Fat R笔记……与减肥无关

// ==UserScript==
// @name             Show Youtube flv URLs
// @author           Returner
// @include          http://*youtube.com/*
// ==/UserScript==

var autoLoad = false;   //用这个变量控制页面加载后是否调用loadAll()
vidCol = new Array();
urlCol = new Array();

function getURL(vid,sURL)  //读取并分析视频播放页面，获取flv URL
{
  var req = new XMLHttpRequest();
  if (req) {
    req.onreadystatechange = function() {
      if (req.readyState == 4) {
        if (req.status == 200) {
          if (document.getElementById(vid).innerHTML.indexOf('Retrieving')!=0)
            return; //如果Retrieving的时候Content Box的内容改变了，则不写回获得到的URL
          var res = req.responseText;
          var basei = res.indexOf('/watch_fullscreen?');
          if (basei>0){
            document.getElementById(vid).innerHTML = '<strong>Download flv</strong>';    
            document.getElementById(vid).href='http://www.youtube.com/get_video?' + 
              res.substring(basei+18,res.indexOf('&fs=1&title=', basei));
          }
          else
            alert('No video found');
        }else{
          document.getElementById(vid).innerHTML = 'Failed to get flv URL';
        }
      }
    };
    document.getElementById(vid).innerHTML = 'Retrieving flv URL...';
    req.open('GET', sURL);
    req.send(null);
  }
}

function loadAll()//获取页面中所有视频的flv标签(会造成同时请求多个页面)
{
  for (var i in vidCol)   getURL(vidCol[i],urlCol[i]);  
}

function addl()
{
  var links=document.links;
  var j = 0;  
  var indexHelp = -1;  
  if (!links.length) return;
  for (var i = 0, thisLink; thisLink = links[i]; i++){
    //忽略href=""的链接(一般都是有onclick属性的链接?)
    //忽略有onclick属性的链接
    //处理的URL必须是播放页面URL(http://.../watch?v=...)
    //忽略Play all videos链接
    //忽略图片链接
    if(String(thisLink) != location.href &&
       thisLink.getAttribute('onclick')==null &&
       String(thisLink).indexOf("&feature=PlayList") < 0 &&
       thisLink.innerHTML.indexOf("<IMG") < 0 &&
       String(thisLink).match(/^http\S+\/watch\?v/i)!= null
       ){
      var nextLink = links[i+1];      
      if(nextLink && !String(nextLink.getAttribute('id')).search(/^vid[0-9]+$/)){
        nextLink.outerHTML = nextLink.outerHTML.replace(/vid[0-9]+/g,'vid'+i);
      }else{
        var addHTML = '<br><a ID=vid'+i+' href="javascript:getURL(\''+'vid'+i+
          '\',\''+thisLink+'\')"><strong>Get flv URL</strong></a>';
        thisLink.insertAdjacentHTML("afterEnd",addHTML);//插入链接
      }
      urlCol[j] = thisLink;  //保存以供loadAll()使用
      vidCol[j++] = 'vid'+i;  //保存以供loadAll()使用
    } else if (indexHelp < 0 && String(thisLink).indexOf("/t/help_center") >= 0) {
      indexHelp = i;  //寻找页面顶部的Help链接
    } 
  }
  if(j==0) return;  //if no watch_url is found, exit
  //no need to use 'else' - that would be an extra command
  //and the earlier 'return' removes the need for 'else' here  
  if(indexHelp > 0){  //if the 'Help' link is found
    var addedLink = null;
    if (addedLink = document.getElementById('getAllflv')){
      addedLink.innerHTML = '<b>Retrieve all (' + j + ') flv URL'+(j>1?'s':'')+'</b>';
      //如果已有Retrieve all链接，则更新之
    }else{
      var helpLink = links[indexHelp];
      var strClass = helpLink.getAttribute('class');    
      if (strClass) strClass = 'class="'+strClass+'"';
      else strClass='';
      helpLink.insertAdjacentHTML("afterEnd",
        '<span id="flvSpan" class="utilDelim">|</span><a ' + strClass +
        ' href="javascript:loadAll()" id="getAllflv"><b>Retrieve all (' + j +
        ') flv URL'+(j>1?'s':'')+'</b></a>'
        );//在Help链接后面插入Retrieve all链接
    }
  }
  if(autoLoad)  loadAll();

}

//content box process
var htmlBak = new Array();    
  
function preShiftImage(bar_id){
  var IBrowser = imageBrowsers[bar_id];
  for (var i=0; i<IBrowser.display_array.length; i++)
    htmlBak[i] = document.getElementById("title1_" + IBrowser.root_div_id + "_" + i).innerHTML;
    //备份content box切换图片前的对应标题文字链接
}

function postShiftImage(bar_id){   
  var IBrowser = imageBrowsers[bar_id];  
  for (var i=0; i<IBrowser.display_array.length; i++){    
    var vid = htmlBak[i].match(/ID=\"?vid(\d+)/i)[1];
    if(!vid) continue;
    var newTitle = IBrowser.display_array[i].title1;
    var addHTML = '<br><a ID=vid'+vid+' href="javascript:getURL(\''+'vid'+vid+
      '\',\''+newTitle.match(/\/watch\?v[^\"\']+/i)+
      '\')"><strong>Get flv URL</strong></a>'; //更新vid
    document.getElementById("title1_" + 
      IBrowser.root_div_id + "_" + i).innerHTML = newTitle + addHTML;
      //在标题后重新添加Get flv URL链接
  }
}

function contentBoxProc()
{
  var imgsCB = document.images;
  var strClick;
  if (!imgsCB.length) return;
  for (var i = 0, thisIMG; thisIMG = imgsCB[i]; i++){
    if ((strClick = thisIMG.getAttribute('onclick')) &&
        strClick.indexOf('preShiftImage') == -1 ){        
        var idx = strClick.replace(/(;shift\S+(\(\S+\)))/i,
          ";preShiftImage$2$1;postShiftImage$2");
        thisIMG.setAttribute('onclick',idx); //在shiftImage()前后插入上面两个函数     
    }    
  }
}

//如果移植到Opera 8甚至其它浏览器，应该删掉监听DOMContentLoaded这段代码
  window.opera.addEventListener('AfterEvent.DOMContentLoaded',
    function (e) {
         addl();
         //contentBoxProc();
    },
    false);

  window.addEventListener('load',
    function (e) {      
         addl();
         contentBoxProc();
    },
    false);

javascript:getURL('vid#',LinkURL)

links[i].insertAdjacentHTML

innerHTML+="</a><br><a href=...>Get flv URL</a>"

document.getElementById('getAllflv')