Boost.Asio C++ Network Programming Cookbook by Dmytro Radchuk

By Dmytro Radchuk

Beginning with recipes demonstrating the execution of easy Boost.Asio operations, the e-book is going directly to supply ready-to-use implementations of customer and server functions from basic synchronous ones to robust multithreaded scalable options. ultimately, you're offered with complicated issues comparable to enforcing a talk software, imposing an HTTP shopper, and including SSL aid. the entire samples provided within the publication are able to be utilized in genuine initiatives simply out of the box.

As good as very good sensible examples, the ebook additionally contains prolonged supportive theoretical fabric on disbursed software layout and construction.

What you'll learn:
- increase your operating wisdom of 1 of the main respected C++ networking libraries―Boost.Asio
- get yourself up to speed with the fundamentals of TCP and UDP protocols
- Create scalable and highly-efficient buyer and server applications
- comprehend the idea at the back of improvement of dispensed applications
- bring up the protection of your disbursed purposes through including SSL support
- enforce a HTTP purchaser easily
- Use iostreams, scatter-gather buffers, and timers

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Extra resources for Boost.Asio C++ Network Programming Cookbook

Example text

The asio::connect() function opens the socket before connecting it to each endpoint specifying proper protocol object and closes it if the connection fails. All other steps in the code sample should not be difficult to understand, therefore no explanation is provided. See also ff The Creating an endpoint recipe provides more information on endpoints ff The Creating an active socket recipe explains how to create and open a socket and provides more details about the asio::io_service class ff The Resolving a DNS name recipe explains how to use a resolver class to resolve a DNS name ff The Binding a socket recipe provides more information about socket binding Accepting connections When the client application wants to communicate to the server application over a TCP protocol, it first needs to establish a logical connection with that server.

In this case, we first need to resolve the DNS name using the resolve() method provided by the asio::ip::tcp::resolver class. This method resolves a DNS name, creates an object of the asio::ip::tcp::endpoint class from each IP address resulted from resolution, puts all endpoint objects in a collection, and returns an object of the asio::ip::tcp::resolve r::iterator class, which is an iterator pointing to the first element in the collection. When a DNS name resolves to multiple IP addresses, the client application—when deciding to which one to connect—usually has no reasons to prefer one IP address to any other.

This line implements steps 1 and 2 of the algorithm. Asio I/O methods and functions, it must be properly represented. Asio output functions. Asio class that represents a TCP socket: template std::size_t send(const ConstBufferSequence & buffers); As we can see, this is a template method, and it accepts an object that satisfies the requirements of the ConstBufferSeqenece concept as its argument that represents the buffer. A suitable object is a composite object that represents a collection of objects of the asio::const_buffer class and provides a typical collection interface that supports an iteration over its elements.

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