Embperl - building dynamic websites with Perl

• Embperl_Useenv
• use_redirect_env
• Embperl_Appname
• Embperl_App_Handler_Class
• Embperl_Session_Handler_Class
• Embperl_Session_Args
• Embperl_Session_Classes
• Embperl_Session_Config
• Embperl_Cookie_Name
• Embperl_Cookie_Domain
• Embperl_Cookie_Path
• Embperl_Cookie_Expires
• Embperl_Cookie_Secure
• Embperl_Log
• Embperl_Debug
• Embperl_Maildebug
• Embperl_Mailhost
• Embperl_Mailhelo
• Embperl_Mailfrom
• Embperl_Mail_Errors_To
• Embperl_Mail_Errors_Limit
• Embperl_Mail_Errors_Reset_Time
• Embperl_Mail_Errors_Resend_Time
• Embperl_Object_Base
• Embperl_Object_App
• Embperl_Object_Addpath
• Embperl_Object_Reqpath
• Embperl_Object_Stopdir
• Embperl_Object_Fallback
• Embperl_Object_Handler_Class
• Embperl_Useenv
• use_redirect_env
• Embperl_Allow
• Embperl_Urimatch
• Embperl_Multfieldsep
• Embperl_Path
• Embperl_Debug
• Embperl_Options
• Embperl_Output_Mode
• Embperl_Output_Esc_Charset
• Embperl_Session_Mode
• Embperl_Useenv
• use_redirect_env
• Embperl_Package
• Embperl_Debug
• Embperl_Options
• Embperl_Escmode
• Embperl_Input_Escmode
• Embperl_Input_Charset
• Embperl_Top_Include
• Embperl_Cache_Key
• Embperl_Cache_Key_Options
• Embperl_Expires_Func
• Embperl_Cache_Key_Func
• Embperl_Expires_In
• Embperl_Expires_Filename
• Embperl_Syntax
• Embperl_Recipe
• Embperl_Xsltstylesheet
• Embperl_Xsltproc

Configuration can be setup in different ways, depending how you run Embperl. When you run under mod_perl, Embperl add a set of new configuration directives to the Apache configuration, so you can set them in your httpd.conf. When you run Embperl as CGI it takes the configuration from environment variables. For compatibility reason that can also be turned on under mod_perl, by adding Embperl_UseEnv on in your httpd.conf. When you call Embperl from another Perl program, by calling the Execute function, you can pass your configuration along with other parameters as a hash reference. If you pass use_env =< 1 als parameter Embperl will also scan the environment for configuration information. Last but not least you can pass configuration information as options when you run Embperl via embpexec.pl from the command line. Some of the configuration options are also setable inside the page via the Empberl objects and you can read the current configuration from these objects.

You can not only pass configuration in different ways, there are also three different contexts: Application, Request and Component. A application describes a set of pages/files that belongs together and form the application. Application level configuration are the same for all files that belongs to an application. These configuration information need to be known before any request processing takes place, so they can't be modified during a request. Every application has it's own name. You can refer the configuration of an application, by simply setting the name of the application to use.

Request level configuration information applies to one request, some of them must be known before the request starts, some of them can still be modified during the request.

Configuration for components can be setup before the request, but can also be passed as argument when you call the component via Execute.

	Env:
	EMBPERL_USEENV
	Method:
	$application -> config -> use_env [read only]
	Default:
	off unless running as CGI script
	Since:
	2.0b6

Tells Embperl to scan the enviromemt for configuration settings.

	Method:
	$application -> config -> use_redirect_env [read only]
	Default:
	off unless running as CGI script
	Since:
	2.0b6

Tells Embperl to scan the enviromemt for configuration settings which has the prefix REDIRECT_. This is normally the case when the request is not the main request, but a subrequest.

	Env:
	EMBPERL_APPNAME
	Method:
	$application -> config -> app_name [read only]
	Since:
	2.0b6

Specifies the name for an application. The name is basically used to refer to this application elsewhere in httpd.conf without the need to setup the parameters for the apllication again.

