Book Image

Hands-On Network Programming with C

By : Lewis Van Winkle
Book Image

Hands-On Network Programming with C

By: Lewis Van Winkle

Overview of this book

Network programming enables processes to communicate with each other over a computer network, but it is a complex task that requires programming with multiple libraries and protocols. With its support for third-party libraries and structured documentation, C is an ideal language to write network programs. Complete with step-by-step explanations of essential concepts and practical examples, this C network programming book begins with the fundamentals of Internet Protocol, TCP, and UDP. You’ll explore client-server and peer-to-peer models for information sharing and connectivity with remote computers. The book will also cover HTTP and HTTPS for communicating between your browser and website, and delve into hostname resolution with DNS, which is crucial to the functioning of the modern web. As you advance, you’ll gain insights into asynchronous socket programming and streams, and explore debugging and error handling. Finally, you’ll study network monitoring and implement security best practices. By the end of this book, you’ll have experience of working with client-server applications and be able to implement new network programs in C. The code in this book is compatible with the older C99 version as well as the latest C18 and C++17 standards. You’ll work with robust, reliable, and secure code that is portable across operating systems, including Winsock sockets for Windows and POSIX sockets for Linux and macOS.
Table of Contents (26 chapters)
Title Page
About Packt

Chapter 6, Building a Simple Web Client

  1. Does HTTP use TCP or UDP?

HTTP runs over TCP port 80.

  1. What types of resources can be sent over HTTP?

HTTP can be used to transfer essentially any computer file. It's commonly used for web pages (HTML) and the associated files (such as styles, scripts, fonts, and images).

  1. What are the common HTTP request types?

GET, POST, and HEAD are the most common HTTP request types.

  1. What HTTP request type is typically used to send data from the server to the client?

GET is the usual request type for a client to request a resource from the server.

  1. What HTTP request type is typically used to send data from the client to the server?

POST is used when the client needs to send data to the server.

  1. What are the two common methods used to determine an HTTP response body length?

The HTTP body length is commonly determined by the Content-Length header or by using Transfer-Encoding: chunked.

  1. How is the HTTP request body formatted for a POST-type HTTP request?

This is determined by the application. The client should set the Content-Type header to specify which format it is using. application/x-www-form-urlencoded and application/json are common values.