88 lines
2.1 KiB
C++
88 lines
2.1 KiB
C++
#pragma once
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#include "io/network/stream_listener.hpp"
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#include "memory/literals.hpp"
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namespace io
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{
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using namespace memory::literals;
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template <class Derived, class Stream>
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class StreamReader : public StreamListener<Derived, Stream>
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{
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public:
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struct Buffer
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{
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char* ptr;
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size_t len;
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};
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StreamReader(uint32_t flags = 0) : StreamListener<Derived, Stream>(flags) {}
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bool accept(Socket& socket)
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{
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// accept a connection from a socket
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auto s = socket.accept(nullptr, nullptr);
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if(!s.is_open())
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return false;
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// make the recieved socket non blocking
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s.set_non_blocking();
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auto& stream = this->derived().on_connect(std::move(s));
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// we want to listen to an incoming event which is edge triggered and
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// we also want to listen on the hangup event
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stream.event.events = EPOLLIN | EPOLLET | EPOLLRDHUP;
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// add the connection to the event listener
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this->add(stream);
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return true;
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}
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void on_data(Stream& stream)
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{
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while(true)
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{
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if(UNLIKELY(!stream.alive()))
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{
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stream.close();
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break;
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}
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// allocate the buffer to fill the data
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auto buf = this->derived().on_alloc(stream);
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// read from the buffer at most buf.len bytes
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buf.len = stream.socket.read(buf.ptr, buf.len);
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// check for read errors
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if(buf.len == -1)
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{
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// this means we have read all available data
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if(LIKELY(errno == EAGAIN))
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{
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break;
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}
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// some other error occurred, check errno
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this->derived().on_error(stream);
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break;
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}
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// end of file, the client has closed the connection
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if(UNLIKELY(buf.len == 0))
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{
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stream.close();
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break;
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}
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this->derived().on_read(stream, buf);
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}
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}
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};
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}
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