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  2. Base64 - Wikipedia

    en.wikipedia.org/wiki/Base64

    Because Base64 is a six-bit encoding, and because the decoded values are divided into 8-bit octets, every four characters of Base64-encoded text (4 sextets = 4 × 6 = 24 bits) represents three octets of unencoded text or data (3 octets = 3 × 8 = 24 bits). This means that when the length of the unencoded input is not a multiple of three, the ...

  3. List of HTTP header fields - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_header_fields

    Content-Encoding: The type of encoding used on the data. See HTTP compression. Content-Encoding: gzip: Permanent RFC 9110: Content-Length: The length of the request body in octets (8-bit bytes). Content-Length: 348: Permanent RFC 9110: Content-MD5: A Base64-encoded binary MD5 sum of the content of the request body. Content-MD5 ...

  4. HTTP compression - Wikipedia

    en.wikipedia.org/wiki/HTTP_compression

    HTTP compression is a capability that can be built into web servers and web clients to improve transfer speed and bandwidth utilization. [1]HTTP data is compressed before it is sent from the server: compliant browsers will announce what methods are supported to the server before downloading the correct format; browsers that do not support compliant compression method will download uncompressed ...

  5. gzip - Wikipedia

    en.wikipedia.org/wiki/Gzip

    gzip is a file format and a software application used for file compression and decompression. The program was created by Jean-loup Gailly and Mark Adler as a free software replacement for the compress program used in early Unix systems, and intended for use by GNU (from which the "g" of gzip is derived).

  6. List of file signatures - Wikipedia

    en.wikipedia.org/wiki/List_of_file_signatures

    Online File Signature Database for Forensic Practitioners, a private compilation free to Law Enforcement; Man page for compress, uncompress, and zcat on SCO Open Server; Public Database of File Signatures; Complete list of magic numbers with sample files; the original libmagic data files with thousands of entries as used by file (command)

  7. Binary-to-text encoding - Wikipedia

    en.wikipedia.org/wiki/Binary-to-text_encoding

    A binary-to-text encoding is encoding of data in plain text. More precisely, it is an encoding of binary data in a sequence of printable characters . These encodings are necessary for transmission of data when the communication channel does not allow binary data (such as email or NNTP ) or is not 8-bit clean .

  8. List of file formats - Wikipedia

    en.wikipedia.org/wiki/List_of_file_formats

    ADZ – The GZip-compressed version of ADF. DMS – a disk-archiving system native to the Amiga. DSK – For archiving floppy disks from a number of other platforms, including the ZX Spectrum and Amstrad CPC. D64 – An archive of a Commodore 64 floppy disk. SDI – used for archiving and providing "virtual disk" functionality.

  9. Snappy (compression) - Wikipedia

    en.wikipedia.org/wiki/Snappy_(compression)

    The compression ratio is 20–100% lower than gzip. [5] Snappy is widely used in Google projects like Bigtable, MapReduce and in compressing data for Google's internal RPC systems. It can be used in open-source projects like MariaDB ColumnStore, [6] Cassandra, Couchbase, Hadoop, LevelDB, MongoDB, RocksDB, Lucene, Spark, InfluxDB, [7] and Ceph. [8]