Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

11 files changed, 1682 insertions, 0 deletions

diff --git a/third_party/rust/mime/.cargo-checksum.json b/third_party/rust/mime/.cargo-checksum.json
new file mode 100644
index 0000000000..220a471312
--- /dev/null
+++ b/third_party/rust/mime/.cargo-checksum.json
@@ -0,0 +1 @@
+{"files":{"CONTRIBUTING.md":"7a8f1d12eb98bd09c290d31f25b03c71ff78027d9fc468e8782efa7dd3e69f1c","Cargo.toml":"75e36b40187c8edad0baae326a0903b6b462f1acd0d68102a8e4f006b8802041","LICENSE-APACHE":"a60eea817514531668d7e00765731449fe14d059d3249e0bc93b36de45f759f2","LICENSE-MIT":"df9cfd06d8a44d9a671eadd39ffd97f166481da015a30f45dfd27886209c5922","README.md":"4ac32f1d6d7e1ac9f89f0a6d7d0cbc26f20ef9defdc7b206ef3a77616f493bbf","benches/cmp.rs":"9deb7c222eb69e7c5160aa82d361d4883792be3b557fbf8f7c807b398ba951a1","benches/fmt.rs":"46ec1e7c7970a3eed84b303309a2395ac16d16534ea691db7f361d0016ef0673","benches/parse.rs":"af2b35fc314e39c7fb3fbe6a77b65e54d0f4bd8956950330700028a98513b7d8","src/lib.rs":"c848e55a49ae4ed6451e94c8c120451b5031ba2ab87170ed389eeb4731679446","src/parse.rs":"cfe11f611901a581245b091942bb28ef2eec57645b981e1699d247f11c9e6fe3"},"package":"2a60c7ce501c71e03a9c9c0d35b861413ae925bd979cc7a4e30d060069aaac8d"}
\ No newline at end of file
diff --git a/third_party/rust/mime/CONTRIBUTING.md b/third_party/rust/mime/CONTRIBUTING.md
new file mode 100644
index 0000000000..3fbc3a3123
--- /dev/null
+++ b/third_party/rust/mime/CONTRIBUTING.md
@@ -0,0 +1,12 @@
+# Contributing to mime
+
+## License
+
+Licensed under either of
+
+- Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or http://apache.org/licenses/LICENSE-2.0)
+- MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
+
+### Contribution
+
+Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.
diff --git a/third_party/rust/mime/Cargo.toml b/third_party/rust/mime/Cargo.toml
new file mode 100644
index 0000000000..1f34190e7e
--- /dev/null
+++ b/third_party/rust/mime/Cargo.toml
@@ -0,0 +1,23 @@
+# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
+#
+# When uploading crates to the registry Cargo will automatically
+# "normalize" Cargo.toml files for maximal compatibility
+# with all versions of Cargo and also rewrite `path` dependencies
+# to registry (e.g., crates.io) dependencies
+#
+# If you believe there's an error in this file please file an
+# issue against the rust-lang/cargo repository. If you're
+# editing this file be aware that the upstream Cargo.toml
+# will likely look very different (and much more reasonable)
+
+[package]
+name = "mime"
+version = "0.3.16"
+authors = ["Sean McArthur <sean@seanmonstar.com>"]
+description = "Strongly Typed Mimes"
+documentation = "https://docs.rs/mime"
+keywords = ["mime", "media-extensions", "media-types"]
+license = "MIT/Apache-2.0"
+repository = "https://github.com/hyperium/mime"
+
+[dependencies]
diff --git a/third_party/rust/mime/LICENSE-APACHE b/third_party/rust/mime/LICENSE-APACHE
new file mode 100644
index 0000000000..16fe87b06e
--- /dev/null
+++ b/third_party/rust/mime/LICENSE-APACHE
@@ -0,0 +1,201 @@
+                              Apache License
+                        Version 2.0, January 2004
+                     http://www.apache.org/licenses/
+
+TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+1. Definitions.
+
+   "License" shall mean the terms and conditions for use, reproduction,
+   and distribution as defined by Sections 1 through 9 of this document.
+
+   "Licensor" shall mean the copyright owner or entity authorized by
+   the copyright owner that is granting the License.
+
+   "Legal Entity" shall mean the union of the acting entity and all
+   other entities that control, are controlled by, or are under common
+   control with that entity. For the purposes of this definition,
+   "control" means (i) the power, direct or indirect, to cause the
+   direction or management of such entity, whether by contract or
+   otherwise, or (ii) ownership of fifty percent (50%) or more of the
+   outstanding shares, or (iii) beneficial ownership of such entity.
+
+   "You" (or "Your") shall mean an individual or Legal Entity
+   exercising permissions granted by this License.
+
+   "Source" form shall mean the preferred form for making modifications,
+   including but not limited to software source code, documentation
+   source, and configuration files.
+
+   "Object" form shall mean any form resulting from mechanical
+   transformation or translation of a Source form, including but
+   not limited to compiled object code, generated documentation,
+   and conversions to other media types.
+
+   "Work" shall mean the work of authorship, whether in Source or
+   Object form, made available under the License, as indicated by a
+   copyright notice that is included in or attached to the work
+   (an example is provided in the Appendix below).
+
+   "Derivative Works" shall mean any work, whether in Source or Object
+   form, that is based on (or derived from) the Work and for which the
+   editorial revisions, annotations, elaborations, or other modifications
+   represent, as a whole, an original work of authorship. For the purposes
+   of this License, Derivative Works shall not include works that remain
+   separable from, or merely link (or bind by name) to the interfaces of,
+   the Work and Derivative Works thereof.
+
+   "Contribution" shall mean any work of authorship, including
+   the original version of the Work and any modifications or additions
+   to that Work or Derivative Works thereof, that is intentionally
+   submitted to Licensor for inclusion in the Work by the copyright owner
+   or by an individual or Legal Entity authorized to submit on behalf of
+   the copyright owner. For the purposes of this definition, "submitted"
+   means any form of electronic, verbal, or written communication sent
+   to the Licensor or its representatives, including but not limited to
+   communication on electronic mailing lists, source code control systems,
+   and issue tracking systems that are managed by, or on behalf of, the
+   Licensor for the purpose of discussing and improving the Work, but
+   excluding communication that is conspicuously marked or otherwise
+   designated in writing by the copyright owner as "Not a Contribution."
+
+   "Contributor" shall mean Licensor and any individual or Legal Entity
+   on behalf of whom a Contribution has been received by Licensor and
+   subsequently incorporated within the Work.
+
+2. Grant of Copyright License. Subject to the terms and conditions of
+   this License, each Contributor hereby grants to You a perpetual,
+   worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+   copyright license to reproduce, prepare Derivative Works of,
+   publicly display, publicly perform, sublicense, and distribute the
+   Work and such Derivative Works in Source or Object form.
+
+3. Grant of Patent License. Subject to the terms and conditions of
+   this License, each Contributor hereby grants to You a perpetual,
+   worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+   (except as stated in this section) patent license to make, have made,
+   use, offer to sell, sell, import, and otherwise transfer the Work,
+   where such license applies only to those patent claims licensable
+   by such Contributor that are necessarily infringed by their
+   Contribution(s) alone or by combination of their Contribution(s)
+   with the Work to which such Contribution(s) was submitted. If You
+   institute patent litigation against any entity (including a
+   cross-claim or counterclaim in a lawsuit) alleging that the Work
+   or a Contribution incorporated within the Work constitutes direct
+   or contributory patent infringement, then any patent licenses
+   granted to You under this License for that Work shall terminate
+   as of the date such litigation is filed.
