First you will need to download a copy of mod_tcl. Depending on where your distribution came from (cvs, .tgz, etc.) your directory will be named different. I will assume that the directory is named mod_tcl for the purpose of this installation procedure. You will also need a copy of autoconf which is available from any GNU distribution.

Next, place the mod_tcl directory into Apache's modules directory. For example if using Apache 2.0.14 this would be placed in httpd-2_0_14/modules/mod_tcl. Change directory to httpd-2_0_14 and run the command autoconf and then autoheader. You may now procedure with a make.

It is possible to compile mod_tcl as a shared object by passing arguments to the configuration script of Apache. Use the switch --enable-mods-shared=tcl to enable mod_tcl to be built as a shared object.

In summary the follow procedure was described above.

% tar -zxf mod_tcl.tar.gz
% mv mod_tcl httpd-2_0_16/modules/.
% cd httpd-2_0_16
% autoconf
% autoheader
% ./configure
% make

The configuration directives for mod_tcl should be configured inside of a <Directory> or <Location>. The <Tcl> fields should be declared outside of a <Directory> or <Location> because the <Tcl> directives add logic to the global namespace.

Determine if the module should be active
@param 1 On or Off
Tcl

Set an array variable or a scalar variable
@param 1 Array variable if param 3 is non-null, otherwise a scalar variable
@param 2 Name of an array element if param 3 is non-null, otherwise value to set scalar
@param 3 Value to set array element to
Tcl_Var

Append to a list
@param 1 List variable to append to
@param 2 Value to append
Tcl_ListVar

Add a content handler to be executed
@param 1 The name of a procedure that is to be called when a content handler is called
Tcl_ContentHandler

Add a post read request hook
@param 1 The name of a procedure that is to be called when a read request hook is called
Tcl_Hook_Post_Read_Request

Add a translate name hook
@param 1 The name of a procedure that is to be called when a translate name hook is called
Tcl_Hook_Translate_Name

Add a header parser hook
@param 1 The name of a procedure that is to be called when a header parser hook is called
Tcl_Hook_Header_Parser

Add an access checker hook
@param 1 The name of a procedure that is to be called when an access checker hook is called
Tcl_Hook_Access_Checker

Add a check user id hook
@param 1 The name of a procedure that is to be called when a check user id hook is called
Tcl_Hook_Check_User_ID

Add an auth checker hook
@param 1 The name of a procedure that is to be called when an auth checker hook is called
Tcl_Hook_Auth_Checker

Add a type checker hook
@param 1 The name of a procedure that is to be called when a type checker hook is called
Tcl_Hook_Type_Checker

Add a fixups hook
@param 1 The name of a procedure that is to be called when a fixups hook is called
Tcl_Hook_Fixups

Add a log transaction hook
@param 1 The name of a procedure that is to be called when a log transaction hook is called
Tcl_Hook_Log_Transaction

Add raw TCL to the interpeter
@param 1 A TCL script that will be executed in the interpreter
<Tcl>

End adding raw TCL to the interpreter
</Tcl>

Here is some preliminary documentation which really could be made prettier. Important things to note are, all the constants and commands are made available in the ::apache namespace. Therefore you must either import this namespace or use namespace scope operators to use the constants and commands.

Constants Provided
------------------

DECLINED
DONE
OK
	
M_POST
M_GET
M_PUT
M_DELETE
M_CONNECT
M_OPTIONS
M_TRACE
M_PATCH
M_PROPFIND
M_PROPPATCH
M_MKCOL
M_COPY
M_MOVE
M_LOCK
M_UNLOCK
M_INVALID
	
HTTP_CONTINUE
HTTP_SWITCHING_PROTOCOLS
HTTP_PROCESSING
HTTP_OK
HTTP_CREATED
HTTP_ACCEPTED
HTTP_NON_AUTHORITATIVE
HTTP_NO_CONTENT
HTTP_RESET_CONTENT
HTTP_PARTIAL_CONTENT
HTTP_MULTI_STATUS
HTTP_MULTIPLE_CHOICES
HTTP_MOVED_PERMANENTLY
HTTP_MOVED_TEMPORARILY
HTTP_SEE_OTHER
HTTP_NOT_MODIFIED
HTTP_USE_PROXY
HTTP_TEMPORARY_REDIRECT
HTTP_BAD_REQUEST
HTTP_UNAUTHORIZED
HTTP_PAYMENT_REQUIRED
HTTP_FORBIDDEN
HTTP_NOT_FOUND
HTTP_METHOD_NOT_ALLOWED
HTTP_NOT_ACCEPTABLE
HTTP_PROXY_AUTHENTICATION_REQUIRED
HTTP_REQUEST_TIME_OUT
HTTP_CONFLICT
HTTP_GONE
HTTP_LENGTH_REQUIRED
HTTP_PRECONDITION_FAILED
HTTP_REQUEST_ENTITY_TOO_LARGE
HTTP_REQUEST_URI_TOO_LARGE
HTTP_UNSUPPORTED_MEDIA_TYPE
HTTP_RANGE_NOT_SATISFIABLE
HTTP_EXPECTATION_FAILED
HTTP_UNPROCESSABLE_ENTITY
HTTP_LOCKED
HTTP_FAILED_DEPENDENCY
HTTP_INTERNAL_SERVER_ERROR
HTTP_NOT_IMPLEMENTED
HTTP_BAD_GATEWAY
HTTP_SERVICE_UNAVAILABLE
HTTP_GATEWAY_TIME_OUT
HTTP_VERSION_NOT_SUPPORTED
HTTP_VARIANT_ALSO_VARIES
HTTP_INSUFFICIENT_STORAGE
HTTP_NOT_EXTENDED
	
