Boost Beast Translation (zh_Hans)/Doc / Qbk / 07 Concepts / Fields (qbk) — Chinese (Simplified Han script) @ Boost-Weblate: Semantics, Pre/Post-conditions

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Key	English	Chinese (Simplified Han script)
	Fields	字段
	An instance of [*Fields] is a container for holding HTTP header fields and their values. The implementation also calls upon the container to store the request target and non-standard strings for method and obsolete reason phrase as needed. Types which meet these requirements can always be serialized.	`Fields` 的实例是一个用于存储 HTTP 报文字段及其值的容器。该实现还会根据需要调用此容器来存储请求目标，以及非标准的方法字符串和过时的原因短语字符串。满足这些要求的类型始终可以进行序列化。
	Associated Types	关联类型
	* [link beast.ref.boost__beast__http__is_fields `is_fields`] * __FieldsWriter__	* [link beast.ref.boost__beast__http__is_fields `is_fields`] * __FieldsWriter__
	Requirements	要求
	In this table:	在下表中:
	* `F` denotes a type that meets the requirements of [Fields]. `W` denotes a type meeting the requirements of __FieldsWriter__. * `a` denotes a value of type `F`. * `c` denotes a (possibly const) value of type `F`. * `b` is a value of type `bool` * `n` is a value of type `boost::optional<std::uint64_t>`. * `s` is a value of type [link beast.ref.boost__beast__string_view `string_view`]. * `v` is a value of type `unsigned int` representing the HTTP-version.	* `F` 表示满足 [Fields] 要求的类型。 `W` 表示满足 __FieldsWriter__ 要求的类型。 * `a` 表示类型为 `F` 的值。 * `c` 表示类型为 `F` 的值（可能带有 const 限定）。 * `b` 表示类型为 `bool` 的值。 * `n` 表示类型为 `boost::optional<std::uint64_t>` 的值。 * `s` 表示类型为 [link beast.ref.boost__beast__string_view `string_view`] 的值。 * `v` 表示类型为 `unsigned int` 的值，用于表示 HTTP 版本。
	Valid expressions	有效表达式
	Expression	表达式
	Type	类型
	Semantics, Pre/Post-conditions	语义，前置条件 / 后置条件
	`F::writer`	`F::writer`
	`W`	`W`
	A type which meets the requirements of __FieldsWriter__.	满足 __FieldsWriter__ 要求的类型。
	`c.get_method_impl()`	`c.get_method_impl()`
36	`string_view`
	Returns the method text. The implementation only calls this function for request headers when retrieving the method text previously set with a call to `set_method_impl` using a non-empty string.	返回方法文本。仅当使用非空字符串调用 `set_method_impl` 设置了方法文本后，在检索请求头时，实现才会调用此函数。
	`c.get_target_impl()`	`c.get_target_impl()`
	Returns the target string. The implementation only calls this function for request headers.	返回目标字符串。该函数仅在处理请求头时由实现调用。
	`c.get_reason_impl()`	`c.get_reason_impl()`
	Returns the obsolete request text. The implementation only calls this for response headers when retrieving the reason text previously set with a call to `set_reason_impl` using a non-empty string.	返回过时的请求文本。仅当使用非空字符串调用 `set_reason_impl` 设置了原因文本后，在检索响应头时，实现才会调用此函数。
	`c.get_chunked_impl()`	`c.get_chunked_impl()`
36	`bool`
	Returns `true` if the [@https://tools.ietf.org/html/rfc7230#section-3.3.1 [*Transfer-Encoding]] field value indicates that the payload is chunk encoded. Both of these conditions must be true: [itemized_list [ The Transfer-Encoding field is present in the message. ][ The last item in value of the field is "chunked". ]]	如果 [@https://tools.ietf.org/html/rfc7230#section-3.3.1 [*Transfer-Encoding]] 字段值表明负载已进行分块编码，则返回 `true`。必须同时满足以下两个条件：[itemized_list [ 消息中存在 Transfer-Encoding 字段。 ][ 该字段值的最后一项为 "chunked"。 ]]
	`c.get_keep_alive_impl(v)`	`c.get_keep_alive_impl(v)`
	Returns `true` if the semantics of the [@https://tools.ietf.org/html/rfc7230#section-6.1 [*Connection]] field and version indicate that the connection should remain open after the corresponding response is transmitted or received: [itemized_list [ If `(v < 11)` the function returns `true` if the "keep-alive" token is present in the Connection field value. Otherwise the function returns `false`. ][ If `(v == 11)`, the function returns `false` if the "close" token is present in the Connection field value. Otherwise the function returns `true`. ]]	如果 [@https://tools.ietf.org/html/rfc7230#section-6.1 [*Connection]] 字段的语义和版本表明，在发送或接收相应响应后连接应保持打开，则返回 true： [itemized_list [ 如果 (v < 11)，当 Connection 字段值中存在 "keep-alive" 标记时函数返回 true，否则返回 false。 ][ 如果 (v == 11)，当 Connection 字段值中存在 "close" 标记时函数返回 false，否则返回 true。 ]]

