Boost Beast Translation (zh_Hans)/Doc / Qbk / 07 Concepts / Fields (qbk) — Chinese (Simplified Han script) @ Boost-Weblate: Returns `true` if the semantics of the [@https://tools.ietf.org/html/rfc7230#section-6.1 [*Connection]] field …

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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`. ]]

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Key	English	Chinese (Simplified Han script)
	Semantics, Pre/Post-conditions	Semantics, Pre/Post-conditions
	`F::writer`	`F::writer`
	`W`	`W`
	A type which meets the requirements of __FieldsWriter__.	A type which meets the requirements of __FieldsWriter__.
	`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.	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.
	`c.get_target_impl()`	`c.get_target_impl()`
	Returns the target string. The implementation only calls this function for request headers.	Returns the target string. The implementation only calls this function for request headers.
	`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.	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.
	`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". ]]	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". ]]
	`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`. ]]	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`. ]]
	`c.has_content_length()`	`c.has_content_length()`
	Returns `true` if the [@https://tools.ietf.org/html/rfc7230#section-3.3.2 [*Content-Length]] field is present.	Returns `true` if the [@https://tools.ietf.org/html/rfc7230#section-3.3.2 [*Content-Length]] field is present.
	`a.set_method_impl(s)`	`a.set_method_impl(s)`
	Stores a copy of `s` as the method text, 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.	Stores a copy of `s` as the method text, 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.
	`a.set_target_impl(s)`	`a.set_target_impl(s)`
	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.	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.
	`a.set_reason_impl(s)`	`a.set_reason_impl(s)`
	Stores a copy of `s` as the reason text, or erases the previously stored value of the reason text 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.	Stores a copy of `s` as the reason text, or erases the previously stored value of the reason text 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.
	`a.set_chunked_impl(b)`	`a.set_chunked_impl(b)`
	Adjusts the [@https://tools.ietf.org/html/rfc7230#section-3.3.1 [*Transfer-Encoding]] field value as follows: [itemized_list [ If `b` is `true`, the "chunked" token is appended to the list of encodings if it does not already appear last in the list. If the Transfer-Encoding field is absent, the field will be inserted to the container with the value "chunked". ][ If `b` is `false, the "chunked" token is removed from the list of encodings if it appears last in the list. If the result of the removal leaves the list of encodings empty, the Transfer-Encoding field shall not appear when the associated __FieldsWriter__ serializes the fields. ]] If the result of adjusting the field value produces an empty string, the field is removed from the container.	Adjusts the [@https://tools.ietf.org/html/rfc7230#section-3.3.1 [*Transfer-Encoding]] field value as follows: [itemized_list [ If `b` is `true`, the "chunked" token is appended to the list of encodings if it does not already appear last in the list. If the Transfer-Encoding field is absent, the field will be inserted to the container with the value "chunked". ][ If `b` is `false, the "chunked" token is removed from the list of encodings if it appears last in the list. If the result of the removal leaves the list of encodings empty, the Transfer-Encoding field shall not appear when the associated __FieldsWriter__ serializes the fields. ]] If the result of adjusting the field value produces an empty string, the field is removed from the container.
	`a.set_content_length_impl(n)`	`a.set_content_length_impl(n)`
	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. ]]	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. ]]
	`a.set_keep_alive_impl(v,b)`	`a.set_keep_alive_impl(v,b)`
	Adjusts the [@https://tools.ietf.org/html/rfc7230#section-6.1 [*Connection]] field value depending on the values of `v` and `b`. The field value is treated as [@https://tools.ietf.org/html/rfc7230#section-6.1 ['connection-option]] (rfc7230). [itemized_list [ If `(v < 11 && b)`, then all "close" tokens present in the value are removed, and the "keep-alive" token is added to the value if it is not already present. ][ If `(v < 11 && ! b)`, then all "close" and "keep-alive" tokens present in the value are removed. ][ If `(v == 11 && b)`, then all "keep-alive" and "close" tokens present in the value are removed. ][ If `(v == 11 && ! b)`, then all "keep-alive" tokens present in the value are removed, and the "close" token is added to the value if it is not already present. ]] If the result of adjusting the field value produces an empty string, the field is removed from the container.	Adjusts the [@https://tools.ietf.org/html/rfc7230#section-6.1 [*Connection]] field value depending on the values of `v` and `b`. The field value is treated as [@https://tools.ietf.org/html/rfc7230#section-6.1 ['connection-option]] (rfc7230). [itemized_list [ If `(v < 11 && b)`, then all "close" tokens present in the value are removed, and the "keep-alive" token is added to the value if it is not already present. ][ If `(v < 11 && ! b)`, then all "close" and "keep-alive" tokens present in the value are removed. ][ If `(v == 11 && b)`, then all "keep-alive" and "close" tokens present in the value are removed. ][ If `(v == 11 && ! b)`, then all "keep-alive" tokens present in the value are removed, and the "close" token is added to the value if it is not already present. ]] If the result of adjusting the field value produces an empty string, the field is removed from the container.
	Exemplar	Exemplar

