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### Copyright 2004, Xavier Neys (neysx@gentoo.org)
# #
# # This file is part of gorg.
# #
# # gorg is free software; you can redistribute it and/or modify
# # it under the terms of the GNU General Public License as published by
# # the Free Software Foundation; either version 2 of the License, or
# # (at your option) any later version.
# #
# # gorg is distributed in the hope that it will be useful,
# # but WITHOUT ANY WARRANTY; without even the implied warranty of
# # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# # GNU General Public License for more details.
# #
# # You should have received a copy of the GNU General Public License
# # along with Foobar; if not, write to the Free Software
### Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
require 'dbi'
require 'yaml'
require 'gorg/base'
require 'cgi'
module GDig
class GFile
def initialize(root, f, xlang)
@root = root
@fname = f
@xpath2lang = xlang
end
def txt
unless @txt then
@txt, @lang = txtifyFile
end
@txt
end
def lang
unless @lang then
@txt, @lang = txtifyFile
end
@lang
end
private
def txtifyFile
x=Gorg::XSL.new
x.xsl = <<EOXSL
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
<xsl:output encoding="UTF-8" method="text" indent="no"/>
<xsl:template match="/">
EOXSL
if (@xpath2lang||"").length > 1 then
x.xsl << <<EOXSL
<xsl:if test="#{@xpath2lang}">
<xsl:value-of select="concat('%%LANG%%', #{@xpath2lang}, '%%
')"/>
</xsl:if>
EOXSL
end
x.xsl << <<EOXSL
<xsl:apply-templates/>
</xsl:template>
<xsl:template match="*">
<xsl:apply-templates select="@*"/>
<xsl:apply-templates/>
</xsl:template>
<xsl:template match="@*">
<xsl:value-of select="concat(' ',.,' ')"/>
</xsl:template>
</xsl:stylesheet>
EOXSL
x.xroot = @root
x.xml = @fname
x.process
if x.xerr and x.xerr["xmlErrLevel"] >= 3 then
raise x.xerr["xmlErrMsg"]
end
t = x.xres
if t =~ /^%%LANG%%([^%]+)%%/ then
l = $1
t = $'.strip
else
l = nil
end
t << @fname
[t.squeeze("\n"), l]
end
end
class DBFile
attr_reader :fid, :webname
def initialize(dbh, webname, localname)
@dbh = dbh
@webname = webname
@localname = localname
@row = @dbh.select_one("SELECT id,path,lang,timestamp,size FROM files where path = ?", webname)
if @row then
@fid = @row['id']
else
@fid = nil
end
end
def DBFile.remove(dbh, fid)
if fid then
dbh.do("delete from files where id=#{fid}")
end
end
def uptodate?
if @fid then
unless @row then
@row = @dbh.select_one("SELECT id,path,lang,timestamp,size FROM files where id=#{@fid}")
end
if (fstat=File.stat(@localname)) and @row then
@row['timestamp']==fstat.mtime.to_s and @row['size']==fstat.size
else
false
end
end
end
def update(blob, lang)
fstat=File.stat(@localname)
if @fid then
# update
sql = "update files set lang = ?, txt = ?, timestamp = ?, size = ? where id=#{@fid}"
@dbh.do(sql, lang, blob, fstat.mtime.to_s, fstat.size)
else
# insert new one
sql = "insert into files (path, lang, txt, timestamp, size) values (?, ?, ?, ?, ?)"
