Exit Zen
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Sophisticated servers may wish to defer the choice of the Body template type until after the header is available. Then, a body type may be chosen depending on the header contents. For example, depending on the verb, target path, or target query parameters. To accomplish this, a parser is declared to read in the header only, using a trivial body type such as [link beast.ref.boost__beast__http__empty_body `empty_body`]. Then, a new parser is constructed from this existing parser where the body type is conditionally determined by information from the header or elsewhere.
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Boost.Asio provides various methods for loading certificate authority certificates:
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Authors using Beast can reuse the library's primitives to create their own initiating functions for performing a series of other, intermediate asynchronous operations before invoking a final completion handler. The set of intermediate actions produced by an initiating function is known as a [@http://blog.think-async.com/2009/08/composed-operations-coroutines-and-code.html ['composed operation]]. To ensure full interoperability and well-defined behavior, __Asio__ imposes requirements on the implementation of composed operations. These classes and functions make it easier to develop initiating functions and their composed operations:
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* [*Symmetry:] Algorithms are role-agnostic; build clients, servers, or both.
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The initiating function contains a few relatively simple parts. There is the customization of the return value type, static type checking, building the return value type using the helper, and creating and launching the `echo_op` composed operation object.
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Definition
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If a Secure WebSockets stream is desired, this is accomplished simply by changing the type of the next layer and adjusting the constructor arguments to match:
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To use these helper classes, first serialize the header portion of the message using the standard interface. Then prepare the buffers, chunk extensions, and desired trailers, and use them with these helpers:
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* The HTTP message has a `Content-Length` header, and the body is fully
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The detection function above is suitably generic and targeted in focus that it may be used as a building block to create higher level abstractions. Our goal is to create a ['stream algorithm]: a function which is invoked with a stream, that reads or writes (or both) to achieve a purpose. In this case, to detect the TLS client handshake. Stream algorithms may be synchronous or asynchronous. Because synchronous algorithms are easier to write, we start there. Then we build the asynchronous version, trying to model it similarly to make reasoning about it easier.
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HTTP, synchronous
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__new__ indicates an item that was recently added.
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Description
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Description
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Requests
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A vendor supplies a program called a [@https://en.wikipedia.org/wiki/Device_driver ['device driver]], enabling networking hardware such as an [@https://en.wikipedia.org/wiki/Network_interface_controller ['ethernet adaptor]] to talk to the operating system. This in turn permits running programs to interact with networking using various flavors of interfaces such as [@https://en.wikipedia.org/wiki/Berkeley_sockets ['Berkeley sockets]] or [@https://en.wikipedia.org/wiki/Winsock ['Windows Sockets 2]] ("Winsock").
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Split Serialization
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string ID 25
type: variablelist cell
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The functions [link beast.ref.boost__beast__http__read `read`], [link beast.ref.boost__beast__http__read_header `read_header`], [link beast.ref.boost__beast__http__read_some `read_some`], [link beast.ref.boost__beast__http__async_read `async_read`], [link beast.ref.boost__beast__http__async_read_header `async_read_header`], and [link beast.ref.boost__beast__http__async_read_some `async_read_some`] read HTTP/1 message data from a [link beast.concepts.streams stream].
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Description
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* Receive a message incrementally: bounded work in each I/O cycle.
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