	English	Chinese (Simplified Han script)	Actions
	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.	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.
	Semantics, Pre/Post-conditions	Semantics, Pre/Post-conditions
	`F::writer`	`F::writer`
	`W`	`W`
	A type which meets the requirements of __FieldsWriter__.	A type which meets the requirements of __FieldsWriter__.
	`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.	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.
	`c.get_target_impl()`	`c.get_target_impl()`
	Returns the target string. The implementation only calls this function for request headers.	Returns the target string. The implementation only calls this function for request headers.
	`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.	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.
	`c.get_chunked_impl()`	`c.get_chunked_impl()`
	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". ]]	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". ]]
	`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`. ]]	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`. ]]
	`c.has_content_length()`	`c.has_content_length()`
	Returns `true` if the [@https://tools.ietf.org/html/rfc7230#section-3.3.2 [*Content-Length]] field is present.	Returns `true` if the [@https://tools.ietf.org/html/rfc7230#section-3.3.2 [*Content-Length]] field is present.
	`a.set_method_impl(s)`	`a.set_method_impl(s)`
	Stores a copy of `s` as the method text, 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.	Stores a copy of `s` as the method text, 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.
	`a.set_target_impl(s)`	`a.set_target_impl(s)`
	Fields	Fields
	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.	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.
	Associated Types	Associated Types
	* [link beast.ref.boost__beast__http__is_fields `is_fields`] * __FieldsWriter__	* [link beast.ref.boost__beast__http__is_fields `is_fields`] * __FieldsWriter__
	Requirements	Requirements
	In this table:	In this table:
	Adjusts the [@https://tools.ietf.org/html/rfc7230#section-3.3.1 [*Transfer-Encoding]] field value as follows: [itemized_list [ If `b` is `true`, the "chunked" token is appended to the list of encodings if it does not already appear last in the list. If the Transfer-Encoding field is absent, the field will be inserted to the container with the value "chunked". ][ If `b` is `false, the "chunked" token is removed from the list of encodings if it appears last in the list. If the result of the removal leaves the list of encodings empty, the Transfer-Encoding field shall not appear when the associated __FieldsWriter__ serializes the fields. ]] If the result of adjusting the field value produces an empty string, the field is removed from the container.	Adjusts the [@https://tools.ietf.org/html/rfc7230#section-3.3.1 [*Transfer-Encoding]] field value as follows: [itemized_list [ If `b` is `true`, the "chunked" token is appended to the list of encodings if it does not already appear last in the list. If the Transfer-Encoding field is absent, the field will be inserted to the container with the value "chunked". ][ If `b` is `false, the "chunked" token is removed from the list of encodings if it appears last in the list. If the result of the removal leaves the list of encodings empty, the Transfer-Encoding field shall not appear when the associated __FieldsWriter__ serializes the fields. ]] If the result of adjusting the field value produces an empty string, the field is removed from the container.
	`a.set_content_length_impl(n)`	`a.set_content_length_impl(n)`
	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. ]]	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. ]]
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type: table cell

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string ID 36

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doc/qbk/07_concepts/Fields_zh_Hans.qbk, string 26

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