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#include "http.h"
#include <zlib.h>
namespace NHttp {
TString CompressDeflate(TStringBuf source) {
int compressionlevel = Z_BEST_COMPRESSION;
z_stream zs = {};
if (deflateInit(&zs, compressionlevel) != Z_OK) {
throw yexception() << "deflateInit failed while compressing";
}
zs.next_in = (Bytef*)source.data();
zs.avail_in = source.size();
int ret;
char outbuffer[32768];
TString result;
// retrieve the compressed bytes blockwise
do {
zs.next_out = reinterpret_cast<Bytef*>(outbuffer);
zs.avail_out = sizeof(outbuffer);
ret = deflate(&zs, Z_FINISH);
if (result.size() < zs.total_out) {
result.append(outbuffer, zs.total_out - result.size());
}
} while (ret == Z_OK);
deflateEnd(&zs);
if (ret != Z_STREAM_END) {
throw yexception() << "Exception during zlib compression: (" << ret << ") " << zs.msg;
}
return result;
}
TString DecompressDeflate(TStringBuf source) {
z_stream zs = {};
if (inflateInit(&zs) != Z_OK) {
throw yexception() << "inflateInit failed while decompressing";
}
zs.next_in = (Bytef*)source.data();
zs.avail_in = source.size();
int ret;
char outbuffer[32768];
TString result;
// retrieve the decompressed bytes blockwise
do {
zs.next_out = reinterpret_cast<Bytef*>(outbuffer);
zs.avail_out = sizeof(outbuffer);
ret = inflate(&zs, Z_NO_FLUSH);
if (result.size() < zs.total_out) {
result.append(outbuffer, zs.total_out - result.size());
}
} while (ret == Z_OK);
inflateEnd(&zs);
if (ret != Z_STREAM_END) {
throw yexception() << "Exception during zlib decompression: (" << ret << ") " << zs.msg;
}
return result;
}
}
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