有没有办法在客户端创建文本文件并提示用户下载它,而不与服务器进行任何交互?我知道我不能直接写入他们的机器(安全性和所有),但是我可以创建并提示他们保存它吗?
我的网站上有一些大尺寸的PDF目录,我需要将它们作为下载链接.当我用Google搜索时,我发现下面有这样的事情.它应该在链接点击时打开" 另存为... "弹出窗口...
<head>
<meta name="content-disposition" content="inline; filename=filename.pdf">
...
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但它不起作用:/当我链接到如下文件时,它只链接到文件,并试图打开该文件.
<a href="filename.pdf" title="Filie Name">File name</a>
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更新(根据以下答案):
我认为没有100%可靠的跨浏览器解决方案.可能最好的方法是使用下面列出的一个Web服务,并提供下载链接...
如何让浏览器显示"另存为对话框",以便用户可以将字符串的内容保存到系统中的文件中?
例如:
var myString = "my string with some stuff";
save_to_filesystem(myString,"myString.txt");
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结果是这样的:

我正在使用的业务应用程序angularJS.我的一个服务方法返回我byte[](包括PDF文件内容)现在我需要下载此文件作为PDF客户端机器使用JavaScript.
如何使用HTML5 Apis或任何JavaScript API?
我用过 window.atob(base64String)
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但得到以下错误 Failed to execute 'atob' on 'Window': The string to be decoded is not correctly encoded.
我读了几个关于相同的旧线程,但看到文件API最近发生了很大的变化.我的要求是保存一个json文件(数据在indexdDB本地,但我需要一种备份方式).由于我使用indexdDB,我只针对最近的浏览器,主要是chrome.那么,是否可以将数据(json字符串)保存到客户端计算机?
我见过http://eligrey.com/demos/FileSaver.js/,但有没有办法本地做到这一点?
谢谢.
我知道SO上已经存在很多与此类问题相关的问题,例如:
这个问题非常适用于iOS 8.1.3上的Safari(移动版,iPad 2+).我们有一个使用Application Cache和IndexedDB的离线AngularJS Web应用程序来存储数据.一种数据是可以相对较大的PDF文档:最大约25兆字节.我们将这些文件存储在IndexedDB中,当用户想要下载它时,我们在浏览器中使用JavaScript将该文件存储在内存中.
当用户想要保存它时,问题就出现了.Safari Mobile可能会因数据URI的大小限制或其他原因而崩溃.
this.save = function (file) {
var mediaType = "application/pdf";
var link = document.createElement("a");
var blob = new Blob([this.fromBase64ToBinary(file.content)], { type: mediaType });
var blobUrl = URL.createObjectURL(blob);
document.body.appendChild(link);
link.download = file.name;
link.href = blobUrl;
link.click();
document.body.removeChild(link);
};
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在服务中,我们有一个函数save(file),其中file包含两个属性的对象:
name:文件名;content:文件的数据,基本64编码,然后我们将其转换为二进制.该atob()功能可以是原因?当我在运行此代码的iPad上进行逐步调试时,它会在那里崩溃(即:与行对齐var byteCharacters = atob(b64Data);).
this.fromBase64ToBinary = function (base64) …Run Code Online (Sandbox Code Playgroud) 我正在将HTML表导出到xlsforamt.导出后,如果您在Libre Office中打开它,它工作正常,但同样在Microsoft Office中打开一个空白屏幕.
我不想要jquery解决方案请提供任何javascript解决方案.请帮忙.
function fnExcelReport() {
var tab_text = "<table border='2px'><tr bgcolor='#87AFC6'>";
var textRange;
var j = 0;
tab = document.getElementById('table'); // id of table
for (j = 0; j < tab.rows.length; j++) {
tab_text = tab_text + tab.rows[j].innerHTML + "</tr>";
//tab_text=tab_text+"</tr>";
}
tab_text = tab_text + "</table>";
tab_text = tab_text.replace(/<A[^>]*>|<\/A>/g, ""); //remove if u want links in your table
tab_text = tab_text.replace(/<img[^>]*>/gi, ""); // remove if u want images in …Run Code Online (Sandbox Code Playgroud)我正在尝试实现从 PWA 下载图像。我在用
<a target="_blank"
rel="noopener noreferrer"
href="photo.url"
download>Download image</a>
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实现这一目标。我擅长桌面 Chrome、Safari 和 Android 版 Chrome。但是当我在 Safari iOS 13 上处于独立模式 (PWA) 时,我无法关闭为保存文件而打开的打开窗口。在 iOS 12 上有一个按钮“完成”和图像预览。
我已经尝试过这里的解决方案。但没有成功;Safari 阻止window.open().
我正在尝试保存webAudio API的输出以供将来使用,到目前为止我认为获取PCM数据并将其保存为文件将符合我的期望,我想知道webAudio或mozAudio是否已经支持保存输出流,如果不是如何可以我从输出流中获取pcm数据
我有一个React应用程序,使用Python和Flask构建的REST后端.我正在从数据库下载数据并通过浏览器将其保存为CSV文件. 我有这个工作. 然而,我不明白的原因是为什么我必须超越我一直在阅读的资源并将其混合以使其发挥作用.为什么我没有发现这个概述更好?
有人说我要做的就是用mimetype设置响应头,并且Content-Disposition: attachment; filename=something.csv:
然而,仅此一点,仅使用普通链接,而不是fetch()和身份验证,所以我不得不寻找将客户端数据保存到磁盘的方法,例如:
所以,我的问题是:
似乎第一个问题的答案是我不能修改请求头(添加身份验证令牌),除非通过XHR类型的工作.这似乎在这里得到了回答(没有回答,真的):
并且,由于某种原因,对XHR的反应Content-Disposition: attachment毫无意义.真的吗?在现代浏览器中管理这样的请求是否有更内在的方法?
我觉得我不明白这一点,这让我感到烦恼.
无论如何,这是我希望简化的工作代码,如果可能的话:
// https://stackoverflow.com/a/18197511/680464
download(filename, text) {
var pom = document.createElement('a');
pom.setAttribute('href', 'data:text/csv;charset=utf-8,' + encodeURIComponent(text));
pom.setAttribute('download', filename);
if (document.createEvent) {
var event = document.createEvent('MouseEvents');
event.initEvent('click', true, true);
pom.dispatchEvent(event);
}
else {
pom.click();
}
}
downloadReport(studyID) {
fetch(`/api/admin/studies/${studyID}/csv`
, {
headers: {
"Authorization": "Bearer " + this.props.authAPI.getToken()
, "Accept": "text/csv" …Run Code Online (Sandbox Code Playgroud)