0.6.x/js/06_net/02_XNetJSONP.js

   1 /*
   2  * Operaでも非同期リクエストが並列処理できる img-JSONP
   3  * http://developer.cybozu.co.jp/takesako/2007/06/opera_img-jsonp.html
   4  *
   5  * iframe を使った jsonp の読み込みエラー判定の記事、
   6  * JSONPのエラーを判断する は web archive でも観れない
   7  * http://d.hatena.ne.jp/yuushimizu/20090128/1233146321
   8  * TODO JSONPの動的取得+エラー処理
   9  * http://d.hatena.ne.jp/NeoCat/20110206/1296934235
  10  *
  11  * Safari が JavaScript ファイルを動的ロードできない件
  12  * http://www.bricklife.com/weblog/000618.html
  13  *
  14  * IE9でiframe内で遷移した場合window.parentのメソッドを呼べない
  15  * http://kozo002.blogspot.jp/2012/07/ie9iframewindowparent.html
  16  *
  17  * IE6(IETester,localhost) で動かない,
  18  *
  19  * TODO postMessage
  20  */
  21
  22 X.Net.JSONP = {
  23         cb : function( accessKey, jsonString, time, opt_json2FileSize ){
  24                         if( accessKey !== X_NET_JSONP_ACCESS_KEY || !X_NET_JSONPWrapper._busy ) return;
  25
  26                         X_NET_JSONPWrapper._busy = false;
  27
  28                         X_NET_JSONPWrapper
  29                                 .asyncDispatch( {
  30                                         type : jsonString ? X.Event.SUCCESS : X.Event.ERROR,
  31                                         data : jsonString //window.JSON ? JSON.parse( jsonString ) : eval( jsonString )
  32                                 } );
  33
  34                         console.log( 'ms : ' + time + ' speed : ' + ( ( jsonString.length + ( opt_json2FileSize || 0 ) ) / time * 1000 ) + ' バイト/秒.' );
  35                 }
  36 };
  37
  38 var X_NET_JSONP_ACCESS_KEY = Math.random(),
  39
  40         X_NET_JSONP_NinjaIframe,
  41
  42         X_Net_JSONP_onloadCount;
  43
  44
  45 function X_NET_JSONP_loadScriptInNinjaIframe( url ){
  46         var json2Path     = 'js/libs/json2.js',
  47                 json2FileSize = 18103,
  48                 html;
  49
  50         X_NET_JSONP_NinjaIframe || ( X_NET_JSONP_NinjaIframe = new X.Util.NinjaIframe() );
  51
  52         // TODO '<scr'+'ipt> 化　恐らくアンチウイルスソフトが反応しないための対策
  53         // TODO postMessage の利用
  54
  55         if( X_UA.Opera ){
  56                 html = [
  57                         ( window[ 'JSON' ] ? '' : '<script src="' + json2Path + '"></script>' ),
  58                         '<script>',
  59                                 'onunload=function(){im.onload=im.onerror=""};',
  60                                 'nw=+new Date;',
  61                                 'function cb(o){if(nw){nw-=+new Date;parent.X.Net.JSONP.cb(' + X_NET_JSONP_ACCESS_KEY + ',JSON.stringify(o),-nw', window[ 'JSON' ] ? json2FileSize : 0 ,');nw=0}}',
  62                         '</script>',
  63                         '<script id="jp"></script>',
  64                         '<img id="im" src="', url, '" onload="jp.src=im.src" onerror="jp.src=im.src">'
  65                 ];
  66                 X_Net_JSONP_onloadCount = 2;
  67         } else
  68         if( X_UA.IE8 ){
  69                 html = [
  70                         // JavaScriptでunicode文字列をunescapeする
  71                         // http://perutago.seesaa.net/article/202801583.html
  72
  73                         // http://blog.livedoor.jp/dankogai/archives/51503830.html
  74                         // Ajax - IE8にもJSON入ってます。使えるとは限らないけど
  75                         // Compatibility mode (別名Quirks mode) では、JSONオブジェクトは無効になります。iframeもだめです
  76                         '<script id="jp"></script>',
  77                         '<script>',
  78                                 'onunload=function(){clearTimeout(id)};',
  79                                 'nw=0;', // なぜか必要,,,
  80                                 'function cb(o){nw-=+new Date;parent.X.Net.JSONP.cb(' + X_NET_JSONP_ACCESS_KEY + ',parent.JSON.stringify(o).replace(/\\\\u([a-fA-F0-9]{4})/g,function(a,b){return String.fromCharCode(parseInt(b,16))}),-nw)}',
  81                                 'function tm(){jp.src="', url ,'";nw=+new Date}',
  82                                 'id=setTimeout(tm,16);',
  83                         '</script>'
  84
  85                         /*　以下のコードは XP ie8 では動くけど、win8 IE11(8モード)で動かない 開発の便宜を取って,setTimeout を挟む
  86                         '<script>',
  87                                 'function cb(o){window.parent.X.Net.JSONP.cb(' + X_NET_JSONP_ACCESS_KEY + ',window.parent.JSON.stringify(o))}',
  88                         '</script>',
  89                         '<script src="', url, '"></script>' */
  90                 ];
  91                 X_Net_JSONP_onloadCount = 2;
  92         } else
  93         if( X_UA.IE9 ){
  94                 html = [
  95                         '<script id="jp"></script>',
  96                         '<script>',
  97                                 'onunload=function(){clearTimeout(id)};',
  98                                 'function cb(o){nw-=+new Date;parent.X.Net.JSONP.cb(' + X_NET_JSONP_ACCESS_KEY + ',JSON.stringify(o),-nw)}',
  99                                 'function tm(){jp.src="', url ,'";nw=+new Date}',