+
+4. Redistribution. You may reproduce and distribute copies of the
+   Work or Derivative Works thereof in any medium, with or without
+   modifications, and in Source or Object form, provided that You
+   meet the following conditions:
+
+   (a) You must give any other recipients of the Work or
+       Derivative Works a copy of this License; and
+
+   (b) You must cause any modified files to carry prominent notices
+       stating that You changed the files; and
+
+   (c) You must retain, in the Source form of any Derivative Works
+       that You distribute, all copyright, patent, trademark, and
+       attribution notices from the Source form of the Work,
+       excluding those notices that do not pertain to any part of
+       the Derivative Works; and
+
+   (d) If the Work includes a "NOTICE" text file as part of its
+       distribution, then any Derivative Works that You distribute must
+       include a readable copy of the attribution notices contained
+       within such NOTICE file, excluding those notices that do not
+       pertain to any part of the Derivative Works, in at least one
+       of the following places: within a NOTICE text file distributed
+       as part of the Derivative Works; within the Source form or
+       documentation, if provided along with the Derivative Works; or,
+       within a display generated by the Derivative Works, if and
+       wherever such third-party notices normally appear. The contents
+       of the NOTICE file are for informational purposes only and
+       do not modify the License. You may add Your own attribution
+       notices within Derivative Works that You distribute, alongside
+       or as an addendum to the NOTICE text from the Work, provided
+       that such additional attribution notices cannot be construed
+       as modifying the License.
+
+   You may add Your own copyright statement to Your modifications and
+   may provide additional or different license terms and conditions
+   for use, reproduction, or distribution of Your modifications, or
+   for any such Derivative Works as a whole, provided Your use,
+   reproduction, and distribution of the Work otherwise complies with
+   the conditions stated in this License.
+
+5. Submission of Contributions. Unless You explicitly state otherwise,
+   any Contribution intentionally submitted for inclusion in the Work
+   by You to the Licensor shall be under the terms and conditions of
+   this License, without any additional terms or conditions.
+   Notwithstanding the above, nothing herein shall supersede or modify
+   the terms of any separate license agreement you may have executed
+   with Licensor regarding such Contributions.
+
+6. Trademarks. This License does not grant permission to use the trade
+   names, trademarks, service marks, or product names of the Licensor,
+   except as required for reasonable and customary use in describing the
+   origin of the Work and reproducing the content of the NOTICE file.
+
+7. Disclaimer of Warranty. Unless required by applicable law or
+   agreed to in writing, Licensor provides the Work (and each
+   Contributor provides its Contributions) on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+   implied, including, without limitation, any warranties or conditions
+   of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+   PARTICULAR PURPOSE. You are solely responsible for determining the
+   appropriateness of using or redistributing the Work and assume any
+   risks associated with Your exercise of permissions under this License.
+
+8. Limitation of Liability. In no event and under no legal theory,
+   whether in tort (including negligence), contract, or otherwise,
+   unless required by applicable law (such as deliberate and grossly
+   negligent acts) or agreed to in writing, shall any Contributor be
+   liable to You for damages, including any direct, indirect, special,
+   incidental, or consequential damages of any character arising as a
+   result of this License or out of the use or inability to use the
+   Work (including but not limited to damages for loss of goodwill,
+   work stoppage, computer failure or malfunction, or any and all
+   other commercial damages or losses), even if such Contributor
+   has been advised of the possibility of such damages.
+
+9. Accepting Warranty or Additional Liability. While redistributing
+   the Work or Derivative Works thereof, You may choose to offer,
+   and charge a fee for, acceptance of support, warranty, indemnity,
+   or other liability obligations and/or rights consistent with this
+   License. However, in accepting such obligations, You may act only
+   on Your own behalf and on Your sole responsibility, not on behalf
+   of any other Contributor, and only if You agree to indemnify,
+   defend, and hold each Contributor harmless for any liability
+   incurred by, or claims asserted against, such Contributor by reason
+   of your accepting any such warranty or additional liability.
+
+END OF TERMS AND CONDITIONS
+
+APPENDIX: How to apply the Apache License to your work.
+
+   To apply the Apache License to your work, attach the following
+   boilerplate notice, with the fields enclosed by brackets "[]"
+   replaced with your own identifying information. (Don't include
+   the brackets!)  The text should be enclosed in the appropriate
+   comment syntax for the file format. We also recommend that a
+   file or class name and description of purpose be included on the
+   same "printed page" as the copyright notice for easier
+   identification within third-party archives.
+
+Copyright [yyyy] [name of copyright owner]
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+	http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
diff --git a/third_party/rust/mime/LICENSE-MIT b/third_party/rust/mime/LICENSE-MIT
new file mode 100644
index 0000000000..557b7e5fc9
--- /dev/null
+++ b/third_party/rust/mime/LICENSE-MIT
@@ -0,0 +1,20 @@
+Copyright (c) 2014 Sean McArthur
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+
diff --git a/third_party/rust/mime/README.md b/third_party/rust/mime/README.md
new file mode 100644
index 0000000000..dba6314078
--- /dev/null
+++ b/third_party/rust/mime/README.md
@@ -0,0 +1,31 @@
+# mime
+
+[![Build Status](https://travis-ci.org/hyperium/mime.svg?branch=master)](https://travis-ci.org/hyperium/mime)
+[![crates.io](https://img.shields.io/crates/v/mime.svg)](https://crates.io/crates/mime)
+[![docs.rs](https://docs.rs/mime/badge.svg)](https://docs.rs/mime)
+
+Support MIME (Media Types) as strong types in Rust.
+
+[Documentation](https://docs.rs/mime)
+
+## Usage
+
+```rust
+extern crate mime;
+
+// common types are constants
+let text = mime::TEXT_PLAIN;
+
+// deconstruct Mimes to match on them
+match (text.type_(), text.subtype()) {
+    (mime::TEXT, mime::PLAIN) => {
+        // plain text!
+    },
+    (mime::TEXT, _) => {
+        // structured text!
+    },
+    _ => {
+        // not text!
