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#
# virt_handler.py
#
# $Id: virt_handler.py,v 1.1.1.1.2.1 2010/04/14 13:55:08 source Exp $
#
# python proxy for OpenLink python plugin
#
# This file is part of the OpenLink Software Virtuoso Open-Source (VOS)
# project.
#
# Copyright (C) 1998-2006 OpenLink Software
#
# This project 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; only version 2 of the License, dated June 1991.
#
# 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 St, Fifth Floor, Boston, MA 02110-1301 USA
#
#
import os;
import sys;
import traceback;
class VirtNullIO:
def tell(self): return 0
def read(self, n = -1): return ""
def readline(self, length = None): return ""
def readlines(self): return []
def write(self, s): pass
def writelines(self, list):
self.write("".join(list))
def isatty(self): return 0
def flush(self): pass
def close(self): pass
def seek(self, pos, mode = 0): pass
class VirtCGIStdin(VirtNullIO):
def __init__(self, init_val):
self.pos = 0
# note that self.buf sometimes contains leftovers
# that were read, but not used when readline was used
self.buf = init_val
def read(self, n = -1):
if n <= 0:
return ""
n2 = n + self.pos;
if self.buf:
s = self.buf[self.pos:n2]
n = n - len(s)
else:
s = ""
self.pos = self.pos + len(s)
return s
def readlines(self):
s = (self.buf).split('\n')
return map(lambda s: s + '\n', s)
def readline(self, n = -1):
if n == 0:
return ""
# look for \n in the buffer
i = self.buf.find('\n')
if i == -1:
i = len (self.buf) - 1
# carve out the piece, then shorten the buffer
result = self.buf[:i+1]
self.buf = self.buf[i+1:]
self.pos = self.pos + len(result)
return result
class VirtCGIStdout(VirtNullIO):
def __init__(self):
self.pos = 0
self.headers_sent = 0
self.headers = ""
self.req_text = ""
self.html_mode=0
def write(self, s):
if not s: return
if self.html_mode and not self.headers_sent:
self.headers = self.headers + s
headers_over = 0
ss = self.headers.split('\r\n\r\n', 1)
if len(ss) < 2:
ss = self.headers.split('\n\n', 1)
if len(ss) >= 2:
headers_over = 1
else:
headers_over = 1
if headers_over:
self.headers_sent = 1
else:
self.req_text = self.req_text + s
self.pos = self.pos + len(s)
def tell(self): return self.pos
def get_headers(self) : return self.headers;
def get_body(self) : return self.req_text;
def set_html_mode(self) : self.html_mode=1;
def setup_cgi(env, stdin_txt, new_stdout, new_stderr):
save_env = os.environ.copy()
if env.has_key ("__VIRT_CGI") and env["__VIRT_CGI"] == '1':
new_stdout.set_html_mode ();
si = sys.stdin
so = sys.stdout
sr = sys.stderr
os.environ.update(env)
sys.stdout = new_stdout
sys.stdin = VirtCGIStdin(stdin_txt)
sys.stderr = new_stderr
return save_env, si, so, sr
def restore_nocgi(sav_env, si, so, sr):
osenv = os.environ
for k in osenv.keys():
del osenv[k]
for k in sav_env:
osenv[k] = sav_env[k]
sys.stdout = si
sys.stdin = so
sys.stderr = sr
def call_string(base_uri,content,opts,params,lines):
new_stdout = VirtCGIStdout();
new_stderr = VirtCGIStdout();
sys.argv = [ base_uri ];
sav_env, si, so, sr = setup_cgi (opts, params, new_stdout, '')
try:
eval (compile (content, base_uri, 'exec'), {})
restore_nocgi (sav_env, si, so, sr)
body=new_stdout.get_body ();
hdr=new_stdout.get_headers ();
err=new_stderr.get_headers () + new_stderr.get_body ();
return body, hdr, err
except:
restore_nocgi (sav_env, si, so, sr)
a,b,c = sys.exc_info ();
ex_text = "".join (traceback.format_exception (a,b,c));
body=new_stdout.get_body ();
hdr=new_stdout.get_headers ();
err=new_stderr.get_headers () + new_stderr.get_body ();
return body, hdr, err, ex_text
def call_file(base_uri,opts,params,lines):
new_stdout = VirtCGIStdout();
new_stderr = VirtCGIStdout();
sys.argv = [ base_uri ];
sav_env, si, so, sr = setup_cgi (opts, params, new_stdout, '')
try:
execfile (base_uri, {});
restore_nocgi (sav_env, si, so, sr)
body=new_stdout.get_body ();
hdr=new_stdout.get_headers ();
err=new_stderr.get_headers () + new_stderr.get_body ();
return body, hdr, err
except:
restore_nocgi (sav_env, si, so, sr)
a,b,c = sys.exc_info ();
ex_text = "".join (traceback.format_exception (a,b,c));
body=new_stdout.get_body ();
hdr=new_stdout.get_headers ();
err=new_stderr.get_headers () + new_stderr.get_body ();
return body, hdr, err, ex_text
# testting code
if __name__ == '__main__':
if os.environ.has_key ("__VIRT_CGI") and os.environ["__VIRT_CGI"] != '1' and not 12 == 11:
print ("xx");
a,b,c = call_file ('../lib/suite/admin/cgitest.py', { '__VIRT_CGI': '1' }, '', '');
d = ''
sys.stderr.write ('\n['+a+']['+b+']['+c+']['+d+']\n');
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