What is a JSON octet and why are two required?

  1. An octet is a group of 8 bits. Today, octet is synonymous with byte, but byte historically referred to any “native” grouping of bits, and that could mean 4,6,7, or 8 bits.
  2. JSON text must contain at least two octets because the top-level structure of a JSON document is an array or object, and the shortest representations of those are [] and {}, respectively.
  3. Check the value messages. It is probably empty, unset or consists of a single digit (like 4), which is not valid JSON, but accepted by many JSON implementations.

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