+    }
+}
+```
diff --git a/third_party/rust/mime/benches/cmp.rs b/third_party/rust/mime/benches/cmp.rs
new file mode 100644
index 0000000000..b7c64f64f6
--- /dev/null
+++ b/third_party/rust/mime/benches/cmp.rs
@@ -0,0 +1,46 @@
+#![feature(test)]
+
+extern crate mime;
+extern crate test;
+
+use mime::*;
+use test::Bencher;
+
+#[bench]
+fn bench_eq_parsed(b: &mut Bencher) {
+    let mime = "text/plain; charset=utf-8".parse::<Mime>().unwrap();
+    b.bytes = mime.as_ref().len() as u64;
+    b.iter(|| {
+        assert_eq!(mime, TEXT_PLAIN_UTF_8);
+    })
+}
+
+#[bench]
+fn bench_eq_consts(b: &mut Bencher) {
+    let mime = TEXT_PLAIN_UTF_8;
+    b.bytes = mime.as_ref().len() as u64;
+    b.iter(|| {
+        assert_eq!(mime, TEXT_PLAIN_UTF_8);
+    });
+}
+
+
+#[bench]
+fn bench_ne_consts(b: &mut Bencher) {
+    let one = TEXT_XML;
+    let two = TEXT_CSS;
+    b.bytes = one.as_ref().len() as u64;
+    b.iter(|| {
+        assert_ne!(one, two);
+    });
+}
+
+#[bench]
+fn bench_eq_type_(b: &mut Bencher) {
+    let mime = TEXT_PLAIN_UTF_8;
+    let name = TEXT;
+    b.bytes = name.as_ref().len() as u64;
+    b.iter(|| {
+        assert_eq!(mime.type_(), name);
+    });
+}
diff --git a/third_party/rust/mime/benches/fmt.rs b/third_party/rust/mime/benches/fmt.rs
new file mode 100644
index 0000000000..106de1a1e6
--- /dev/null
+++ b/third_party/rust/mime/benches/fmt.rs
@@ -0,0 +1,19 @@
+#![feature(test)]
+
+extern crate mime;
+extern crate test;
+
+use test::Bencher;
+
+#[bench]
+fn bench_fmt(b: &mut Bencher) {
+    use std::fmt::Write;
+    let mime = ::mime::TEXT_PLAIN_UTF_8;
+    b.bytes = mime.to_string().as_bytes().len() as u64;
+    let mut s = String::with_capacity(64);
+    b.iter(|| {
+        let _ = write!(s, "{}", mime);
+        ::test::black_box(&s);
+        unsafe { s.as_mut_vec().set_len(0); }
+    })
+}
diff --git a/third_party/rust/mime/benches/parse.rs b/third_party/rust/mime/benches/parse.rs
new file mode 100644
index 0000000000..7d47781a0d
--- /dev/null
+++ b/third_party/rust/mime/benches/parse.rs
@@ -0,0 +1,29 @@
+#![feature(test)]
+
+extern crate mime;
+extern crate test;
+
+use mime::Mime;
+use test::Bencher;
+
+
+#[bench]
+fn bench_from_str(b: &mut Bencher) {
+    let s = "text/plain";
+    b.bytes = s.as_bytes().len() as u64;
+    b.iter(|| s.parse::<Mime>())
+}
+
+#[bench]
+fn bench_from_str_charset_utf8(b: &mut Bencher) {
+    let s = "text/plain; charset=utf-8";
+    b.bytes = s.as_bytes().len() as u64;
+    b.iter(|| s.parse::<Mime>())
+}
+
+#[bench]
+fn bench_from_str_extended(b: &mut Bencher) {
+    let s = "text/plain; charset=utf-8; foo=bar";
+    b.bytes = s.as_bytes().len() as u64;
+    b.iter(|| s.parse::<Mime>())
+}
diff --git a/third_party/rust/mime/src/lib.rs b/third_party/rust/mime/src/lib.rs
new file mode 100644
index 0000000000..1f24fb1cf0
--- /dev/null
+++ b/third_party/rust/mime/src/lib.rs
@@ -0,0 +1,937 @@
+//! # Mime
+//!
+//! Mime is now Media Type, technically, but `Mime` is more immediately
+//! understandable, so the main type here is `Mime`.
+//!
+//! ## What is Mime?
+//!
+//! Example mime string: `text/plain`
+//!
+//! ```
+//! let plain_text: mime::Mime = "text/plain".parse().unwrap();
+//! assert_eq!(plain_text, mime::TEXT_PLAIN);
+//! ```
+//!
+//! ## Inspecting Mimes
+//!
+//! ```
+//! let mime = mime::TEXT_PLAIN;
+//! match (mime.type_(), mime.subtype()) {
+//!     (mime::TEXT, mime::PLAIN) => println!("plain text!"),
+//!     (mime::TEXT, _) => println!("structured text"),
+//!     _ => println!("not text"),
+//! }
+//! ```
+
+#![doc(html_root_url = "https://docs.rs/mime/0.3.16")]
+#![deny(warnings)]
+#![deny(missing_docs)]
+#![deny(missing_debug_implementations)]
+
+
+use std::cmp::Ordering;
+use std::error::Error;
+use std::fmt;
+use std::hash::{Hash, Hasher};
+use std::str::FromStr;
+use std::slice;
+
+mod parse;
+
+/// A parsed mime or media type.
+#[derive(Clone)]
+pub struct Mime {
+    source: Source,
+    slash: usize,
+    plus: Option<usize>,
+    params: ParamSource,
+}
+
+/// A section of a `Mime`.
+///
+/// For instance, for the Mime `image/svg+xml`, it contains 3 `Name`s,
+/// `image`, `svg`, and `xml`.
+///
+/// In most cases, `Name`s are compared ignoring case.
+#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub struct Name<'a> {
+    // TODO: optimize with an Atom-like thing
+    // There a `const` Names, and so it is possible for the statis strings
+    // to havea different memory address. Additionally, when used in match
+    // statements, the strings are compared with a memcmp, possibly even
+    // if the address and length are the same.
+    //
+    // Being an enum with an Atom variant that is a usize (and without a
+    // string pointer and boolean) would allow for faster comparisons.
+    source: &'a str,
+    insensitive: bool,
+}
+
+/// An error when parsing a `Mime` from a string.
+#[derive(Debug)]
+pub struct FromStrError {
+    inner: parse::ParseError,
+}
+
+impl FromStrError {
+    fn s(&self) -> &str {
+        "mime parse error"
+    }
+}
+
+impl fmt::Display for FromStrError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{}: {}", self.s(), self.inner)
+    }
+}
+
+impl Error for FromStrError {
+    // Minimum Rust is 1.15, Error::description was still required then
+    #[allow(deprecated)]
+    fn description(&self) -> &str {
+        self.s()
+    }
+}
+
+#[derive(Clone)]
+enum Source {
+    Atom(u8, &'static str),
+    Dynamic(String),
+}
+
+impl Source {
+    fn as_ref(&self) -> &str {
+        match *self {
+            Source::Atom(_, s) => s,
+            Source::Dynamic(ref s) => s,
+        }
+    }
+}
+
+#[derive(Clone)]
+enum ParamSource {
+    Utf8(usize),
+    Custom(usize, Vec<(Indexed, Indexed)>),
+    None,
+}
+
+#[derive(Clone, Copy)]
+struct Indexed(usize, usize);
+
+impl Mime {
+    /// Get the top level media type for this `Mime`.
+    ///
+    /// # Example
+    ///
+    /// ```
+    /// let mime = mime::TEXT_PLAIN;
+    /// assert_eq!(mime.type_(), "text");
+    /// assert_eq!(mime.type_(), mime::TEXT);
+    /// ```
+    #[inline]
+    pub fn type_(&self) -> Name {
+        Name {
+            source: &self.source.as_ref()[..self.slash],
+            insensitive: true,
+        }
+    }
+
+    /// Get the subtype of this `Mime`.
+    ///
+    /// # Example
+    ///
+    /// ```
+    /// let mime = mime::TEXT_PLAIN;
+    /// assert_eq!(mime.subtype(), "plain");
+    /// assert_eq!(mime.subtype(), mime::PLAIN);
+    /// ```
+    #[inline]
+    pub fn subtype(&self) -> Name {
+        let end = self.plus.unwrap_or_else(|| {
+            return self.semicolon().unwrap_or(self.source.as_ref().len())
+        });
+        Name {
+            source: &self.source.as_ref()[self.slash + 1..end],
+            insensitive: true,
+        }
+    }
+
+    /// Get an optional +suffix for this `Mime`.
+    ///
+    /// # Example
+    ///
+    /// ```
+    /// let svg = "image/svg+xml".parse::<mime::Mime>().unwrap();
+    /// assert_eq!(svg.suffix(), Some(mime::XML));
+    /// assert_eq!(svg.suffix().unwrap(), "xml");
+    ///
+    ///
+    /// assert!(mime::TEXT_PLAIN.suffix().is_none());
+    /// ```
+    #[inline]
+    pub fn suffix(&self) -> Option<Name> {
+        let end = self.semicolon().unwrap_or(self.source.as_ref().len());
+        self.plus.map(|idx| Name {
+            source: &self.source.as_ref()[idx + 1..end],
+            insensitive: true,
+        })
+    }
+
+    /// Look up a parameter by name.
