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( 0, {
  30                                         type : jsonString ? X.Event.SUCCESS : X.Event.ERROR,
  31                                         data : 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         // numonLoad
  56
  57         if( X_UA.Opera ){
  58                 html = [
  59                         ( window[ 'JSON' ] ? '' : '<script src="' + json2Path + '"></script>' ),
  60                         '<script>',
  61                                 'onunload=function(){im.onload=im.onerror=""};',
  62                                 'nw=+new Date;',
  63                                 'function cb(o){if(nw){nw-=+new Date;parent.X.Net.JSONP.cb(' + X_NET_JSONP_ACCESS_KEY + ',JSON.stringify(o),-nw);nw=0}}',
  64                         '</script>',
  65                         '<script id="jp"></script>',
  66                         '<img id="im" src="', url, '" onload="jp.src=im.src" onerror="jp.src=im.src">'
  67                 ];
  68                 X_Net_JSONP_onloadCount = 2;
  69         } else
  70         if( X_UA.IE8 ){
  71                 html = [
  72                         // http://blog.livedoor.jp/dankogai/archives/51503830.html
  73                         // Ajax - IE8にもJSON入ってます。使えるとは限らないけど
  74                         // 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
  75                         '<script id="jp"></script>',
  76                         '<script>',
  77                                 'onunload=function(){clearTimeout(id)};',
  78                                 'nw=0;', // なぜか必要,,,
  79                                 'function cb(o){nw-=+new Date;parent.X.Net.JSONP.cb(' + X_NET_JSONP_ACCESS_KEY + ',parent.JSON.stringify(o),-nw)}',
  80                                 'function tm(){jp.src="', url ,'";nw=+new Date}',
  81                                 'id=setTimeout(tm,16);',
  82                         '</script>'
  83
  84                         /*　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
  85                         '<script>',
  86                                 'function cb(o){window.parent.X.Net.JSONP.cb(' + X_NET_JSONP_ACCESS_KEY + ',window.parent.JSON.stringify(o))}',
  87                         '</script>',
  88                         '<script src="', url, '"></script>' */
  89                 ];
  90                 X_Net_JSONP_onloadCount = 2;
  91         } else
  92         if( X_UA.IE9 ){
  93                 html = [
  94                         '<script id="jp"></script>',
  95                         '<script>',
  96                                 'onunload=function(){clearTimeout(id)};',
  97                                 'function cb(o){nw-=+new Date;parent.X.Net.JSONP.cb(' + X_NET_JSONP_ACCESS_KEY + ',JSON.stringify(o),-nw)}',
  98                                 'function tm(){jp.src="', url ,'";nw=+new Date}',
  99                                 'id=setTimeout(tm,16);',
 100                         '</script>'
 101                 ];
 102                 X_Net_JSONP_onloadCount = 2;
 103         } else
 104         if( window[ 'JSON' ] ){
 105                 html = [
 106                         '<script>',
 107                                 'nw=+new Date;',
 108                                 'function cb(o){if(nw){nw-=+new Date;parent.X.Net.JSONP.cb(' + X_NET_JSONP_ACCESS_KEY + ',JSON.stringify(o),-nw);nw=0}}',
 109                         '</script>',
 110                         '<script src="', url, '"></script>'
 111                 ];
 112                 X_Net_JSONP_onloadCount = 1;
 113         } else
 114         if( X_UA.IE4 || X_UA.MacIE ){
 115                 html = [
 116                         '<script id="jn"></script>',
 117                         '<script id="jp"></script>',
 118                         '<script>',
 119                                 'onunload=function(){clearTimeout(id)};',
 120                                 'function cb(o){nw-=new Date;parent.X.Net.JSONP.cb(' + X_NET_JSONP_ACCESS_KEY + ',JSON.stringify(o),-nw-16,', json2FileSize, ')}',
 121                                 'function t1(){document.all.jn.src="', json2Path ,'";id=setTimeout("t2()",16);nw=+new Date}',
 122                                 'id=setTimeout("t1()",16);',
 123                                 'function t2(){if(window.JSON){document.all.jp.src="', url ,'"}else{id=setTimeout("t2()",16)}}',
 124                         '</script>'
 125                 ];
 126                 X_Net_JSONP_onloadCount = 3;
 127         } else
 128         if( X_UA.IE < 8 ){ // ie5-7
 129                 html = [
 130                         '<script id="jn"></script>',
 131                         '<script id="jp"></script>',
 132                         '<script>',
 133                                 'onunload=function(){clearTimeout(id)};',
 134                                 'function cb(o){nw-=new Date;parent.X.Net.JSONP.cb(' + X_NET_JSONP_ACCESS_KEY + ',JSON.stringify(o),-nw-16,', json2FileSize, ')}',
 135                                 'function t1(){jn.src="', json2Path ,'";id=setTimeout(t2,16);nw=+new Date}',
 136                                 'id=setTimeout(t1,16);',
 137                                 'function t2(){if(window.JSON){jp.src="', url ,'"}else{id=setTimeout(t2,16)}}',
 138                         '</script>'
 139                 ];
 140                 X_Net_JSONP_onloadCount = 3;
 141         } else {
 142                 html = [
 143                         '<script>',
 144                                 '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}}',
 145                                 'nw=+new Date;',
 146                         '</script>',
 147                         '<script src="', json2Path, '"></script>',
 148                         '<script src="', url, '"></script>'
 149                 ];
 150                 X_Net_JSONP_onloadCount = 1;
 151         };
 152
 153         X_NET_JSONP_NinjaIframe
 154                 .refresh( html.join( '' ) )
 155                 .listen( [ X.Event.SUCCESS, X.Event.ERROR ], X_NET_JSONPWrapper, X_NET_JSONP_iframeListener );
 156 };
 157
 158
 159 function X_NET_JSONP_iframeListener( e ){
 160         switch( e.type ){
 161                 case X.Event.SUCCESS :
 162                         console.log( 'iframe onload, but' );
 163                         if( ++X_NET_JSONPWrapper._onloadCount < X_Net_JSONP_onloadCount ) return;
 164                         // TODO callback が無ければ error
 165                         X_NET_JSONPWrapper.asyncDispatch( 1000, X.Event.ERROR );
 166                         break;
 167                 case X.Event.ERROR :
 168                         console.log( 'iframe onerror' );
 169                         X_NET_JSONPWrapper.asyncDispatch( X.Event.ERROR );
 170                         break;
 171         };
 172         X_NET_JSONP_NinjaIframe.unlisten();
 173         return X.Callback.UN_LISTEN;
 174 };
 175
 176
 177 X_NET_JSONPWrapper = X_Class_override(
 178         new X.EventDispatcher(),
 179         {
 180
 181                 _busy         : false,
 182                 _canceled     : false,
 183                 _onloadCount  : 0,
 184
 185                 load : function( url, data, timeout ){
 186                         //createURL
 187                         X_NET_JSONP_loadScriptInNinjaIframe( url );
 188
 189                         this._busy = true;
 190                 },
 191
 192                 cancel : function(){
 193                         this._canceled = true;
 194                 },
 195
 196                 reset : function(){
 197                         this._busy = this._canceled = false;
 198                         this._onloadCount = 0;
 199                 }
 200         }
 201 );