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PHP大文件及斷點(diǎn)續(xù)傳下載實(shí)現(xiàn)代碼

更新時(shí)間：2020年08月18日 10:06:56 作者：松鼠的博客

這篇文章主要介紹了PHP大文件及斷點(diǎn)續(xù)傳下載實(shí)現(xiàn)代碼,文中通過(guò)示例代碼介紹的非常詳細(xì)，對(duì)大家的學(xué)習(xí)或者工作具有一定的參考學(xué)習(xí)價(jià)值,需要的朋友可以參考下

一般來(lái)說(shuō)瀏覽器要同時(shí)下載幾個(gè)文件，比如pdf文件，會(huì)在服務(wù)器端把幾個(gè)文件壓縮成一個(gè)文件。但是導(dǎo)致的問(wèn)題就是會(huì)消耗服務(wù)器的cpu和io資源。

那有沒(méi)有辦法，用戶點(diǎn)了幾個(gè)文件，在客戶端同時(shí)下載呢？支持html5的瀏覽器是可以的，html的a標(biāo)簽有一個(gè)屬性download

<a download="下載的1.pdf" href="1.pdf" rel="external nofollow" rel="external nofollow" >單個(gè)文件下載</a>, 經(jīng)過(guò)測(cè)試在edge瀏覽器，firefox和chrome都支持。但是遺憾的是ie瀏覽器不支持。參考下面的例子。

<!DOCTYPE html>

<html>

<head>

	<meta charset="utf-8">

	<meta http-equiv="X-UA-Compatible" content="IE=Edge,chrome=1">

	<title></title>

	<script src="http://libs.baidu.com/jquery/1.11.1/jquery.min.js"></script>

</head>

<body>

	<input type="button" class="downloadAll"
	value="批量下載" />

	<script>
		var filesForDownload = [];
		filesForDownload[filesForDownload.length] = {
			path: "1.zip", //要下載的文件路徑
			name: "file1.txt" //下載后要顯示的名稱
		};
		filesForDownload[filesForDownload.length] = {
			path: "2.zip",
			name: "file2.txt"
		};
		filesForDownload[filesForDownload.length] = {
			path: "3.zip",
			name: "file3.txt"
		};

		function download(obj) {
			var temporaryDownloadLink =
				document.createElement("a");
			temporaryDownloadLink.style.display =
				'none';
			document.body.appendChild(
				temporaryDownloadLink);
			temporaryDownloadLink.setAttribute(
				'href', obj.path);
			temporaryDownloadLink.setAttribute(
				'download', obj.name);
			temporaryDownloadLink.click();
			document.body.removeChild(
				temporaryDownloadLink);
		}
		$('input.downloadAll').click(function(
			e) {
			e.preventDefault();
			for (var x in filesForDownload) {
				download(filesForDownload[x]);
			}
		});
	</script>

</body>

</html>

ie瀏覽器怎么辦呢？ 也可以用window.open函數(shù)。

<!DOCTYPE html>

<html>

<head>

	<meta charset="utf-8">

	<title></title>

	<script src="http://libs.baidu.com/jquery/1.11.1/jquery.min.js"></script>

</head>

<body>

	<a download="下載的1.pdf" href="1.pdf" rel="external nofollow" rel="external nofollow" >單個(gè)文件下載</a>
	<br>

	<a href="#" rel="external nofollow" class="yourlink">下載全部文件</a>

	<script>
		$('a.yourlink').click(function(e) {
			e.preventDefault();
			window.open('1.zip', 'download');
			window.open('2.zip', 'download');
			window.open('3.zip', 'download');
		});
	</script>
</body>
</html>

完整的方案就是根據(jù)瀏覽器類型，調(diào)用不同的函數(shù)，實(shí)現(xiàn)。

另外要下載pdf，而不是在瀏覽器中打開(kāi)的話，需要配置apache的配置文件，在httpd.conf中增加下面的配置。

<FilesMatch "\.pdf$">

Header set Content-Disposition attachment

</FilesMatch>

或者使用down2組件，下載更簡(jiǎn)單。

JavaScript：

引入頭

<head>

	<metahttp-equiv="Content-Type" content="text/html; charset=utf-8"
	/>

	<title>donw2-多文件演示頁(yè)面</title>

	<linktype="text/css" href="js/down.css" rel="external nofollow" rel="Stylesheet"
	/>

	<scripttype="text/javascript" src="js/jquery-1.4.min.js">
		</script>

		<scripttype="text/javascript" src="js/down.app.js"
		charset="utf-8">
			</script>

			<scripttype="text/javascript" src="js/down.edge.js"
			charset="utf-8">
				</script>