+    ///
+    /// # Example
+    ///
+    /// ```
+    /// let mime = mime::TEXT_PLAIN_UTF_8;
+    /// assert_eq!(mime.get_param(mime::CHARSET), Some(mime::UTF_8));
+    /// assert_eq!(mime.get_param("charset").unwrap(), "utf-8");
+    /// assert!(mime.get_param("boundary").is_none());
+    ///
+    /// let mime = "multipart/form-data; boundary=ABCDEFG".parse::<mime::Mime>().unwrap();
+    /// assert_eq!(mime.get_param(mime::BOUNDARY).unwrap(), "ABCDEFG");
+    /// ```
+    pub fn get_param<'a, N>(&'a self, attr: N) -> Option<Name<'a>>
+    where N: PartialEq<Name<'a>> {
+        self.params().find(|e| attr == e.0).map(|e| e.1)
+    }
+
+    /// Returns an iterator over the parameters.
+    #[inline]
+    pub fn params<'a>(&'a self) -> Params<'a> {
+        let inner = match self.params {
+            ParamSource::Utf8(_) => ParamsInner::Utf8,
+            ParamSource::Custom(_, ref params) => {
+                ParamsInner::Custom {
+                    source: &self.source,
+                    params: params.iter(),
+                }
+            }
+            ParamSource::None => ParamsInner::None,
+        };
+
+        Params(inner)
+    }
+
+    /// Return a `&str` of the Mime's ["essence"][essence].
+    ///
+    /// [essence]: https://mimesniff.spec.whatwg.org/#mime-type-essence
+    pub fn essence_str(&self) -> &str {
+        let end = self.semicolon().unwrap_or(self.source.as_ref().len());
+
+        &self.source.as_ref()[..end]
+    }
+
+    #[cfg(test)]
+    fn has_params(&self) -> bool {
+        match self.params {
+            ParamSource::None => false,
+            _ => true,
+        }
+    }
+
+    #[inline]
+    fn semicolon(&self) -> Option<usize> {
+        match self.params {
+            ParamSource::Utf8(i) |
+            ParamSource::Custom(i, _) => Some(i),
+            ParamSource::None => None,
+        }
+    }
+
+    fn atom(&self) -> u8 {
+        match self.source {
+            Source::Atom(a, _) => a,
+            _ => 0,
+        }
+    }
+}
+
+// Mime ============
+
+fn eq_ascii(a: &str, b: &str) -> bool {
+    // str::eq_ignore_ascii_case didn't stabilize until Rust 1.23.
+    // So while our MSRV is 1.15, gotta import this trait.
+    #[allow(deprecated, unused)]
+    use std::ascii::AsciiExt;
+
+    a.eq_ignore_ascii_case(b)
+}
+
+fn mime_eq_str(mime: &Mime, s: &str) -> bool {
+    if let ParamSource::Utf8(semicolon) = mime.params {
+        if mime.source.as_ref().len() == s.len() {
+            eq_ascii(mime.source.as_ref(), s)
+        } else {
+            params_eq(semicolon, mime.source.as_ref(), s)
+        }
+    } else if let Some(semicolon) = mime.semicolon() {
+        params_eq(semicolon, mime.source.as_ref(), s)
+    } else {
+        eq_ascii(mime.source.as_ref(), s)
+    }
+}
+
+fn params_eq(semicolon: usize, a: &str, b: &str) -> bool {
+    if b.len() < semicolon + 1 {
+        false
+    } else if !eq_ascii(&a[..semicolon], &b[..semicolon]) {
+        false
+    } else {
+        // gotta check for quotes, LWS, and for case senstive names
+        let mut a = &a[semicolon + 1..];
+        let mut b = &b[semicolon + 1..];
+        let mut sensitive;
+
+        loop {
+            a = a.trim();
+            b = b.trim();
+
+            match (a.is_empty(), b.is_empty()) {
+                (true, true) => return true,
+                (true, false) |
+                (false, true) => return false,
+                (false, false) => (),
+            }
+
+            //name
+            if let Some(a_idx) = a.find('=') {
+                let a_name = {
+                    #[allow(deprecated)]
+                    { a[..a_idx].trim_left() }
+                };
+                if let Some(b_idx) = b.find('=') {
+                    let b_name = {
+                        #[allow(deprecated)]
+                        { b[..b_idx].trim_left() }
+                    };
+                    if !eq_ascii(a_name, b_name) {
+                        return false;
+                    }
+                    sensitive = a_name != CHARSET;
+                    a = &a[..a_idx];
+                    b = &b[..b_idx];
+                } else {
+                    return false;
+                }
+            } else {
+                return false;
+            }
+            //value
+            let a_quoted = if a.as_bytes()[0] == b'"' {
+                a = &a[1..];
+                true
+            } else {
+                false
+            };
+            let b_quoted = if b.as_bytes()[0] == b'"' {
+                b = &b[1..];
+                true
+            } else {
+                false
+            };
+
+            let a_end = if a_quoted {
+                if let Some(quote) = a.find('"') {
+                    quote
+                } else {
+                    return false;
+                }
+            } else {
+                a.find(';').unwrap_or(a.len())
+            };
+
+            let b_end = if b_quoted {
+                if let Some(quote) = b.find('"') {
+                    quote
+                } else {
+                    return false;
+                }
+            } else {
+                b.find(';').unwrap_or(b.len())
+            };
+
+            if sensitive {
+                if !eq_ascii(&a[..a_end], &b[..b_end]) {
+                    return false;
+                }
+            } else {
+                if &a[..a_end] != &b[..b_end] {
+                    return false;
+                }
+            }
+            a = &a[a_end..];
+            b = &b[b_end..];
+        }
+    }
+}
+
+impl PartialEq for Mime {
+    #[inline]
+    fn eq(&self, other: &Mime) -> bool {
+        match (self.atom(), other.atom()) {
+            // TODO:
+            // This could optimize for when there are no customs parameters.
+            // Any parsed mime has already been lowercased, so if there aren't
+            // any parameters that are case sensistive, this can skip the
+            // eq_ascii, and just use a memcmp instead.
+            (0, _) |
+            (_, 0) => mime_eq_str(self, other.source.as_ref()),
+            (a, b) => a == b,
+        }
+    }
+}
+
+impl Eq for Mime {}
+
+impl PartialOrd for Mime {
+    fn partial_cmp(&self, other: &Mime) -> Option<Ordering> {
+        Some(self.cmp(other))
+    }
+}
+
+impl Ord for Mime {
+    fn cmp(&self, other: &Mime) -> Ordering {
+        self.source.as_ref().cmp(other.source.as_ref())
+    }
+}
+
+impl Hash for Mime {
+    fn hash<T: Hasher>(&self, hasher: &mut T) {
+        hasher.write(self.source.as_ref().as_bytes());
+    }
+}
+
+impl<'a> PartialEq<&'a str> for Mime {
+    #[inline]
+    fn eq(&self, s: & &'a str) -> bool {
+        mime_eq_str(self, *s)
+    }
+}
+
+impl<'a> PartialEq<Mime> for &'a str {
+    #[inline]
+    fn eq(&self, mime: &Mime) -> bool {
+        mime_eq_str(mime, *self)
+    }
+}
+
+impl FromStr for Mime {
+    type Err = FromStrError;
+
+    fn from_str(s: &str) -> Result<Mime, Self::Err> {
+        parse::parse(s).map_err(|e| FromStrError { inner: e })
+    }
+}
+
+impl AsRef<str> for Mime {
+    #[inline]
+    fn as_ref(&self) -> &str {
+        self.source.as_ref()
+    }
+}
+
+impl fmt::Debug for Mime {
+    #[inline]
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        fmt::Debug::fmt(self.source.as_ref(), f)
+    }
+}
+
+impl fmt::Display for Mime {
+    #[inline]
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        fmt::Display::fmt(self.source.as_ref(), f)
+    }
+}
+
+// Name ============
+
+fn name_eq_str(name: &Name, s: &str) -> bool {
+    if name.insensitive {
+        eq_ascii(name.source, s)
+    } else {
+        name.source == s
+    }
+}
+
+impl<'a> Name<'a> {
+    /// Get the value of this `Name` as a string.
