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</pre><pre class='rust '>
<span class='doccomment'>//! The module contains a number of reusable components for implementing the server side of an</span>
<span class='doccomment'>//! HTTP/2 connection.</span>

<span class='kw'>use</span> <span class='ident'>http</span>::{
    <span class='ident'>StreamId</span>,
    <span class='ident'>Header</span>,
    <span class='ident'>HttpResult</span>,
    <span class='ident'>HttpScheme</span>,
};
<span class='kw'>use</span> <span class='ident'>http</span>::<span class='ident'>frame</span>::<span class='ident'>SettingsFrame</span>;
<span class='kw'>use</span> <span class='ident'>http</span>::<span class='ident'>connection</span>::{
    <span class='ident'>SendFrame</span>, <span class='ident'>ReceiveFrame</span>,
    <span class='ident'>HttpConnection</span>, <span class='ident'>EndStream</span>,
    <span class='ident'>SendStatus</span>,
};
<span class='kw'>use</span> <span class='ident'>http</span>::<span class='ident'>session</span>::{
    <span class='ident'>Session</span>,
    <span class='ident'>SessionState</span>,
    <span class='ident'>Stream</span>,
    <span class='ident'>DefaultStream</span>,
    <span class='ident'>DefaultSessionState</span>,
};
<span class='kw'>use</span> <span class='ident'>http</span>::<span class='ident'>priority</span>::<span class='ident'>SimplePrioritizer</span>;

<span class='doccomment'>/// An implementation of the `Session` trait for a server-side HTTP/2 connection.</span>
<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>ServerSession</span><span class='op'>&lt;</span><span class='lifetime'>&#39;a</span>, <span class='ident'>State</span><span class='op'>&gt;</span> <span class='kw'>where</span> <span class='ident'>State</span>: <span class='ident'>SessionState</span> <span class='op'>+</span> <span class='lifetime'>&#39;a</span> {
    <span class='ident'>state</span>: <span class='kw-2'>&amp;</span><span class='lifetime'>&#39;a</span> <span class='kw-2'>mut</span> <span class='ident'>State</span>,
}

<span class='kw'>impl</span><span class='op'>&lt;</span><span class='lifetime'>&#39;a</span>, <span class='ident'>State</span><span class='op'>&gt;</span> <span class='ident'>ServerSession</span><span class='op'>&lt;</span><span class='lifetime'>&#39;a</span>, <span class='ident'>State</span><span class='op'>&gt;</span> <span class='kw'>where</span> <span class='ident'>State</span>: <span class='ident'>SessionState</span> <span class='op'>+</span> <span class='lifetime'>&#39;a</span> {
    <span class='attribute'>#[<span class='ident'>inline</span>]</span>
    <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>new</span>(<span class='ident'>state</span>: <span class='kw-2'>&amp;</span><span class='lifetime'>&#39;a</span> <span class='kw-2'>mut</span> <span class='ident'>State</span>) <span class='op'>-&gt;</span> <span class='ident'>ServerSession</span><span class='op'>&lt;</span><span class='ident'>State</span><span class='op'>&gt;</span> {
        <span class='ident'>ServerSession</span> {
            <span class='ident'>state</span>: <span class='ident'>state</span>,
        }
    }
}

