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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source to the Rust file `src/server/h2writer.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>h2writer.rs.html -- source</title><link rel="stylesheet" type="text/css" href="../../../normalize.css"><link rel="stylesheet" type="text/css" href="../../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../../dark.css"><link rel="stylesheet" type="text/css" href="../../../light.css" id="themeStyle"><script src="../../../storage.js"></script></head><body class="rustdoc source"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../../../theme.js"></script><nav class="sub"><form class="search-form js-only"><div class="search-container"><input class="search-input" name="search" autocomplete="off" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><a id="settings-menu" href="../../../settings.html"><img src="../../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><pre class="line-numbers"><span id="1"> 1</span>
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</pre><pre class="rust ">
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<span class="attribute">#![<span class="ident">cfg_attr</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"cargo-clippy"</span>, <span class="ident">allow</span>(<span class="ident">redundant_field_names</span>))]</span>
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||
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||
<span class="kw">use</span> <span class="ident">bytes</span>::{<span class="ident">Bytes</span>, <span class="ident">BytesMut</span>};
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||
<span class="kw">use</span> <span class="ident">futures</span>::{<span class="ident">Async</span>, <span class="ident">Poll</span>};
|
||
<span class="kw">use</span> <span class="ident">http2</span>::<span class="ident">server</span>::<span class="ident">SendResponse</span>;
|
||
<span class="kw">use</span> <span class="ident">http2</span>::{<span class="ident">Reason</span>, <span class="ident">SendStream</span>};
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||
<span class="kw">use</span> <span class="ident">modhttp</span>::<span class="ident">Response</span>;
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||
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">rc</span>::<span class="ident">Rc</span>;
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||
<span class="kw">use</span> <span class="ident">std</span>::{<span class="ident">cmp</span>, <span class="ident">io</span>};
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||
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||
<span class="kw">use</span> <span class="ident">http</span>::<span class="ident">header</span>::{<span class="ident">HeaderValue</span>, <span class="ident">CONNECTION</span>, <span class="ident">CONTENT_LENGTH</span>, <span class="ident">DATE</span>, <span class="ident">TRANSFER_ENCODING</span>};
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||
<span class="kw">use</span> <span class="ident">http</span>::{<span class="ident">HttpTryFrom</span>, <span class="ident">Method</span>, <span class="ident">Version</span>};
|
||
|
||
<span class="kw">use</span> <span class="kw">super</span>::<span class="ident">helpers</span>;
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||
<span class="kw">use</span> <span class="kw">super</span>::<span class="ident">message</span>::<span class="ident">Request</span>;
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||
<span class="kw">use</span> <span class="kw">super</span>::<span class="ident">output</span>::{<span class="ident">Output</span>, <span class="ident">ResponseInfo</span>};
|
||
<span class="kw">use</span> <span class="kw">super</span>::<span class="ident">settings</span>::<span class="ident">WorkerSettings</span>;
|
||
<span class="kw">use</span> <span class="kw">super</span>::{<span class="ident">Writer</span>, <span class="ident">WriterState</span>, <span class="ident">MAX_WRITE_BUFFER_SIZE</span>};
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||
<span class="kw">use</span> <span class="ident">body</span>::{<span class="ident">Binary</span>, <span class="ident">Body</span>};
|
||
<span class="kw">use</span> <span class="ident">header</span>::<span class="ident">ContentEncoding</span>;
|
||
