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// 下载办法 download.js
function download(data, strFileName, strMimeType) {
var self = window, // this script is only for browsers anyway...
u = 'application/octet-stream', // this default mime also triggers iframe downloads
m = strMimeType || u,
x = data,
D = document,
a = D.createElement('a'),
z = function(a) {return String(a)
},
B = self.Blob || self.MozBlob || self.WebKitBlob || z,
BB = self.MSBlobBuilder || self.WebKitBlobBuilder || self.BlobBuilder,
fn = strFileName || 'download',
blob,
b,
ua,
fr
//if(typeof B.bind === 'function'){B=B.bind(self); }
if (String(this) === 'true') {//reverse arguments, allowing download.bind(true, "text/xml", "export.xml") to act as a callback
x = [x, m]
m = x[0]
x = x[1]
}
//go ahead and download dataURLs right away
if (String(x).match(/^data\:[\w+\-]+\/[\w+\-]+[,;]/)) {return navigator.msSaveBlob // IE10 can't do a
文件名称:
文件大小:
下载声明:本站部分资源来自于网络收集,若侵犯了你的隐私或版权,请及时联系我们删除有关信息。
下载地址:
, only Blobs:
? navigator.msSaveBlob(d2b(x), fn)
: saver(x) // everyone else can save dataURLs un-processed
} //end if dataURL passed?
try {blob = x instanceof B ? x : new B([ x], {type: m})
} catch (y) {if (BB) {b = new BB()
b.append([x])
blob = b.getBlob(m) // the blob
}
}
function d2b(u) {var p = u.split(/[:;,]/),
t = p[1],
dec = p[2] == 'base64' ? atob : decodeURIComponent,
bin = dec(p.pop()),
mx = bin.length,
i = 0,
uia = new Uint8Array(mx)
for (i; i < mx; ++i) uia[i] = bin.charCodeAt(i)
return new B([uia], {type: t})
}
function saver(url, winMode) {if ('download' in a) {//html5 A
文件名称:
文件大小:
下载声明:本站部分资源来自于网络收集,若侵犯了你的隐私或版权,请及时联系我们删除有关信息。
下载地址:
a.href = url
a.setAttribute('download', fn)
a.innerHTML = 'downloading...'
D.body.appendChild(a)
setTimeout(function() {a.click()
D.body.removeChild(a)
if (winMode === true) {setTimeout(function() {self.URL.revokeObjectURL(a.href)
}, 250)
}
}, 66)
return true
}
//do iframe dataURL download (old ch+FF):
var f = D.createElement('iframe')
D.body.appendChild(f)
if (!winMode) {
// force a mime that will download:
url = 'data:' + url.replace(/^data:([\w\/\-\+]+)/, u)
}
f.src = url
setTimeout(function() {D.body.removeChild(f)
}, 333)
} //end saver
if (navigator.msSaveBlob) {// IE10+ : (has Blob, but not a
文件名称:
文件大小:
下载声明:本站部分资源来自于网络收集,若侵犯了你的隐私或版权,请及时联系我们删除有关信息。
下载地址:
or URL)
return navigator.msSaveBlob(blob, fn)
}
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 === z) {
try {return saver('data:' + m + ';base64,' + self.btoa(blob))
} catch (y) {return saver('data:' + m + ',' + encodeURIComponent(blob))
}
}
// Blob but not URL:
fr = new FileReader()
fr.onload = function(e) {saver(this.result)
}
fr.readAsDataURL(blob)
}
return true
} /* end download() */
export default download
utils 引入
import download from './download'
/*
* 应用 download.js 强制浏览器下载图片、视频等文件
* @param {any} url url 链接地址
* @param {any} strFileName 文件名
* @param {any} strMimeType 文件类型
* dzl
* 2020 年 5 月 8 日
*/
export function downloadfile(url, strFileName, strMimeType) {
var xmlHttp = null
if (window.ActiveXObject) {
// IE6, IE5 浏览器执行代码
xmlHttp = new ActiveXObject('Microsoft.XMLHTTP')
}
else if (window.XMLHttpRequest) {
// IE7+, Firefox, Chrome, Opera, Safari 浏览器执行代码
xmlHttp = new XMLHttpRequest()}
//2. 如果实例化胜利,就调用 open()办法:if (xmlHttp != null) {xmlHttp.open('get', url, true)
xmlHttp.responseType = 'blob' // 要害
xmlHttp.send()
xmlHttp.onreadystatechange = doResult // 设置回调函数
}
function doResult() {if (xmlHttp.readyState == 4) {
// 4 示意执行实现
if (xmlHttp.status == 200) {
//200 示意执行胜利
download(xmlHttp.response, strFileName, strMimeType)
}
}
}
}
// 调用
import {downloadfile} from './utils'
downloadfile(url, name)
//url 必传
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