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from SocketServer import ThreadingMixIn
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import BaseHTTPServer
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from BaseHTTPServer import BaseHTTPRequestHandler
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import urlparse
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import cgi
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import logging
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import tempfile
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import os
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import base64
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import hashlib
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from formrender import FormRender
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html_header = u'''<html>
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<head>
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<meta charset="UTF-8">
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<style>
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/* Default classes */
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.btn {{ color: #FFFFFF; font-weight: bold; font-size: 0.9em;
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background-color: #1D98E4; padding: 9px; border-radius: 4px;
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border-width: 0px; text-decoration: none; }}
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.btn-act {{ background-color: #1D98E4; }}
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.btn-lnk {{ background-color: #D0D0D0; }}
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.error {{ color: #FF0000; }}
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/* Main element markup */
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*,body {{ font-family: sans-serif; }}
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h1 {{ color: #555555; text-align: center; margin: 32px auto 32px auto; }}
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pre {{ font-family: monospace; }}
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/* List of available forms */
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div.list {{ width: 50%; margin: 40px auto 0px auto; }}
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div.list li {{ font-size: 0.90em; list-style: none;
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margin-bottom: 65px; }}
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div.list h2 {{ background-color: #E0E5E5;
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border-radius: 3px; font-weight: bold;
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padding: 10px; font-size: 1.2em; }}
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div.list p.form-description {{ margin-left: 25px; }}
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div.list a.form-link {{ margin-left: 25px; }}
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/* Form display */
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div.form {{ width: 50%; margin: 40px auto 0px auto; }}
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div.form h2 {{ font-weight: bold; background-color: #E0E5E5; padding: 25px;
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border-radius: 10px; }}
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div.form p.form-description {{ font-size: 0.90em;
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margin: 40px 25px 65px 25px; }}
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div.form li {{ font-size: 0.90em; list-style: none; }}
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div.form li.hidden {{ display: none; }}
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div.form p.form-field-title {{ margin-bottom: 0px; }}
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div.form p.form-field-input {{ margin-top: 0px; }}
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div.form li.checkbox p.form-field-input {{ float: left; margin-right: 8px; }}
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select,
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textarea,
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input[type=text],
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input[type=number],
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input[type=date],
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input[type=password] {{ color: #606060; padding: 9px; border-radius: 4px;
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border: 1px solid #D0D0D0;
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background-color: #F9F9F9; }}
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textarea {{ font-family: monospace; }}
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/* Result display */
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div.result {{ width: 50%; margin: 40px auto 0px auto; }}
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div.result h2 {{ background-color: #E0E5E5; border-radius: 3px;
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font-weight: bold; padding: 10px; }}
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div.result div.result-result {{ margin-left: 25px; }}
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div.result ul.nav {{ margin: 64px 0px 128px 0px; padding-left: 0px; }}
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div.result ul.nav li {{ list-style: none; float: left;
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font-size: 0.90em; margin-right: 20px; }}
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/* Other */
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div.about {{ text-align: center; font-size: 12px; color: #808080; }}
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div.about a {{ text-decoration: none; color: #000000; }}
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/* Custom css */
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{custom_css}
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</style>
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</head>
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<body>
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<h1>{title}</h1>
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<div class="page">
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'''
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html_footer = u'''
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<div class="about">Powered by <a href="https://github.com/fboender/scriptform">Scriptform</a> v%%VERSION%%</div>
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</div>
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</body>
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</html>
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'''
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html_list = u''''
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{header}
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<div class="list">
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{form_list}
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</div>
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{footer}
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'''
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html_form = u'''
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{header}
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<div class="form">
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<h2 class="form-title">{title}</h2>
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<p class="form-description">{description}</p>
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<form id="{name}" action="submit" method="post" enctype="multipart/form-data">
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<input type="hidden" name="form_name" value="{name}" />
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<ul>
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{fields}
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<li class="submit">
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<input type="submit" class="btn btn-act" value="{submit_title}" />
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<a href="."><button type="button" class="btn btn-lnk" value="Back">Back to the list</button></a>
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</li>
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</ul>
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</form>
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</div>
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{footer}
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'''
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html_submit_response = u'''
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{header}
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<div class="result">
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<h2 class="result-title">{title}</h2>
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<h3 class="result-subtitle">Result</h3>
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<div class="result-result">{msg}</div>
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<ul class="nav">
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<li>
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<a class="back-form btn btn-lnk" href="form?form_name={form_name}">
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Back to the form
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</a>
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</li>
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<li><a class="btn btn-lnk" href=".">Back to the list</a></li>
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</ul>
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</div>
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{footer}
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'''
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class HTTPError(Exception):
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def __init__(self, status_code, msg, headers=None):
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if headers is None:
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headers = {}
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self.status_code = status_code
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self.msg = msg
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self.headers = headers
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Exception.__init__(self, status_code, msg, headers)
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class ThreadedHTTPServer(ThreadingMixIn, BaseHTTPServer.HTTPServer):
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pass
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class WebAppHandler(BaseHTTPRequestHandler):
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"""
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Basic web server request handler. Handles GET and POST requests. This class
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should be extended with methods (starting with 'h_') to handle the actual
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requests. If no path is set, it dispatches to the 'index' or 'default'
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method.
