mirror of https://github.com/python/cpython.git
File upload and revamped documentation.
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Guido van Rossum
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Lib/cgi.py
713
Lib/cgi.py
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@ -1,65 +1,369 @@
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#!/usr/local/bin/python
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# XXX TODO
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# - proper doc strings instead of this rambling dialogue style
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# - more utilities, e.g.
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# - print_header(type="test/html", blankline=1) -- print MIME header
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# - utility to format a nice error message in HTML
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# - utility to format a Location: ... response, including HTML
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# - utility to catch errors and display traceback
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"""Support module for CGI (Common Gateway Interface) scripts.
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#
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# A class for wrapping the WWW Forms Common Gateway Interface (CGI)
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# Michael McLay, NIST mclay@eeel.nist.gov 6/14/94
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#
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# modified by Steve Majewski <sdm7g@Virginia.EDU> 12/5/94
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#
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# now maintained as part of the Python distribution
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# Several classes to parse the name/value pairs that are passed to
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# a server's CGI by GET, POST or PUT methods by a WWW FORM. This
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# module is based on Mike McLay's original cgi.py after discussing
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# changes with him and others on the comp.lang.python newsgroup, and
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# at the NIST Python workshop.
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#
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# The rationale for changes was:
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# The original FormContent class was almost, but not quite like
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# a dictionary object. Besides adding some extra access methods,
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# it had a values() method with different arguments and semantics
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# from the standard values() method of a mapping object. Also,
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# it provided several different access methods that may be necessary
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# or useful, but made it a little more confusing to figure out how
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# to use. Also, we wanted to make the most typical cases the simplest
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# and most convenient access methods. ( Most form fields just return
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# a single value, and in practice, a lot of code was just assuming
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# a single value and ignoring all others. On the other hand, the
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# protocol allows multiple values to be returned.
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#
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# The new base class (FormContentDict) is just like a dictionary.
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# In fact, if you just want a dictionary, all of the stuff that was
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# in __init__ has been extracted into a cgi.parse() function that will
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# return the "raw" dictionary, but having a class allows you to customize
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# it further.
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# Mike McLay's original FormContent class is reimplemented as a
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# subclass of FormContentDict.
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# There are two additional sub-classes, but I'm not yet too sure
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# whether they are what I want.
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#
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import string,regsub,sys,os,urllib
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# since os.environ may often be used in cgi code, we name it in this module.
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from os import environ
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This module defines a number of utilities for use by CGI scripts written in
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Python.
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def parse():
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"""Parse the query passed in the environment or on stdin"""
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Introduction
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------------
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A CGI script is invoked by an HTTP server, usually to process user input
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submitted through an HTML <FORM> or <ISINPUT> element.
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Most often, CGI scripts live in the server's special cgi-bin directory.
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The HTTP server places all sorts of information about the request (such as
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the client's hostname, the requested URL, the query string, and lots of
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other goodies) in the script's shell environment, executes the script, and
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sends the script's output back to the client.
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The script's input is connected to the client too, and sometimes the form
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data is read this way; at other times the form data is passed via the
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"query string" part of the URL. This module (cgi.py) is intended to take
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care of the different cases and provide a simpler interface to the Python
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script. It also provides a number of utilities that help in debugging
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scripts, and the latest addition is support for file uploads from a form
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(if your browser supports it -- Grail 0.3 and Netscape 2.0 do).
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The output of a CGI script should consist of two sections, separated by a
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blank line. The first section contains a number of headers, telling the
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client what kind of data is following. Python code to generate a minimal
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header section looks like this:
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print "Content-type: text/html" # HTML is following
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print # blank line, end of headers
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The second section is usually HTML, which allows the client software to
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display nicely formatted text with header, in-line images, etc. Here's
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Python code that prints a simple piece of HTML:
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print "<TITLE>CGI script output</TITLE>"
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print "<H1>This is my first CGI script</H1>"
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print "Hello, world!"
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(It may not be fully legal HTML according to the letter of the standard,
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but any browser will understand it.)
