强制打开“另存为...”弹出窗口，在文本链接处打开，单击 HTML 中的 PDF
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Force to open "Save As..." popup open at text link click for PDF in HTML
提问by designer-trying-coding
I have some big size PDF catalogs at my website, and I need to link these as download. When I googled, I found such a thing noted below. It should open the "Save As..." popup at link click...
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。当我用谷歌搜索时，我发现了下面提到的这样一个事情。它应该在链接单击时打开“另存为...”弹出窗口...
<head>
<meta name="content-disposition" content="inline; filename=filename.pdf">
...
But it doesn't work :/ When I link to a file as below, it just links to file and is trying to open the file.
但它不起作用：/当我链接到如下文件时，它只是链接到文件并试图打开该文件。
<a href="filename.pdf" title="Filie Name">File name</a>
UPDATE (according to answers below):
更新（根据以下答案）：
As I see there is no 100% reliable cross-browser solution for this. Probably the best way is using one of the web services listed below, and giving a download link...
正如我所见，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网络服务之一，并提供下载链接...
回答by Ayush Gupta
From an answer to Force a browser to save file as after clicking link:
从对Force a browser to save file as after click link的回答：
<a href="path/to/file" download>Click here to download</a>
回答by DrWaky
<a href="file link" download target="_blank">Click here to download</a>
It works for me in Firefox and Chrome.
它在 Firefox 和 Chrome 中对我有用。
回答by Karel Petranek
Meta tags are not a reliable way to achieve this result. Generally you shouldn't even do this - it should be left up to the user/user agent to decide what do to with the content you provide. The user can always force their browser to download the file if they wish to.
元标记不是实现此结果的可靠方法。通常，您甚至不应该这样做 - 应该由用户/用户代理决定如何处理您提供的内容。如果他们愿意，用户总是可以强制他们的浏览器下载文件。
If you still want to force the browser to download the file, modify the HTTP headers directly. Here's a PHP code example:
如果还想强制浏览器下载文件，直接修改HTTP头即可。这是一个 PHP 代码示例：
$path = "path/to/file.pdf";
$filename = "file.pdf";
header('Content-Transfer-Encoding: binary'); // For Gecko browsers mainly
header('Last-Modified: ' . gmdate('D, d M Y H:i:s', filemtime($path)) . ' GMT');
header('Accept-Ranges: bytes'); // Allow support for download resume
header('Content-Length: ' . filesize($path)); // File size
header('Content-Encoding: none');
header('Content-Type: application/pdf'); // Change the mime type if the file is not PDF
header('Content-Disposition: attachment; filename=' . $filename); // Make the browser display the Save As dialog
readfile($path); // This is necessary in order to get it to actually download the file, otherwise it will be 0Kb
Note that this is just an extension to the HTTP protocol; some browsers might ignore it anyway.
请注意，这只是 HTTP 协议的扩展；无论如何，某些浏览器可能会忽略它。
回答by Tony
I had this same issue and found a solution that has worked great so far. You put the following code in your .htaccessfile:
我遇到了同样的问题，并找到了一个迄今为止效果很好的解决方案。您将以下代码放入您的.htaccess文件中：
<FilesMatch "\.(?i:pdf)$">
ForceType application/octet-stream
Header set Content-Disposition attachment
</FilesMatch>
It came from Force a File to Download Instead of Showing Up in the Browser.
回答by User
I found a very simple solution for Firefox (only works with a relative rather than a direct href): add type="application/octet-stream":
我为 Firefox 找到了一个非常简单的解决方案（仅适用于相对而不是直接 href）：添加type="application/octet-stream"：
<a href="./file.pdf" id='example' type="application/octet-stream">Example</a>
回答by Sharad Gautam
Try adding this line to your .htaccess file.
尝试将此行添加到您的 .htaccess 文件中。
AddType application/octet-stream .pdfI hope it'll work as it is browser independent.
我希望它能工作，因为它是独立于浏览器的。
回答by Ashay
Generally it happens, because some browsers settings or plug-ins directly open PDF in the same window like a simple web page.
一般会出现这种情况，因为有些浏览器设置或者插件直接在同一个窗口中打开PDF，就像一个简单的网页。
The following might help you. I have done it in PHP a few years back. But currently I'm not working on that platform.
以下内容可能对您有所帮助。几年前我用 PHP 完成了它。但目前我不在那个平台上工作。
<?php
if (isset($_GET['file'])) {
$file = $_GET['file'];
if (file_exists($file) && is_readable($file) && preg_match('/\.pdf$/',$file)) {
header('Content-type: application/pdf');
header("Content-Disposition: attachment; filename=\"$file\"");
readfile($file);
}
}
else {
header("HTTP/1.0 404 Not Found");
echo "<h1>Error 404: File Not Found: <br /><em>$file</em></h1>";
}
?>
Save the above as download.php.
将以上内容另存为download.php。
Save this little snippet as a PHP file somewhere on your server and you can use it to make a file download in the browser, rather than display directly. If you want to serve files other than PDF, remove or edit line 5.
将此小片段保存为服务器上某个位置的 PHP 文件，您可以使用它在浏览器中下载文件，而不是直接显示。如果您想提供 PDF 以外的文件，请删除或编辑第 5 行。
You can use it like so:
你可以像这样使用它：
Add the following link to your HTML file.
将以下链接添加到您的 HTML 文件。
<a href="download.php?file=my_pdf_file.pdf">Download the cool PDF.</a>
Reference from: This blog
参考资料：本博客
回答by manish1706
Just put the below code in your .htaccessfile:
只需将以下代码放入您的.htaccess文件中：
AddType application/octet-stream .csv
AddType application/octet-stream .xls
AddType application/octet-stream .doc
AddType application/octet-stream .avi
AddType application/octet-stream .mpg
AddType application/octet-stream .mov
AddType application/octet-stream .pdf
Or you can also do trick by JavaScript
或者你也可以通过 JavaScript 来做技巧
element.setAttribute( 'download', whatever_string_you_want);
回答by NowLiveLove
I just used this, but I don't know if it works across all browsers.
我刚用过这个，但我不知道它是否适用于所有浏览器。
It works in Firefox:
它适用于 Firefox：
<a href="myfile.pdf" download>Click to Download</a>
回答by Mr. Bungle
A reallysimple way to achieve this, without using external download sites or modifying headers etc. is to simply create a ZIP file with the PDF inside and link directly to the ZIP file. This will ALWAYS trigger the Save/Open dialog, and it's still easy for people to double-click the PDF windows the program associated with .zip is launched.
实现此目的的一种非常简单的方法，无需使用外部下载站点或修改标题等，只需创建一个包含 PDF 的 ZIP 文件，然后直接链接到 ZIP 文件。这将始终触发“保存/打开”对话框，并且人们仍然可以轻松地双击与 .zip 关联的程序启动的 PDF 窗口。
BTW great question, I was looking for an answer as well, since most browser-embedded PDF plugins take sooo long to display anything (and will often hang the browser whilst the PDF is loading).
顺便说一句，好问题，我也在寻找答案，因为大多数浏览器嵌入的 PDF 插件需要很长时间才能显示任何内容（并且通常会在加载 PDF 时挂起浏览器）。
