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Working pass at an HTTP server, only dumb at the moment
Change-Id: I92c883b2274252ad83bc044f87fc8608b006b6ab
Changes to 6 files · Browse files at 1f35a4766313 Showing diff from parent a93f44f5cfcf Diff from another changeset...
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@@ -1,0 +1,37 @@ + #!/usr/bin/python
+# dul-web - HTTP-based git server
+# Copyright (C) 2010 David Borowitz <dborowitz@google.com>
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; version 2
+# of the License.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+# MA 02110-1301, USA.
+
+import os
+import sys
+from dulwich.repo import Repo
+from dulwich.server import GitBackend
+from dulwich.web import HTTPGitApplication
+from wsgiref.simple_server import make_server
+
+if __name__ == "__main__":
+ if len(sys.argv) > 1:
+ gitdir = sys.argv[1]
+ else:
+ gitdir = os.getcwd()
+
+ backend = GitBackend(Repo(gitdir))
+ app = HTTPGitApplication(backend)
+ # TODO: allow serving on other ports via command-line flag
+ server = make_server('', 8000, app)
+ server.serve_forever()
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@@ -20,6 +20,7 @@ """Git object store interfaces and implementation."""
+import errno
import itertools
import os
import stat
@@ -269,15 +270,21 @@ def packs(self):
"""List with pack objects."""
if self._pack_cache is None:
- self._pack_cache = list(self._load_packs())
+ self._pack_cache = self._load_packs()
return self._pack_cache
def _load_packs(self):
if not os.path.exists(self.pack_dir):
- return
+ return []
+ pack_files = []
for name in os.listdir(self.pack_dir):
+ # TODO: verify that idx exists first
if name.startswith("pack-") and name.endswith(".pack"):
- yield Pack(os.path.join(self.pack_dir, name[:-len(".pack")]))
+ filename = os.path.join(self.pack_dir, name)
+ pack_files.append((os.stat(filename).st_mtime, filename))
+ pack_files.sort(reverse=True)
+ suffix_len = len(".pack")
+ return [Pack(f[:-suffix_len]) for _, f in pack_files]
def _add_known_pack(self, path):
"""Add a newly appeared pack to the cache by path.
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@@ -120,10 +120,13 @@ class UploadPackHandler(Handler):
"""Protocol handler for uploading a pack to the server."""
- def __init__(self, backend, read, write):
+ def __init__(self, backend, read, write,
+ stateless_rpc=False, advertise_refs=False):
Handler.__init__(self, backend, read, write)
self._client_capabilities = None
self._graph_walker = None
+ self._stateless_rpc = stateless_rpc
+ self._advertise_refs = advertise_refs
def default_capabilities(self):
return ("multi_ack", "side-band-64k", "thin-pack", "ofs-delta")
@@ -402,6 +405,12 @@class ReceivePackHandler(Handler):
"""Protocol handler for downloading a pack to the client."""
+ def __init__(self, backend, read, write,
+ stateless_rpc=False, advertise_refs=False):
+ Handler.__init__(self, backend, read, write)
+ self._stateless_rpc = stateless_rpc
+ self._advertise_refs = advertise_refs
+
def default_capabilities(self):
return ("report-status", "delete-refs")
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@@ -1,0 +1,275 @@ + # web.py -- WSGI smart-http server
+# Copryight (C) 2010 Google, Inc.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; version 2
+# or (at your option) any later version of the License.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+# MA 02110-1301, USA.
+
+"""HTTP server for dulwich that implements the git smart HTTP protocol."""
+
+from cStringIO import StringIO
+import cgi
+import os
+import re
+import time
+
+from dulwich.objects import (
+ Tag,
+ )
+from dulwich.repo import (
+ Repo,
+ )
+from dulwich.server import (
+ GitBackend,
+ ReceivePackHandler,
+ UploadPackHandler,
+ )
+
+HTTP_OK = '200 OK'
+HTTP_NOT_FOUND = '404 Not Found'
+HTTP_FORBIDDEN = '403 Forbidden'
+
+
+def date_time_string(self, timestamp=None):
+ # Based on BaseHTTPServer.py in python2.5
+ weekdays = ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
+ months = [None,
+ 'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun',
+ 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
+ if timestamp is None:
+ timestamp = time.time()
+ year, month, day, hh, mm, ss, wd, y, z = time.gmtime(timestamp)
+ return '%s, %02d %3s %4d %02d:%02d:%02d GMD' % (
+ weekdays[wd], day, months[month], year, hh, mm, ss)
+
+
+def send_file(req, f, content_type):
+ """Send a file-like object to the request output.
