
> 
> I suspect the client is giving up faced with the weird responses you are
> giving it, and re-trying.

Isn't this the second RA session being opened for a commit/update operation?

Ramprasad, you can't expect 1 client operation to open just 1
connection: some operations open up to 5 connections...


bye,


Erik.

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Re: SVN Proxy

[Max Bowsher <ma...@ukf.net>]

Ramprasad Venkata Inala wrote:
> Hi,
>
> I want to write a proxy for SVN ( for SVN protocol )so that it passes
> through our versioning system. For the same I need to know the SVN
> protocol, which I understood from the protocol document placed in the
> SVN sources. There is some hiccup while handshaking with the client. Let
> me explain in detail what I do.
>
> When a client ( using a subclipse ) tries to connect to the SVN  proxy(
> a socket server program written in java ) the proxy accepts the
> connection and spawns a new thread that will handle further the requests
> for this client, so each client will have a thread that would handle the
> streams. When server socket accepts the client request it sends back
> response in the format specified below.

> ( success ( 1 2 ( ANONYMOUS ) ( edit-pipeline ) ) )

Right.

> ( 2 ANONYMOUS ( ) ( ) )

What is this?? I do not see this in either the protocol document or in 
captured traces of network traffic.

> The client responds back with the below response
> ( 2 ( edit-pipeline ) 28:svn:///d:/svnrep/SVNProtocol )

OK.

> Then the proxy sends a message in this format again to the client
> ( ( ( 31:d:/svnrep/SVNProtocol ) ) ( ANONYMOUS ( ) ) )

Again, what is this?? I do not see this in either the protocol document or 
in captured traces of network traffic.

> Then the problem starts here again when the client responds back then it
> tries to open up another socket rather sending requests on the same
> stream which is a diversion from the connection establishment.

I suspect the client is giving up faced with the weird responses you are 
giving it, and re-trying.

Max.


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