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actix-website/static/api/actix-web/0.7.12/src/actix_web/ws/frame.rs.html
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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/ws/frame.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>frame.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">&#9776;</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 ">
<span class="kw">use</span> <span class="ident">byteorder</span>::{<span class="ident">ByteOrder</span>, <span class="ident">LittleEndian</span>, <span class="ident">NetworkEndian</span>};
<span class="kw">use</span> <span class="ident">bytes</span>::{<span class="ident">BufMut</span>, <span class="ident">Bytes</span>, <span class="ident">BytesMut</span>};
<span class="kw">use</span> <span class="ident">futures</span>::{<span class="ident">Async</span>, <span class="ident">Poll</span>, <span class="ident">Stream</span>};
<span class="kw">use</span> <span class="ident">rand</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fmt</span>;
<span class="kw">use</span> <span class="ident">body</span>::<span class="ident">Binary</span>;
<span class="kw">use</span> <span class="ident">error</span>::<span class="ident">PayloadError</span>;
<span class="kw">use</span> <span class="ident">payload</span>::<span class="ident">PayloadBuffer</span>;
<span class="kw">use</span> <span class="ident">ws</span>::<span class="ident">mask</span>::<span class="ident">apply_mask</span>;
<span class="kw">use</span> <span class="ident">ws</span>::<span class="ident">proto</span>::{<span class="ident">CloseCode</span>, <span class="ident">CloseReason</span>, <span class="ident">OpCode</span>};
<span class="kw">use</span> <span class="ident">ws</span>::<span class="ident">ProtocolError</span>;
<span class="doccomment">/// A struct representing a `WebSocket` frame.</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Frame</span> {
<span class="ident">finished</span>: <span class="ident">bool</span>,
<span class="ident">opcode</span>: <span class="ident">OpCode</span>,
<span class="ident">payload</span>: <span class="ident">Binary</span>,
}
<span class="kw">impl</span> <span class="ident">Frame</span> {
<span class="doccomment">/// Destruct frame</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">unpack</span>(<span class="self">self</span>) <span class="op">-&gt;</span> (<span class="ident">bool</span>, <span class="ident">OpCode</span>, <span class="ident">Binary</span>) {
(<span class="self">self</span>.<span class="ident">finished</span>, <span class="self">self</span>.<span class="ident">opcode</span>, <span class="self">self</span>.<span class="ident">payload</span>)
}
<span class="doccomment">/// Create a new Close control frame.</span>
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">close</span>(<span class="ident">reason</span>: <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">CloseReason</span><span class="op">&gt;</span>, <span class="ident">genmask</span>: <span class="ident">bool</span>) <span class="op">-&gt;</span> <span class="ident">FramedMessage</span> {
<span class="kw">let</span> <span class="ident">payload</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">reason</span> {
<span class="prelude-val">None</span> <span class="op">=&gt;</span> <span class="ident">Vec</span>::<span class="ident">new</span>(),
<span class="prelude-val">Some</span>(<span class="ident">reason</span>) <span class="op">=&gt;</span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">code_bytes</span> <span class="op">=</span> [<span class="number">0</span>; <span class="number">2</span>];
<span class="ident">NetworkEndian</span>::<span class="ident">write_u16</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">code_bytes</span>, <span class="ident">reason</span>.<span class="ident">code</span>.<span class="ident">into</span>());
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">payload</span> <span class="op">=</span> <span class="ident">Vec</span>::<span class="ident">from</span>(<span class="kw-2">&amp;</span><span class="ident">code_bytes</span>[..]);
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">description</span>) <span class="op">=</span> <span class="ident">reason</span>.<span class="ident">description</span> {
<span class="ident">payload</span>.<span class="ident">extend</span>(<span class="ident">description</span>.<span class="ident">as_bytes</span>());
}
<span class="ident">payload</span>
}
};
<span class="ident">Frame</span>::<span class="ident">message</span>(<span class="ident">payload</span>, <span class="ident">OpCode</span>::<span class="ident">Close</span>, <span class="bool-val">true</span>, <span class="ident">genmask</span>)
}
<span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">&quot;cargo-clippy&quot;</span>, <span class="ident">allow</span>(<span class="ident">clippy</span>::<span class="ident">type_complexity</span>))]</span>
<span class="kw">fn</span> <span class="ident">read_copy_md</span><span class="op">&lt;</span><span class="ident">S</span><span class="op">&gt;</span>(
<span class="ident">pl</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">PayloadBuffer</span><span class="op">&lt;</span><span class="ident">S</span><span class="op">&gt;</span>, <span class="ident">server</span>: <span class="ident">bool</span>, <span class="ident">max_size</span>: <span class="ident">usize</span>,
) <span class="op">-&gt;</span> <span class="ident">Poll</span><span class="op">&lt;</span><span class="prelude-ty">Option</span><span class="op">&lt;</span>(<span class="ident">usize</span>, <span class="ident">bool</span>, <span class="ident">OpCode</span>, <span class="ident">usize</span>, <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">u32</span><span class="op">&gt;</span>)<span class="op">&gt;</span>, <span class="ident">ProtocolError</span><span class="op">&gt;</span>
<span class="kw">where</span>
<span class="ident">S</span>: <span class="ident">Stream</span><span class="op">&lt;</span><span class="ident">Item</span> <span class="op">=</span> <span class="ident">Bytes</span>, <span class="ident">Error</span> <span class="op">=</span> <span class="ident">PayloadError</span><span class="op">&gt;</span>,
{
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">idx</span> <span class="op">=</span> <span class="number">2</span>;
<span class="kw">let</span> <span class="ident">buf</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">pl</span>.<span class="ident">copy</span>(<span class="number">2</span>)<span class="question-mark">?</span> {
<span class="ident">Async</span>::<span class="ident">Ready</span>(<span class="prelude-val">Some</span>(<span class="ident">buf</span>)) <span class="op">=&gt;</span> <span class="ident">buf</span>,
<span class="ident">Async</span>::<span class="ident">Ready</span>(<span class="prelude-val">None</span>) <span class="op">=&gt;</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">None</span>)),
<span class="ident">Async</span>::<span class="ident">NotReady</span> <span class="op">=&gt;</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">let</span> <span class="ident">first</span> <span class="op">=</span> <span class="ident">buf</span>[<span class="number">0</span>];
<span class="kw">let</span> <span class="ident">second</span> <span class="op">=</span> <span class="ident">buf</span>[<span class="number">1</span>];
