I am using the following code to get the content from an object in s3 bucket. I am able to copy the data into a file locally, but the file needs to be 'downloaded' and it has to be shown in the browser's downloads list.
I searched a bit about this and cam to know this has something to do with response.setHeader( "Content-Disposition", "attachment;filename=\"" + filename + "\"" );
I tried to add that too but somehow couldn't get it to work. My understanding is that the source has to be a file on a server which is converted into a stream. but I get the s3 contents in the form of a input stream. How to i download this as a file in the browser?
Below is the code i have tried so far
AmazonS3 s3 = new AmazonS3Client(new ProfileCredentialsProvider());
S3Object fetchFile = s3.getObject(new GetObjectRequest(bucketname, fileloc));
final BufferedInputStream i = new BufferedInputStream(fetchFile.getObjectContent());
response.setContentType("application/json");
response.setHeader( "Content-Disposition", "attachment;filename=\"" + filename + "\"" );
ServletOutputStream sos = response.getOutputStream();
int bytesread = i.read();
while(bytesread!=-1)
{
sos.write(bytesread);
bytesread = i.read();
}
if(i!= null)i.close();
if(sos!= null)sos.close();
Everything is correct except the file reading part.
//Set the size of buffer to stream the data.
byte []buffer=new byte[1024*8];
instead of
int byte=i.read();
Now read the file.
while( ( length = yourInputStream.read(buffer))!=-1)
{ yourOutputStream.write(buffer);
}
System.out.println("File is downloaded.");
Additionally,puting your whole code within try/catch block will help you to know the exact reason of your problem.