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README.md
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alice30.txt
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webserver_404.pcapng
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README.md

Simple Web Server

For this project you are going to write a simple web server using Python sockets only (i.e. no Flask, not even http.server). Your server should have the following functionality:

  1. Bind to TCP port 4300 on 127.0.0.2 and accept 1 request at a time.
  2. Serve a single file, alice30.txt.
  3. Log details of each incoming request to webserver.log.
  4. Return 405 Method Not Allowed error for any method other than GET
  5. Return 404 Not Found error for any request other than /alice30.txt.
  6. Send the content of alice30.txt to the client along with proper response header.

Request

A typical request header sent by a browser (Chrome in this case) looks as follows:

GET /alice30.txt HTTP/1.1
Host: 127.0.0.2:4300
Connection: keep-alive
Pragma: no-cache
Cache-Control: no-cache
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8
Accept-Encoding: gzip, deflate, br
Accept-Language: en-US,en;q=0.9

Use curl to initiate a POST request and see a 405 error:

curl -X POST http://127.0.0.2:4300/alice30.txt

Log

Log file should contain the following information:

  1. Time of the request.
  2. Requested file.
  3. IP address of the client.
  4. Browser vendor and version.
2018-11-05 09:10:52.906984 | /alice.txt | 127.0.0.1 | Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36
2018-11-05 09:12:18.072352 | /alice30.txt | 127.0.0.1 | Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36
2018-11-05 09:15:00.526359 | /alice.txt | 127.0.0.1 | Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36
2018-11-05 09:21:58.869701 | /alice.txt | 127.0.0.1 | Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36
2018-11-05 09:22:06.622828 | /alice30.txt | 127.0.0.1 | Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36

Response

Your server must include the following headers in the response:

  1. HTTP version: 1.1
  2. Response code: 200 OK
  3. Content-Length: length of alice30.txt.
  4. Content-Type: plain text (not html).
  5. Date: current date
  6. Last-Modified: Friday, August 29, 2018 11:00 AM
  7. Server: must include your name

The response header sent by your server should look as follows (date and server are going to be different):

HTTP/1.1 200 OK
Content-Length: 148545
Content-Type: text/plain; charset=utf-8
Date: Sun Nov  4 23:25:40 2018
Last-Modified: Wed Aug 29 11:00:00 2018
Server: CS430-ROMAN

References