<span class="kw">let</span> <span class="ident">finished</span> <span class="op">=</span> <span class="ident">first</span> <span class="op">&amp;</span> <span class="number">0x80</span> <span class="op">!=</span> <span class="number">0</span>;
<span class="comment">// check masking</span>
<span class="kw">let</span> <span class="ident">masked</span> <span class="op">=</span> <span class="ident">second</span> <span class="op">&amp;</span> <span class="number">0x80</span> <span class="op">!=</span> <span class="number">0</span>;
<span class="kw">if</span> <span class="op">!</span><span class="ident">masked</span> <span class="op">&amp;&amp;</span> <span class="ident">server</span> {
<span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">ProtocolError</span>::<span class="ident">UnmaskedFrame</span>);
} <span class="kw">else</span> <span class="kw">if</span> <span class="ident">masked</span> <span class="op">&amp;&amp;</span> <span class="op">!</span><span class="ident">server</span> {
<span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">ProtocolError</span>::<span class="ident">MaskedFrame</span>);
}
<span class="comment">// Op code</span>
<span class="kw">let</span> <span class="ident">opcode</span> <span class="op">=</span> <span class="ident">OpCode</span>::<span class="ident">from</span>(<span class="ident">first</span> <span class="op">&amp;</span> <span class="number">0x0F</span>);
<span class="kw">if</span> <span class="kw">let</span> <span class="ident">OpCode</span>::<span class="ident">Bad</span> <span class="op">=</span> <span class="ident">opcode</span> {
<span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">ProtocolError</span>::<span class="ident">InvalidOpcode</span>(<span class="ident">first</span> <span class="op">&amp;</span> <span class="number">0x0F</span>));
}
<span class="kw">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="ident">second</span> <span class="op">&amp;</span> <span class="number">0x7F</span>;
<span class="kw">let</span> <span class="ident">length</span> <span class="op">=</span> <span class="kw">if</span> <span class="ident">len</span> <span class="op">==</span> <span class="number">126</span> {
<span class="kw">let</span> <span class="ident">buf</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">pl</span>.<span class="ident">copy</span>(<span class="number">4</span>)<span class="question-mark">?</span> {
<span class="ident">Async</span>::<span class="ident">Ready</span>(<span class="prelude-val">Some</span>(<span class="ident">buf</span>)) <span class="op">=&gt;</span> <span class="ident">buf</span>,
<span class="ident">Async</span>::<span class="ident">Ready</span>(<span class="prelude-val">None</span>) <span class="op">=&gt;</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">None</span>)),
<span class="ident">Async</span>::<span class="ident">NotReady</span> <span class="op">=&gt;</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">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="ident">NetworkEndian</span>::<span class="ident">read_uint</span>(<span class="kw-2">&amp;</span><span class="ident">buf</span>[<span class="ident">idx</span>..], <span class="number">2</span>) <span class="kw">as</span> <span class="ident">usize</span>;
<span class="ident">idx</span> <span class="op">+=</span> <span class="number">2</span>;
<span class="ident">len</span>
} <span class="kw">else</span> <span class="kw">if</span> <span class="ident">len</span> <span class="op">==</span> <span class="number">127</span> {
<span class="kw">let</span> <span class="ident">buf</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">pl</span>.<span class="ident">copy</span>(<span class="number">10</span>)<span class="question-mark">?</span> {
<span class="ident">Async</span>::<span class="ident">Ready</span>(<span class="prelude-val">Some</span>(<span class="ident">buf</span>)) <span class="op">=&gt;</span> <span class="ident">buf</span>,
<span class="ident">Async</span>::<span class="ident">Ready</span>(<span class="prelude-val">None</span>) <span class="op">=&gt;</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">None</span>)),
<span class="ident">Async</span>::<span class="ident">NotReady</span> <span class="op">=&gt;</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">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="ident">NetworkEndian</span>::<span class="ident">read_uint</span>(<span class="kw-2">&amp;</span><span class="ident">buf</span>[<span class="ident">idx</span>..], <span class="number">8</span>);
<span class="kw">if</span> <span class="ident">len</span> <span class="op">&gt;</span> <span class="ident">max_size</span> <span class="kw">as</span> <span class="ident">u64</span> {
<span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">ProtocolError</span>::<span class="ident">Overflow</span>);
}
<span class="ident">idx</span> <span class="op">+=</span> <span class="number">8</span>;
<span class="ident">len</span> <span class="kw">as</span> <span class="ident">usize</span>
} <span class="kw">else</span> {
<span class="ident">len</span> <span class="kw">as</span> <span class="ident">usize</span>
};
<span class="comment">// check for max allowed size</span>
<span class="kw">if</span> <span class="ident">length</span> <span class="op">&gt;</span> <span class="ident">max_size</span> {
<span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">ProtocolError</span>::<span class="ident">Overflow</span>);
}
<span class="kw">let</span> <span class="ident">mask</span> <span class="op">=</span> <span class="kw">if</span> <span class="ident">server</span> {
<span class="kw">let</span> <span class="ident">buf</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">pl</span>.<span class="ident">copy</span>(<span class="ident">idx</span> <span class="op">+</span> <span class="number">4</span>)<span class="question-mark">?</span> {
<span class="ident">Async</span>::<span class="ident">Ready</span>(<span class="prelude-val">Some</span>(<span class="ident">buf</span>)) <span class="op">=&gt;</span> <span class="ident">buf</span>,
<span class="ident">Async</span>::<span class="ident">Ready</span>(<span class="prelude-val">None</span>) <span class="op">=&gt;</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">None</span>)),
<span class="ident">Async</span>::<span class="ident">NotReady</span> <span class="op">=&gt;</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">let</span> <span class="ident">mask</span>: <span class="kw-2">&amp;</span>[<span class="ident">u8</span>] <span class="op">=</span> <span class="kw-2">&amp;</span><span class="ident">buf</span>[<span class="ident">idx</span>..<span class="ident">idx</span> <span class="op">+</span> <span class="number">4</span>];
<span class="kw">let</span> <span class="ident">mask_u32</span> <span class="op">=</span> <span class="ident">LittleEndian</span>::<span class="ident">read_u32</span>(<span class="ident">mask</span>);
<span class="ident">idx</span> <span class="op">+=</span> <span class="number">4</span>;
<span class="prelude-val">Some</span>(<span class="ident">mask_u32</span>)
} <span class="kw">else</span> {
<span class="prelude-val">None</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">idx</span>, <span class="ident">finished</span>, <span class="ident">opcode</span>, <span class="ident">length</span>, <span class="ident">mask</span>))))
}
<span class="kw">fn</span> <span class="ident">read_chunk_md</span>(
