def __init__(self):
self.headers = {}
self.interface = None
self.git = Git(config.git_path)
class GHTTPServer(object):
VALID_SERVICE_TYPES = ['upload-pack', 'receive-pack']
SERVICES = [
["POST",
'service_rpc',
re.compile("(.*?)/git-upload-pack$"),
'upload-pack'],
["POST",
'service_rpc',
re.compile("(.*?)/git-receive-pack$"),
'receive-pack'],
["GET",
'get_info_refs',
re.compile("(.*?)/info/refs$")],
["GET",
'get_text_file',
re.compile("(.*?)/HEAD$")],
["GET",
'get_text_file',
re.compile("(.*?)/objects/info/alternates$")],
["GET",
'get_text_file',
re.compile("(.*?)/objects/info/http-alternates$")],
["GET",
'get_info_packs',
re.compile("(.*?)/objects/info/packs$")],
["GET",
'get_text_file',
re.compile("(.*?)/objects/info/[^/]*$")],
["GET",
'get_loose_object',
re.compile("(.*?)/objects/[0-9a-f]{2}/[0-9a-f]{38}$")],
["GET",
'get_pack_file',
re.compile("(.*?)/objects/pack/pack-[0-9a-f]{40}\\.pack$")],
["GET",
'get_idx_file',
re.compile("(.*?)/objects/pack/pack-[0-9a-f]{40}\\.idx$")],
]
def __init__(self):
self.headers = {}
self.interface = None
self.git = Git(config.git_path)
def __call__(self, environ, start_response):
self.headers = {}
self.env = environ
self.interface = config.ghttp_interface()
body = self.call()
start_response(self.status, self.headers.items())
return body
def check_auth(self):
authorization = self.env.get('HTTP_AUTHORIZATION')
if not authorization:
return True
try:
username, password = decode(authorization)
except DecodeError:
return None
if not self.interface.check_user(username):
return None
if not self.interface.check_password(password):
return None
return True
def check_repo(self, path):
if self.interface.check_repo(path):
return True
def check_command(self, cmd, rpc):
if cmd == 'service_rpc':
command = rpc
else:
command = cmd
if self.interface.check_command(command):
return True
def call(self):
if not self.check_auth():
return self.render_no_authorization()
match = self.match_routing(self.env["PATH_INFO"].lstrip('/'),
self.env["REQUEST_METHOD"])
if not match:
return self.render_not_found()
cmd, path, reqfile, rpc = match
if not self.check_repo(path):
return self.render_no_access()
if not self.check_command(cmd, rpc):
return self.render_no_access()
self.git_env = self.interface.get_env()
self.rpc = rpc
self.reqfile = reqfile
if cmd == "not_allowed":
return self.render_method_not_allowed()
self.dir = self.get_git_dir(path)
if not self.dir:
return self.render_not_found()
func = getattr(self, cmd)
return func()
def service_rpc(self):
if not self.has_access(self.rpc, True):
return self.render_no_access()
input = self.read_body
git_cmd = "upload_pack" \
if self.rpc == "upload-pack" else "receive_pack"
self.status = "200"
self.headers["Content-Type"] = "application/x-git-%s-result" % self.rpc
return getattr(self.git, git_cmd)(self.dir,
{"msg": input},
callback,
env=self.git_env)
def get_info_refs(self):
service_name = self.get_service_type()
if self.has_access(service_name):
git_cmd = "upload_pack" \
if service_name == "upload-pack" else "receive_pack"
refs = getattr(self.git, git_cmd)(self.dir,
{"advertise_refs": True},
env=self.git_env)
self.status = "200"
self.headers["Content-Type"] = \
"application/x-git-%s-advertisement" % service_name
self.hdr_nocache()
def read_file():
yield self.pkt_write("# service=git-%s\n" % service_name)
yield self.pkt_flush
yield refs
return read_file()
else:
return self.dumb_info_refs()
def get_text_file(self):
return self.send_file(self.reqfile, "text/plain")
def dumb_info_refs(self):
self.update_server_info()
return self.send_file(self.reqfile,
"text/plain; charset=utf-8")
def get_info_packs(self):
# objects/info/packs
return self.send_file(self.reqfile,
"text/plain; charset=utf-8")
def get_loose_object(self):
return self.send_file(self.reqfile,
"application/x-git-loose-object",
cached=True)
def get_pack_file(self):
return self.send_file(self.reqfile,
"application/x-git-packed-objects",
cached=True)
def get_idx_file(self):
return self.send_file(self.reqfile,
"application/x-git-packed-objects-toc",
cached=True)
def get_service_type(self):
def get_param():
for query in self.env["QUERY_STRING"].split('&'):
param = tuple(query.split('='))
