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# Copyright (C) 2006 Canonical Ltd
#
# 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; either version 2 of the License, or
# (at your option) any later version.
#
# 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
import BaseHTTPServer
import errno
import os
from SimpleHTTPServer import SimpleHTTPRequestHandler
import socket
import posixpath
import random
import re
import sys
import threading
import time
import urllib
import urlparse
from bzrlib.transport import Server
class WebserverNotAvailable(Exception):
pass
class BadWebserverPath(ValueError):
def __str__(self):
return 'path %s is not in %s' % self.args
class TestingHTTPRequestHandler(SimpleHTTPRequestHandler):
def log_message(self, format, *args):
self.server.test_case.log('webserver - %s - - [%s] %s "%s" "%s"',
self.address_string(),
self.log_date_time_string(),
format % args,
self.headers.get('referer', '-'),
self.headers.get('user-agent', '-'))
def handle_one_request(self):
"""Handle a single HTTP request.
You normally don't need to override this method; see the class
__doc__ string for information on how to handle specific HTTP
commands such as GET and POST.
"""
for i in xrange(1,11): # Don't try more than 10 times
try:
self.raw_requestline = self.rfile.readline()
except socket.error, e:
if e.args[0] in (errno.EAGAIN, errno.EWOULDBLOCK):
# omitted for now because some tests look at the log of
# the server and expect to see no errors. see recent
# email thread. -- mbp 20051021.
## self.log_message('EAGAIN (%d) while reading from raw_requestline' % i)
time.sleep(0.01)
continue
raise
else:
break
if not self.raw_requestline:
self.close_connection = 1
return
if not self.parse_request(): # An error code has been sent, just exit
return
mname = 'do_' + self.command
if getattr(self, mname, None) is None:
self.send_error(501, "Unsupported method (%r)" % self.command)
return
method = getattr(self, mname)
method()
_range_regexp = re.compile(r'^(?P<start>\d+)-(?P<end>\d+)$')
_tail_regexp = re.compile(r'^-(?P<tail>\d+)$')
def parse_ranges(self, ranges_header):
"""Parse the range header value and returns ranges and tail"""
tail = 0
ranges = []
assert ranges_header.startswith('bytes=')
ranges_header = ranges_header[len('bytes='):]
for range_str in ranges_header.split(','):
range_match = self._range_regexp.match(range_str)
if range_match is not None:
ranges.append((int(range_match.group('start')),
int(range_match.group('end'))))
else:
tail_match = self._tail_regexp.match(range_str)
if tail_match is not None:
tail = int(tail_match.group('tail'))
return tail, ranges
def send_range_content(self, file, start, length):
file.seek(start)
self.wfile.write(file.read(length))
def get_single_range(self, file, file_size, start, end):
self.send_response(206)
length = end - start + 1
self.send_header('Accept-Ranges', 'bytes')
self.send_header("Content-Length", "%d" % length)
self.send_header("Content-Type", 'application/octet-stream')
self.send_header("Content-Range", "bytes %d-%d/%d" % (start,
end,
file_size))
self.end_headers()
self.send_range_content(file, start, length)
def get_multiple_ranges(self, file, file_size, ranges):
self.send_response(206)
self.send_header('Accept-Ranges', 'bytes')
boundary = "%d" % random.randint(0,0x7FFFFFFF)
self.send_header("Content-Type",
"multipart/byteranges; boundary=%s" % boundary)
self.end_headers()
for (start, end) in ranges:
self.wfile.write("--%s\r\n" % boundary)
self.send_header("Content-type", 'application/octet-stream')
self.send_header("Content-Range", "bytes %d-%d/%d" % (start,
end,
file_size))
self.end_headers()
self.send_range_content(file, start, end - start + 1)
self.wfile.write("--%s\r\n" % boundary)
pass
def do_GET(self):
"""Serve a GET request.
Handles the Range header.
"""
path = self.translate_path(self.path)
ranges_header_value = self.headers.get('Range')
if ranges_header_value is None or os.path.isdir(path):
# Let the mother class handle most cases
return SimpleHTTPRequestHandler.do_GET(self)
try:
# Always read in binary mode. Opening files in text
# mode may cause newline translations, making the
# actual size of the content transmitted *less* than
# the content-length!
file = open(path, 'rb')
except IOError:
self.send_error(404, "File not found")
return None
file_size = os.fstat(file.fileno())[6]
tail, ranges = self.parse_ranges(ranges_header_value)
# Normalize tail into ranges
if tail != 0:
ranges.append((file_size - tail, file_size))
ranges_valid = True
if len(ranges) == 0:
ranges_valid = False
else:
for (start, end) in ranges:
if start >= file_size or end >= file_size:
ranges_valid = False
break
if not ranges_valid:
# RFC2616 14-16 says that invalid Range headers
# should be ignored and in that case, the whole file
# should be returned as if no Range header was
# present
file.close() # Will be reopened by the following call
return SimpleHTTPRequestHandler.do_GET(self)
if len(ranges) == 1:
(start, end) = ranges[0]
self.get_single_range(file, file_size, start, end)
else:
self.get_multiple_ranges(file, file_size, ranges)
file.close()
if sys.platform == 'win32':
# On win32 you cannot access non-ascii filenames without
# decoding them into unicode first.
# However, under Linux, you can access bytestream paths
# without any problems. If this function was always active
# it would probably break tests when LANG=C was set
def translate_path(self, path):
"""Translate a /-separated PATH to the local filename syntax.
