Ajax, the latest very booming technology. There are a lot of ready-made development kits. At the beginning I tried the cpaint and supported php/asp. Not bad. It was later started with Perl Ajax: Cgi::ajax. By contrast, the discovery was very useful. The main feature is that the program automatically generates code that JavaScript invokes.
Cgi::ajax Installation
Perl-mcpan-e "Install Cgi::ajax"Learn about this simple example
#!/usr/bin/perl-w use strict; Use Cgi::ajax; Use CGI; #下面是我们这个程序的核心逻辑部分. #客户端通过会Ajax调用这个函数, get the results you want. Sub test_calculate{I ($cal 1, $cal 2) =@_ return ($cal 1+ $cal 2); #下面是客户端显示的html #注意onclick部分的写法. You can interpret it as a piece of pseudo code (in fact, it is not a pseudo code, its actual code is cgi::ajax automatically generated), said: #调用函数calculate, parameters are Val1 controls and val2 control values, the results are displayed on the result control. Sub show_html{My $html = <<EOHTML; <HTML> <HEAD> <title>test</title> </HEAD> < body> <input type= ' text ' name= ' val1 ' id= ' val1 ' > <input type= ' text ' name= ' val2 ' id= ' val2 ' > <input type= ' button ' Name= ' cal ' id= ' cal ' value= ' cal it ' ><br> <div id= ' result ' ></div> </BODY>A little problem
If you need to use a carriage return character or other similar characters in a page's JavaScript, you must use a 2 slash.
Questions about Chinese
I take UTF8 as an example.
1. page Character Set setting
Use the following calling method.
My @headers = ("Charset=utf8",); Print $ajax->build_html ($cgi, \&show_html,\ @headers);
2. Return result set Chinese display garbled
This is a small bug in Cgi::ajax.
The solution is as follows:
Find the ajax.pm you installed and find the following sentence:
My $rv = $self->cgi ()->header ();
Of course, the better way is to use our
Print $ajax->build_html ($cgi, \&show_html,\ @headers); This @headers, which is passed in, is also easy to change.
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