	Env:
	EMBPERL_APP_HANDLER_CLASS
	Method:
	$application -> config -> app_handler_class [read only]
	Since:
	2.0b6

Embperl will call the init method of the given class at the start of the request, but after all request parameters are setup. This give the class a chance to do any necessary computation and modify the request parameters, before the request is actualy executed. See internationalization for an example.

	Env:
	EMBPERL_SESSION_HANDLER_CLASS
	Method:
	$application -> config -> session_handler_class [read only]
	Default:
	Apache::SessionX
	Since:
	1.3b3
	See also:
	Session Handling

Set the class that performs the Embperl session handling. This gives you the possibility to implement your own session handling.

NOTE: Default until 1.3.3 was HTML::Embperl::Session, starting with 1.3.4 it is Apache::SessionX. To get the old session behaviour set it to HTML::Embperl::Session.

	Env:
	EMBPERL_SESSION_ARGS
	Method:
	$application -> config -> session_args [read only]
	Since:
	1.3b3
	See also:
	Session Handling

List of arguments for Apache::Session classes Arguments that contains spaces can be quoted. Example:

  EMBPERL_SESSION_ARGS "DataSource=dbi:mysql:session UserName=www 'Password=secret word'"

	Env:
	EMBPERL_SESSION_CLASSES
	Method:
	$application -> config -> session_classes [read only]
	Since:
	1.3b3
	See also:
	Session Handling

Space separated list of object store and lock manager (and optionally the serialization and id generating class) for Apache::Session (see Session handling)

	Env:
	EMBPERL_SESSION_CONFIG
	Method:
	$application -> config -> session_config [read only]
	Default:
	given when running Makefile.PL of Apache::SessionX
	Since:
	1.3.3
	See also:
	Session Handling

Selects a session configuration from the configurations you have defined when running Apache::SessionX's Makefile.PL.

NOTE: Use either EMBPERL_SESSION_CONFIG or EMBPERL_SESSION_ARGS and EMBPERL_SESSION_CLASSES

	Env:
	EMBPERL_COOKIE_NAME
	Method:
	$application -> config -> cookie_name [read only]
	Default:
	EMBPERL_UID
	Since:
	1.2b4
	See also:
	Session Handling

Set the name that Embperl uses when it sends the cookie with the session id.

	Env:
	EMBPERL_COOKIE_DOMAIN
	Method:
	$application -> config -> cookie_domain [read only]
	Default:
	none
	Since:
	1.2b4
	See also:
	Session Handling

Set the domain that Embperl uses for the cookie with the session id.

	Env:
	EMBPERL_COOKIE_PATH
	Method:
	$application -> config -> cookie_path [read only]
	Default:
	none
	Since:
	1.2b4
	See also:
	Session Handling

Set the path that Embperl uses for the cookie with the session id.

	Env:
	EMBPERL_COOKIE_EXPIRES
	Method:
	$application -> config -> cookie_expires [read only]
	Default:
	at the end of the session
	Since:
	1.3b5
	See also:
	Session Handling

Set the expiration date that Embperl uses for the cookie with the session id. You can specify the full date or relativ values. The following forms are all valid times:

        +30s                              30 seconds from now
        +10m                              ten minutes from now
        +1h                               one hour from now
        -1d                               yesterday (i.e. "ASAP!")
        now                               immediately
        +3M                               in three months
        +10y                              in ten years time
        Thu, 25-Apr-1999 00:40:33 GMT     at the indicated time & date

	Env:
	EMBPERL_COOKIE_SECURE
	Method:
	$application -> config -> cookie_secure [read only]
	Default:
	at the end of the session
	Since:
	2.0b9
	See also:
	Session Handling

Set the secure flag of cookie that Embperl uses for the session id. If set the cookie will only be transferred over a secured connection.

	Env:
	EMBPERL_LOG
	Method:
	$application -> config -> log [read only]
	Default:
	Unix: /tmp/embperl.log Windows: /embperl.log

Gives the location of the log file. This will contain information about what Embperl is doing. The amount of information depends on the debug settings (see EMBPERL_DEBUG below). The log output is intended to show what your embedded Perl code is doing and to help debug it.

