August 2018
Beginner
594 pages
22h 33m
English
Content preview from Software Architect's Handbook
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Header compression
HTTP/2 performs header compression to improve performance. With HTTP/1.x, headers are always sent as plain text, but HTTP/2 uses the HPACK compression format to reduce the size. HPACK is used for compression with HTTP/2 because it is resilient to some of the security attacks that target compression, such as Compression Ratio Info-leak Made Easy (CRIME).
HPACK uses Huffman coding, a lossless data compression algorithm that can significantly reduce the size of the headers, reducing latency and improving performance.