<span class='kw'>impl</span><span class='op'>&lt;</span><span class='lifetime'>&#39;a</span>, <span class='ident'>State</span><span class='op'>&gt;</span> <span class='ident'>Session</span> <span class='kw'>for</span> <span class='ident'>ServerSession</span><span class='op'>&lt;</span><span class='lifetime'>&#39;a</span>, <span class='ident'>State</span><span class='op'>&gt;</span> <span class='kw'>where</span> <span class='ident'>State</span>: <span class='ident'>SessionState</span> <span class='op'>+</span> <span class='lifetime'>&#39;a</span> {
    <span class='kw'>fn</span> <span class='ident'>new_data_chunk</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>stream_id</span>: <span class='ident'>StreamId</span>, <span class='ident'>data</span>: <span class='kw-2'>&amp;</span>[<span class='ident'>u8</span>]) {
        <span class='macro'>debug</span><span class='macro'>!</span>(<span class='string'>&quot;Data chunk for stream {}&quot;</span>, <span class='ident'>stream_id</span>);
        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>stream</span> <span class='op'>=</span> <span class='kw'>match</span> <span class='self'>self</span>.<span class='ident'>state</span>.<span class='ident'>get_stream_mut</span>(<span class='ident'>stream_id</span>) {
            <span class='prelude-val'>None</span> <span class='op'>=&gt;</span> {
                <span class='macro'>debug</span><span class='macro'>!</span>(<span class='string'>&quot;Received a frame for an unknown stream!&quot;</span>);
                <span class='kw'>return</span>;
            },
            <span class='prelude-val'>Some</span>(<span class='ident'>stream</span>) <span class='op'>=&gt;</span> <span class='ident'>stream</span>,
        };
        <span class='comment'>// Now let the stream handle the data chunk</span>
        <span class='ident'>stream</span>.<span class='ident'>new_data_chunk</span>(<span class='ident'>data</span>);
    }
    <span class='kw'>fn</span> <span class='ident'>new_headers</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>stream_id</span>: <span class='ident'>StreamId</span>, <span class='ident'>headers</span>: <span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>Header</span><span class='op'>&gt;</span>) {
        <span class='macro'>debug</span><span class='macro'>!</span>(<span class='string'>&quot;Headers for stream {}&quot;</span>, <span class='ident'>stream_id</span>);
        <span class='kw'>match</span> <span class='self'>self</span>.<span class='ident'>state</span>.<span class='ident'>get_stream_mut</span>(<span class='ident'>stream_id</span>) {
            <span class='prelude-val'>Some</span>(<span class='ident'>stream</span>) <span class='op'>=&gt;</span> {
                <span class='comment'>// This&#39;d correspond to having received trailers...</span>
                <span class='ident'>stream</span>.<span class='ident'>set_headers</span>(<span class='ident'>headers</span>);
                <span class='kw'>return</span>;
            },
            <span class='prelude-val'>None</span> <span class='op'>=&gt;</span> {},
        };
        <span class='comment'>// New stream initiated by the client</span>
        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>stream</span>: <span class='ident'>State</span>::<span class='ident'>Stream</span> <span class='op'>=</span> <span class='ident'>Stream</span>::<span class='ident'>new</span>(<span class='ident'>stream_id</span>);
        <span class='ident'>stream</span>.<span class='ident'>set_headers</span>(<span class='ident'>headers</span>);
        <span class='self'>self</span>.<span class='ident'>state</span>.<span class='ident'>insert_stream</span>(<span class='ident'>stream</span>);
    }

    <span class='kw'>fn</span> <span class='ident'>end_of_stream</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>stream_id</span>: <span class='ident'>StreamId</span>) {
        <span class='macro'>debug</span><span class='macro'>!</span>(<span class='string'>&quot;End of stream {}&quot;</span>, <span class='ident'>stream_id</span>);
        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>stream</span> <span class='op'>=</span> <span class='kw'>match</span> <span class='self'>self</span>.<span class='ident'>state</span>.<span class='ident'>get_stream_mut</span>(<span class='ident'>stream_id</span>) {
            <span class='prelude-val'>None</span> <span class='op'>=&gt;</span> {
                <span class='macro'>debug</span><span class='macro'>!</span>(<span class='string'>&quot;Received a frame for an unknown stream!&quot;</span>);
                <span class='kw'>return</span>;
            },
            <span class='prelude-val'>Some</span>(<span class='ident'>stream</span>) <span class='op'>=&gt;</span> <span class='ident'>stream</span>,
        };
        <span class='ident'>stream</span>.<span class='ident'>close_remote</span>()
    }
}

<span class='doccomment'>/// The struct provides a more convenient API for server-related functionality of an HTTP/2</span>
<span class='doccomment'>/// connection, such as sending a response back to the client.</span>
<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>ServerConnection</span><span class='op'>&lt;</span><span class='ident'>S</span>, <span class='ident'>R</span>, <span class='ident'>State</span><span class='op'>=</span><span class='ident'>DefaultSessionState</span><span class='op'>&lt;</span><span class='ident'>DefaultStream</span><span class='op'>&gt;&gt;</span>
        <span class='kw'>where</span> <span class='ident'>S</span>: <span class='ident'>SendFrame</span>, <span class='ident'>R</span>: <span class='ident'>ReceiveFrame</span>, <span class='ident'>State</span>: <span class='ident'>SessionState</span> {
    <span class='doccomment'>/// The underlying `HttpConnection` that will be used for any HTTP/2</span>
    <span class='doccomment'>/// communication.</span>
    <span class='ident'>conn</span>: <span class='ident'>HttpConnection</span><span class='op'>&lt;</span><span class='ident'>S</span>, <span class='ident'>R</span><span class='op'>&gt;</span>,
    <span class='doccomment'>/// The state of the session associated to this client connection. Maintains the status of the</span>
    <span class='doccomment'>/// connection streams.</span>
    <span class='kw'>pub</span> <span class='ident'>state</span>: <span class='ident'>State</span>,
}

