Socat: HTTP Server that Terminates Early (useful for testing downstream service robustness)

socat_early_terminating_server.sh

#!/usr/bin/env bash

# change the sleep time appropriately
# this server is persistent
# mix and match with Content-Length and having larger and less content then 
# is actually produced
# as well as malformed Chunked Encoding

socat \
    -v -d -d \
    TCP-LISTEN:1234,crlf,reuseaddr,fork \
    SYSTEM:"
        echo HTTP/1.1 200 OK; 
        echo Content-Type\: text/plain; 
        echo;
        curl 'http://mirror.internode.on.net/pub/test/1000meg.test' &
        sleep 4s && kill %1 && exit 1;
    "
# alternatively just use http://pathod.net/