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* There is no way to defer the commitment of the type for `body_` to
* There is no way to defer the commitment of the type for无法推迟 `body_` to类型的提交。
06/20/2026
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* No stateful allocator support.
* No stateful allocator support.不支持有状态分配器。
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* The header and body containers may only be default-constructed.
* The header and body containers may only be default-constructed.头部和主体容器只能通过默认构造函数进行构造。
06/20/2026
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This container is the base class template used to represent HTTP messages. It uses a "tag" type style specializations for a variety of trait classes, allowing for customization of the various parts of the message. For example, a user specializes `headers_container<T>` to determine what container type holds the header fields. We note some problems with the container declaration:
This container is the base class template used to represent HTTP messages. It uses a "tag" type style specializations for a variety of trait classes, allowing for customization of the various parts of the message. For example, a user specializes `headers_container<T>` to determine what container type holds the header fields. We note some problems with the container declaration:这个容器是用于表示 HTTP 消息的基类模板。它使用“标签（tag）”类型风格来特化各种特征类，从而允许对消息的各个部分进行自定义。例如，用户可以通过特化 `headers_container<T>` 来确定使用何种容器类型来存储头部字段。我们注意到该容器的声明存在一些问题：
06/20/2026
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}; ```
}; ```
82
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is a network programming library previously intended for Boost but not having gone through formal review. As of this writing it still uses the Boost name, namespace, and directory structure although the project states that Boost acceptance is no longer a goal. The library is based on Boost.Asio and bills itself as ['"a collection of network related routines/implementations geared towards providing a robust cross-platform networking library"]. It cites ['"Common Message Type"] as a feature. As of the branch previous linked, it uses these declarations: ``` template <class Tag> struct basic_message {
is a network programming library previously intended for Boost but not having gone through formal review. As of this writing it still uses the Boost name, namespace, and directory structure although the project states that Boost acceptance is no longer a goal. The library is based on Boost.Asio and bills itself as ['"a collection of network related routines/implementations geared towards providing a robust cross-platform networking library"]. It cites ['"Common Message Type"] as a feature. As of the branch previous linked, it uses these declarations: cpp-netlib 是一个网络编程库，原本计划纳入 Boost，但并未通过正式审查。在撰写本文时，它仍然使用 Boost 的名称、命名空间和目录结构，尽管该项目声明不再将纳入 Boost 作为目标。该库基于 Boost.Asio，自称是“一组与网络相关的例程/实现，旨在提供一个健壮的跨平台网络库”。它将“通用消息类型”列为其特性之一。在上述链接的分支中，它使用了以下声明：
``` template <class Tag> struct basic_message {
06/20/2026
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cpp-netlib
cpp-netlib
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Declarations examples from external libraries have been edited:
Declarations examples from external libraries have been edited:来自外部库的声明示例已做编辑：
06/20/2026
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* How does the library handle corner cases such as trailers,
* How does the library handle corner cases such as 该库如何处理尾部（trailers,）等边界情况，
06/20/2026
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* Check treatment of buffers. Does the library manage the buffers
* Check treatment of buffers. Does the library manage the buffers检查缓冲区处理方式。该库是否负责管理缓冲区
06/20/2026
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* Review the stream abstraction. This is the type of object, such as
* Review the stream abstraction. This is the type of object, such as审查流抽象层。这是一种对象类型，例如
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* Review the message model. Can it represent a complete request or
* Review the message model. Can it represent a complete request or审查消息模型。它能否表示一个完整的请求或
06/20/2026
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The general strategy used by the author to evaluate external libraries is as follows:
The general strategy used by the author to evaluate external libraries is as follows:作者评估外部库的总体策略如下：
06/20/2026
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There are a few C++ published libraries which implement some of the HTTP protocol. We analyze the message model chosen by those libraries and discuss the advantages and disadvantages relative to Beast.
There are a few C++ published libraries which implement some of the HTTP protocol. We analyze the message model chosen by those libraries and discuss the advantages and disadvantages relative to Beast.目前已有一些 C++ 库实现了部分 HTTP 协议。我们将分析这些库所采用的消息模型，并讨论它们相对于 Beast 的优缺点。
06/20/2026
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HTTP Comparison to Other Libraries
HTTP Comparison to Other Libraries与其他库的比较
06/20/2026
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Contributor joined
Contributor joined 06/20/2026
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Translation completed
Translation completed 06/20/2026
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In conclusion, this representation for the message container is well thought out, provides comprehensive flexibility, and avoids the necessity of defining additional traits classes. User declarations of functions that accept headers or messages as parameters are easy to write in a variety of ways to accomplish different results, without forcing cumbersome SFINAE declarations everywhere.
In conclusion, this representation for the message container is well thought out, provides comprehensive flexibility, and avoids the necessity of defining additional traits classes. User declarations of functions that accept headers or messages as parameters are easy to write in a variety of ways to accomplish different results, without forcing cumbersome SFINAE declarations everywhere.综上所述，这种消息容器的表示方式经过深思熟虑，提供了全面的灵活性，并且免去了定义额外特征类（traits classes）的必要。用户声明接受头部或消息作为参数的函数时，可以通过多种方式轻松编写，以实现不同的目的，而无需在代码中到处使用繁琐的 SFINAE 声明。
06/20/2026
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This container is also capable of representing complete HTTP/2 messages. Not because it was explicitly designed for, but because the IETF wanted to preserve message compatibility with HTTP/1. Aside from version specific fields such as Connection, the contents of HTTP/1 and HTTP/2 messages are identical even though their serialized representation is considerably different. The message model presented in this library is ready for HTTP/2.
This container is also capable of representing complete HTTP/2 messages. Not because it was explicitly designed for, but because the IETF wanted to preserve message compatibility with HTTP/1. Aside from version specific fields such as Connection, the contents of 该容器同样能够表示完整的 HTTP/2 消息。这并非因为它是为此而专门设计的，而是因为 IETF 希望保持与 HTTP/1 的消息兼容性。除了像 `Connection` 这类特定于版本的字段之外，HTTP/1 and和 HTTP/2 messages are identical even though their serialized representation is considerably different. The message model presented in this library is ready for HTTP/2.消息的内容是完全相同的，尽管它们的序列化表示形式存在显著差异。因此，本库中展示的消息模型已经为 HTTP/2 做好了准备。
06/20/2026
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response<file_body> res; ```
response<file_body> res; ```
06/20/2026

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