+    ///
+    /// Note that the borrow is not tied to `&self` but the `'a` lifetime, allowing the
+    /// string to outlive `Name`. Alternately, there is an `impl<'a> From<Name<'a>> for &'a str`
+    /// which isn't rendered by Rustdoc, that can be accessed using `str::from(name)` or `name.into()`.
+    pub fn as_str(&self) -> &'a str {
+        self.source
+    }
+}
+
+impl<'a, 'b> PartialEq<&'b str> for Name<'a> {
+    #[inline]
+    fn eq(&self, other: & &'b str) -> bool {
+        name_eq_str(self, *other)
+    }
+}
+
+impl<'a, 'b> PartialEq<Name<'a>> for &'b str {
+    #[inline]
+    fn eq(&self, other: &Name<'a>) -> bool {
+        name_eq_str(other, *self)
+    }
+}
+
+impl<'a> AsRef<str> for Name<'a> {
+    #[inline]
+    fn as_ref(&self) -> &str {
+        self.source
+    }
+}
+
+impl<'a> From<Name<'a>> for &'a str {
+    #[inline]
+    fn from(name: Name<'a>) -> &'a str {
+        name.source
+    }
+}
+
+impl<'a> fmt::Debug for Name<'a> {
+    #[inline]
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        fmt::Debug::fmt(self.source, f)
+    }
+}
+
+impl<'a> fmt::Display for Name<'a> {
+    #[inline]
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        fmt::Display::fmt(self.source, f)
+    }
+}
+
+// Params ===================
+
+enum ParamsInner<'a> {
+    Utf8,
+    Custom {
+        source: &'a Source,
+        params: slice::Iter<'a, (Indexed, Indexed)>,
+    },
+    None,
+}
+
+/// An iterator over the parameters of a MIME.
+pub struct Params<'a>(ParamsInner<'a>);
+
+impl<'a> fmt::Debug for Params<'a> {
+    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
+        fmt.debug_struct("Params").finish()
+    }
+}
+
+impl<'a> Iterator for Params<'a> {
+    type Item = (Name<'a>, Name<'a>);
+
+    #[inline]
+    fn next(&mut self) -> Option<(Name<'a>, Name<'a>)> {
+        match self.0 {
+            ParamsInner::Utf8 => {
+                let value = (CHARSET, UTF_8);
+                self.0 = ParamsInner::None;
+                Some(value)
+            }
+            ParamsInner::Custom { source, ref mut params } => {
+                params.next().map(|&(name, value)| {
+                    let name = Name {
+                        source: &source.as_ref()[name.0..name.1],
+                        insensitive: true,
+                    };
+                    let value = Name {
+                        source: &source.as_ref()[value.0..value.1],
+                        insensitive: name == CHARSET,
+                    };
+                    (name, value)
+                })
+            }
+            ParamsInner::None => None
+        }
+    }
+
+    #[inline]
+    fn size_hint(&self) -> (usize, Option<usize>) {
+        match self.0 {
+            ParamsInner::Utf8 => (1, Some(1)),
+            ParamsInner::Custom { ref params, .. } => params.size_hint(),
+            ParamsInner::None => (0, Some(0)),
+        }
+    }
+}
+
+macro_rules! names {
+    ($($id:ident, $e:expr;)*) => (
+        $(
+        #[doc = $e]
+        pub const $id: Name<'static> = Name {
+            source: $e,
+            insensitive: true,
+        };
+        )*
+
+        #[test]
+        fn test_names_macro_consts() {
+            #[allow(unused, deprecated)]
+            use std::ascii::AsciiExt;
+            $(
+            assert_eq!($id.source.to_ascii_lowercase(), $id.source);
+            )*
+        }
+    )
+}
+
+names! {
+    STAR, "*";
+
+    TEXT, "text";
+    IMAGE, "image";
+    AUDIO, "audio";
+    VIDEO, "video";
+    APPLICATION, "application";
+    MULTIPART, "multipart";
+    MESSAGE, "message";
+    MODEL, "model";
+    FONT, "font";
+
+    // common text/ *
+    PLAIN, "plain";
+    HTML, "html";
+    XML, "xml";
+    JAVASCRIPT, "javascript";
+    CSS, "css";
+    CSV, "csv";
+    EVENT_STREAM, "event-stream";
+    VCARD, "vcard";
+
+    // common application/*
+    JSON, "json";
+    WWW_FORM_URLENCODED, "x-www-form-urlencoded";
+    MSGPACK, "msgpack";
+    OCTET_STREAM, "octet-stream";
+    PDF, "pdf";
+
+    // common font/*
+    WOFF, "woff";
+    WOFF2, "woff2";
+
+    // multipart/*
+    FORM_DATA, "form-data";
+
+    // common image/*
+    BMP, "bmp";
+    GIF, "gif";
+    JPEG, "jpeg";
+    PNG, "png";
+    SVG, "svg";
+
+    // audio/*
+    BASIC, "basic";
+    MPEG, "mpeg";
+    MP4, "mp4";
+    OGG, "ogg";
+
+    // parameters
+    CHARSET, "charset";
+    BOUNDARY, "boundary";
+    UTF_8, "utf-8";
+}
+
+macro_rules! mimes {
+    ($($id:ident, $($piece:expr),*;)*) => (
+        #[allow(non_camel_case_types)]
+        enum __Atoms {
+            __Dynamic,
+        $(
+            $id,
+        )*
+        }
+
+        $(
+            mime_constant! {
+                $id, $($piece),*
+            }
+        )*
+
+        #[test]
+        fn test_mimes_macro_consts() {
+            let _ = [
+            $(
+            mime_constant_test! {
+                $id, $($piece),*
+            }
+            ),*
+            ].iter().enumerate().map(|(pos, &atom)| {
+                assert_eq!(pos + 1, atom as usize, "atom {} in position {}", atom, pos + 1);
+            }).collect::<Vec<()>>();
+        }
+    )
+}
+
+macro_rules! mime_constant {
+    ($id:ident, $src:expr, $slash:expr) => (
+        mime_constant!($id, $src, $slash, None);
+    );
+    ($id:ident, $src:expr, $slash:expr, $plus:expr) => (
+        mime_constant!(FULL $id, $src, $slash, $plus, ParamSource::None);
+    );
+
+    ($id:ident, $src:expr, $slash:expr, $plus:expr, $params:expr) => (
+        mime_constant!(FULL $id, $src, $slash, $plus, ParamSource::Utf8($params));
+    );
+
+
+    (FULL $id:ident, $src:expr, $slash:expr, $plus:expr, $params:expr) => (
+        #[doc = "`"]
+        #[doc = $src]
+        #[doc = "`"]
+        pub const $id: Mime = Mime {
+            source: Source::Atom(__Atoms::$id as u8, $src),
+            slash: $slash,
+            plus: $plus,
+            params: $params,
+        };
+    )
+}
+
+
+#[cfg(test)]
+macro_rules! mime_constant_test {
+    ($id:ident, $src:expr, $slash:expr) => (
+        mime_constant_test!($id, $src, $slash, None);
+    );
+    ($id:ident, $src:expr, $slash:expr, $plus:expr) => (
+        mime_constant_test!(FULL $id, $src, $slash, $plus, ParamSource::None);
+    );
+
+    ($id:ident, $src:expr, $slash:expr, $plus:expr, $params:expr) => (
+        mime_constant_test!(FULL $id, $src, $slash, $plus, ParamSource::Utf8($params));
+    );
+
+    (FULL $id:ident, $src:expr, $slash:expr, $plus:expr, $params:expr) => ({
