#!/usr/bin/tclsh.docsrc source [file dirname [info script]]/document_header.tcl # Decode an HTTP %-encoded string # proc percent_decode {str} { # rewrite "+" back to space # protect \ and [ and ] by quoting with '\' set str [string map [list + { } "\\" "\\\\" \[ \\\[ \] \\\]] $str] # prepare to process all %-escapes regsub -all -- {%([A-Fa-f][A-Fa-f0-9])%([A-Fa-f89][A-Fa-f0-9])} \ $str {[encoding convertfrom utf-8 [binary decode hex \1\2]]} str regsub -all -- {%([0-7][A-Fa-f0-9])} $str {\\u00\1} str # process %-escapes return [subst -novar $str] } #========================================================================= # This proc is called to parse the arguments passed to this invocation of # the CGI program (via either the GET or POST method). It returns a # key/value list containing the arguments suitable for passing to [array # set]. For example, if the CGI is invoked via a GET request on the URI: # # http://www.sqlite.org/search?query=fts3+table&results=10 # # then the returned list value is: # # {query {fts3 table} results 10} # proc cgi_parse_args {} { global env A if {$env(REQUEST_METHOD) == "GET"} { foreach q [split $env(QUERY_STRING) &] { if {[regexp {([a-z0-9]*)=(.*)} $q all var value]} { set A($var) [percent_decode $value] } } } elseif {$env(REQUEST_METHOD) == "POST"} { set qstring [read stdin $env(CONTENT_LENGTH)] foreach q [split $qstring &] { if {[regexp {([a-z0-9]*)=(.*)} $q all var value]} { set A($var) [percent_decode $value] } } } else { error "Unrecognized method: $env(REQUEST_METHOD)" } } #========================================================================= # The argument contains a key value list. The values in the list are # transformed to an HTTP query key value list. For example: # # % cgi_encode_args {s "search string" t "search \"type\""} # s=search+string&t=search+%22type%22 # proc cgi_encode_args {list} { set reslist [list] foreach {key value} $list { set value [string map { \x20 + \x21 %21 \x2A %2A \x22 %22 \x27 %27 \x28 %28 \x29 %29 \x3B %3B \x3A %3A \x40 %40 \x26 %26 \x3D %3D \x2B %2B \x24 %24 \x2C %2C \x2F %2F \x3F %3F \x25 %25 \x23 %23 \x5B %5B \x5D %5D } $value] lappend reslist "$key=$value" } join $reslist & } proc htmlize {str} { string map {< < > >} $str } proc attrize {str} { string map {< < > > \x22 "} $str } #========================================================================= proc cgi_env_dump {} { set ret "

Arguments

" foreach {key value} [array get ::A] { append ret "
[htmlize $key][htmlize $value]" } append ret "
" append ret "

