X-Git-Url: http://git.indexdata.com/?a=blobdiff_plain;f=robot.tcl;h=b6466c347186d9954fbdda74c78ed7054fab76c5;hb=9d3f82cd1140362487d8fa6372cac1b24a49d21e;hp=ab3cef4b8b50fe5773d31c671be66ad3cde707a5;hpb=87b050c8552f5b45c870b8c942ca67fe1da363a5;p=tclrobot.git

diff --git a/robot.tcl b/robot.tcl
index ab3cef4..b6466c3 100755
--- a/robot.tcl
+++ b/robot.tcl
@@ -1,22 +1,23 @@
 #!/usr/bin/tclsh 
-# $Id: robot.tcl,v 1.5 1999/12/27 11:49:31 adam Exp $
+# $Id: robot.tcl,v 1.29 2001/11/14 09:15:23 adam Exp $
 #
-proc RobotFileNext {area} {
+proc RobotFileNext1 {area lead} {
+    # puts "RobotFileNext1 area=$area lead=$lead"
     if {[catch {set ns [glob ${area}/*]}]} {
         return {}
     }
-    set off [string first / $area]
-    incr off
-    
     foreach n $ns {
 	if {[file isfile $n]} {
-	    if {[string first :.html $n] > 0} {
-		return http://[string range $area/ $off end]
-            }
-            return http://[string range $n $off end]
+            set off [string last / $n]
+	    incr off 2
+            return $lead/[string range $n $off end]
         }
-        if {[file isdirectory $n]} {
-            set sb [RobotFileNext $n]
+    }
+    foreach n $ns {
+	if {[file isdirectory $n]} {
+            set off [string last / $n]
+	    incr off 2
+            set sb [RobotFileNext1 $n $lead/[string range $n $off end]]
             if {[string length $sb]} {
                 return $sb
             }
@@ -25,42 +26,134 @@ proc RobotFileNext {area} {
     return {}
 }
 
+proc RobotWriteRecord {outf fromurl distance} {
+    puts $outf "<zmbot>"
+    puts $outf "<distance>"
+    puts $outf $distance
+    puts $outf "</distance>"
+    puts $outf "<fromurl>"
+    puts $outf $fromurl
+    puts $outf "</fromurl>"
+    puts $outf "</zmbot>"
+}
+
+proc RobotReadRecord {inf fromurlx distancex} {
+    upvar $fromurlx fromurl
+    upvar $distancex distance
+    gets $inf
+    gets $inf
+    set distance [string trim [gets $inf]]
+    # puts "got distance = $distance"
+    gets $inf
+    gets $inf
+    set fromurl [string trim [gets $inf]]
+}
+
+proc RobotFileNext {area} {
+    global robotSeq
+    global idletime ns
+    global status
+
+    # puts "RobotFileNext robotSeq=$robotSeq"
+    if {$robotSeq < 0} {
+	return {}
+    }
+    if {$robotSeq == 0} {
+	if {[catch {set ns [glob ${area}/*]}]} {
+	    return {}
+	}
+    }
+    set off [string length $area]
+    incr off
+    set n [lindex $ns $robotSeq]
+    if {![string length $n]} {
+	set robotSeq -1
+	flush stdout
+        set statusfile [open status w]
+        puts $statusfile "$status(unvisited) $status(bad) $status(visited)"
+        close $statusfile
+	return wait
+    }
+    incr robotSeq
+    if {[file isfile $n/frobots.txt]} {
+	puts "ok returning http://[string range $n $off end]/robots.txt"
+	return http://[string range $n $off end]/robots.txt
+    } elseif {[file isdirectory $n]} {
+	set sb [RobotFileNext1 $n http://[string range $n $off end]]
+	if {[string length $sb]} {
+	    return $sb
+	}
+    }
+    puts "no more work at end of RobotFileNext n=$n"
+    puts "ns=$ns"
+    return {}
+}
+
+
 proc RobotFileExist {area host path} {
-    set comp [split $area/$host$path /]
-    set l [llength $comp]
+    global debuglevel
+
+    if {$debuglevel > 3} {
+        puts "RobotFileExist begin area=$area host=$host path=$path"
+    }
+    set lpath [split $path /]
+    set l [llength $lpath]
     incr l -1
-    if {![string length [lindex $comp $l]]} {
-        set comp [split $area/$host$path:.html /]
-    } elseif {[file exists [join $comp /]]} {
-	return 1
-    } else {
-	set comp [split $area/$host$path/:.html /]
+    set t [lindex $lpath $l]
+    incr l -1
+    set npath $area/$host[join [lrange $lpath 0 $l] /d]/f$t
+    if {$debuglevel > 3} {
+        puts "RobotFileExist end npath=$npath"
     }
-    return [file exists [join $comp /]]
+    return [file exists $npath]
 }
 
