## Package org.apache.catalina.ssi

This package contains code that is used by the SsiInvoker.

See:
Description

Interface Summary
SSICommand: The interface that all SSI commands ( SSIEcho, SSIInclude, ...) must implement.
SSIExternalResolver: Interface used by SSIMediator to talk to the 'outside world' ( usually a servlet )

Class Summary
ByteArrayServletOutputStream: Class that extends ServletOuputStream, used as a wrapper from within `SsiInclude`
ExpressionParseTree: Represents a parsed expression.
ExpressionTokenizer: Parses an expression string to return the individual tokens.
ResponseIncludeWrapper: A HttpServletResponseWrapper, used from `SSIServletExternalResolver`
SSIConditional: SSI command that handles all conditional directives.
SSIConfig: Implements the Server-side #exec command
SSIEcho: Return the result associated with the supplied Server Variable.
SSIExec: Implements the Server-side #exec command
SSIFlastmod: Implements the Server-side #flastmod command
SSIFsize: Implements the Server-side #fsize command
SSIInclude: Implements the Server-side #include command
SSIMediator: Allows the different SSICommand implementations to share data/talk to each other
SSIPrintenv: Implements the Server-side #printenv command
SSIProcessor: The entry point to SSI processing.
SSIServlet: Servlet to process SSI requests within a webpage.
SSIServletExternalResolver: An implementation of SSIExternalResolver that is used with servlets.
SSIServletRequestUtil
SSISet: Implements the Server-side #set command

Exception Summary
SSIStopProcessingException: Exception used to tell SSIProcessor that it should stop processing SSI commands.

## Package org.apache.catalina.ssi Description

This package contains code that is used by the SsiInvoker.

This class consists of `SsiMediator.java` which works as a mediator between the different SsiCommands. To add a command you have to implement the `SsiCommand` interface and extend the `SsiMediator`. Commands currently implemented are

- SsiConfig - Implementation of the NCSA command Config i.e. <!--#config errmsg="error?"-->
- SsiEcho - Implementation of the NCSA command Echo i.e. <!--#echo var="SERVER_NAME"-->
- SsiExec - Not implemented
- SsiFlastMod - Implementation of the NCSA command flastmod i.e. <!--#flastmod virtual="file"-->
- SsiFsize - Implementation of the NCSA command fsize i.e. <!--#fsize file="file"-->
- SsiInclude - Implementation of the NCSA command Include i.e. <!--#config virtual="includefile"-->

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