Environment

" foreach {key value} [array get ::env] { append ret "
[htmlize $key][htmlize $value]" } append ret "
" return $ret } proc footer {} { return {
Powered by FTS5.
} } #------------------------------------------------------------------------- # This command is similar to the builtin Tcl [time] command, except that # it only ever runs the supplied script once. Also, instead of returning # a string like "xxx microseconds per iteration", it returns "x.yy ms" or # "x.yy s", depending on the magnitude of the time spent running the # command. For example: # # % ttime {after 1500} # 1.50 s # % ttime {after 45} # 45.02 ms # proc ttime {script} { set t [lindex [time [list uplevel $script]] 0] if {$t>1000000} { return [format "%.2f s" [expr {$t/1000000.0}]] } return [format "%.2f ms" [expr {$t/1000.0}]] } proc searchresults {} { if {![info exists ::A(q)]} return "" #set ::A(q) [string map {' ''} $A(q)] #regsub -all {[^-/"A-Za-z0-9]} $::A(q) { } ::A(q) # Count the '"' characters in $::A(q). If there is an odd number of # occurences, add a " to the end of the query so that fts5 can parse # it without error. if {[regexp -all \x22 $::A(q)] % 2} { append ::A(q) \x22 } # Set iStart to the index of the first result to display. Results are # indexed starting at zero from most to least relevant. # set iStart [expr {([info exists ::A(i)] ? $::A(i) : 0)*10}] # Grab a list of rowid results. # set q { SELECT rowid FROM page WHERE page MATCH $::A(q) ORDER BY srank(page) DESC, rank * COALESCE( (SELECT percent FROM weight WHERE id=page.rowid), 100 ); } if {[catch { set lRowid [db eval $q] }]} { set x "" foreach word [split $::A(q) " "] { append x " \"[string map [list "\"" "\"\""] $word]\"" } set ::A(q) [string trim $x] set lRowid [db eval $q] } set lRes [list] foreach rowid $lRowid { if {$rowid > 1000} { set parent [expr $rowid / 1000] lappend subsections($parent) $rowid } else { lappend lRes $rowid } } set nRes [llength $lRes] set lRes [lrange $lRes $iStart [expr $iStart+9]] # If there are no results, return a message to that effect. # if {[llength $lRes] == 0} { return [subst { No results for: [htmlize $::A(q)] }] } # HTML markup used to highlight keywords within FTS5 generated snippets. # set open {} set close {} set ellipsis { ... } # Grab the required data # db eval [string map [list %LIST% [join $lRowid ,]] { SELECT rowid AS parentid, snippet(page, 0, $open, $close, $ellipsis, 6) AS s_apis, snippet(page, 2, $open, $close, '', 40) AS s_title1, snippet(page, 3, $open, $close, $ellipsis, 40) AS s_title2, snippet(page, 4, $open, $close, $ellipsis, 40) AS s_content, url, rank FROM page($::A(q)) WHERE rowid IN (%LIST%) }] X { foreach k [array names X] { set data($X(parentid),$k) [set X($k)] } } set ret [subst {

Search results [expr $iStart+1]..[expr {($nRes < $iStart+10) ? $nRes : $iStart+10}] of $nRes for: [htmlize $::A(q)] }] foreach rowid $lRes { foreach a {parentid s_apis s_title1 s_content url rank} { set $a $data($rowid,$a) } if {[info exists subsections($parentid)]} { set childid [lindex $subsections($parentid) 0] set link $data($childid,url) set hdr $data($childid,s_title2) if {$hdr==""} { set s_content "" } else { set s_content [subst { $hdr }] } append s_content " $data($childid,s_content)" } append ret [subst -nocommands {

}] } append ret {
$s_title1
($url)
$s_apis
$s_content
} # If the query returned more than 10 results, add up to 10 links to # each set of 10 results (first link to results 1-10, second to 11-20, # third to 21-30, as required). # if {$nRes>10} { set s(0) {border: solid #044a64 1px ; padding: 1ex ; margin: 1ex} set s(1) "$s(0);background:#044a64;color:white" append ret

for {set i 0} {$i < 10 && ($i*10)<$nRes} {incr i} { append ret [subst { [expr $i+1] }] } append ret

} return $ret } proc main {} { global A sqlite3 db search.db cgi_parse_args db transaction { set t [ttime { if {[catch searchresults srchout]} { set A(q) [string tolower $A(q)] set srchout [searchresults] } set doc "$srchout [footer]" }] } append doc "

Page generated in $t." return $doc # return [cgi_env_dump] } #========================================================================= source [file dirname [info script]]/document_header.tcl if {![info exists env(REQUEST_METHOD)]} { set env(REQUEST_METHOD) GET set env(QUERY_STRING) rebuild=1 set ::HEADER "" #set env(QUERY_STRING) {q="one+two+three+four"+eleven} set env(QUERY_STRING) {q=windows} set ::HEADER "" } if {0==[catch main res]} { set title "Search SQLite Documentation" if {[info exists ::A(q)]} { set initsearch [attrize $::A(q)] append title " - [htmlize $::A(q)]" } else { set initsearch {} } set document [document_header $title "" $initsearch] append document $res } else { set document "

"
  append document "Error: $res\n\n"
  append document $::errorInfo
  append document "
" } puts "Content-type: text/html" puts "Content-Length: [string length $document]" puts "" puts $document puts "" flush stdout close stdout exit