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#!/usr/local/bin/python3
# -*- coding: utf-8 -*-
# Maintainer: Ivan Herman <ivan@w3.org>
"""
Possible CGI entry point for the RDFa 1.1 package.
This version is adapted to the particualarities of the W3C setup as well as my own machine for Python paths
@author: U{Ivan Herman<a href="http://www.w3.org/People/Ivan/">}
@license: This software is available for use under the
U{W3C® SOFTWARE NOTICE AND LICENSE<href="http://www.w3.org/Consortium/Legal/2002/copyright-software-20021231">}
@contact: Ivan Herman, ivan@w3.org
"""
"""
$Id: RDFa.py,v 1.27 2018/05/23 08:57:19 carcone Exp $
"""
__version__ = "4.0.0"
import cgi
import cgitb
import sys, os
#import StringIO
#cgi.print_environ()
if sys.platform == "darwin" :
# this is my local machine
sys.path.insert(0,'/Users/ivan/Library/Python')
sys.path.insert(0,'/Users/ivan/Library/Python/RDFa')
os.environ['PyRdfaCacheDir'] = '/Users/ivan/.pyrdfa-cache'
cgitb.enable()
else :
# This will have to be updated for the Python3 installation!!!
# webencodings pip3 should also be done!!!
sys.path.insert(0,"/usr/lib/python2.7/dist-packages")
sys.path.insert(0,'/home/ivan/lib/python')
os.environ['PyRdfaCacheDir'] = '/usr/local/apache/cgi/cgi-bin-other/RDFa/data-local'
cgitb.enable(display=0, logdir="/home/nobody/tracebacks/")
from pyRdfa import processURI, RDFaError
# Register the RDFa JSON-LD serializer; for some reasons installing via pip did not work
from rdflib.plugin import register, Serializer
register('json', Serializer, 'rdflib_jsonld.serializer', 'JsonLDSerializer')
def err_message(msg) :
from cleanhtml import clean_print
print('Content-type: text/html; charset=utf-8')
print('Status: 400 Invalid Input')
print()
print("<html>")
print("<head>")
print("<title>Error in RDFa processing</title>")
print("</head><body>")
print("<h1>Error in distilling RDFa</h1>")
print("<p>")
clean_print("pyRdfa cannot process this URI: %s", uri)
print("</p>")
if len(msg) != 0 :
print("<p>")
clean_print(msg)
print("</p>")
print("</body>")
print("</html>")
sys.exit(1)
def brett_test(uri) :
if not sys.platform == "darwin" :
from checkremote import check_url_safety, UnsupportedResourceError
from urllib2 import HTTPError, URLError
try:
check_url_safety(uri)
except HTTPError as e:
err_message('HTTP Error with the error code: %s and the error message: "%s"' (e.code, e.reason))
except URLError as e:
err_message('URL Error with the error message: "%s"' % e.reason)
except UnsupportedResourceError as e:
msg = e.args[0] + ": " + e.args[1]
err_message('Unsupported Resource Error with the error message "%s"' % msg)
except Exception as e:
l = len(e.args)
msg = "" if l == 0 else (e.args[0] if l == 1 else e.args)
err_message('Exception raised: "%s"' % msg)
#
# to make this thing exist...
uri = ""
form = cgi.FieldStorage()
# First see if an upload is present in the form
if "uploaded" in form and form["uploaded"].file :
uri = "uploaded:"
elif "text" in form and form["text"].value != None and len(form["text"].value.strip()) != 0 :
uri = "text:"
else :
if not "uri" in form :
print('Content-type: text/html; charset=utf-8')
print('Status: 400 Invalid Input')
print()
print("<html>")
print("<head>")
print("<title>Error in RDFa processing</title>")
print("</head><body>")
print("<h1>Error in distilling RDFa</h1>")
print("<p>No URI has been specified</p>")
print("</body>")
print("</html>")
sys.exit(1)
try :
uri = form.getfirst("uri")
except :
print('Content-type: text/html; charset=utf-8')
print('Status: 400 Invalid Input')
print()
print("<html>")
print("<head>")
print("<title>Error in RDFa processing</title>")
print("</head><body>")
print("<h1>Error in distilling RDFa</h1>")
print("<p>No URI has been specified</p>")
print("</body>")
print("</html>")
sys.exit(1)
if "validate" in form :
from rdfavalidator import validateURI
if not (uri == 'text:' or uri == 'uploaded:') :
brett_test(uri)
print('Content-Type: text/html; charset=utf-8')
print()
print(validateURI(uri, form))
else :
try :
# Thanks to Sergio and Diego for the idea and code for the referer branch
if uri == "referer" :
uri = os.getenv('HTTP_REFERER')
if uri is None:
newuri = "http://www.w3.org/2012/pyRdfa/no_referer.html"
else:
brett_test(uri)
newuri = "http://www.w3.org/2012/pyRdfa/extract?uri=" + uri
print("Status: 307 Moved Temporarily")
print("Location: " + newuri)
print()
else :
# last point of check: use Brett's script to check the validity of the URI
if not (uri == 'text:' or uri == 'uploaded:') :
brett_test(uri)
if "format" in form.keys() :
format = form.getfirst("format")
else :
format = "turtle"
retval = processURI(uri, format, form)
print(retval)
except Exception as e :
l = len(e.args)
msg = "" if l == 0 else (e.args[0] if l == 1 else e.args)
err_message('Exception raised: "%s"' % msg)
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