From 94e3de1af23033b0b4687020d451af4e61111c8e Mon Sep 17 00:00:00 2001
From: Adam Dickmeiss <adam@indexdata.dk>
Date: Sun, 17 Feb 2002 09:29:18 +0000
Subject: [PATCH] Robot honour robots meta tag

---
 robot.tcl |   60 +++++++++++++++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 49 insertions(+), 11 deletions(-)

diff --git a/robot.tcl b/robot.tcl
index b6466c3..ffbfce4 100755
--- a/robot.tcl
+++ b/robot.tcl
@@ -1,5 +1,5 @@
 #!/usr/bin/tclsh 
-# $Id: robot.tcl,v 1.29 2001/11/14 09:15:23 adam Exp $
+# $Id: robot.tcl,v 1.30 2002/02/17 09:29:18 adam Exp $
 #
 proc RobotFileNext1 {area lead} {
     # puts "RobotFileNext1 area=$area lead=$lead"
@@ -502,6 +502,13 @@ proc link {url out href body distance} {
 proc RobotTextHtml {url out} {
     global URL maxdistance
 
+    # set title so we can emit it for the body
+    set title {}
+    # if true, nothing will be indexed
+    set noindex 0
+    # if true, nothing will be followed
+    set nofollow 0
+
     set distance 0
     set fdistance 0
     if {$maxdistance < 1000 && [info exists URL($url,dist)]} {
@@ -510,36 +517,67 @@ proc RobotTextHtml {url out} {
     }
     htmlSwitch $URL($url,buf) \
         title {
-	    puts $out "<title>$body</title>"
+            set title $body
         } -nonest meta {
+            # collect metadata and save NAME= CONTENT=..
+            set metaname {}
+            set metacontent {}
             puts -nonewline $out "<meta"
             foreach a [array names parm] {
-		puts -nonewline $out " $a"
+                set al [string tolower $a]
+		puts -nonewline $out " $al"
                 puts -nonewline $out {="}
                 puts -nonewline $out $parm($a)
                 puts -nonewline $out {"}
+                switch -- $al {
+                    "name" {
+                        set metaname [string tolower $parm($a)]
+                    }
+                    "content" {
+                        set metacontent $parm($a)
+                    }
+                }
+            }
+	    puts $out "></meta>"
+            # go through robots directives (af any)
+            if {![string compare $metaname robots]} {
+                set direcs [split [string tolower $metacontent] ,]
+                if {[lsearch $direcs noindex] >= 0} {
+                    set noindex 1
+                }
+                if {[lsearch $direcs nofollow] >= 0} {
+                    set nofollow 1
+                }
             }
-	    puts $out {></meta>}
 	} body {
-	    regsub -all {<!--[^-]*->} $body { } abody
-	    regsub -all -nocase {<script[^<]*</script>} $abody {} bbody
-	    regsub -all {<[^\>]+>} $bbody {} nbody
-	    puts $out "<documentcontent>"
-            puts $out $nbody
-            puts $out "</documentcontent>"
+            # don't print title of document content if noindex is used
+            if {!$noindex} {
+                puts $out "<title>$title</title>"
+                regsub -all {<!--[^-]*->} $body { } abody
+                regsub -all -nocase {<script[^<]*</script>} $abody {} bbody
+                regsub -all {<[^\>]+>} $bbody {} nbody
+                puts $out "<documentcontent>"
+                puts $out $nbody
+                puts $out "</documentcontent>"
+            }
         } -nonest base {
+            # <base href=.. >
             if {![info exists parm(href)]} {
 	        continue
             }
             set href [string trim $parm(href)]
             if {![RobotHref $url href host path]} continue
             set URL($url,bpath) $path
-        } -nonest a {
+        } a {
+            # <a href="...."> .. </a> 
+            # we're not using nonest - otherwise body isn't set
+            if {$nofollow} continue
             if {![info exists parm(href)]} {
 	        continue
             }
             link $url $out [string trim $parm(href)] $body $distance
         } -nonest area {
+            if {$nofollow} continue
             if {![info exists parm(href)]} {
 	        continue
             }
-- 
1.7.10.4