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Using the cgi module
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--------------------
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Begin by writing "import cgi". Don't use "from cgi import *" -- the module
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defines all sorts of names for its own use that you don't want in your
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namespace.
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If you have a standard form, it's best to use the SvFormContentDict class.
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Instantiate the SvFormContentDict class exactly once: it consumes any input
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on standard input, which can't be wound back (it's a network connection,
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not a disk file).
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The SvFormContentDict instance can be accessed as if it were a Python
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dictionary. For instance, the following code checks that the fields
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"name" and "addr" are both set to a non-empty string:
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form = SvFormContentDict()
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form_ok = 0
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if form.has_key("name") and form.has_key("addr"):
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if form["name"] != "" and form["addr"] != "":
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form_ok = 1
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if not form_ok:
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print "<H1>Error</H1>"
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print "Please fill in the name and addr fields."
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return
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...actual form processing here...
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If you have an input item of type "file" in your form and the client
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supports file uploads, the value for that field, if present in the form,
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is not a string but a tuple of (filename, content-type, data).
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Overview of classes
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-------------------
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SvFormContentDict: single value form content as dictionary; described
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above.
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FormContentDict: multiple value form content as dictionary (the form items
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are lists of values). Useful if your form contains multiple fields with
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the same name.
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Other classes (FormContent, InterpFormContentDict) are present for
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backwards compatibility only.
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Overview of functions
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---------------------
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These are useful if you want more control, or if you want to employ some
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of the algorithms implemented in this module in other circumstances.
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parse(): parse a form into a Python dictionary.
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parse_qs(qs): parse a query string.
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parse_multipart(...): parse input of type multipart/form-data (for file
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uploads).
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parse_header(string): parse a header like Content-type into a main value
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and a dictionary of parameters.
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test(): complete test program.
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print_environ(): format the shell environment in HTML.
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print_form(form): format a form in HTML.
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print_environ_usage(): print a list of useful environment variables in HTML.
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escape(): convert the characters "&", "<" and ">" to HTML-safe sequences.
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Caring about security
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---------------------
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There's one important rule: if you invoke an external program (e.g. via
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the os.system() or os.popen() functions), make very sure you don't pass
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arbitrary strings received from the client to the shell. This is a
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well-known security hole whereby clever hackers anywhere on the web can
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exploit a gullible CGI script to invoke arbitrary shell commands. Even
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parts of the URL or field names cannot be trusted, since the request
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doesn't have to come from your form!
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To be on the safe side, if you must pass a string gotten from a form to a
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shell command, you should make sure the string contains only alphanumeric
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characters, dashes, underscores, and periods.
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Installing your CGI script on a Unix system
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-------------------------------------------
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Read the documentation for your HTTP server and check with your local
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system administrator to find the directory where CGI scripts should be
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installed; usually this is in a directory cgi-bin in the server tree.
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Make sure that your script is readable and executable by "others"; the Unix
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file mode should be 755 (use "chmod 755 filename"). Make sure that the
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first line of the script contains "#!" starting in column 1 followed by the
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pathname of the Python interpreter, for instance:
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#!/usr/local/bin/python
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Make sure the Python interpreter exists and is executable by "others".
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Make sure that any files your script needs to read or write are readable or
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writable, respectively, by "others" -- their mode should be 644 for
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readable and 666 for writable. This is because, for security reasons, the
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HTTP server executes your script as user "nobody", without any special
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privileges. It can only read (write, execute) files that everybody can
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read (write, execute). The current directory at execution time is also
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different (it is usually the server's cgi-bin directory) and the set of
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environment variables is also different from what you get at login. in
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particular, don't count on the shell's search path for executables ($PATH)
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or the Python module search path ($PYTHONPATH) to be set to anything
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interesting.
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If you need to load modules from a directory which is not on Python's
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default module search path, you can change the path in your script, before
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importing other modules, e.g.:
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import sys
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sys.path.insert(0, "/usr/home/joe/lib/python")
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sys.path.insert(0, "/usr/local/lib/python")
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(This way, the directory inserted last will be searched first!)