+
+ :param req: The HTTPGitRequest object to send output to.
+ :param f: An open file-like object to send; will be closed.
+ :param content_type: The MIME type for the file.
+ :yield: The contents of the file.
+ """
+ if f is None:
+ yield req.not_found('File not found')
+ return
+ try:
+ try:
+ req.respond(HTTP_OK, content_type)
+ while True:
+ data = f.read(10240)
+ if not data:
+ break
+ yield data
+ except IOError:
+ yield req.not_found('Error reading file')
+ finally:
+ f.close()
+
+
+def get_text_file(req, backend, mat):
+ req.nocache()
+ return send_file(req, backend.repo.get_named_file(mat.group()),
+ 'text/plain')
+
+
+def get_loose_object(req, backend, mat):
+ sha = mat.group(1) + mat.group(2)
+ object_store = backend.object_store
+ if not object_store.contains_loose(sha):
+ yield req.not_found('Object not found')
+ return
+ try:
+ data = object_store[sha].as_legacy_object()
+ except IOError:
+ yield req.not_found('Error reading object')
+ req.cache_forever()
+ req.respond(HTTP_OK, 'application/x-git-loose-object')
+ yield data
+
+
+def get_pack_file(req, backend, mat):
+ req.cache_forever()
+ return send_file(req, backend.repo.get_named_file(mat.group()),
+ 'application/x-git-packed-objects', False)
+
+
+def get_idx_file(req, backend, mat):
+ req.cache_forever()
+ return send_file(req, backend.repo.get_named_file(mat.group()),
+ 'application/x-git-packed-objects-toc', False)
+
+
+services = {'git-upload-pack': UploadPackHandler,
+ 'git-receive-pack': ReceivePackHandler}
+def get_info_refs(req, backend, mat):
+ params = cgi.parse_qs(req.environ['QUERY_STRING'])
+ service = params.get('service', [None])[0]
+ if service:
+ handler_cls = services.get(service, None)
+ if handler_cls is None:
+ yield req.forbidden('Unsupported service %s' % service)
+ req.nocache()
+ req.respond(HTTP_OK, 'application/x-%s-advertisement' % service)
+ output = StringIO()
+ dummy_input = StringIO() # GET request, handler doesn't need to read
+ handler = handler_cls(backend, dummy_input.read, output.write,
+ stateless_rpc=True, advertise_refs=True)
+ handler.proto.write_pkt_line('# service=%s\n' % service)
+ handler.proto.write_pkt_line(None)
+ handler.handle()
+ yield output.getvalue()
+ else:
+ # non-smart fallback
+ # TODO: select_getanyfile() (see http-backend.c)
+ req.nocache()
+ req.respond(HTTP_OK, 'text/plain')
+ refs = backend.get_refs()
+ for name in sorted(refs.iterkeys()):
+ # get_refs() includes HEAD as a special case, but we don't want to
+ # advertise it
+ if name == 'HEAD':
+ continue
+ sha = refs[name]
+ o = backend.repo[sha]
+ if not o:
+ continue
+ yield '%s\t%s\n' % (sha, name)
+ if isinstance(o, Tag):
+ while isinstance(o, Tag):
+ _, sha = o.object
+ o = backend.repo[sha]
+ if not o:
+ continue
+ yield '%s\t%s^{}\n' % (o.sha(), name)
+
+
+def get_info_packs(req, backend, mat):
+ req.nocache()
+ req.respond(HTTP_OK, 'text/plain')
+ for pack in backend.object_store.packs:
+ yield 'P pack-%s.pack\n' % pack.name()
+
+
+def handle_service_request(req, backend, mat):
+ service = mat.group().lstrip('/')
+ handler_cls = services.get(service, None)
+ if handler_cls is None:
+ yield req.forbidden('Unsupported service %s' % service)
+ req.nocache()
+ req.respond(HTTP_OK, 'application/x-%s-response' % service)
+
+ output = StringIO()
+ input = req.environ['wsgi.input']
+ handler = handler_cls(backend, input.read, output.write, stateless_rpc=True)
+ handler.handle()
+ yield output.getvalue()
+
+
+class HTTPGitRequest(object):
+ """Class encapsulating the state of a single git HTTP request.
