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xahaud/doc/types/Parser.qbk
Vinnie Falco 20dfecd2b6 HTTP improvements:
* Increased code coverage

* New Body concepts:
    is_Body
    is_ReadableBody
    is_WritableBody
2016-05-25 12:00:14 -04:00

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[/
Copyright (c) 2013-2016 Vinnie Falco (vinnie dot falco at gmail dot com)
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
]
[section:Parser Parser]
A [*`Parser`] is used to deserialize HTTP/1 messages from [link beast.types.streams streams].
Objects of this type are used with [link beast.ref.http__parse http::parse] and
[link beast.ref.http__async_parse http::async_parse].
In this table:
* `X` denotes a type meeting the requirements of [*`Parser`].
* `a` denotes a value of type `X`.
* `b` is a value meeting the requirements of [@http://www.boost.org/doc/libs/1_61_0/doc/html/boost_asio/reference/ConvertibleToConstBuffer.html [*`ConvertibleToConstBuffer`]].
* `ec` is a value of type [link beast.ref.error_code `error_code&`].
[table Parser requirements
[[operation] [type] [semantics, pre/post-conditions]]
[
[`a.complete()`]
[`bool`]
[
Returns `true` when a complete HTTP/1 message has been parsed.
]
]
[
[`a.write(b, ec)`]
[`std::size_t`]
[
Parses the octets in the specified input buffer sequentially until
an error occurs, the end of the buffer is reached, or a complete
HTTP/1 message has been parsed. If an error occurs, `ec` is set
to the error code and parsing stops. This function returns the
number of bytes consumed from the input buffer.
]
]
[
[`a.write_eof(ec)`]
[`void`]
[
Indicates to the parser that no more octets will be available.
Typically this function is called when the end of stream is reached.
For example, if a call to `boost::asio::ip::tcp::socket::read_some`
generates a `boost::asio::error::eof` error. Some HTTP/1 messages
determine the end of the message body by an end of file marker or
closing of the connection.
]
]
]
[endsect]