if param and param[0] == "service":
return param[1]
service_type = get_param()
if not service_type:
return False
if service_type[0:4] != 'git-':
return False
return service_type.replace('git-', '')
@classmethod
def match_routing(cls, path_info, request_method):
for service in cls.SERVICES:
rpc = None
if len(service) == 4:
method, handler, re_match, rpc = service
elif len(service) == 3:
method, handler, re_match = service
m = re_match.match(path_info)
if m:
if method != request_method:
return ["not_allowed", None, None, None]
cmd = handler
path = m.group(1)
file = path_info.replace(path + '/', '')
return [cmd, path, file, rpc]
return None
def send_file(self, reqfile, content_type, cached=False):
reqfile = join(self.dir, reqfile)
if not self.is_subpath(reqfile, self.dir):
return self.render_no_access()
if not exists(reqfile) or not access(reqfile, os.R_OK):
return self.render_not_found()
self.status = "200"
self.headers["Content-Type"] = content_type
self.headers["Last-Modified"] = format_date_time(getmtime(reqfile))
if cached:
self.hdr_cache_forenver()
else:
self.hdr_nocache()
size = getsize(reqfile)
if size:
self.headers["Content-Length"] = size
def read_file():
with open(reqfile, "rb") as f:
while True:
part = f.read(8192)
if not part:
break
yield part
return read_file()
else:
with open(reqfile, "rb") as f:
part = f.read()
self.headers["Content-Length"] = str(len(part))
return [part]
def update_server_info(self):
self.git.update_server_info(self.dir)
@property
def read_body(self):
input = self.env["wsgi.input"]
return input.read()
# ------------------------------
# packet-line handling functions
# ------------------------------
@property
def pkt_flush(self):
return '0000'
def pkt_write(self, str):
# TODO: use zfill
PKT_FORMAT = "{0:{fill}{align}{width}{base}}{1}"
return PKT_FORMAT.format(len(str) + 4,
str,
base='x',
width=4,
fill='0',
align='>')
# ------------------------
# header writing functions
# ------------------------
def hdr_nocache(self):
self.headers["Expires"] = "Fri, 01 Jan 1980 00:00:00 GMT"
self.headers["Pragma"] = "no-cache"
self.headers["Cache-Control"] = "no-cache, max-age=0, must-revalidate"
def hdr_cache_forenver(self):
now = int(time.time())
self.headers["Date"] = str(now)
self.headers["Expires"] = str(now + 31536000)
self.headers["Cache-Control"] = "public, max-age=31536000"
# --------------------------------------
# HTTP error response handling functions
# --------------------------------------
def render_method_not_allowed(self):
env = []
if env["SERVER_PROTOCOL"] == "HTTP/1.1":
self.status = "405"
self.headers["Content-Type"] = "text/plain"
return ["Method Not Allowed"]
else:
self.status = "400"
self.headers["Content-Type"] = "text/plain"
return ["Bad Request"]
def render_not_found(self):
self.status = "404"
self.headers["Content-Type"] = "text/plain"
return ["Not Found"]
def render_no_access(self):
self.status = "403"
self.headers["Content-Type"] = "text/plain"
return ["Forbidden"]
def render_no_authorization(self):
self.status = "401"
self.headers["Content-Type"] = "text/plain"
self.headers["WWW-Authenticate"] = "Basic realm=Protected"
return ["Unauthorized"]
def has_access(self, rpc, check_content_type=False):
if check_content_type:
if self.env["CONTENT_TYPE"] \
!= "application/x-git-%s-request" % rpc:
return False
if rpc not in self.VALID_SERVICE_TYPES:
return False
return self.get_config_setting(rpc)
def get_config_setting(self, service_name):
service_name = service_name.replace('-', '')
setting = self.git.get_config_setting(self.dir,
"http.%s" % service_name)
if service_name == 'uploadpack':
return setting != 'false'
else:
return setting == 'true'
def get_git_dir(self, path):
root = self.get_project_root()
path = join(root, path)
if not self.is_subpath(path, root):
return False
if exists(path): # TODO: check is a valid git directory
return path
return False
def get_project_root(self):
root = config.repos_path or os.getcwd()
return root
def is_subpath(self, path, checkpath):
path = unquote(path)
checkpath = unquote(checkpath)
# Remove trailing slashes from filepath
checkpath = checkpath.replace("\/+$", '')
if re.match("^%s(\/|$)" % checkpath, path):
return True