<span class="ident">chunk</span>: <span class="kw-2">&amp;</span>[<span class="ident">u8</span>], <span class="ident">server</span>: <span class="ident">bool</span>, <span class="ident">max_size</span>: <span class="ident">usize</span>,
) <span class="op">-&gt;</span> <span class="ident">Poll</span><span class="op">&lt;</span>(<span class="ident">usize</span>, <span class="ident">bool</span>, <span class="ident">OpCode</span>, <span class="ident">usize</span>, <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">u32</span><span class="op">&gt;</span>), <span class="ident">ProtocolError</span><span class="op">&gt;</span> {
<span class="kw">let</span> <span class="ident">chunk_len</span> <span class="op">=</span> <span class="ident">chunk</span>.<span class="ident">len</span>();
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">idx</span> <span class="op">=</span> <span class="number">2</span>;
<span class="kw">if</span> <span class="ident">chunk_len</span> <span class="op">&lt;</span> <span class="number">2</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">let</span> <span class="ident">first</span> <span class="op">=</span> <span class="ident">chunk</span>[<span class="number">0</span>];
<span class="kw">let</span> <span class="ident">second</span> <span class="op">=</span> <span class="ident">chunk</span>[<span class="number">1</span>];
<span class="kw">let</span> <span class="ident">finished</span> <span class="op">=</span> <span class="ident">first</span> <span class="op">&amp;</span> <span class="number">0x80</span> <span class="op">!=</span> <span class="number">0</span>;
<span class="comment">// check masking</span>
<span class="kw">let</span> <span class="ident">masked</span> <span class="op">=</span> <span class="ident">second</span> <span class="op">&amp;</span> <span class="number">0x80</span> <span class="op">!=</span> <span class="number">0</span>;
<span class="kw">if</span> <span class="op">!</span><span class="ident">masked</span> <span class="op">&amp;&amp;</span> <span class="ident">server</span> {
<span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">ProtocolError</span>::<span class="ident">UnmaskedFrame</span>);
} <span class="kw">else</span> <span class="kw">if</span> <span class="ident">masked</span> <span class="op">&amp;&amp;</span> <span class="op">!</span><span class="ident">server</span> {
<span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">ProtocolError</span>::<span class="ident">MaskedFrame</span>);
}
<span class="comment">// Op code</span>
<span class="kw">let</span> <span class="ident">opcode</span> <span class="op">=</span> <span class="ident">OpCode</span>::<span class="ident">from</span>(<span class="ident">first</span> <span class="op">&amp;</span> <span class="number">0x0F</span>);
<span class="kw">if</span> <span class="kw">let</span> <span class="ident">OpCode</span>::<span class="ident">Bad</span> <span class="op">=</span> <span class="ident">opcode</span> {
<span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">ProtocolError</span>::<span class="ident">InvalidOpcode</span>(<span class="ident">first</span> <span class="op">&amp;</span> <span class="number">0x0F</span>));
}
<span class="kw">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="ident">second</span> <span class="op">&amp;</span> <span class="number">0x7F</span>;
<span class="kw">let</span> <span class="ident">length</span> <span class="op">=</span> <span class="kw">if</span> <span class="ident">len</span> <span class="op">==</span> <span class="number">126</span> {
<span class="kw">if</span> <span class="ident">chunk_len</span> <span class="op">&lt;</span> <span class="number">4</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">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="ident">NetworkEndian</span>::<span class="ident">read_uint</span>(<span class="kw-2">&amp;</span><span class="ident">chunk</span>[<span class="ident">idx</span>..], <span class="number">2</span>) <span class="kw">as</span> <span class="ident">usize</span>;
<span class="ident">idx</span> <span class="op">+=</span> <span class="number">2</span>;
<span class="ident">len</span>
} <span class="kw">else</span> <span class="kw">if</span> <span class="ident">len</span> <span class="op">==</span> <span class="number">127</span> {
<span class="kw">if</span> <span class="ident">chunk_len</span> <span class="op">&lt;</span> <span class="number">10</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">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="ident">NetworkEndian</span>::<span class="ident">read_uint</span>(<span class="kw-2">&amp;</span><span class="ident">chunk</span>[<span class="ident">idx</span>..], <span class="number">8</span>);
<span class="kw">if</span> <span class="ident">len</span> <span class="op">&gt;</span> <span class="ident">max_size</span> <span class="kw">as</span> <span class="ident">u64</span> {
<span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">ProtocolError</span>::<span class="ident">Overflow</span>);
}
<span class="ident">idx</span> <span class="op">+=</span> <span class="number">8</span>;
<span class="ident">len</span> <span class="kw">as</span> <span class="ident">usize</span>
} <span class="kw">else</span> {
<span class="ident">len</span> <span class="kw">as</span> <span class="ident">usize</span>
};
<span class="comment">// check for max allowed size</span>
<span class="kw">if</span> <span class="ident">length</span> <span class="op">&gt;</span> <span class="ident">max_size</span> {
<span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">ProtocolError</span>::<span class="ident">Overflow</span>);
}
<span class="kw">let</span> <span class="ident">mask</span> <span class="op">=</span> <span class="kw">if</span> <span class="ident">server</span> {
<span class="kw">if</span> <span class="ident">chunk_len</span> <span class="op">&lt;</span> <span class="ident">idx</span> <span class="op">+</span> <span class="number">4</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">let</span> <span class="ident">mask</span>: <span class="kw-2">&amp;</span>[<span class="ident">u8</span>] <span class="op">=</span> <span class="kw-2">&amp;</span><span class="ident">chunk</span>[<span class="ident">idx</span>..<span class="ident">idx</span> <span class="op">+</span> <span class="number">4</span>];
<span class="kw">let</span> <span class="ident">mask_u32</span> <span class="op">=</span> <span class="ident">LittleEndian</span>::<span class="ident">read_u32</span>(<span class="ident">mask</span>);
<span class="ident">idx</span> <span class="op">+=</span> <span class="number">4</span>;
<span class="prelude-val">Some</span>(<span class="ident">mask_u32</span>)
} <span class="kw">else</span> {
<span class="prelude-val">None</span>
};
<span class="prelude-val">Ok</span>(<span class="ident">Async</span>::<span class="ident">Ready</span>((<span class="ident">idx</span>, <span class="ident">finished</span>, <span class="ident">opcode</span>, <span class="ident">length</span>, <span class="ident">mask</span>)))
}
<span class="doccomment">/// Parse the input stream into a frame.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">parse</span><span class="op">&lt;</span><span class="ident">S</span><span class="op">&gt;</span>(
<span class="ident">pl</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">PayloadBuffer</span><span class="op">&lt;</span><span class="ident">S</span><span class="op">&gt;</span>, <span class="ident">server</span>: <span class="ident">bool</span>, <span class="ident">max_size</span>: <span class="ident">usize</span>,
