| 123456789101112131415161718192021 | #ifndef BELL_SOCKET_H#define BELL_SOCKET_H#include <string>namespace bell {    class Socket {        public:            Socket() {};            virtual ~Socket() = default;			void open(const std::string &url);			virtual void open(std::string host, uint16_t port) = 0;			virtual size_t poll() = 0;            virtual size_t write(uint8_t* buf, size_t len) = 0;            virtual size_t read(uint8_t* buf, size_t len) = 0;            virtual void close() = 0;    };}#endif
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