REMOTE_HOST
REMOTE_NAME
REMOTE_NOLOOKUP
REMOTE_DOUBLE_REV
	
APLOG_EMERG
APLOG_ALERT
APLOG_CRIT
APLOG_ERR
APLOG_WARNING
APLOG_NOTICE
APLOG_INFO
APLOG_DEBUG
APLOG_NOERRNO

REQUEST_NO_BODY
REQUEST_CHUNKED_ERROR
REQUEST_CHUNKED_DECHUNK

Commands
--------

Abort request
@param 1 A string with the reason of abortion
@deffunc abort 1
abort

Read posted data and set the array pram
@deffunc read_post
read_post

Generate a random integer
@return An integer
@deffunc random
random

Seed random number generation
@param 1 An integer to seed random number generation
@deffunc srandom 1
srandom

Encode data to base64
@param 1 Data to be encoded
@return Base64 string of converted data
@deffunc base64_encode 1
base64_encode

Decode data from base64
@param 1 Base64 string to be converted to data
@return Data that was converted from base64
@deffunc base64_decode
base64_decode

Call ap_allow_options
@return An integer with the mask of options
@deffunc ap_allow_options
ap_allow_options

Call ap_allow_overrides
@return An integer
@deffunc ap_allow_overrides
ap_allow_overrides

Call ap_default_type
@return A string
@deffunc ap_default_type
ap_default_type

Call ap_document_root
@return A string
@deffunc ap_document_root
ap_document_root

Call ap_get_remote_host
@param 1 An integer specifying the type of lookup
@return A string
@deffunc ap_get_remote_host 1
ap_get_remote_host

Call ap_get_remote_logname
@return A string
@deffunc ap_get_remote_logname
ap_get_remote_logname

Call ap_construct_url
@param 1 A uri
@return A string
@deffunc ap_construct_url 1
ap_construct_url

Call ap_get_server_name
@return A string
@deffunc ap_get_server_name
ap_get_server_name

Call ap_get_limit_req_body
@return An integer
@deffunc ap_get_limit_req_body
ap_get_limit_req_body

Call ap_get_limit_xml_body
@return An integer
@deffunc ap_get_limit_xml_body
ap_get_limit_xml_body

Call ap_custom_response
@param 1 An integer
@param 2 A string
@deffunc ap_custom_response 1 2
ap_custom_response

Call ap_exists_config_define
@param 1 A string
@return An integer
@deffunc ap_exists_config_define 1
ap_exists_config_define

Call ap_auth_type
@return A string
@deffunc ap_auth_type
ap_auth_type

Call ap_auth_name
@return A string
@deffunc ap_auth_name
ap_auth_name

Call ap_satisfies
@return An integer
@deffunc ap_satisfies
ap_satisfies

Call ap_requires
@return A list { {integer, string} ... }
@deffunc ap_requires
ap_requires

Call ap_log_error
@param 1 An integer specifying log level
@param 2 An integer specifying the status
@param 3 A string specifying the error
@deffunc ap_log_error 1 2 3
ap_log_error

Call ap_send_http_header
@deffunc ap_send_http_header
ap_send_http_header

Call ap_send_http_trace
@return An integer
@deffunc ap_send_http_trace
ap_send_http_trace

Call ap_send_http_options
@return An integer
@deffunc ap_send_http_options
ap_send_http_options

Call ap_finalize_request_protocol
@deffunc ap_finalize_request_protocol
ap_finalize_request_protocol

Call ap_send_error_response
@param 1 An integer with recursion level
@deffunc ap_send_error_response
ap_send_error_response

Call ap_set_content_length
@param 1 An integer specifying length
@deffunc ap_set_content_length 1
ap_set_content_length

Call ap_set_keepalive
@return An integer
@deffunc ap_set_keepalive
ap_set_keepalive

Call ap_rationalize_mtime
@param 1 An integer specifying mtime
@return An integer
@deffunc ap_rationalize_mtime 1
ap_rationalize_mtime

