关于最新版本listen1 (2.24.0)的修改心得(添加下载功能)

注：本文只作为技术交流

前言

再次感谢 listen1 的作者开发出如此强大的音乐播放器项目地址

效果图

首先照样更改 navigation.js文件

 // 下面是我改的
    $scope.download_music = (song) => {
      const strs =song.url.split('.'); // 字符分割
      const houzhui = strs[strs.length - 1].substring(0, 3);
      const filename = song.artist+" - "+song.title ;
      const x = new XMLHttpRequest();
      x.open("GET",song.url, true);
        x.responseType = 'blob';

      // eslint-disable-next-line no-undef
        x.onload=function(e){download(x.response, `${filename}.${houzhui}`);};
        x.send();
      };

    //

修改 html(添加下载标签)

在 html引入自己新建的js和css
更改文件是 listen1.html ,在 html 合适位置插入即可

//download.js v4.2, by dandavis; 2008-2016. [CCBY2] see http://danml.com/download.html for tests/usage
// v1 landed a FF+Chrome compat way of downloading strings to local un-named files, upgraded to use a hidden frame and optional mime
// v2 added named files via a[download], msSaveBlob, IE (10+) support, and window.URL support for larger+faster saves than dataURLs
// v3 added dataURL and Blob Input, bind-toggle arity, and legacy dataURL fallback was improved with force-download mime and base64 support. 3.1 improved safari handling.
// v4 adds AMD/UMD, commonjs, and plain browser support
// v4.1 adds url download capability via solo URL argument (same domain/CORS only)
// v4.2 adds semantic variable names, long (over 2MB) dataURL support, and hidden by default temp anchors
// https://github.com/rndme/download

function download(data, strFileName, strMimeType) {

		var self = window, // this script is only for browsers anyway...
			defaultMime = "application/octet-stream", // this default mime also triggers iframe downloads
			mimeType = strMimeType || defaultMime,
			payload = data,
			url = !strFileName && !strMimeType && payload,
			anchor = document.createElement("a"),
			toString = function(a){return String(a);},
			myBlob = (self.Blob || self.MozBlob || self.WebKitBlob || toString),
			fileName = strFileName || "download",
			blob,
			reader;
			myBlob= myBlob.call ? myBlob.bind(self) : Blob ;

		if(String(this)==="true"){ //reverse arguments, allowing download.bind(true, "text/xml", "export.xml") to act as a callback
			payload=[payload, mimeType];
			mimeType=payload[0];
			payload=payload[1];
		}


		if(url && url.length< 2048){ // if no filename and no mime, assume a url was passed as the only argument
			fileName = url.split("/").pop().split("?")[0];
			anchor.href = url; // assign href prop to temp anchor
		  	if(anchor.href.indexOf(url) !== -1){ // if the browser determines that it's a potentially valid url path:
        		var ajax=new XMLHttpRequest();
        		ajax.open( "GET", url, true);
        		ajax.responseType = 'blob';
        		ajax.onload= function(e){
				  download(e.target.response, fileName, defaultMime);
				};
        		setTimeout(function(){ ajax.send();}, 0); // allows setting custom ajax headers using the return:
			    return ajax;
			} // end if valid url?
		} // end if url?


		//go ahead and download dataURLs right away
		if(/^data\:[\w+\-]+\/[\w+\-]+[,;]/.test(payload)){

			if(payload.length > (1024*1024*1.999) && myBlob !== toString ){
				payload=dataUrlToBlob(payload);
				mimeType=payload.type || defaultMime;
			}else{
				return navigator.msSaveBlob ?  // IE10 can't do a[download], only Blobs:
					navigator.msSaveBlob(dataUrlToBlob(payload), fileName) :
					saver(payload) ; // everyone else can save dataURLs un-processed
			}

		}//end if dataURL passed?

