6.3

[toddtreece]

Adds:

• New query string options that can be combined and used with any output format (including single field output)
  • Limit results to number: ?limit=10
  • Output every Nth record: ?sample=4
  • Start output at offset: ?offset=2
• Latest record: /output/PUBLICKEY/latest in all formats
• Return only output for one field: /output/PUBLICKEY/FIELDNAME
• Return only latest value of field: /output/PUBLICKEY/FIELDNAME/latest
• Atom 1.0 feed output
• MySQL output
• PostgreSQL output

Examples:

Here's the full data set for the test stream: http://phantmqtt.sparkfun.com/output/BDPQQyM6pvf73kaRE2Ppc6z2Mwg?page=1

Query String Additions

• Limit to latest 5 records: http://phantmqtt.sparkfun.com/output/BDPQQyM6pvf73kaRE2Ppc6z2Mwg?limit=5
• Offset by 2 records: http://phantmqtt.sparkfun.com/output/BDPQQyM6pvf73kaRE2Ppc6z2Mwg?offset=2
• Offset 2 and limit 10: http://phantmqtt.sparkfun.com/output/BDPQQyM6pvf73kaRE2Ppc6z2Mwg?limit=10&offset=2
• Get every 4th record: http://phantmqtt.sparkfun.com/output/BDPQQyM6pvf73kaRE2Ppc6z2Mwg?sample=4

Single Field Output

• Only return the index field: http://phantmqtt.sparkfun.com/output/BDPQQyM6pvf73kaRE2Ppc6z2Mwg/index
• Combine with the query string changes and get the latest 5 values for the index field: http://phantmqtt.sparkfun.com/output/BDPQQyM6pvf73kaRE2Ppc6z2Mwg/index?limit=5

New Formats

• Atom: http://phantmqtt.sparkfun.com/output/BDPQQyM6pvf73kaRE2Ppc6z2Mwg.atom?page=1
• MySQL: http://phantmqtt.sparkfun.com/output/BDPQQyM6pvf73kaRE2Ppc6z2Mwg.sql?page=1
• PostgreSQL: http://phantmqtt.sparkfun.com/output/BDPQQyM6pvf73kaRE2Ppc6z2Mwg.psql?page=1

Latest record or field

• Latest record in JSON: http://phantmqtt.sparkfun.com/output/BDPQQyM6pvf73kaRE2Ppc6z2Mwg/latest.json
• Latest value for the timestamp field: http://phantmqtt.sparkfun.com/output/BDPQQyM6pvf73kaRE2Ppc6z2Mwg/timestamp/latest

[brennen]

lib/field_stream.js

Hehe.

[liudr]

This is great! Thanks for the hard work!

[liudr]

I know this is a closed issue. I tested, the limit works as long as it is 20 or larger. If you go to 19 or less, the server times out.

[liudr]

I was doing some test at night (11/03-11/04 2014). The sparkfun server wasn't responding every time I did json query on my web page. Sometimes it responds slowly after a few seconds and sometimes it responds quickly then other times there were no responses. I was sending the same commands by hand multiple times inside IE 11 (hate its cheesy F12 interface). Wondering if there were some server maintenance or maybe there are too much traffic.

[toddtreece]

Yeah. I was working on the servers until late last night. Things should have stabilized a bit by ~11pm EST.

[liudr]

Thanks! It's working now. I emptied my test stream thinking maybe the problems were caused by the fact that the stream was full. Well, I'll fill it up in a few days ;)
FYI, I was building google chart with selections of range of time to graph and density of data points to plot. It works nicely with the gte and lte.