如何在url中强制下载pdf？ [英] How can I force a download of a pdf in a url?

问题描述

我有一个URL到一个pdf文件。在我的coldfusion页面，我想允许用户下载文件（使用打开/保存对话框，或者特定浏览器处理它）。

这是代码我到目前为止：

 < cfset tempFile = getTempFile（getTempDirectory（），'testfile'）/> 
< cfhttp url =myUrl / myFile.pdfmethod =getfile =＃tempFile＃/> 
 
< cfheader name =Content-Dispositionvalue =attachment; filename = myFile.pdf> 
< cfcontent type =application / pdffile =＃tempFile＃> 
  

这似乎工作...但是当我尝试打开文件时，会告诉我有什么问题文件。我做错了什么？

解决方案

文件属性：不要在此属性中的目录中指定路径;使用
路径属性。

尝试分离文件名和路径：

 <！---硬编码为清楚---> 
< cfhttp url =http://www.somesite.com/path/testFile.pdf
 method =get
 getAsBinary =yes
 path = c：/ test /
 file =testFile.pdf/> 
 
< cfheader name =Content-Dispositionvalue =attachment; filename = myFile.pdf/> 
< cfcontent type =application / pdffile =c：/test/testFile.pdf/> 
  

对于较小的文件，您可能会跳过临时文件，并使用< cfcontent变量..>

 < cfhttp url =http://download.macromedia.com /pub/documentation/en/coldfusion/mx7/cfmx7_cfml_qref.pdf
 method =get
 getAsBinary =yes/> 
 
< cfheader name =Content-Dispositionvalue =attachment; filename = myFile.pdf/> 
< cfcontent type =application / pdfvariable =＃cfhttp.fileContent＃/> 
  

---

更新：动态使用临时文件的示例

 < cfset tempDir = getTempDirectory（）/> 
< cfset tempFile = getFileFromPath（getTempFile（tempDir，testfile））/> 
 
<！---取消注释以验证路径
< 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-Dispositionvalue =attachment; filename = myFile.pdf/> 
< cfcontent type =application / pdffile =＃tempDir＃/＃tempFile＃/> 
  

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).

This is the code I have so far:

<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#">

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?

解决方案

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

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" />

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#" />

---

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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