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Instructions for non-Unix systems will vary; check your HTTP server's
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documentation (it will usually have a section on CGI scripts).
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Testing your CGI script
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-----------------------
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Unfortunately, a CGI script will generally not run when you try it from the
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command line, and a script that works perfectly from the command line may
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fail mysteriously when run from the server. There's one reason why you
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should still test your script from the command line: if it contains a
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syntax error, the python interpreter won't execute it at all, and the HTTP
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server will most likely send a cryptic error to the client.
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Assuming your script has no syntax errors, yet it does not work, you have
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no choice but to read the next section:
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Debugging CGI scripts
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---------------------
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First of all, check for trivial installation errors -- reading the section
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above on installing your CGI script carefully can save you a lot of time.
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If you wonder whether you have understood the installation procedure
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correctly, try installing a copy of this module file (cgi.py) as a CGI
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script. When invoked as a script, the file will dump its environment and
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the contents of the form in HTML form. Give it the right mode etc, and
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send it a request. If it's installed in the standard cgi-bin directory, it
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should be possible to send it a request by entering a URL into your browser
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of the form:
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http://yourhostname/cgi-bin/cgi.py?name=Joe+Blow&addr=At+Home
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If this gives an error of type 404, the server cannot find the script --
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perhaps you need to install it in a different directory. If it gives
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another error (e.g. 500), there's an installation problem that you should
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fix before trying to go any further. If you get a nicely formatted listing
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of the environment and form content (in this example, the fields should be
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listed as "addr" with value "At Home" and "name" with value "Joe Blow"),
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the cgi.py script has been installed correctly. If you follow the same
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procedure for your own script, you should now be able to debug it.
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The next step could be to call the cgi module's test() function from your
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script: replace its main code with the single statement
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cgi.test()
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This should produce the same results as those gotten from installing the
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cgi.py file itself.
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When an ordinary Python script raises an unhandled exception (e.g. because
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of a typo in a module name, a file that can't be opened, etc.), the Python
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interpreter prints a nice traceback and exits. While the Python
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interpreter will still do this when your CGI script raises an exception,
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most likely the traceback will end up in one of the HTTP server's log
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file, or be discarded altogether.
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Fortunately, once you have managed to get your script to execute *some*
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code, it is easy to catch exceptions and cause a traceback to be printed.
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The test() function below in this module is an example. Here are the
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rules:
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1. Import the traceback module (before entering the try-except!)
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2. Make sure you finish printing the headers and the blank line early
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3. Assign sys.stderr to sys.stdout
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3. Wrap all remaining code in a try-except statement
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4. In the except clause, call traceback.print_exc()
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For example:
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import sys
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import traceback
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print "Content-type: text/html"
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print
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sys.stderr = sys.stdout
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try:
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...your code here...
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except:
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print "\n\n<PRE>"
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traceback.print_exc()
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Notes: The assignment to sys.stderr is needed because the traceback prints
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to sys.stderr. The print "\n\n<PRE>" statement is necessary to disable the
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word wrapping in HTML.
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If you suspect that there may be a problem in importing the traceback
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module, you can use an even more robust approach (which only uses built-in
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modules):
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import sys
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sys.stderr = sys.stdout
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print "Content-type: text/plain"
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print
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...your code here...
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This relies on the Python interpreter to print the traceback. The content
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type of the output is set to plain text, which disables all HTML
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processing. If your script works, the raw HTML will be displayed by your
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client. If it raises an exception, most likely after the first two lines
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have been printed, a traceback will be displayed. Because no HTML
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interpretation is going on, the traceback will readable.
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Good luck!
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Common problems and solutions
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-----------------------------
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- Most HTTP servers buffer the output from CGI scripts until the script is
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completed. This means that it is not possible to display a progress report
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on the client's display while the script is running.
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- Check the installation instructions above.
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- Check the HTTP server's log files. ("tail -f logfile" in a separate
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window may be useful!)
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- Always check a script for syntax errors first, by doing something like
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"python script.py".