	Env:
	EMBPERL_DEBUG
	Method:
	$application -> config -> debug

This is a bitmask which specifies what should be written to the log. To specify multiple debugflags, simply add the values together. You can give the value a decimal, octal (prefix 0) or hexadecimal (prefix 0x) value. You can also use the constants defined in Embperl::Constant. The following values are defined:

	dbgStd = 1 (0x1)
	Show minimum information.
	dbgMem = 2 (0x2)
	Show memory and scalar value allocation.
	dbgEval = 4 (0x4)
	Show arguments to and results of evals.
	dbgEnv = 16 (0x10)
	List every request's environment variables.
	dbgForm = 32 (0x20)
	List posted form data.
	dbgInput = 128 (0x80)
	Show processing of HTML input tags.
	dbgFlushOutput = 256 (0x100)
	Flush Embperl's output after every write. This should only be set to help debug Embperl crashes, as it drastically slows down Embperl's operation.
	dbgFlushLog = 512 (0x200)
	Flush Embperl's logfile output after every write. This should only be set to help debug Embperl crashes, as it drastically slows down Embperl's operation.
	dbgLogLink = 8192 (0x2000)
	This feature is not yet implemented in Embperl 2.0! Inserts a link at the top of each page which can be used to view the log for the current HTML file. See also EMBPERL_VIRTLOG. Example: EMBPERL_DEBUG 10477 EMBPERL_VIRTLOG /embperl/log.htm <Location /embperl/log.htm> SetHandler perl-script PerlHandler Embperl Options ExecCGI </Location>
	dbgDefEval = 16384 (0x4000)
	Shows every time new Perl code is compiled.
	dbgHeadersIn = 262144 (0x40000)
	Log all HTTP headers which are sent from and to the browser.
	dbgShowCleanup = 524288 (0x80000)
	Show every variable which is undef'd at the end of the request. For scalar variables, the value before undef'ing is logged.
	dbgSession = 2097152 (0x200000)
	Enables logging of session transactions.
	dbgImport = 4194304 (0x400000)
	Show how subroutines are imported in other namespaces.
	dbgOutput = 0x08000
	Logs the process of converting the internal tree strcuture to plain text for output
	dbgDOM = 0x10000
	Logs things related to processing the internal tree data structure of documents
	dbgRun = 0x20000
	Logs things related to execution of a document
	dbgBuildToken = 0x800000
	Logs things related to creating the token tables for source parsing
	dbgParse = 0x1000000
	Logs the parseing of the source
	dbgObjectSearch = 0x2000000
	Shows how Embperl::Objects searches sourcefiles
	dbgCache = 0x4000000
	Logs cache related things
	dbgCompile = 0x8000000
	Gives information about compiling the parsed source to Perl code
	dbgXML = 0x10000000
	Logs things related to XML processing
	dbgXSLT = 0x20000000
	Logs things related to XSLT processing
	dbgCheckpoint = 0x40000000
	Logs things related to checkpoints which are internaly used during execution. This information is only useful if you have a deep knowledge of Embperl internals.

	Env:
	EMBPERL_MAILDEBUG
	Method:
	$application -> config -> maildebug
	Since:
	1.2.1

Debug value pass to Net::SMTP.

	Env:
	EMBPERL_MAILHOST
	Method:
	$application -> config -> mailhost
	Default:
	localhost

Specifies which host the mail related functions of Embperl uses as SMTP server.

	Env:
	EMBPERL_MAILHELO
	Method:
	$application -> config -> mailhelo
	Default:
	chosen by Net::SMTP
	Since:
	1.3b4

Specifies which host/domain all mailrealted function uses in the HELO/EHLO command. A reasonable default is normally chosen by Net::SMTP, but depending on your installation it may necessary to set it manualy.

	Env:
	EMBPERL_MAILFROM
	Method:
	$application -> config -> mailfrom
	Default:
	www-server@<server_name>
	Since:
	1.2.1

Specifies the email address that is used as sender all mailrelted function.

	Env:
	EMBPERL_MAIL_ERRORS_TO
	Method:
	$application -> config -> mail_errors_to

If set all errors will be send to the email address given.

