Externalise Erlang Term things (_revs, replication _ids)

[janl]

No description provided.

[nolanlawson]

Prior discussion in Pouch: pouchdb/pouchdb#4642

[davisp]

I just remembered that I wrote a Python JSON canonicalizer a long time ago. The basics are: sort keys when serializing, no added whitespace, strings are Unicode NFD normalized encoded in UTF-8, and floats are serialized using dtoa.c (or similarly compatible code, ie, 1.1 is printed as 1.1, not as 1.100000000000000088817842).

For strings I wonder if it'd be better to requiring anything that's non-ascii to be encoded using the \u escape sequences.

[davisp]

I should probably add a link to the thing:

https://github.com/davisp/jsonical

[nolanlawson]

Yeah in JS a popular one is: https://github.com/substack/json-stable-stringify

[wohali]

Migrated to apache/couchdb#1530