<span class="kw">use</span> <span class="ident">httpresponse</span>::<span class="ident">HttpResponse</span>;
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||
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||
<span class="kw">const</span> <span class="ident">CHUNK_SIZE</span>: <span class="ident">usize</span> <span class="op">=</span> <span class="number">16_384</span>;
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||
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||
<span class="macro">bitflags</span><span class="macro">!</span> {
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||
<span class="kw">struct</span> <span class="ident">Flags</span>: <span class="ident">u8</span> {
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||
<span class="kw">const</span> <span class="ident">STARTED</span> <span class="op">=</span> <span class="number">0b0000_0001</span>;
|
||
<span class="kw">const</span> <span class="ident">DISCONNECTED</span> <span class="op">=</span> <span class="number">0b0000_0010</span>;
|
||
<span class="kw">const</span> <span class="ident">EOF</span> <span class="op">=</span> <span class="number">0b0000_0100</span>;
|
||
<span class="kw">const</span> <span class="ident">RESERVED</span> <span class="op">=</span> <span class="number">0b0000_1000</span>;
|
||
}
|
||
}
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||
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||
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct</span> <span class="ident">H2Writer</span><span class="op"><</span><span class="ident">H</span>: <span class="lifetime">'static</span><span class="op">></span> {
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||
<span class="ident">respond</span>: <span class="ident">SendResponse</span><span class="op"><</span><span class="ident">Bytes</span><span class="op">></span>,
|
||
<span class="ident">stream</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">SendStream</span><span class="op"><</span><span class="ident">Bytes</span><span class="op">>></span>,
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||
<span class="ident">flags</span>: <span class="ident">Flags</span>,
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||
<span class="ident">written</span>: <span class="ident">u64</span>,
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||
<span class="ident">buffer</span>: <span class="ident">Output</span>,
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||
<span class="ident">buffer_capacity</span>: <span class="ident">usize</span>,
|
||
<span class="ident">settings</span>: <span class="ident">Rc</span><span class="op"><</span><span class="ident">WorkerSettings</span><span class="op"><</span><span class="ident">H</span><span class="op">>></span>,
|
||
}
|
||
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||
<span class="kw">impl</span><span class="op"><</span><span class="ident">H</span>: <span class="lifetime">'static</span><span class="op">></span> <span class="ident">H2Writer</span><span class="op"><</span><span class="ident">H</span><span class="op">></span> {
|
||
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>(
|
||
<span class="ident">respond</span>: <span class="ident">SendResponse</span><span class="op"><</span><span class="ident">Bytes</span><span class="op">></span>, <span class="ident">settings</span>: <span class="ident">Rc</span><span class="op"><</span><span class="ident">WorkerSettings</span><span class="op"><</span><span class="ident">H</span><span class="op">>></span>,
|
||
) <span class="op">-></span> <span class="ident">H2Writer</span><span class="op"><</span><span class="ident">H</span><span class="op">></span> {
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||
<span class="ident">H2Writer</span> {
|
||
<span class="ident">stream</span>: <span class="prelude-val">None</span>,
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||
<span class="ident">flags</span>: <span class="ident">Flags</span>::<span class="ident">empty</span>(),
|
||
<span class="ident">written</span>: <span class="number">0</span>,
|
||
<span class="ident">buffer</span>: <span class="ident">Output</span>::<span class="ident">Buffer</span>(<span class="ident">settings</span>.<span class="ident">get_bytes</span>()),
|
||
<span class="ident">buffer_capacity</span>: <span class="number">0</span>,
|
||
<span class="ident">respond</span>,