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- When using any of the debugging techniques, don't forget to add
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"import sys" to the top of the script.
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- When invoking external programs, make sure they can be found. Usually,
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this means using absolute path names -- $PATH is usually not set to a
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very useful value in a CGI script.
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- When reading or writing external files, make sure they can be read or
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written by every user on the system.
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- Don't try to give a CGI script a set-uid mode. This doesn't work on most
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systems, and is a security liability as well.
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History
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-------
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Michael McLay started this module. Steve Majewski changed the interface to
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SvFormContentDict and FormContentDict. The multipart parsing was inspired
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by code submitted by Andreas Paepcke. Guido van Rossum rewrote,
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reformatted and documented the module and is currently responsible for its
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maintenance.
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"""
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# Imports
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# =======
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import string
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import regsub
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import sys
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import os
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import urllib
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# A shorthand for os.environ
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environ = os.environ
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# Parsing functions
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# =================
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def parse(fp=None):
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"""Parse a query in the environment or from a file (default stdin)"""
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if not fp:
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fp = sys.stdin
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if not environ.has_key('REQUEST_METHOD'):
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environ['REQUEST_METHOD'] = 'GET' # For testing
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if environ['REQUEST_METHOD'] == 'POST':
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qs = sys.stdin.read(string.atoi(environ['CONTENT_LENGTH']))
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ctype, pdict = parse_header(environ['CONTENT_TYPE'])
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if ctype == 'multipart/form-data':
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return parse_multipart(fp, ctype, pdict)
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elif ctype == 'application/x-www-form-urlencoded':
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clength = string.atoi(environ['CONTENT_LENGTH'])
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qs = fp.read(clength)
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else:
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qs = '' # Bad content-type
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environ['QUERY_STRING'] = qs
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elif environ.has_key('QUERY_STRING'):
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qs = environ['QUERY_STRING']
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else:
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environ['QUERY_STRING'] = qs = ''
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if sys.argv[1:]:
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qs = sys.argv[1]
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else:
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qs = ""
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environ['QUERY_STRING'] = qs
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return parse_qs(qs)
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@ -81,21 +385,129 @@ def parse_qs(qs):
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return dict
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def parse_multipart(fp, ctype, pdict):
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"""Parse multipart input.
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# The FormContent constructor creates a dictionary from the name/value pairs
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# passed through the CGI interface.
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Arguments:
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fp : input file
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ctype: content-type
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pdict: dictionary containing other parameters of conten-type header
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Returns a dictionary just like parse_qs() (keys are the field
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names, each value is a list of values for that field) except
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that if the value was an uploaded file, it is a tuple of the
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form (filename, content-type, data). Note that content-type
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is the raw, unparsed contents of the content-type header.
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XXX Should we parse further when the content-type is
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multipart/*?
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"""
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import mimetools
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if pdict.has_key('boundary'):
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boundary = pdict['boundary']
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else:
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boundary = ""
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nextpart = "--" + boundary
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lastpart = "--" + boundary + "--"
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partdict = {}
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terminator = ""
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while terminator != lastpart:
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bytes = -1
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data = None
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if terminator:
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# At start of next part. Read headers first.
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headers = mimetools.Message(fp)
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clength = headers.getheader('content-length')
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if clength:
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try:
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bytes = string.atoi(clength)
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except string.atoi_error:
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pass
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if bytes > 0:
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data = fp.read(bytes)
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else:
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data = ""
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# Read lines until end of part.