+        let __mime = $id;
+        let __slash = __mime.as_ref().as_bytes()[$slash];
+        assert_eq!(__slash, b'/', "{:?} has {:?} at slash position {:?}", __mime, __slash as char, $slash);
+        if let Some(plus) = __mime.plus {
+            let __c = __mime.as_ref().as_bytes()[plus];
+            assert_eq!(__c, b'+', "{:?} has {:?} at plus position {:?}", __mime, __c as char, plus);
+        } else {
+            assert!(!__mime.as_ref().as_bytes().contains(&b'+'), "{:?} forgot plus", __mime);
+        }
+        if let ParamSource::Utf8(semicolon) = __mime.params {
+            assert_eq!(__mime.as_ref().as_bytes()[semicolon], b';');
+            assert_eq!(&__mime.as_ref()[semicolon..], "; charset=utf-8");
+        } else if let ParamSource::None = __mime.params {
+            assert!(!__mime.as_ref().as_bytes().contains(&b';'));
+        } else {
+            unreachable!();
+        }
+        __mime.atom()
+    })
+}
+
+
+mimes! {
+    STAR_STAR, "*/*", 1;
+
+    TEXT_STAR, "text/*", 4;
+    TEXT_PLAIN, "text/plain", 4;
+    TEXT_PLAIN_UTF_8, "text/plain; charset=utf-8", 4, None, 10;
+    TEXT_HTML, "text/html", 4;
+    TEXT_HTML_UTF_8, "text/html; charset=utf-8", 4, None, 9;
+    TEXT_CSS, "text/css", 4;
+    TEXT_CSS_UTF_8, "text/css; charset=utf-8", 4, None, 8;
+    TEXT_JAVASCRIPT, "text/javascript", 4;
+    TEXT_XML, "text/xml", 4;
+    TEXT_EVENT_STREAM, "text/event-stream", 4;
+    TEXT_CSV, "text/csv", 4;
+    TEXT_CSV_UTF_8, "text/csv; charset=utf-8", 4, None, 8;
+    TEXT_TAB_SEPARATED_VALUES, "text/tab-separated-values", 4;
+    TEXT_TAB_SEPARATED_VALUES_UTF_8, "text/tab-separated-values; charset=utf-8", 4, None, 25;
+    TEXT_VCARD, "text/vcard", 4;
+
+    IMAGE_STAR, "image/*", 5;
+    IMAGE_JPEG, "image/jpeg", 5;
+    IMAGE_GIF, "image/gif", 5;
+    IMAGE_PNG, "image/png", 5;
+    IMAGE_BMP, "image/bmp", 5;
+    IMAGE_SVG, "image/svg+xml", 5, Some(9);
+
+    FONT_WOFF, "font/woff", 4;
+    FONT_WOFF2, "font/woff2", 4;
+
+    APPLICATION_JSON, "application/json", 11;
+    APPLICATION_JAVASCRIPT, "application/javascript", 11;
+    APPLICATION_JAVASCRIPT_UTF_8, "application/javascript; charset=utf-8", 11, None, 22;
+    APPLICATION_WWW_FORM_URLENCODED, "application/x-www-form-urlencoded", 11;
+    APPLICATION_OCTET_STREAM, "application/octet-stream", 11;
+    APPLICATION_MSGPACK, "application/msgpack", 11;
+    APPLICATION_PDF, "application/pdf", 11;
+
+    MULTIPART_FORM_DATA, "multipart/form-data", 9;
+}
+
+#[deprecated(since="0.3.1", note="please use `TEXT_JAVASCRIPT` instead")]
+#[doc(hidden)]
+pub const TEXT_JAVSCRIPT: Mime = TEXT_JAVASCRIPT;
+
+
+#[cfg(test)]
+mod tests {
+    use std::str::FromStr;
+    use super::*;
+
+    #[test]
+    fn test_type_() {
+        assert_eq!(TEXT_PLAIN.type_(), TEXT);
+    }
+
+
+    #[test]
+    fn test_subtype() {
+        assert_eq!(TEXT_PLAIN.subtype(), PLAIN);
+        assert_eq!(TEXT_PLAIN_UTF_8.subtype(), PLAIN);
+        let mime = Mime::from_str("text/html+xml").unwrap();
+        assert_eq!(mime.subtype(), HTML);
+    }
+
+    #[test]
+    fn test_matching() {
+        match (TEXT_PLAIN.type_(), TEXT_PLAIN.subtype()) {
+            (TEXT, PLAIN) => (),
+            _ => unreachable!(),
+        }
+    }
+
+    #[test]
+    fn test_suffix() {
+        assert_eq!(TEXT_PLAIN.suffix(), None);
+        let mime = Mime::from_str("text/html+xml").unwrap();
+        assert_eq!(mime.suffix(), Some(XML));
+    }
+
+    #[test]
+    fn test_mime_fmt() {
+        let mime = TEXT_PLAIN;
+        assert_eq!(mime.to_string(), "text/plain");
+        let mime = TEXT_PLAIN_UTF_8;
+        assert_eq!(mime.to_string(), "text/plain; charset=utf-8");
+    }
+
+    #[test]
+    fn test_mime_from_str() {
+        assert_eq!(Mime::from_str("text/plain").unwrap(), TEXT_PLAIN);
+        assert_eq!(Mime::from_str("TEXT/PLAIN").unwrap(), TEXT_PLAIN);
+        assert_eq!(Mime::from_str("text/plain;charset=utf-8").unwrap(), TEXT_PLAIN_UTF_8);
+        assert_eq!(Mime::from_str("text/plain;charset=\"utf-8\"").unwrap(), TEXT_PLAIN_UTF_8);
+
+        // spaces
+        assert_eq!(Mime::from_str("text/plain; charset=utf-8").unwrap(), TEXT_PLAIN_UTF_8);
+
+        // quotes + semi colon
+        Mime::from_str("text/plain;charset=\"utf-8\"; foo=bar").unwrap();
+        Mime::from_str("text/plain;charset=\"utf-8\" ; foo=bar").unwrap();
+
+        let upper = Mime::from_str("TEXT/PLAIN").unwrap();
+        assert_eq!(upper, TEXT_PLAIN);
+        assert_eq!(upper.type_(), TEXT);
+        assert_eq!(upper.subtype(), PLAIN);
+
+
+        let extended = Mime::from_str("TEXT/PLAIN; CHARSET=UTF-8; FOO=BAR").unwrap();
+        assert_eq!(extended, "text/plain; charset=utf-8; foo=BAR");
+        assert_eq!(extended.get_param("charset").unwrap(), "utf-8");
+        assert_eq!(extended.get_param("foo").unwrap(), "BAR");
+
+        Mime::from_str("multipart/form-data; boundary=--------foobar").unwrap();
+
+        // stars
+        assert_eq!("*/*".parse::<Mime>().unwrap(), STAR_STAR);
+        assert_eq!("image/*".parse::<Mime>().unwrap(), "image/*");
+        assert_eq!("text/*; charset=utf-8".parse::<Mime>().unwrap(), "text/*; charset=utf-8");
+
+        // parse errors
+        Mime::from_str("f o o / bar").unwrap_err();
+        Mime::from_str("text\n/plain").unwrap_err();
+        Mime::from_str("text\r/plain").unwrap_err();
+        Mime::from_str("text/\r\nplain").unwrap_err();
+        Mime::from_str("text/plain;\r\ncharset=utf-8").unwrap_err();
+        Mime::from_str("text/plain; charset=\r\nutf-8").unwrap_err();
+        Mime::from_str("text/plain; charset=\"\r\nutf-8\"").unwrap_err();
+    }
+
+    #[test]
+    fn test_mime_from_str_empty_parameter_list() {
+        static CASES: &'static [&'static str] = &[
+            "text/event-stream;",
+            "text/event-stream; ",
+            "text/event-stream;       ",
+        ];
+
+        for case in CASES {
+            let mime = Mime::from_str(case).expect(case);
+            assert_eq!(mime, TEXT_EVENT_STREAM, "case = {:?}", case);
+            assert_eq!(mime.type_(), TEXT, "case = {:?}", case);
+            assert_eq!(mime.subtype(), EVENT_STREAM, "case = {:?}", case);
+            assert!(!mime.has_params(), "case = {:?}", case);
+        }
+
+    }
+
+    #[test]
+    fn test_case_sensitive_values() {
+        let mime = Mime::from_str("multipart/form-data; charset=BASE64; boundary=ABCDEFG").unwrap();
+        assert_eq!(mime.get_param(CHARSET).unwrap(), "bAsE64");
