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</div> </form> </nav> <section id='main' class="content source"><pre class="line-numbers"><span id="1"> 1</span> <span id="2"> 2</span> <span id="3"> 3</span> <span id="4"> 4</span> <span id="5"> 5</span> <span id="6"> 6</span> <span id="7"> 7</span> <span id="8"> 8</span> <span id="9"> 9</span> <span id="10"> 10</span> <span id="11"> 11</span> <span id="12"> 12</span> <span id="13"> 13</span> <span id="14"> 14</span> <span id="15"> 15</span> <span id="16"> 16</span> <span id="17"> 17</span> <span id="18"> 18</span> <span id="19"> 19</span> <span id="20"> 20</span> <span id="21"> 21</span> <span id="22"> 22</span> <span id="23"> 23</span> <span id="24"> 24</span> <span id="25"> 25</span> <span id="26"> 26</span> <span id="27"> 27</span> <span id="28"> 28</span> <span id="29"> 29</span> <span id="30"> 30</span> <span id="31"> 31</span> <span id="32"> 32</span> <span id="33"> 33</span> <span id="34"> 34</span> <span id="35"> 35</span> <span id="36"> 36</span> <span id="37"> 37</span> 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id="611">611</span> <span id="612">612</span> <span id="613">613</span> <span id="614">614</span> <span id="615">615</span> <span id="616">616</span> <span id="617">617</span> <span id="618">618</span> <span id="619">619</span> <span id="620">620</span> <span id="621">621</span> <span id="622">622</span> <span id="623">623</span> <span id="624">624</span> <span id="625">625</span> <span id="626">626</span> <span id="627">627</span> <span id="628">628</span> <span id="629">629</span> <span id="630">630</span> </pre><pre class='rust '> <span class='doccomment'>//! The module contains the implementation of the `HEADERS` frame and associated flags.</span> <span class='kw'>use</span> <span class='ident'>http</span>::<span class='ident'>StreamId</span>; <span class='kw'>use</span> <span class='ident'>http</span>::<span class='ident'>frame</span>::{ <span class='ident'>Flag</span>, <span class='ident'>Frame</span>, <span class='ident'>FrameHeader</span>, <span class='ident'>RawFrame</span>, <span class='ident'>pack_header</span>, <span class='ident'>parse_padded_payload</span>, }; <span class='doccomment'>/// An enum representing the flags that a `HeadersFrame` can have.</span> <span class='doccomment'>/// The integer representation associated to each variant is that flag's</span> <span class='doccomment'>/// bitmask.</span> <span class='doccomment'>///</span> <span class='doccomment'>/// HTTP/2 spec, section 6.2.</span> <span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>Clone</span>)]</span> <span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>PartialEq</span>)]</span> <span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>Debug</span>)]</span> <span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>Copy</span>)]</span> <span class='kw'>pub</span> <span class='kw'>enum</span> <span class='ident'>HeadersFlag</span> { <span class='ident'>EndStream</span> <span class='op'>=</span> <span class='number'>0x1</span>, <span class='ident'>EndHeaders</span> <span class='op'>=</span> <span class='number'>0x4</span>, <span class='ident'>Padded</span> <span class='op'>=</span> <span class='number'>0x8</span>, <span class='ident'>Priority</span> <span class='op'>=</span> <span class='number'>0x20</span>, } <span class='kw'>impl</span> <span class='ident'>Flag</span> <span class='kw'>for</span> <span class='ident'>HeadersFlag</span> { <span class='attribute'>#[<span class='ident'>inline</span>]</span> <span class='kw'>fn</span> <span class='ident'>bitmask</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>u8</span> { <span class='op'>*</span><span class='self'>self</span> <span class='kw'>as</span> <span class='ident'>u8</span> } } <span class='doccomment'>/// The struct represents the dependency information that can be attached to</span> <span class='doccomment'>/// a stream and sent within a HEADERS frame (one with the Priority flag set).</span> <span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>PartialEq</span>)]</span> <span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>Debug</span>)]</span> <span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>Clone</span>)]</span> <span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>StreamDependency</span> { <span class='doccomment'>/// The ID of the stream that a particular stream depends on</span> <span class='kw'>pub</span> <span class='ident'>stream_id</span>: <span class='ident'>StreamId</span>, <span class='doccomment'>/// The weight for the stream. The value exposed (and set) here is always</span> <span class='doccomment'>/// in the range [0, 255], instead of [1, 256] \(as defined in section 5.3.2.)</span> <span class='doccomment'>/// so that the value fits into a `u8`.</span> <span class='kw'>pub</span> <span class='ident'>weight</span>: <span class='ident'>u8</span>, <span class='doccomment'>/// A flag indicating whether the stream dependency is exclusive.</span> <span class='kw'>pub</span> <span class='ident'>is_exclusive</span>: <span class='ident'>bool</span>, } <span class='kw'>impl</span> <span class='ident'>StreamDependency</span> { <span class='doccomment'>/// Creates a new `StreamDependency` with the given stream ID, weight, and</span> <span class='doccomment'>/// exclusivity.</span> <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>new</span>(<span class='ident'>stream_id</span>: <span class='ident'>StreamId</span>, <span class='ident'>weight</span>: <span class='ident'>u8</span>, <span class='ident'>is_exclusive</span>: <span class='ident'>bool</span>) <span class='op'>-></span> <span class='ident'>StreamDependency</span> { <span class='ident'>StreamDependency</span> { <span class='ident'>stream_id</span>: <span class='ident'>stream_id</span>, <span class='ident'>weight</span>: <span class='ident'>weight</span>, <span class='ident'>is_exclusive</span>: <span class='ident'>is_exclusive</span>, } } <span class='doccomment'>/// Parses the first 5 bytes in the buffer as a `StreamDependency`.</span> <span class='doccomment'>/// (Each 5-byte sequence is always decodable into a stream dependency</span> <span class='doccomment'>/// structure).</span> <span class='doccomment'>///</span> <span class='doccomment'>/// # Panics</span> <span class='doccomment'>///</span> <span class='doccomment'>/// If the given buffer has less than 5 elements, the method will panic.</span> <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>parse</span>(<span class='ident'>buf</span>: <span class='kw-2'>&</span>[<span class='ident'>u8</span>]) <span class='op'>-></span> <span class='ident'>StreamDependency</span> { <span class='comment'>// The most significant bit of the first byte is the "E" bit indicating</span> <span class='comment'>// whether the dependency is exclusive.</span> <span class='kw'>let</span> <span class='ident'>is_exclusive</span> <span class='op'>=</span> <span class='ident'>buf</span>[<span class='number'>0</span>] <span class='kw-2'>&</span> <span class='number'>0x80</span> <span class='op'>!=</span> <span class='number'>0</span>; <span class='kw'>let</span> <span class='ident'>stream_id</span> <span class='op'>=</span> { <span class='comment'>// Parse the first 4 bytes into a u32...</span> <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>id</span> <span class='op'>=</span> <span class='macro'>unpack_octets_4</span><span class='macro'>!</span>(<span class='ident'>buf</span>, <span class='number'>0</span>, <span class='ident'>u32</span>); <span class='comment'>// ...clear the first bit since the stream id is only 31 bits.</span> <span class='ident'>id</span> <span class='op'>&=</span> <span class='op'>!