|
||
<span class="ident">settings</span>,
|
||
}
|
||
}
|
||
|
||
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">reset</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">reason</span>: <span class="ident">Reason</span>) {
|
||
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="kw-2">mut</span> <span class="ident">stream</span>) <span class="op">=</span> <span class="self">self</span>.<span class="ident">stream</span>.<span class="ident">take</span>() {
|
||
<span class="ident">stream</span>.<span class="ident">send_reset</span>(<span class="ident">reason</span>)
|
||
}
|
||
}
|
||
}
|
||
|
||
<span class="kw">impl</span><span class="op"><</span><span class="ident">H</span>: <span class="lifetime">'static</span><span class="op">></span> <span class="ident">Drop</span> <span class="kw">for</span> <span class="ident">H2Writer</span><span class="op"><</span><span class="ident">H</span><span class="op">></span> {
|
||
<span class="kw">fn</span> <span class="ident">drop</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) {
|
||
<span class="self">self</span>.<span class="ident">settings</span>.<span class="ident">release_bytes</span>(<span class="self">self</span>.<span class="ident">buffer</span>.<span class="ident">take</span>());
|
||
}
|
||
}
|
||
|
||
<span class="kw">impl</span><span class="op"><</span><span class="ident">H</span>: <span class="lifetime">'static</span><span class="op">></span> <span class="ident">Writer</span> <span class="kw">for</span> <span class="ident">H2Writer</span><span class="op"><</span><span class="ident">H</span><span class="op">></span> {
|
||
<span class="kw">fn</span> <span class="ident">written</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">u64</span> {
|
||
<span class="self">self</span>.<span class="ident">written</span>
|
||
}
|
||
|
||
<span class="attribute">#[<span class="ident">inline</span>]</span>
|
||
<span class="kw">fn</span> <span class="ident">set_date</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) {
|
||
<span class="self">self</span>.<span class="ident">settings</span>.<span class="ident">set_date</span>(<span class="self">self</span>.<span class="ident">buffer</span>.<span class="ident">as_mut</span>(), <span class="bool-val">true</span>)
|
||
}
|
||
|
||
<span class="attribute">#[<span class="ident">inline</span>]</span>
|
||
<span class="kw">fn</span> <span class="ident">buffer</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">BytesMut</span> {
|
||
<span class="self">self</span>.<span class="ident">buffer</span>.<span class="ident">as_mut</span>()
|
||
}
|
||
|
||
<span class="kw">fn</span> <span class="ident">start</span>(
|
||
<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">req</span>: <span class="kw-2">&</span><span class="ident">Request</span>, <span class="ident">msg</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">HttpResponse</span>, <span class="ident">encoding</span>: <span class="ident">ContentEncoding</span>,
|
||
) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">WriterState</span><span class="op">></span> {
|
||
<span class="comment">// prepare response</span>
|
||
<span class="self">self</span>.<span class="ident">flags</span>.<span class="ident">insert</span>(<span class="ident">Flags</span>::<span class="ident">STARTED</span>);
|
||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">info</span> <span class="op">=</span> <span class="ident">ResponseInfo</span>::<span class="ident">new</span>(<span class="ident">req</span>.<span class="ident">inner</span>.<span class="ident">method</span> <span class="op">==</span> <span class="ident">Method</span>::<span class="ident">HEAD</span>);
|
||
<span class="self">self</span>.<span class="ident">buffer</span>.<span class="ident">for_server</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">info</span>, <span class="kw-2">&</span><span class="ident">req</span>.<span class="ident">inner</span>, <span class="ident">msg</span>, <span class="ident">encoding</span>);
|
||
|
||
<span class="comment">// http2 specific</span>
|
||
<span class="ident">msg</span>.<span class="ident">headers_mut</span>().<span class="ident">remove</span>(<span class="ident">CONNECTION</span>);
|
||
<span class="ident">msg</span>.<span class="ident">headers_mut</span>().<span class="ident">remove</span>(<span class="ident">TRANSFER_ENCODING</span>);
|
||
|
||