<span class='kw'>impl</span><span class='op'>&lt;</span><span class='ident'>S</span>, <span class='ident'>R</span>, <span class='ident'>State</span><span class='op'>&gt;</span> <span class='ident'>ServerConnection</span><span class='op'>&lt;</span><span class='ident'>S</span>, <span class='ident'>R</span>, <span class='ident'>State</span><span class='op'>&gt;</span>
        <span class='kw'>where</span> <span class='ident'>S</span>: <span class='ident'>SendFrame</span>, <span class='ident'>R</span>: <span class='ident'>ReceiveFrame</span>, <span class='ident'>State</span>: <span class='ident'>SessionState</span> {
    <span class='doccomment'>/// Creates a new `ServerConnection` that will use the given `HttpConnection` for its</span>
    <span class='doccomment'>/// underlying HTTP/2 communication.</span>
    <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>with_connection</span>(<span class='ident'>conn</span>: <span class='ident'>HttpConnection</span><span class='op'>&lt;</span><span class='ident'>S</span>, <span class='ident'>R</span><span class='op'>&gt;</span>, <span class='ident'>state</span>: <span class='ident'>State</span>)
            <span class='op'>-&gt;</span> <span class='ident'>ServerConnection</span><span class='op'>&lt;</span><span class='ident'>S</span>, <span class='ident'>R</span>, <span class='ident'>State</span><span class='op'>&gt;</span> {
        <span class='ident'>ServerConnection</span> {
            <span class='ident'>conn</span>: <span class='ident'>conn</span>,
            <span class='ident'>state</span>: <span class='ident'>state</span>,
        }
    }

    <span class='doccomment'>/// Returns the scheme of the underlying `HttpConnection`.</span>
    <span class='attribute'>#[<span class='ident'>inline</span>]</span>
    <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>scheme</span>(<span class='kw-2'>&amp;</span><span class='self'>self</span>) <span class='op'>-&gt;</span> <span class='ident'>HttpScheme</span> {
        <span class='self'>self</span>.<span class='ident'>conn</span>.<span class='ident'>scheme</span>
    }

    <span class='doccomment'>/// Initializes the `ServerConnection` by sending the server&#39;s settings and processing the</span>
    <span class='doccomment'>/// client&#39;s.</span>
    <span class='doccomment'>/// If the client does not provide a settings frame, returns an error.</span>
    <span class='doccomment'>///</span>
    <span class='doccomment'>/// TODO This method should eventually be split into two.</span>
    <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>init</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-&gt;</span> <span class='ident'>HttpResult</span><span class='op'>&lt;</span>()<span class='op'>&gt;</span> {
        <span class='comment'>// TODO: `HttpConnection` should provide a better API for sending settings.</span>
        <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>conn</span>.<span class='ident'>sender</span>.<span class='ident'>send_frame</span>(<span class='ident'>SettingsFrame</span>::<span class='ident'>new</span>()));
        <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>read_preface</span>());
        <span class='prelude-val'>Ok</span>(())
    }

    <span class='doccomment'>/// Reads and handles the settings frame of the client preface. If the settings frame is not</span>
    <span class='doccomment'>/// the next frame received on the underlying connection, returns an error.</span>
    <span class='kw'>fn</span> <span class='ident'>read_preface</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-&gt;</span> <span class='ident'>HttpResult</span><span class='op'>&lt;</span>()<span class='op'>&gt;</span> {
        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>session</span> <span class='op'>=</span> <span class='ident'>ServerSession</span>::<span class='ident'>new</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='self'>self</span>.<span class='ident'>state</span>);
        <span class='self'>self</span>.<span class='ident'>conn</span>.<span class='ident'>expect_settings</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='ident'>session</span>)
    }

    <span class='doccomment'>/// Fully handles the next incoming frame. Events are passed on to the internal `session`</span>
    <span class='doccomment'>/// instance.</span>
    <span class='attribute'>#[<span class='ident'>inline</span>]</span>
    <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>handle_next_frame</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-&gt;</span> <span class='ident'>HttpResult</span><span class='op'>&lt;</span>()<span class='op'>&gt;</span> {
        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>session</span> <span class='op'>=</span> <span class='ident'>ServerSession</span>::<span class='ident'>new</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='self'>self</span>.<span class='ident'>state</span>);
        <span class='self'>self</span>.<span class='ident'>conn</span>.<span class='ident'>handle_next_frame</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='ident'>session</span>)
    }

