如何强制在 url 中下载 pdf? [英] How can I force a download of a pdf in a url?

问题描述

我有一个指向 pdf 文件的 URL.在我的coldfusion页面中，我想允许用户下载文件(使用打开/保存对话框或特定浏览器处理它).

I have a URL that goes to a pdf file. In my coldfusion page, I want to allow the user to download the file (using the open/save dialog or however that particular browser handles it).

这是我目前的代码:

<cfset tempFile = getTempFile(getTempDirectory(), 'testfile') />
<cfhttp url="myUrl/myFile.pdf" method="get" file="#tempFile#"/>

<cfheader name="Content-Disposition" value="attachment; filename=myFile.pdf">
<cfcontent type="application/pdf" file="#tempFile#">

这似乎有效...但是当我尝试打开文件时，它告诉我文件有问题.我做错了什么?

This seems to work... but when I try to open the file it tells me something's wrong with the file. What am I doing wrong?

推荐答案

文件属性:不指定路径到此属性中的目录；利用路径属性.

file attribute: Do not specify the path to the directory in this attribute; use the path attribute.

尝试分离文件名和路径:

Try separating the file name and path:

<!--- hard coded for clarity --->
<cfhttp url="http://www.somesite.com/path/testFile.pdf" 
        method="get" 
        getAsBinary="yes"
        path="c:/test/" 
        file="testFile.pdf"/>

<cfheader name="Content-Disposition" value="attachment; filename=myFile.pdf" />
<cfcontent type="application/pdf" file="c:/test/testFile.pdf" />

对于较小的文件，您可以跳过临时文件并使用 <cfcontent variable..>

For smaller files you might skip the temp file and use <cfcontent variable..>

<cfhttp url="http://download.macromedia.com/pub/documentation/en/coldfusion/mx7/cfmx7_cfml_qref.pdf" 
        method="get" 
        getAsBinary="yes" />

<cfheader name="Content-Disposition" value="attachment; filename=myFile.pdf" />
<cfcontent type="application/pdf" variable="#cfhttp.fileContent#" />

<小时>

更新:使用临时文件的动态示例

---

Update: Dynamic example using a temp file

<cfset tempDir  = getTempDirectory() />
<cfset tempFile = getFileFromPath(getTempFile(tempDir, "testfile")) />

<!--- uncomment to verify paths 
<cfoutput>
    tempDir = #tempDir#<br />
    tempFile = #tempFile#<br />
</cfoutput>
<cfabort />
--->
<cfhttp url="http://download.macromedia.com/pub/documentation/en/coldfusion/mx7/cfmx7_cfml_qref.pdf" 
        method="get" 
        getAsBinary="yes"
        path="#tempDir#" 
        file="#tempFile#" />

<cfheader name="Content-Disposition" value="attachment; filename=myFile.pdf" />
<cfcontent type="application/pdf" file="#tempDir#/#tempFile#" />

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