Dummy Stock Stream Server
This is a dummy data generator emulating a very simple Stock price updates stream. It can be used to build test tasks or just play around with TCP sockets.
Status:
Install
With Docker
docker pull meistr/dummy-stock-stream
docker run --rm -it -p 8777:8777 meistr/dummy-stock-stream
From NPM Package
npx -p @meister/dummy-stock-stream stream-server
Testing the Setup
Once the server is up, you can check whether it’s working, by running:
nc 127.0.0.1 8777
or
telnet 127.0.0.1 8777
This opens the TCP stream to the server and you can use the commands described in the next section
Configuration Options
There are a few ENV variables you can modify to your needs
| ENV | Default | Description |
|---|---|---|
PORT |
8777 |
TCP Port that the server listens to |
POLLING_RATE |
20 |
Specifies the amount of messages produced per second |
DEBUG |
undefined | Display additional debug logs by changing default to *
|
For Docker version add env variable parameters to run command (i.e. -e DEBUG=*).
Protocol
Commands
To issue commands on the TCP socket, send message use following strings:
| Command | Description |
|---|---|
READY |
Ready to receive updates. This will start the data flow |
STOP |
Stop receiving updates. This will stop the server from sending additional updates |
BYE |
Disconnects from the server |
Responses
| Message | Description |
|---|---|
HELLO:${clientId} |
Returns on successful connection |
ECHO:${message} |
Returns the received command |
TICK:${action}:${price}:${timestamp} |
Stock ticker, receives action, price and timestamp variables |
BYE:${reason} |
Connection closed. Optional reason message. |
Contributions
Currently this repo serves a very specific purpose, and thus contributions are not open to public. Should you find this (somehow) and find it useful, feel free to contact me in Github.