All Questions
58
questions
0
votes
0
answers
66
views
zlib inflate failing with errors like invalid distance too far back/ invalid block type/ invalid stored block lengths
Background: I am trying to deflate an in-memory buffer into a file and inflate it later for debugging.
In this case when the logs are flowing at a faster rate (about every millisecond) I see failures ...
0
votes
1
answer
261
views
Java Deflater for large set of random strings
I am using the Deflater class to try to compress a large set of random strings. My compression and decompression methods look like this:
public static String compressAndEncodeBase64(String text) {
...
- 77
0
votes
1
answer
517
views
How to get size of uncompressed gzip file using flate2
I want the uncompressed size of a gzipped file using rust crate flate2.
How do I ask a GzDecoder or MultiGzDecoder for the uncompressed file size without reading the entire file?
I'm hoping for a ...
- 6,718
0
votes
1
answer
142
views
Code length of 15 not being hit in Zlib for 4KB Raw Data
I am verifying a Hardware Design block which does decompression (inflate). The decompressed data output should always be 4 KiB. As test data I am compressing chunks of 4 KiB data at a time using zlib'...
- 5
1
vote
2
answers
818
views
Java inflate exception on raw data
I was trying to decode the JWT payload in java but this payload is compressed/deflated
"zip": "DEF"
java.util.zip.DataFormatException: incorrect header check
private static byte[]...
- 13
1
vote
1
answer
8k
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Java.util.zip.DataFormatException: incorrect header check
First post, usually I find what Im looking for in other threads but not this time:
Im using javas Deflater and Inflater to compress/ decompress some data I send between a server and client application ...
- 15
0
votes
1
answer
284
views
Why does the PNG specification prohibit having zlib-compressed data with a preset dictionary?
For PNG compression method 0, the zlib compression method/flags code shall specify method code 8 (deflate compression) and an LZ77 window size of not more than 32768 bytes. The zlib compression method ...
- 14k
0
votes
1
answer
114
views
Is it always okay to Inflate zlib-wrapped data with the windowBits of 15?
If the zlib-wrapped data to Inflate has, in its zlib header, CINFO (which determines the LZ77 window size) that is other than 7 (the maximum valid), is it okay to Inflate it with the windowBits of 15 (...
- 14k
0
votes
2
answers
291
views
Dynamic Huffman: Bit Packing Clarity
I was just wondering if there are any good examples of Dynamic Huffman bit-packing. I don't understand the RFC material that well regarding bit-packing. I found a lot of great examples for Static ...
- 85
0
votes
1
answer
310
views
Inflate decompression operation success without processing complete compressed data
I am using Software Inflate methods ( Raw deflate method and not GZIP/ZLIB variants )for decompression operations.
Strangely, I noticed the following obseravations
1.) When I pass in a single ...
- 49
1
vote
0
answers
282
views
could functions compress() / compress2() from zlib be parallelized without breaking serial inflate()
I am trying to parallelize compression calls from zlib (compress / compress2 functions), where data to be compressed and output buffer is available at call time. For help I am following the code of ...
- 11
0
votes
1
answer
764
views
how to decompress data in php and the data which use pako.deflate from js
I use pako.deflate to compress data in javascript, like this:
js file:
const params = [{id: 5, name: '张三', list: [{code: '10010', type: 'media'}]},{id: 6, name: '李四', list: [{code: '20010', type: '...
- 137
0
votes
2
answers
643
views
Equivalent Inflate for Deflate function in Java
I have a function for decompression in Java. I want same equivalent function for compression. Right now my deflate function gives altogether different output. Functions are as below:
public ...
- 49
3
votes
1
answer
2k
views
Z_DATA_ERROR midway through inflate
I need to decompress some zlib compressed files found within a game's save data. I have no access to the game's source. Each file begins with 0x789C which tells me that they are indeed compressed with ...
- 2,410
0
votes
1
answer
1k
views
How to use Deflater and Inflater on large files in java?
I want to use Deflater and Inflater (NOT DeflaterOutputStream and InflaterInputStream) to compress files. The problem is that deflater stops working after mentioned buffer size in this case is 1024. I ...
- 331