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POAndroid Ignores Content-Disposition: Attachment Inside Iframe
 

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    <p>I have a link to a download handler inside an iframe. This download handler has "Content-Disposition: Attachment" in the headers to force the user to download the file. This works in every browser <em>except</em> on Android devices. Android ignores the file without any errors or messages. Using Fiddler, i can confirm that the handler is getting requested successfully, &amp; the download appears to complete successfully, but the browser is not letting me save or open the file.</p> <p>Before you tell me to stop using iframes, i am afraid that is not an option for me at this time.</p> <p>Below is some code to reproduce this issue. Three files:</p> <ol> <li>Default.aspx: Contains an iframe pointing to DownloadPage.aspx</li> <li>DownloadPage.aspx: Contains a hyperpink to Download.ashx</li> <li>Download.ashx: Responds with a text/plain content-type type with content-disposition: attachment</li> </ol> <p>Default.aspx:</p> <pre><code>&lt;%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="AndroidTest.Default" %&gt; &lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"&gt; &lt;html xmlns="http://www.w3.org/1999/xhtml"&gt; &lt;head runat="server"&gt; &lt;title&gt;&lt;/title&gt; &lt;/head&gt; &lt;body&gt; &lt;form id="form1" runat="server"&gt; &lt;div&gt; &lt;iframe src="DownloadPage.aspx" width="320" height="1000"&gt;&lt;/iframe&gt; &lt;/div&gt; &lt;/form&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>DownloadPage.aspx</p> <pre><code>&lt;%@ Page Language="C#" AutoEventWireup="true" CodeBehind="DownloadPage.aspx.cs" Inherits="AndroidTest.DownloadPage" %&gt; &lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"&gt; &lt;html xmlns="http://www.w3.org/1999/xhtml"&gt; &lt;head runat="server"&gt; &lt;title&gt;&lt;/title&gt; &lt;/head&gt; &lt;body&gt; &lt;form id="form1" runat="server"&gt; &lt;div&gt; &lt;asp:HyperLink NavigateUrl="~/Download.ashx" runat="server"&gt;Download&lt;/asp:HyperLink&gt; &lt;/div&gt; &lt;/form&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>Download.ashx.cs</p> <pre><code>using System; using System.Collections.Generic; using System.Linq; using System.Web; namespace AndroidTest { /// &lt;summary&gt; /// Summary description for Download /// &lt;/summary&gt; public class Download : IHttpHandler { public void ProcessRequest(HttpContext context) { context.Response.ContentType = "text/plain"; context.Response.AddHeader("Content-Disposition", "attachment;filename=\"test.txt\""); context.Response.Write("Hello World"); } public bool IsReusable { get { return false; } } } } </code></pre> <p>Thanks for your time.</p>
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