<span class="comment">// using helpers::date is quite a lot faster</span>
|
||
<span class="kw">if</span> <span class="op">!</span><span class="ident">msg</span>.<span class="ident">headers</span>().<span class="ident">contains_key</span>(<span class="ident">DATE</span>) {
|
||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">bytes</span> <span class="op">=</span> <span class="ident">BytesMut</span>::<span class="ident">with_capacity</span>(<span class="number">29</span>);
|
||
<span class="self">self</span>.<span class="ident">settings</span>.<span class="ident">set_date</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">bytes</span>, <span class="bool-val">false</span>);
|
||
<span class="ident">msg</span>.<span class="ident">headers_mut</span>()
|
||
.<span class="ident">insert</span>(<span class="ident">DATE</span>, <span class="ident">HeaderValue</span>::<span class="ident">try_from</span>(<span class="ident">bytes</span>.<span class="ident">freeze</span>()).<span class="ident">unwrap</span>());
|
||
}
|
||
|
||
<span class="kw">let</span> <span class="ident">body</span> <span class="op">=</span> <span class="ident">msg</span>.<span class="ident">replace_body</span>(<span class="ident">Body</span>::<span class="ident">Empty</span>);
|
||
<span class="kw">match</span> <span class="ident">body</span> {
|
||
<span class="ident">Body</span>::<span class="ident">Binary</span>(<span class="kw-2">ref</span> <span class="ident">bytes</span>) <span class="op">=></span> {
|
||
<span class="kw">if</span> <span class="ident">bytes</span>.<span class="ident">is_empty</span>() {
|
||
<span class="ident">msg</span>.<span class="ident">headers_mut</span>()
|
||
.<span class="ident">insert</span>(<span class="ident">CONTENT_LENGTH</span>, <span class="ident">HeaderValue</span>::<span class="ident">from_static</span>(<span class="string">"0"</span>));
|
||
<span class="self">self</span>.<span class="ident">flags</span>.<span class="ident">insert</span>(<span class="ident">Flags</span>::<span class="ident">EOF</span>);
|
||
} <span class="kw">else</span> {
|
||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">val</span> <span class="op">=</span> <span class="ident">BytesMut</span>::<span class="ident">new</span>();
|
||
<span class="ident">helpers</span>::<span class="ident">convert_usize</span>(<span class="ident">bytes</span>.<span class="ident">len</span>(), <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">val</span>);
|
||
<span class="kw">let</span> <span class="ident">l</span> <span class="op">=</span> <span class="ident">val</span>.<span class="ident">len</span>();
|
||
<span class="ident">msg</span>.<span class="ident">headers_mut</span>().<span class="ident">insert</span>(
|
||
<span class="ident">CONTENT_LENGTH</span>,
|
||
<span class="ident">HeaderValue</span>::<span class="ident">try_from</span>(<span class="ident">val</span>.<span class="ident">split_to</span>(<span class="ident">l</span> <span class="op">-</span> <span class="number">2</span>).<span class="ident">freeze</span>()).<span class="ident">unwrap</span>(),
|
||
);
|
||
}
|
||
}
|
||
<span class="ident">Body</span>::<span class="ident">Empty</span> <span class="op">=></span> {
|
||
<span class="self">self</span>.<span class="ident">flags</span>.<span class="ident">insert</span>(<span class="ident">Flags</span>::<span class="ident">EOF</span>);
|
||
<span class="ident">msg</span>.<span class="ident">headers_mut</span>()
|
||
.<span class="ident">insert</span>(<span class="ident">CONTENT_LENGTH</span>, <span class="ident">HeaderValue</span>::<span class="ident">from_static</span>(<span class="string">"0"</span>));
|
||
}
|
||
<span class="kw">_</span> <span class="op">=></span> (),
|
||
}
|
||
|
||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">resp</span> <span class="op">=</span> <span class="ident">Response</span>::<span class="ident">new</span>(());
|
||
<span class="kw-2">*</span><span class="ident">resp</span>.<span class="ident">status_mut</span>() <span class="op">=</span> <span class="ident">msg</span>.<span class="ident">status</span>();
|
||
<span class="kw-2">*</span><span class="ident">resp</span>.<span class="ident">version_mut</span>() <span class="op">=</span> <span class="ident">Version</span>::<span class="ident">HTTP_2</span>;
|
||
