A basic application to help you get started writing an application against InfluxDB using the Node.js client.

The following environment variables are required to be set:

• INFLUXDB_ORGANIZATION - The name of your organization
• INFLUXDB_HOST - The hostname of the InfluxDB instance or Cloud environment you are using
• INFLUXDB_TOKEN - A token with read permissions to the bucket specified in INFLUXDB_BUCKET
• INFLUXDB_BUCKET - The name of your bucket

This application provides the ability to write data for its users, setup tasks to downsample their data, and query that downsampled data.

flowchart LR task[[task]] /tasks-. create task .->task /ingest-- raw data -->task task-- downsampled data -->/query 

From this directory with the environment variables above set in scope, run the application with node main.js to start the application listening on port 8080.

• Verify the application is running by navigating to http://localhost:8080 in your browser to see a welcome message.

• POST a request to the /tasks endpoint to install a downsampling task for the specified user.

  { "user_id":"user1", } 

• POST a request to the /ingest endpoint to write data for the specified.

  { "user_id":"user1", "measurement":"measurement1", "field1":10002 } 

• POST a request to the /query endpoint to receive the latest data for the specified user.

  { "user_id":"user1", } 

  The response is formatted as JSON.

  { "tables": [ { "records": [ { "_field": "field1_min", "_measurement": "downsampled", "_start": "2022-05-20 03", "_stop": "2022-05-21 03", "_time": "2022-05-21 03", "_value": "1", "result": "_result", "table": "0", "user_id": "user1" }, { "_field": "field1_max", "_measurement": "downsampled", "_start": "2022-05-20 03", "_stop": "2022-05-21 03", "_time": "2022-05-21 03", "_value": "75", "result": "_result", "table": "1", "user_id": "user1" }, { "_field": "field1_mean", "_measurement": "downsampled", "_start": "2022-05-20 03", "_stop": "2022-05-21 03", "_time": "2022-05-21 03", "_value": "14.272727272727273", "result": "_result", "table": "2", "user_id": "user1" }] }] }