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Implementing a download servlet for iPad

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2

2

I have implemented a downloader servlet using java as stated:

Implementing a simple file download servlet

The requirement is, on the browser side, the file should be automatically downloaded, not triggered by any anchor click. On the ajax response, I call

document.location = "downloadServlet?fileId=foo"

The problem is, it works fine for all desktop browsers, android mobile devices.
But when the device is a iPad tablet, both chrome and safari do not download the file, for example if the file is a text file, the content is dumped to the page and my working page is lost. How can I force that the file is downloaded and not the content is shown? Even if trying a zip file for example, then the browser of tablet shows a different page and corrupts the working page. What I want is the browser downloads it as if performed SaveAs for all types of files.

Because the document.location changes the whole page on the iPad, I changed it to an anchor, but because it should be triggered automatically, I trigger the click event by

<a href="downloadServlet?.." target="_blank" rel="noopener" id="downloadAnchor" />

document.getElementById("downloadAnchor").click()

But then the popup blockers prevent the click event.

javascript java servlets download anchor

share|improve this question

asked Mar 27 at 13:36

benchpresserbenchpresser

86511 gold badge77 silver badges2525 bronze badges

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  In your servlet, try setting the response header Content-Disposition: attachment; filename=myfilename.myext
  
  – Palamino
  Mar 27 at 17:16
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Hi, I already added that but not working for iPad even if setting the disposition to attachment, when you download a text file its content is directly put to the initial page
  
  – benchpresser
  Mar 28 at 9:11
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I tried all options stackoverflow.com/questions/6520231/… but ipad+safari always opens the content on the current tab. Opening a new tab/window is not possible due popup blocking mechanism of safari. stackoverflow.com/questions/44180931/… does not help because the file is generated dynamically and we are not sure that we will download a file when clicking the link (business rule)
  
  – benchpresser
  Mar 28 at 15:37
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Try setting the content-type response header as application/octet-stream mime type
  
  – Palamino
  Mar 28 at 15:47
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  ı tried application/octet-stream, force-download, x-download but ipad always shows in the same page without saveas.
  
  – benchpresser
  Mar 29 at 6:24
  

  
  
  
  

add a comment | 

2

2

I have implemented a downloader servlet using java as stated:

Implementing a simple file download servlet

The requirement is, on the browser side, the file should be automatically downloaded, not triggered by any anchor click. On the ajax response, I call

document.location = "downloadServlet?fileId=foo"

The problem is, it works fine for all desktop browsers, android mobile devices.
But when the device is a iPad tablet, both chrome and safari do not download the file, for example if the file is a text file, the content is dumped to the page and my working page is lost. How can I force that the file is downloaded and not the content is shown? Even if trying a zip file for example, then the browser of tablet shows a different page and corrupts the working page. What I want is the browser downloads it as if performed SaveAs for all types of files.

Because the document.location changes the whole page on the iPad, I changed it to an anchor, but because it should be triggered automatically, I trigger the click event by

<a href="downloadServlet?.." target="_blank" rel="noopener" id="downloadAnchor" />

document.getElementById("downloadAnchor").click()

But then the popup blockers prevent the click event.

javascript java servlets download anchor

share|improve this question

asked Mar 27 at 13:36

benchpresserbenchpresser

86511 gold badge77 silver badges2525 bronze badges

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  In your servlet, try setting the response header Content-Disposition: attachment; filename=myfilename.myext
  
  – Palamino
  Mar 27 at 17:16
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Hi, I already added that but not working for iPad even if setting the disposition to attachment, when you download a text file its content is directly put to the initial page
  
  – benchpresser
  Mar 28 at 9:11
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I tried all options stackoverflow.com/questions/6520231/… but ipad+safari always opens the content on the current tab. Opening a new tab/window is not possible due popup blocking mechanism of safari. stackoverflow.com/questions/44180931/… does not help because the file is generated dynamically and we are not sure that we will download a file when clicking the link (business rule)
  
  – benchpresser
  Mar 28 at 15:37
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Try setting the content-type response header as application/octet-stream mime type
  
  – Palamino
  Mar 28 at 15:47
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  ı tried application/octet-stream, force-download, x-download but ipad always shows in the same page without saveas.
  
  – benchpresser
  Mar 29 at 6:24
  

  
  
  
  

add a comment | 

I have implemented a downloader servlet using java as stated:

Implementing a simple file download servlet

The requirement is, on the browser side, the file should be automatically downloaded, not triggered by any anchor click. On the ajax response, I call

document.location = "downloadServlet?fileId=foo"

The problem is, it works fine for all desktop browsers, android mobile devices.
But when the device is a iPad tablet, both chrome and safari do not download the file, for example if the file is a text file, the content is dumped to the page and my working page is lost. How can I force that the file is downloaded and not the content is shown? Even if trying a zip file for example, then the browser of tablet shows a different page and corrupts the working page. What I want is the browser downloads it as if performed SaveAs for all types of files.

Because the document.location changes the whole page on the iPad, I changed it to an anchor, but because it should be triggered automatically, I trigger the click event by

<a href="downloadServlet?.." target="_blank" rel="noopener" id="downloadAnchor" />

document.getElementById("downloadAnchor").click()

But then the popup blockers prevent the click event.

javascript java servlets download anchor

share|improve this question

asked Mar 27 at 13:36

benchpresserbenchpresser

86511 gold badge77 silver badges2525 bronze badges

document.location = "downloadServlet?fileId=foo"

<a href="downloadServlet?.." target="_blank" rel="noopener" id="downloadAnchor" />

document.getElementById("downloadAnchor").click()

share|improve this question

asked Mar 27 at 13:36

benchpresserbenchpresser

86511 gold badge77 silver badges2525 bronze badges

share|improve this question

asked Mar 27 at 13:36

benchpresserbenchpresser

86511 gold badge77 silver badges2525 bronze badges

asked Mar 27 at 13:36

benchpresserbenchpresser

86511 gold badge77 silver badges2525 bronze badges

asked Mar 27 at 13:36

benchpresserbenchpresser

86511 gold badge77 silver badges2525 bronze badges