</span>(<span class='number'>1</span> <span class='op'><<</span> <span class='number'>31</span>); <span class='ident'>id</span> }; <span class='ident'>StreamDependency</span> { <span class='ident'>stream_id</span>: <span class='ident'>stream_id</span>, <span class='ident'>weight</span>: <span class='ident'>buf</span>[<span class='number'>4</span>], <span class='ident'>is_exclusive</span>: <span class='ident'>is_exclusive</span>, } } <span class='doccomment'>/// Serializes the `StreamDependency` into a 5-byte buffer representing the</span> <span class='doccomment'>/// dependency description, as described in section 6.2. of the HTTP/2</span> <span class='doccomment'>/// spec:</span> <span class='doccomment'>///</span> <span class='doccomment'>/// ```notest</span> <span class='doccomment'>/// 0 1 2 3</span> <span class='doccomment'>/// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1</span> <span class='doccomment'>/// +-+-------------+-----------------------------------------------+</span> <span class='doccomment'>/// |E| Stream Dependency (31) |</span> <span class='doccomment'>/// +-+-------------+-----------------------------------------------+</span> <span class='doccomment'>/// | Weight (8) |</span> <span class='doccomment'>/// +-+-------------+-----------------------------------------------+</span> <span class='doccomment'>/// ```</span> <span class='doccomment'>///</span> <span class='doccomment'>/// Where "E" is set if the dependency is exclusive.</span> <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>serialize</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> [<span class='ident'>u8</span>; <span class='number'>5</span>] { <span class='kw'>let</span> <span class='ident'>e_bit</span> <span class='op'>=</span> <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>is_exclusive</span> { <span class='number'>1</span> <span class='op'><<</span> <span class='number'>7</span> } <span class='kw'>else</span> { <span class='number'>0</span> }; [ (((<span class='self'>self</span>.<span class='ident'>stream_id</span> <span class='op'>>></span> <span class='number'>24</span>) <span class='kw-2'>&</span> <span class='number'>0x000000FF</span>) <span class='kw'>as</span> <span class='ident'>u8</span>) <span class='op'>|</span> <span class='ident'>e_bit</span>, (((<span class='self'>self</span>.<span class='ident'>stream_id</span> <span class='op'>>></span> <span class='number'>16</span>) <span class='kw-2'>&</span> <span class='number'>0x000000FF</span>) <span class='kw'>as</span> <span class='ident'>u8</span>), (((<span class='self'>self</span>.<span class='ident'>stream_id</span> <span class='op'>>></span> <span class='number'>8</span>) <span class='kw-2'>&</span> <span class='number'>0x000000FF</span>) <span class='kw'>as</span> <span class='ident'>u8</span>), (((<span class='self'>self</span>.<span class='ident'>stream_id</span> <span class='op'>>></span> <span class='number'>0</span>) <span class='kw-2'>&</span> <span class='number'>0x000000FF</span>) <span class='kw'>as</span> <span class='ident'>u8</span>), <span class='self'>self</span>.<span class='ident'>weight</span>, ] } } <span class='doccomment'>/// A struct representing the HEADERS frames of HTTP/2, as defined in the</span> <span class='doccomment'>/// HTTP/2 spec, section 6.2.</span> <span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>PartialEq</span>)]</span> <span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>Debug</span>)]</span> <span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>Clone</span>)]</span> <span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>HeadersFrame</span> { <span class='doccomment'>/// The header fragment bytes stored within the frame.</span> <span class='kw'>pub</span> <span class='ident'>header_fragment</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span>, <span class='doccomment'>/// The ID of the stream with which this frame is associated</span> <span class='kw'>pub</span> <span class='ident'>stream_id</span>: <span class='ident'>StreamId</span>, <span class='doccomment'>/// The stream dependency information, if any.</span> <span class='kw'>pub</span> <span class='ident'>stream_dep</span>: <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>StreamDependency</span><span class='op'>></span>, <span class='doccomment'>/// The length of the padding, if any.</span> <span class='kw'>pub</span> <span class='ident'>padding_len</span>: <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span>, <span class='doccomment'>/// The set of flags for the frame, packed into a single byte.</span> <span class='ident'>flags</span>: <span class='ident'>u8</span>, } <span class='kw'>impl</span> <span class='ident'>HeadersFrame</span> { <span class='doccomment'>/// Creates a new `HeadersFrame` with the given header fragment and stream</span> <span class='doccomment'>/// ID. No padding, no stream dependency, and no flags are set.</span> <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>new</span>(<span class='ident'>fragment</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span>, <span class='ident'>stream_id</span>: <span class='ident'>StreamId</span>) <span class='op'>-></span> <span class='ident'>HeadersFrame</span> { <span class='ident'>HeadersFrame</span> { <span class='ident'>header_fragment</span>: <span class='ident'>fragment</span>, <span class='ident'>stream_id</span>: <span class='ident'>stream_id</span>, <span class='ident'>stream_dep</span>: <span class='prelude-val'>None</span>, <span class='ident'>padding_len</span>: <span class='prelude-val'>None</span>, <span class='ident'>flags</span>: <span class='number'>0</span>, } } <span class='doccomment'>/// Creates a new `HeadersFrame` with the given header fragment, stream ID</span> <span class='doccomment'>/// and stream dependency information. No padding and no flags are set.</span> <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>with_dependency</span>( <span class='ident'>fragment</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span>, <span class='ident'>stream_id</span>: <span class='ident'>StreamId</span>, <span class='ident'>stream_dep</span>: <span class='ident'>StreamDependency</span>) <span class='op'>-></span> <span class='ident'>HeadersFrame</span> { <span class='ident'>HeadersFrame</span> { <span class='ident'>header_fragment</span>: <span class='ident'>fragment</span>, <span class='ident'>stream_id</span>: <span class='ident'>stream_id</span>, <span class='ident'>stream_dep</span>: <span class='prelude-val'>Some</span>(<span class='ident'>stream_dep</span>), <span class='ident'>padding_len</span>: <span class='prelude-val'>None</span>, <span class='ident'>flags</span>: <span class='ident'>HeadersFlag</span>::<span class='ident'>Priority</span>.<span class='ident'>bitmask</span>(), } } <span class='doccomment'>/// Returns whether this frame ends the headers. If not, there MUST be a</span> <span class='doccomment'>/// number of follow up CONTINUATION frames that send the rest of the</span> <span class='doccomment'>/// header data.</span> <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>is_headers_end</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>bool</span> { <span class='self'>self</span>.<span class='ident'>is_set</span>(<span class='ident'>HeadersFlag</span>::<span class='ident'>EndHeaders</span>) } <span class='doccomment'>/// Returns whther this frame ends the stream it is associated with.</span> <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>is_end_of_stream</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>bool</span> { <span class='self'>self</span>.<span class='ident'>is_set</span>(<span class='ident'>HeadersFlag</span>::<span class='ident'>EndStream</span>) } <span class='doccomment'>/// Sets the padding length for the frame, as well as the corresponding</span> <span class='doccomment'>/// Padded flag.