) <span class="op">-&gt;</span> <span class="ident">Poll</span><span class="op">&lt;</span><span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">Frame</span><span class="op">&gt;</span>, <span class="ident">ProtocolError</span><span class="op">&gt;</span>
<span class="kw">where</span>
<span class="ident">S</span>: <span class="ident">Stream</span><span class="op">&lt;</span><span class="ident">Item</span> <span class="op">=</span> <span class="ident">Bytes</span>, <span class="ident">Error</span> <span class="op">=</span> <span class="ident">PayloadError</span><span class="op">&gt;</span>,
{
<span class="comment">// try to parse ws frame md from one chunk</span>
<span class="kw">let</span> <span class="ident">result</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">pl</span>.<span class="ident">get_chunk</span>()<span class="question-mark">?</span> {
<span class="ident">Async</span>::<span class="ident">NotReady</span> <span class="op">=&gt;</span> <span class="kw">return</span> <span class="prelude-val">Ok</span>(<span class="ident">Async</span>::<span class="ident">NotReady</span>),
<span class="ident">Async</span>::<span class="ident">Ready</span>(<span class="prelude-val">None</span>) <span class="op">=&gt;</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">None</span>)),
<span class="ident">Async</span>::<span class="ident">Ready</span>(<span class="prelude-val">Some</span>(<span class="ident">chunk</span>)) <span class="op">=&gt;</span> <span class="ident">Frame</span>::<span class="ident">read_chunk_md</span>(<span class="ident">chunk</span>, <span class="ident">server</span>, <span class="ident">max_size</span>)<span class="question-mark">?</span>,
};
<span class="kw">let</span> (<span class="ident">idx</span>, <span class="ident">finished</span>, <span class="ident">opcode</span>, <span class="ident">length</span>, <span class="ident">mask</span>) <span class="op">=</span> <span class="kw">match</span> <span class="ident">result</span> {
<span class="comment">// we may need to join several chunks</span>
<span class="ident">Async</span>::<span class="ident">NotReady</span> <span class="op">=&gt;</span> <span class="kw">match</span> <span class="ident">Frame</span>::<span class="ident">read_copy_md</span>(<span class="ident">pl</span>, <span class="ident">server</span>, <span class="ident">max_size</span>)<span class="question-mark">?</span> {
<span class="ident">Async</span>::<span class="ident">Ready</span>(<span class="prelude-val">Some</span>(<span class="ident">item</span>)) <span class="op">=&gt;</span> <span class="ident">item</span>,
<span class="ident">Async</span>::<span class="ident">NotReady</span> <span class="op">=&gt;</span> <span class="kw">return</span> <span class="prelude-val">Ok</span>(<span class="ident">Async</span>::<span class="ident">NotReady</span>),
<span class="ident">Async</span>::<span class="ident">Ready</span>(<span class="prelude-val">None</span>) <span class="op">=&gt;</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">None</span>)),
},
<span class="ident">Async</span>::<span class="ident">Ready</span>(<span class="ident">item</span>) <span class="op">=&gt;</span> <span class="ident">item</span>,
};
<span class="kw">match</span> <span class="ident">pl</span>.<span class="ident">can_read</span>(<span class="ident">idx</span> <span class="op">+</span> <span class="ident">length</span>)<span class="question-mark">?</span> {
<span class="ident">Async</span>::<span class="ident">Ready</span>(<span class="prelude-val">Some</span>(<span class="bool-val">true</span>)) <span class="op">=&gt;</span> (),
<span class="ident">Async</span>::<span class="ident">Ready</span>(<span class="prelude-val">None</span>) <span class="op">=&gt;</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">None</span>)),
<span class="ident">Async</span>::<span class="ident">Ready</span>(<span class="prelude-val">Some</span>(<span class="bool-val">false</span>)) <span class="op">|</span> <span class="ident">Async</span>::<span class="ident">NotReady</span> <span class="op">=&gt;</span> <span class="kw">return</span> <span class="prelude-val">Ok</span>(<span class="ident">Async</span>::<span class="ident">NotReady</span>),
}
<span class="comment">// remove prefix</span>
<span class="ident">pl</span>.<span class="ident">drop_bytes</span>(<span class="ident">idx</span>);
<span class="comment">// no need for body</span>
<span class="kw">if</span> <span class="ident">length</span> <span class="op">==</span> <span class="number">0</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">Some</span>(<span class="ident">Frame</span> {
<span class="ident">finished</span>,
<span class="ident">opcode</span>,
<span class="ident">payload</span>: <span class="ident">Binary</span>::<span class="ident">from</span>(<span class="string">&quot;&quot;</span>),
})));
}
<span class="kw">let</span> <span class="ident">data</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">pl</span>.<span class="ident">read_exact</span>(<span class="ident">length</span>)<span class="question-mark">?</span> {
<span class="ident">Async</span>::<span class="ident">Ready</span>(<span class="prelude-val">Some</span>(<span class="ident">buf</span>)) <span class="op">=&gt;</span> <span class="ident">buf</span>,
<span class="ident">Async</span>::<span class="ident">Ready</span>(<span class="prelude-val">None</span>) <span class="op">=&gt;</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">None</span>)),
<span class="ident">Async</span>::<span class="ident">NotReady</span> <span class="op">=&gt;</span> <span class="macro">panic</span><span class="macro">!</span>(),
};
<span class="comment">// control frames must have length &lt;= 125</span>
<span class="kw">match</span> <span class="ident">opcode</span> {
<span class="ident">OpCode</span>::<span class="ident">Ping</span> <span class="op">|</span> <span class="ident">OpCode</span>::<span class="ident">Pong</span> <span class="kw">if</span> <span class="ident">length</span> <span class="op">&gt;</span> <span class="number">125</span> <span class="op">=&gt;</span> {
<span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">ProtocolError</span>::<span class="ident">InvalidLength</span>(<span class="ident">length</span>))
}
<span class="ident">OpCode</span>::<span class="ident">Close</span> <span class="kw">if</span> <span class="ident">length</span> <span class="op">&gt;</span> <span class="number">125</span> <span class="op">=&gt;</span> {
<span class="macro">debug</span><span class="macro">!</span>(<span class="string">&quot;Received close frame with payload length exceeding 125. Morphing to protocol close frame.&quot;</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">Some</span>(<span class="ident">Frame</span>::<span class="ident">default</span>())));
}
<span class="kw">_</span> <span class="op">=&gt;</span> (),
}
<span class="comment">// unmask</span>
<span class="kw">let</span> <span class="ident">data</span> <span class="op">=</span> <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">mask</span>) <span class="op">=</span> <span class="ident">mask</span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buf</span> <span class="op">=</span> <span class="ident">BytesMut</span>::<span class="ident">new</span>();
<span class="ident">buf</span>.<span class="ident">extend_from_slice</span>(<span class="kw-2">&amp;</span><span class="ident">data</span>);
