Converta - part1 - cornice api for csv to json conversion and reverse

Design features :

• cornice python web service framework
• authorization by api token
• csv2json conversion by uploading csv zipfile and streaming json output
• json2csv conversion by uploading json record file and streaming csv zipfile output
• test option included to confirm parsing success
• admin functions for user CRUD
• see hardHash.py for a persistent hash design, similar to python shelve
• fulled tested and proven using curl web client
• deployed at Heroku for demo and future business options
• as at 25 Nov 2017, api is hosted on heroku

To try a demo :

1. email pmg7670@gmail.com to request a guest account access token
2. download the sample csv zipfile, unittest_csv02.zip in sample/
3. open a terminal
4. get member api apps list: curl -H X-Api-Token: https://converta.herokuapp.com/api/v1/member/list
5. run csv2json test command : curl -H X-Api-Token: -F srcfile=@/local/path/to/sample/unittest_csv02.zip https://converta.herokuapp.com/api/v1/member/test/csv2json api will confirm csv content is valid
6. run csv2json command, redirecting : curl -H X-Api-Token: -F srcfile=@/local/path/to/sample/unittest_csv02.zip https://converta.herokuapp.com/api/v1/member/test/csv2json > unittest_json02.txt
7. run json2csv test command : curl -H X-Api-Token: -F srcfile=@/local/path/to/sample/unittest_json02.txt https://converta.herokuapp.com/api/v1/member/test/json2csv api will confirm json content is valid
8. run json2csv command : curl -H X-Api-Token: -F srcfile=@/local/path/to/sample/unittest_json02.txt https://converta.herokuapp.com/api/v1/member/json2csv > unittest_csv02a.zip

Note : the csv and json format are application specific. A future version will be generic by interpreting a user provided json schema to define the table model