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"""
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def log_message(self, fmt, *args):
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"""Overrides BaseHTTPRequestHandler which logs to the console. We log
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to our log file instead"""
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fmt = "{} {}"
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self.scriptform.log.info(fmt.format(self.address_string(), args))
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def do_GET(self):
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self._call(*self._parse(self.path))
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def do_POST(self):
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form_values = cgi.FieldStorage(
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fp=self.rfile,
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headers=self.headers,
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environ={'REQUEST_METHOD': 'POST'})
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self._call(self.path.strip('/'), params={'form_values': form_values})
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def _parse(self, reqinfo):
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url_comp = urlparse.urlsplit(reqinfo)
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path = url_comp.path
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qs = urlparse.parse_qs(url_comp.query)
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# Only return the first value of each query var. E.g. for
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# "?foo=1&foo=2" return '1'.
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var_values = dict([(k, v[0]) for k, v in qs.items()])
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return (path.strip('/'), var_values)
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def _call(self, path, params):
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"""
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Find a method to call on self.app_class based on `path` and call it.
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The method that's called is in the form 'h_<PATH>'. If no path was
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given, it will try to call the 'index' method. If no method could be
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found but a `default` method exists, it is called. Otherwise 404 is
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sent.
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Methods should take care of sending proper headers and content
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themselves using self.send_response(), self.send_header(),
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self.end_header() and by writing to self.wfile.
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"""
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method_name = 'h_{0}'.format(path)
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method_cb = None
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try:
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if hasattr(self, method_name) and \
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callable(getattr(self, method_name)):
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method_cb = getattr(self, method_name)
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elif path == '' and hasattr(self, 'index'):
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method_cb = getattr(self, 'index')
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elif hasattr(self, 'default'):
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method_cb = getattr(self, 'default')
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else:
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raise HTTPError(404, "Not found")
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method_cb(**params)
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except HTTPError, e:
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if e.status_code not in (401, ):
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self.scriptform.log.exception(e)
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self.send_response(e.status_code)
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for header_k, header_v in e.headers.items():
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self.send_header(header_k, header_v)
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self.end_headers()
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return False
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except Exception, e:
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self.scriptform.log.exception(e)
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self.send_error(500, "Internal server error")
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raise
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class ScriptFormWebApp(WebAppHandler):
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"""
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This class is a request handler for WebSrv.
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"""
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def index(self):
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"""
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Index handler. If there's only one form defined, render that form.
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Otherwise render a list of available forms.
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"""
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form_config = self.scriptform.get_form_config()
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visible_forms = form_config.get_visible_forms(getattr(self, 'username', None))
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if len(visible_forms) == 1:
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first_form = visible_forms[0]
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return self.h_form(first_form.name)
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else:
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return self.h_list()
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def auth(self):
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"""
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Verify that the user is authenticated. This is required if the form
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definition contains a 'users' field. Returns the username if the user
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is validated or None if no validation is required.. Otherwise, raises a
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401 HTTP back to the client.
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"""
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form_config = self.scriptform.get_form_config()
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self.username = None
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# If a 'users' element was present in the form configuration file, the
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# user must be authenticated.