@dbh.do(sql, webname, lang, blob, fstat.mtime.to_s, fstat.size)
if id=@dbh.select_one("select last_insert_id()") then
@fid = id[0]
else
@fid = nil
end
end
end
end
class GSearch
attr_reader :dbh, :searchTxt, :searchResult
include Gorg
def initialize
@dbh = DBI.connect($Config['dbConnect'], $Config['dbUser'], $Config['dbPassword'])
@dbh['AutoCommit'] = true
end
def indexDir
wipe = false
scanDir { |webName, localName|
begin
dbf = GDig::DBFile.new(@dbh, webName, localName)
unless dbf.uptodate? then
gf = GFile.new($Config['root'], webName, $Config['xlang'])
blob = gf.txt
lang = gf.lang
if (lang||"").length < 1 then
# No lang attribute, see if we can use the filename
if $Config['flang'] and $Config['flang'].match(webName) then
lang = $Config['flang'].match(webName)[1]
end
end
dbf.update(blob, lang)
wipe = true
debug "#{Time.new.to_i} #{webName} indexed"
end
rescue Exception => e
error "Failed to index #{webName} : #{e.to_s}"
end
}
wipeSearches if wipe
end
def cleanup
# Remove files from db either because
# they should now be excluded or because they do not exist anymore
wipe = false
@dbh.select_all('select id, path from files') { |row|
if not fileMatch(row[1]) or not File.file?($Config['root']+row[1]) then
DBFile.remove(@dbh, row[0])
debug "GDig::GSearch: #{row[1]} removed"
wipe = true
end
}
wipeSearches if wipe
end
def do_CGI(cgi)
$Config["root"] = cgi.env_table['DOCUMENT_ROOT']||$Config["root"]
query = {}
# Get cookies
if $Config["acceptCookies"] then
# Add cookies to our params
query = cookies_to_params(cgi.cookies)
end
# Add URI params that are not used by search engine (p,q,l,s)
cgi.params.each{ |p, v| query[p] = v.to_s}
# Choose language
if cgi.has_key?("l") then
lang = cgi["l"]
elsif query.has_key?("SL") then
lang = query["SL"]
else
lang = nil
end
# Perform search
search(cgi["q"], lang)
if cgi.has_key?("p") and cgi["p"] =~ /^[0-9]{1,5}$/ then
p = cgi["p"].to_i
else
p = 1
end
if cgi.has_key?("s") and cgi["s"] =~ /^[0-9]{2,3}$/ then
s = cgi["s"].to_i
elsif query.has_key?("PL") and query["PL"] =~ /^[0-9]{2,3}$/ then
s = query["PL"].to_i
else
s = 20
end
s = 120 if s > 120
xml = xmlResult(p,s)
header = {}; body = ""
if cgi.has_key?("passthru") and $Config["passthru"] then
header = {'type' => 'text/plain'}
body = xml
else
if $Config["linkParam"] then
query[$Config["linkParam"]] = cgi.script_name
end
if $Config["httphost"] then
# Add HTTP_HOST to stylesheet params
query["httphost"] = if $Config["httphost"][0] == '*' then
cgi.host||""
elsif $Config["httphost"].include?('*') then
$Config["httphost"][0]
elsif $Config["httphost"].include?(cgi.host) then
$Config["httphost"][0]
else
cgi.host
end
end
err, body, filelist, extra = xproc(xml, query, false)
if err["xmlErrLevel"] > 0 then
raise "#{err.collect{|e|e.join(':')}.join('<br/>')}"
end
cookies = makeCookies(extra)
ct = setContentType(body)
# Turn application/xhtml+xml into text/html if browser does not accept it
if cgi.accept !~ /application\/xhtml\+xml/ and ct =~ /application\/xhtml\+xml(.*)$/ then
header = {'type' => "text/html#{$1}"}
else
header = {'type' => ct}
end
# Add cookies to http header
if cookies then
header['cookie'] = cookies
end
end
# If client accepts gzip encoding and we support it, return gzipped file
if $Config["zipLevel"] > 0 and ( cgi.accept_encoding =~ /gzip(\s*;\s*q=([0-9\.]+))?/ and ($2||"1") != "0" ) then
body = gzip(body, $Config["zipLevel"])
header['Content-Encoding'] = "gzip"
header['Vary'] = "Accept-Encoding"
end
cgi.out(header){body}
rescue => ex
syserr = Gorg::Status::SysError.new
cgi.out('Status'=>syserr.errSts){syserr.html(ex)}
error("GSearch::do_CGI() failed: #{$!}")
end