<span class="kw">for</span> (<span class="ident">key</span>, <span class="ident">value</span>) <span class="kw">in</span> <span class="ident">msg</span>.<span class="ident">headers</span>().<span class="ident">iter</span>() {
|
||
<span class="ident">resp</span>.<span class="ident">headers_mut</span>().<span class="ident">insert</span>(<span class="ident">key</span>, <span class="ident">value</span>.<span class="ident">clone</span>());
|
||
}
|
||
|
||
<span class="kw">match</span> <span class="self">self</span>
|
||
.<span class="ident">respond</span>
|
||
.<span class="ident">send_response</span>(<span class="ident">resp</span>, <span class="self">self</span>.<span class="ident">flags</span>.<span class="ident">contains</span>(<span class="ident">Flags</span>::<span class="ident">EOF</span>))
|
||
{
|
||
<span class="prelude-val">Ok</span>(<span class="ident">stream</span>) <span class="op">=></span> <span class="self">self</span>.<span class="ident">stream</span> <span class="op">=</span> <span class="prelude-val">Some</span>(<span class="ident">stream</span>),
|
||
<span class="prelude-val">Err</span>(<span class="kw">_</span>) <span class="op">=></span> <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">io</span>::<span class="ident">Error</span>::<span class="ident">new</span>(<span class="ident">io</span>::<span class="ident">ErrorKind</span>::<span class="ident">Other</span>, <span class="string">"err"</span>)),
|
||
}
|
||
|
||
<span class="macro">trace</span><span class="macro">!</span>(<span class="string">"Response: {:?}"</span>, <span class="ident">msg</span>);
|
||
|
||
<span class="kw">if</span> <span class="kw">let</span> <span class="ident">Body</span>::<span class="ident">Binary</span>(<span class="ident">bytes</span>) <span class="op">=</span> <span class="ident">body</span> {
|
||
<span class="kw">if</span> <span class="ident">bytes</span>.<span class="ident">is_empty</span>() {
|
||
<span class="prelude-val">Ok</span>(<span class="ident">WriterState</span>::<span class="ident">Done</span>)
|
||
} <span class="kw">else</span> {
|
||
<span class="self">self</span>.<span class="ident">flags</span>.<span class="ident">insert</span>(<span class="ident">Flags</span>::<span class="ident">EOF</span>);
|
||
<span class="self">self</span>.<span class="ident">written</span> <span class="op">=</span> <span class="ident">bytes</span>.<span class="ident">len</span>() <span class="kw">as</span> <span class="ident">u64</span>;
|
||
<span class="self">self</span>.<span class="ident">buffer</span>.<span class="ident">write</span>(<span class="ident">bytes</span>.<span class="ident">as_ref</span>())<span class="question-mark">?</span>;
|
||
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="kw-2">ref</span> <span class="kw-2">mut</span> <span class="ident">stream</span>) <span class="op">=</span> <span class="self">self</span>.<span class="ident">stream</span> {
|
||
<span class="self">self</span>.<span class="ident">flags</span>.<span class="ident">insert</span>(<span class="ident">Flags</span>::<span class="ident">RESERVED</span>);
|
||
<span class="ident">stream</span>.<span class="ident">reserve_capacity</span>(<span class="ident">cmp</span>::<span class="ident">min</span>(<span class="self">self</span>.<span class="ident">buffer</span>.<span class="ident">len</span>(), <span class="ident">CHUNK_SIZE</span>));
|
||
}
|
||
<span class="prelude-val">Ok</span>(<span class="ident">WriterState</span>::<span class="ident">Pause</span>)
|
||
}
|
||
} <span class="kw">else</span> {
|
||
<span class="ident">msg</span>.<span class="ident">replace_body</span>(<span class="ident">body</span>);
|
||
<span class="self">self</span>.<span class="ident">buffer_capacity</span> <span class="op">=</span> <span class="ident">msg</span>.<span class="ident">write_buffer_capacity</span>();
|
||
<span class="prelude-val">Ok</span>(<span class="ident">WriterState</span>::<span class="ident">Done</span>)
|
||
}
|
||
}
|
||
|
||
<span class="kw">fn</span> <span class="ident">write</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">payload</span>: <span class="kw-2">&</span><span class="ident">Binary</span>) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">WriterState</span><span class="op">></span> {
|
||
<span class="self">self</span>.<span class="ident">written</span> <span class="op">=</span> <span class="ident">payload</span>.<span class="ident">len</span>() <span class="kw">as</span> <span class="ident">u64</span>;
|
||
|
||
