我有一些大尺寸的PDF目录在我的网站上，我需要链接这些下载。当我在谷歌上搜索时，我发现下面有这样一件事。它应该打开“另存为…”弹出链接点击…
<head>
<meta name="content-disposition" content="inline; filename=filename.pdf">
...
但它不工作:/当我链接到一个文件如下，它只是链接到文件，并试图打开文件。
<a href="filename.pdf" title="Filie Name">File name</a>
更新(根据以下答案):
据我所知，没有100%可靠的跨浏览器解决方案。也许最好的方法是使用下面列出的web服务之一，并提供下载链接…
http://box.net/ http://droplr.com/ http://getcloudapp.com/
当前回答
我为Firefox找到了一个非常简单的解决方案(只适用于相对而不是直接href): add type="application/octet-stream":
<a href="./file.pdf" id='example' type="application/octet-stream">Example</a>
其他回答
添加响应头Content-Disposition:附件;后面跟着文件名。删除Meta Content-Disposition;Inline;哪个会在同一个窗口中打开文档
在java中，它被设置为
response.setHeader("Content-Disposition", "attachment;filename=test.jpg");
元标签并不是实现这一结果的可靠方法。一般来说，你甚至不应该这样做——应该由用户/用户代理来决定如何处理你提供的内容。如果用户愿意，总是可以强制浏览器下载文件。
如果您仍然希望强制浏览器下载文件，请直接修改HTTP报头。下面是一个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
请注意，这只是对HTTP协议的扩展;有些浏览器可能会忽略它。
我为Firefox找到了一个非常简单的解决方案(只适用于相对而不是直接href): add type="application/octet-stream":
<a href="./file.pdf" id='example' type="application/octet-stream">Example</a>
从答案到强制浏览器保存文件为单击链接后:
<a href="path/to/file" download>Click here to download</a>
服务器端解决方案更具兼容性，直到“download”属性在所有浏览器中实现。
一个Python示例可以是文件存储的自定义HTTP请求处理程序。指向文件存储的链接是这样生成的:
http://www.myfilestore.com/filestore/13/130787e71/download_as/desiredName.pdf
代码如下:
class HTTPFilestoreHandler(SimpleHTTPRequestHandler):
def __init__(self, fs_path, *args):
self.fs_path = fs_path # Filestore path
SimpleHTTPRequestHandler.__init__(self, *args)
def send_head(self):
# Overwrite SimpleHTTPRequestHandler.send_head to force download name
path = self.path
get_index = (path == '/')
self.log_message("path: %s" % path)
if '/download_as/' in path:
p_parts = path.split('/download_as/')
assert len(p_parts) == 2, 'Bad download link:' + path
path, download_as = p_parts
path = self.translate_path(path )
f = None
if os.path.isdir(path):
if not self.path.endswith('/'):
# Redirect browser - doing basically what Apache does
self.send_response(301)
self.send_header("Location", self.path + "/")
self.end_headers()
return None
else:
return self.list_directory(path)
ctype = self.guess_type(path)
try:
f = open(path, 'rb')
except IOError:
self.send_error(404, "File not found")
return None
self.send_response(200)
self.send_header("Content-type", ctype)
fs = os.fstat(f.fileno())
self.send_header("Expires", '0')
self.send_header("Last-Modified", self.date_time_string(fs.st_mtime))
self.send_header("Cache-Control", 'must-revalidate, post-check=0, pre-check=0')
self.send_header("Content-Transfer-Encoding", 'binary')
if download_as:
self.send_header("Content-Disposition", 'attachment; filename="%s"' % download_as)
self.send_header("Content-Length", str(fs[6]))
self.send_header("Connection", 'close')
self.end_headers()
return f
class HTTPFilestoreServer:
def __init__(self, fs_path, server_address):
def handler(*args):
newHandler = HTTPFilestoreHandler(fs_path, *args)
newHandler.protocol_version = "HTTP/1.0"
self.server = BaseHTTPServer.HTTPServer(server_address, handler)
def serve_forever(self, *args):
self.server.serve_forever(*args)
def start_server(fs_path, ip_address, port):
server_address = (ip_address, port)
httpd = HTTPFilestoreServer(fs_path, server_address)
sa = httpd.server.socket.getsockname()
print "Serving HTTP on", sa[0], "port", sa[1], "..."
httpd.serve_forever()
