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File “doc/qbk/04_http/05_parser_streams_zh_Hans.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.
06/05/2026
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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:
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Incremental Read __example__
Incremental Read __example__
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The parser contains a message constructed internally. Arguments passed to the parser's constructor are forwarded into the message container. The caller can access the message inside the parser by calling [link beast.ref.boost__beast__http__parser.get `parser::get`]. If the `Fields` and `Body` types are [*MoveConstructible], the caller can take ownership of the message by calling [link beast.ref.boost__beast__http__parser.release `parser::release`]. In this example we read an HTTP response with a string body using a parser, then print the response:
The parser contains a message constructed internally. Arguments passed to the parser's constructor are forwarded into the message container. The caller can access the message inside the parser by calling [link beast.ref.boost__beast__http__parser.get `parser::get`]. If the `Fields` and `Body` types are [*MoveConstructible], the caller can take ownership of the message by calling [link beast.ref.boost__beast__http__parser.release `parser::release`]. In this example we read an HTTP response with a string body using a parser, then print the response:
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As with message stream operations, parser stream operations require a persisted __DynamicBuffer__ for holding unused octets from the stream. The basic parser implementation is optimized for the case where this dynamic buffer stores its input sequence in a single contiguous memory buffer. It is advised to use an instance of __flat_buffer__, __flat_static_buffer__, or __flat_static_buffer_base__ for this purpose, although a user defined instance of __DynamicBuffer__ which produces input sequences of length one is also suitable.
As with message stream operations, parser stream operations require a persisted __DynamicBuffer__ for holding unused octets from the stream. The basic parser implementation is optimized for the case where this dynamic buffer stores its input sequence in a single contiguous memory buffer. It is advised to use an instance of __flat_buffer__, __flat_static_buffer__, or __flat_static_buffer_base__ for this purpose, although a user defined instance of __DynamicBuffer__ which produces input sequences of length one is also suitable.
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Read some octets into a parser asynchronously from an __AsyncReadStream__.
Read some octets into a parser asynchronously from an __AsyncReadStream__.
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[link beast.ref.boost__beast__http__async_read_some [*async_read_some]]
[link beast.ref.boost__beast__http__async_read_some [*async_read_some]]
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Read some octets into a parser from a __SyncReadStream__.
Read some octets into a parser from a __SyncReadStream__.
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[link beast.ref.boost__beast__http__read_some.overload1 [*read_some]]
[link beast.ref.boost__beast__http__read_some.overload1 [*read_some]]
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Read only the header octets into a parser asynchronously from an __AsyncReadStream__.
Read only the header octets into a parser asynchronously from an __AsyncReadStream__.
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[link beast.ref.boost__beast__http__async_read_header [*async_read_header]]
[link beast.ref.boost__beast__http__async_read_header [*async_read_header]]
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Read only the header octets into a parser from a __SyncReadStream__.
Read only the header octets into a parser from a __SyncReadStream__.
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[link beast.ref.boost__beast__http__read_header.overload1 [*read_header]]
[link beast.ref.boost__beast__http__read_header.overload1 [*read_header]]
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Read everything into a parser asynchronously from an __AsyncReadStream__.
Read everything into a parser asynchronously from an __AsyncReadStream__.
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[link beast.ref.boost__beast__http__async_read.overload1 [*async_read]]
[link beast.ref.boost__beast__http__async_read.overload1 [*async_read]]
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Read everything into a parser from a __SyncReadStream__.
Read everything into a parser from a __SyncReadStream__.
06/05/2026
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[link beast.ref.boost__beast__http__read.overload1 [*read]]
[link beast.ref.boost__beast__http__read.overload1 [*read]]
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