Specifications

CHAPTER 18
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Debugging with the web-tier compiler
The web-tier compiler has the following debugging-related features:
• Detects a query string parameter that you use to invoke the debugger compiler
• Controls the number of lines in the output that occur before and after an error or warning
• Logs access and error messages
Invoking the debugger compiler
You can compile a debug version of your Flex application when you are using the web-tier compiler. You do this
by appending
?debug=true to the end of the query string; for example:
http://www.myhost.com/myApps/Main.mxml?debug=true
You cannot disable this behavior of the web-tier compiler.
Adding
?debug=true to your query string instructs the compiler to include debugging information in the final
SWF file output. As a result, you can set breakpoints and use other features of the fdb command-line debugger or
the Flex Builder visual debugger.
To debug the application, you launch the fdb command line debugger and then launch your application in the
browser with
?debug=true on the query string. The application connects to the running debugger.
You must have a debugger version of Flash Player to compile the application with debug information in it.
For more information on using fdb, see “Using the Command-Line Debugger” on page 245.
$(swf)
Defines the name of the MXML file, minus the extension. For example, if the MXML file is named Main.mxml,
the web-tier compiler inserts
Main where this token occurs.
This token is used by the movie parameter of the <object> tag and the src property of the <embed> tag.
$(width)
Defines the width of the application. The default value is 100%. You set the default value in the
compiler.conf file. If this value is set in the MXML file, then the web-tier compiler uses that value.
This token is used by the width properties of the <object> tag and <embed> tags.
Token Descri pt ion