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LibHTTP: Add support for the deflate content encoding

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Luke 2021-03-22 02:41:13 +00:00 • committed by Andreas Kling
parent 0255c8d976
commit 6cad2aba5e
1 changed files with 27 additions and 0 deletions
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27
Userland/Libraries/LibHTTP/Job.cpp
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@ -26,6 +26,7 @@
#include <AK/Debug.h>
#include <LibCompress/Gzip.h>
#include <LibCompress/Zlib.h>
#include <LibCore/TCPSocket.h>
#include <LibHTTP/HttpResponse.h>
#include <LibHTTP/Job.h>
@ -57,6 +58,32 @@ static ByteBuffer handle_content_encoding(const ByteBuffer& buf, const String& c
dbgln(" Output size: {}", uncompressed.value().size());
}
return uncompressed.value();
} else if (content_encoding == "deflate") {
dbgln_if(JOB_DEBUG, "Job::handle_content_encoding: buf is deflate compressed!");
// Even though the content encoding is "deflate", it's actually deflate with the zlib wrapper.
// https://tools.ietf.org/html/rfc7230#section-4.2.2
auto uncompressed = Compress::Zlib::decompress_all(buf);
if (!uncompressed.has_value()) {
// From the RFC:
// "Note: Some non-conformant implementations send the "deflate"
// compressed data without the zlib wrapper."
dbgln_if(JOB_DEBUG, "Job::handle_content_encoding: Zlib::decompress_all() failed. Trying DeflateDecompressor::decompress_all()");
uncompressed = Compress::DeflateDecompressor::decompress_all(buf);
if (!uncompressed.has_value()) {
dbgln("Job::handle_content_encoding: DeflateDecompressor::decompress_all() failed, returning original buffer.");
return buf;
}
}
if constexpr (JOB_DEBUG) {
dbgln("Job::handle_content_encoding: Deflate decompression successful.");
dbgln(" Input size: {}", buf.size());
dbgln(" Output size: {}", uncompressed.value().size());
}
return uncompressed.value();
}