kallithea Changeset - c9f97be1927e

Changeset - c9f97be1927e

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Andrew Shadura - 9 years ago 2016-07-12 21:47:14
andrew@shadura.me

pygrack: refactor _get_fixedpath

This function strips the repository name and any slashes from the
URL path, leaving the protocol command, like info/refs or
git-{receive,upload}-pack.

Using .split() and .strip() for this purpose isn't entirely reliable
and is entirely unreadable, so it's better to write it out, even if
it's a bit verbose.

Also, error out in the unlikely case the path doesn't start with
a slash and the repository name; that shouldn't happen normally.

1 file changed with 2 insertions and 1 deletions:

kallithea/lib/middleware/pygrack.py

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kallithea/lib/middleware/pygrack.py

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@@ @@ -41,97 +41,98 @@ log = logging.getLogger(__name__) @@
 class FileWrapper(object):
     def __init__(self, fd, content_length):
         self.fd = fd
         self.content_length = content_length
         self.remain = content_length
     def read(self, size):
         if size <= self.remain:
             try:
                 data = self.fd.read(size)
             except socket.error:
                 raise IOError(self)
             self.remain -= size
         elif self.remain:
             data = self.fd.read(self.remain)
             self.remain = 0
         else:
             data = None
         return data
     def __repr__(self):
         return '<FileWrapper %s len: %s, read: %s>' % (
             self.fd, self.content_length, self.content_length - self.remain
+        )
 class GitRepository(object):
     git_folder_signature = set(['config', 'head', 'info', 'objects', 'refs'])
     commands = ['git-upload-pack', 'git-receive-pack']
     def __init__(self, repo_name, content_path, extras):
         files = set([f.lower() for f in os.listdir(content_path)])
         if  not (self.git_folder_signature.intersection(files)
                 == self.git_folder_signature):
             raise OSError('%s missing git signature' % content_path)
         self.content_path = content_path
         self.valid_accepts = ['application/x-%s-result' %
                               c for c in self.commands]
         self.repo_name = repo_name
         self.extras = extras
     def _get_fixedpath(self, path):
         """
         Small fix for repo_path
         :param path:
         """
         return path.split(self.repo_name, 1)[-1].strip('/')
         assert path.startswith('/' + self.repo_name + '/')
         return path[len(self.repo_name) + 2:].strip('/')
     def inforefs(self, request, environ):
         """
         WSGI Response producer for HTTP GET Git Smart
         HTTP /info/refs request.
         """
         git_command = request.GET.get('service')
         if git_command not in self.commands:
             log.debug('command %s not allowed', git_command)
             return exc.HTTPMethodNotAllowed()
         # note to self:
         # please, resist the urge to add '\n' to git capture and increment
         # line count by 1.
         # The code in Git client not only does NOT need '\n', but actually
         # blows up if you sprinkle "flush" (0000) as "0001\n".
         # It reads binary, per number of bytes specified.
         # if you do add '\n' as part of data, count it.
         server_advert = '# service=%s' % git_command
         packet_len = str(hex(len(server_advert) + 4)[2:].rjust(4, '0')).lower()
         _git_path = kallithea.CONFIG.get('git_path', 'git')
         cmd = [_git_path, git_command[4:],
                '--stateless-rpc', '--advertise-refs', self.content_path]
         log.debug('handling cmd %s', cmd)
         try:
             out = subprocessio.SubprocessIOChunker(cmd,
                 starting_values=[packet_len + server_advert + '0000']
+            )
         except EnvironmentError as e:
             log.error(traceback.format_exc())
             raise exc.HTTPExpectationFailed()
         resp = Response()
         resp.content_type = 'application/x-%s-advertisement' % str(git_command)
         resp.charset = None
         resp.app_iter = out
         return resp
     def backend(self, request, environ):
         """
         WSGI Response producer for HTTP POST Git Smart HTTP requests.
         Reads commands and data from HTTP POST's body.
         returns an iterator obj with contents of git command's
         response to stdout
         """
         _git_path = kallithea.CONFIG.get('git_path', 'git')
         git_command = self._get_fixedpath(request.path_info)
         if git_command not in self.commands:

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