+
+ :ivar environ: the WSGI environment for the request.
+ """
+
+ def __init__(self, environ, start_response):
+ self.environ = environ
+ self._start_response = start_response
+ self._cache_headers = []
+ self._headers = []
+
+ def add_header(self, name, value):
+ """Add a header to the response."""
+ self._headers.append((name, value))
+
+ def respond(self, status=HTTP_OK, content_type=None, headers=None):
+ """Begin a response with the given status and other headers."""
+ if headers:
+ self._headers.extend(headers)
+ if content_type:
+ self._headers.append(('Content-Type', content_type))
+ self._headers.extend(self._cache_headers)
+
+ self._start_response(status, self._headers)
+
+ def not_found(self, message):
+ """Begin a HTTP 404 response and return the text of a message."""
+ self._cache_headers = []
+ self.respond(HTTP_NOT_FOUND, 'text/plain')
+ return message
+
+ def forbidden(self, message):
+ """Begin a HTTP 403 response and return the text of a message."""
+ self._cache_headers = []
+ self.respond(HTTP_FORBIDDEN, 'text/plain')
+ return message
+
+ def nocache(self):
+ """Set the response to never be cached by the client."""
+ self._cache_headers = [
+ ('Expires', 'Fri, 01 Jan 1980 00:00:00 GMT'),
+ ('Pragma', 'no-cache'),
+ ('Cache-Control', 'no-cache, max-age=0, must-revalidate'),
+ ]
+
+ def cache_forever(self):
+ """Set the response to be cached forever by the client."""
+ now = time.time()
+ self._cache_headers = [
+ ('Date', date_time_string(now)),
+ ('Expires', date_time_string(now + 31536000)),
+ ('Cache-Control', 'public, max-age=31536000'),
+ ]
+
+
+class HTTPGitApplication(object):
+ """Class encapsulating the state of a git WSGI application.
+
+ :ivar backend: the Backend object backing this application
+ """
+
+ services = {
+ ('GET', re.compile('/HEAD$')): get_text_file,
+ ('GET', re.compile('/info/refs$')): get_info_refs,
+ ('GET', re.compile('/objects/info/alternates$')): get_text_file,
+ ('GET', re.compile('/objects/info/http-alternates$')): get_text_file,
+ ('GET', re.compile('/objects/info/packs$')): get_info_packs,
+ ('GET', re.compile('/objects/([0-9a-f]{2})/([0-9a-f]{38})$')): get_loose_object,
+ ('GET', re.compile('/objects/pack/pack-([0-9a-f]{40})\\.pack$')): get_pack_file,
+ ('GET', re.compile('/objects/pack/pack-([0-9a-f]{40})\\.idx$')): get_idx_file,
+
+ ('POST', re.compile('/git-upload-pack$')): handle_service_request,
+ ('POST', re.compile('/git-receive-pack$')): handle_service_request,
+ }
+
+ def __init__(self, backend):
+ self.backend = backend
+
+ def __call__(self, environ, start_response):
+ path = environ['PATH_INFO']
+ method = environ['REQUEST_METHOD']
+ req = HTTPGitRequest(environ, start_response)
+ # environ['QUERY_STRING'] has qs args
+ handler = None
+ for smethod, spath in self.services.iterkeys():
+ if smethod != method:
+ continue
+ mat = spath.search(path)
+ if mat:
+ handler = self.services[smethod, spath]
+ break
+ if handler is None:
+ return req.not_found('Sorry, that method is not supported')
+ return handler(req, self.backend, mat)
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@@ -51,7 +51,7 @@ in one of the Monty Python sketches.
""",
packages=['dulwich', 'dulwich.tests'],
- scripts=['bin/dulwich', 'bin/dul-daemon'],
+ scripts=['bin/dulwich', 'bin/dul-daemon', 'bin/dul-web'],
features = {'speedups': speedups},
ext_modules = mandatory_ext_modules,
)
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