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<section id='main' class="content"><h1 class='fqn'><span class='in-band'>Function <a href='index.html'>mailparse</a>::<wbr><a class="fn" href=''>parse_headers</a></span><span class='out-of-band'><span id='render-detail'>
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</span><a class='srclink' href='../src/mailparse/lib.rs.html#465-490' title='goto source code'>[src]</a></span></h1><pre class='rust fn'>pub fn parse_headers(<br> raw_data: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&[</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a><br>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">(</a><a class="struct" href="https://doc.rust-lang.org/nightly/alloc/vec/struct.Vec.html" title="struct alloc::vec::Vec">Vec</a><<a class="struct" href="../mailparse/struct.MailHeader.html" title="struct mailparse::MailHeader">MailHeader</a>>, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">)</a>, <a class="enum" href="../mailparse/enum.MailParseError.html" title="enum mailparse::MailParseError">MailParseError</a>></pre><div class='docblock'><p>Parses all the headers from the raw data given.
This function takes raw byte data, and starts parsing it, expecting there
to be zero or more MIME header key-value pair right at the beginning,
followed by two consecutive newlines (i.e. a blank line). It parses those
headers and returns them in a vector. The normal vector functions can be
used to access the headers linearly, or the MailHeaderMap trait can be used
to access them in a map-like fashion. Along with this vector, the function
returns the index at which the message body is expected to start. If you
just care about the headers, you can ignore the second component of the
returned tuple.
Error values are returned if there was some sort of parsing error.</p>
<h1 id="examples" class="section-header"><a href="#examples">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">mailparse</span>::{<span class="ident">parse_headers</span>, <span class="ident">MailHeaderMap</span>};
<span class="kw">let</span> (<span class="ident">headers</span>, <span class="kw">_</span>) <span class="op">=</span> <span class="ident">parse_headers</span>(<span class="macro">concat</span><span class="macro">!</span>(
<span class="string">"Subject: Test\n"</span>,
<span class="string">"From: me@myself.com\n"</span>,
<span class="string">"To: you@yourself.com"</span>).<span class="ident">as_bytes</span>())
.<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">headers</span>[<span class="number">1</span>].<span class="ident">get_key</span>().<span class="ident">unwrap</span>(), <span class="string">"From"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">headers</span>.<span class="ident">get_first_value</span>(<span class="string">"To"</span>).<span class="ident">unwrap</span>(), <span class="prelude-val">Some</span>(<span class="string">"you@yourself.com"</span>.<span class="ident">to_string</span>()));</pre>
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