PlayFramework: How do I know a user downloaded a file completely?












0















I am using PlayFramework (currently v2.6.3) with Java.



I am providing a dynamically generated CSV file the user has to download with his browser.



For simplicity, I am storing the CSV in a temp file and then I stream it to the user, following this approach from https://www.playframework.com/documentation/2.6.x/JavaStream#serving-files



public Result index() {

    return ok(new java.io.File("/tmp/fileToServe.pdf"), "fileToServe.pdf");

}


Now, this CSV file could be rather large, let's say 30MB. I must know, if the user downloaded the whole file or not.



Background:
If file is downloaded completely, I want to flag my records in the database as "isDownloaded".



If he the user cancels the download after 5MB or the network breaks down, I do not want to flag anything.



So how can I detect a complete download with PlayFramework?



Thank you,
schube






java playframework







share|improve this question



























    0















    I am using PlayFramework (currently v2.6.3) with Java.



    I am providing a dynamically generated CSV file the user has to download with his browser.



    For simplicity, I am storing the CSV in a temp file and then I stream it to the user, following this approach from https://www.playframework.com/documentation/2.6.x/JavaStream#serving-files



    public Result index() {
    
    return ok(new java.io.File("/tmp/fileToServe.pdf"), "fileToServe.pdf");
    
}


    Now, this CSV file could be rather large, let's say 30MB. I must know, if the user downloaded the whole file or not.



    Background:
    If file is downloaded completely, I want to flag my records in the database as "isDownloaded".



    If he the user cancels the download after 5MB or the network breaks down, I do not want to flag anything.



    So how can I detect a complete download with PlayFramework?



    Thank you,
    schube






    java playframework







    share|improve this question

























      0












      0








      0








      I am using PlayFramework (currently v2.6.3) with Java.



      I am providing a dynamically generated CSV file the user has to download with his browser.



      For simplicity, I am storing the CSV in a temp file and then I stream it to the user, following this approach from https://www.playframework.com/documentation/2.6.x/JavaStream#serving-files



      public Result index() {
      
    return ok(new java.io.File("/tmp/fileToServe.pdf"), "fileToServe.pdf");
      
}


      Now, this CSV file could be rather large, let's say 30MB. I must know, if the user downloaded the whole file or not.



      Background:
      If file is downloaded completely, I want to flag my records in the database as "isDownloaded".



      If he the user cancels the download after 5MB or the network breaks down, I do not want to flag anything.



      So how can I detect a complete download with PlayFramework?



      Thank you,
      schube






      java playframework







      share|improve this question














      I am using PlayFramework (currently v2.6.3) with Java.



      I am providing a dynamically generated CSV file the user has to download with his browser.



      For simplicity, I am storing the CSV in a temp file and then I stream it to the user, following this approach from https://www.playframework.com/documentation/2.6.x/JavaStream#serving-files



      public Result index() {
      
    return ok(new java.io.File("/tmp/fileToServe.pdf"), "fileToServe.pdf");
      
}


      Now, this CSV file could be rather large, let's say 30MB. I must know, if the user downloaded the whole file or not.



      Background:
      If file is downloaded completely, I want to flag my records in the database as "isDownloaded".



      If he the user cancels the download after 5MB or the network breaks down, I do not want to flag anything.



      So how can I detect a complete download with PlayFramework?



      Thank you,
      schube






      java playframework




      java playframework






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Jan 2 at 14:23









      schubeschube

      1049




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