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[link beast.ref.boost__beast__http__chunk_extensions `chunk_extensions`]

[link beast.ref.boost__beast__http__basic_chunk_extensions `basic_chunk_extensions`]
[link beast.ref.boost__beast__http__chunk_extensions `chunk_extensions`]

[link beast.ref.boost__beast__http__basic_chunk_extensions `basic_chunk_extensions`]
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A buffer sequence representing the CRLF (`"\r\n"`) delimiter. This class is used when the caller desires to emit the chunk body in two or more individual stream operations.
A buffer sequence representing the CRLF (`"\r\n"`) delimiter. This class is used when the caller desires to emit the chunk body in two or more individual stream operations.
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[link beast.ref.boost__beast__http__chunk_crlf `chunk_crlf`]
[link beast.ref.boost__beast__http__chunk_crlf `chunk_crlf`]
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A buffer sequence representing a complete chunk body.
A buffer sequence representing a complete chunk body.
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[link beast.ref.boost__beast__http__chunk_body `chunk_body`]
[link beast.ref.boost__beast__http__chunk_body `chunk_body`]
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Description
Description
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Name
Name
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Chunking Helpers
Chunking Helpers
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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:
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 __serializer__ automatically applies the chunked transfer encoding when a message returns `true` from [link beast.ref.boost__beast__http__message.chunked.overload1 `message::chunked`]. The boundaries between chunks emitted by the serializer are implementation defined. Chunk extensions and trailers are omitted. Applications which need precise control over the chunk boundaries, extensions, and trailers may use a set of helper classes which enable manual emission of message payloads using chunk encoding.
The __serializer__ automatically applies the chunked transfer encoding when a message returns `true` from [link beast.ref.boost__beast__http__message.chunked.overload1 `message::chunked`]. The boundaries between chunks emitted by the serializer are implementation defined. Chunk extensions and trailers are omitted. Applications which need precise control over the chunk boundaries, extensions, and trailers may use a set of helper classes which enable manual emission of message payloads using chunk encoding.
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Serializing Chunks
Serializing Chunks
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For message payloads whose size is not known ahead of time, HTTP version 1.1 defines the [@https://tools.ietf.org/html/rfc7230#section-4.1 ['chunked]] transfer coding. This coding consists of zero or more [@https://tools.ietf.org/html/rfc7230#section-4.1 ['chunked bodies]], followed by a [@https://tools.ietf.org/html/rfc7230#section-4.1 ['last chunk]]. Each chunked body may contain optional application-defined, connection-specific [@https://tools.ietf.org/html/rfc7230#section-4.1.1 ['chunk-extensions]]. The last chunk may contain additional HTTP field values in a section of the last chunk called a [@https://tools.ietf.org/html/rfc7230#section-4.1.2 ['chunk-trailer]]. The field values are "promised" in the header as a comma delimited list of field names in the [@https://tools.ietf.org/html/rfc7230#section-4.4 [*Trailer]] field value. Clients indicate their willingness to accept trailers by including the "trailers" token in the [@https://tools.ietf.org/html/rfc7230#section-4.3 [*TE]] field value.
For message payloads whose size is not known ahead of time, HTTP version 1.1 defines the [@https://tools.ietf.org/html/rfc7230#section-4.1 ['chunked]] transfer coding. This coding consists of zero or more [@https://tools.ietf.org/html/rfc7230#section-4.1 ['chunked bodies]], followed by a [@https://tools.ietf.org/html/rfc7230#section-4.1 ['last chunk]]. Each chunked body may contain optional application-defined, connection-specific [@https://tools.ietf.org/html/rfc7230#section-4.1.1 ['chunk-extensions]]. The last chunk may contain additional HTTP field values in a section of the last chunk called a [@https://tools.ietf.org/html/rfc7230#section-4.1.2 ['chunk-trailer]]. The field values are "promised" in the header as a comma delimited list of field names in the [@https://tools.ietf.org/html/rfc7230#section-4.4 [*Trailer]] field value. Clients indicate their willingness to accept trailers by including the "trailers" token in the [@https://tools.ietf.org/html/rfc7230#section-4.3 [*TE]] field value.
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Chunked Encoding
Chunked Encoding
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Component created
Component created (boost_endpoint) 06/05/2026
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Changes committed 06/05/2026
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Parsing of the “doc/qbk/04_http/05_parser_streams.qbk” file was enforced. 06/05/2026
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File “doc/qbk/04_http/05_parser_streams.qbk” was added. 06/05/2026
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This example presents how to increase the default limit of the response body size, thus the content larger than the default 8MB can be read.
This example presents how to increase the default limit of the response body size, thus the content larger than the default 8MB can be read.
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Reading large response body __example__
Reading large response body __example__
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This function uses [link beast.ref.boost__beast__http__buffer_body `buffer_body`] and parser stream operations to read a message body progressively using a small, fixed-size buffer:
This function uses [link beast.ref.boost__beast__http__buffer_body `buffer_body`] and parser stream operations to read a message body progressively using a small, fixed-size buffer:
06/05/2026

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