fixes #5

.gitignore

@@ -1 +1,2 @@
 error.log
+.idea

README.md

@@ -5,13 +5,33 @@ This script forwards a number of configured local ports to local or remote socke
 ```
 git clone git@github.com:vinodpandey/python-port-forward.git
 cd python-port-forward
+
+There are 2 ways to use this script
+1. Command-line
+2. Using config file
+
+
+```
+
+## Usage: Command-line
+```
+sudo python port-forward.py <local incoming port>:<dest hostname>:<dest port>
+
+e.g. 
+sudo python port-forward.py 80:localhost:8000
+
+```
+
+## Usage: Using config file
+```
 # update port-forward.config file
 # default port forward is localhost:80 > localhost:8080 (80 localhost 8080)
 sudo python port-forward.py
 
 # with default port-forward.config, access: http://localhost/ -> this should now show content from http://localhost:8080/
 # you can run a test python http server using below command to check the default configuration
 # python -m SimpleHTTPServer 8080
+
 ```
 
 ## Configuration:

port-forward.py

@@ -21,12 +21,18 @@
 import thread
 import time
 
-def main(setup, error):
+def main(setup, error, args):
     # open file for error messages
     sys.stderr = file(error, 'a')
-    # read settings for port forwarding
-    for settings in parse(setup):
-        thread.start_new_thread(server, settings)
+
+    # if args
+    if (len(args) > 0):
+        for settings in parse_args(args):
+            thread.start_new_thread(server, settings)
+    else:
+        # read settings for port forwarding
+        for settings in parse(setup):
+            thread.start_new_thread(server, settings)
     # wait for <ctrl-c>
     while True:
        time.sleep(60)
@@ -42,6 +48,13 @@ def parse(setup):
         settings.append((int(parts[0]), parts[1], int(parts[2])))
     return settings
 
+def parse_args(args):
+    settings = list()
+    for line in args:
+        parts = line.split(":")
+        settings.append((int(parts[0]), parts[1], int(parts[2])))
+    return settings
+
 def server(*settings):
     try:
         dock_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
@@ -67,4 +80,4 @@ def forward(source, destination):
             destination.shutdown(socket.SHUT_WR)
 
 if __name__ == '__main__':
-    main('port-forward.config', 'error.log')
+    main('port-forward.config', 'error.log', sys.argv[1:])