<span class="ident">apply_mask</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">buf</span>, <span class="ident">mask</span>);
<span class="ident">buf</span>.<span class="ident">freeze</span>()
} <span class="kw">else</span> {
<span class="ident">data</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">Frame</span> {
<span class="ident">finished</span>,
<span class="ident">opcode</span>,
<span class="ident">payload</span>: <span class="ident">data</span>.<span class="ident">into</span>(),
})))
}
<span class="doccomment">/// Parse the payload of a close frame.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">parse_close_payload</span>(<span class="ident">payload</span>: <span class="kw-2">&amp;</span><span class="ident">Binary</span>) <span class="op">-&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">CloseReason</span><span class="op">&gt;</span> {
<span class="kw">if</span> <span class="ident">payload</span>.<span class="ident">len</span>() <span class="op">&gt;=</span> <span class="number">2</span> {
<span class="kw">let</span> <span class="ident">raw_code</span> <span class="op">=</span> <span class="ident">NetworkEndian</span>::<span class="ident">read_u16</span>(<span class="ident">payload</span>.<span class="ident">as_ref</span>());
<span class="kw">let</span> <span class="ident">code</span> <span class="op">=</span> <span class="ident">CloseCode</span>::<span class="ident">from</span>(<span class="ident">raw_code</span>);
<span class="kw">let</span> <span class="ident">description</span> <span class="op">=</span> <span class="kw">if</span> <span class="ident">payload</span>.<span class="ident">len</span>() <span class="op">&gt;</span> <span class="number">2</span> {
<span class="prelude-val">Some</span>(<span class="ident">String</span>::<span class="ident">from_utf8_lossy</span>(<span class="kw-2">&amp;</span><span class="ident">payload</span>.<span class="ident">as_ref</span>()[<span class="number">2</span>..]).<span class="ident">into</span>())
} <span class="kw">else</span> {
<span class="prelude-val">None</span>
};
<span class="prelude-val">Some</span>(<span class="ident">CloseReason</span> { <span class="ident">code</span>, <span class="ident">description</span> })
} <span class="kw">else</span> {
<span class="prelude-val">None</span>
}
}
<span class="doccomment">/// Generate binary representation</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">message</span><span class="op">&lt;</span><span class="ident">B</span>: <span class="ident">Into</span><span class="op">&lt;</span><span class="ident">Binary</span><span class="op">&gt;&gt;</span>(
<span class="ident">data</span>: <span class="ident">B</span>, <span class="ident">code</span>: <span class="ident">OpCode</span>, <span class="ident">finished</span>: <span class="ident">bool</span>, <span class="ident">genmask</span>: <span class="ident">bool</span>,
) <span class="op">-&gt;</span> <span class="ident">FramedMessage</span> {
<span class="kw">let</span> <span class="ident">payload</span> <span class="op">=</span> <span class="ident">data</span>.<span class="ident">into</span>();
<span class="kw">let</span> <span class="ident">one</span>: <span class="ident">u8</span> <span class="op">=</span> <span class="kw">if</span> <span class="ident">finished</span> {
<span class="number">0x80</span> <span class="op">|</span> <span class="ident">Into</span>::<span class="op">&lt;</span><span class="ident">u8</span><span class="op">&gt;</span>::<span class="ident">into</span>(<span class="ident">code</span>)
} <span class="kw">else</span> {
<span class="ident">code</span>.<span class="ident">into</span>()
};
<span class="kw">let</span> <span class="ident">payload_len</span> <span class="op">=</span> <span class="ident">payload</span>.<span class="ident">len</span>();
<span class="kw">let</span> (<span class="ident">two</span>, <span class="ident">p_len</span>) <span class="op">=</span> <span class="kw">if</span> <span class="ident">genmask</span> {
(<span class="number">0x80</span>, <span class="ident">payload_len</span> <span class="op">+</span> <span class="number">4</span>)
} <span class="kw">else</span> {
(<span class="number">0</span>, <span class="ident">payload_len</span>)
};
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buf</span> <span class="op">=</span> <span class="kw">if</span> <span class="ident">payload_len</span> <span class="op">&lt;</span> <span class="number">126</span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buf</span> <span class="op">=</span> <span class="ident">BytesMut</span>::<span class="ident">with_capacity</span>(<span class="ident">p_len</span> <span class="op">+</span> <span class="number">2</span>);
<span class="ident">buf</span>.<span class="ident">put_slice</span>(<span class="kw-2">&amp;</span>[<span class="ident">one</span>, <span class="ident">two</span> <span class="op">|</span> <span class="ident">payload_len</span> <span class="kw">as</span> <span class="ident">u8</span>]);
<span class="ident">buf</span>
} <span class="kw">else</span> <span class="kw">if</span> <span class="ident">payload_len</span> <span class="op">&lt;=</span> <span class="number">65_535</span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buf</span> <span class="op">=</span> <span class="ident">BytesMut</span>::<span class="ident">with_capacity</span>(<span class="ident">p_len</span> <span class="op">+</span> <span class="number">4</span>);
<span class="ident">buf</span>.<span class="ident">put_slice</span>(<span class="kw-2">&amp;</span>[<span class="ident">one</span>, <span class="ident">two</span> <span class="op">|</span> <span class="number">126</span>]);
<span class="ident">buf</span>.<span class="ident">put_u16_be</span>(<span class="ident">payload_len</span> <span class="kw">as</span> <span class="ident">u16</span>);
<span class="ident">buf</span>
} <span class="kw">else</span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buf</span> <span class="op">=</span> <span class="ident">BytesMut</span>::<span class="ident">with_capacity</span>(<span class="ident">p_len</span> <span class="op">+</span> <span class="number">10</span>);
<span class="ident">buf</span>.<span class="ident">put_slice</span>(<span class="kw-2">&amp;</span>[<span class="ident">one</span>, <span class="ident">two</span> <span class="op">|</span> <span class="number">127</span>]);
<span class="ident">buf</span>.<span class="ident">put_u64_be</span>(<span class="ident">payload_len</span> <span class="kw">as</span> <span class="ident">u64</span>);
<span class="ident">buf</span>
};
<span class="kw">let</span> <span class="ident">binary</span> <span class="op">=</span> <span class="kw">if</span> <span class="ident">genmask</span> {
<span class="kw">let</span> <span class="ident">mask</span> <span class="op">=</span> <span class="ident">rand</span>::<span class="ident">random</span>::<span class="op">&lt;</span><span class="ident">u32</span><span class="op">&gt;</span>();
<span class="ident">buf</span>.<span class="ident">put_u32_le</span>(<span class="ident">mask</span>);
<span class="ident">buf</span>.<span class="ident">extend_from_slice</span>(<span class="ident">payload</span>.<span class="ident">as_ref</span>());
<span class="kw">let</span> <span class="ident">pos</span> <span class="op">=</span> <span class="ident">buf</span>.<span class="ident">len</span>() <span class="op">-</span> <span class="ident">payload_len</span>;