 proc RobotFileUnlink {area host path} {
-    set comp [split $area/$host$path /]
-    set l [llength $comp]
+    global status
+    # puts "RobotFileUnlink begin"
+    # puts "area=$area host=$host path=$path"
+    set lpath [split $path /]
+    set l [llength $lpath]
     incr l -1
-    if {![string length [lindex $comp $l]]} {
-        set comp [split $area/$host$path:.html /]
-    }
+    set t [lindex $lpath $l]
+    incr l -1
+    set npath $area/$host[join [lrange $lpath 0 $l] /d]/f$t
+    # puts "npath=$npath"
+    set comp [split $npath /]
     if {[catch {exec rm [join $comp /]}]} return
+
+    set l [llength $comp]
+    incr l -1
     incr l -1
+    incr status($area) -1
     for {set i $l} {$i > 0} {incr i -1} {
         set path [join [lrange $comp 0 $i] /]
 	if {![catch {glob $path/*}]} return
         exec rmdir ./$path
     }
+    # puts "RobotFileUnlink end"
 }
 
-proc RobotFileOpen {area host path} {
+proc RobotFileClose {out} {
+    if [string compare $out stdout] {
+	close $out
+    }
+}
+
+proc RobotFileOpen {area host path {mode w}} {
     set orgPwd [pwd]
     global workdir
+    global status
+    global debuglevel
 
-    #puts "RobotFileOpen orgPwd=$orgPwd area=$area host=$host path=$path"
+    if {![info exists workdir]} {
+	return stdout
+    }
+    if {$debuglevel > 3} {
+        puts "RobotFileOpen orgPwd=$orgPwd area=$area host=$host path=$path mode=$mode"
+    }
     if {[string compare $orgPwd $workdir]} {
+        puts "ooops. RobotFileOpen failed"
 	puts "workdir = $workdir"
 	puts "pwd = $orgPwd"
 	exit 1
@@ -69,48 +162,99 @@ proc RobotFileOpen {area host path} {
     set len [llength $comp]
     incr len -1
     for {set i 0} {$i < $len} {incr i} {
-        set d [lindex $comp $i]
+        if {$i > 1} {
+            set d "d[lindex $comp $i]" 
+        } else {
+            set d [lindex $comp $i]
+        }
         if {[catch {cd ./$d}]} {
             exec mkdir $d
             cd ./$d
+	    if {![string compare $area unvisited] && $i == 1 && $mode == "w"} {
+		set out [open frobots.txt w]
+		puts "creating robots.txt in $d"
+		close $out
+                incr status(unvisited)
+	    }
         }
     }
     set d [lindex $comp $len]
     if {[string length $d]} {
-        set out [open $d w]
+        set out [open f$d $mode]
+        if {0} {
+            if {[file isfile $d/f]} {
+                set out [open $d/f $mode]
+            } else {
+                set out [open f$d $mode]
+            }
+        }
     } else {
-        set out [open :.html w]
+        set out [open f $mode]
+    }
+    if {$mode == "w"} {
+        incr status($area)
     }
     cd $orgPwd
-    #puts "RobotFileStop"
     return $out
 }
 
-proc RobotRestart {} {
+proc RobotRR {} {
+    global robotSeq robotsRunning
+
+    incr robotsRunning -1
+    while {$robotsRunning} {
+	vwait robotsRunning
+    }
+    set robotSeq 0
+    RobotStart
+}
+
+proc RobotRestart {url sock} {
+    global URL robotsRunning
+
+    close $sock
+    after cancel $URL($sock,cancel) 
+
+    foreach v [array names URL $url,*] {
+	unset URL($v)
+    }
+
+    incr robotsRunning -1
+    RobotStart
+}
+
+proc RobotStart {} {
     global URL
-    
-    while {1} {    
+    global robotsRunning robotsMax idletime
+  
+    # puts "RobotStart"
+    while {1} {
         set url [RobotFileNext unvisited]
         if {![string length $url]} {
-	    puts "No more unvisited"
-	    break
+	    return
+	}
+	incr robotsRunning
+	if {[string compare $url wait] == 0} {
+	    after $idletime RobotRR
+	    return
 	}
         set r [RobotGetUrl $url {}]
         if {!$r} {
-	    puts "RobotGetUrl returned 0 on url=$url"
-	    return
+	    if {$robotsRunning >= $robotsMax} return
         } else {
-            RobotFileUnlink unvisited $URL($url,host) $URL($url,path)
-        }
+	    incr robotsRunning -1
+	    if {![RobotFileExist bad $URL($url,hostport) $URL($url,path)]} {
+		set outf [RobotFileOpen bad $URL($url,hostport) $URL($url,path)]
+		RobotFileClose $outf
+	    }
+            RobotFileUnlink unvisited $URL($url,hostport) $URL($url,path)
+	}
     }
-    exit 0
 }
 