Call ap_make_etag
@param 1 An integer specifying force_weak
@return A string
@deffunc ap_make_etag 1
ap_make_etag

Call ap_set_etag
@deffunc ap_set_etag
ap_set_etag

Call ap_set_last_modified
@deffunc ap_set_last_modified
ap_set_last_modified

Call ap_meets_conditions
@return An integer
@deffunc ap_meets_conditions
ap_meets_conditions

Call ap_rputs
@param 1 Either -nonewline or a string to write
@param 2 if param 1 is -nonewline then a string to write
@deffunc ap_rputs 1 2
ap_rputs

Call ap_rwrite
@param 1 Data to write
@deffunc ap_rwrite 1
ap_rwrite

Call ap_rflush
@deffunc ap_rflush
ap_rflush

Call ap_get_status_line
@param 1 An integer specifying status
@return A string
@deffunc ap_get_status_line 1
ap_get_status_line

Call ap_setup_client_block
@param 1 An integer specifying read policy
@return An integer
@deffunc ap_setup_client_block 1
ap_setup_client_block

Call ap_get_client_block, sets variable R with data
@param 1 An integer specifying the number of bytes to read
@return An integer specifying the actual number of bytes read
@deffunc ap_get_client_block 1
ap_get_client_block

Call ap_discard_request_body
@return An integer
@deffunc ap_discard_request_body
ap_discard_request_body

Call ap_note_auth_failure
@deffunc ap_note_auth_failure
ap_note_auth_failure

Call ap_note_basic_auth_failure
@deffunc ap_note_basic_auth_failure
ap_note_basic_auth_failure

Call ap_note_digest_auth_failure
@deffunc ap_note_digest_auth_failure
ap_note_digest_auth_failure

Call ap_get_basic_auth_pw, sets R with password
@return An integer
@deffunc ap_get_basic_auth_pw
ap_get_basic_auth_pw

Call ap_parse_uri
@param 1 A string specifying a uri
@deffunc ap_parse_uri 1
ap_parse_uri

Call ap_method_number_of
@param 1 A string with a method name
@return An integer specifying the method number
@deffunc ap_method_number_of 1
ap_method_number_of

Call ap_method_name_of
@param 1 An integer specifying a method number
@return A string specifying a method name
@deffunc ap_method_name_of 1
ap_method_name_of

Call ap_internal_redirect
@param 1 A string specifying a uri to redirect to
@deffunc ap_internal_redirect 1
ap_internal_redirect

Call ap_internal_redirect_handler
@param 1 A string specifying a uri to redirect to
@deffunc ap_internal_redirect_handler 1
ap_internal_redirect_handler

Call ap_some_auth_required
@return An integer
@deffunc ap_some_auth_required
ap_some_auth_required

Call ap_update_mtime
@param 1 An integer specifying a dependancy
@deffunc ap_update_mtime 1
ap_update_mtime

Call ap_allow_methods
@param 1 An integer specifying a reset
@param 2 A string specifying methods
@deffunc ap_allow_methods 1 2
ap_allow_methods

Call ap_get_server_version
@return A string
@deffunc ap_get_server_version
ap_get_server_version

Call ap_add_version_component
@param 1 A string specifying a version component to add
@deffunc ap_add_version_component 1
ap_add_version_component

Call ap_get_server_built
@return A string
@deffunc ap_get_server_built
ap_get_server_built

Call ap_create_environment, sets array env
@deffunc ap_create_environment
ap_create_environment

Reads variables from request_rec structure
@param 1 variable or "connection" or "server"
@param 2 if param 1 "connection" or "server" then a variable to read
@return The variable read, could be an integer, string, or list
@deffunc r 1 2
r

Sets variables in request_rec structure
@param 1 variable or "connection" or "server"
@param 2 if param 1 "connection" or "server" then variable
@param x variable list of data to be written
@deffunc r_set 1 2 ...
r_set

Ouput text/html
@param 1 A script of text to output
@deffunc output 1
output

- 1.0d0 -| Inital port from mod_tcl* 0.26, single file split into 4
         | (Apache 2.0a9)
         |
- 1.0d1 -| removal of nasties, update of configuration
         |
- 1.0d2 -| addition of some API commands
         |
- 1.0d3 -| more of API exposed, new config option, inital checkin to CVS
         |
- 1.0d4 -| Documentation, 90% of API exposed
         |
- 1.0d5 -| constants commands in ::apache namespace, mmap checking, test
         | script
         |
- 1.0d6 -| ap_send_http_header deprecated, updated to be peachy with
         | Apache 2.0.14
         |
% 1.0d7 %| alive and well
         |
- 1.0d8 -|
         |
- 1.0d9 -|
         |
- 1.0.0 -|