cgi in Python

《programming python》
16.4. Climbing the CGI Learning Curve


cgi 把 html submit 的数据或 url query 作为脚本的 stdin，并把脚本的输出转向给 client

输入类似一个dictionary
http://localhost/cgi-bin/tutor4.py?user=Joe+Blow&age=30
=用于连接 key 和 value，&用于连接多个成分，+ 解释为空格


tutor5.py 非常好，集大成

#!/usr/bin/python
#######################################################
# runs on the server, reads form input, prints HTML
#######################################################

import cgi, sys
form = cgi.FieldStorage( )            # parse form data
print "Content-type: text/html"        # plus blank line

html = """
<TITLE>tutor5.py</TITLE>
<H1>Greetings</H1>
<HR>
<H4>Your name is %(name)s</H4>
<H4>You wear rather %(shoesize)s shoes</H4>
<H4>Your current job: %(job)s</H4>
<H4>You program in %(language)s</H4>
<H4>You also said:</H4>
<P>%(comment)s</P>
<HR>"""

data = {}
for field in ('name', 'shoesize', 'job', 'language', 'comment'):
    if not form.has_key(field):
        data[field] = '(unknown)'
    else:
        if type(form[field]) != list:
            data[field] = form[field].value
        else:
            values = [x.value for x in form[field]]
            data[field] = ' and '.join(values)
print html % data