-proc headSave {url out title} {
+proc headSave {url out} {
     global URL
     
-    puts $out {<meta>}
-    puts $out "<title>$title</title>"
     if {[info exists URL($url,head,last-modified)]} {
         puts $out "<lastmodified>$URL($url,head,last-modified)</lastmodified>"
     }
@@ -134,12 +278,27 @@ proc headSave {url out title} {
 }
 
 proc RobotHref {url hrefx hostx pathx} {
-    global URL domains
+    global URL domains debuglevel
     upvar $hrefx href
     upvar $hostx host
     upvar $pathx path
 
-    # puts "Ref url = $url href=$href"
+    if {$debuglevel > 1} {
+        puts "Ref input url = $url href=$href"
+    }
+
+    if {[string first { } $href] >= 0} {
+	return 0
+    }
+    if {[string length $href] > 256} {
+	return 0
+    }
+    if {[string first {?} $href] >= 0} {
+	return 0
+    }
+    if {[string first {?} $url] >= 0 && [string first {?} $href] >= 0} {
+	return 0
+    }
     # get method (if any)
     if {![regexp {^([^/:]+):(.*)} $href x method hpath]} {
 	set hpath $href
@@ -150,259 +309,454 @@ proc RobotHref {url hrefx hostx pathx} {
 	}
     }
     # get host (if any)
-    if {![regexp {^//([^/]+)(.*)} $hpath x host epath]} {
-	set epath $hpath
-	set host $URL($url,host)
-    } else {
-	if {![string length $epath]} {
-	    set epath /
+    if {[regexp {^//([^/]+)([^\#]*)} $hpath x host surl]} {
+	if {![string length $surl]} {
+	    set surl /
 	}
-	set ok 0
-	foreach domain $domains {
-	    if {[string match $domain $host]} {
-		set ok 1
-		break
+        if {[info exist domains]} {
+	    set ok 0
+	    foreach domain $domains {
+	        if {[string match $domain $host]} {
+		    set ok 1
+		    break
+	         }
 	    }
-	}
-	if {!$ok} {
-	    return 0
-	}
+	    if {!$ok} {
+	        return 0
+	    }
+        }
+    } else {
+	regexp {^([^\#]*)} $hpath x surl
+	set host $URL($url,hostport)
     }
-    if {[regexp {^(\#|\?)} $epath]} {
-	# within page
+    if {![string length $surl]} {
 	return 0
-    } elseif {![regexp {^([/][^\#?]*)} $epath x path]} {
+    }
+    if {[string first / $surl]} {
 	# relative path
-	set ext [file extension $URL($url,path)] 
-	if {[string compare $ext {}]} {
-	    set dpart [file dirname $URL($url,path)]
+        set curpath $URL($url,path)
+        if {[info exists URL($url,bpath)]} {
+            set curpath $URL($url,bpath)
+        }
+	regexp {^([^\#?]*)} $curpath x dpart
+	set l [string last / $dpart]
+	if {[expr $l >= 0]} {
+	    set surl [string range $dpart 0 $l]$surl
 	} else {
-	    set dpart $URL($url,path)
+	    set surl $dpart/$surl
 	}
-	regexp {^([^\#?]+)} $epath x path
-	set path [string trimright $dpart /]/$path
-    }
-    set c [split $path /]
-    set i [llength $c]
-    incr i -1
-    set path [lindex $c $i]
-    incr i -1
-    while {$i >= 0} {
-	switch -- [lindex $c $i] {
+    }
+    set surllist [split $surl /]
+    catch {unset path}
+    set pathl 0
+    foreach c $surllist {
+        switch -- $c {
 	    .. {
-		incr i -2
-	    }
-	    . {
-		incr i -1
+ 		if {$pathl > 1} {
+		    incr pathl -2
+		    set path [lrange $path 0 $pathl]
+		    incr pathl
+		}
 	    }
-	    default {
-		set path [lindex $c $i]/$path
-		incr i -1
+            . {
+
+            }
+            default {
+		incr pathl
+                lappend path $c
 	    }
 	}
-    } 
+    }
+    if {$debuglevel > 4} {
+        puts "pathl=$pathl output path=$path"
+    }
+    set path [join $path /]
+    if {![string length $path]} {
+	set path /
+    }
+    regsub -all {~} $path {%7E} path
     set href "$method://$host$path"
-    # puts "Ref href = $href"
-    return 1
-}
-
-proc Robot401 {url} {
-    global URL
 
-    puts "Bad link $url"
-    RobotFileUnlink unvisited $URL($url,host) $URL($url,path)
-    if {![RobotFileExist forbidden $URL($url,host) $URL($url,path)]} {
-	set outf [RobotFileOpen forbidden $URL($url,host) $URL($url,path)]
-	close $outf
+    if {$debuglevel > 1} {
+        puts "Ref result = $href"
     }
+    return [checkrule url $href]
 }
 