	Env:
	EMBPERL_MAIL_ERRORS_LIMIT
	Method:
	$application -> config -> mail_errors_limit [read only]
	Since:
	2.0b6

Do not mail more then <num> errors. Set to 0 for no limit.

	Env:
	EMBPERL_MAIL_ERRORS_RESET_TIME
	Method:
	$application -> config -> mail_errors_reset_time [read only]
	Since:
	2.0b6

Reset error counter if for <sec> seconds no error has occurred.

	Env:
	EMBPERL_MAIL_ERRORS_RESEND_TIME
	Method:
	$application -> config -> mail_errors_resend_time [read only]
	Since:
	2.0b6

Mail errors of <sec> seconds regardless of the error counter.

	Env:
	EMBPERL_OBJECT_BASE
	Method:
	$application -> config -> object_base [read only]
	Default:
	_base.epl
	Since:
	1.3b1

Name of the base page that Embperl::Objects searches for.

	Env:
	EMBPERL_OBJECT_APP
	Method:
	$application -> config -> object_app
	Since:
	2.0b6

Filename of the application object that Embperl::Object searches for. The file should contain the Perl code for the application object. There must be no package name given (as the package is set by Embperl::Object) inside the file, but the @ISA should point to Embperl::App. If set this file is searched through the same search path as any content file. After a successful load the init method is called with the Embperl request object as parameter. The init method can change the parameters inside the request object to influence the current request.

	Env:
	EMBPERL_OBJECT_ADDPATH
	Method:
	$application -> config -> object_addpath
	Since:
	1.3b1

Additional directories where Embperl::Object searches for pages.

This search through the searchpath is always performed if in a call to Execute no path for the file is given.

 
In F<httpd.conf> or as environment variable directories are
separated by C<;> (on Unix C<:> works also). The parameter for C<Execute> and
the application object method expects/returns an array reference.
This path is
B<always> appended to the searchpath.

	Env:
	EMBPERL_OBJECT_REQPATH
	Method:
	$application -> config -> object_reqpath
	Since:
	2.0b12

Additional directories where Embperl::Object searches for files for the initial request.

If a file is requested, but cannot be found at the given location, the directories given in the this path are additionally searched for the file. This applies only to the initial filename given to Embperl::Object and not to files called via Execute.

In httpd.conf or as environment variable directories are separated by ; (on Unix : works also). The parameter for Execute and the application object method expects/returns an array reference.

Example:

if you say

    Embperl_Object_Reqpath  /a:/b:/c

and you request

    /x/index.epl

it will try

    /x/index.epl
    /a/index.epl
    /b/index.epl
    /c/index.epl

and take the first one that is found.

	Env:
	EMBPERL_OBJECT_STOPDIR
	Method:
	$application -> config -> object_stopdir
	Since:
	1.3b1

Directory where Embperl::Object stops searching for the base page.

	Env:
	EMBPERL_OBJECT_FALLBACK
	Method:
	$application -> config -> object_fallback
	Since:
	1.3b1

If the requested file is not found by Embperl::Object, the file given by EMBPERL_OBJECT_FALLBACK is displayed instead. If EMBPERL_OBJECT_FALLBACK isn't set a staus 404, NOT_FOUND is returned as usual. If the fileame given in EMBPERL_OBJECT_FALLBACK doesn't contain a path, it is searched thru the same directories as EMBPERL_OBJECT_BASE.

	Env:
	EMBPERL_OBJECT_HANDLER_CLASS
	Method:
	$application -> config -> object_handler_class
	Since:
	1.3b1

If you specify this, the template base and the requested page inherit all methods from this class. This class must contain Embperl::Req in his @ISA array.

	Env:
	EMBPERL_USEENV
	Method:
	$request -> config -> use_env [read only]
	Default:
	off unless running as CGI script
	Since:
	2.0b6

Tells Embperl to scan the enviromemt for configuration settings.

	Method:
	$request -> config -> use_redirect_env [read only]
	Default:
	off unless running as CGI script
	Since:
	2.0b6

Tells Embperl to scan the enviromemt for configuration settings which has the prefix REDIRECT_. This is normally the case when the request is not the main request, but a subrequest.

