SYNOPSIS

          char *
          bson_as_legacy_extended_json (const bson_t *bson, size_t *length)

PARAMETERS

       • bson: A bson_t <>.

       • length: An optional location for the length of the resulting string.

DESCRIPTION

       bson_as_legacy_extended_json() <> encodes bson as a UTF-8 string using libbson's Legacy Extended JSON <>.
       This  function  is superseded by bson_as_canonical_extended_json() <> and bson_as_relaxed_extended_json()
       <>, which use the same  MongoDB  Extended  JSON  format  <https://github.com/mongodb/specifications/blob/
       master/source/extended-json/extended-json.md> as all other MongoDB drivers.

       The  caller  is responsible for freeing the resulting UTF-8 encoded string by calling bson_free() <> with
       the result.

       If non-NULL, length will be set to the length of the result in bytes.

RETURNS

       If successful, a newly allocated UTF-8 encoded string and length is set.

       Upon failure, NULL is returned.

EXAMPLE

          bson_t *b = BCON_NEW("foo", BCON_INT32(123));
          char *str = bson_as_legacy_extended_json(b, NULL);
          printf("Legacy Extended JSON: %s\n", str);
          // Prints:
          // Legacy Extended JSON: { "foo" : 123 }
          bson_free(str);
          bson_destroy(b);

Author

       MongoDB, Inc

Copyright

       2009-present, MongoDB, Inc.

2.2.1                                             Dec 11, 2025                   BSON_AS_LEGACY_EXTENDED_JSON(3)