+        assert_eq!(mime.get_param(BOUNDARY).unwrap(), "ABCDEFG");
+        assert_ne!(mime.get_param(BOUNDARY).unwrap(), "abcdefg");
+    }
+
+    #[test]
+    fn test_get_param() {
+        assert_eq!(TEXT_PLAIN.get_param("charset"), None);
+        assert_eq!(TEXT_PLAIN.get_param("baz"), None);
+
+        assert_eq!(TEXT_PLAIN_UTF_8.get_param("charset"), Some(UTF_8));
+        assert_eq!(TEXT_PLAIN_UTF_8.get_param("baz"), None);
+
+        let mime = Mime::from_str("text/plain; charset=utf-8; foo=bar").unwrap();
+        assert_eq!(mime.get_param(CHARSET).unwrap(), "utf-8");
+        assert_eq!(mime.get_param("foo").unwrap(), "bar");
+        assert_eq!(mime.get_param("baz"), None);
+
+
+        let mime = Mime::from_str("text/plain;charset=\"utf-8\"").unwrap();
+        assert_eq!(mime.get_param(CHARSET), Some(UTF_8));
+    }
+
+    #[test]
+    fn test_name_eq() {
+        assert_eq!(TEXT, TEXT);
+        assert_eq!(TEXT, "text");
+        assert_eq!("text", TEXT);
+        assert_eq!(TEXT, "TEXT");
+
+        let param = Name {
+            source: "ABC",
+            insensitive: false,
+        };
+
+        assert_eq!(param, param);
+        assert_eq!(param, "ABC");
+        assert_eq!("ABC", param);
+        assert_ne!(param, "abc");
+        assert_ne!("abc", param);
+    }
+
+    #[test]
+    fn test_essence_str() {
+        assert_eq!(TEXT_PLAIN.essence_str(), "text/plain");
+        assert_eq!(TEXT_PLAIN_UTF_8.essence_str(), "text/plain");
+        assert_eq!(IMAGE_SVG.essence_str(), "image/svg+xml");
+    }
+}
diff --git a/third_party/rust/mime/src/parse.rs b/third_party/rust/mime/src/parse.rs
new file mode 100644
index 0000000000..d55e5494cb
--- /dev/null
+++ b/third_party/rust/mime/src/parse.rs
@@ -0,0 +1,363 @@
+#[allow(unused, deprecated)]
+use std::ascii::AsciiExt;
+use std::error::Error;
+use std::fmt;
+use std::iter::Enumerate;
+use std::str::Bytes;
+
+use super::{Mime, Source, ParamSource, Indexed, CHARSET, UTF_8};
+
+#[derive(Debug)]
+pub enum ParseError {
+    MissingSlash,
+    MissingEqual,
+    MissingQuote,
+    InvalidToken {
+        pos: usize,
+        byte: u8,
+    },
+}
+
+impl ParseError {
+    fn s(&self) -> &str {
+        use self::ParseError::*;
+
+        match *self {
+            MissingSlash => "a slash (/) was missing between the type and subtype",
+            MissingEqual => "an equals sign (=) was missing between a parameter and its value",
+            MissingQuote => "a quote (\") was missing from a parameter value",
+            InvalidToken { .. } => "an invalid token was encountered",
+        }
+    }
+}
+
+impl fmt::Display for ParseError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        if let ParseError::InvalidToken { pos, byte } = *self {
+            write!(f, "{}, {:X} at position {}", self.s(), byte, pos)
+        } else {
+            f.write_str(self.s())
+        }
+    }
+}
+
+impl Error for ParseError {
+    // Minimum Rust is 1.15, Error::description was still required then
+    #[allow(deprecated)]
+    fn description(&self) -> &str {
+        self.s()
+    }
+}
+
+pub fn parse(s: &str) -> Result<Mime, ParseError> {
+    if s == "*/*" {
+        return Ok(::STAR_STAR);
+    }
+
+    let mut iter = s.bytes().enumerate();
+    // toplevel
+    let mut start;
+    let slash;
+    loop {
+        match iter.next() {
+            Some((_, c)) if is_token(c) => (),
+            Some((i, b'/')) if i > 0 => {
+                slash = i;
+                start = i + 1;
+                break;
+            },
+            None => return Err(ParseError::MissingSlash), // EOF and no toplevel is no Mime
+            Some((pos, byte)) => return Err(ParseError::InvalidToken {
+                pos: pos,
+                byte: byte,
+            })
+        };
+
+    }
+
+    // sublevel
+    let mut plus = None;
+    loop {
+        match iter.next() {
+            Some((i, b'+')) if i > start => {
+                plus = Some(i);
+            },
+            Some((i, b';')) if i > start => {
+                start = i;
+                break;
+            },
+            Some((_, c)) if is_token(c) => (),
+            None => {
+                return Ok(Mime {
+                    source: Source::Dynamic(s.to_ascii_lowercase()),
+                    slash: slash,
+                    plus: plus,
+                    params: ParamSource::None,
+                });
+            },
+            Some((pos, byte)) => return Err(ParseError::InvalidToken {
+                pos: pos,
+                byte: byte,
+            })
+        };
+    }
+
+    // params
+    let params = params_from_str(s, &mut iter, start)?;
+
+    let src = match params {
+        ParamSource::Utf8(_)  => s.to_ascii_lowercase(),
+        ParamSource::Custom(semicolon, ref indices) => lower_ascii_with_params(s, semicolon, indices),
+        ParamSource::None => {
+            // Chop off the empty list
+            s[..start].to_ascii_lowercase()
+        }
+    };
+
+    Ok(Mime {
+        source: Source::Dynamic(src),
+        slash: slash,
+        plus: plus,
+        params: params,
+    })
+}
+
+
+fn params_from_str(s: &str, iter: &mut Enumerate<Bytes>, mut start: usize) -> Result<ParamSource, ParseError> {
+    let semicolon = start;
+    start += 1;
+    let mut params = ParamSource::None;
+    'params: while start < s.len() {
+        let name;
+        // name
+        'name: loop {
+            match iter.next() {
+                Some((i, b' ')) if i == start => {
+                    start = i + 1;
+                    continue 'params;
+                },
+                Some((_, c)) if is_token(c) => (),
+                Some((i, b'=')) if i > start => {
+                    name = Indexed(start, i);
+                    start = i + 1;
+                    break 'name;
+                },
+                None => return Err(ParseError::MissingEqual),
+                Some((pos, byte)) => return Err(ParseError::InvalidToken {
+                    pos: pos,
+                    byte: byte,
+                }),
+            }
+        }
+
+        let value;
+        // values must be restrict-name-char or "anything goes"
+        let mut is_quoted = false;
+
+        'value: loop {
+            if is_quoted {
+                match iter.next() {
+                    Some((i, b'"')) if i > start => {
+                        value = Indexed(start, i);
+                        break 'value;
