CODEWITHSUNDEEP
javagzip
Jon
Jon

Reputation: 739

GZIP does not accept fileStream

String inFileName = testDoc.gz;

File inFile = new File(inFileName);
System.out.println(inFileName);
FileInputStream fileStream = new FileInputStream(inFile);
GZIPInputStream gzipInputStream = new GZIPInputStream(fileStream);

When executing the above code in the the last line returns the error:

java.io.IOException: Not in GZIP format

I have tried it with multiple documents and cannot see the problem.

EDIT: The documents were not created by me, they are downloaded. They are in the .gz format and by multiple documents I mean different .gz files.

Upvotes: 2

Views: 590

Answers (2)

javamonkey79
javamonkey79

Reputation: 17795

You could try mounting the GZIP file with VFS.

Upvotes: 1

Chochos
Chochos

Reputation: 5159

GZIPInputStream works with GZIP files, decompressing the input. GZIPOutputStream compressed whatever you write to it. So if you want to compress data, then you must write to a GZIPOutputStream.

To compress a file, read with with a FileInputStream and wrap a FileOutputStream with a GZIPOutputStream; read from the input file into a buffer, write the buffer to the GZIPOutputStream, until you're done and then close the GZIPOutputStream.

To decompress the data you can read it with a GZIPInputStream. I just checked it and it works; compressed a file with gzip on the command-line and read it with a GZIPInputStream (wrapped around a FileInputStream).

Upvotes: 0

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