Python CGI编写web程序-加法器
CGI是运行在服务器上的程序，提供客户端HTML页面的接口，它的全称是Common Gateway Interface (通用网关接口)缺点及改进：
每次的CGI请求都要生成程序的副本来运行
FastCGI-先编译
mod_perl-将解释器作为模块集成在web服务器中
使用C等编译语言
模板引擎jkxy.py
form_type="GET"和form_type="POST"对应于get和post请求
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
def start_response(resp="text/html"):
return 'Content-type: '+resp+ '\n\n'
def start_form(the_url="",form_type="GET"):
return '<form action="'+the_url+'"method="'+form_type+'">'
def end_form(submit_msg="Submit"):
return '<p></p><input type="submit" value="' +submit_msg+'">'
def input_label(name,placeholder="",value="",readonly=None):
if readonly is None:
return '<input type="text" value="'+value+'" name="'+name+'" placeholder="'+placeholder+'">'
else:
return '<input type="text" value="'+value+'" readonly="'+readonly+'" name="'+name+'" placeholder="'+placeholder+'">'
def context(word):
return word
def start_div(align,style):
return '<div align="'+align+'"style="'+style+'">'
def end_div():
return "</div>"
def img(src):
return '<img src="'+src+'">'
main.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
#!/usr/bin/env python
# -*- coding: utf-8 -*-
import cgi, cgitb
from jkxy import *
form1 = cgi.FieldStorage() #声明请求参数的一个容器
num1=form1.getvalue("Num1")
num2=form1.getvalue("Num2")
num3=None
if not num1 is None and not num2 is None:
num1=int(num1)
num2=int(num2)
num3=num1+num2
print start_response()
print start_div("center","margin-top:40px;")
print img("../views/add.png")
print end_div()
print start_div("center","margin-top:60px;")
print start_form()
print input_label("Num1","adder-1")
print "+"
print input_label("Num2","adder-2")
print "="
if num3 is None:
print input_label("Num3","result","","readonly")
else:
print input_label("Num3","result",str(num3),"readonly")
print end_form()
print end_div()
使用以下命令启动web服务
python -m CGIHTTPServer 8081
页:
[1]