	Env:
	EMBPERL_ALLOW
	Method:
	$request -> config -> allow [read only]
	Default:
	no restrictions
	Since:
	1.2b10

If specified, only files which match the given perl regular expression will be processed by Embperl. All other files will return FORBIDDEN. This is especially useful in a CGI environment by making the server more secure.

	Env:
	EMBPERL_URIMATCH
	Method:
	$request -> config -> urimatch [read only]
	Default:
	process all files
	Since:
	2.0b6

If specified, only files which match the given perl regular expression will be processed by Embperl, all other files will be handled by the standard Apache handler. This can be useful if you have Embperl documents and non Embperl documents (e.g. gifs) residing in the same directory.

 Example: 
 # Only files which end with .htm will processed by Embperl
 EMBPERL_URIMATCH \.htm$

	Env:
	EMBPERL_MULTFIELDSEP
	Method:
	$request -> config -> mult_field_sep [read only]
	Default:
	\t
	Since:
	2.0b6

Specifies the character that is used to separate multiple form values with the same name.

	Env:
	EMBPERL_PATH
	Method:
	$request -> config -> path [read only]
	Since:
	1.3b6

Can contain a semicolon (also colon under Unix) separated file search path. When a file is processed and the filename isn't an absolute path or does not start with ./ (or .\ under windows), Embperl searches all the specified directories for that file.

A special handling is done if the filename starts with any number of ../ i.e. refers to an upper directory. Then Embperl strips the same number of entries at the start of the searchpath as the filename contains ../. Execute and the method of the request object expects/returns a array ref.

	Env:
	EMBPERL_DEBUG
	Method:
	$request -> config -> debug

See application configuration for an describtion of possible values

	Env:
	EMBPERL_OPTIONS
	Method:
	$request -> config -> options

This bitmask specifies some options for the execution of Embperl. To specify multiple options, simply add the values together.

	optDisableVarCleanup = 1
	Disables the automatic cleanup of variables at the end of each request.
	optDisableEmbperlErrorPage = 2
	Tells Embperl not to send its own errorpage in case of failure, but instead show as much of the page as possible. Errors are only logged to the log file. Without this option, Embperl sends its own error page, showing all the errors which have occurred. If you have dbgLogLink enabled, every error will be a link to the corresponding location in the log file. This option has no effect if optReturnError is set.
	optReturnError = 262144
	With this option set, Embperl sends no output in case of an error. It returns the error back to Apache or the calling program. When running under mod_perl this gives you the chance to use the Apache ErrorDocument directive to show a custom error-document. Inside the ErrorDocument you can retrieve the error messages with $errors = $req_rec -> prev -> pnotes('EMBPERL_ERRORS') ; where $errors is a array reference. (1.3b5+)
	optShowBacktrace = 0x8000000
	When set every error message not only show the sourcefiles, but all files from which this file was called by Execute.

	Env:
	EMBPERL_OUTPUT_MODE
	Method:
	$request -> config -> output_mode
	Default:
	HTML
	Since:
	2.0b9

Set the desired output format. 0 for HTML and 1 XML. If set to XML all tags that are generated by Embperl will contain a closing slash to conform to XML specs. e.g.

    <input type="text" name="foo" />

NOTE: If you set output_mode to XML you should also change escmode to XML escaping.

	Env:
	EMBPERL_OUTPUT_ESC_CHARSET
	Method:
	$request -> config -> output_esc_charset [read only]
	Default:
	ocharsetLatin1 = 1
	Since:
	2.0.2

Set the charset which to assume when escaping. This can only be set before the request starts (e.g. httpd.conf or top of the page). Setting it inside the page has undefined results.

	ocharsetUtf8 = 0
	UTF-8 or any non known charset. Characters with codes above 128 will not be escaped at all
	ocharsetLatin1 = 1
	ISO-8859-1, the default. When a Perl string has it's utf-8 bit set, this mode will behave the same as mode 0, i.e. will not escape anything above 128.
	ocharsetLatin2 = 2
	ISO-8859-2. When a Perl string has it's utf-8 bit set, this mode will behave the same as mode 0, i.e. will not escape anything above 128.