<span class="kw">if</span> <span class="op">!</span><span class="self">self</span>.<span class="ident">flags</span>.<span class="ident">contains</span>(<span class="ident">Flags</span>::<span class="ident">DISCONNECTED</span>) {
|
||
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">flags</span>.<span class="ident">contains</span>(<span class="ident">Flags</span>::<span class="ident">STARTED</span>) {
|
||
<span class="comment">// TODO: add warning, write after EOF</span>
|
||
<span class="self">self</span>.<span class="ident">buffer</span>.<span class="ident">write</span>(<span class="ident">payload</span>.<span class="ident">as_ref</span>())<span class="question-mark">?</span>;
|
||
} <span class="kw">else</span> {
|
||
<span class="comment">// might be response for EXCEPT</span>
|
||
<span class="macro">error</span><span class="macro">!</span>(<span class="string">"Not supported"</span>);
|
||
}
|
||
}
|
||
|
||
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">buffer</span>.<span class="ident">len</span>() <span class="op">></span> <span class="self">self</span>.<span class="ident">buffer_capacity</span> {
|
||
<span class="prelude-val">Ok</span>(<span class="ident">WriterState</span>::<span class="ident">Pause</span>)
|
||
} <span class="kw">else</span> {
|
||
<span class="prelude-val">Ok</span>(<span class="ident">WriterState</span>::<span class="ident">Done</span>)
|
||
}
|
||
}
|
||
|
||
<span class="kw">fn</span> <span class="ident">write_eof</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">WriterState</span><span class="op">></span> {
|
||
<span class="self">self</span>.<span class="ident">flags</span>.<span class="ident">insert</span>(<span class="ident">Flags</span>::<span class="ident">EOF</span>);
|
||
<span class="kw">if</span> <span class="op">!</span><span class="self">self</span>.<span class="ident">buffer</span>.<span class="ident">write_eof</span>()<span class="question-mark">?</span> {
|
||
<span class="prelude-val">Err</span>(<span class="ident">io</span>::<span class="ident">Error</span>::<span class="ident">new</span>(
|
||
<span class="ident">io</span>::<span class="ident">ErrorKind</span>::<span class="ident">Other</span>,
|
||
<span class="string">"Last payload item, but eof is not reached"</span>,
|
||
))
|
||
} <span class="kw">else</span> <span class="kw">if</span> <span class="self">self</span>.<span class="ident">buffer</span>.<span class="ident">len</span>() <span class="op">></span> <span class="ident">MAX_WRITE_BUFFER_SIZE</span> {
|
||
<span class="prelude-val">Ok</span>(<span class="ident">WriterState</span>::<span class="ident">Pause</span>)
|
||
} <span class="kw">else</span> {
|
||
<span class="prelude-val">Ok</span>(<span class="ident">WriterState</span>::<span class="ident">Done</span>)
|
||
}
|
||
}
|
||
|
||
<span class="kw">fn</span> <span class="ident">poll_completed</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">_shutdown</span>: <span class="ident">bool</span>) <span class="op">-></span> <span class="ident">Poll</span><span class="op"><</span>(), <span class="ident">io</span>::<span class="ident">Error</span><span class="op">></span> {
|
||
<span class="kw">if</span> <span class="op">!</span><span class="self">self</span>.<span class="ident">flags</span>.<span class="ident">contains</span>(<span class="ident">Flags</span>::<span class="ident">STARTED</span>) {
|
||
<span class="kw">return</span> <span class="prelude-val">Ok</span>(<span class="ident">Async</span>::<span class="ident">NotReady</span>);
|
||
}
|
||
|
||
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="kw-2">ref</span> <span class="kw-2">mut</span> <span class="ident">stream</span>) <span class="op">=</span> <span class="self">self</span>.<span class="ident">stream</span> {
|
||
<span class="comment">// reserve capacity</span>
|
||
<span class="kw">if</span> <span class="op">!</span><span class="self">self</span>.<span class="ident">flags</span>.<span class="ident">contains</span>(<span class="ident">Flags</span>::<span class="ident">RESERVED</span>) <span class="op">&&</span> <span class="op">!</span><span class="self">self</span>.<span class="ident">buffer</span>.<span class="ident">is_empty</span>() {
|
||
<span class="self">self</span>.<span class="ident">flags</span>.<span class="ident">insert</span>(<span class="ident">Flags</span>::<span class="ident">RESERVED</span>);
|
||
