Boost Beast Translation (zh_Hans)/Doc / Qbk / 04 Http / 02 Message (qbk) — Chinese (Simplified Han script) @ Boost-Weblate: GET /index.htm HTTP/1.1\r\n Accept: text/html\r\n User-Agent: Beast\r\n \r\n

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Key	English	Chinese (Simplified Han script)
	A special body with an empty `value_type` indicating that the message has no body. Messages with this body may be serialized and parsed; however, body octets received while parsing a message with this body will generate a unique error.	该消息体类型为一个特殊的空消息体，其 `value_type` 为空，表示消息不包含消息体。带有该消息体类型的消息支持序列化和解析操作；但在解析过程中如果接收到消息体数据，则会生成一个特定的错误。
	[link beast.ref.boost__beast__http__file_body `file_body`] [link beast.ref.boost__beast__http__basic_file_body `basic_file_body`]	[link beast.ref.boost__beast__http__file_body `file_body`] [link beast.ref.boost__beast__http__basic_file_body `basic_file_body`]
	This body is represented by a file opened for either reading or writing. Messages with this body may be serialized and parsed. HTTP algorithms will use the open file for reading and writing, for streaming and incremental sends and receives.	该消息体类型通过一个已打开的文件来表示，可用于读取或写入。带有该消息体类型的消息支持序列化和解析操作。HTTP 算法会利用这个已打开的文件执行读写操作，从而支持流式传输及增量式数据收发。
	[link beast.ref.boost__beast__http__span_body `span_body`]	[link beast.ref.boost__beast__http__span_body `span_body`]
	A body whose `value_type` is a [@boost:/libs/core/doc/html/core/span.html `span`], a non-owning reference to a single linear buffer of bytes. Messages with this body type may be serialized and parsed.	该消息体类型的 `value_type` 为 [@boost:/libs/core/doc/html/core/span.html `span`]，这是一个指向单个线性字节缓冲区的非拥有引用。带有该消息体类型的消息可进行序列化和解析。
	[link beast.ref.boost__beast__http__string_body `string_body`] [link beast.ref.boost__beast__http__basic_string_body `basic_string_body`]	[link beast.ref.boost__beast__http__string_body `string_body`] [link beast.ref.boost__beast__http__basic_string_body `basic_string_body`]
	A body whose `value_type` is `std::basic_string` or `std::string`. Insertion complexity is amortized constant time, while capacity grows geometrically. Messages with this body type may be serialized and parsed. This is the type of body used in the examples.	该消息体类型的 `value_type` 为 `std::basic_string` 或 `std::string`。插入操作的均摊复杂度为常数时间，容量以几何级数增长。带有该消息体类型的消息支持序列化和解析操作。此类型即为示例中使用的消息体类型。
	[link beast.ref.boost__beast__http__vector_body `vector_body`]	[link beast.ref.boost__beast__http__vector_body `vector_body`]
	A body whose `value_type` is `std::vector`. Insertion complexity is amortized constant time, while capacity grows geometrically. Messages with this body type may be serialized and parsed.	该消息体类型的 `value_type` 为 `std::vector`。插入操作的均摊复杂度为常数时间，容量以几何级数增长。带有该消息体类型的消息支持序列化和解析操作。
	Usage	用法
	These examples show how to create and fill in request and response objects: Here we build an [@https://tools.ietf.org/html/rfc7231#section-4.3.1 HTTP GET] request with an empty message body:	以下示例展示如何创建并填充请求和响应对象。这里构造一个带有空消息体的 [@https://tools.ietf.org/html/rfc7231#section-4.3.1 HTTP GET] 请求：
	Create Request	创建请求
193	Statements	声明
193	Serialized Result	序列化结果
	[http_snippet_2]	[http_snippet_2]
	GET /index.htm HTTP/1.1\r\n Accept: text/html\r\n User-Agent: Beast\r\n \r\n	GET /index.htm HTTP/1.1\r\n Accept: text/html\r\n User-Agent: Beast\r\n \r\n
	In this code we create an HTTP response with a status code indicating success. This message has a body with a non-zero length. The function [link beast.ref.boost__beast__http__message.prepare_payload `message::prepare_payload`] automatically sets the Content-Length or Transfer-Encoding field depending on the content and type of the `body` member. Use of this function is optional; these fields may also be set explicitly.	以下代码创建一个带有成功状态码的 HTTP 响应。该消息包含一个非空的消息体。prepare_payload 函数会根据 body 成员的内容和类型自动设置 Content-Length 或 Transfer-Encoding 字段。该函数可调用也可不调用；这些字段也可手动显式设置。
	Create Response	创建响应
214	Statements	声明
214	Serialized Result	序列化结果
	[http_snippet_3]	[http_snippet_3]
	HTTP/1.1 200 OK\r\n Server: Beast\r\n Content-Length: 13\r\n \r\n Hello, world!	HTTP/1.1 200 OK\r\n Server: Beast\r\n Content-Length: 13\r\n \r\n Hello, world!