	Env:
	EMBPERL_SESSION_MODE
	Method:
	$request -> config -> session_mode [read only]
	Default:
	smodeUDatCookie = 1
	Since:
	2.0b6

Specifies how the id for the session data is passed between requests. Possible values are:

	smodeNone = 0
	No session id will be passed
	smodeUDatCookie = 1
	The session id for the user session will be passed via cookie
	smodeUDatParam = 2
	The session id for the user session will append as parameter to any URL and inserted as a hidden field in any form.
	smodeUDatUrl = 4
	The session id for the user session will passed as a part of the URL. NOT YET IMPLEMENTED!!
	smodeSDatParam = 0x20
	The session id for the state session will append as parameter to any URL and inserted as a hidden field in any form.

You may add the UDat and SDat values together to get both sorts of sessions, for example the value 0x21 will pass the id for the user session inside a cookie and the id for the state session as parameters.

	Env:
	EMBPERL_USEENV
	Method:
	$component -> config -> use_env [read only]
	Default:
	off unless running as CGI script
	Since:
	2.0b6

Tells Embperl to scan the enviromemt for configuration settings.

	Method:
	$component -> config -> use_redirect_env [read only]
	Default:
	off unless running as CGI script
	Since:
	2.0b6

Tells Embperl to scan the enviromemt for configuration settings which has the prefix REDIRECT_. This is normally the case when the request is not the main request, but a subrequest.

	Env:
	EMBPERL_PACKAGE
	Method:
	$component -> config -> package

The name of the package where your code will be executed. By default, Embperl generates a unique package name for every file. This ensures that variables and functions from one file do not conflict with those of another file. (Any package's variables will still be accessible with explicit package names.)

	Env:
	EMBPERL_DEBUG
	Method:
	$component -> config -> debug

See application configuration for an describtion of possible values

	Env:
	EMBPERL_OPTIONS
	Method:
	$component -> config -> options

This bitmask specifies some options for the execution of Embperl. To specify multiple options, simply add the values together.

	optDisableVarCleanup = 1
	Disables the automatic cleanup of variables at the end of each request.
	optDisableEmbperlErrorPage = 2
	Tells Embperl not to send its own errorpage in case of failure, but instead show as much of the page as possible. Errors are only logged to the log file. Without this option, Embperl sends its own error page, showing all the errors which have occurred. If you have dbgLogLink enabled, every error will be a link to the corresponding location in the log file. This option has no effect if optReturnError is set.
	optReturnError = 262144
	With this option set, Embperl sends no output in case of an error. It returns the error back to Apache or the calling program. When running under mod_perl this gives you the chance to use the Apache ErrorDocument directive to show a custom error-document. Inside the ErrorDocument you can retrieve the error messages with $errors = $req_rec -> prev -> pnotes('EMBPERL_ERRORS') ; where $errors is a array reference. (1.3b5+)
	optShowBacktrace = 0x8000000
	When set every error message not only show the sourcefiles, but all files from which this file was called by Execute.
	optSafeNamespace = 4
	Tells Embperl to execute the embedded code in a safe namespace so the code cannot access data or code in any other package. (See the chapter about (Safe-)Namespaces and opcode restrictions below for more details.)
	optOpcodeMask = 8
	Tells Embperl to apply an operator mask. This gives you the chance to disallow special (unsafe) opcodes. (See the Chapter about (Safe-)Namespaces and opcode restrictions below for more details.)
	optDisableFormData = 256
	This option disables the setup of %fdat and @Z<>ffld. Embperl will not do anything with the posted form data. Set this when using Execute from your perl script and you have already read the Form Data (via eg. CGI.pm).
	optFormDataNoUtf8 = 0x2000000
	By default Embperl checks all formfields in %fdat if they contain valid UTF-8 strings and if yes sets Perl's internals UTF-8 flag. If this option is set Embperl will never set the UTF-8 on any data in %fdat.
	optAllFormData = 8192
	This option will cause Embperl to insert all formfields in %fdat and @Z<>ffld, even if they are empty. Empty formfields will be inserted with an empty string. Without this option, empty formfields will be absent from %fdat and @Z<>ffld.
	optRedirectStdout = 16384
	Redirects STDOUT to the Embperl output stream before every request and resets it afterwards. If set, you can use a normal Perl print inside any Perl block to output data. Without this option you can only use output data by using the [+ ... +] block, or printing to the filehandle OUT.
	optNoHiddenEmptyValue = 65536 (only 1.2b2 and above)
	Normally, if there is a value defined in %fdat for a specific input field, Embperl will output a hidden input element for it when you use hidden. When this option is set, Embperl will not output a hidden input element for this field when the value is a blank string.
	optKeepSpaces = 1048576 (only 1.2b5 and above) = 0x100000,
	Disable the removal of spaces and empty lines from the output. This is useful for sources other than HTML.
	optChdirToSource = 0x10000000 (only 2.5 and above)
	Change current working directory to the directory of the sourcefile, before executing the source.