				<scripttype="text/javascript" src="js/down.file.js"
				charset="utf-8">
					</script>

					<scripttype="text/javascript" src="js/down.folder.js"
					charset="utf-8">
						</script>

						<scripttype="text/javascript" src="js/down.js"
						charset="utf-8">
							</script>

</head>

創(chuàng)建down2對(duì)象

var downer = new DownloaderMgr();
downer.Config["Folder"] = ""; //設(shè)置默認(rèn)下載路徑。
//掛載事件
downer.event.taskCreate = function(obj) {
	$(document.body).append("文件ID：" + obj
		.fileSvr.id) + "<br/>";
};
downer.event.downProcess = function(obj) {};
downer.event.downStoped = function(obj) {};
downer.event.downComplete = function(
	obj) {
	$(document.body).append('<div>本地路徑：' +
		obj.fileSvr.pathLoc + '</div>');
};
downer.event.downError = function(obj,
	err) {};
downer.event.queueComplete = function() {
	$(document.body).append(
		"<div>隊(duì)列完成</div>");
};

批量下載url

$("#btn-down-files").click(function() {
	if (downer.Config["Folder"] == "") {
		downer.open_folder();
		return;
	}
	var urls = [
		{
			fileUrl: "http://res2.ncmem.com/res/images/ie11.png"
		}
		, {
			fileUrl: "http://res2.ncmem.com/res/images/up6.1/down.png"
		}
		, {
			fileUrl: "http://res2.ncmem.com/res/images/firefox.png"
		}
		, {
			fileUrl: "http://res2.ncmem.com/res/images/edge.png"
		}
		, {
			fileUrl: "http://res2.ncmem.com/res/images/up6.1/cloud.png"
		}
		, {
			fileUrl: "http://res2.ncmem.com/res/images/home/w.png"
		}
		, {
			fileUrl: "http://res2.ncmem.com/res/images/img.png"
		}
	];
	downer.app.addUrls(urls);
});

當(dāng)成一個(gè)文件夾下載

$("#btn-down-json").click(function() {
	if (downer.Config["Folder"] == "") {
		downer.open_folder();
		return;
	}
	var fd = {
		nameLoc: "圖片列表"
		,
		files: [
			{
				fileUrl: "http://res2.ncmem.com/res/images/ie11.png"
			}
			, {
				fileUrl: "http://res2.ncmem.com/res/images/up6.1/down.png"
			}
			, {
				fileUrl: "http://res2.ncmem.com/res/images/firefox.png"
			}
			, {
				fileUrl: "http://res2.ncmem.com/res/images/edge.png"
			}
			, {
				fileUrl: "http://res2.ncmem.com/res/images/up6.1/cloud.png"
			}
			, {
				fileUrl: "http://res2.ncmem.com/res/images/home/w.png"
			}
			, {
				fileUrl: "http://res2.ncmem.com/res/images/img.png"
			}
		]
	};
	downer.app.addJson(fd);
});

下載多級(jí)目錄

$("#btn-down-fd").click(function() {
	if (downer.Config["Folder"] == "") {
		downer.open_folder();
		return;
	}
	var fd = {
		nameLoc: "測(cè)試文件夾"
		,
		files: [
			{
				fileUrl: "http://www.ncmem.com/images/ico-ftp.jpg"
			}
			, {
				fileUrl: "http://www.ncmem.com/images/ico-up.jpg"
			}
		]
		,
		folders: [
			{
				nameLoc: "圖片1"
				,
				files: [
					{
						fileUrl: "http://www.ncmem.com/images/ico-ftp.jpg"
					}
					, {
						fileUrl: "http://www.ncmem.com/images/ico-up.jpg"
					}
					, {
						fileUrl: "http://www.ncmem.com/images/ico-capture.jpg"
					}
					, {
						fileUrl: "http://www.ncmem.com/images/ico-imageuploader.gif"
					}
					, {
						fileUrl: "http://www.ncmem.com/images/ico-wordpaster.gif"
					}
				]
				,
				folders: [
					{
						nameLoc: "軟件"
						,
						files: [
							{
								fileUrl: "http://res2.ncmem.com/res/images/edit-file.png"
							}
						]
					}
				]
			}
		]
	};
	downer.app.addJson(fd);
});

自定義下載文件名稱

$("#btn-down-svr").click(function () {
  if (downer.Config["Folder"] == "") { downer.open_folder(); return; }
  var urls = [
    { fileUrl: "http://localhost:90/db/down.aspx", nameLoc: "test.exe" }
    , { fileUrl: "http://localhost:90/db/down.aspx", nameLoc: "test-1.exe" }
  ];
  downer.app.addUrls(urls);
});

實(shí)現(xiàn)效果：