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lines = []
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while 1:
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line = fp.readline()
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if not line:
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terminator = lastpart # End outer loop
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break
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if line[:2] == "--":
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terminator = string.strip(line)
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if terminator in (nextpart, lastpart):
|
||||
break
|
||||
if line[-2:] == '\r\n':
|
||||
line = line[:-2]
|
||||
elif line[-1:] == '\n':
|
||||
line = line[:-1]
|
||||
lines.append(line)
|
||||
# Done with part.
|
||||
if data is None:
|
||||
continue
|
||||
if bytes < 0:
|
||||
data = string.joinfields(lines, "\n")
|
||||
line = headers['content-disposition']
|
||||
if not line:
|
||||
continue
|
||||
key, params = parse_header(line)
|
||||
if key != 'form-data':
|
||||
continue
|
||||
if params.has_key('name'):
|
||||
name = params['name']
|
||||
else:
|
||||
continue
|
||||
if params.has_key('filename'):
|
||||
data = (params['filename'],
|
||||
headers.getheader('content-type'), data)
|
||||
if partdict.has_key(name):
|
||||
partdict[name].append(data)
|
||||
else:
|
||||
partdict[name] = [data]
|
||||
|
||||
return partdict
|
||||
|
||||
|
||||
#
|
||||
# form['key']
|
||||
# form.__getitem__('key')
|
||||
# form.has_key('key')
|
||||
# form.keys()
|
||||
# form.values()
|
||||
# form.items()
|
||||
# form.dict
|
||||
def parse_header(line):
|
||||
"""Parse a Content-type like header.
|
||||
|
||||
Return the main content-type and a dictionary of options.
|
||||
|
||||
"""
|
||||
plist = map(string.strip, string.splitfields(line, ';'))
|
||||
key = string.lower(plist[0])
|
||||
del plist[0]
|
||||
pdict = {}
|
||||
for p in plist:
|
||||
i = string.find(p, '=')
|
||||
if i >= 0:
|
||||
name = string.lower(string.strip(p[:i]))
|
||||
value = string.strip(p[i+1:])
|
||||
if len(value) >= 2 and value[0] == value[-1] == '"':
|
||||
value = value[1:-1]
|
||||
pdict[name] = value
|
||||
return key, pdict
|
||||
|
||||
|
||||
# Main classes
|
||||
# ============
|
||||
|
||||
class FormContentDict:
|
||||
"""Basic (multiple values per field) form content as dictionary.
|
||||
|
||||
form = FormContentDict()
|
||||
|
||||
form[key] -> [value, value, ...]
|
||||
form.has_key(key) -> Boolean
|
||||
form.keys() -> [key, key, ...]
|
||||
form.values() -> [[val, val, ...], [val, val, ...], ...]
|
||||
form.items() -> [(key, [val, val, ...]), (key, [val, val, ...]), ...]
|
||||
form.dict == {key: [val, val, ...], ...}
|
||||
|
||||
"""
|
||||
def __init__( self ):
|
||||
self.dict = parse()
|
||||
self.query_string = environ['QUERY_STRING']
|
||||
|
|
@ -113,45 +525,42 @@ def __len__( self ):
|
|||
return len(self.dict)
|
||||
|
||||
|
||||
# This is the "strict" single-value expecting version.
|
||||
# IF you only expect a single value for each field, then form[key]
|
||||
# will return that single value ( the [0]-th ), and raise an
|
||||
# IndexError if that expectation is not true.
|
||||
# IF you expect a field to have possible multiple values, than you
|
||||
# can use form.getlist( key ) to get all of the values.
|
||||
# values() and items() are a compromise: they return single strings
|
||||
# where there is a single value, and lists of strings otherwise.
|
||||
|
||||
class SvFormContentDict(FormContentDict):
|
||||
def __getitem__( self, key ):
|
||||
if len( self.dict[key] ) > 1 :
|
||||
"""Strict single-value expecting form content as dictionary.
|
||||
|
||||
IF you only expect a single value for each field, then form[key]
|
||||
will return that single value.
|
||||
It will raise an IndexError if that expectation is not true.
|
||||
IF you expect a field to have possible multiple values, than you
|
||||
can use form.getlist(key) to get all of the values.
|
||||
values() and items() are a compromise: they return single strings
|
||||
where there is a single value, and lists of strings otherwise.