</span> <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>set_padding</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>padding_len</span>: <span class='ident'>u8</span>) { <span class='self'>self</span>.<span class='ident'>padding_len</span> <span class='op'>=</span> <span class='prelude-val'>Some</span>(<span class='ident'>padding_len</span>); <span class='self'>self</span>.<span class='ident'>set_flag</span>(<span class='ident'>HeadersFlag</span>::<span class='ident'>Padded</span>); } <span class='doccomment'>/// Returns the length of the payload of the current frame, including any</span> <span class='doccomment'>/// possible padding in the number of bytes.</span> <span class='kw'>fn</span> <span class='ident'>payload_len</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>u32</span> { <span class='kw'>let</span> <span class='ident'>padding</span> <span class='op'>=</span> <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>is_set</span>(<span class='ident'>HeadersFlag</span>::<span class='ident'>Padded</span>) { <span class='number'>1</span> <span class='op'>+</span> <span class='self'>self</span>.<span class='ident'>padding_len</span>.<span class='ident'>unwrap_or</span>(<span class='number'>0</span>) <span class='kw'>as</span> <span class='ident'>u32</span> } <span class='kw'>else</span> { <span class='number'>0</span> }; <span class='kw'>let</span> <span class='ident'>priority</span> <span class='op'>=</span> <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>is_set</span>(<span class='ident'>HeadersFlag</span>::<span class='ident'>Priority</span>) { <span class='number'>5</span> } <span class='kw'>else</span> { <span class='number'>0</span> }; <span class='self'>self</span>.<span class='ident'>header_fragment</span>.<span class='ident'>len</span>() <span class='kw'>as</span> <span class='ident'>u32</span> <span class='op'>+</span> <span class='ident'>priority</span> <span class='op'>+</span> <span class='ident'>padding</span> } } <span class='kw'>impl</span> <span class='ident'>Frame</span> <span class='kw'>for</span> <span class='ident'>HeadersFrame</span> { <span class='doccomment'>/// The type that represents the flags that the particular `Frame` can take.</span> <span class='doccomment'>/// This makes sure that only valid `Flag`s are used with each `Frame`.</span> <span class='kw'>type</span> <span class='ident'>FlagType</span> <span class='op'>=</span> <span class='ident'>HeadersFlag</span>; <span class='doccomment'>/// Creates a new `HeadersFrame` with the given `RawFrame` (i.e. header and</span> <span class='doccomment'>/// payload), if possible.</span> <span class='doccomment'>///</span> <span class='doccomment'>/// # Returns</span> <span class='doccomment'>///</span> <span class='doccomment'>/// `None` if a valid `HeadersFrame` cannot be constructed from the given</span> <span class='doccomment'>/// `RawFrame`. The stream ID *must not* be 0.</span> <span class='doccomment'>///</span> <span class='doccomment'>/// Otherwise, returns a newly constructed `HeadersFrame`.</span> <span class='kw'>fn</span> <span class='ident'>from_raw</span>(<span class='ident'>raw_frame</span>: <span class='ident'>RawFrame</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>HeadersFrame</span><span class='op'>></span> { <span class='comment'>// Unpack the header</span> <span class='kw'>let</span> (<span class='ident'>len</span>, <span class='ident'>frame_type</span>, <span class='ident'>flags</span>, <span class='ident'>stream_id</span>) <span class='op'>=</span> <span class='ident'>raw_frame</span>.<span class='ident'>header</span>(); <span class='comment'>// Check that the frame type is correct for this frame implementation</span> <span class='kw'>if</span> <span class='ident'>frame_type</span> <span class='op'>!=</span> <span class='number'>0x1</span> { <span class='kw'>return</span> <span class='prelude-val'>None</span>; } <span class='comment'>// Check that the length given in the header matches the payload</span> <span class='comment'>// length; if not, something went wrong and we do not consider this a</span> <span class='comment'>// valid frame.</span> <span class='kw'>if</span> (<span class='ident'>len</span> <span class='kw'>as</span> <span class='ident'>usize</span>) <span class='op'>!=</span> <span class='ident'>raw_frame</span>.<span class='ident'>payload</span>().<span class='ident'>len</span>() { <span class='kw'>return</span> <span class='prelude-val'>None</span>; } <span class='comment'>// Check that the HEADERS frame is not associated to stream 0</span> <span class='kw'>if</span> <span class='ident'>stream_id</span> <span class='op'>==</span> <span class='number'>0</span> { <span class='kw'>return</span> <span class='prelude-val'>None</span>; } <span class='comment'>// First, we get a slice containing the actual payload, depending on if</span> <span class='comment'>// the frame is padded.</span> <span class='kw'>let</span> <span class='ident'>padded</span> <span class='op'>=</span> (<span class='ident'>flags</span> <span class='kw-2'>&</span> <span class='ident'>HeadersFlag</span>::<span class='ident'>Padded</span>.<span class='ident'>bitmask</span>()) <span class='op'>!=</span> <span class='number'>0</span>; <span class='kw'>let</span> (<span class='ident'>actual</span>, <span class='ident'>pad_len</span>) <span class='op'>=</span> <span class='kw'>if</span> <span class='ident'>padded</span> { <span class='kw'>match</span> <span class='ident'>parse_padded_payload</span>(<span class='kw-2'>&</span><span class='ident'>raw_frame</span>.<span class='ident'>payload</span>()) { <span class='prelude-val'>Some</span>((<span class='ident'>data</span>, <span class='ident'>pad_len</span>)) <span class='op'>=></span> (<span class='ident'>data</span>, <span class='prelude-val'>Some</span>(<span class='ident'>pad_len</span>)), <span class='prelude-val'>None</span> <span class='op'>=></span> <span class='kw'>return</span> <span class='prelude-val'>None</span>, } } <span class='kw'>else</span> { (<span class='ident'>raw_frame</span>.<span class='ident'>payload</span>(), <span class='prelude-val'>None</span>) }; <span class='comment'>// From the actual payload we extract the stream dependency info, if</span> <span class='comment'>// the appropriate flag is set.</span> <span class='kw'>let</span> <span class='ident'>priority</span> <span class='op'>=</span> (<span class='ident'>flags</span> <span class='kw-2'>&</span> <span class='ident'>HeadersFlag</span>::<span class='ident'>Priority</span>.<span class='ident'>bitmask</span>()) <span class='op'>!=</span> <span class='number'>0</span>; <span class='kw'>let</span> (<span class='ident'>data</span>, <span class='ident'>stream_dep</span>) <span class='op'>=</span> <span class='kw'>if</span> <span class='ident'>priority</span> { (<span class='kw-2'>&</span><span class='ident'>actual</span>[<span class='number'>5</span>..], <span class='prelude-val'>Some</span>(<span class='ident'>StreamDependency</span>::<span class='ident'>parse</span>(<span class='kw-2'>&</span><span class='ident'>actual</span>[..<span class='number'>5</span>]))) } <span class='kw'>else</span> { (<span class='ident'>actual</span>, <span class='prelude-val'>None</span>) }; <span class='prelude-val'>Some</span>(<span class='ident'>HeadersFrame</span> { <span class='ident'>header_fragment</span>: <span class='ident'>data</span>.<span class='ident'>to_vec</span>(), <span class='ident'>stream_id</span>: <span class='ident'>stream_id</span>, <span class='ident'>stream_dep</span>: <span class='ident'>stream_dep</span>, <span class='ident'>padding_len</span>: <span class='ident'>pad_len</span>, <span class='ident'>flags</span>: <span class='ident'>flags</span>, }) } <span class='doccomment'>/// Tests if the given flag is set for the frame.