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: :Mason: :Request object provides ... or the Perl interpreter running Mason shuts down, whichever comes first. The <%once> section is useful for things like creating database handles or instantiating large, resource-intensive...

Tài liệu Embedding Perl in HTML with Mason Chapter 2: Components- P1 pptx

... 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 the start tag < %perl& gt; ... components contains a simple tag to do in- place substitution of Perl expressions, a way to mark a single line as being a line of Perl, and a set of block tags, most of which contain Perl code that...

Tài liệu Embedding Perl in HTML with Mason Chapter 4: APIs- P2 docx

... 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 available when using HTML: :Mason: :CGIHandler ... handle incoming parameters by setting args_method to mod _perl, this object will be an Apache::Request object; otherwise, it will be an Apache object. Incoming parameter handling is covered in Chapter...

Tài liệu Embedding Perl in HTML with Mason Chapter 1: Introduction pdf

... 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 = $interp->make_component(comp_source ... contains HTML but is designed to work with any kind of text in the template (in truth, HTML: :Template can work with arbitrary text, too, but it was designed specifically to work with HTML) ....

Tài liệu Embedding Perl in HTML with Mason Chapter 3: Special Components: Dhandlers and Autohandlers pdf

... 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 production of the HTML in ... /docs/component.mas, /docs/dhandler, and /dhandler, /docs/component.mas may decline the request by calling $m->decline, which passes control to /docs/dhandler. If /docs/dhandler calls $m->decline,...

Tài liệu Embedding Perl in HTML with Mason Chapter 4: APIs- P1 pptx

... 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 format. Each of ... discussed in Chapter 3. • call_next(arguments) When the currently executing component is part of a wrapping chain, this method will call the next component in the chain, passing it the...

Tài liệu Embedding Perl in HTML with Mason Chapter 5: Advanced Features-P1 doc

... 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 component within ... request. Now imagine another scenario, one in which the method needs to examine the incoming arguments in order to generate its output. For instance, suppose you request /view_user .html? id=2982,...

Tài liệu Embedding Perl in HTML with Mason Chapter 5: Advanced Features-P2 pdf

... 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, maintainable Mason ... $m->content instead of in the $_ variable. The $m->content() method or, in an Apache configuration file: PerlSetVar MasonCompRoot 'main => /usr/http/docs' PerlAddVar MasonCompRoot...

Tài liệu Embedding Perl in HTML with Mason Chapter 6: The Lexer, Compiler, Resolver, and Interpreter Objects doc

... 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: :Mason: :Lexer class. By passing a ... 6-1. The Interpreter and its cronies Passing Parameters to Mason Classes An interesting feature of the Mason code is that, if a particular object contains another object, the containing object...

Tài liệu Embedding Perl in HTML with Mason Chapter 7: Using Mason with mod_perl pptx

... 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 may want to have Mason ... hello-kitty-heaven.example.com DocumentRoot /home/hello-kitty/htdocs/ PerlSetVar MasonCompRoot /home/hello-kitty/htdocs /mason PerlSetVar MasonDataDir /home/hello-kitty /mason- data <LocationMatch "\.mhtml$">...

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