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#!/usr/bin/env python3
import argparse
import base64
import errno
import json
import socket
import ssl
import sys
try:
from BaseHTTPServer import HTTPServer, BaseHTTPRequestHandler
except ImportError:
from http.server import HTTPServer
from http.server import BaseHTTPRequestHandler
rpc_sock = None
parser = argparse.ArgumentParser(description='http(s) proxy for SPDK RPC calls')
parser.add_argument('host', help='Host name / IP representing proxy server')
parser.add_argument('port', help='Port number', type=int)
parser.add_argument('user', help='User name used for authentication')
parser.add_argument('password', help='Password used for authentication')
parser.add_argument('-s', dest='sock', help='RPC domain socket path', default='/var/tmp/spdk.sock')
parser.add_argument('-c', dest='cert', help='SSL certificate')
def print_usage_and_exit(status):
print('Usage: rpc_http_proxy.py <server IP> <server port> <user name>' +
' <password> <SPDK RPC socket (optional, default: /var/tmp/spdk.sock)>')
sys.exit(status)
def rpc_call(req):
global rpc_sock
sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
sock.connect(rpc_sock)
sock.sendall(req)
if 'id' not in json.loads(req.decode('ascii')):
sock.close()
return None
buf = ''
closed = False
response = None
while not closed:
newdata = sock.recv(1024)
if (newdata == b''):
closed = True
buf += newdata.decode('ascii')
try:
response = json.loads(buf)
except ValueError:
continue # incomplete response; keep buffering
break
sock.close()
if not response and len(buf) > 0:
raise
return buf
class ServerHandler(BaseHTTPRequestHandler):
key = ""
def do_HEAD(self):
self.send_response(200)
self.send_header('Content-type', 'text/html')
self.end_headers()
def do_AUTHHEAD(self):
self.send_response(401)
self.send_header('WWW-Authenticate', 'text/html')
self.send_header('Content-type', 'text/html')
self.end_headers()
def do_INTERNALERROR(self):
self.send_response(500)
self.send_header('Content-type', 'text/html')
self.end_headers()
def do_POST(self):
if self.headers['Authorization'] != 'Basic ' + self.key:
self.do_AUTHHEAD()
else:
data_string = self.rfile.read(int(self.headers['Content-Length']))
try:
response = rpc_call(data_string)
if response is not None:
self.do_HEAD()
self.wfile.write(bytes(response.encode(encoding='ascii')))
except ValueError:
self.do_INTERNALERROR()
def main():
global rpc_sock
args = parser.parse_args()
rpc_sock = args.sock
# encoding user name and password
key = base64.b64encode((args.user+':'+args.password).encode(encoding='ascii')).decode('ascii')
try:
ServerHandler.key = key
httpd = HTTPServer((args.host, args.port), ServerHandler)
if args.cert is not None:
httpd.socket = ssl.wrap_socket(httpd.socket, certfile=args.cert, server_side=True)
print('Started RPC http proxy server')
httpd.serve_forever()
except KeyboardInterrupt:
print('Shutting down server')
httpd.socket.close()
if __name__ == '__main__':
main()
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