-proc Robot404 {url} {
+proc RobotError {url code} {
     global URL
 
-    puts "Bad link $url"
-    RobotFileUnlink unvisited $URL($url,host) $URL($url,path)
-    if {![RobotFileExist bad $URL($url,host) $URL($url,path)]} {
-	set outf [RobotFileOpen bad $URL($url,host) $URL($url,path)]
-	close $outf
+    puts "Bad URL $url (code $code)"
+    set fromurl {}
+    set distance -1
+    if {[RobotFileExist unvisited $URL($url,hostport) $URL($url,path)]} {
+	set inf [RobotFileOpen unvisited $URL($url,hostport) $URL($url,path) r]
+	RobotReadRecord $inf fromurl distance
+	RobotFileClose $inf
+    }
+    RobotFileUnlink unvisited $URL($url,hostport) $URL($url,path)
+    if {![RobotFileExist bad $URL($url,hostport) $URL($url,path)]} {
+	set outf [RobotFileOpen bad $URL($url,hostport) $URL($url,path)]
+	RobotWriteRecord $outf $fromurl $distance
+	RobotFileClose $outf
     }
 }
 
-proc Robot301 {url tourl} {
+proc RobotRedirect {url tourl code} {
     global URL
 
     puts "Redirecting from $url to $tourl"
-    RobotFileUnlink unvisited $URL($url,host) $URL($url,path)
+
+    set distance {}
+    set fromurl {}
+    if {[RobotFileExist unvisited $URL($url,hostport) $URL($url,path)]} {
+	set inf [RobotFileOpen unvisited $URL($url,hostport) $URL($url,path) r]
+	RobotReadRecord $inf fromurl distance
+	RobotFileClose $inf
+    }
+    if {![RobotFileExist bad $URL($url,hostport) $URL($url,path)]} {
+	set outf [RobotFileOpen bad $URL($url,hostport) $URL($url,path)]
+	RobotWriteRecord $outf $fromurl $distance
+	RobotFileClose $outf
+    }
     if {[RobotHref $url tourl host path]} {
-	if {![RobotFileExist unvisited $host $path]} {
-	    set outf [RobotFileOpen unvisited $host $path]
-	    close $outf
+	if {![RobotFileExist visited $host $path]} {
+	    if {![RobotFileExist unvisited $host $path]} {
+		set outf [RobotFileOpen unvisited $host $path]
+		RobotWriteRecord $outf $fromurl $distance
+		RobotFileClose $outf
+	    }
+	} else {
+	    set olddistance {}
+	    set inf [RobotFileOpen visited $host $path r]
+	    RobotReadRecord $inf oldurl olddistance
+	    RobotFileClose $inf
+	    if {[string length $olddistance] == 0} {
+		set olddistance 1000
+	    }
+	    if {[string length $distance] == 0} {
+		set distance 1000
+	    }
+	    puts "distance=$distance olddistance=$olddistance"
+	    if {[expr $distance < $olddistance]} {
+		set outf [RobotFileOpen unvisited $host $path]
+		RobotWriteRecord $outf $tourl $distance
+		RobotFileClose $outf
+	    }
 	}
     }
+    if {[catch {RobotFileUnlink unvisited $URL($url,hostport) $URL($url,path)}]} {
+        puts "unlink failed"
+        exit 1
+    }
 }
 
-proc Robot200 {url} {
-    global URL domains
+proc link {url out href body distance} {
+    global URL maxdistance
+    if {[expr $distance > $maxdistance]} return
+    
+    if {![RobotHref $url href host path]} return
     