|
||||
|
||||
"""
|
||||
def __getitem__(self, key):
|
||||
if len(self.dict[key]) > 1:
|
||||
raise IndexError, 'expecting a single value'
|
||||
return self.dict[key][0]
|
||||
def getlist( self, key ):
|
||||
def getlist(self, key):
|
||||
return self.dict[key]
|
||||
def values( self ):
|
||||
def values(self):
|
||||
lis = []
|
||||
for each in self.dict.values() :
|
||||
for each in self.dict.values():
|
||||
if len( each ) == 1 :
|
||||
lis.append( each[0] )
|
||||
else: lis.append( each )
|
||||
lis.append(each[0])
|
||||
else: lis.append(each)
|
||||
return lis
|
||||
def items( self ):
|
||||
def items(self):
|
||||
lis = []
|
||||
for key,value in self.dict.items():
|
||||
if len(value) == 1 :
|
||||
lis.append( (key,value[0]) )
|
||||
else: lis.append( (key,value) )
|
||||
lis.append((key, value[0]))
|
||||
else: lis.append((key, value))
|
||||
return lis
|
||||
|
||||
|
||||
# And this sub-class is similar to the above, but it will attempt to
|
||||
# interpret numerical values. This is here as mostly as an example,
|
||||
# but I think the real way to handle typed-data from a form may be
|
||||
# to make an additional table driver parsing stage that has a table
|
||||
# of allowed input patterns and the output conversion types - it
|
||||
# would signal type-errors on parse, not on access.
|
||||
class InterpFormContentDict(SvFormContentDict):
|
||||
"""This class is present for backwards compatibility only."""
|
||||
def __getitem__( self, key ):
|
||||
v = SvFormContentDict.__getitem__( self, key )
|
||||
if v[0] in string.digits+'+-.' :
|
||||
|
|
@ -178,28 +587,8 @@ def items( self ):
|
|||
return lis
|
||||
|
||||
|
||||
# class FormContent parses the name/value pairs that are passed to a
|
||||
# server's CGI by GET, POST, or PUT methods by a WWW FORM. several
|
||||
# specialized FormContent dictionary access methods have been added
|
||||
# for convenience.
|
||||
|
||||
# function return value
|
||||
#
|
||||
# form.keys() all keys in dictionary
|
||||
# form.has_key('key') test keys existance
|
||||
# form[key] returns list associated with key
|
||||
# form.values('key') key's list (same as form.[key])
|
||||
# form.indexed_value('key' index) nth element in key's value list
|
||||
# form.value(key) key's unstripped value
|
||||
# form.length(key) number of elements in key's list
|
||||
# form.stripped(key) key's value with whitespace stripped
|
||||
# form.pars() full dictionary
|
||||
|
||||
|
||||
|
||||
class FormContent(FormContentDict):
|
||||
# This is the original FormContent semantics of values,
|
||||
# not the dictionary like semantics.
|
||||
"""This class is present for backwards compatibility only."""
|
||||
def values(self,key):
|
||||
if self.dict.has_key(key):return self.dict[key]
|
||||
else: return None
|
||||
|
|
@ -221,14 +610,66 @@ def pars(self):
|
|||
return self.dict
|
||||
|
||||
|
||||
# Test/debug code
|
||||
# ===============
|
||||
|
||||
def test():
|
||||
"""Robust test CGI script.
|
||||
|
||||
Dump all information provided to the script in HTML form.
|
||||
|
||||
"""
|
||||
import traceback
|
||||
print "Content-type: text/html"
|
||||
print
|
||||
sys.stderr = sys.stdout
|
||||
try:
|
||||
print_environ()
|
||||
print_form(FormContentDict())
|
||||
print
|
||||
print "<H3>Current Working Directory</H3>"
|
||||
try:
|
||||
pwd = os.getcwd()
|
||||
except os.error, msg:
|
||||
print "os.error:", escape(str(msg))
|
||||
else:
|
||||
print escape(pwd)
|
||||
print
|
||||
except:
|
||||
print "\n\n<PRE>" # Turn of word wrap
|
||||
traceback.print_exc()
|
||||
|
||||
def print_environ():
|
||||
"""Dump the shell environment in HTML form."""
