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[link beast.ref.boost__beast__http__file_body `file_body`]

[link beast.ref.boost__beast__http__basic_file_body `basic_file_body`]
[link beast.ref.boost__beast__http__file_body `file_body`]

[link beast.ref.boost__beast__http__basic_file_body `basic_file_body`]
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A special body with an empty `value_type` indicating that the message has no body. Messages with this body may be serialized and parsed; however, body octets received while parsing a message with this body will generate a unique error.
A special body with an empty `value_type` indicating that the message has no body. Messages with this body may be serialized and parsed; however, body octets received while parsing a message with this body will generate a unique error.
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[link beast.ref.boost__beast__http__empty_body `empty_body`]
[link beast.ref.boost__beast__http__empty_body `empty_body`]
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A body whose `value_type` is a __DynamicBuffer__. It inherits the insertion complexity of the underlying choice of dynamic buffer. Messages with this body type may be serialized and parsed.
A body whose `value_type` is a __DynamicBuffer__. It inherits the insertion complexity of the underlying choice of dynamic buffer. Messages with this body type may be serialized and parsed.
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[link beast.ref.boost__beast__http__dynamic_body `dynamic_body`]

[link beast.ref.boost__beast__http__basic_dynamic_body `basic_dynamic_body`]
[link beast.ref.boost__beast__http__dynamic_body `dynamic_body`]

[link beast.ref.boost__beast__http__basic_dynamic_body `basic_dynamic_body`]
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A body whose [link beast.ref.boost__beast__http__buffer_body__value_type `value_type`] holds a raw pointer and size to a caller-provided buffer. This allows for serialization of body data coming from external sources, and incremental parsing of message body content using a fixed size buffer.
A body whose [link beast.ref.boost__beast__http__buffer_body__value_type `value_type`] holds a raw pointer and size to a caller-provided buffer. This allows for serialization of body data coming from external sources, and incremental parsing of message body content using a fixed size buffer.
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[link beast.ref.boost__beast__http__buffer_body `buffer_body`]
[link beast.ref.boost__beast__http__buffer_body `buffer_body`]
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Beast defines the __Body__ concept, which determines both the type of the [link beast.ref.boost__beast__http__message.body `message::body`] member (as seen in the diagram above) and may also include algorithms for transferring buffers in and out. These algorithms are used during parsing and serialization. Users may define their own body types which meet the requirements, or use the ones that come with the library:
Beast defines the __Body__ concept, which determines both the type of the [link beast.ref.boost__beast__http__message.body `message::body`] member (as seen in the diagram above) and may also include algorithms for transferring buffers in and out. These algorithms are used during parsing and serialization. Users may define their own body types which meet the requirements, or use the ones that come with the library:
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Body Types
Body Types
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Requests and responses share the version, fields, and body but have a few members unique to the type. This is implemented by declaring the header classes as partial specializations of `isRequest`. __message__ is derived from __header__; a message may be passed as an argument to a function taking a suitably typed header as a parameter. Additionally, `header` is publicly derived from `Fields`; a message inherits all the member functions of `Fields`. This diagram shows the inheritance relationship between header and message, along with some of the notable differences in members in each partial specialization:
Requests and responses share the version, fields, and body but have a few members unique to the type. This is implemented by declaring the header classes as partial specializations of `isRequest`. __message__ is derived from __header__; a message may be passed as an argument to a function taking a suitably typed header as a parameter. Additionally, `header` is publicly derived from `Fields`; a message inherits all the member functions of `Fields`. This diagram shows the inheritance relationship between header and message, along with some of the notable differences in members in each partial specialization:
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/// A typical HTTP response header
template<class Fields>
using response_header = header<false, Fields>;
/// A typical HTTP response header
template<class Fields>
using response_header = header<false, Fields>;
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[link beast.ref.boost__beast__http__response_header `response_header`]
[link beast.ref.boost__beast__http__response_header `response_header`]
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/// A typical HTTP request header
template<class Fields>
using request_header = header<true, Fields>;
/// A typical HTTP request header
template<class Fields>
using request_header = header<true, Fields>;
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[link beast.ref.boost__beast__http__request_header `request_header`]
[link beast.ref.boost__beast__http__request_header `request_header`]
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/// An HTTP header
template<
bool isRequest, // `true` for requests, `false` for responses
class Fields = fields> // The type of container to store the fields
class header;
/// An HTTP header
template<
bool isRequest, // `true` for requests, `false` for responses
class Fields = fields> // The type of container to store the fields
class header;
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__header__
__header__
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Description
Description
66
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Name
Name
66
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Header
Header
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Sometimes it is desired to only work with a header. Beast provides a single class template __header__ and some aliases to model HTTP/1 and HTTP/2 headers:
Sometimes it is desired to only work with a header. Beast provides a single class template __header__ and some aliases to model HTTP/1 and HTTP/2 headers:
06/05/2026

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