Your task is to write (some parts of) a multi-threaded HTTP multipart downloader program.

There are two parts:

Part 1 a minimal HTTP client

Part 2 a concurrent queue using semaphores.

Part 3 determining chunk sizes and the number of partial downloads required

Part 4 merging & removing partial content files

A downloader is written in terms of these parts and you will do some analysis and write a short report.

All the programs can be compiled using a Makefile provided simply by going to the base directory where you unpack the assignment and typing make

Guidelines

• No more than 3 levels of nesting in any function and less than 40 lines of code
• Use minimum amount of code required
• Do not modify any code outside of c, queue.c and downloader.c (or the test programs which you may modify to improve but they will not be marked), otherwise your submission will fail to compile (and you will receive zero marks)
• All memory allocated during the programs execution should be free()ed and all resources, files, sockets should be closed before the program finishes. Check your program with valgrind leakcheck=all to be sure!
• Comment code as necessary, excessive commenting is not required but anything not obvious should be documented
• Marks will be awarded for clean code and documentation