-    # puts "Parsing $url"
-    set out [RobotFileOpen visited $URL($url,host) $URL($url,path)]
-    set ti 0
-    if {[info exists URL($url,buf)]} {
-        set htmlContent $URL($url,buf)
-        
-        htmlSwitch $htmlContent \
+    puts $out "<cr>"
+    puts $out "<identifier>$href</identifier>"
+    puts $out "<description>$body</description>"
+    puts $out "</cr>"
+    
+    if {![RobotFileExist visited $host $path]} {
+        set olddistance 1000
+        if {![RobotFileExist bad $host $path]} {
+            if {[RobotFileExist unvisited $host $path]} {
+                set inf [RobotFileOpen unvisited $host $path r]
+                RobotReadRecord $inf oldurl olddistance
+                RobotFileClose $inf
+            }
+        } else {
+            set olddistance 0
+        }
+        if {[string length $olddistance] == 0} {
+            set olddistance 1000
+        }
+        if {[expr $distance < $olddistance]} {
+            set outf [RobotFileOpen unvisited $host $path]
+            RobotWriteRecord $outf $url $distance
+            RobotFileClose $outf
+        }
+    } elseif {[string compare $href $url]} {
+        set inf [RobotFileOpen visited $host $path r]
+        RobotReadRecord $inf xurl olddistance
+        close $inf
+        if {[string length $olddistance] == 0} {
+            set olddistance 1000
+        }
+        if {[expr $distance < $olddistance]} {
+            puts "OK remarking url=$url href=$href"
+            puts "olddistance = $olddistance"
+            puts "newdistance = $distance"
+            set outf [RobotFileOpen unvisited $host $path]
+            RobotWriteRecord $outf $url $distance
+            RobotFileClose $outf
+        }
+    }
+}
+
+proc RobotTextHtml {url out} {
+    global URL maxdistance
+
+    set distance 0
+    set fdistance 0
+    if {$maxdistance < 1000 && [info exists URL($url,dist)]} {
+        set fdistance $URL($url,dist)
+	set distance [expr $fdistance + 1]
+    }
+    htmlSwitch $URL($url,buf) \
         title {
-            if {!$ti} {
-                headSave $url $out $body
-                set ti 1
+	    puts $out "<title>$body</title>"
+        } -nonest meta {
+            puts -nonewline $out "<meta"
+            foreach a [array names parm] {
+		puts -nonewline $out " $a"
+                puts -nonewline $out {="}
+                puts -nonewline $out $parm($a)
+                puts -nonewline $out {"}
             }
+	    puts $out {></meta>}
 	} body {
-	    regsub -all -nocase {<script.*</script>} $body {} abody
-	    regsub -all {<[^\>]+>} $abody {} nbody
+	    regsub -all {<!--[^-]*->} $body { } abody
+	    regsub -all -nocase {<script[^<]*</script>} $abody {} bbody
+	    regsub -all {<[^\>]+>} $bbody {} nbody
 	    puts $out "<documentcontent>"
             puts $out $nbody
             puts $out "</documentcontent>"
-        } a {
+        } -nonest base {
+            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 {
+            if {![info exists parm(href)]} {
+	        continue
+            }
+            link $url $out [string trim $parm(href)] $body $distance
+        } -nonest area {
             if {![info exists parm(href)]} {
-	        puts "no href"
 	        continue
             }
-            if {!$ti} {
-                headSave $url $out "untitled"
-                set ti 1
+            link $url $out [string trim $parm(href)] $body $distance
+        } -nonest frame {
+            if {![info exists parm(src)]} {
+	        continue
             }
-	    if {1} {
-		set href $parm(href)
-		if {![RobotHref $url href host path]} continue
-		
-		puts $out "<cr>"
-		puts $out "<identifier>$href</identifier>"
-		puts $out "<description>$body</description>"
-		puts $out "</cr>"
+            link $url $out [string trim $parm(src)] $body $fdistance
+	}
+}
 
-		if {![RobotFileExist visited $host $path]} {
-		    if {[catch {set outf [RobotFileOpen unvisited $host $path]} msg]} {
-			puts "--- Error $msg"
-			exit 1
+proc RobotsTxt {url} {
+    global agent URL
+
+    RobotsTxt0 URL(URL($url,hostport),robots) $URL($url,buf)
+}
+
+proc RobotsTxt0 {v buf} {
+    global URL agent
+    set section 0
+    foreach l [split $buf \n] {
+	if {[regexp {([-A-Za-z]+):[ ]*([^\# ]+)} $l match cmd arg]} {
+	    puts "cmd=$cmd arg=$arg"
+	    switch -- [string tolower $cmd] {
+		user-agent {
+		    if {$section} break
+		    set pat [string tolower $arg]*
+		    set section [string match $pat $agent]
+		}
+		disallow {
+		    if {$section} {
+			puts "rule [list 0 $arg]"
+			lappend $v [list 0 $arg]
+		    }
+		}
+		allow {
+		    if {$section} {
+			puts "rule [list 1 $arg]"
+			lappend $v [list 1 $arg]
 		    }
-		    close $outf
 		}
 	    }
-        }
+	}
     }
-    if {!$ti} {
-	headSave $url $out "untitled"
-	set ti 1
+}
+
+proc RobotTextPlain {url out} {
+    global URL
+
+    puts $out "<documentcontent>"
+    regsub -all {<} $URL($url,buf) {\&lt;} content
+    puts $out $content
+    puts $out "</documentcontent>"
+
+    if {![string compare $URL($url,path) /robots.txt]} {
+	RobotsTxt $url
+    }
+}
+
+proc RobotWriteMetadata {url out} {
+    global URL domains
+
+    puts $out "<zmbot>"
+
+    set distance 1000
+    if {[RobotFileExist unvisited $URL($url,hostport) $URL($url,path)]} {
+	set inf [RobotFileOpen unvisited $URL($url,hostport) $URL($url,path) r]
+	RobotReadRecord $inf fromurl distance
+	RobotFileClose $inf
+    }
+    set URL($url,dist) $distance
+    puts $out "<distance>"
+    puts $out "  $distance"
+    puts $out "</distance>"
+    headSave $url $out
+    puts "Parsing $url distance=$distance"
+    switch $URL($url,head,content-type) {
+        text/html {
+            if {[string length $distance]} {
+                RobotTextHtml $url $out
+            }
+        }
+        text/plain {
+            RobotTextPlain $url $out
+        }
     }
-    puts $out "</meta>"
-    close $out
-    # puts "Parsing done"
-    RobotFileUnlink unvisited $URL($url,host) $URL($url,path)
+    puts $out "</zmbot>"
 }
 