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if form_config.users:
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authorized = False
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auth_header = self.headers.getheader("Authorization")
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if auth_header is not None:
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auth_unpw = auth_header.split(' ', 1)[1]
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username, password = base64.decodestring(auth_unpw).split(":")
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pw_hash = hashlib.sha256(password).hexdigest()
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# Validate the username and password
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if username in form_config.users and \
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pw_hash == form_config.users[username]:
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self.username = username
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authorized = True
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if not authorized:
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headers = {
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"WWW-Authenticate": 'Basic realm="Private Area"'
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}
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raise HTTPError(401, 'Authenticate', headers)
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return True
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def h_list(self):
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"""
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Render a list of available forms.
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"""
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if not self.auth():
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return
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form_config = self.scriptform.get_form_config()
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h_form_list = []
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for form_def in form_config.get_visible_forms(getattr(self, 'username', None)):
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h_form_list.append(u'''
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<li>
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<h2 class="form-title">{title}</h2>
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<p class="form-description">{description}</p>
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<a class="form-link btn btn-act" href="./form?form_name={name}">
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{title}
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</a>
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</li>
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'''.format(title=form_def.title,
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description=form_def.description,
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name=form_def.name)
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)
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output = html_list.format(
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header=html_header.format(title=form_config.title,
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custom_css=form_config.custom_css),
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footer=html_footer,
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form_list=u''.join(h_form_list)
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)
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self.send_response(200)
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self.send_header('Content-type', 'text/html')
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self.end_headers()
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self.wfile.write(output.encode('utf8'))
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def h_form(self, form_name, errors=None, **form_values):
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"""
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Render a form.
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"""
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if errors is None:
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errors = {}
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if not self.auth():
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return
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form_config = self.scriptform.get_form_config()
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fr = FormRender(None)
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def render_field(field, errors):
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params = {
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'name': field['name'],
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'classes': [],
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}
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|
|
|
|
|
|
|
if field.get('hidden', None):
|
|
|
|
|
params['classes'].append('hidden')
|
|
|
|
|
|
|
|
|
|
params["style"] = field.get("style", "")
|
|
|
|
|
|
|
|
|
|
if field['type'] not in ('file', 'checkbox'):
|
|
|
|
|
params['value'] = form_values.get(field['name'], '')
|
|
|
|
|
|
|
|
|
|
if field['type'] not in ('radio', 'checkbox', 'select'):
|
|
|
|
|
params['required'] = field.get('required', False)
|
|
|
|
|
|
|
|
|
|
if field['type'] in ('string'):
|
|
|
|
|
params['size'] = field.get('size', '')
|
|
|
|
|
|
|
|
|
|
if field['type'] in ('number', 'integer', 'float', 'password'):
|
|
|
|
|
params['minval'] = field.get("min", '')
|
|
|
|
|
|
|
|
|
|
if field['type'] in ('number', 'integer', 'float'):
|
|
|
|
|
params['maxval'] = field.get("max", '')
|
|
|
|
|
|
|
|
|
|
if field['type'] in ('text'):
|
|
|
|
|
params['rows'] = field.get("rows", '')
|
|
|
|
|
params['cols'] = field.get("cols", '')
|
|
|
|
|
|
|
|
|
|
if field['type'] == 'radio':
|
|
|
|
|
if not form_values.get(field['name'], None):
|
|
|
|
|
params['value'] = field['options'][0][0]
|
|
|
|
|
params['options'] = field['options']
|
|
|
|
|
|
|
|
|
|
if field['type'] in ('radio', 'select'):
|
|
|
|
|
params['options'] = field['options']
|
|
|
|
|
|
|
|
|
|
if field['type'] == 'checkbox':
|
|
|
|
|
params['checked'] = False
|
|
|
|
|
if field['name'] in form_values and form_values[field['name']] == 'on':
|
|
|
|
|
params['checked'] = True
|
|
|
|
|
|
|
|
|
|
h_input = fr.r_field(field['type'], **params)
|
|
|
|
|
|
|
|
|
|
return fr.r_form_line(field['type'], field['title'],
|
|
|
|
|
h_input, params['classes'], errors)
|
|
|
|
|
|
|
|
|
|
# Make sure the user is allowed to access this form.
|
|
|
|
|
form_def = form_config.get_form_def(form_name)
|
|
|
|
|
if form_def.allowed_users is not None and \
|
|
|
|
|
self.username not in form_def.allowed_users:
|
|
|
|
|
# FIXME: Raise HTTPError instead?
|
|
|
|
|
self.send_error(401, "You're not authorized to view this form")
|
|
|
|
|
return
|
|
|
|
|
|
|
|
|
|
html_errors = u''
|
|
|
|
|
if errors:
|
|
|
|
|
html_errors = u'<ul>'
|
|
|
|
|
for error in errors:
|
|
|
|
|
html_errors += u'<li class="error">{0}</li>'.format(error)
|
|
|
|
|
html_errors += u'</ul>'
|
|
|
|
|
|
|
|
|
|
output = html_form.format(
|
|
|
|
|
header=html_header.format(title=form_config.title,
|
|
|
|
|
custom_css=form_config.custom_css),
|
|
|
|
|
footer=html_footer,
|
|
|
|
|
title=form_def.title,
|
|
|
|
|
description=form_def.description,
|
|
|
|
|
errors=html_errors,
|
|
|
|
|
name=form_def.name,
|
|
|
|
|
fields=u''.join([render_field(f, errors.get(f['name'], [])) for f in form_def.fields]),
|
|
|
|
|
submit_title=form_def.submit_title
|
|
|
|
|
)
|
|
|
|
|
self.send_response(200)
|
|
|
|
|
self.send_header('Content-type', 'text/html')
|
|
|
|
|
self.end_headers()
|
|
|
|
|
self.wfile.write(output.encode('utf8'))
|
|
|
|
|
|
|
|
|
|
def h_submit(self, form_values):
|
|
|
|
|
"""
|
|
|
|
|
Handle the submitting of a form by validating the values and then doing
|
|
|
|
|
a callback to a script. How the output is
|
|
|
|
|
handled depends on settings in the form definition.
|
|
|
|
|
"""
|
|
|
|
|
if not self.auth():
|
|
|
|
|
return
|
|
|
|
|
|
|
|
|
|
form_config = self.scriptform.get_form_config()
|
|
|
|
|
form_name = form_values.getfirst('form_name', None)
|
|
|
|
|
form_def = form_config.get_form_def(form_name)
|
|
|
|
|
if form_def.allowed_users is not None and \
|
|
|
|
|
self.username not in form_def.allowed_users:
|
|
|
|
|
# FIXME: Raise HTTPError instead?
|
|
|
|
|
self.send_error(401, "You're not authorized to view this form")
|
|
|
|
|
return
|
|
|
|
|
|
|
|
|
|
# Convert FieldStorage to a simple dict, because we're not allowd to
|
|
|
|
|
# add items to it. For normal fields, the form field name becomes the
|
|
|
|
|
# key and the value becomes the field value. For file upload fields, we
|
|
|
|
|
# stream the uploaded file to a temp file and then put the temp file in
|
|
|
|
|
# the destination dict. We also add an extra field with the originally
|
|
|
|
|
# uploaded file's name.
|
|
|
|
|
values = {}
|
|
|
|
|
tmp_files = []
|
|
|
|
|
for field_name in form_values:
|
|
|
|
|
field = form_values[field_name]
|
|
|
|
|
if field.filename is not None:
|
|
|
|
|
# Field is an uploaded file. Stream it to a temp file if
|
|
|
|
|
# something was actually uploaded
|
|
|
|
|
if field.filename == '':
|
|
|
|
|
continue
|
|
|
|
|
tmpfile = tempfile.mktemp(prefix="scriptform_")
|
|
|
|
|
f = file(tmpfile, 'w')
|
|
|
|
|
while True:
|
|
|
|
|
buf = field.file.read(1024 * 16)
|
|
|
|
|
if not buf:
|
|
|
|
|
break
|
|
|
|
|
f.write(buf)
|
|
|
|
|
f.close()
|
|
|
|
|
field.file.close()
|
|
|
|
|
|
|
|
|
|
tmp_files.append(tmpfile) # For later cleanup
|
|
|
|
|
values[field_name] = tmpfile
|
|
|
|
|
values['{0}__name'.format(field_name)] = field.filename
|
|
|
|
|
else:
