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  2. Percent-encoding - Wikipedia

    en.wikipedia.org/wiki/Percent-encoding

    URL encoding, officially known as percent-encoding, is a method to encode arbitrary data in a uniform resource identifier (URI) using only the US-ASCII characters legal within a URI. Although it is known as URL encoding , it is also used more generally within the main Uniform Resource Identifier (URI) set, which includes both Uniform Resource ...

  3. 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 ...

  4. Query string - Wikipedia

    en.wikipedia.org/wiki/Query_string

    A query string is a part of a uniform resource locator (URL) that assigns values to specified parameters. A query string commonly includes fields added to a base URL by a Web browser or other client application, for example as part of an HTML document, choosing the appearance of a page, or jumping to positions in multimedia content.

  5. data URI scheme - Wikipedia

    en.wikipedia.org/wiki/Data_URI_scheme

    If one is not specified, the media type of the data URI is assumed to be text/plain;charset=US-ASCII. An optional base64 extension base64, separated from the preceding part by a semicolon. When present, this indicates that the data content of the URI is binary data, encoded in ASCII format using the Base64 scheme for binary-to-text encoding.

  6. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    Arbitrary, non-specific warning. The warning text may be logged or presented to the user. 214 Transformation Applied Added by a proxy if it applies any transformation to the representation, such as changing the content encoding, media type or the like. 299 Miscellaneous Persistent Warning Same as 199, but indicating a persistent warning.

  7. POST (HTTP) - Wikipedia

    en.wikipedia.org/wiki/POST_(HTTP)

    This is a format for encoding key-value pairs with possibly duplicate keys. Each key-value pair is separated by an '&' character, and each key is separated from its value by an '=' character. Keys and values are both escaped by replacing spaces with the '+' character and then using percent-encoding on all other non-alphanumeric [9] characters.

  8. Encryption - Wikipedia

    en.wikipedia.org/wiki/Encryption

    A message encoded with this type of encryption could be decoded with a fixed number on the Caesar cipher. [ 3 ] Around 800 AD, Arab mathematician Al-Kindi developed the technique of frequency analysis – which was an attempt to crack ciphers systematically, including the Caesar cipher. [ 2 ]

  9. MIME - Wikipedia

    en.wikipedia.org/wiki/MIME

    encoding can be either "Q" denoting Q-encoding that is similar to the quoted-printable encoding, or "B" denoting base64 encoding. encoded text is the Q-encoded or base64-encoded text. An encoded-word may not be more than 75 characters long, including charset, encoding, encoded text, and delimiters. If it is desirable to encode more text than ...