+                    },
+                    Some((_, c)) if is_restricted_quoted_char(c) => (),
+                    None => return Err(ParseError::MissingQuote),
+                    Some((pos, byte)) => return Err(ParseError::InvalidToken {
+                        pos: pos,
+                        byte: byte,
+                    }),
+                }
+            } else {
+                match iter.next() {
+                    Some((i, b'"')) if i == start => {
+                        is_quoted = true;
+                        start = i + 1;
+                    },
+                    Some((_, c)) if is_token(c) => (),
+                    Some((i, b';')) if i > start => {
+                        value = Indexed(start, i);
+                        start = i + 1;
+                        break 'value;
+                    }
+                    None => {
+                        value = Indexed(start, s.len());
+                        start = s.len();
+                        break 'value;
+                    },
+
+                    Some((pos, byte)) => return Err(ParseError::InvalidToken {
+                        pos: pos,
+                        byte: byte,
+                    }),
+                }
+            }
+        }
+
+        if is_quoted {
+            'ws: loop {
+                match iter.next() {
+                    Some((i, b';')) => {
+                        // next param
+                        start = i + 1;
+                        break 'ws;
+                    },
+                    Some((_, b' ')) => {
+                        // skip whitespace
+                    },
+                    None => {
+                        // eof
+                        start = s.len();
+                        break 'ws;
+                    },
+                    Some((pos, byte)) => return Err(ParseError::InvalidToken {
+                        pos: pos,
+                        byte: byte,
+                    }),
+                }
+            }
+        }
+
+        match params {
+            ParamSource::Utf8(i) => {
+                let i = i + 2;
+                let charset = Indexed(i, "charset".len() + i);
+                let utf8 = Indexed(charset.1 + 1, charset.1 + "utf-8".len() + 1);
+                params = ParamSource::Custom(semicolon, vec![
+                    (charset, utf8),
+                    (name, value),
+                ]);
+            },
+            ParamSource::Custom(_, ref mut vec) => {
+                vec.push((name, value));
+            },
+            ParamSource::None => {
+                if semicolon + 2 == name.0 && CHARSET == &s[name.0..name.1] {
+                    if UTF_8 == &s[value.0..value.1] {
+                        params = ParamSource::Utf8(semicolon);
+                        continue 'params;
+                    }
+                }
+                params = ParamSource::Custom(semicolon, vec![(name, value)]);
+            },
+        }
+    }
+    Ok(params)
+}
+
+fn lower_ascii_with_params(s: &str, semi: usize, params: &[(Indexed, Indexed)]) -> String {
+    let mut owned = s.to_owned();
+    owned[..semi].make_ascii_lowercase();
+
+    for &(ref name, ref value) in params {
+        owned[name.0..name.1].make_ascii_lowercase();
+        // Since we just converted this part of the string to lowercase,
+        // we can skip the `Name == &str` unicase check and do a faster
+        // memcmp instead.
+        if &owned[name.0..name.1] == CHARSET.source {
+            owned[value.0..value.1].make_ascii_lowercase();
+        }
+    }
+
+    owned
+}
+
+// From [RFC6838](http://tools.ietf.org/html/rfc6838#section-4.2):
+//
+// > All registered media types MUST be assigned top-level type and
+// > subtype names.  The combination of these names serves to uniquely
+// > identify the media type, and the subtype name facet (or the absence
+// > of one) identifies the registration tree.  Both top-level type and
+// > subtype names are case-insensitive.
+// >
+// > Type and subtype names MUST conform to the following ABNF:
+// >
+// >     type-name = restricted-name
+// >     subtype-name = restricted-name
+// >
+// >     restricted-name = restricted-name-first *126restricted-name-chars
+// >     restricted-name-first  = ALPHA / DIGIT
+// >     restricted-name-chars  = ALPHA / DIGIT / "!" / "#" /
+// >                              "$" / "&" / "-" / "^" / "_"
+// >     restricted-name-chars =/ "." ; Characters before first dot always
+// >                                  ; specify a facet name
+// >     restricted-name-chars =/ "+" ; Characters after last plus always
+// >                                  ; specify a structured syntax suffix
+
+// However, [HTTP](https://tools.ietf.org/html/rfc7231#section-3.1.1.1):
+//
+// >     media-type = type "/" subtype *( OWS ";" OWS parameter )
+// >     type       = token
+// >     subtype    = token
+// >     parameter  = token "=" ( token / quoted-string )
+//
+// Where token is defined as:
+//
+// >     token = 1*tchar
+// >     tchar = "!" / "#" / "$" / "%" / "&" / "'" / "*" / "+" / "-" / "." /
+// >        "^" / "_" / "`" / "|" / "~" / DIGIT / ALPHA
+//
+// So, clearly, ¯\_(Ä_/¯
+
+macro_rules! byte_map {
+    ($($flag:expr,)*) => ([
+        $($flag != 0,)*
+    ])
+}
+
+static TOKEN_MAP: [bool; 256] = byte_map![
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 1, 0, 1, 1, 1, 1, 1, 0, 0, 1, 1, 0, 1, 1, 0,
+    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0,
+    0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1,
+    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+];
+
+fn is_token(c: u8) -> bool {
+    TOKEN_MAP[c as usize]
+}
+
+fn is_restricted_quoted_char(c: u8) -> bool {
+    c > 31 && c != 127
+}
+
+#[test]
+#[allow(warnings)] // ... ranges deprecated
+fn test_lookup_tables() {
+    for (i, &valid) in TOKEN_MAP.iter().enumerate() {
+        let i = i as u8;
+        let should = match i {
+            b'a'...b'z' |
+            b'A'...b'Z' |
+            b'0'...b'9' |
+            b'!' |
+            b'#' |
+            b'$' |
+            b'%' |
+            b'&' |
+            b'\'' |
+            b'*' |
+            b'+' |
+            b'-' |
+            b'.' |
+            b'^' |
+            b'_' |
+            b'`' |
+            b'|' |
+            b'~' => true,
+            _ => false
+        };
+        assert_eq!(valid, should, "{:?} ({}) should be {}", i as char, i, should);
+    }
+}