deflate

问题 Assume that the gzip file and zip archive both use DEFLATE. Since both would store the same raw compressed data for the specific file, is it possible to add a pre-compressed .gz file to an existing .zip archive? Some metadata would likely be lost (or not available), but I am more concerned with the raw file data. 回答1: Yes. I don't remember why I wrote this, but I'm sure there was a very good reason. Make sure you read the caveats in the comments. /* gz2zip.c version 1.0, 31 July 2018

问题 Assume that the gzip file and zip archive both use DEFLATE. Since both would store the same raw compressed data for the specific file, is it possible to add a pre-compressed .gz file to an existing .zip archive? Some metadata would likely be lost (or not available), but I am more concerned with the raw file data. 回答1: Yes. I don't remember why I wrote this, but I'm sure there was a very good reason. Make sure you read the caveats in the comments. /* gz2zip.c version 1.0, 31 July 2018

问题 I am working on implementing a SAMLSLO through HTTP-REDIRECT binding mechanism. Using deflate-inflate tools gives me a DataFormatException with incorrect header check. I tried this as a stand-alone. Though I did not get DataFormatException here I observed the whole message is not being returned. import java.io.UnsupportedEncodingException; import java.util.logging.Level; import java.util.zip.DataFormatException; import java.util.zip.Deflater; import java.util.zip.Inflater; public class

问题 I'm trying to find a balance between performance and degree of compression when gzipping a Java webapp response. In looking at the Deflater class, I can set a level and a strategy. The levels are self explanatory - BEST_SPEED to BEST_COMPRESSION . I'm not sure regarding the strategies - DEFAULT_STRATEGY , FILTERED and HUFFMAN_ONLY I can make some sense from the Javadoc but I was wondering if someone had used a specific strategy in their apps and if you saw any difference in terms of

问题 I'm trying to find a balance between performance and degree of compression when gzipping a Java webapp response. In looking at the Deflater class, I can set a level and a strategy. The levels are self explanatory - BEST_SPEED to BEST_COMPRESSION . I'm not sure regarding the strategies - DEFAULT_STRATEGY , FILTERED and HUFFMAN_ONLY I can make some sense from the Javadoc but I was wondering if someone had used a specific strategy in their apps and if you saw any difference in terms of

问题 I'm trying to read a compressed binary .x mesh file but my decompression is failing. The file is basically some directx header info and then a bunch of data in MSZIP format (i.e. 2 bytes are an int blockSize , 2 bytes are a "magic number" and then there are blockSize deflated bytes and then repeat until there's no more data) so for each block I'm just getting the compressed bytes and deflating like so- internal static byte[] DecompressBlock(byte[] data) { var result = new List<byte>(); var ms

问题 I'm trying to read a compressed binary .x mesh file but my decompression is failing. The file is basically some directx header info and then a bunch of data in MSZIP format (i.e. 2 bytes are an int blockSize , 2 bytes are a "magic number" and then there are blockSize deflated bytes and then repeat until there's no more data) so for each block I'm just getting the compressed bytes and deflating like so- internal static byte[] DecompressBlock(byte[] data) { var result = new List<byte>(); var ms

问题 I'm trying to read a compressed binary .x mesh file but my decompression is failing. The file is basically some directx header info and then a bunch of data in MSZIP format (i.e. 2 bytes are an int blockSize , 2 bytes are a "magic number" and then there are blockSize deflated bytes and then repeat until there's no more data) so for each block I'm just getting the compressed bytes and deflating like so- internal static byte[] DecompressBlock(byte[] data) { var result = new List<byte>(); var ms

问题 I use the request-module of python 2.7 to post a bigger chunk of data to a service I can't change. Since the data is mostly text, it is large but would compress quite well. The server would accept gzip- or deflate-encoding, however I do not know how to instruct requests to do a POST and encode the data correctly automatically. Is there a minimal example available, that shows how this is possible? 回答1: # Works if backend supports gzip additional_headers['content-encoding'] = 'gzip' request

问题 all I am developing to compress and decompress with boost in c++. my codes are below: #include <stdio.h> #include <vector> #include <string> #include <fstream> #include <iostream> #include <boost/iostreams/filtering_streambuf.hpp> #include <boost/iostreams/copy.hpp> #include <boost/iostreams/filter/gzip.hpp> char *txtFile = "D:/Temp/plainTest.txt"; char *txtFile2 = "D:/Temp/plainTest_.txt"; char *binFile = "D:/Temp/plainTest.bin"; // compress std::ifstream inStream(txtFile, std::ios_base::in)