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A minimal web server that runs shell commands, powered by Tornado and its Subprocess module
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| """ | |
| A minimal web server that runs shell commands, powered by Tornado and its | |
| Subprocess module. It does non-blocking IO and streams the response. | |
| To start the server: | |
| $ python tornado_subprocess.py | |
| To send a shell command using httpie: | |
| $ echo 'ls -l /' | http POST http://localhost:8899 --stream | |
| """ | |
| import shlex | |
| import tornado.ioloop | |
| import tornado.web | |
| from tornado import gen | |
| from tornado.iostream import StreamClosedError | |
| from tornado.process import Subprocess | |
| class MainHandler(tornado.web.RequestHandler): | |
| @gen.coroutine | |
| def post(self): | |
| cmd = shlex.split(self.request.body) | |
| yield self.run_subprocess(cmd) | |
| @gen.coroutine | |
| def run_subprocess(self, cmd): | |
| proc = Subprocess(cmd, stdout=Subprocess.STREAM, | |
| stderr=Subprocess.STREAM) | |
| yield self.redirect_stream(proc.stdout) | |
| yield self.redirect_stream(proc.stderr) | |
| @gen.coroutine | |
| def redirect_stream(self, stream): | |
| while True: | |
| try: | |
| data = yield stream.read_bytes(128, partial=True) | |
| except StreamClosedError: | |
| break | |
| else: | |
| self.write(data) | |
| self.flush() | |
| def make_app(): | |
| return tornado.web.Application([ | |
| (r'/', MainHandler) | |
| ]) | |
| if __name__ == "__main__": | |
| app = make_app() | |
| app.listen(8899) | |
| tornado.ioloop.IOLoop.current().start() |
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