</span> <span class='kw'>fn</span> <span class='ident'>is_set</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>flag</span>: <span class='ident'>HeadersFlag</span>) <span class='op'>-></span> <span class='ident'>bool</span> { (<span class='self'>self</span>.<span class='ident'>flags</span> <span class='kw-2'>&</span> <span class='ident'>flag</span>.<span class='ident'>bitmask</span>()) <span class='op'>!=</span> <span class='number'>0</span> } <span class='doccomment'>/// Returns the `StreamId` of the stream to which the frame is associated.</span> <span class='doccomment'>///</span> <span class='doccomment'>/// A `SettingsFrame` always has to be associated to stream `0`.</span> <span class='kw'>fn</span> <span class='ident'>get_stream_id</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>StreamId</span> { <span class='self'>self</span>.<span class='ident'>stream_id</span> } <span class='doccomment'>/// Returns a `FrameHeader` based on the current state of the `Frame`.</span> <span class='kw'>fn</span> <span class='ident'>get_header</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>FrameHeader</span> { (<span class='self'>self</span>.<span class='ident'>payload_len</span>(), <span class='number'>0x1</span>, <span class='self'>self</span>.<span class='ident'>flags</span>, <span class='self'>self</span>.<span class='ident'>stream_id</span>) } <span class='doccomment'>/// Sets the given flag for the frame.</span> <span class='kw'>fn</span> <span class='ident'>set_flag</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>flag</span>: <span class='ident'>HeadersFlag</span>) { <span class='self'>self</span>.<span class='ident'>flags</span> <span class='op'>|=</span> <span class='ident'>flag</span>.<span class='ident'>bitmask</span>(); } <span class='doccomment'>/// Returns a `Vec` with the serialized representation of the frame.</span> <span class='doccomment'>///</span> <span class='doccomment'>/// # Panics</span> <span class='doccomment'>///</span> <span class='doccomment'>/// If the `HeadersFlag::Priority` flag was set, but no stream dependency</span> <span class='doccomment'>/// information is given (i.e. `stream_dep` is `None`).</span> <span class='kw'>fn</span> <span class='ident'>serialize</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span> { <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>buf</span> <span class='op'>=</span> <span class='ident'>Vec</span>::<span class='ident'>with_capacity</span>(<span class='self'>self</span>.<span class='ident'>payload_len</span>() <span class='kw'>as</span> <span class='ident'>usize</span>); <span class='comment'>// First the header...</span> <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&</span><span class='self'>self</span>.<span class='ident'>get_header</span>()).<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>()); <span class='comment'>// Now the length of the padding, if any.</span> <span class='kw'>let</span> <span class='ident'>padded</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>is_set</span>(<span class='ident'>HeadersFlag</span>::<span class='ident'>Padded</span>); <span class='kw'>if</span> <span class='ident'>padded</span> { <span class='ident'>buf</span>.<span class='ident'>push</span>(<span class='self'>self</span>.<span class='ident'>padding_len</span>.<span class='ident'>unwrap_or</span>(<span class='number'>0</span>)); } <span class='comment'>// The stream dependency fields follow, if the priority flag is set</span> <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>is_set</span>(<span class='ident'>HeadersFlag</span>::<span class='ident'>Priority</span>) { <span class='kw'>let</span> <span class='ident'>dep_buf</span> <span class='op'>=</span> <span class='kw'>match</span> <span class='self'>self</span>.<span class='ident'>stream_dep</span> { <span class='prelude-val'>Some</span>(<span class='kw-2'>ref</span> <span class='ident'>dep</span>) <span class='op'>=></span> <span class='ident'>dep</span>.<span class='ident'>serialize</span>(), <span class='prelude-val'>None</span> <span class='op'>=></span> <span class='macro'>panic</span><span class='macro'>!</span>(<span class='string'>"Priority flag set, but no dependency information given"</span>), }; <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>dep_buf</span>.<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>()); } <span class='comment'>// Now the actual headers fragment</span> <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='self'>self</span>.<span class='ident'>header_fragment</span>.<span class='ident'>clone</span>().<span class='ident'>into_iter</span>()); <span class='comment'>// Finally, add the trailing padding, if required</span> <span class='kw'>if</span> <span class='ident'>padded</span> { <span class='kw'>for</span> _ <span class='kw'>in</span> <span class='number'>0</span>..<span class='self'>self</span>.<span class='ident'>padding_len</span>.<span class='ident'>unwrap_or</span>(<span class='number'>0</span>) { <span class='ident'>buf</span>.<span class='ident'>push</span>(<span class='number'>0</span>); } } <span class='ident'>buf</span> } } <span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>test</span>)]</span> <span class='kw'>mod</span> <span class='ident'>tests</span> { <span class='kw'>use</span> <span class='kw'>super</span>::{<span class='ident'>HeadersFrame</span>, <span class='ident'>HeadersFlag</span>, <span class='ident'>StreamDependency</span>}; <span class='kw'>use</span> <span class='ident'>http</span>::<span class='ident'>frame</span>::<span class='ident'>tests</span>::{<span class='ident'>build_test_frame</span>, <span class='ident'>build_padded_frame_payload</span>}; <span class='kw'>use</span> <span class='ident'>http</span>::<span class='ident'>frame</span>::{<span class='ident'>pack_header</span>, <span class='ident'>Frame</span>, <span class='ident'>RawFrame</span>}; <span class='doccomment'>/// Tests that a stream dependency structure can be correctly parsed by the</span> <span class='doccomment'>/// `StreamDependency::parse` method.</span> <span class='attribute'>#[<span class='ident'>test</span>]</span> <span class='kw'>fn</span> <span class='ident'>test_parse_stream_dependency</span>() { { <span class='kw'>let</span> <span class='ident'>buf</span> <span class='op'>=</span> [<span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span>, <span class='number'>5</span>]; <span class='kw'>let</span> <span class='ident'>dep</span> <span class='op'>=</span> <span class='ident'>StreamDependency</span>::<span class='ident'>parse</span>(<span class='kw-2'>&</span><span class='ident'>buf</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>dep</span>.<span class='ident'>stream_id</span>, <span class='number'>1</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>dep</span>.<span class='ident'>weight</span>, <span class='number'>5</span>); <span class='comment'>// This one was not exclusive!</span> <span class='macro'>assert</span><span class='macro'>!</span>(<span class='op'>!</span><span class='ident'>dep</span>.<span class='ident'>is_exclusive</span>) } { <span class='comment'>// Most significant bit set => is exclusive!</span> <span class='kw'>let</span> <span class='ident'>buf</span> <span class='op'>=</span> [<span class='number'>128</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span>, <span class='number'>5</span>]; <span class='kw'>let</span> <span class='ident'>dep</span> <span class='op'>=</span> <span class='ident'>StreamDependency</span>::<span class='ident'>parse</span>(<span class='kw-2'>&</span><span class='ident'>buf</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>dep</span>.<span class='ident'>stream_id</span>, <span class='number'>1</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>dep</span>.<span class='ident'>weight</span>, <span class='number'>5</span>); <span class='comment'>// This one was indeed exclusive!