watching CouchDB _changes?feed=continuous which returns chunked JSON

[Dobrica Pavlinusic]

I'm trying to implement queuing system on top of CouchDB using changes
feed described at:

http://wiki.apache.org/couchdb/HTTP_database_API#Changes

Problems are responses, which are chunked, with one JSON object in
each chunk. I don't really know how to get individual chunks using
Mojo::Client. I found _read sub which seems like a good place to
extract chunks, which I guess I could subclass and modify, but before
doing that I'm sure there is better way to solve this.

Thanks in advance for any hints about this.

[Sebastian Riedel]

> Problems are responses, which are chunked, with one JSON object in
> each chunk. I don't really know how to get individual chunks using
> Mojo::Client. I found _read sub which seems like a good place to
> extract chunks, which I guess I could subclass and modify, but before
> doing that I'm sure there is better way to solve this.

Yes there is a better way built in.

https://github.com/kraih/mojo/blob/master/lib/Mojo/Client.pm#L1344

--
Sebastian Riedel
http://blog.kraih.com
http://mojolicious.org
http://twitter.com/kraih

[Dobrica Pavlinušić]

Thanks a lot. Mojo is so full of useful stuff that it's sometimes hard
to find it :-)

For future reference, I needed also to split CouchDB output (because
it can return more than
one JSON in one chunk) and I ended up with following snippet:

https://github.com/dpavlin/angular-mojolicious/blob/master/couchdb-changes.pl

which might be useful when writing triggers based on changing CouchDB documents.

FWIW, chunked transfer is easier to use in Mojo::Client than in LWP::UserAgent
(which returns same documents over and over again when CouchDB sends
just newline).

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