"""Wrapper for mod_wsgi, for use as a CherryPy HTTP server.
To autostart modwsgi, the "apache" executable or script must be
on your system path, or you must override the global APACHE_PATH.
On some platforms, "apache" may be called "apachectl" or "apache2ctl"--
create a symlink to them if needed.
KNOWN BUGS
==========
##1. Apache processes Range headers automatically; CherryPy's truncated
## output is then truncated again by Apache. See test_core.testRanges.
## This was worked around in http://www.cherrypy.org/changeset/1319.
2. Apache does not allow custom HTTP methods like CONNECT as per the spec.
See test_core.testHTTPMethods.
3. Max request header and body settings do not work with Apache.
##4. Apache replaces status "reason phrases" automatically. For example,
## CherryPy may set "304 Not modified" but Apache will write out
## "304 Not Modified" (capital "M").
##5. Apache does not allow custom error codes as per the spec.
##6. Apache (or perhaps modpython, or modpython_gateway) unquotes %xx in the
## Request-URI too early.
7. mod_wsgi will not read request bodies which use the "chunked"
transfer-coding (it passes REQUEST_CHUNKED_ERROR to ap_setup_client_block
instead of REQUEST_CHUNKED_DECHUNK, see Apache2's http_protocol.c and
mod_python's requestobject.c).
8. When responding with 204 No Content, mod_wsgi adds a Content-Length
header for you.
9. When an error is raised, mod_wsgi has no facility for printing a
traceback as the response content (it's sent to the Apache log instead).
10. Startup and shutdown of Apache when running mod_wsgi seems slow.
"""
import os
import re
import sys
import time
import portend
from cherrypy.test import helper, webtest
curdir = os.path.abspath(os.path.dirname(__file__))
[docs]def read_process(cmd, args=''):
pipein, pipeout = os.popen4('%s %s' % (cmd, args))
try:
firstline = pipeout.readline()
if (re.search(r'(not recognized|No such file|not found)', firstline,
re.IGNORECASE)):
raise IOError('%s must be on your system path.' % cmd)
output = firstline + pipeout.read()
finally:
pipeout.close()
return output
if sys.platform == 'win32':
APACHE_PATH = 'httpd'
else:
APACHE_PATH = 'apache'
CONF_PATH = 'test_mw.conf'
conf_modwsgi = r"""
# Apache2 server conf file for testing CherryPy with modpython_gateway.
ServerName 127.0.0.1
DocumentRoot "/"
Listen %(port)s
AllowEncodedSlashes On
LoadModule rewrite_module modules/mod_rewrite.so
RewriteEngine on
RewriteMap escaping int:escape
LoadModule log_config_module modules/mod_log_config.so
LogFormat "%%h %%l %%u %%t \"%%r\" %%>s %%b \"%%{Referer}i\" \"%%{User-agent}i\"" combined
CustomLog "%(curdir)s/apache.access.log" combined
ErrorLog "%(curdir)s/apache.error.log"
LogLevel debug
LoadModule wsgi_module modules/mod_wsgi.so
LoadModule env_module modules/mod_env.so
WSGIScriptAlias / "%(curdir)s/modwsgi.py"
SetEnv testmod %(testmod)s
"""
[docs]class ModWSGISupervisor(helper.Supervisor):
"""Server Controller for ModWSGI and CherryPy."""
using_apache = True
using_wsgi = True
template = conf_modwsgi
def __str__(self):
return 'ModWSGI Server on %s:%s' % (self.host, self.port)
[docs] def start(self, modulename):
mpconf = CONF_PATH
if not os.path.isabs(mpconf):
mpconf = os.path.join(curdir, mpconf)
f = open(mpconf, 'wb')
try:
output = (self.template %
{'port': self.port, 'testmod': modulename,
'curdir': curdir})
f.write(output)
finally:
f.close()
result = read_process(APACHE_PATH, '-k start -f %s' % mpconf)
if result:
print(result)
# Make a request so mod_wsgi starts up our app.
# If we don't, concurrent initial requests will 404.
portend.occupied('127.0.0.1', self.port, timeout=5)
webtest.openURL('/ihopetheresnodefault', port=self.port)
time.sleep(1)
[docs] def stop(self):
"""Gracefully shutdown a server that is serving forever."""
read_process(APACHE_PATH, '-k stop')
loaded = False
[docs]def application(environ, start_response):
import cherrypy
global loaded
if not loaded:
loaded = True
modname = 'cherrypy.test.' + environ['testmod']
mod = __import__(modname, globals(), locals(), [''])
mod.setup_server()
cherrypy.config.update({
'log.error_file': os.path.join(curdir, 'test.error.log'),
'log.access_file': os.path.join(curdir, 'test.access.log'),
'environment': 'test_suite',
'engine.SIGHUP': None,
'engine.SIGTERM': None,
})
return cherrypy.tree(environ, start_response)