</span> <span class='macro'>assert</span><span class='macro'>!</span>(<span class='ident'>dep</span>.<span class='ident'>is_exclusive</span>) } { <span class='comment'>// Most significant bit set => is exclusive!</span> <span class='kw'>let</span> <span class='ident'>buf</span> <span class='op'>=</span> [<span class='number'>255</span>, <span class='number'>255</span>, <span class='number'>255</span>, <span class='number'>255</span>, <span class='number'>5</span>]; <span class='kw'>let</span> <span class='ident'>dep</span> <span class='op'>=</span> <span class='ident'>StreamDependency</span>::<span class='ident'>parse</span>(<span class='kw-2'>&</span><span class='ident'>buf</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>dep</span>.<span class='ident'>stream_id</span>, (<span class='number'>1</span> <span class='op'><<</span> <span class='number'>31</span>) <span class='op'>-</span> <span class='number'>1</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>dep</span>.<span class='ident'>weight</span>, <span class='number'>5</span>); <span class='comment'>// This one was indeed exclusive!</span> <span class='macro'>assert</span><span class='macro'>!</span>(<span class='ident'>dep</span>.<span class='ident'>is_exclusive</span>); } { <span class='kw'>let</span> <span class='ident'>buf</span> <span class='op'>=</span> [<span class='number'>127</span>, <span class='number'>255</span>, <span class='number'>255</span>, <span class='number'>255</span>, <span class='number'>5</span>]; <span class='kw'>let</span> <span class='ident'>dep</span> <span class='op'>=</span> <span class='ident'>StreamDependency</span>::<span class='ident'>parse</span>(<span class='kw-2'>&</span><span class='ident'>buf</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>dep</span>.<span class='ident'>stream_id</span>, (<span class='number'>1</span> <span class='op'><<</span> <span class='number'>31</span>) <span class='op'>-</span> <span class='number'>1</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>dep</span>.<span class='ident'>weight</span>, <span class='number'>5</span>); <span class='comment'>// This one was not exclusive!</span> <span class='macro'>assert</span><span class='macro'>!</span>(<span class='op'>!</span><span class='ident'>dep</span>.<span class='ident'>is_exclusive</span>); } } <span class='doccomment'>/// Tests that a stream dependency structure can be correctly serialized by</span> <span class='doccomment'>/// the `StreamDependency::serialize` method.</span> <span class='attribute'>#[<span class='ident'>test</span>]</span> <span class='kw'>fn</span> <span class='ident'>test_serialize_stream_dependency</span>() { { <span class='kw'>let</span> <span class='ident'>buf</span> <span class='op'>=</span> [<span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span>, <span class='number'>5</span>]; <span class='kw'>let</span> <span class='ident'>dep</span> <span class='op'>=</span> <span class='ident'>StreamDependency</span>::<span class='ident'>new</span>(<span class='number'>1</span>, <span class='number'>5</span>, <span class='bool-val'>false</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>buf</span>, <span class='ident'>dep</span>.<span class='ident'>serialize</span>()); } { <span class='comment'>// Most significant bit set => is exclusive!</span> <span class='kw'>let</span> <span class='ident'>buf</span> <span class='op'>=</span> [<span class='number'>128</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span>, <span class='number'>5</span>]; <span class='kw'>let</span> <span class='ident'>dep</span> <span class='op'>=</span> <span class='ident'>StreamDependency</span>::<span class='ident'>new</span>(<span class='number'>1</span>, <span class='number'>5</span>, <span class='bool-val'>true</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>buf</span>, <span class='ident'>dep</span>.<span class='ident'>serialize</span>()); } { <span class='comment'>// Most significant bit set => is exclusive!</span> <span class='kw'>let</span> <span class='ident'>buf</span> <span class='op'>=</span> [<span class='number'>255</span>, <span class='number'>255</span>, <span class='number'>255</span>, <span class='number'>255</span>, <span class='number'>5</span>]; <span class='kw'>let</span> <span class='ident'>dep</span> <span class='op'>=</span> <span class='ident'>StreamDependency</span>::<span class='ident'>new</span>((<span class='number'>1</span> <span class='op'><<</span> <span class='number'>31</span>) <span class='op'>-</span> <span class='number'>1</span>, <span class='number'>5</span>, <span class='bool-val'>true</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>buf</span>, <span class='ident'>dep</span>.<span class='ident'>serialize</span>()); } { <span class='kw'>let</span> <span class='ident'>buf</span> <span class='op'>=</span> [<span class='number'>127</span>, <span class='number'>255</span>, <span class='number'>255</span>, <span class='number'>255</span>, <span class='number'>5</span>]; <span class='kw'>let</span> <span class='ident'>dep</span> <span class='op'>=</span> <span class='ident'>StreamDependency</span>::<span class='ident'>new</span>((<span class='number'>1</span> <span class='op'><<</span> <span class='number'>31</span>) <span class='op'>-</span> <span class='number'>1</span>, <span class='number'>5</span>, <span class='bool-val'>false</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>buf</span>, <span class='ident'>dep</span>.<span class='ident'>serialize</span>()); } } <span class='doccomment'>/// Tests that a simple HEADERS frame is correctly parsed. The frame does</span> <span class='doccomment'>/// not contain any padding nor priority information.</span> <span class='attribute'>#[<span class='ident'>test</span>]</span> <span class='kw'>fn</span> <span class='ident'>test_headers_frame_parse_simple</span>() { <span class='kw'>let</span> <span class='ident'>data</span> <span class='op'>=</span> <span class='string'>b"123"</span>; <span class='kw'>let</span> <span class='ident'>payload</span> <span class='op'>=</span> <span class='ident'>data</span>.<span class='ident'>to_vec</span>(); <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> (<span class='ident'>payload</span>.<span class='ident'>len</span>() <span class='kw'>as</span> <span class='ident'>u32</span>, <span class='number'>0x1</span>, <span class='number'>0</span>, <span class='number'>1</span>); <span class='kw'>let</span> <span class='ident'>frame</span> <span class='op'>=</span> <span class='ident'>build_test_frame</span>::<span class='op'><</span><span class='ident'>HeadersFrame</span><span class='op'>></span>(<span class='kw-2'>&</span><span class='ident'>header</span>, <span class='kw-2'>&</span><span class='ident'>payload</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>frame</span>.<span class='ident'>header_fragment</span>, <span class='ident'>data</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>frame</span>.<span class='ident'>flags</span>, <span class='number'>0</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>frame</span>.<span class='ident'>get_stream_id</span>(), <span class='number'>1</span>); <span class='macro'>assert</span><span class='macro'>!</span>(<span class='ident'>frame</span>.<span class='ident'>stream_dep</span>.<span class='ident'>is_none</span>()); <span class='macro'>assert</span><span class='macro'>!</span>(<span class='ident'>frame</span>.<span class='ident'>padding_len</span>.<span class='ident'>is_none</span>()); } <span class='doccomment'>/// Tests that a HEADERS frame with padding is correctly parsed.