-proc RobotReadBody {url sock} {
+proc Robot200 {url} {
+    global URL domains
+    
+    set out [RobotFileOpen raw $URL($url,hostport) $URL($url,path)]
+    puts -nonewline $out $URL($url,buf)
+    RobotFileClose $out
+
+    set out [RobotFileOpen visited $URL($url,hostport) $URL($url,path)]
+    RobotWriteMetadata $url $out
+    RobotFileClose $out
+
+    RobotFileUnlink unvisited $URL($url,hostport) $URL($url,path)
+}
+
+proc RobotReadContent {url sock binary} {
     global URL
 
     set buffer [read $sock 16384]
     set readCount [string length $buffer]
-    
+
     if {$readCount <= 0} {
-	close $sock
 	Robot200 $url
-	RobotRestart
+	RobotRestart $url $sock
+    } elseif {!$binary && [string first \0 $buffer] >= 0} {
+	Robot200 $url
+	RobotRestart $url $sock
     } else {
 	# puts "Got $readCount bytes"
 	set URL($url,buf) $URL($url,buf)$buffer
     }
 }
 
-proc RobotReadHead {url sock} {
-    global URL
+proc RobotReadHeader {url sock} {
+    global URL debuglevel
 
-    set buffer [read $sock 8192]
+    if {$debuglevel > 1} {
+        puts "HTTP head $url"
+    }
+    if {[catch {set buffer [read $sock 2148]}]} {
+	RobotError $url 404
+	RobotRestart $url $sock
+        return
+    }
     set readCount [string length $buffer]
     
     if {$readCount <= 0} {
-	Robot404 $url
-	close $sock
-	RobotRestart
+	RobotError $url 404
+	RobotRestart $url $sock
     } else {
 	# puts "Got $readCount bytes"
 	set URL($url,buf) $URL($url,buf)$buffer
 	
-	set n [string first \n\n $URL($url,buf)]
+	set n [string first \r\n\r\n $URL($url,buf)]
 	if {$n > 1} {
 	    set code 0
 	    set version {}
 	    set headbuf [string range $URL($url,buf) 0 $n]
-	    incr n
-	    incr n
+	    incr n 4
 	    set URL($url,buf) [string range $URL($url,buf) $n end]
 	    
 	    regexp {^HTTP/([0-9.]+)[ ]+([0-9]+)} $headbuf x version code
 	    set lines [split $headbuf \n]
 	    foreach line $lines {
-		if {[regexp {^([^:]+):[ ]+(.*)} $line x name value]} {
-		    set URL($url,head,[string tolower $name]) $value
+		if {[regexp {^([^:]+):[ ]+([^;]*)} $line x name value]} {
+		    set URL($url,head,[string tolower $name]) [string trim $value]
 		}
 	    }
-	    puts "code = $code"
+	    puts "HTTP CODE $code"
 	    set URL($url,state) skip
 	    switch $code {
 		301 {
-		    Robot301 $url $URL($url,head,location)
-		    close $sock
-		    RobotRestart
+		    RobotRedirect $url $URL($url,head,location) 301
+		    RobotRestart $url $sock
 		}
 		302 {
-		    Robot301 $url $URL($url,head,location)
-		    close $sock
-		    RobotRestart
-		}
-		404 {
-		    Robot404 $url
-		    close $sock
-		    RobotRestart
-		}
-		401 {
-		    Robot401 $url
-		    close $sock
-		    RobotRestart
+		    RobotRedirect $url $URL($url,head,location) 302
+		    RobotRestart $url $sock
 		}
 		200 {
-		    if {[info exists URL($url,head,content-type)]} {
-			if {![string compare $URL($url,head,content-type) text/html]} {
-			    set URL($url,state) html
-			}
+		    if {![info exists URL($url,head,content-type)]} {
+			set URL($url,head,content-type) {}
 		    }
-		    if {[string compare $URL($url,state) html]} {
-			close $sock
-			Robot200 $url
-			RobotRestart
-		    } else {
-			fileevent $sock readable [list RobotReadBody $url $sock]
+		    set binary 1
+		    switch -glob -- $URL($url,head,content-type) {
+			text/* {
+			    set binary 0
+			}
 		    }
+                    if {![regexp {/robots.txt$} $url]} {
+                        if {![checkrule mime $URL($url,head,content-type)]} {
+                            RobotError $url mimedeny
+                            RobotRestart $url $sock
+                            return
+                        }
+                    }
+		    fileevent $sock readable [list RobotReadContent $url $sock $binary]
 		}
 		default {
-		    Robot404 $url
-		    close $sock
-		    RobotRestart
+		    RobotError $url $code
+		    RobotRestart $url $sock
 		}
 	    }
 	}
     }
 }
 
