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Returns true
        if the specified HTTP request is a WebSocket Upgrade.
      
        Defined in header <boost/beast/websocket/rfc6455.hpp>
      
template< class Allocator> bool is_upgrade( beast::http::header< true, http::basic_fields< Allocator >> const& req);
        This function returns true when
        the passed HTTP Request indicates a WebSocket Upgrade. It does not validate
        the contents of the fields: it just trivially accepts requests which could
        only possibly be a valid or invalid WebSocket Upgrade message.
      
        Callers who wish to manually read HTTP requests in their server implementation
        can use this function to determine if the request should be routed to an
        instance of websocket::stream.
      
void handle_connection(boost::asio::ip::tcp::socket& sock) { boost::beast::flat_buffer buffer; boost::beast::http::request<boost::beast::http::string_body> req; boost::beast::http::read(sock, buffer, req); if(boost::beast::websocket::is_upgrade(req)) { boost::beast::websocket::stream<decltype(sock)> ws{std::move(sock)}; ws.accept(req); } }
| Name | Description | 
|---|---|
| 
                   | The HTTP Request object to check. | 
        true if the request is a WebSocket
        Upgrade.
      
        Convenience header <boost/beast/websocket.hpp>