</span> <span class='attribute'>#[<span class='ident'>test</span>]</span> <span class='kw'>fn</span> <span class='ident'>test_headers_frame_parse_with_padding</span>() { <span class='kw'>let</span> <span class='ident'>data</span> <span class='op'>=</span> <span class='string'>b"123"</span>; <span class='kw'>let</span> <span class='ident'>payload</span> <span class='op'>=</span> <span class='ident'>build_padded_frame_payload</span>(<span class='ident'>data</span>, <span class='number'>6</span>); <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> (<span class='ident'>payload</span>.<span class='ident'>len</span>() <span class='kw'>as</span> <span class='ident'>u32</span>, <span class='number'>0x1</span>, <span class='number'>0x08</span>, <span class='number'>1</span>); <span class='kw'>let</span> <span class='ident'>frame</span> <span class='op'>=</span> <span class='ident'>build_test_frame</span>::<span class='op'><</span><span class='ident'>HeadersFrame</span><span class='op'>></span>(<span class='kw-2'>&</span><span class='ident'>header</span>, <span class='kw-2'>&</span><span class='ident'>payload</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>frame</span>.<span class='ident'>header_fragment</span>, <span class='ident'>data</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>frame</span>.<span class='ident'>flags</span>, <span class='number'>8</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>frame</span>.<span class='ident'>get_stream_id</span>(), <span class='number'>1</span>); <span class='macro'>assert</span><span class='macro'>!</span>(<span class='ident'>frame</span>.<span class='ident'>stream_dep</span>.<span class='ident'>is_none</span>()); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>frame</span>.<span class='ident'>padding_len</span>.<span class='ident'>unwrap</span>(), <span class='number'>6</span>); } <span class='doccomment'>/// Tests that a HEADERS frame with the priority flag (and necessary fields)</span> <span class='doccomment'>/// is correctly parsed.</span> <span class='attribute'>#[<span class='ident'>test</span>]</span> <span class='kw'>fn</span> <span class='ident'>test_headers_frame_parse_with_priority</span>() { <span class='kw'>let</span> <span class='ident'>data</span> <span class='op'>=</span> <span class='string'>b"123"</span>; <span class='kw'>let</span> <span class='ident'>dep</span> <span class='op'>=</span> <span class='ident'>StreamDependency</span>::<span class='ident'>new</span>(<span class='number'>0</span>, <span class='number'>5</span>, <span class='bool-val'>true</span>); <span class='kw'>let</span> <span class='ident'>payload</span> <span class='op'>=</span> { <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>buf</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span> <span class='op'>=</span> <span class='ident'>Vec</span>::<span class='ident'>new</span>(); <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>dep</span>.<span class='ident'>serialize</span>().<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>()); <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>data</span>.<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>()); <span class='ident'>buf</span> }; <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> (<span class='ident'>payload</span>.<span class='ident'>len</span>() <span class='kw'>as</span> <span class='ident'>u32</span>, <span class='number'>0x1</span>, <span class='number'>0x20</span>, <span class='number'>1</span>); <span class='kw'>let</span> <span class='ident'>frame</span> <span class='op'>=</span> <span class='ident'>build_test_frame</span>::<span class='op'><</span><span class='ident'>HeadersFrame</span><span class='op'>></span>(<span class='kw-2'>&</span><span class='ident'>header</span>, <span class='kw-2'>&</span><span class='ident'>payload</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>frame</span>.<span class='ident'>header_fragment</span>, <span class='ident'>data</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>frame</span>.<span class='ident'>flags</span>, <span class='number'>0x20</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>frame</span>.<span class='ident'>get_stream_id</span>(), <span class='number'>1</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>frame</span>.<span class='ident'>stream_dep</span>.<span class='ident'>unwrap</span>(), <span class='ident'>dep</span>); <span class='macro'>assert</span><span class='macro'>!</span>(<span class='ident'>frame</span>.<span class='ident'>padding_len</span>.<span class='ident'>is_none</span>()); } <span class='doccomment'>/// Tests that a HEADERS frame with both padding and priority gets</span> <span class='doccomment'>/// correctly parsed.</span> <span class='attribute'>#[<span class='ident'>test</span>]</span> <span class='kw'>fn</span> <span class='ident'>test_headers_frame_parse_padding_and_priority</span>() { <span class='kw'>let</span> <span class='ident'>data</span> <span class='op'>=</span> <span class='string'>b"123"</span>; <span class='kw'>let</span> <span class='ident'>dep</span> <span class='op'>=</span> <span class='ident'>StreamDependency</span>::<span class='ident'>new</span>(<span class='number'>0</span>, <span class='number'>5</span>, <span class='bool-val'>true</span>); <span class='kw'>let</span> <span class='ident'>full</span> <span class='op'>=</span> { <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>buf</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span> <span class='op'>=</span> <span class='ident'>Vec</span>::<span class='ident'>new</span>(); <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>dep</span>.<span class='ident'>serialize</span>().<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>()); <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>data</span>.<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>()); <span class='ident'>buf</span> }; <span class='kw'>let</span> <span class='ident'>payload</span> <span class='op'>=</span> <span class='ident'>build_padded_frame_payload</span>(<span class='kw-2'>&</span><span class='ident'>full</span>, <span class='number'>4</span>); <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> (<span class='ident'>payload</span>.<span class='ident'>len</span>() <span class='kw'>as</span> <span class='ident'>u32</span>, <span class='number'>0x1</span>, <span class='number'>0x20</span> <span class='op'>|</span> <span class='number'>0x8</span>, <span class='number'>1</span>); <span class='kw'>let</span> <span class='ident'>frame</span> <span class='op'>=</span> <span class='ident'>build_test_frame</span>::<span class='op'><</span><span class='ident'>HeadersFrame</span><span class='op'>></span>(<span class='kw-2'>&</span><span class='ident'>header</span>, <span class='kw-2'>&</span><span class='ident'>payload</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>frame</span>.<span class='ident'>header_fragment</span>, <span class='ident'>data</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>frame</span>.<span class='ident'>flags</span>, <span class='number'>0x20</span> <span class='op'>|</span> <span class='number'>0x8</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>frame</span>.<span class='ident'>get_stream_id</span>(), <span class='number'>1</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>frame</span>.<span class='ident'>stream_dep</span>.<span class='ident'>unwrap</span>(), <span class='ident'>dep</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>frame</span>.<span class='ident'>padding_len</span>.<span class='ident'>unwrap</span>(), <span class='number'>4</span>); } <span class='doccomment'>/// Tests that a HEADERS with stream ID 0 is considered invalid.</span> <span class='attribute'>#[<span class='ident'>test</span>]</span> <span class='kw'>fn</span> <span class='ident'>test_headers_frame_parse_invalid_stream_id</span>() { <span class='kw'>let</span> <span class='ident'>data</span> <span class='op'>=</span> <span class='string'>b"123"</span>; <span class='kw'>let</span> <span class='ident'>payload</span> <span class='op'>=</span> <span class='ident'>data</span>.