# An example WSGI script for IIS/isapi-wsgi to export multiple hgweb repos

# Copyright 2010-2016 Sune Foldager <cyano@me.com>

#

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

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

#

# Requirements:

# - Python 2.7, preferably 64 bit

# - Mercurial installed from source (python setup.py install) or download the

#   python module installer from https://www.mercurial-scm.org/wiki/Download

# - IIS 7 or newer

#

#

# Installation and use:

#

# - Download or clone the isapi-wsgi source and run python setup.py install.

#   https://github.com/hexdump42/isapi-wsgi

#

# - Create a directory to hold the shim dll, config files etc. This can reside

#   inside the standard IIS directory, C:\inetpub, or anywhere else. Copy this

#   script there.

#

# - Run this script (i.e. python hgwebdir_wsgi.py) to get a shim dll. The

#   shim is identical for all scripts, so you can just copy and rename one

#   from an earlier run, if you wish. The shim needs to reside in the same

#   directory as this script.

#

# - Start IIS manager and create a new app pool:

#   .NET CLR Version: No Managed Code

#   Advanced Settings: Enable 32 Bit Applications, if using 32 bit Python.

#   You can adjust the identity and maximum worker processes if you wish. This

#   setup works fine with multiple worker processes.

#

# - Create an IIS application where your hgwebdir is to be served from.

#   Assign it the app pool you just created and point its physical path to the

#   directory you created.

#

# - In the application, remove all handler mappings and setup a wildcard script

#   handler mapping of type IsapiModule with the shim dll as its executable.

#   This file MUST reside in the same directory as the shim. The easiest way

#   to do all this is to close IIS manager, place a web.config file in your

#   directory and start IIS manager again. The file should contain:

#

#   <?xml version="1.0" encoding="UTF-8"?>

#   <configuration>

#       <system.webServer>

#           <handlers accessPolicy="Read, Script">

#               <clear />

#               <add name="hgwebdir" path="*" verb="*" modules="IsapiModule"

#                    scriptProcessor="C:\your\directory\_hgwebdir_wsgi.dll"

#                    resourceType="Unspecified" requireAccess="None"

#                    preCondition="bitness64" />

#           </handlers>

#       </system.webServer>

#   </configuration>

#

#   Where "bitness64" should be replaced with "bitness32" for 32 bit Python.

#

# - Edit ISAPI And CGI Restrictions on the web server (global setting). Add a

#   restriction pointing to your shim dll and allow it to run.

#

# - Create a configuration file in your directory and adjust the configuration

#   variables below to match your needs. Example configuration:

#

#   [web]

#   style = gitweb

#   push_ssl = false

#   allow_push = *

#   encoding = utf8

#

#   [server]

#   validate = true

#

#   [paths]

#   repo1 = c:\your\directory\repo1

#   repo2 = c:\your\directory\repo2

#

# - Restart the web server and see if things are running.

#

from __future__ import absolute_import

# Configuration file location

hgweb_config = r'c:\your\directory\wsgi.config'

# Global settings for IIS path translation

path_strip = 0  # Strip this many path elements off (when using url rewrite)

path_prefix = 1  # This many path elements are prefixes (depends on the

# virtual path of the IIS application).

import sys

# Adjust python path if this is not a system-wide install

# sys.path.insert(0, r'C:\your\custom\hg\build\lib.win32-2.7')

# Enable tracing. Run 'python -m win32traceutil' to debug

if getattr(sys, 'isapidllhandle', None) is not None:

    import win32traceutil

    win32traceutil.SetupForPrint  # silence unused import warning

import isapi_wsgi

from mercurial.hgweb.hgwebdir_mod import hgwebdir

# Example tweak: Replace isapi_wsgi's handler to provide better error message

# Other stuff could also be done here, like logging errors etc.

class WsgiHandler(isapi_wsgi.IsapiWsgiHandler):

    error_status = '500 Internal Server Error'  # less silly error message

isapi_wsgi.IsapiWsgiHandler = WsgiHandler

# Only create the hgwebdir instance once

application = hgwebdir(hgweb_config)

def handler(environ, start_response):

    # Translate IIS's weird URLs

    url = environ['SCRIPT_NAME'] + environ['PATH_INFO']

    paths = url[1:].split('/')[path_strip:]

    script_name = '/' + '/'.join(paths[:path_prefix])

    path_info = '/'.join(paths[path_prefix:])

    if path_info:

        path_info = '/' + path_info

    environ['SCRIPT_NAME'] = script_name

    environ['PATH_INFO'] = path_info

    return application(environ, start_response)

def __ExtensionFactory__():

    return isapi_wsgi.ISAPISimpleHandler(handler)

if __name__ == '__main__':

    from isapi.install import ISAPIParameters, HandleCommandLine

    params = ISAPIParameters()

    HandleCommandLine(params)