    <span class='doccomment'>/// Starts a response on the stream with the given ID by sending the given headers.</span>
    <span class='doccomment'>///</span>
    <span class='doccomment'>/// The body of the response is assumed to be provided by the `Stream` instance stored within</span>
    <span class='doccomment'>/// the connection&#39;s state. (The body does not have to be ready when this method is called, as</span>
    <span class='doccomment'>/// long as the `Stream` instance knows how to provide it to the connection later on.)</span>
    <span class='attribute'>#[<span class='ident'>inline</span>]</span>
    <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>start_response</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='self'>self</span>,
                          <span class='ident'>headers</span>: <span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>Header</span><span class='op'>&gt;</span>,
                          <span class='ident'>stream_id</span>: <span class='ident'>StreamId</span>,
                          <span class='ident'>end_stream</span>: <span class='ident'>EndStream</span>) <span class='op'>-&gt;</span> <span class='ident'>HttpResult</span><span class='op'>&lt;</span>()<span class='op'>&gt;</span> {
        <span class='self'>self</span>.<span class='ident'>conn</span>.<span class='ident'>send_headers</span>(<span class='ident'>headers</span>, <span class='ident'>stream_id</span>, <span class='ident'>end_stream</span>)
    }

    <span class='doccomment'>/// Queues a new DATA frame onto the underlying `SendFrame`.</span>
    <span class='doccomment'>///</span>
    <span class='doccomment'>/// Currently, no prioritization of streams is taken into account and which stream&#39;s data is</span>
    <span class='doccomment'>/// queued cannot be relied on.</span>
    <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>send_next_data</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-&gt;</span> <span class='ident'>HttpResult</span><span class='op'>&lt;</span><span class='ident'>SendStatus</span><span class='op'>&gt;</span> {
        <span class='macro'>debug</span><span class='macro'>!</span>(<span class='string'>&quot;Sending next data...&quot;</span>);
        <span class='comment'>// A default &quot;maximum&quot; chunk size of 8 KiB is set on all data frames.</span>
        <span class='kw'>const</span> <span class='ident'>MAX_CHUNK_SIZE</span>: <span class='ident'>usize</span> <span class='op'>=</span> <span class='number'>8</span> <span class='op'>*</span> <span class='number'>1024</span>;
        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>buf</span> <span class='op'>=</span> [<span class='number'>0</span>; <span class='ident'>MAX_CHUNK_SIZE</span>];

        <span class='comment'>// TODO: Additionally account for the flow control windows.</span>
        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>prioritizer</span> <span class='op'>=</span> <span class='ident'>SimplePrioritizer</span>::<span class='ident'>new</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='self'>self</span>.<span class='ident'>state</span>, <span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='ident'>buf</span>);

        <span class='self'>self</span>.<span class='ident'>conn</span>.<span class='ident'>send_next_data</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='ident'>prioritizer</span>)
    }
}

<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>test</span>)]</span>
<span class='kw'>mod</span> <span class='ident'>tests</span> {
    <span class='kw'>use</span> <span class='kw'>super</span>::<span class='ident'>ServerSession</span>;

    <span class='kw'>use</span> <span class='ident'>http</span>::<span class='ident'>tests</span>::<span class='ident'>common</span>::<span class='ident'>TestStream</span>;

    <span class='kw'>use</span> <span class='ident'>http</span>::<span class='ident'>session</span>::{<span class='ident'>DefaultSessionState</span>, <span class='ident'>SessionState</span>, <span class='ident'>Stream</span>, <span class='ident'>Session</span>};

    <span class='doccomment'>/// Tests that the `ServerSession` correctly manages the stream state.</span>
    <span class='attribute'>#[<span class='ident'>test</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>test_server_session</span>() {
        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>state</span> <span class='op'>=</span> <span class='ident'>DefaultSessionState</span>::<span class='op'>&lt;</span><span class='ident'>TestStream</span><span class='op'>&gt;</span>::<span class='ident'>new</span>();