<span class='ident'>to_vec</span>(); <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> (<span class='ident'>payload</span>.<span class='ident'>len</span>() <span class='kw'>as</span> <span class='ident'>u32</span>, <span class='number'>0x1</span>, <span class='number'>0</span>, <span class='number'>0</span>); <span class='kw'>let</span> <span class='ident'>frame</span>: <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>HeadersFrame</span><span class='op'>></span> <span class='op'>=</span> <span class='ident'>Frame</span>::<span class='ident'>from_raw</span>( <span class='ident'>RawFrame</span>::<span class='ident'>with_payload</span>(<span class='ident'>header</span>, <span class='ident'>payload</span>)); <span class='macro'>assert</span><span class='macro'>!</span>(<span class='ident'>frame</span>.<span class='ident'>is_none</span>()); } <span class='doccomment'>/// Tests that the `HeadersFrame::parse` method considers any frame with</span> <span class='doccomment'>/// a frame ID other than 1 in the frame header invalid.</span> <span class='attribute'>#[<span class='ident'>test</span>]</span> <span class='kw'>fn</span> <span class='ident'>test_headers_frame_parse_invalid_type</span>() { <span class='kw'>let</span> <span class='ident'>data</span> <span class='op'>=</span> <span class='string'>b"123"</span>; <span class='kw'>let</span> <span class='ident'>payload</span> <span class='op'>=</span> <span class='ident'>data</span>.<span class='ident'>to_vec</span>(); <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> (<span class='ident'>payload</span>.<span class='ident'>len</span>() <span class='kw'>as</span> <span class='ident'>u32</span>, <span class='number'>0x2</span>, <span class='number'>0</span>, <span class='number'>1</span>); <span class='kw'>let</span> <span class='ident'>frame</span>: <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>HeadersFrame</span><span class='op'>></span> <span class='op'>=</span> <span class='ident'>Frame</span>::<span class='ident'>from_raw</span>( <span class='ident'>RawFrame</span>::<span class='ident'>with_payload</span>(<span class='ident'>header</span>, <span class='ident'>payload</span>)); <span class='macro'>assert</span><span class='macro'>!</span>(<span class='ident'>frame</span>.<span class='ident'>is_none</span>()); } <span class='doccomment'>/// Tests that a simple HEADERS frame (no padding, no priority) gets</span> <span class='doccomment'>/// correctly serialized.</span> <span class='attribute'>#[<span class='ident'>test</span>]</span> <span class='kw'>fn</span> <span class='ident'>test_headers_frame_serialize_simple</span>() { <span class='kw'>let</span> <span class='ident'>data</span> <span class='op'>=</span> <span class='string'>b"123"</span>; <span class='kw'>let</span> <span class='ident'>payload</span> <span class='op'>=</span> <span class='ident'>data</span>.<span class='ident'>to_vec</span>(); <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> (<span class='ident'>payload</span>.<span class='ident'>len</span>() <span class='kw'>as</span> <span class='ident'>u32</span>, <span class='number'>0x1</span>, <span class='number'>0</span>, <span class='number'>1</span>); <span class='kw'>let</span> <span class='ident'>expected</span> <span class='op'>=</span> { <span class='kw'>let</span> <span class='ident'>headers</span> <span class='op'>=</span> <span class='ident'>pack_header</span>(<span class='kw-2'>&</span><span class='ident'>header</span>); <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>res</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span> <span class='op'>=</span> <span class='ident'>Vec</span>::<span class='ident'>new</span>(); <span class='ident'>res</span>.<span class='ident'>extend</span>(<span class='ident'>headers</span>.<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>()); <span class='ident'>res</span>.<span class='ident'>extend</span>(<span class='ident'>payload</span>.<span class='ident'>into_iter</span>()); <span class='ident'>res</span> }; <span class='kw'>let</span> <span class='ident'>frame</span> <span class='op'>=</span> <span class='ident'>HeadersFrame</span>::<span class='ident'>new</span>(<span class='ident'>data</span>.<span class='ident'>to_vec</span>(), <span class='number'>1</span>); <span class='kw'>let</span> <span class='ident'>actual</span> <span class='op'>=</span> <span class='ident'>frame</span>.<span class='ident'>serialize</span>(); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>expected</span>, <span class='ident'>actual</span>); } <span class='doccomment'>/// Tests that a HEADERS frame with padding is correctly serialized.</span> <span class='attribute'>#[<span class='ident'>test</span>]</span> <span class='kw'>fn</span> <span class='ident'>test_headers_frame_serialize_with_padding</span>() { <span class='kw'>let</span> <span class='ident'>data</span> <span class='op'>=</span> <span class='string'>b"123"</span>; <span class='kw'>let</span> <span class='ident'>payload</span> <span class='op'>=</span> <span class='ident'>build_padded_frame_payload</span>(<span class='ident'>data</span>, <span class='number'>6</span>); <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> (<span class='ident'>payload</span>.<span class='ident'>len</span>() <span class='kw'>as</span> <span class='ident'>u32</span>, <span class='number'>0x1</span>, <span class='number'>0x08</span>, <span class='number'>1</span>); <span class='kw'>let</span> <span class='ident'>expected</span> <span class='op'>=</span> { <span class='kw'>let</span> <span class='ident'>headers</span> <span class='op'>=</span> <span class='ident'>pack_header</span>(<span class='kw-2'>&</span><span class='ident'>header</span>); <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>res</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span> <span class='op'>=</span> <span class='ident'>Vec</span>::<span class='ident'>new</span>(); <span class='ident'>res</span>.<span class='ident'>extend</span>(<span class='ident'>headers</span>.<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>()); <span class='ident'>res</span>.<span class='ident'>extend</span>(<span class='ident'>payload</span>.<span class='ident'>into_iter</span>()); <span class='ident'>res</span> }; <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>frame</span> <span class='op'>=</span> <span class='ident'>HeadersFrame</span>::<span class='ident'>new</span>(<span class='ident'>data</span>.<span class='ident'>to_vec</span>(), <span class='number'>1</span>); <span class='ident'>frame</span>.<span class='ident'>set_padding</span>(<span class='number'>6</span>); <span class='kw'>let</span> <span class='ident'>actual</span> <span class='op'>=</span> <span class='ident'>frame</span>.<span class='ident'>serialize</span>(); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>expected</span>, <span class='ident'>actual</span>); } <span class='doccomment'>/// Tests that a HEADERS frame with priority gets correctly serialized.</span> <span class='attribute'>#[<span class='ident'>test</span>]</span> <span class='kw'>fn</span> <span class='ident'>test_headers_frame_serialize_with_priority</span>() { <span class='kw'>let</span> <span class='ident'>data</span> <span class='op'>=</span> <span class='string'>b"123"</span>; <span class='kw'>let</span> <span class='ident'>dep</span> <span class='op'>=</span> <span class='ident'>StreamDependency</span>::<span class='ident'>new</span>(<span class='number'>0</span>, <span class='number'>5</span>, <span class='bool-val'>true</span>); <span class='kw'>let</span> <span class='ident'>payload</span> <span class='op'>=</span> { <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>buf</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span> <span class='op'>=</span> <span class='ident'>Vec</span>::<span class='ident'>new</span>(); <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>dep</span>.