<span class="ident">stream</span>.<span class="ident">reserve_capacity</span>(<span class="ident">cmp</span>::<span class="ident">min</span>(<span class="self">self</span>.<span class="ident">buffer</span>.<span class="ident">len</span>(), <span class="ident">CHUNK_SIZE</span>));
|
||
}
|
||
|
||
<span class="kw">loop</span> {
|
||
<span class="kw">match</span> <span class="ident">stream</span>.<span class="ident">poll_capacity</span>() {
|
||
<span class="prelude-val">Ok</span>(<span class="ident">Async</span>::<span class="ident">NotReady</span>) <span class="op">=></span> <span class="kw">return</span> <span class="prelude-val">Ok</span>(<span class="ident">Async</span>::<span class="ident">NotReady</span>),
|
||
<span class="prelude-val">Ok</span>(<span class="ident">Async</span>::<span class="ident">Ready</span>(<span class="prelude-val">None</span>)) <span class="op">=></span> <span class="kw">return</span> <span class="prelude-val">Ok</span>(<span class="ident">Async</span>::<span class="ident">Ready</span>(())),
|
||
<span class="prelude-val">Ok</span>(<span class="ident">Async</span>::<span class="ident">Ready</span>(<span class="prelude-val">Some</span>(<span class="ident">cap</span>))) <span class="op">=></span> {
|
||
<span class="kw">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">buffer</span>.<span class="ident">len</span>();
|
||
<span class="kw">let</span> <span class="ident">bytes</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">buffer</span>.<span class="ident">split_to</span>(<span class="ident">cmp</span>::<span class="ident">min</span>(<span class="ident">cap</span>, <span class="ident">len</span>));
|
||
<span class="kw">let</span> <span class="ident">eof</span> <span class="op">=</span>
|
||
<span class="self">self</span>.<span class="ident">buffer</span>.<span class="ident">is_empty</span>() <span class="op">&&</span> <span class="self">self</span>.<span class="ident">flags</span>.<span class="ident">contains</span>(<span class="ident">Flags</span>::<span class="ident">EOF</span>);
|
||
<span class="self">self</span>.<span class="ident">written</span> <span class="op">+=</span> <span class="ident">bytes</span>.<span class="ident">len</span>() <span class="kw">as</span> <span class="ident">u64</span>;
|
||
|
||
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Err</span>(<span class="ident">e</span>) <span class="op">=</span> <span class="ident">stream</span>.<span class="ident">send_data</span>(<span class="ident">bytes</span>.<span class="ident">freeze</span>(), <span class="ident">eof</span>) {
|
||
<span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">io</span>::<span class="ident">Error</span>::<span class="ident">new</span>(<span class="ident">io</span>::<span class="ident">ErrorKind</span>::<span class="ident">Other</span>, <span class="ident">e</span>));
|
||
} <span class="kw">else</span> <span class="kw">if</span> <span class="op">!</span><span class="self">self</span>.<span class="ident">buffer</span>.<span class="ident">is_empty</span>() {
|
||
<span class="kw">let</span> <span class="ident">cap</span> <span class="op">=</span> <span class="ident">cmp</span>::<span class="ident">min</span>(<span class="self">self</span>.<span class="ident">buffer</span>.<span class="ident">len</span>(), <span class="ident">CHUNK_SIZE</span>);
|
||
<span class="ident">stream</span>.<span class="ident">reserve_capacity</span>(<span class="ident">cap</span>);
|
||
} <span class="kw">else</span> {
|
||
<span class="self">self</span>.<span class="ident">flags</span>.<span class="ident">remove</span>(<span class="ident">Flags</span>::<span class="ident">RESERVED</span>);
|
||
<span class="kw">return</span> <span class="prelude-val">Ok</span>(<span class="ident">Async</span>::<span class="ident">NotReady</span>);
|
||
}
|
||
}
|
||
<span class="prelude-val">Err</span>(<span class="ident">e</span>) <span class="op">=></span> <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">io</span>::<span class="ident">Error</span>::<span class="ident">new</span>(<span class="ident">io</span>::<span class="ident">ErrorKind</span>::<span class="ident">Other</span>, <span class="ident">e</span>)),
|
||
}
|
||
}
|
||
}
|
||
<span class="prelude-val">Ok</span>(<span class="ident">Async</span>::<span class="ident">NotReady</span>)
|
||
}
|
||
}
|
||
</pre>
|
||
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