 100                                 'id=setTimeout(tm,16);',
 101                         '</script>'
 102                 ];
 103                 X_Net_JSONP_onloadCount = 2;
 104         } else
 105         if( window[ 'JSON' ] ){
 106                 html = [
 107                         '<script>',
 108                                 'nw=+new Date;',
 109                                 'function cb(o){if(nw){nw-=+new Date;parent.X.Net.JSONP.cb(' + X_NET_JSONP_ACCESS_KEY + ',JSON.stringify(o),-nw);nw=0}}',
 110                         '</script>',
 111                         '<script src="', url, '"></script>'
 112                 ];
 113                 X_Net_JSONP_onloadCount = 1;
 114         } else
 115         if( X_UA.IE4 || X_UA.MacIE ){
 116                 html = [
 117                         '<script id="jn"></script>',
 118                         '<script id="jp"></script>',
 119                         '<script>',
 120                                 'onunload=function(){clearTimeout(id)};',
 121                                 'function cb(o){nw-=new Date;parent.X.Net.JSONP.cb(' + X_NET_JSONP_ACCESS_KEY + ',JSON.stringify(o),-nw-16,', json2FileSize, ')}',
 122                                 'function t1(){document.all.jn.src="', json2Path ,'";id=setTimeout("t2()",16);nw=+new Date}',
 123                                 'id=setTimeout("t1()",16);',
 124                                 'function t2(){if(window.JSON){document.all.jp.src="', url ,'"}else{id=setTimeout("t2()",16)}}',
 125                         '</script>'
 126                 ];
 127                 X_Net_JSONP_onloadCount = 3;
 128         } else
 129         if( X_UA.IE < 8 ){ // ie5-7
 130                 html = [
 131                         '<script id="jn"></script>',
 132                         '<script id="jp"></script>',
 133                         '<script>',
 134                                 'onunload=function(){clearTimeout(id)};',
 135                                 'function cb(o){nw-=new Date;parent.X.Net.JSONP.cb(' + X_NET_JSONP_ACCESS_KEY + ',JSON.stringify(o),-nw-16,', json2FileSize, ')}',
 136                                 'function t1(){jn.src="', json2Path ,'";id=setTimeout(t2,16);nw=+new Date}',
 137                                 'id=setTimeout(t1,16);',
 138                                 'function t2(){if(window.JSON){jp.src="', url ,'"}else{id=setTimeout(t2,16)}}',
 139                         '</script>'
 140                 ];
 141                 X_Net_JSONP_onloadCount = 3;
 142         } else {
 143                 html = [
 144                         '<script>',
 145                                 'function cb(o){if(nw){nw-=new Date;parent.X.Net.JSONP.cb(' + X_NET_JSONP_ACCESS_KEY + ',JSON.stringify(o),-nw,', json2FileSize, ');nw=0}}',
 146                                 'nw=+new Date;',
 147                         '</script>',
 148                         '<script src="', json2Path, '"></script>',
 149                         '<script src="', url, '"></script>'
 150                 ];
 151                 X_Net_JSONP_onloadCount = 1;
 152         };
 153
 154         X_NET_JSONP_NinjaIframe
 155                 .refresh( html.join( '' ) )
 156                 .listen( [ X.Event.SUCCESS, X.Event.ERROR ], X_NET_JSONPWrapper, X_NET_JSONP_iframeListener );
 157 };
 158
 159
 160 function X_NET_JSONP_iframeListener( e ){
 161         switch( e.type ){
 162                 case X.Event.SUCCESS :
 163                         console.log( 'iframe onload, but' );
 164                         if( ++X_NET_JSONPWrapper._onloadCount < X_Net_JSONP_onloadCount ) return;
 165                         // TODO callback が無ければ error
 166                         X_NET_JSONPWrapper.asyncDispatch( 1000, X.Event.ERROR );
 167                         break;
 168                 case X.Event.ERROR :
 169                         console.log( 'iframe onerror' );
 170                         X_NET_JSONPWrapper.asyncDispatch( X.Event.ERROR );
 171                         break;
 172         };
 173         X_NET_JSONP_NinjaIframe.unlisten();
 174         return X.Callback.UN_LISTEN;
 175 };
 176
 177
 178 X_NET_JSONPWrapper = X_Class_override(
 179         new X.EventDispatcher(),
 180         {
 181
 182                 _busy         : false,
 183                 _canceled     : false,
 184                 _onloadCount  : 0,
 185
 186                 load : function( url, data, timeout ){
 187                         //createURL
 188                         X_NET_JSONP_loadScriptInNinjaIframe( url );
 189
 190                         this._busy = true;
 191                 },
 192
 193                 cancel : function(){
 194                         this._canceled = true;
 195                 },
 196
 197                 reset : function(){
 198                         this._busy = this._canceled = false;
 199                         this._onloadCount = 0;
 200                 }
 201         }
 202 );