	The implementation will automatically fill in the obsolete [@https://tools.ietf.org/html/rfc7230#section-3.1.2 reason-phrase] from the status code when serializing a message. Or it may be set directly using [link beast.ref.boost__beast__http__header.reason.overload2 `header::reason`].	当序列化消息时，实现会根据状态码自动填充已废弃的 [@https://tools.ietf.org/html/rfc7230#section-3.1.2 原因短语]。也可通过调用 [link beast.ref.boost__beast__http__header.reason.overload2 `header::reason`] 直接设置该字段。

	English	Chinese (Simplified Han script)	Actions
	/// A typical HTTP response header template<class Fields> using response_header = header<false, Fields>;	/// 典型的 HTTP 响应头部 template<class Fields> using response_header = header<false, Fields>;
	/// A typical HTTP request template<class Body, class Fields = fields> using request = message<true, Body, Fields>;	/// 典型的 HTTP 请求 template<class Body, class Fields = fields> using request = message<true, Body, Fields>;
	/// A typical HTTP response template<class Body, class Fields = fields> using response = message<false, Body, Fields>;	/// 典型的 HTTP 响应 template<class Body, class Fields = fields> using response = message<false, Body, Fields>;
	Beast provides a single class template __message__ and some aliases which model HTTP/1 and [@https://tools.ietf.org/html/rfc7540 HTTP/2] messages:	Beast 提供单个类模板 __message__ 及若干别名，用于表示 HTTP/1 和 HTTP/2 消息：
	Message Containers	消息容器
	/// An HTTP message template< bool isRequest, // `true` for requests, `false` for responses class Body, // Controls the container and algorithms used for the body class Fields = fields> // The type of container to store the fields class message;	/// HTTP 消息类 template< bool isRequest, // 若为请求则为 true，若为响应则为 false class Body, // 用于控制消息体的容器及算法 class Fields = fields> // 用于存储字段的容器类型 class message;
	[link beast.ref.boost__beast__http__request `request`]	[link beast.ref.boost__beast__http__request `request`]
	This body is represented by a file opened for either reading or writing. Messages with this body may be serialized and parsed. HTTP algorithms will use the open file for reading and writing, for streaming and incremental sends and receives.	该消息体类型通过一个已打开的文件来表示，可用于读取或写入。带有该消息体类型的消息支持序列化和解析操作。HTTP 算法会利用这个已打开的文件执行读写操作，从而支持流式传输及增量式数据收发。
	A body whose `value_type` is `std::basic_string` or `std::string`. Insertion complexity is amortized constant time, while capacity grows geometrically. Messages with this body type may be serialized and parsed. This is the type of body used in the examples.	该消息体类型的 `value_type` 为 `std::basic_string` 或 `std::string`。插入操作的均摊复杂度为常数时间，容量以几何级数增长。带有该消息体类型的消息支持序列化和解析操作。此类型即为示例中使用的消息体类型。
	These examples show how to create and fill in request and response objects: Here we build an [@https://tools.ietf.org/html/rfc7231#section-4.3.1 HTTP GET] request with an empty message body:	以下示例展示如何创建并填充请求和响应对象。这里构造一个带有空消息体的 [@https://tools.ietf.org/html/rfc7231#section-4.3.1 HTTP GET] 请求：
	Create Response	创建响应
	[http_snippet_3]	[http_snippet_3]
	HTTP/1.1 200 OK\r\n Server: Beast\r\n Content-Length: 13\r\n \r\n Hello, world!	HTTP/1.1 200 OK\r\n Server: Beast\r\n Content-Length: 13\r\n \r\n Hello, world!
