Transport Take Home Exercise
Code submission per the document "Transport Take Home Exercise (1).pdf"
Built, tested, and deployed using python 3.8.9.
Built and tested using flask and pytest.
Deployed using zappa:
https://github.com/zappa/Zappa
using aws lambda, api gateway, and s3:
https://rqzhkvrwdc.execute-api.us-east-1.amazonaws.com/dev/metric/ox/sum
Example deployed calls:
[ ** deployed time limit set to 20 seconds instead of 1 hour in .env ]
[ ** using httpie ]
% http -v POST https://rqzhkvrwdc.execute-api.us-east-1.amazonaws.com/dev/metric/ox <<< '{"value": 42}'
POST /dev/metric/ox HTTP/1.1
....
{
"value": 42
}
HTTP/1.1 200 OK
....
{}
Less than 20 seconds later:
% http -v https://rqzhkvrwdc.execute-api.us-east-1.amazonaws.com/dev/metric/ox/sum
GET /dev/metric/ox/sum HTTP/1.1
....
HTTP/1.1 200 OK
....
{
"value": 42
}
More than 20 seconds later:
% http -v https://rqzhkvrwdc.execute-api.us-east-1.amazonaws.com/dev/metric/ox/sum
GET /dev/metric/ox/sum HTTP/1.1
....
HTTP/1.1 200 OK
....
{
"value": 0
}
Local Workspace
To setup your local workspace:
git clone https://github.com/oxbits/example_transport_code.git
pyenv install 3.8.9 # you may have to install this python version
pyenv local 3.8.9
pip install virtualenv # you may have to install virtualenv for this python version
virtualenv -p python fenv
source ./fenv/bin/activate
cd example_transport_code
pip install -r requirements.txt
export FLASK_APP=app.py
pytest
flask run
.env File Configuration:
CACHE_MICROSECONDS=360_000_000 # 1 hour in microseconds
USE_S3=false # when set to false uses local files
S3_BUCKET=YOUR_S3_BUCKET_NAME
Example local workspace calls:
[ ** .env time limit in repo set to 1 hour ]
[ ** time limit set to 20 seconds instead of 1 hour for below examples ]
[ ** using httpie ]
% http -v POST http://127.0.0.1:5000/metric/ox <<< '{"value": 42}'
POST /metric/ox HTTP/1.1
....
{
"value": 42
}
HTTP/1.0 200 OK
....
{}
Less than .env microseconds limit:
% http -v http://127.0.0.1:5000/metric/ox/sum
GET /metric/ox/sum HTTP/1.1
....
HTTP/1.0 200 OK
....
{
"value": 42
}
More than .env microseconds limit:
% http -v http://127.0.0.1:5000/metric/ox/sum
GET /metric/ox/sum HTTP/1.1
....
HTTP/1.0 200 OK
....
{
"value": 0
}