A TCP proxy that adds a configurable amount of delay.
A simple way to simulate services behind slow networks locally.
Compile it and manually install, it's just a single executable.
First install the crystal language compiler, then:
git clone github.com/hugopl/delay-proxy.git
cd delay-proxy
crystal build --release src/main.cr -o bin/delay-proxy
Then copy bin/delay-proxy to whatever you want, e.g. /usr/bin/.
Suppose you want to simulate a redis-server behind a slow connection:
Start the redis-server in some terminal.
redis-server
Now start the delay-proxy
delay-proxy :6379
It will open the port 1234 and redirect all data to port 6369 with a delay of 200±10%ms
Now open redis-cli in yet another terminal
redis-cli -p 1234
All commands should work, but with a delay in the response.
127.0.0.1:1234> ping
PONG
127.0.0.1:1234>
On delay-proxy terminal you see
Listening port 1234 and redirecting to localhost:6379 after 200ms...
Client connected to proxy
Proxy connected to target
-> 27 bytes ⌛213ms
<- 49920 bytes ⌛205ms
<- 116160 bytes ⌛195ms
<- 39125 bytes ⌛201ms
-> 14 bytes ⌛215ms
<- 7 bytes ⌛193ms
The complete command without using the defaults is:
delay-proxy localhost:6379 1234 200
Suggestions, open an issue.
- Fork it (https://github.com/hugopl/delay-proxy/fork)
- Create your feature branch (
git checkout -b my-new-feature) - Commit your changes (
git commit -am 'Add some feature') - Push to the branch (
git push origin my-new-feature) - Create a new Pull Request
- Hugo Parente Lima - creator and maintainer