Boost Beast Translation (zh_Hans)/Doc / Qbk / 04 Http / 03 Streams (qbk) — Chinese (Simplified Han script) @ Boost-Weblate: Message Stream Operations

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doc/qbk/04_http/03_streams_zh_Hans.qbk, string 3

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Key	English	Chinese (Simplified Han script)
10	Message Stream Operations	Message Stream Operations
	Beast provides synchronous and asynchronous algorithms to parse and serialize HTTP/1 wire format messages on streams. These functions form the message-oriented stream interface:	Beast provides synchronous and asynchronous algorithms to parse and serialize HTTP/1 wire format messages on streams. These functions form the message-oriented stream interface:
16	Message Stream Operations	Message Stream Operations
	Name	Name
	Description	Description
	[link beast.ref.boost__beast__http__read.overload3 [*read]]	[link beast.ref.boost__beast__http__read.overload3 [*read]]
	Read a __message__ from a __SyncReadStream__.	Read a __message__ from a __SyncReadStream__.
	[link beast.ref.boost__beast__http__async_read.overload2 [*async_read]]	[link beast.ref.boost__beast__http__async_read.overload2 [*async_read]]
	Read a __message__ from an __AsyncReadStream__.	Read a __message__ from an __AsyncReadStream__.
	[link beast.ref.boost__beast__http__write.overload1 [*write]]	[link beast.ref.boost__beast__http__write.overload1 [*write]]
	Write a __message__ to a __SyncWriteStream__.	Write a __message__ to a __SyncWriteStream__.
	[link beast.ref.boost__beast__http__async_write [*async_write]]	[link beast.ref.boost__beast__http__async_write [*async_write]]
	Write a __message__ to an __AsyncWriteStream__.	Write a __message__ to an __AsyncWriteStream__.
	All synchronous stream operations come in two varieties. One which throws an exception upon error, and another which accepts as the last parameter an argument of type [link beast.ref.boost__beast__error_code `error_code&`]. If an error occurs this argument will be set to contain the error code.	All synchronous stream operations come in two varieties. One which throws an exception upon error, and another which accepts as the last parameter an argument of type [link beast.ref.boost__beast__error_code `error_code&`]. If an error occurs this argument will be set to contain the error code.
	Reading	Reading
	Because a serialized header is not length-prefixed, algorithms which parse messages from a stream may read past the end of a message for efficiency. To hold this surplus data, all stream read operations use a passed-in __DynamicBuffer__ which must be persisted between calls until the end of stream is reached or the stream object is destroyed. Each read operation may consume bytes remaining in the buffer, and leave behind new bytes. In this example we declare the buffer and a message variable, then read a complete HTTP request synchronously:	Because a serialized header is not length-prefixed, algorithms which parse messages from a stream may read past the end of a message for efficiency. To hold this surplus data, all stream read operations use a passed-in __DynamicBuffer__ which must be persisted between calls until the end of stream is reached or the stream object is destroyed. Each read operation may consume bytes remaining in the buffer, and leave behind new bytes. In this example we declare the buffer and a message variable, then read a complete HTTP request synchronously:
	This example uses __flat_buffer__. Beast's __basic_parser__ is optimized for structured HTTP data located in a single contiguous (['flat]) memory buffer. When not using a flat buffer the implementation may perform an additional memory allocations to restructure the input into a single buffer for parsing.	This example uses __flat_buffer__. Beast's __basic_parser__ is optimized for structured HTTP data located in a single contiguous (['flat]) memory buffer. When not using a flat buffer the implementation may perform an additional memory allocations to restructure the input into a single buffer for parsing.
	Other Implementations of __DynamicBuffer__ may avoid parser	Other Implementations of __DynamicBuffer__ may avoid parser