+proc RobotSockCancel {url sock} {
+
+    puts "RobotSockCancel sock=$sock url=$url"
+    RobotError $url 401
+    RobotRestart $url $sock
+}
+
 proc RobotConnect {url sock} {
-    global URL
+    global URL agent acceptLanguage
 
-    fconfigure $sock -translation {auto crlf} -blocking 0
-    puts "Reading $url"
-    fileevent $sock readable [list RobotReadHead $url $sock]
+    fconfigure $sock -translation {lf crlf} -blocking 0
+    fileevent $sock readable [list RobotReadHeader $url $sock]
     puts $sock "GET $URL($url,path) HTTP/1.0"
     puts $sock "Host: $URL($url,host)"
+    puts $sock "User-Agent: $agent"
+    if {[string length $acceptLanguage]} {
+        puts $sock "Accept-Language: $acceptLanguage"
+    }
     puts $sock ""
     flush $sock
+    set URL($sock,cancel) [after 30000 [list RobotSockCancel $url $sock]]
 }
 
 proc RobotNop {} {
@@ -410,10 +764,10 @@ proc RobotNop {} {
 }
 
 proc RobotGetUrl {url phost} {
-    global URL
-    puts "---------"
-    puts $url
-    if {![regexp {([^:]+)://([^/]+)([^ ]*)} $url x method hostport path]} {
+    global URL robotsRunning
+    flush stdout
+    puts "Retrieve $robotsRunning url=$url"
+    if {![regexp {([^:]+)://([^/]+)(.*)} $url x method hostport path]} {
         return -1
     }
     if {![regexp {([^:]+):([0-9]+)} $hostport x host port]} {
@@ -422,10 +776,37 @@ proc RobotGetUrl {url phost} {
     }
     set URL($url,method) $method
     set URL($url,host) $host
-    set URL($url,port) $port
+    set URL($url,hostport) $hostport
     set URL($url,path) $path
     set URL($url,state) head
     set URL($url,buf) {}
+
+    if {[string compare $path /robots.txt]} {
+	set ok 1
+	if {![info exists URL($hostport,robots)]} {
+	    puts "READING robots.txt for host $hostport"
+	    if {[RobotFileExist visited $hostport /robots.txt]} {
+		set inf [RobotFileOpen visited $hostport /robots.txt r]
+		set buf [read $inf 32768]
+		close $inf
+	    } else {
+		set buf "User-agent: *\nAllow: /\n"
+	    }
+	    RobotsTxt0 URL($hostport,robots) $buf
+	}
+	if {[info exists URL($hostport,robots)]} {
+	    foreach l $URL($hostport,robots) {
+		if {[string first [lindex $l 1] $path] == 0} {
+		    set ok [lindex $l 0]
+		    break
+		}
+	    }
+	}
+	if {!$ok} {
+	    puts "skipped due to robots.txt"
+	    return -1
+	}
+    }
     if [catch {set sock [socket -async $host $port]}] {
         return -1
     }
@@ -441,21 +822,207 @@ if {![llength [info commands htmlSwitch]]} {
     }
 }
 
-if {[llength $argv] < 2} {
-    puts "Tclrobot: usage <domain> <start>"
-    puts " Example: '*.dk' www.indexdata.dk"
-    exit 1
+set agent "zmbot/0.1"
+if {![catch {set os [exec uname -s -r]}]} {
+    set agent "$agent ($os)"
+}
+
+puts "agent: $agent"
+
+proc bgerror {m} {
+    global errorInfo
+    puts "BGERROR $m"
+    puts $errorInfo
 }
 
