upstream/mercurial-mirror Files · mercurial/hgweb/wsgicgi.py

revlog: linearize created changegroups in generaldelta revlogs...

revlog: linearize created changegroups in generaldelta revlogs This greatly improves the speed of the bundling process, and often reduces the bundle size considerably. (Although if the repository is already ordered, this has little effect on both time and bundle size.) For non-generaldelta clients, the reduced bundle size translates to a reduced repository size, similar to shrinking the revlogs (which uses the exact same algorithm). For generaldelta clients the difference is minor. When the new bundle format comes, reordering will not be necessary since we can then store the deltaparent relationsships directly. The eventual default behavior for clients and servers is presented in the table below, where "new" implies support for GD as well as the new bundle format: old client new client old server old bundle, no reorder old bundle, no reorder new server, non-GD old bundle, no reorder[1] old bundle, no reorder[2] new server, GD old bundle, reorder[3] new bundle, no reorder[4] [1] reordering is expensive on the server in this case, skip it [2] client can choose to do its own redelta here [3] reordering is needed because otherwise the pull does a lot of extra work on the server [4] reordering isn't needed because client can get deltabase in bundle format Currently, the default is to reorder on GD-servers, and not otherwise. A new setting, bundle.reorder, has been added to override the default reordering behavior. It can be set to either 'auto' (the default), or any true or false value as a standard boolean setting, to either force the reordering on or off regardless of generaldelta. Some timing data from a relatively branch test repository follows. All bundling is done with --all --type none options. Non-generaldelta, non-shrunk repo: ----------------------------------- Size: 276M Without reorder (default): Bundle time: 14.4 seconds Bundle size: 939M With reorder: Bundle time: 1 minute, 29.3 seconds Bundle size: 381M Generaldelta, non-shrunk repo: ----------------------------------- Size: 87M Without reorder: Bundle time: 2 minutes, 1.4 seconds Bundle size: 939M With reorder (default): Bundle time: 25.5 seconds Bundle size: 381M

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      # hgweb/wsgicgi.py - CGI->WSGI translator

      #

      # Copyright 2006 Eric Hopper <hopper@omnifarious.org>

      #

      # This software may be used and distributed according to the terms of the

      # GNU General Public License version 2 or any later version.

      #

      # This was originally copied from the public domain code at

      # http://www.python.org/dev/peps/pep-0333/#the-server-gateway-side

      import os, sys

      from mercurial import util

      from mercurial.hgweb import common

      def launch(application):

          util.setbinary(sys.stdin)

          util.setbinary(sys.stdout)

          environ = dict(os.environ.iteritems())

          environ.setdefault('PATH_INFO', '')

          if environ.get('SERVER_SOFTWARE', '').startswith('Microsoft-IIS'):

              # IIS includes script_name in path_info

              scriptname = environ['SCRIPT_NAME']

              if environ['PATH_INFO'].startswith(scriptname):

                  environ['PATH_INFO'] = environ['PATH_INFO'][len(scriptname):]

          stdin = sys.stdin

          if environ.get('HTTP_EXPECT', '').lower() == '100-continue':

              stdin = common.continuereader(stdin, sys.stdout.write)

          environ['wsgi.input'] = stdin

          environ['wsgi.errors'] = sys.stderr

          environ['wsgi.version'] = (1, 0)

          environ['wsgi.multithread'] = False

          environ['wsgi.multiprocess'] = True

          environ['wsgi.run_once'] = True

          if environ.get('HTTPS', 'off').lower() in ('on', '1', 'yes'):

              environ['wsgi.url_scheme'] = 'https'

          else:

              environ['wsgi.url_scheme'] = 'http'

          headers_set = []

          headers_sent = []

          out = sys.stdout

          def write(data):

              if not headers_set:

                  raise AssertionError("write() before start_response()")

              elif not headers_sent:

                  # Before the first output, send the stored headers

                  status, response_headers = headers_sent[:] = headers_set

                  out.write('Status: %s\r\n' % status)

                  for header in response_headers:

                      out.write('%s: %s\r\n' % header)

                  out.write('\r\n')

              out.write(data)

              out.flush()

          def start_response(status, response_headers, exc_info=None):

              if exc_info:

                  try:

                      if headers_sent:

                          # Re-raise original exception if headers sent

                          raise exc_info[0](exc_info[1], exc_info[2])

                  finally:

                      exc_info = None     # avoid dangling circular ref

              elif headers_set:

                  raise AssertionError("Headers already set!")

              headers_set[:] = [status, response_headers]

              return write

          content = application(environ, start_response)

          try:

              for chunk in content:

                  write(chunk)

          finally:

              if hasattr(content, 'close'):

                  content.close()

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				# hgweb/wsgicgi.py - CGI->WSGI translator
				#
				# Copyright 2006 Eric Hopper <hopper@omnifarious.org>
				#
				# This software may be used and distributed according to the terms of the
				# GNU General Public License version 2 or any later version.
				#
				# This was originally copied from the public domain code at
				# http://www.python.org/dev/peps/pep-0333/#the-server-gateway-side

				import os, sys
				from mercurial import util
				from mercurial.hgweb import common

				def launch(application):
				util.setbinary(sys.stdin)
				util.setbinary(sys.stdout)

				environ = dict(os.environ.iteritems())
				environ.setdefault('PATH_INFO', '')
				if environ.get('SERVER_SOFTWARE', '').startswith('Microsoft-IIS'):
				# IIS includes script_name in path_info
				scriptname = environ['SCRIPT_NAME']
				if environ['PATH_INFO'].startswith(scriptname):
				environ['PATH_INFO'] = environ['PATH_INFO'][len(scriptname):]

				stdin = sys.stdin
				if environ.get('HTTP_EXPECT', '').lower() == '100-continue':
				stdin = common.continuereader(stdin, sys.stdout.write)

				environ['wsgi.input'] = stdin
				environ['wsgi.errors'] = sys.stderr
				environ['wsgi.version'] = (1, 0)
				environ['wsgi.multithread'] = False
				environ['wsgi.multiprocess'] = True
				environ['wsgi.run_once'] = True

				if environ.get('HTTPS', 'off').lower() in ('on', '1', 'yes'):
				environ['wsgi.url_scheme'] = 'https'
				else:
				environ['wsgi.url_scheme'] = 'http'

				headers_set = []
				headers_sent = []
				out = sys.stdout

				def write(data):
				if not headers_set:
				raise AssertionError("write() before start_response()")

				elif not headers_sent:
				# Before the first output, send the stored headers
				status, response_headers = headers_sent[:] = headers_set
				out.write('Status: %s\r\n' % status)
				for header in response_headers:
				out.write('%s: %s\r\n' % header)
				out.write('\r\n')

				out.write(data)
				out.flush()

				def start_response(status, response_headers, exc_info=None):
				if exc_info:
				try:
				if headers_sent:
				# Re-raise original exception if headers sent
				raise exc_info[0](exc_info[1], exc_info[2])
				finally:
				exc_info = None # avoid dangling circular ref
				elif headers_set:
				raise AssertionError("Headers already set!")

				headers_set[:] = [status, response_headers]
				return write

				content = application(environ, start_response)
				try:
				for chunk in content:
				write(chunk)
				finally:
				if hasattr(content, 'close'):
				content.close()