	Env:
	EMBPERL_ESCMODE
	Method:
	$component -> config -> escmode
	Default:
	7

Turn HTML and URL escaping on and off.

NOTE: If you want to output binary data, you must set the escmode to zero.

For convenience you can change the escmode inside a page by setting the variable $escmode.

	escXML = 8 (or 15) (2.0b4 and above)
	The result of a Perl expression is always XML-escaped (e.g., `>' becomes `>' and ' become ').
	escUrl + escHtml = 3 (or 7)
	The result of a Perl expression is HTML-escaped (e.g., `>' becomes `>') in normal text and URL-escaped (e.g., `&' becomes `%26') within of A, EMBED, IMG, IFRAME, FRAME and LAYER tags.
	escUrl = 2 (or 6)
	The result of a Perl expression is always URL-escaped (e.g., `&' becomes `%26').
	escHtml = 1 (or 5)
	The result of a Perl expression is always HTML-escaped (e.g., `>' becomes `>').
	escNode = 0
	No escaping takes place.
	escEscape = 4
	If you add this value to the above Embperl will always perform the escaping. Without it is possible to disable escaping by preceding the item that normally is escaped with a backslash. While this is a handy thing, it could be very dangerous in situations, where content that is inserted by some user is redisplayed, because they can enter arbitrary HTML and precede them with a backslash to avoid correct escaping when their input is redisplayed again.

NOTE: You can localize $escmode inside a [+ +] block, e.g. to turn escaping temporary off and output $data write

    [+ do { local $escmode = 0 ; $data } +]

	Env:
	EMBPERL_INPUT_ESCMODE
	Method:
	$component -> config -> input_escmode [read only]
	Default:
	0
	Since:
	2.0b6

Tells Embperl how to handle escape sequences that are found in the source.

	0
	don't interpret input (default)
	1
	unescape html escapes to their characters (i.e. &lt; becomes < ) inside of Perl code
	2
	unescape url escapes to their characters (i.e. %26; becomes & ) inside of Perl code
	3
	unescape html and url escapes, depending on the context

Add 4 to remove html tags inside of Perl code. This is helpful when an html editor insert html tags like <br> inside your Perl code.

Set EMBPERL_INPUT_ESCMODE to 7 to get the old default of Embperl < 2.0b6

Set EMBPERL_INPUT_ESCMODE to 0 to get the old behaviour when optRawInput was set.

	Env:
	EMBPERL_INPUT_CHARSET
	Method:
	$component -> config -> input_charset

If set to the value "utf8" the source is interpreted as utf8 encoded so you can use utf8 literals. It has the same effect as adding "use utf8" to a normal Perl script.

	Env:
	EMBPERL_TOP_INCLUDE
	Method:
	$component -> config -> top_include
	Since:
	2.0b10

Give a pieces of code that is include at the very top of every file.

Example:

    Embperl_Top_Include "use MY::Module;"

This will cause MY::Module to be used in every page. Note that Embperl_Top_Include must contain valid Perl code and must be ended with a semicolon.

NOTE: If you pass top_include as parameter to Execute it is only used in case the code is compiled (or recompiled) and not cached.