		blob = payload instanceof myBlob ?
			payload :
			new myBlob([payload], {type: mimeType}) ;


		function dataUrlToBlob(strUrl) {
			var parts= strUrl.split(/[:;,]/),
			type= parts[1],
			decoder= parts[2] == "base64" ? atob : decodeURIComponent,
			binData= decoder( parts.pop() ),
			mx= binData.length,
			i= 0,
			uiArr= new Uint8Array(mx);

			for(i;i<mx;++i) uiArr[i]= binData.charCodeAt(i);

			return new myBlob([uiArr], {type: type});
		 }

		function saver(url, winMode){

			if ('download' in anchor) { //html5 A[download]
				anchor.href = url;
				anchor.setAttribute("download", fileName);
				anchor.className = "download-js-link";
				anchor.innerHTML = "downloading...";
				anchor.style.display = "none";
				document.body.appendChild(anchor);
				setTimeout(function() {
					anchor.click();
					document.body.removeChild(anchor);
					if(winMode===true){setTimeout(function(){ self.URL.revokeObjectURL(anchor.href);}, 250 );}
				}, 66);
				return true;
			}

			// handle non-a[download] safari as best we can:
			if(/(Version)\/(\d+)\.(\d+)(?:\.(\d+))?.*Safari\//.test(navigator.userAgent)) {
				url=url.replace(/^data:([\w\/\-\+]+)/, defaultMime);
				if(!window.open(url)){ // popup blocked, offer direct download:
					if(confirm("displaying New Document\n\nUse Save As... to download, then click back to return to this page.")){ location.href=url; }
				}
				return true;
			}

			//do iframe dataURL download (old ch+FF):
			var f = document.createElement("iframe");
			document.body.appendChild(f);

			if(!winMode){ // force a mime that will download:
				url="data:"+url.replace(/^data:([\w\/\-\+]+)/, defaultMime);
			}
			f.src=url;
			setTimeout(function(){ document.body.removeChild(f); }, 333);

		}//end saver




		if (navigator.msSaveBlob) { // IE10+ : (has Blob, but not a[download] or URL)
			return navigator.msSaveBlob(blob, fileName);
		}

		if(self.URL){ // simple fast and modern way using Blob and URL:
			saver(self.URL.createObjectURL(blob), true);
		}else{
			// handle non-Blob()+non-URL browsers:
			if(typeof blob === "string" || blob.constructor===toString ){
				try{
					return saver( "data:" +  mimeType   + ";base64,"  +  self.btoa(blob)  );
				}catch(y){
					return saver( "data:" +  mimeType   + "," + encodeURIComponent(blob)  );
				}
			}

			// Blob but not URL support:
			reader=new FileReader();
			reader.onload=function(e){
				saver(this.result);
			};
			reader.readAsDataURL(blob);
		}
		return true;
	}; /* end download() */

iconfont.css(显示下载图标)
iconfont.css文件内容:

@font-face {font-family: "iconfont";
  src: url('iconfont.eot?t=1558084334586'); /* IE9 */
  src: url('iconfont.eot?t=1558084334586#iefix') format('embedded-opentype'), /* IE6-IE8 */
  url('data:application/x-font-woff2;charset=utf-8;base64,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') format('woff2'),
  url('iconfont.woff?t=1558084334586') format('woff'),
  url('iconfont.ttf?t=1558084334586') format('truetype'), /* chrome, firefox, opera, Safari, Android, iOS 4.2+ */
  url('iconfont.svg?t=1558084334586#iconfont') format('svg'); /* iOS 4.1- */
}

.iconfont {
  font-family: "iconfont" !important;
  font-size: 16px;
  font-style: normal;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.icon-download:before {
  content: "\e682";
}

me.css文件内容:

#download_music{
cursor: pointer;
color: #7F7F7F;
margin-right: 3px;
}
#download_music:hover{
color: black;
}

到此大功告成!

关于最新版本listen1 (2.24.0)的修改心得(添加下载功能)

前言

效果图

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