|
|
|
|
|
# Field is a normal form field. Store its value.
|
|
|
|
|
values[field_name] = form_values.getfirst(field_name, None)
|
|
|
|
|
|
|
|
|
|
# Validate the form values
|
|
|
|
|
form_errors, form_values = form_def.validate(values)
|
|
|
|
|
|
|
|
|
|
if not form_errors:
|
|
|
|
|
# Call user's callback. If a result is returned, we wrap its output
|
|
|
|
|
# in some nice HTML. If no result is returned, the output was raw
|
|
|
|
|
# and the callback should have written its own response to the
|
|
|
|
|
# self.wfile filehandle.
|
|
|
|
|
|
|
|
|
|
# Log the callback and its parameters for auditing purposes.
|
|
|
|
|
log = logging.getLogger('CALLBACK_AUDIT')
|
|
|
|
|
log.info("Calling script {0}".format(form_def.script))
|
|
|
|
|
log.info("User: {0}".format(getattr(self.request, 'username', 'None')))
|
|
|
|
|
log.info("Variables: {0}".format(dict(form_values.items())))
|
|
|
|
|
|
|
|
|
|
result = form_config.callback(form_name, form_values, self.wfile, self.wfile)
|
|
|
|
|
if form_def.output != 'raw':
|
|
|
|
|
# Ignore everything if we're doing raw output, since it's the
|
|
|
|
|
# scripts responsibility.
|
|
|
|
|
if result['exitcode'] != 0:
|
|
|
|
|
msg = u'<span class="error">{0}</span>'.format(cgi.escape(result['stderr'].decode('utf8')))
|
|
|
|
|
else:
|
|
|
|
|
if form_def.output == 'escaped':
|
|
|
|
|
msg = u'<pre>{0}</pre>'.format(cgi.escape(result['stdout'].decode('utf8')))
|
|
|
|
|
else:
|
|
|
|
|
# Non-escaped output (html, usually)
|
|
|
|
|
msg = result['stdout'].decode('utf8')
|
|
|
|
|
|
|
|
|
|
output = html_submit_response.format(
|
|
|
|
|
header=html_header.format(title=form_config.title,
|
|
|
|
|
custom_css=form_config.custom_css),
|
|
|
|
|
footer=html_footer,
|
|
|
|
|
title=form_def.title,
|
|
|
|
|
form_name=form_def.name,
|
|
|
|
|
msg=msg,
|
|
|
|
|
)
|
|
|
|
|
self.send_response(200)
|
|
|
|
|
self.send_header('Content-type', 'text/html')
|
|
|
|
|
self.end_headers()
|
|
|
|
|
self.wfile.write(output.encode('utf8'))
|
|
|
|
|
else:
|
|
|
|
|
# Form had errors
|
|
|
|
|
form_values.pop('form_name')
|
|
|
|
|
self.h_form(form_name, form_errors, **form_values)
|
|
|
|
|
|
|
|
|
|
# Clean up uploaded files
|
|
|
|
|
for file_name in tmp_files:
|
|
|
|
|
if os.path.exists(file_name):
|
|
|
|
|
os.unlink(file_name)
|
|
|
|
|
|
|
|
|
|
def h_static(self, fname):
|
|
|
|
|
"""Serve static files"""
|
|
|
|
|
if not self.auth():
|
|
|
|
|
return
|
|
|
|
|
|
|
|
|
|
form_config = self.scriptform.get_form_config()
|
|
|
|
|
|
|
|
|
|
if not form_config.static_dir:
|
|
|
|
|
# FIXME: Raise Error
|
|
|
|
|
self.send_error(501, "Static file serving not enabled")
|
|
|
|
|
return
|
|
|
|
|
|
|
|
|
|
if '..' in fname:
|
|
|
|
|
# FIXME: Raise Error
|
|
|
|
|
self.send_error(403, "Invalid file name")
|
|
|
|
|
return
|
|
|
|
|
|
|
|
|
|
path = os.path.join(form_config.static_dir, fname)
|
|
|
|
|
if not os.path.exists(path):
|
|
|
|
|
# FIXME: Raise Error
|
|
|
|
|
self.send_error(404, "Not found")
|
|
|
|
|
return
|
|
|
|
|
|
|
|
|
|
f = file(path, 'r')
|
|
|
|
|
self.send_response(200)
|
|
|
|
|
self.end_headers()
|
|
|
|
|
self.wfile.write(f.read())
|
