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#49 - Server can respond with data back to client.
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70 changes: 70 additions & 0 deletions
70
lib/smooth/application/network/http/websocket/responses/WSResponse.cpp
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,70 @@ | ||
| #include <smooth/application/network/http/websocket/responses/WSResponse.h> | ||
| #include <smooth/core/network/util.h> | ||
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| namespace smooth::application::network::http::websocket::responses | ||
| { | ||
| ResponseStatus WSResponse::get_data(std::size_t max_amount, std::vector<uint8_t>& target) | ||
| { | ||
| auto res{ResponseStatus::EndOfData}; | ||
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| auto remaining = std::distance(data.begin(), data.end()); | ||
| if (remaining > 0) | ||
| { | ||
| auto to_send = std::min(static_cast<std::size_t>(remaining), max_amount); | ||
| auto begin = data.begin(); | ||
| auto end = data.begin() + static_cast<long>(to_send); | ||
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| std::copy(std::make_move_iterator(begin), std::make_move_iterator(end), | ||
| std::back_inserter(target)); | ||
| data.erase(begin, end); | ||
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| // Anything still left? | ||
| remaining = std::distance(data.begin(), data.end()); | ||
| res = remaining > 0 ? ResponseStatus::HasMoreData : ResponseStatus::LastData; | ||
| } | ||
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| return res; | ||
| } | ||
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| WSResponse::WSResponse(WebsocketProtocol::OpCode code) | ||
| { | ||
| // Set fin-bit | ||
| auto val = 0x80 | static_cast<uint8_t>(code); | ||
| data.emplace_back(val); | ||
| // No payload. | ||
| data.emplace_back(0); | ||
| } | ||
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| WSResponse::WSResponse(const std::string& text) | ||
| { | ||
| auto val = 0x80 | static_cast<uint8_t>(WebsocketProtocol::OpCode::Text); | ||
| data.emplace_back(val); | ||
| if(text.size() <= 125) | ||
| { | ||
| data.emplace_back(text.size()); | ||
| } | ||
| else if(text.size() > std::numeric_limits<uint16_t>::max()) | ||
| { | ||
| std::array<uint8_t, 8> size{}; | ||
| auto p = reinterpret_cast<uint64_t*>(&size[0]); | ||
| *p = static_cast<uint64_t>(text.size()); | ||
| *p = smooth::core::network::hton(*p); | ||
| data.emplace_back(127); | ||
| std::copy(size.begin(), size.end(), std::back_inserter(data)); | ||
| data.emplace_back(text.size()); | ||
| } | ||
| else | ||
| { | ||
| std::array<uint8_t, 2> size{}; | ||
| auto p = reinterpret_cast<uint16_t*>(&size[0]); | ||
| *p = static_cast<uint16_t>(text.size()); | ||
| *p = smooth::core::network::hton(*p); | ||
| data.emplace_back(126); | ||
| std::copy(size.begin(), size.end(), std::back_inserter(data)); | ||
| data.emplace_back(text.size()); | ||
| } | ||
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| std::copy(text.begin(), text.end(), std::back_inserter(data)); | ||
| } | ||
| } |
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