	English	Chinese (Simplified Han script)	Actions
	`a.set_reason_impl(s)`	`a.set_reason_impl(s)`
	Requirements	要求
	`a.set_chunked_impl(b)`	`a.set_chunked_impl(b)`
	`a.set_target_impl(s)`	`a.set_target_impl(s)`
	* `F` denotes a type that meets the requirements of [Fields]. `W` denotes a type meeting the requirements of __FieldsWriter__. * `a` denotes a value of type `F`. * `c` denotes a (possibly const) value of type `F`. * `b` is a value of type `bool` * `n` is a value of type `boost::optional<std::uint64_t>`. * `s` is a value of type [link beast.ref.boost__beast__string_view `string_view`]. * `v` is a value of type `unsigned int` representing the HTTP-version.	* `F` 表示满足 [Fields] 要求的类型。 `W` 表示满足 __FieldsWriter__ 要求的类型。 * `a` 表示类型为 `F` 的值。 * `c` 表示类型为 `F` 的值（可能带有 const 限定）。 * `b` 表示类型为 `bool` 的值。 * `n` 表示类型为 `boost::optional<std::uint64_t>` 的值。 * `s` 表示类型为 [link beast.ref.boost__beast__string_view `string_view`] 的值。 * `v` 表示类型为 `unsigned int` 的值，用于表示 HTTP 版本。
	Valid expressions	有效表达式
	Expression	表达式
	Type	类型
	Semantics, Pre/Post-conditions	语义，前置条件 / 后置条件
	`F::writer`	`F::writer`
	`W`	`W`
	A type which meets the requirements of __FieldsWriter__.	满足 __FieldsWriter__ 要求的类型。
	`c.get_method_impl()`	`c.get_method_impl()`
	Returns the method text. The implementation only calls this function for request headers when retrieving the method text previously set with a call to `set_method_impl` using a non-empty string.	返回方法文本。仅当使用非空字符串调用 `set_method_impl` 设置了方法文本后，在检索请求头时，实现才会调用此函数。
	An instance of [*Fields] is a container for holding HTTP header fields and their values. The implementation also calls upon the container to store the request target and non-standard strings for method and obsolete reason phrase as needed. Types which meet these requirements can always be serialized.	`Fields` 的实例是一个用于存储 HTTP 报文字段及其值的容器。该实现还会根据需要调用此容器来存储请求目标，以及非标准的方法字符串和过时的原因短语字符串。满足这些要求的类型始终可以进行序列化。
	`c.get_target_impl()`	`c.get_target_impl()`
	`c.get_reason_impl()`	`c.get_reason_impl()`
	Stores a copy of `s` as the target, or erases the previously stored value if `s` is empty. The implementation only calls this function for request headers. This function may throw `std::invalid_argument` if the operation is not supported by the container.	将 `s` 的副本存储为目标；若 `s` 为空，则擦除先前存储的值。此函数仅由实现对请求头进行调用。如果容器不支持该操作，函数可能会抛出 `std::invalid_argument` 异常。
	Returns the obsolete request text. The implementation only calls this for response headers when retrieving the reason text previously set with a call to `set_reason_impl` using a non-empty string.	返回过时的请求文本。仅当使用非空字符串调用 `set_reason_impl` 设置了原因文本后，在检索响应头时，实现才会调用此函数。
	`c.get_chunked_impl()`	`c.get_chunked_impl()`
	* [link beast.ref.boost__beast__http__is_fields `is_fields`] * __FieldsWriter__	* [link beast.ref.boost__beast__http__is_fields `is_fields`] * __FieldsWriter__
	In this table:	在下表中:
	Returns the target string. The implementation only calls this function for request headers.	返回目标字符串。该函数仅在处理请求头时由实现调用。
	`a.set_keep_alive_impl(v,b)`	`a.set_keep_alive_impl(v,b)`
	Adjusts the [@https://tools.ietf.org/html/rfc7230#section-3.3.2 [*Content-Length]] field value as follows: [itemized_list [ If `n` contains a value, the Content-Length field will be set to the text representation of the value. Any previous Content-Length fields are removed from the container. ][ If `n` does not contain a value, any present Content-Length fields are removed from the container. ]]	根据 [@https://tools.ietf.org/html/rfc7230#section-3.3.2 [*Content-Length]] 字段值进行如下调整： - 如果 `n` 包含一个值，则将 Content-Length 字段设置为该值的文本表示。从容器中移除任何先前存在的 Content-Length 字段。 - 如果 `n` 不包含值，则从容器中移除任何存在的 Content-Length 字段。

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Chinese (Simplified Han script) 28 characters editedCurrent translationState: Translated

06/18/2026

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Chinese (Simplified Han script) 30 characters editedPrevious translationState: Needs editing (Needs rewriting)

06/05/2026

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type: table cell

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58749

Source string location

string ID 36

String age

06/05/2026

Last updated

06/26/2026

Source string age

06/05/2026

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doc/qbk/07_concepts/Fields_zh_Hans.qbk, string 11

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