Proxy Server

A proxy server for Node.js submitted as prework for CoderSchool.

Time Spent: 4 hours

Completed:

• Required: Requests to port 8000 are echoed back with the same HTTP headers and body
• Required: Requests/reponses are proxied to/from the destination server
• Required: The destination server is configurable via the --host, --port or --url arguments
• Required: The destination server is configurable via the x-destination-url header
• Required: Client requests and respones are printed to stdout
• Required: The --logfile argument outputs all logs to the file specified instead of stdout
• [] Optional: The --exec argument proxies stdin/stdout to/from the destination program
• [] Optional: The --loglevel argument sets the logging chattiness
• [] Optional: Supports HTTPS
• [] Optional: -h argument prints CLI API

Walkthrough Gif:

https://github.com/tanham/proxy-server/blob/master/proxy-walkthrough.gif

Starting the Server

npm start

Features

Echo Server:

* Rebuilt URL to: http://127.0.0.1:8000/
*   Trying 127.0.0.1...
* Connected to 127.0.0.1 (127.0.0.1) port 8000 (#0)
> POST / HTTP/1.1
> Host: 127.0.0.1:8000
> User-Agent: curl/7.43.0
> Accept: */*
> x-asdf: yodawg
> Content-Length: 10
> Content-Type: application/x-www-form-urlencoded
> 
* upload completely sent off: 10 out of 10 bytes
< HTTP/1.1 200 OK
< host: 127.0.0.1:8000
< user-agent: curl/7.43.0
< accept: */*
< x-asdf: yodawg
< content-length: 10
< content-type: application/x-www-form-urlencoded
< Date: Thu, 20 Oct 2016 10:45:36 GMT
< Connection: keep-alive
< 
* Connection #0 to host 127.0.0.1 left intact

Proxy Server:

Port 8001 will proxy to the echo server on port 8000.

Tanishas-MacBook-Pro:~ tanishahampden$ curl -v http://127.0.0.1:9000/asdf -d "hello proxy"
*   Trying 127.0.0.1...
* Connected to 127.0.0.1 (127.0.0.1) port 9000 (#0)
> POST /asdf HTTP/1.1
> Host: 127.0.0.1:9000
> User-Agent: curl/7.43.0
> Accept: */*
> Content-Length: 11
> Content-Type: application/x-www-form-urlencoded
> 
* upload completely sent off: 11 out of 11 bytes
< HTTP/1.1 200 OK
< host: 127.0.0.1:8000
< user-agent: curl/7.43.0
< accept: */*
< content-length: 11
< content-type: application/x-www-form-urlencoded
< connection: close
< date: Thu, 20 Oct 2016 10:50:08 GMT
< 
* Closing connection 0

Configuration:

CLI Arguments:

The following CLI arguments are supported:

--host

The host of the destination server. Defaults to 127.0.0.1.

--port

The port of the destination server. Defaults to 80 or 8000 when a host is not specified.

--url

A single url that overrides the above. E.g., http://www.google.com

--logfile

Specify a file path to redirect logging to.

Headers

The follow http header(s) are supported:

x-destination-url

Specify the destination url on a per request basis. Overrides and follows the same format as the --url argument.

Reflections

• I would like to return to this app and attempt the optionals.

• I need to untrack node_modules folder