<span class="ident">apply_mask</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">buf</span>[<span class="ident">pos</span>..], <span class="ident">mask</span>);
<span class="ident">buf</span>.<span class="ident">into</span>()
} <span class="kw">else</span> {
<span class="ident">buf</span>.<span class="ident">put_slice</span>(<span class="ident">payload</span>.<span class="ident">as_ref</span>());
<span class="ident">buf</span>.<span class="ident">into</span>()
};
<span class="ident">FramedMessage</span>(<span class="ident">binary</span>)
}
}
<span class="kw">impl</span> <span class="ident">Default</span> <span class="kw">for</span> <span class="ident">Frame</span> {
<span class="kw">fn</span> <span class="ident">default</span>() <span class="op">-&gt;</span> <span class="ident">Frame</span> {
<span class="ident">Frame</span> {
<span class="ident">finished</span>: <span class="bool-val">true</span>,
<span class="ident">opcode</span>: <span class="ident">OpCode</span>::<span class="ident">Close</span>,
<span class="ident">payload</span>: <span class="ident">Binary</span>::<span class="ident">from</span>(<span class="kw-2">&amp;</span><span class="string">b&quot;&quot;</span>[..]),
}
}
}
<span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Display</span> <span class="kw">for</span> <span class="ident">Frame</span> {
<span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-&gt;</span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
<span class="macro">write</span><span class="macro">!</span>(
<span class="ident">f</span>,
<span class="string">&quot;
&lt;FRAME&gt;
final: {}
opcode: {}
payload length: {}
payload: 0x{}
&lt;/FRAME&gt;&quot;</span>,
<span class="self">self</span>.<span class="ident">finished</span>,
<span class="self">self</span>.<span class="ident">opcode</span>,
<span class="self">self</span>.<span class="ident">payload</span>.<span class="ident">len</span>(),
<span class="self">self</span>.<span class="ident">payload</span>
.<span class="ident">as_ref</span>()
.<span class="ident">iter</span>()
.<span class="ident">map</span>(<span class="op">|</span><span class="ident">byte</span><span class="op">|</span> <span class="macro">format</span><span class="macro">!</span>(<span class="string">&quot;{:x}&quot;</span>, <span class="ident">byte</span>))
.<span class="ident">collect</span>::<span class="op">&lt;</span><span class="ident">String</span><span class="op">&gt;</span>()
)
}
}
<span class="doccomment">/// `WebSocket` message with framing.</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">FramedMessage</span>(<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="ident">Binary</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="kw-2">*</span>;
<span class="kw">use</span> <span class="ident">futures</span>::<span class="ident">stream</span>::<span class="ident">once</span>;
<span class="kw">fn</span> <span class="ident">is_none</span>(<span class="ident">frm</span>: <span class="kw-2">&amp;</span><span class="ident">Poll</span><span class="op">&lt;</span><span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">Frame</span><span class="op">&gt;</span>, <span class="ident">ProtocolError</span><span class="op">&gt;</span>) <span class="op">-&gt;</span> <span class="ident">bool</span> {
<span class="kw">match</span> <span class="kw-2">*</span><span class="ident">frm</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">=&gt;</span> <span class="bool-val">true</span>,
<span class="kw">_</span> <span class="op">=&gt;</span> <span class="bool-val">false</span>,
}
}
<span class="kw">fn</span> <span class="ident">extract</span>(<span class="ident">frm</span>: <span class="ident">Poll</span><span class="op">&lt;</span><span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">Frame</span><span class="op">&gt;</span>, <span class="ident">ProtocolError</span><span class="op">&gt;</span>) <span class="op">-&gt;</span> <span class="ident">Frame</span> {
<span class="kw">match</span> <span class="ident">frm</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">frame</span>))) <span class="op">=&gt;</span> <span class="ident">frame</span>,
<span class="kw">_</span> <span class="op">=&gt;</span> <span class="macro">unreachable</span><span class="macro">!</span>(<span class="string">&quot;error&quot;</span>),
}
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_parse</span>() {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buf</span> <span class="op">=</span> <span class="ident">PayloadBuffer</span>::<span class="ident">new</span>(<span class="ident">once</span>(<span class="prelude-val">Ok</span>(<span class="ident">BytesMut</span>::<span class="ident">from</span>(
<span class="kw-2">&amp;</span>[<span class="number">0b0000_0001u8</span>, <span class="number">0b0000_0001u8</span>][..],
).<span class="ident">freeze</span>())));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">is_none</span>(<span class="kw-2">&amp;</span><span class="ident">Frame</span>::<span class="ident">parse</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">buf</span>, <span class="bool-val">false</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="ident">BytesMut</span>::<span class="ident">from</span>(<span class="kw-2">&amp;</span>[<span class="number">0b0000_0001u8</span>, <span class="number">0b0000_0001u8</span>][..]);
<span class="ident">buf</span>.<span class="ident">extend</span>(<span class="string">b&quot;1&quot;</span>);
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buf</span> <span class="op">=</span> <span class="ident">PayloadBuffer</span>::<span class="ident">new</span>(<span class="ident">once</span>(<span class="prelude-val">Ok</span>(<span class="ident">buf</span>.<span class="ident">freeze</span>())));
<span class="kw">let</span> <span class="ident">frame</span> <span class="op">=</span> <span class="ident">extract</span>(<span class="ident">Frame</span>::<span class="ident">parse</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">buf</span>, <span class="bool-val">false</span>, <span class="number">1024</span>));
<span class="macro">assert</span><span class="macro">!</span>(<span class="op">!</span><span class="ident">frame</span>.<span class="ident">finished</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">frame</span>.<span class="ident">opcode</span>, <span class="ident">OpCode</span>::<span class="ident">Text</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">frame</span>.<span class="ident">payload</span>.<span class="ident">as_ref</span>(), <span class="kw-2">&amp;</span><span class="string">b&quot;1&quot;</span>[..]);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_parse_length0</span>() {
<span class="kw">let</span> <span class="ident">buf</span> <span class="op">=</span> <span class="ident">BytesMut</span>::<span class="ident">from</span>(<span class="kw-2">&amp;</span>[<span class="number">0b0000_0001u8</span>, <span class="number">0b0000_0000u8</span>][..]);
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buf</span> <span class="op">=</span> <span class="ident">PayloadBuffer</span>::<span class="ident">new</span>(<span class="ident">once</span>(<span class="prelude-val">Ok</span>(<span class="ident">buf</span>.<span class="ident">freeze</span>())));
<span class="kw">let</span> <span class="ident">frame</span> <span class="op">=</span> <span class="ident">extract</span>(<span class="ident">Frame</span>::<span class="ident">parse</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">buf</span>, <span class="bool-val">false</span>, <span class="number">1024</span>));