	The implementation will automatically fill in the obsolete [@https://tools.ietf.org/html/rfc7230#section-3.1.2 reason-phrase] from the status code when serializing a message. Or it may be set directly using [link beast.ref.boost__beast__http__header.reason.overload2 `header::reason`].	当序列化消息时，实现会根据状态码自动填充已废弃的 [@https://tools.ietf.org/html/rfc7230#section-3.1.2 原因短语]。也可通过调用 [link beast.ref.boost__beast__http__header.reason.overload2 `header::reason`] 直接设置该字段。
	Usage	用法
	Requests and responses share the version, fields, and body but have a few members unique to the type. This is implemented by declaring the header classes as partial specializations of `isRequest`. __message__ is derived from __header__; a message may be passed as an argument to a function taking a suitably typed header as a parameter. Additionally, `header` is publicly derived from `Fields`; a message inherits all the member functions of `Fields`. This diagram shows the inheritance relationship between header and message, along with some of the notable differences in members in each partial specialization:	请求和响应共享版本号、字段及消息体，但各自拥有一些特有的成员。该设计通过将 `header` 类声明为 `isRequest` 的偏特化来实现。__message__ 派生自 __header__，因此消息可作为参数传递给接受相应类型头部参数的函数。此外，`header` 公开继承自 `Fields`，因此消息也继承了 `Fields` 的所有成员函数。下图展示 `header` 与 `message` 的继承关系，以及每个偏特化中部分显著成员的差异：
	The container offers value semantics including move and copy if supported by __Body__ and __Fields__. User defined template function parameters can accept any message, or can use partial specialization to accept just requests or responses. The default __fields__ is a provided associative container using the standard allocator and supporting modification and inspection of fields. As per __rfc7230__, a non-case-sensitive comparison is used for field names. User defined types for fields are possible. The `Body` type determines the type of the container used to represent the body as well as the algorithms for transferring buffers to and from the container. The library comes with a collection of common body types. As with fields, user defined body types are possible.	该容器提供值语义，支持移动和拷贝操作（前提是 __Body__ 和 __Fields__ 支持这些操作）。用户定义的模板函数参数可以接受任意消息，也可通过偏特化仅接受请求或响应。默认的 __fields__ 是一个关联容器，使用标准分配器，支持字段的修改与查询。根据 __rfc7230__，字段名称比较时不区分大小写。用户也可以自定义字段类型。`Body` 类型决定消息体的容器类型，以及用于在容器与缓冲区之间传输数据的算法。该库提供一组常用的消息体类型。与字段类似，用户也可以自定义消息体类型。
	[link beast.ref.boost__beast__http__span_body `span_body`]	[link beast.ref.boost__beast__http__span_body `span_body`]
	A body whose `value_type` is a [@boost:/libs/core/doc/html/core/span.html `span`], a non-owning reference to a single linear buffer of bytes. Messages with this body type may be serialized and parsed.	该消息体类型的 `value_type` 为 [@boost:/libs/core/doc/html/core/span.html `span`]，这是一个指向单个线性字节缓冲区的非拥有引用。带有该消息体类型的消息可进行序列化和解析。
	[link beast.ref.boost__beast__http__string_body `string_body`] [link beast.ref.boost__beast__http__basic_string_body `basic_string_body`]	[link beast.ref.boost__beast__http__string_body `string_body`] [link beast.ref.boost__beast__http__basic_string_body `basic_string_body`]
	[link beast.ref.boost__beast__http__vector_body `vector_body`]	[link beast.ref.boost__beast__http__vector_body `vector_body`]
	A body whose `value_type` is `std::vector`. Insertion complexity is amortized constant time, while capacity grows geometrically. Messages with this body type may be serialized and parsed.	该消息体类型的 `value_type` 为 `std::vector`。插入操作的均摊复杂度为常数时间，容量以几何级数增长。带有该消息体类型的消息支持序列化和解析操作。
	[http_snippet_2]	[http_snippet_2]
	GET /index.htm HTTP/1.1\r\n Accept: text/html\r\n User-Agent: Beast\r\n \r\n	GET /index.htm HTTP/1.1\r\n Accept: text/html\r\n User-Agent: Beast\r\n \r\n
	In this code we create an HTTP response with a status code indicating success. This message has a body with a non-zero length. The function [link beast.ref.boost__beast__http__message.prepare_payload `message::prepare_payload`] automatically sets the Content-Length or Transfer-Encoding field depending on the content and type of the `body` member. Use of this function is optional; these fields may also be set explicitly.	以下代码创建一个带有成功状态码的 HTTP 响应。该消息包含一个非空的消息体。prepare_payload 函数会根据 body 成员的内容和类型自动设置 Content-Length 或 Transfer-Encoding 字段。该函数可调用也可不调用；这些字段也可手动显式设置。

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