def search(str, lang)
@searchTxt = str
@searchResult = nil
if (lang||"") == "" then
@searchLang = '%'
else
@searchLang = lang
end
if str =~ /(^|\s)(([+<)(>~-][^+<)(>~-]+)|([^+<)(>~-]+\*))(\s|$)/ then
@searchBool = "Y"
boolClause = "in boolean mode"
else
@searchBool = "N"
boolClause = ""
end
if @searchTxt.length > 0 then
@searchResult = loadSearch
unless @searchResult then
@searchResult = []
# Perform full text search
sql = <<EOSQL
select id, path, lang, match (txt) against ( ? ) as score
from files
where lang like ? and match (txt) against ( ? #{boolClause} )
order by score desc
EOSQL
@dbh.select_all(sql, @searchTxt, @searchLang, @searchTxt).each { |r| @searchResult << [r[0],r[1],r[2],r[3]] }
saveSearch
end
end
@searchResult
end
def xmlResult(page=1, pageLength=25)
# <search page="p" pages="n">
# <for>search string</for>
# <found link="/path/to/file.xml" lang="fr">
# blah blah <b>word2</b> bleh
# </found>
pageLength = 20 if pageLength < 1
xml = "<?xml version='1.0' encoding='UTF-8'?>\n\n"
if @searchResult and @searchResult.length >= 1 then
removeDeadFiles
nPages = @searchResult.length / pageLength #/
nPages += 1 unless 0 == @searchResult.length.modulo(pageLength)
page = nPages if page > nPages
page = 1 if page < 1
xml << "<search page='#{page}' pages='#{nPages}' pageLength='#{pageLength}' lang='#{xmlEscape(@searchLang)}' bool='#{@searchBool}'>\n"
xml << xmlSearchFor
@searchResult[(page-1)*pageLength..page*pageLength-1].each { |r|
xml << " <found link='#{r[1]}' lang='#{r[2]}' score='#{r[3]}'>\n"
xml << xmlBlobSample(r[0]) << "\n"
xml << " </found>\n"
}
else
xml << "<search page='0' pages='0'>\n"
xml << xmlSearchFor
end
xml << "</search>\n"
end
def scanDir
Dir.chdir($Config['root']) {
`find -L . -type f`.split("\n").each{ |localFile|
if File.file?(localFile) then
webFile = localFile[1..-1]
if fileMatch(webFile) then
yield [webFile, File.expand_path(localFile)]
end
end
}
}
end
private
def xmlBlobSample(fileID)
blob = ""
r = @dbh.select_one("select txt from files where id = #{fileID}")
if r then
blob = r[0]
# Find first matching word and extract some text around it
stxt = @searchTxt.tr('`.,\'"\-_+~<>/?;:[]{}+|\\)(*&^%\$\#@!', ' ').split(' ')
regs = stxt.collect { |w| Regexp.new(w, true, 'U') }
ix = nil
regs.each { |r| break if ix=blob.index(r) }
if ix then
if ix < 80 then
x = 0
else
x = blob[0,ix-60].rindex(/[ ,\.]/)
x = 0 unless x
end
y = blob.index(/[,\. ]/, ix+80)
y = -1 unless y
blob = xmlEscape(blob[x..y])
# Mark up sought words
regs.each { |r| blob.gsub!(r){|t| "<b>#{t}</b>"} }
else
x = blob[120..-1].index(/[ ,\.]/)
blob = xmlEscape(blob[0..x])
end
end
blob
end
def xmlEscape(str)
if str
str.gsub('&','&').gsub('>','>').gsub('<','<')
else
"w00t"
end
end
def loadSearch
if @searchTxt then
r = @dbh.select_one("select result from savedsearches where words = ? and lang = ? and bool = ?", @searchTxt, @searchLang, @searchBool)
if r then
YAML::load(r[0])
end
end
end
def saveSearch
if @searchTxt then
@dbh.do("delete from savedsearches where words = ? and lang = ? and bool = ?", @searchTxt, @searchLang, @searchBool)
@dbh.do("insert into savedsearches (words, lang, bool, result) values(?, ?, ?, ?)", @searchTxt, @searchLang, @searchBool, @searchResult.to_yaml)
end
end
def wipeSearches
@dbh.do("delete from savedsearches")
end
def fileMatch(f)
$Config['in/out'].each { |inout|
return inout[0] if inout[1].match(f)
}
false
end
def removeDeadFiles
if @searchResult then
@searchResult.reject!{ |r| not File.file?($Config['root']+r[1]) }
end
end
def xmlSearchFor
" <for>#{xmlEscape(@searchTxt)}</for>\n" if @searchTxt
end
end
end
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