<span class="macro">assert</span><span class="macro">!</span>(<span class="op">!</span><span class="ident">frame</span>.<span class="ident">finished</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">frame</span>.<span class="ident">opcode</span>, <span class="ident">OpCode</span>::<span class="ident">Text</span>);
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">frame</span>.<span class="ident">payload</span>.<span class="ident">is_empty</span>());
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_parse_length2</span>() {
<span class="kw">let</span> <span class="ident">buf</span> <span class="op">=</span> <span class="ident">BytesMut</span>::<span class="ident">from</span>(<span class="kw-2">&amp;</span>[<span class="number">0b0000_0001u8</span>, <span class="number">126u8</span>][..]);
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buf</span> <span class="op">=</span> <span class="ident">PayloadBuffer</span>::<span class="ident">new</span>(<span class="ident">once</span>(<span class="prelude-val">Ok</span>(<span class="ident">buf</span>.<span class="ident">freeze</span>())));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">is_none</span>(<span class="kw-2">&amp;</span><span class="ident">Frame</span>::<span class="ident">parse</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">buf</span>, <span class="bool-val">false</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="ident">BytesMut</span>::<span class="ident">from</span>(<span class="kw-2">&amp;</span>[<span class="number">0b0000_0001u8</span>, <span class="number">126u8</span>][..]);
<span class="ident">buf</span>.<span class="ident">extend</span>(<span class="kw-2">&amp;</span>[<span class="number">0u8</span>, <span class="number">4u8</span>][..]);
<span class="ident">buf</span>.<span class="ident">extend</span>(<span class="string">b&quot;1234&quot;</span>);
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buf</span> <span class="op">=</span> <span class="ident">PayloadBuffer</span>::<span class="ident">new</span>(<span class="ident">once</span>(<span class="prelude-val">Ok</span>(<span class="ident">buf</span>.<span class="ident">freeze</span>())));
<span class="kw">let</span> <span class="ident">frame</span> <span class="op">=</span> <span class="ident">extract</span>(<span class="ident">Frame</span>::<span class="ident">parse</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">buf</span>, <span class="bool-val">false</span>, <span class="number">1024</span>));
<span class="macro">assert</span><span class="macro">!</span>(<span class="op">!</span><span class="ident">frame</span>.<span class="ident">finished</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">frame</span>.<span class="ident">opcode</span>, <span class="ident">OpCode</span>::<span class="ident">Text</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">frame</span>.<span class="ident">payload</span>.<span class="ident">as_ref</span>(), <span class="kw-2">&amp;</span><span class="string">b&quot;1234&quot;</span>[..]);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_parse_length4</span>() {
<span class="kw">let</span> <span class="ident">buf</span> <span class="op">=</span> <span class="ident">BytesMut</span>::<span class="ident">from</span>(<span class="kw-2">&amp;</span>[<span class="number">0b0000_0001u8</span>, <span class="number">127u8</span>][..]);
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buf</span> <span class="op">=</span> <span class="ident">PayloadBuffer</span>::<span class="ident">new</span>(<span class="ident">once</span>(<span class="prelude-val">Ok</span>(<span class="ident">buf</span>.<span class="ident">freeze</span>())));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">is_none</span>(<span class="kw-2">&amp;</span><span class="ident">Frame</span>::<span class="ident">parse</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">buf</span>, <span class="bool-val">false</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="ident">BytesMut</span>::<span class="ident">from</span>(<span class="kw-2">&amp;</span>[<span class="number">0b0000_0001u8</span>, <span class="number">127u8</span>][..]);
<span class="ident">buf</span>.<span class="ident">extend</span>(<span class="kw-2">&amp;</span>[<span class="number">0u8</span>, <span class="number">0u8</span>, <span class="number">0u8</span>, <span class="number">0u8</span>, <span class="number">0u8</span>, <span class="number">0u8</span>, <span class="number">0u8</span>, <span class="number">4u8</span>][..]);
<span class="ident">buf</span>.<span class="ident">extend</span>(<span class="string">b&quot;1234&quot;</span>);
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buf</span> <span class="op">=</span> <span class="ident">PayloadBuffer</span>::<span class="ident">new</span>(<span class="ident">once</span>(<span class="prelude-val">Ok</span>(<span class="ident">buf</span>.<span class="ident">freeze</span>())));
<span class="kw">let</span> <span class="ident">frame</span> <span class="op">=</span> <span class="ident">extract</span>(<span class="ident">Frame</span>::<span class="ident">parse</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">buf</span>, <span class="bool-val">false</span>, <span class="number">1024</span>));
<span class="macro">assert</span><span class="macro">!</span>(<span class="op">!</span><span class="ident">frame</span>.<span class="ident">finished</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">frame</span>.<span class="ident">opcode</span>, <span class="ident">OpCode</span>::<span class="ident">Text</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">frame</span>.<span class="ident">payload</span>.<span class="ident">as_ref</span>(), <span class="kw-2">&amp;</span><span class="string">b&quot;1234&quot;</span>[..]);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_parse_frame_mask</span>() {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buf</span> <span class="op">=</span> <span class="ident">BytesMut</span>::<span class="ident">from</span>(<span class="kw-2">&amp;</span>[<span class="number">0b0000_0001u8</span>, <span class="number">0b1000_0001u8</span>][..]);
<span class="ident">buf</span>.<span class="ident">extend</span>(<span class="string">b&quot;0001&quot;</span>);
<span class="ident">buf</span>.<span class="ident">extend</span>(<span class="string">b&quot;1&quot;</span>);
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buf</span> <span class="op">=</span> <span class="ident">PayloadBuffer</span>::<span class="ident">new</span>(<span class="ident">once</span>(<span class="prelude-val">Ok</span>(<span class="ident">buf</span>.<span class="ident">freeze</span>())));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">Frame</span>::<span class="ident">parse</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">buf</span>, <span class="bool-val">false</span>, <span class="number">1024</span>).<span class="ident">is_err</span>());
<span class="kw">let</span> <span class="ident">frame</span> <span class="op">=</span> <span class="ident">extract</span>(<span class="ident">Frame</span>::<span class="ident">parse</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">buf</span>, <span class="bool-val">true</span>, <span class="number">1024</span>));
