Tài liệu Embedding Perl in HTML with Mason Chapter 2: Components- P2 doc

... concerning the currently executing chain of components. It is treated in detail in Chapter 4 . Return. 4. Component objects are returned by several of the HTML: :Mason: :Request and HTML: :Mason: :Interp ... these issues are covered in Chapter 3 , Chapter 5, and Chapter 12 . Return. 2. The percent sign (%) must occur at the beginning of the line. Return . 3. The HTML: :Ma...

Ngày tải lên: 14/12/2013, 12:15

... for the HTML: :Mason: :Interp module in a recent release of Mason for details. Embedded Perl: % Lines and < %perl& gt; Blocks There are two ways to embed Perl code into text with Mason. The ... few lines of Perl code in a row, however, it is probably best to use a Perl block instead. A Perl block is equivalent to a bunch of Perl lines in a row. It begins with t...

Ngày tải lên: 14/12/2013, 12:15

... Available Only When Using ApacheHandler When you are using Mason under mod _perl with the HTML: :Mason: :ApacheHandler class, which is covered in Chapter 7 , the Request object will contain several additional ... when using the HTML: :Mason: :ApacheHandler or HTML: :Mason: :CGIHandler classes. The latter class is covered in Chapter 9 . • cgi_object This method is always...

Ngày tải lên: 14/12/2013, 12:15

... syntax in Chapter 2 , but two basic elements in the preceding example deserve mention here. The first is that any line that begins with a % character tells Mason that the line contains Perl ... language's) built -in object-oriented inheritance. Return . #!/usr/bin /perl use strict; use HTML: :Mason; my $interp = HTML: :Mason: :Interp->new( ); my $comp =...

Ngày tải lên: 14/12/2013, 12:15

... often no filtering is necessary. Inspecting the Wrapping Chain When Mason processes a request, it builds the wrapping chain and then executes each component in the chain, starting with the topmost ... processing, though, because parsing HTML can give you a stomach ache very quickly. In Chapter 5 you'll see how to use inheritance to gain finer control over the productio...

Ngày tải lên: 14/12/2013, 12:15

... rather than optimize your code at the expense of increasing its complexity, thus making it less maintainable. Caching can also be a big win in providing scalability when you have a bottleneck like ... produce an error message with no trace, a multiline error with trace information, a single-line error with tab-separated fields (suitable for writing to a log), and a fancy HTML...

Ngày tải lên: 14/12/2013, 12:15

... autohandler example using attributes instead of methods. Example 5-7. autohandler < ;html& gt; main component and any of its subcomponents, including the main component's <%init> section, ... Mason directive that defines one component from within another. The component embedded within the <%def> block is called a subcomponent , and it is visible only to the compon...

Ngày tải lên: 14/12/2013, 12:15

... it occurs in a component located in the mine or shared component root will look for the indicated component, first in mine, then in shared if none is found in mine. An Advanced Inheritance ... In Chapter 3 we introduced you to the concept of component inheritance, and in this chapter we have discussed some of the ways you can use inheritance to create flexible, mainta...

Ngày tải lên: 14/12/2013, 12:15

... actually processing the component source code and finding the Mason directives within it. It interacts quite closely with the Compiler, which takes the Lexer's output and generates a Mason component ... functionality. In an informal sense, we speak of Release 1.10 as having made Mason more "pluggable." By default, Mason creates a Lexer object in the HTML: :Ma...

Ngày tải lên: 14/12/2013, 12:15

... assume a document root of /home/httpd/htdocs . If you request the document /index .html via your web browser, Apache will look for the file /home/httpd/htdocs/index .html . If index .html contains ... <Location /mason& gt; PerlSetVar MasonCompRoot /path/to /doc/ root /mason SetHandler perl- script PerlHandler HTML: :Mason: :ApacheHandler </Location> Eventually you...

Ngày tải lên: 14/12/2013, 12:15