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Use the new "dcb" and "dcz" content encodings of Compressed Dictionary
The spec of Compression Dictionary Transport has been changed to use new `dcb` and `dcz` content encodings. httpwg/http-extensions#2784 To follow the spec change, this CL changes the Chromium implementation and tests as follows: - Use "dcb" content encoding name instead of "br-d". - Use "dcz" content encoding name instead of "zstd-d". - Remove the "Content-Dictionary" response header. - Check the magic number and the sha256 hash in the head of the Dictionary-Compressed streams using SharedDictionaryHeaderCheckerSourceStream. - Re-generate test files using the new content encodings. Bug: 1413922 Change-Id: I4f2f40c1f0c3666b4f0b54e34ad966ffccadd96b
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31 changes: 17 additions & 14 deletions
31
fetch/compression-dictionary/resources/compressed-data.py
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Original file line number | Diff line number | Diff line change |
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@@ -1,28 +1,31 @@ | ||
def main(request, response): | ||
response.headers.set(b"Access-Control-Allow-Origin", b"*") | ||
response.headers.set(b"Content-Type", b"text/plain") | ||
response.headers.set( | ||
b"Content-Dictionary", | ||
b":U5abz16WDg7b8KS93msLPpOB4Vbef1uRzoORYkJw9BY=:") | ||
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||
# `br_d_data` and `zstd_d_data` are generated using the following commands: | ||
# `dcb_data` and `dcz_data` are generated using the following commands: | ||
# | ||
# $ echo "This is a test dictionary." > /tmp/dict | ||
# $ echo -n "This is compressed test data using a test dictionary" \ | ||
# > /tmp/data | ||
# $ brotli -o /tmp/out.brd -D /tmp/dict /tmp/data | ||
# $ xxd -p /tmp/out.brd | tr -d '\n' | sed 's/\(..\)/\\x\1/g' | ||
br_d_data = b"\xa1\x98\x01\x80\x62\xa4\x4c\x1d\xdf\x12\x84\x8c\xae\xc2\xca\x60\x22\x07\x6e\x81\x05\x14\xc9\xb7\xc3\x44\x8e\xbc\x16\xe0\x15\x0e\xec\xc1\xee\x34\x33\x3e\x0d" | ||
# $ zstd -o /tmp/out.zstdd -D /tmp/dict /tmp/data | ||
# $ xxd -p /tmp/out.zstdd | tr -d '\n' | sed 's/\(..\)/\\x\1/g' | ||
zstd_d_data = b"\x28\xb5\x2f\xfd\x24\x34\xf5\x00\x00\x98\x63\x6f\x6d\x70\x72\x65\x73\x73\x65\x64\x61\x74\x61\x20\x75\x73\x69\x6e\x67\x03\x00\x59\xf9\x73\x54\x46\x27\x26\x10\x9e\x99\xf2\xbc" | ||
# | ||
# $ echo -en '\xffDCB' > /tmp/out.dcb | ||
# $ openssl dgst -sha256 -binary /tmp/dict >> /tmp/out.dcb | ||
# $ brotli --stdout -D /tmp/dict /tmp/data >> /tmp/out.dcb | ||
# $ xxd -p /tmp/out.dcb | tr -d '\n' | sed 's/\(..\)/\\x\1/g' | ||
dcb_data = b"\xff\x44\x43\x42\x53\x96\x9b\xcf\x5e\x96\x0e\x0e\xdb\xf0\xa4\xbd\xde\x6b\x0b\x3e\x93\x81\xe1\x56\xde\x7f\x5b\x91\xce\x83\x91\x62\x42\x70\xf4\x16\xa1\x98\x01\x80\x62\xa4\x4c\x1d\xdf\x12\x84\x8c\xae\xc2\xca\x60\x22\x07\x6e\x81\x05\x14\xc9\xb7\xc3\x44\x8e\xbc\x16\xe0\x15\x0e\xec\xc1\xee\x34\x33\x3e\x0d" | ||
# $ echo -en '\x5e\x2a\x4d\x18\x20\x00\x00\x00' > /tmp/out.dcz | ||
# $ openssl dgst -sha256 -binary /tmp/dict >> /tmp/out.dcz | ||
# $ zstd -D /tmp/dict -f -o /tmp/tmp.zstd /tmp/data | ||
# $ cat /tmp/tmp.zstd >> /tmp/out.dcz | ||
# $ xxd -p /tmp/out.dcz | tr -d '\n' | sed 's/\(..\)/\\x\1/g' | ||
dcz_data = b"\x5e\x2a\x4d\x18\x20\x00\x00\x00\x53\x96\x9b\xcf\x5e\x96\x0e\x0e\xdb\xf0\xa4\xbd\xde\x6b\x0b\x3e\x93\x81\xe1\x56\xde\x7f\x5b\x91\xce\x83\x91\x62\x42\x70\xf4\x16\x28\xb5\x2f\xfd\x24\x34\xf5\x00\x00\x98\x63\x6f\x6d\x70\x72\x65\x73\x73\x65\x64\x61\x74\x61\x20\x75\x73\x69\x6e\x67\x03\x00\x59\xf9\x73\x54\x46\x27\x26\x10\x9e\x99\xf2\xbc" | ||
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||
if b'content_encoding' in request.GET: | ||
content_encoding = request.GET.first(b"content_encoding") | ||
response.headers.set(b"Content-Encoding", content_encoding) | ||
if content_encoding == b"br-d": | ||
if content_encoding == b"dcb": | ||
# Send the pre compressed file | ||
response.content = br_d_data | ||
if content_encoding == b"zstd-d": | ||
response.content = dcb_data | ||
if content_encoding == b"dcz": | ||
# Send the pre compressed file | ||
response.content = zstd_d_data | ||
response.content = dcz_data |