<span class='ident'>serialize</span>().<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>()); <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>data</span>.<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>()); <span class='ident'>buf</span> }; <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> (<span class='ident'>payload</span>.<span class='ident'>len</span>() <span class='kw'>as</span> <span class='ident'>u32</span>, <span class='number'>0x1</span>, <span class='number'>0x20</span>, <span class='number'>1</span>); <span class='kw'>let</span> <span class='ident'>expected</span> <span class='op'>=</span> { <span class='kw'>let</span> <span class='ident'>headers</span> <span class='op'>=</span> <span class='ident'>pack_header</span>(<span class='kw-2'>&</span><span class='ident'>header</span>); <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>res</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span> <span class='op'>=</span> <span class='ident'>Vec</span>::<span class='ident'>new</span>(); <span class='ident'>res</span>.<span class='ident'>extend</span>(<span class='ident'>headers</span>.<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>()); <span class='ident'>res</span>.<span class='ident'>extend</span>(<span class='ident'>payload</span>.<span class='ident'>into_iter</span>()); <span class='ident'>res</span> }; <span class='kw'>let</span> <span class='ident'>frame</span> <span class='op'>=</span> <span class='ident'>HeadersFrame</span>::<span class='ident'>with_dependency</span>(<span class='ident'>data</span>.<span class='ident'>to_vec</span>(), <span class='number'>1</span>, <span class='ident'>dep</span>.<span class='ident'>clone</span>()); <span class='kw'>let</span> <span class='ident'>actual</span> <span class='op'>=</span> <span class='ident'>frame</span>.<span class='ident'>serialize</span>(); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>expected</span>, <span class='ident'>actual</span>); } <span class='doccomment'>/// Tests that a HEADERS frame with both padding and a priority gets correctly</span> <span class='doccomment'>/// serialized.</span> <span class='attribute'>#[<span class='ident'>test</span>]</span> <span class='kw'>fn</span> <span class='ident'>test_headers_frame_serialize_padding_and_priority</span>() { <span class='kw'>let</span> <span class='ident'>data</span> <span class='op'>=</span> <span class='string'>b"123"</span>; <span class='kw'>let</span> <span class='ident'>dep</span> <span class='op'>=</span> <span class='ident'>StreamDependency</span>::<span class='ident'>new</span>(<span class='number'>0</span>, <span class='number'>5</span>, <span class='bool-val'>true</span>); <span class='kw'>let</span> <span class='ident'>full</span> <span class='op'>=</span> { <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>buf</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span> <span class='op'>=</span> <span class='ident'>Vec</span>::<span class='ident'>new</span>(); <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>dep</span>.<span class='ident'>serialize</span>().<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>()); <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>data</span>.<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>()); <span class='ident'>buf</span> }; <span class='kw'>let</span> <span class='ident'>payload</span> <span class='op'>=</span> <span class='ident'>build_padded_frame_payload</span>(<span class='kw-2'>&</span><span class='ident'>full</span>, <span class='number'>4</span>); <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> (<span class='ident'>payload</span>.<span class='ident'>len</span>() <span class='kw'>as</span> <span class='ident'>u32</span>, <span class='number'>0x1</span>, <span class='number'>0x20</span> <span class='op'>|</span> <span class='number'>0x8</span>, <span class='number'>1</span>); <span class='kw'>let</span> <span class='ident'>expected</span> <span class='op'>=</span> { <span class='kw'>let</span> <span class='ident'>headers</span> <span class='op'>=</span> <span class='ident'>pack_header</span>(<span class='kw-2'>&</span><span class='ident'>header</span>); <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>res</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span> <span class='op'>=</span> <span class='ident'>Vec</span>::<span class='ident'>new</span>(); <span class='ident'>res</span>.<span class='ident'>extend</span>(<span class='ident'>headers</span>.<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>()); <span class='ident'>res</span>.<span class='ident'>extend</span>(<span class='ident'>payload</span>.<span class='ident'>into_iter</span>()); <span class='ident'>res</span> }; <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>frame</span> <span class='op'>=</span> <span class='ident'>HeadersFrame</span>::<span class='ident'>with_dependency</span>(<span class='ident'>data</span>.<span class='ident'>to_vec</span>(), <span class='number'>1</span>, <span class='ident'>dep</span>.<span class='ident'>clone</span>()); <span class='ident'>frame</span>.<span class='ident'>set_padding</span>(<span class='number'>4</span>); <span class='kw'>let</span> <span class='ident'>actual</span> <span class='op'>=</span> <span class='ident'>frame</span>.<span class='ident'>serialize</span>(); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>expected</span>, <span class='ident'>actual</span>); } <span class='doccomment'>/// Tests that the `HeadersFrame::is_headers_end` method returns the correct</span> <span class='doccomment'>/// value depending on the `EndHeaders` flag being set or not.</span> <span class='attribute'>#[<span class='ident'>test</span>]</span> <span class='kw'>fn</span> <span class='ident'>test_headers_frame_is_headers_end</span>() { <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>frame</span> <span class='op'>=</span> <span class='ident'>HeadersFrame</span>::<span class='ident'>new</span>(<span class='macro'>vec</span><span class='macro'>!</span>[], <span class='number'>1</span>); <span class='macro'>assert</span><span class='macro'>!</span>(<span class='op'>!</span><span class='ident'>frame</span>.<span class='ident'>is_headers_end</span>()); <span class='ident'>frame</span>.<span class='ident'>set_flag</span>(<span class='ident'>HeadersFlag</span>::<span class='ident'>EndHeaders</span>); <span class='macro'>assert</span><span class='macro'>!</span>(<span class='ident'>frame</span>.<span class='ident'>is_headers_end</span>()); } } </pre> </section> <section id='search' class="content hidden"></section> <section class="footer"></section> <aside id="help" class="hidden"> <div> <h1 class="hidden">Help</h1> <div class="shortcuts"> <h2>Keyboard Shortcuts</h2> <dl> <dt>?</dt> <dd>Show this help dialog</dd> <dt>S</dt> <dd>Focus the search field</dd> <dt>⇤</dt> <dd>Move up in search results</dd> <dt>⇥</dt> <dd>Move down in search results</dd> <dt>⏎</dt> <dd>Go to active search result</dd> <dt>+</dt> <dd>Collapse/expand all sections</dd> </dl> </div> <div class="infos"> <h2>Search Tricks</h2> <p> Prefix searches with a type followed by a colon (e.g. <code>fn:</code>) to restrict the search to a given type. </p> <p> Accepted types are: <code>fn</code>, <code>mod</code>, <code>struct</code>, <code>enum</code>, <code>trait</code>, <code>type</code>, <code>macro</code>, and <code>const</code>. </p> <p> Search functions by type signature (e.g. <code>vec -> usize</code> or <code>* -> vec</code>) </p> </div> </div> </aside> <script> window.rootPath = "../../../../"; 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