	Env:
	EMBPERL_CACHE_KEY
	Method:
	$component -> config -> cache_key [read only]
	Since:
	2.0b1

literal string that is appended to the cache key

	Env:
	EMBPERL_CACHE_KEY_OPTIONS
	Method:
	$component -> config -> cache_key_options [read only]
	Default:
	all options set
	Since:
	2.0b1

Tells Embperl how to create a key for caching of the output

	ckoptPathInfo = 2
	include the PathInfo into CacheKey
	ckoptQueryInfo = 4
	include the QueryInfo into CacheKey
	ckoptDontCachePost = 8
	don't cache POST requests (not yet implemented)

	Env:
	EMBPERL_EXPIRES_FUNC
	Method:
	$component -> config -> expires_func [read only]
	Since:
	2.0b1

Function that is called every time before data is taken from the cache. If this function returns true, the data from the cache isn't used anymore, but rebuilt.

Function could be either a coderef (when passed to Execute), a name of a subroutine or a string starting with "sub " in which case it is compiled as anonymous subroutine.

NOTE: If &EXPIRES is defined inside the page, it get evaluated before the excecution of the page

	Env:
	EMBPERL_CACHE_KEY_FUNC
	Method:
	$component -> config -> cache_key_func
	Since:
	2.0b1

function that should be called when build a cache key. The result is appended to the cache key.

	Env:
	EMBPERL_EXPIRES_IN
	Method:
	$component -> config -> expires_in [read only]
	Since:
	2.0b1

Time in seconds that the output should be cached. (0 = never, -1 = forever)

NOTE: If $EXPIRES is set inside the page, it get evaluated before the excecution of the page

	Env:
	EMBPERL_EXPIRES_FILENAME
	Method:
	$component -> config -> expires_filename [read only]
	Since:
	2.0b8

Cache should be expired when the given file is modified.

	Env:
	EMBPERL_SYNTAX
	Method:
	$component -> config -> syntax
	Default:
	Embperl
	Since:
	2.0b1

Used to tell Embperl which syntax to use inside a page. Embperl comes with the following syntaxes:

	EmbperlHTML
	all the HTML tags that Embperl recognizes by default
	EmbperlBlocks
	all the [ ] blocks that Embperl supports
	Embperl
	(default; contains EmbperlHtml and EmbperlBlocks)
	ASP
	<% %> and <%= %>, see perldoc Embperl::Syntax::ASP
	SSI
	Server Side Includes, see perldoc Embperl::Syntax::SSI
	Perl
	File contains pure Perl (similar to Apache::Registry), but can be used inside EmbperlObject
	Text
	File contains only Text, no actions are taken on the Text
	Mail
	Defines the <mail:send> tag, for sending mail. This is an example for a taglib, which could be a base for writing your own taglib to extent the number of available tags
	POD
	translates pod files to XML, which can be converted to the desired output format by an XSLT transformation
	RTF
	Can be used to process word processing documents in RTF format

You can get a description for each syntax if you type

    perldoc Embperl::Syntax::xxx

where 'xxx' is the name of the syntax.

You can also specify multiple syntaxes e.g.

    EMBPERL_SYNTAX "Embperl SSI"

    Execute ({inputfile => '*', syntax => 'Embperl ASP'}) ;

The 'syntax' metacommand allows you to switch the syntax or to add or subtract syntaxes e.g.

    [$ syntax + Mail $]

will add the Mail taglib so the <mail:send> tag is available after this line.

    [$ syntax - Mail $]

now the <mail:send> tag is unknown again

    [$ syntax SSI $]

now you can only use SSI commands inside your page.

	Env:
	EMBPERL_RECIPE
	Method:
	$component -> config -> recipe [read only]
	Since:
	2.0b4

Tells Embperl which recipe to use to process this component

	Env:
	EMBPERL_XSLTSTYLESHEET
	Method:
	$component -> config -> xsltstylesheet [read only]
	Since:
	2.0b5

Tell the xslt processor which stylsheet to use.

	Env:
	EMBPERL_XSLTPROC
	Method:
	$component -> config -> xsltproc [read only]
	Default:
	depends on compiltime options
	Since:
	2.0b5

Tells Embperl which xslt processor to use. Current libxslt and xalan are supported by Embperl, but they must be compiled in to be available.