|
||||
keys = environ.keys()
|
||||
keys.sort()
|
||||
print
|
||||
print "<H3>Shell environment:</H3>"
|
||||
print "<DL>"
|
||||
for key in keys:
|
||||
print "<DT>", escape(key), "<DD>", escape(environ[key])
|
||||
print "</DL>"
|
||||
print
|
||||
|
||||
def print_form(form):
|
||||
"""Dump the contents of a form in HTML form."""
|
||||
keys = form.keys()
|
||||
keys.sort()
|
||||
print
|
||||
print "<H3>Form contents:</H3>"
|
||||
print "<DL>"
|
||||
for key in keys:
|
||||
print "<DT>" + escape(key) + ":",
|
||||
print "<i>" + escape(`type(form[key])`) + "</i>"
|
||||
print "<DD>" + escape(`form[key]`)
|
||||
print "</DL>"
|
||||
print
|
||||
|
||||
def print_environ_usage():
|
||||
"""Print a list of environment variables used by the CGI protocol."""
|
||||
print """
|
||||
<H3>These operating system environment variables could have been
|
||||
set:</H3> <UL>
|
||||
<H3>These environment variables could have been set:</H3>
|
||||
<UL>
|
||||
<LI>AUTH_TYPE
|
||||
<LI>CONTENT_LENGTH
|
||||
<LI>CONTENT_TYPE
|
||||
|
|
@ -257,47 +698,21 @@ def print_environ_usage():
|
|||
</UL>
|
||||
"""
|
||||
|
||||
def print_environ():
|
||||
skeys = environ.keys()
|
||||
skeys.sort()
|
||||
print '<h3> The following environment variables ' \
|
||||
'were set by the CGI script: </h3>'
|
||||
print '<dl>'
|
||||
for key in skeys:
|
||||
print '<dt>', escape(key), '<dd>', escape(environ[key])
|
||||
print '</dl>'
|
||||
|
||||
def print_form( form ):
|
||||
skeys = form.keys()
|
||||
skeys.sort()
|
||||
print '<h3> The following name/value pairs ' \
|
||||
'were entered in the form: </h3>'
|
||||
print '<dl>'
|
||||
for key in skeys:
|
||||
print '<dt>', escape(key), ':',
|
||||
print '<i>', escape(`type(form[key])`), '</i>',
|
||||
print '<dd>', escape(`form[key]`)
|
||||
print '</dl>'
|
||||
# Utilities
|
||||
# =========
|
||||
|
||||
def escape( s ):
|
||||
s = regsub.gsub('&', '&', s) # Must be done first
|
||||
s = regsub.gsub('<', '<', s)
|
||||
s = regsub.gsub('>', '>', s)
|
||||
def escape(s):
|
||||
"""Replace special characters '&', '<' and '>' by SGML entities."""
|
||||
s = regsub.gsub("&", "&", s) # Must be done first!
|
||||
s = regsub.gsub("<", "<", s)
|
||||
s = regsub.gsub(">", ">", s)
|
||||
return s
|
||||
|
||||
def test( what ):
|
||||
label = escape(str(what))
|
||||
print 'Content-type: text/html\n\n'
|
||||
print '<HEADER>\n<TITLE>' + label + '</TITLE>\n</HEADER>\n'
|
||||
print '<BODY>\n'
|
||||
print "<H1>" + label +"</H1>\n"
|
||||
form = what()
|
||||
print_form( form )
|
||||
print_environ()
|
||||
print_environ_usage()
|
||||
print '</body>'
|
||||
|
||||
if __name__ == '__main__' :
|
||||
test_classes = ( FormContent, FormContentDict, SvFormContentDict, InterpFormContentDict )
|
||||
test( test_classes[0] ) # by default, test compatibility with
|
||||
# old version, change index to test others.
|
||||
# Invoke mainline
|
||||
# ===============
|
||||
|
||||
# Call test() when this file is run as a script (not imported as a module)
|
||||
if __name__ == '__main__':
|
||||
test()
|
||||
|
|
|
|||
Loading…
Reference in New Issue