+set robotsRunning 0
+set robotSeq 0
 set workdir [pwd]
+set idletime 60000
+set acceptLanguage {}
+set debuglevel 0
+set status(unvisited) 0
+set status(visited) 0
+set status(bad) 0
+set status(raw) 0
+
+
+# Rules: allow, deny, url
+
+proc checkrule {type this} {
+    global alrules
+    global debuglevel
+
+    if {$debuglevel > 3} {
+        puts "CHECKRULE $type $this"
+    }
+    if {[info exist alrules]} {
+        foreach l $alrules {
+            if {$debuglevel > 3} {
+                puts "consider $l"
+            }
+            # consider type
+            if {[lindex $l 1] != $type} continue
+            # consider mask (! negates)
+            set masks [lindex $l 2]
+	    set ok 0
+	    foreach mask $masks {	
+                if {$debuglevel > 4} {
+                    puts "consider single mask $mask"
+                }
+                if {[string index $mask 0] == "!"} {
+                    set mask [string range $mask 1 end]
+                    if {[string match $mask $this]}  continue
+                } else {
+                    if {![string match $mask $this]} continue
+                }
+                set ok 1
+            }
+            if {$debuglevel > 4} {
+                puts "ok = $ok"
+            }
+            if {!$ok} continue
+            # OK, we have a match
+            if {[lindex $l 0] == "allow"} {
+                if {$debuglevel > 3} {
+                    puts "CHECKRULE MATCH OK"
+                }
+                return 1
+            } else {
+                if {$debuglevel > 3} {
+                    puts "CHECKFULE MATCH FAIL"
+                }
+                return 0
+            }
+        }
+    }
+    if {$debuglevel > 3} {
+        puts "CHECKRULE MATCH OK"
+    }
+    return 1
+}
+
+
+proc url {href} {
+    global debuglevel
+
+    if {[RobotHref http://www.indexdata.dk/ href host path]} {
+        if {![RobotFileExist visited $host $path]} {
+            set outf [RobotFileOpen unvisited $host $path]
+            RobotWriteRecord $outf href 0
+            RobotFileClose $outf
+        }
+    }
+}
+
+proc deny {type stuff} {
+    global alrules
+
+    lappend alrules [list deny $type $stuff]
+}
+
+proc allow {type stuff} {
+    global alrules
+
+    lappend alrules [list allow $type $stuff]
+}
+
+proc debug {level} {
+    global debuglevel
+
+    set debuglevel $level
+}
+
+# Parse options
+
+set i 0
+set l [llength $argv]
+
+if {$l < 2} {
+    puts {tclrobot: usage:}
+    puts {tclrobot [-j jobs] [-i idle] [-c count] [-d domain] [-r rules] [url ..]}
+    puts " Example: -c 3 -d '*.dk' http://www.indexdata.dk/"
+
+    exit 1
+}
+while  {$i < $l} {
+    set arg [lindex $argv $i]
+    switch -glob -- $arg {
+	-j* {
+	    set robotsMax [string range $arg 2 end]
+	    if {![string length $robotsMax]} {
+		set robotsMax [lindex $argv [incr i]]
+	    }
+	}
+	-c* {
+	    set maxdistance [string range $arg 2 end]
+	    if {![string length $maxdistance]} {
+		set maxdistance [lindex $argv [incr i]]
+	    }
+	}
+	-d* {
+	    set dom [string range $arg 2 end]
+	    if {![string length $dom]} {
+		set dom [lindex $argv [incr i]]
+	    }
+	    lappend domains $dom
+	}
+	-i* {
+	    set idletime [string range $arg 2 end]
+	    if {![string length $idletime]} {
+		set idletime [lindex $argv [incr i]]
+	    }
+	}
+        -l* {
+	    set acceptLanguage [string range $arg 2 end]
+	    if {![string length $acceptLanguage]} {
+		set acceptLanguage [lindex $argv [incr i]]
+ 	    }
+	}
+        -r* {
+	    set rfile [string range $arg 2 end]
+	    if {![string length $rfile]} {
+		set rfile [lindex $argv [incr i]]
+ 	    }
+            source $rfile
+        }
+	default {
+	    set href $arg
+	    if {[RobotHref http://www.indexdata.dk/ href host path]} {
+		if {![RobotFileExist visited $host $path]} {
+		    set outf [RobotFileOpen unvisited $host $path]
+		    RobotWriteRecord $outf href 0
+		    RobotFileClose $outf
+		}
+	    }
+	}
+    }
+    incr i
+}
+
+if {![info exist domains]} {
+    set domains {*}
+}
+if {![info exist maxdistance]} {
+    set maxdistance 50
+}
+if {![info exist robotsMax]} {
+    set robotsMax 5
+}
+
+puts "domains=$domains"
+puts "max distance=$maxdistance"
+puts "max jobs=$robotsMax"
+
+
+RobotStart
+
 
-set domains [lindex $argv 0]
-set site [lindex $argv 1]
-if {[string length $site]} {
-    set x [RobotFileOpen unvisited $site /]
-    close $x
+while {$robotsRunning} {
+    vwait robotsRunning
 }
 
+set statusfile [open status w]
+puts $statusfile "$status(unvisited) $status(bad) $status(visited)"
+close $statusfile
 
-RobotRestart
-vwait forever