Simple HTTP server that sleeps and returns random data as requested. Useful to mock other services simulating latency.

http-stochastic-sleeper.py

#!/usr/bin/env python

# HTTP Stochastic Sleeper
#
# Usage example: run this script with Python and visit the URL
#
#	http://127.0.0.1:8080/httpss?sleep=500&size=1000
#
# This will sleep 500 milliseconds and then return 1000 bytes.

import http.server, random, re, string, time

class HttpssRequestHandler(http.server.BaseHTTPRequestHandler):
	def do_GET(self):
		self.protocol_version = 'HTTP/1.1'
		match = re.search(r'^/httpss\?sleep=(?P<sleep>\d+)&size=(?P<size>\d+)$', self.path)
		if match:
			p_sleep = int(match.group('sleep')) / 1000.0
			p_size = int(match.group('size'))
			message = ''.join(random.choices(string.ascii_letters + string.digits + string.punctuation, k=p_size))
			b_message = bytes(message, "utf8")
			self.send_response(200)
			self.send_header('Content-type','text/plain')
			self.send_header('Content-length', len(b_message))
			self.end_headers()
			time.sleep(p_sleep)
			self.wfile.write(b_message)
		else:
			message = '404 Not Found'
			b_message = bytes(message, "utf8")
			self.send_response(404)
			self.send_header('Content-type', 'text/plain')
			self.send_header('Content-length', len(b_message))
			self.end_headers()
			self.wfile.write(b_message)

if __name__ == '__main__':
	httpss = http.server.HTTPServer(('127.0.0.1', 8080), HttpssRequestHandler)
	httpss.serve_forever()