python手记(11)

<form method="POST" action="http://host.com/cgi-bin/test.py">
    <p>Your first name: <input type="text" name="firstname">
    <p>Your last name: <input type="text" name="lastname">
    <p>Click here to submit form: <input type="submit" value="Yeah!">
    <input type="hidden" name="session" value="1f9a2">
</form>

Python CGI programming

一个典型的cgi程序

#!/usr/local/bin/python
import cgi

def main():
    print "Content-type: text/html\n"
    form = cgi.FieldStorage()	# parse query
    if form.has_key("firstname") and form["firstname"].value != "":
        print "<h1>Hello", form["firstname"].value, "</h1>"
    else:
        print "<h1>Error! Please enter first name.</h1>"

main()

典型架构

form = cgi.FieldStorage()
if not form:
    ...display blank form...
elif ...valid form...:
    ...perform action, display results (or next form)...
else:
    ...display error message (maybe repeating form)...