Exit Zen
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* The message model includes a "source" and "destination." This is
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* The use of `string_type` (a customization point) for source,
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* The library uses specializations of `string<Tag>` to change the type
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* The specialized trait classes generate a proliferation of small
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* The `string<Tag> customization point constrains user defined body types
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The design of the message container in this library is cumbersome with its system of customization using trait specializations. The use of these customizations is extremely limited due to the way they are used in the container declaration, making the design overly complex without corresponding benefit.
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Boost.HTTP
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is a library resulting from the 2014 Google Summer of Code. It was submitted for a Boost formal review and rejected in 2015. It is based on Boost.Asio, and development on the library has continued to the present. As of the branch previously linked, it uses these message declarations: ``` template<class Headers, class Body> struct basic_message {
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private:
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};
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typedef basic_message<boost::http::headers, std::vector<std::uint8_t>> message;
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template<class Headers, class Body> struct is_message<basic_message<Headers, Body>>: public std::true_type {}; ```
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* This container cannot model a complete message. The ['start-line] items
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* `headers_`, `body_`, and `trailers_` may only be default-constructed,
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* There is no way to defer the commitment of the [*Body] type to after
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31
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* No stateful allocator support. This follows from the previous limitation
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32
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* The trailers are stored in a separate object. Aside from the combinatorial
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33
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* The declarations imply that `std::vector` is a model of [*Body].
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34
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* The [*Body] customization point constrains user defined types to
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35
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This representation addresses a narrow range of use cases. It has limited potential for customization and performance. It is more difficult to use because it excludes the start line fields from the model.
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