Key	English	Chinese (Simplified Han script)
	Writing	Writing
	Messages may also be read asynchronously. When performing asynchronous stream read operations the stream, buffer, and message variables must remain valid until the operation has completed. Beast asynchronous initiation functions use Asio's completion handler model. This call reads a message asynchronously and reports the error code upon completion. The handler is called with the error, set to any that occurs, and the number of bytes parsed. This number may be used to measure the relative amount of work performed, or it may be ignored as this example shows.	Messages may also be read asynchronously. When performing asynchronous stream read operations the stream, buffer, and message variables must remain valid until the operation has completed. Beast asynchronous initiation functions use Asio's completion handler model. This call reads a message asynchronously and reports the error code upon completion. The handler is called with the error, set to any that occurs, and the number of bytes parsed. This number may be used to measure the relative amount of work performed, or it may be ignored as this example shows.
	If a read stream algorithm cannot complete its operation without exceeding the maximum specified size of the dynamic buffer provided, the error [link beast.ref.boost__beast__http__error `buffer_overflow`] is returned. This is one technique which may be used to impose a limit on the maximum size of an HTTP message header for protection from buffer overflow attacks. The following code will print the error message:	If a read stream algorithm cannot complete its operation without exceeding the maximum specified size of the dynamic buffer provided, the error [link beast.ref.boost__beast__http__error `buffer_overflow`] is returned. This is one technique which may be used to impose a limit on the maximum size of an HTTP message header for protection from buffer overflow attacks. The following code will print the error message:
	[link beast.ref.boost__beast__http__async_read.overload2 [*async_read]]	[link beast.ref.boost__beast__http__async_read.overload2 [*async_read]]
	Read a __message__ from an __AsyncReadStream__.	Read a __message__ from an __AsyncReadStream__.
	[link beast.ref.boost__beast__http__write.overload1 [*write]]	[link beast.ref.boost__beast__http__write.overload1 [*write]]
	Write a __message__ to a __SyncWriteStream__.	Write a __message__ to a __SyncWriteStream__.
	[link beast.ref.boost__beast__http__async_write [*async_write]]	[link beast.ref.boost__beast__http__async_write [*async_write]]
	Write a __message__ to an __AsyncWriteStream__.	Write a __message__ to an __AsyncWriteStream__.
	All synchronous stream operations come in two varieties. One which throws an exception upon error, and another which accepts as the last parameter an argument of type [link beast.ref.boost__beast__error_code `error_code&`]. If an error occurs this argument will be set to contain the error code.	All synchronous stream operations come in two varieties. One which throws an exception upon error, and another which accepts as the last parameter an argument of type [link beast.ref.boost__beast__error_code `error_code&`]. If an error occurs this argument will be set to contain the error code.
	Reading	Reading
	Because a serialized header is not length-prefixed, algorithms which parse messages from a stream may read past the end of a message for efficiency. To hold this surplus data, all stream read operations use a passed-in __DynamicBuffer__ which must be persisted between calls until the end of stream is reached or the stream object is destroyed. Each read operation may consume bytes remaining in the buffer, and leave behind new bytes. In this example we declare the buffer and a message variable, then read a complete HTTP request synchronously:	Because a serialized header is not length-prefixed, algorithms which parse messages from a stream may read past the end of a message for efficiency. To hold this surplus data, all stream read operations use a passed-in __DynamicBuffer__ which must be persisted between calls until the end of stream is reached or the stream object is destroyed. Each read operation may consume bytes remaining in the buffer, and leave behind new bytes. In this example we declare the buffer and a message variable, then read a complete HTTP request synchronously:
	This example uses __flat_buffer__. Beast's __basic_parser__ is optimized for structured HTTP data located in a single contiguous (['flat]) memory buffer. When not using a flat buffer the implementation may perform an additional memory allocations to restructure the input into a single buffer for parsing.	This example uses __flat_buffer__. Beast's __basic_parser__ is optimized for structured HTTP data located in a single contiguous (['flat]) memory buffer. When not using a flat buffer the implementation may perform an additional memory allocations to restructure the input into a single buffer for parsing.
	Other Implementations of __DynamicBuffer__ may avoid parser	Other Implementations of __DynamicBuffer__ may avoid parser
10	Message Stream Operations	Message Stream Operations
16	Message Stream Operations	Message Stream Operations

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