import os import socket import logging import subprocess from webob import Request, Response, exc from rhodecode.lib import subprocessio 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 '' % ( 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): 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 def _get_fixedpath(self, path): """ Small fix for repo_path :param path: :type path: """ return path.split(self.repo_name, 1)[-1].strip('/') def inforefs(self, request, environ): """ WSGI Response producer for HTTP GET Git Smart HTTP /info/refs request. """ git_command = request.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. smart_server_advert = '# service=%s' % git_command try: out = subprocessio.SubprocessIOChunker( r'git %s --stateless-rpc --advertise-refs "%s"' % ( git_command[4:], self.content_path), starting_values=[ str(hex(len(smart_server_advert) + 4)[2:] .rjust(4, '0') + smart_server_advert + '0000') ] ) except EnvironmentError, e: log.exception(e) raise exc.HTTPExpectationFailed() resp = Response() resp.content_type = 'application/x-%s-advertisement' % str(git_command) 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_command = self._get_fixedpath(request.path_info) if git_command not in self.commands: log.debug('command %s not allowed' % git_command) return exc.HTTPMethodNotAllowed() if 'CONTENT_LENGTH' in environ: inputstream = FileWrapper(environ['wsgi.input'], request.content_length) else: inputstream = environ['wsgi.input'] try: out = subprocessio.SubprocessIOChunker( r'git %s --stateless-rpc "%s"' % (git_command[4:], self.content_path), inputstream=inputstream ) except EnvironmentError, e: log.exception(e) raise exc.HTTPExpectationFailed() if git_command in [u'git-receive-pack']: # updating refs manually after each push. # Needed for pre-1.7.0.4 git clients using regular HTTP mode. subprocess.call(u'git --git-dir "%s" ' 'update-server-info' % self.content_path, shell=True) resp = Response() resp.content_type = 'application/x-%s-result' % git_command.encode('utf8') resp.app_iter = out return resp def __call__(self, environ, start_response): request = Request(environ) _path = self._get_fixedpath(request.path_info) if _path.startswith('info/refs'): app = self.inforefs elif [a for a in self.valid_accepts if a in request.accept]: app = self.backend try: resp = app(request, environ) except exc.HTTPException, e: resp = e log.exception(e) except Exception, e: log.exception(e) resp = exc.HTTPInternalServerError() return resp(environ, start_response) class GitDirectory(object): def __init__(self, repo_root, repo_name): repo_location = os.path.join(repo_root, repo_name) if not os.path.isdir(repo_location): raise OSError(repo_location) self.content_path = repo_location self.repo_name = repo_name self.repo_location = repo_location def __call__(self, environ, start_response): content_path = self.content_path try: app = GitRepository(self.repo_name, content_path) except (AssertionError, OSError): if os.path.isdir(os.path.join(content_path, '.git')): app = GitRepository(os.path.join(content_path, '.git')) else: return exc.HTTPNotFound()(environ, start_response) return app(environ, start_response) def make_wsgi_app(repo_name, repo_root): return GitDirectory(repo_root, repo_name)