<span class="macro">assert</span><span class="macro">!</span>(<span class="op">!</span><span class="ident">frame</span>.<span class="ident">finished</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">frame</span>.<span class="ident">opcode</span>, <span class="ident">OpCode</span>::<span class="ident">Text</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">frame</span>.<span class="ident">payload</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="number">1u8</span>].<span class="ident">into</span>());
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_parse_frame_no_mask</span>() {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buf</span> <span class="op">=</span> <span class="ident">BytesMut</span>::<span class="ident">from</span>(<span class="kw-2">&amp;</span>[<span class="number">0b0000_0001u8</span>, <span class="number">0b0000_0001u8</span>][..]);
<span class="ident">buf</span>.<span class="ident">extend</span>(<span class="kw-2">&amp;</span>[<span class="number">1u8</span>]);
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buf</span> <span class="op">=</span> <span class="ident">PayloadBuffer</span>::<span class="ident">new</span>(<span class="ident">once</span>(<span class="prelude-val">Ok</span>(<span class="ident">buf</span>.<span class="ident">freeze</span>())));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">Frame</span>::<span class="ident">parse</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">buf</span>, <span class="bool-val">true</span>, <span class="number">1024</span>).<span class="ident">is_err</span>());
<span class="kw">let</span> <span class="ident">frame</span> <span class="op">=</span> <span class="ident">extract</span>(<span class="ident">Frame</span>::<span class="ident">parse</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">buf</span>, <span class="bool-val">false</span>, <span class="number">1024</span>));
<span class="macro">assert</span><span class="macro">!</span>(<span class="op">!</span><span class="ident">frame</span>.<span class="ident">finished</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">frame</span>.<span class="ident">opcode</span>, <span class="ident">OpCode</span>::<span class="ident">Text</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">frame</span>.<span class="ident">payload</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="number">1u8</span>].<span class="ident">into</span>());
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_parse_frame_max_size</span>() {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buf</span> <span class="op">=</span> <span class="ident">BytesMut</span>::<span class="ident">from</span>(<span class="kw-2">&amp;</span>[<span class="number">0b0000_0001u8</span>, <span class="number">0b0000_0010u8</span>][..]);
<span class="ident">buf</span>.<span class="ident">extend</span>(<span class="kw-2">&amp;</span>[<span class="number">1u8</span>, <span class="number">1u8</span>]);
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buf</span> <span class="op">=</span> <span class="ident">PayloadBuffer</span>::<span class="ident">new</span>(<span class="ident">once</span>(<span class="prelude-val">Ok</span>(<span class="ident">buf</span>.<span class="ident">freeze</span>())));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">Frame</span>::<span class="ident">parse</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">buf</span>, <span class="bool-val">true</span>, <span class="number">1</span>).<span class="ident">is_err</span>());
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Err</span>(<span class="ident">ProtocolError</span>::<span class="ident">Overflow</span>) <span class="op">=</span> <span class="ident">Frame</span>::<span class="ident">parse</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">buf</span>, <span class="bool-val">false</span>, <span class="number">0</span>) {
} <span class="kw">else</span> {
<span class="macro">unreachable</span><span class="macro">!</span>(<span class="string">&quot;error&quot;</span>);
}
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_ping_frame</span>() {
<span class="kw">let</span> <span class="ident">frame</span> <span class="op">=</span> <span class="ident">Frame</span>::<span class="ident">message</span>(<span class="ident">Vec</span>::<span class="ident">from</span>(<span class="string">&quot;data&quot;</span>), <span class="ident">OpCode</span>::<span class="ident">Ping</span>, <span class="bool-val">true</span>, <span class="bool-val">false</span>);
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">v</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="number">137u8</span>, <span class="number">4u8</span>];
<span class="ident">v</span>.<span class="ident">extend</span>(<span class="string">b&quot;data&quot;</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">frame</span>.<span class="number">0</span>, <span class="ident">v</span>.<span class="ident">into</span>());
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_pong_frame</span>() {
<span class="kw">let</span> <span class="ident">frame</span> <span class="op">=</span> <span class="ident">Frame</span>::<span class="ident">message</span>(<span class="ident">Vec</span>::<span class="ident">from</span>(<span class="string">&quot;data&quot;</span>), <span class="ident">OpCode</span>::<span class="ident">Pong</span>, <span class="bool-val">true</span>, <span class="bool-val">false</span>);
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">v</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="number">138u8</span>, <span class="number">4u8</span>];
<span class="ident">v</span>.<span class="ident">extend</span>(<span class="string">b&quot;data&quot;</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">frame</span>.<span class="number">0</span>, <span class="ident">v</span>.<span class="ident">into</span>());
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_close_frame</span>() {
<span class="kw">let</span> <span class="ident">reason</span> <span class="op">=</span> (<span class="ident">CloseCode</span>::<span class="ident">Normal</span>, <span class="string">&quot;data&quot;</span>);
<span class="kw">let</span> <span class="ident">frame</span> <span class="op">=</span> <span class="ident">Frame</span>::<span class="ident">close</span>(<span class="prelude-val">Some</span>(<span class="ident">reason</span>.<span class="ident">into</span>()), <span class="bool-val">false</span>);
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">v</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="number">136u8</span>, <span class="number">6u8</span>, <span class="number">3u8</span>, <span class="number">232u8</span>];
<span class="ident">v</span>.<span class="ident">extend</span>(<span class="string">b&quot;data&quot;</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">frame</span>.<span class="number">0</span>, <span class="ident">v</span>.<span class="ident">into</span>());
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_empty_close_frame</span>() {
<span class="kw">let</span> <span class="ident">frame</span> <span class="op">=</span> <span class="ident">Frame</span>::<span class="ident">close</span>(<span class="prelude-val">None</span>, <span class="bool-val">false</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">frame</span>.<span class="number">0</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="number">0x88</span>, <span class="number">0x00</span>].<span class="ident">into</span>());
}
}
</pre>
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