        <span class='comment'>// Receiving new headers results in a new stream being created</span>
        <span class='kw'>let</span> <span class='ident'>headers</span> <span class='op'>=</span> <span class='macro'>vec</span><span class='macro'>!</span>[(<span class='string'>b&quot;:method&quot;</span>.<span class='ident'>to_vec</span>(), <span class='string'>b&quot;GET&quot;</span>.<span class='ident'>to_vec</span>())];
        {
            <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>session</span> <span class='op'>=</span> <span class='ident'>ServerSession</span>::<span class='ident'>new</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='ident'>state</span>);
            <span class='ident'>session</span>.<span class='ident'>new_headers</span>(<span class='number'>1</span>, <span class='ident'>headers</span>.<span class='ident'>clone</span>());
        }
        <span class='macro'>assert</span><span class='macro'>!</span>(<span class='ident'>state</span>.<span class='ident'>get_stream_ref</span>(<span class='number'>1</span>).<span class='ident'>is_some</span>());
        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>state</span>.<span class='ident'>get_stream_ref</span>(<span class='number'>1</span>).<span class='ident'>unwrap</span>().<span class='ident'>headers</span>.<span class='ident'>clone</span>().<span class='ident'>unwrap</span>(),
                   <span class='ident'>headers</span>);
        <span class='comment'>// Now some data arrives on the stream...</span>
        {
            <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>session</span> <span class='op'>=</span> <span class='ident'>ServerSession</span>::<span class='ident'>new</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='ident'>state</span>);
            <span class='ident'>session</span>.<span class='ident'>new_data_chunk</span>(<span class='number'>1</span>, <span class='kw-2'>&amp;</span>[<span class='number'>1</span>, <span class='number'>2</span>, <span class='number'>3</span>]);
        }
        <span class='comment'>// ...works.</span>
        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>state</span>.<span class='ident'>get_stream_ref</span>(<span class='number'>1</span>).<span class='ident'>unwrap</span>().<span class='ident'>body</span>, <span class='macro'>vec</span><span class='macro'>!</span>[<span class='number'>1</span>, <span class='number'>2</span>, <span class='number'>3</span>]);
        <span class='comment'>// Some more data...</span>
        {
            <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>session</span> <span class='op'>=</span> <span class='ident'>ServerSession</span>::<span class='ident'>new</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='ident'>state</span>);
            <span class='ident'>session</span>.<span class='ident'>new_data_chunk</span>(<span class='number'>1</span>, <span class='kw-2'>&amp;</span>[<span class='number'>4</span>]);
        }
        <span class='comment'>// ...all good.</span>
        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>state</span>.<span class='ident'>get_stream_ref</span>(<span class='number'>1</span>).<span class='ident'>unwrap</span>().<span class='ident'>body</span>, <span class='macro'>vec</span><span class='macro'>!</span>[<span class='number'>1</span>, <span class='number'>2</span>, <span class='number'>3</span>, <span class='number'>4</span>]);
        <span class='comment'>// Add another stream in the mix</span>
        {
            <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>session</span> <span class='op'>=</span> <span class='ident'>ServerSession</span>::<span class='ident'>new</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='ident'>state</span>);
            <span class='ident'>session</span>.<span class='ident'>new_headers</span>(<span class='number'>3</span>, <span class='ident'>headers</span>.<span class='ident'>clone</span>());
            <span class='ident'>session</span>.<span class='ident'>new_data_chunk</span>(<span class='number'>3</span>, <span class='kw-2'>&amp;</span>[<span class='number'>100</span>]);
        }
        <span class='macro'>assert</span><span class='macro'>!</span>(<span class='ident'>state</span>.<span class='ident'>get_stream_ref</span>(<span class='number'>3</span>).<span class='ident'>is_some</span>());
        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>state</span>.<span class='ident'>get_stream_ref</span>(<span class='number'>3</span>).<span class='ident'>unwrap</span>().<span class='ident'>headers</span>.<span class='ident'>clone</span>().<span class='ident'>unwrap</span>(),
                   <span class='ident'>headers</span>);
        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>state</span>.<span class='ident'>get_stream_ref</span>(<span class='number'>3</span>).<span class='ident'>unwrap</span>().<span class='ident'>body</span>, <span class='macro'>vec</span><span class='macro'>!</span>[<span class='number'>100</span>]);
        {
            <span class='comment'>// Finally, the stream 1 ends...</span>
            <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>session</span> <span class='op'>=</span> <span class='ident'>ServerSession</span>::<span class='ident'>new</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='ident'>state</span>);
            <span class='ident'>session</span>.<span class='ident'>end_of_stream</span>(<span class='number'>1</span>);
        }
        <span class='comment'>// ...and gets closed.</span>
        <span class='macro'>assert</span><span class='macro'>!</span>(<span class='ident'>state</span>.<span class='ident'>get_stream_ref</span>(<span class='number'>1</span>).<span class='ident'>unwrap</span>().<span class='ident'>is_closed_remote</span>());
        <span class='comment'>// but not the other one.</span>
        <span class='macro'>assert</span><span class='macro'>!</span>(<span class='op'>!</span><span class='ident'>state</span>.<span class='ident'>get_stream_ref</span>(<span class='number'>3</span>).<span class='ident'>unwrap</span>().<span class='ident'>is_closed_remote</span>());
    }
}
</pre>
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