Reorganize source files

include/beast/http/impl/read.ipp

@@ -0,0 +1,285 @@
+//
+// Copyright (c) 2013-2016 Vinnie Falco (vinnie dot falco at gmail dot com)
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#ifndef BEAST_HTTP_IMPL_READ_IPP_HPP
+#define BEAST_HTTP_IMPL_READ_IPP_HPP
+
+#include <beast/http/type_check.hpp>
+#include <beast/async_completion.hpp>
+#include <beast/bind_handler.hpp>
+#include <beast/handler_alloc.hpp>
+#include <cassert>
+
+namespace beast {
+namespace http {
+
+namespace detail {
+
+template<class Stream, class Streambuf,
+    bool isRequest, class Body, class Headers,
+        class Handler>
+class read_op
+{
+    using alloc_type =
+        handler_alloc<char, Handler>;
+
+    using parser_type =
+        parser<isRequest, Body, Headers>;
+
+    using message_type =
+        message<isRequest, Body, Headers>;
+
+    struct data
+    {
+        Stream& s;
+        Streambuf& sb;
+        message_type& m;
+        parser_type p;
+        Handler h;
+        bool cont;
+        int state = 0;
+
+        template<class DeducedHandler>
+        data(DeducedHandler&& h_, Stream& s_,
+                Streambuf& sb_, message_type& m_)
+            : s(s_)
+            , sb(sb_)
+            , m(m_)
+            , h(std::forward<DeducedHandler>(h_))
+            , cont(boost_asio_handler_cont_helpers::
+                is_continuation(h))
+        {
+        }
+    };
+
+    std::shared_ptr<data> d_;
+
+public:
+    read_op(read_op&&) = default;
+    read_op(read_op const&) = default;
+
+    template<class DeducedHandler, class... Args>
+    read_op(DeducedHandler&& h, Stream&s, Args&&... args)
+        : d_(std::allocate_shared<data>(alloc_type{h},
+            std::forward<DeducedHandler>(h), s,
+                std::forward<Args>(args)...))
+    {
+        (*this)(error_code{}, 0, false);
+    }
+
+    void
+    operator()(error_code ec,
+        std::size_t bytes_transferred, bool again = true);
+
+    friend
+    auto asio_handler_allocate(
+        std::size_t size, read_op* op)
+    {
+        return boost_asio_handler_alloc_helpers::
+            allocate(size, op->d_->h);
+    }
+
+    friend
+    auto asio_handler_deallocate(
+        void* p, std::size_t size, read_op* op)
+    {
+        return boost_asio_handler_alloc_helpers::
+            deallocate(p, size, op->d_->h);
+    }
+
+    friend
+    auto asio_handler_is_continuation(read_op* op)
+    {
+        return op->d_->cont;
+    }
+
+    template <class Function>
+    friend
+    auto asio_handler_invoke(Function&& f, read_op* op)
+    {
+        return boost_asio_handler_invoke_helpers::
+            invoke(f, op->d_->h);
+    }
+};
+
+template<class Stream, class Streambuf,
+    bool isRequest, class Body, class Headers,
+        class Handler>
+void
+read_op<Stream, Streambuf, isRequest, Body, Headers, Handler>::
+operator()(error_code ec, std::size_t bytes_transferred, bool again)
+{
+    auto& d = *d_;
+    d.cont = d.cont || again;
+    while(d.state != 99)
+    {
+        switch(d.state)
+        {
+        case 0:
+        {
+            auto const used =
+                d.p.write(d.sb.data(), ec);
+            if(ec)
+            {
+                // call handler
+                d.state = 99;
+                d.s.get_io_service().post(
+                    bind_handler(std::move(*this), ec, 0));
+                return;
+            }
+            d.sb.consume(used);
+            if(d.p.complete())
+            {
+                // call handler
+                d.state = 99;
+                d.m = d.p.release();
+                d.s.get_io_service().post(
+                    bind_handler(std::move(*this), ec, 0));
+                return;
+            }
+            d.state = 1;
+            break;
+        }
+
+        case 1:
+            // read
+            d.state = 2;
+            d.s.async_read_some(d.sb.prepare(
+                read_size_helper(d.sb, 65536)),
+                    std::move(*this));
+            return;
+
+        // got data
+        case 2:
+        {
+            if(ec == boost::asio::error::eof)
+            {
+                if(! d.p.started())
+                {
+                    // call handler
+                    d.state = 99;
+                    break;
+                }
+                // Caller will see eof on next read.
+                ec = {};
+                d.p.write_eof(ec);
+                if(! ec)
+                {
+                    assert(d.p.complete());
+                    d.m = d.p.release();
+                }
+                // call handler
+                d.state = 99;
+                break;
+            }
+            if(ec)
+            {
+                // call handler
+                d.state = 99;
+                break;
+            }
+            d.sb.commit(bytes_transferred);
+            d.sb.consume(d.p.write(d.sb.data(), ec));
+            if(ec)
+            {
+                // call handler
+                d.state = 99;
+                break;
+            }
+            if(d.p.complete())
+            {
+                // call handler
+                d.state = 99;
+                d.m = d.p.release();
+                break;
+            }
+            d.state = 1;
+            break;
+        }
+        }
+    }
+    d.h(ec);
+}
+
+} // detail
+
+//------------------------------------------------------------------------------
+
+template<class SyncReadStream, class Streambuf,
+    bool isRequest, class Body, class Headers>
+void
+read(SyncReadStream& stream, Streambuf& streambuf,
+    message<isRequest, Body, Headers>& m,
+        error_code& ec)
+{
+    static_assert(is_SyncReadStream<SyncReadStream>::value,
+        "SyncReadStream requirements not met");
+    static_assert(is_Streambuf<Streambuf>::value,
+        "Streambuf requirements not met");
+    static_assert(is_ReadableBody<Body>::value,
+        "ReadableBody requirements not met");
+    parser<isRequest, Body, Headers> p;
+    for(;;)
+    {
+        auto used =
+            p.write(streambuf.data(), ec);
+        if(ec)
+            return;
+        streambuf.consume(used);
+        if(p.complete())
+        {
+            m = p.release();
+            break;
+        }
+        streambuf.commit(stream.read_some(
+            streambuf.prepare(read_size_helper(
+                streambuf, 65536)), ec));
+        if(ec && ec != boost::asio::error::eof)
+            return;
+        if(ec == boost::asio::error::eof)
+        {
+            if(! p.started())
+                return;
+            // Caller will see eof on next read.
+            ec = {};
+            p.write_eof(ec);
+            if(ec)
+                return;
+            assert(p.complete());
+            m = p.release();
+            break;
+        }
+    }
+}
+
+template<class AsyncReadStream, class Streambuf,
+    bool isRequest, class Body, class Headers,
+        class CompletionToken>
+auto
+async_read(AsyncReadStream& stream, Streambuf& streambuf,
+    message<isRequest, Body, Headers>& m,
+        CompletionToken&& token)
+{
+    static_assert(is_AsyncReadStream<AsyncReadStream>::value,
+        "AsyncReadStream requirements not met");
+    static_assert(is_Streambuf<Streambuf>::value,
+        "Streambuf requirements not met");
+    static_assert(is_ReadableBody<Body>::value,
+        "ReadableBody requirements not met");
+    beast::async_completion<CompletionToken,
+        void(error_code)> completion(token);
+    detail::read_op<AsyncReadStream, Streambuf,
+        isRequest, Body, Headers, decltype(
+            completion.handler)>{completion.handler,
+                stream, streambuf, m};
+    return completion.result.get();
+}
+
+} // http
+} // beast
+
+#endif