Summary: If you push a large binary and the data crosses multiple data frames, we can end up in a loop in the parser.
Test Plan:
After this change, I was able to push a 95MB binary in 7s, which seems reasonable:
>>> orbital ~/repos/INIS $ svn st
A large2.bin
>>> orbital ~/repos/INIS $ ls -alh
total 390648
drwxr-xr-x 6 epriestley admin 204B Dec 18 17:14 .
drwxr-xr-x 98 epriestley admin 3.3K Dec 16 11:19 ..
drwxr-xr-x 7 epriestley admin 238B Dec 18 17:14 .svn
-rw-r--r-- 1 epriestley admin 80B Dec 18 15:07 README
-rw-r--r-- 1 epriestley admin 95M Dec 18 16:53 large.bin
-rw-r--r-- 1 epriestley admin 95M Dec 18 17:14 large2.bin
>>> orbital ~/repos/INIS $ time svn commit -m 'another large binary'
Adding (bin) large2.bin
Transmitting file data .
Committed revision 25.
real 0m7.215s
user 0m5.327s
sys 0m0.407s
>>> orbital ~/repos/INIS $
There may be room to improve this by using `PhutilRope`.
Reviewers: wrotte, btrahan, wotte
Reviewed By: wotte
CC: aran
Differential Revision: https://secure.phabricator.com/D7798
Summary:
Ref T2230. The SVN protocol has a sensible protocol format with a good spec here:
http://svn.apache.org/repos/asf/subversion/trunk/subversion/libsvn_ra_svn/protocol
Particularly, compare this statement to the clown show that is the Mercurial wire protocol:
> It is possible to parse an item without knowing its type in advance.
WHAT A REASONABLE STATEMENT TO BE ABLE TO MAKE ABOUT A WIRE PROTOCOL
Although it makes substantially more sense than Mercurial, it's much heavier-weight than the Git or Mercurial protocols, since it isn't distributed.
It's also not possible to figure out if a request is a write request (or even which repository it is against) without proxying some of the protocol frames. Finally, several protocol commands embed repository URLs, and we need to reach into the protocol and translate them.
Test Plan: Ran various SVN commands over SSH (`svn log`, `svn up`, `svn commit`, etc).
Reviewers: btrahan
Reviewed By: btrahan
CC: aran
Maniphest Tasks: T2230
Differential Revision: https://secure.phabricator.com/D7556
