tDiaryのdisp_referrerプラグインで、検索結果からのリンクの場合にキーワードを抽出する機能がある。URLの中にあるエンコードされた文字列を取り出すというものだが、次のようにURLがネストしている場合の指定が困難だった。
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http://images.google.co.jp/imgres?imgurl=http://d.akinori.org/images/20041116_0.jpg&imgrefurl=http://d.akinori.org/%3Fdate%3D20041116&h=320&w=240&sz=27&hl=ja&start=79&um=1&tbnid=KRQt9Qd57q_uNM:&tbnh=118&tbnw=89&prev=/images%3Fq%3Dkinesis%26start%3D60%26ndsp%3D20%26svnum%3D10%26um%3D1%26hl%3Dja%26lr%3Dlang_ja%26c2coff%3D1%26safe%3Doff%26client%3Dfirefox%26rls%3Dorg.mozilla:ja:official%26sa%3DN |
そこで、できるようにハックしてみましたよ。"prev>q"で「prevの中のq」という指定になる。
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Index: disp_referrer.rb =================================================================== --- disp_referrer.rb (revision 80) +++ disp_referrer.rb (working copy) @@ -753,18 +753,17 @@ title = nil keyword = nil cached_url = nil - values = query ? DispRef2String::parse_query( query ) : nil catch( :done ) do - setup['search_engines'][engine].each do |e| - if( e[0] =~ urlbase ) then - title = eval( e[1] ) + setup['search_engines'][engine].each do |re_url, title, keys, cache| + if( re_url =~ urlbase ) then + title = eval( title ) throw :done if keyword - if e[2].empty? then + if keys.empty? then keyword = setup['search.unknown_keyword'] throw :done end - if String == e[2].class then - k, c = (query ? query : @url ).instance_eval( e[2] ) + if String == keys.class then + k, c = (query ? query : @url ).instance_eval( keys ) if k then keyword = k else @@ -773,15 +772,16 @@ cached_url = c ? c : nil throw :done else # should be an Array usually - if not values then - keyword = setup['search.unknown_keyword'] - throw :done - end - e[2].each do |k| - if( values[k] and not values[k][0].empty? ) then - unless( e[3] and e[3] =~ values[k][0] ) then + keys.each do |kpath| + value = nil + unless( kpath.split( '>' ).inject( query ) { |q, k| + value, = DispRef2String::parse_query( q.sub( /.*?\?/, '' ) )[k] + break nil if value.nil? + setup.to_native( DispRef2String::unescape( value ) ) + }.nil? ) then + unless( cache and cache =~ value ) then cached_url = nil - keyword = values[k][0] + keyword = value throw :done else cached_url = $1 @@ -789,6 +789,10 @@ throw :done end end + end + if( keyword.nil? ) then + keyword = setup['search.unknown_keyword'] + throw :done end end end Index: ja/disp_referrer.rb =================================================================== --- ja/disp_referrer.rb (revision 82) +++ ja/disp_referrer.rb (working copy) @@ -445,7 +445,8 @@ [%r{\Ahttp://.*?\bgoogle\.([^/]+)/.*url}i, '".#{$1}のGoogleのURL検索?"', ['as_q', 'q'], DispReferrer2_Google_cache], [%r{\Ahttp://.*?\bgoogle/search}i, '"たぶんGoogle検索"', ['as_q', 'q'], DispReferrer2_Google_cache], [%r{\Ahttp://eval.google\.([^/]+)}i, '".#{$1}のGoogle Accounts"', [], nil], - [%r{\Ahttp://images\.google\.([^/]+)/(?:imgres|images)}i, '".#{$1}のGoogleイメージ検索"', ['q', 'imgurl'], DispReferrer2_Google_cache], + [%r{\Ahttp://images\.google\.([^/]+)/images}i, '".#{$1}のGoogleイメージ検索"', ['q'], DispReferrer2_Google_cache], + [%r{\Ahttp://images\.google\.([^/]+)/imgres}i, '".#{$1}のGoogleイメージ検索"', ['prev>q'], DispReferrer2_Google_cache], ], 'yahoo' => [ [%r{\Ahttp://[^/]+\.rd\.yahoo\.([^/]+)}i, '".#{$1}のYahooのリダイレクタ"', 'split(/\*/)[1]', nil], |
inject()のあたりがいまいちすっきりしないのは、デコード前の文字列を返す仕様になっているため。まあ、とりあえず動くからいいでしょう。
追記: queryはnilかもしれないので、以下の修正が必要です。
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Index: disp_referrer.rb =================================================================== --- disp_referrer.rb (revision 86) +++ disp_referrer.rb (working copy) @@ -774,7 +774,7 @@ else # should be an Array usually keys.each do |kpath| value = nil - unless( kpath.split( '>' ).inject( query ) { |q, k| + unless( kpath.split( '>' ).inject( query ? query : @url ) { |q, k| value, = DispRef2String::parse_query( q.sub( /.*?\?/, '' ) )[k] break nil if value.nil? setup.to_native( DispRef2String::unescape( value ) ) |
Thanks for sharing. I read many of your blog posts, cool, your blog is very good.
Reading your article helped me a lot and I agree with you. But I still have some doubts, can you clarify for me? I’ll keep an eye out for your answers.