json is:exact

Set the body of the response to the JSON encoding of the given value. Also sets "Content-Type" header to "application/json; charset=utf-8" if it has not already been set.
Set the body of the response to the JSON encoding of the given value. Also sets "Content-Type" header to "application/json; charset=utf-8" if it has not already been set.
Support for serialising Haskell to and from JSON JSON (JavaScript Object Notation) is a lightweight data-interchange format. It is easy for humans to read and write. It is easy for machines to parse and generate. It is based on a subset of the JavaScript Programming Language, Standard ECMA-262 3rd Edition - December 1999. This library provides a parser and pretty printer for converting between Haskell values and JSON.
Decoder of the JSON values into a JSON AST.
Encoder of JSON values from JSON AST.
Parse any JSON value. The conversion of a parsed value to a Haskell value is deferred until the Haskell value is needed. This may improve performance if only a subset of the results of conversions are needed, but at a cost in thunk allocation. This function is an alias for value. In aeson 0.8 and earlier, it parsed only object or array types, in conformance with the now-obsolete RFC 4627.

Warning

If an object contains duplicate keys, only the first one will be kept. For a more flexible alternative, see jsonWith.
Generate a Json display.
A QuasiQuoter for constructing JSON values. The constructed value is polymorph and unifies to instances of FromValue. When used as a ResponseMatcher it matches a response with
  • a status code of 200
  • a Content-Type header with value application/json
  • the specified JSON as response body
When used as a ByteString it creates a ByteString from the specified JSON that can be used as a request body for e.g. POST and PUT requests. Example:
>>> L.putStrLn [json|[23, {foo: 42}]|]
[23,{"foo":42}]
DataType for JSON. See PgJSON for more information