Open Mash Cross Reference
mash/tcl/applications/pathfinder/static_agent.tcl

   # static_agent.tcl --
   #
   #       FIXME: This file needs a description here.
   #
   # Copyright (c) 1998-2002 The Regents of the University of California.
   # All rights reserved.
   #
   # Redistribution and use in source and binary forms, with or without
   # modification, are permitted provided that the following conditions are met:
  #
  # A. Redistributions of source code must retain the above copyright notice,
  #    this list of conditions and the following disclaimer.
  # B. Redistributions in binary form must reproduce the above copyright notice,
  #    this list of conditions and the following disclaimer in the documentation
  #    and/or other materials provided with the distribution.
  # C. Neither the names of the copyright holders nor the names of its
  #    contributors may be used to endorse or promote products derived from this
  #    software without specific prior written permission.
  #
  # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
  # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  # ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR
  # ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  # SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  # CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  # OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  #
  #  @(#) $Header: /usr/mash/src/repository/mash/mash-1/tcl/applications/pathfinder/static_agent.tcl,v 1.8 2002/02/03 04:22:06 lim Exp $
  
  
  import HTTP_Agent
  
  #
  # The HTTP_Agent/Static class is an HTTP-aware agent that can be
  # used to disseminate static pages
  #
  Class HTTP_Agent/Static -superclass HTTP_Agent
  
  HTTP_Agent/Static public init { } {
          $self next
          $self instvar html_dir_ content_types_
  
          # Initialize the html directory.
          #set html_dir_ ~/mash/tcl/applications/mash_server/html/
          set html_dir_ [$self get_option html_dir]
  
          # setup the extension to content-type mappings
          set content_types_(.html) text/html
          set content_types_(.htm)  text/html
          set content_types_(.gif)  image/gif
          set content_types_(.jpg)  image/jpeg
          set content_types_(.jpeg) image/jpeg
          set content_types_(.mash) x-mash/x-script
          set content_types_(.tcl)  application/x-tcl
  }
  
  
  #
  # The handle_request method is called by the MASH_Server when an
  # HTTP request is received.  This method checks for the existence
  # of URLs in the HTML directory and returns the corresponding page.
  #
  HTTP_Agent/Static public handle_request { url key source reply_var } {
          upvar $reply_var reply
          $self instvar html_dir_ content_types_
          mtrace trcNet "-> HTTP_Agent/Static::handle_request called"
  
          if { [string index $url 0] == "/" } {
                  set url [string range $url 1 end]
          }
          if {[string index $url 0] == "/" && [string range $url 0 1] != ".."} {
                  # check this to ensure that we do not inadvertently give
                  # access to our full filesystem thru this URL
                  return 0
          }
  
          set filename [file join $html_dir_ $url]
          if [catch {set fd [open $filename]}] { return 0 }
          if [catch {fconfigure $fd -translation binary}] { return 0 }
          if [catch {set reply(data) [read $fd] }] {
                  catch {close $fd}
                  return 0
          }
          catch {close $fd}
  
          set ext [string tolower [file extension $filename]]
          if [info exists content_types_($ext)] {
                  set reply(headers) [list content-type $content_types_($ext)]
          } else {
                  set reply(headers) [list content-type text/plain]
          }
  
          set reply(status) 200
          return 1
  }