For bzr, all url paths are considered to be utf8 paths.
On Linux, you can access these paths directly over the bytestream
request, but on win32, you must decode them, and access them
as Unicode files.
"""
# abandon query parameters
path = urlparse.urlparse(path)[2]
path = posixpath.normpath(urllib.unquote(path))
path = path.decode('utf-8')
words = path.split('/')
words = filter(None, words)
path = os.getcwdu()
for word in words:
drive, word = os.path.splitdrive(word)
head, word = os.path.split(word)
if word in (os.curdir, os.pardir): continue
path = os.path.join(path, word)
return path
class TestingHTTPServer(BaseHTTPServer.HTTPServer):
def __init__(self, server_address, RequestHandlerClass, test_case):
BaseHTTPServer.HTTPServer.__init__(self, server_address,
RequestHandlerClass)
self.test_case = test_case
class HttpServer(Server):
"""A test server for http transports.
Subclasses can provide a specific request handler.
"""
# used to form the url that connects to this server
_url_protocol = 'http'
# Subclasses can provide a specific request handler
def __init__(self, request_handler=TestingHTTPRequestHandler):
Server.__init__(self)
self.request_handler = request_handler
def _get_httpd(self):
return TestingHTTPServer(('localhost', 0),
self.request_handler,
self)
def _http_start(self):
httpd = None
httpd = self._get_httpd()
host, self.port = httpd.socket.getsockname()
self._http_base_url = '%s://localhost:%s/' % (self._url_protocol,
self.port)
self._http_starting.release()
httpd.socket.settimeout(0.1)
while self._http_running:
try:
httpd.handle_request()
except socket.timeout:
pass
def _get_remote_url(self, path):
path_parts = path.split(os.path.sep)
if os.path.isabs(path):
if path_parts[:len(self._local_path_parts)] != \
self._local_path_parts:
raise BadWebserverPath(path, self.test_dir)
remote_path = '/'.join(path_parts[len(self._local_path_parts):])
else:
remote_path = '/'.join(path_parts)
self._http_starting.acquire()
self._http_starting.release()
return self._http_base_url + remote_path
def log(self, format, *args):
"""Capture Server log output."""
self.logs.append(format % args)
def setUp(self):
"""See bzrlib.transport.Server.setUp."""
self._home_dir = os.getcwdu()
self._local_path_parts = self._home_dir.split(os.path.sep)
self._http_starting = threading.Lock()
self._http_starting.acquire()
self._http_running = True
self._http_base_url = None
self._http_thread = threading.Thread(target=self._http_start)
self._http_thread.setDaemon(True)
# Ensure we are not influenced by the environment
self._http_proxy = os.environ.get("http_proxy")
if self._http_proxy is not None:
del os.environ["http_proxy"]
self._no_proxy = os.environ.get("no_proxy")
if self._no_proxy is not None:
del os.environ["no_proxy"]
self._http_thread.start()
self.logs = []
def tearDown(self):
"""See bzrlib.transport.Server.tearDown."""
self._http_running = False
self._http_thread.join()
if self._http_proxy is None:
if os.environ.get("http_proxy") is not None:
del os.environ["http_proxy"]
else:
os.environ["http_proxy"] = self._http_proxy
if self._no_proxy is None:
if os.environ.get("no_proxy") is not None:
del os.environ["no_proxy"]
else:
os.environ["no_proxy"] = self.no_proxy
def get_url(self):
"""See bzrlib.transport.Server.get_url."""
return self._get_remote_url(self._home_dir)
def get_bogus_url(self):
"""See bzrlib.transport.Server.get_bogus_url."""
# this is chosen to try to prevent trouble with proxies, weird dns,
# etc
return 'http://127.0.0.1:1/'
class HttpServer_urllib(HttpServer):
"""Subclass of HttpServer that gives http+urllib urls.
This is for use in testing: connections to this server will always go
through urllib where possible.
"""
# urls returned by this server should require the urllib client impl
_url_protocol = 'http+urllib'
class HttpServer_PyCurl(HttpServer):
"""Subclass of HttpServer that gives http+pycurl urls.
This is for use in testing: connections to this server will always go
through pycurl where possible.
"""
# We don't care about checking the pycurl availability as
# this server will be required only when pycurl is present
# urls returned by this server should require the pycurl client impl
_url_protocol = 'http+pycurl'
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