1 files changed, 564 insertions, 0 deletions
diff --git a/netwerk/base/mozurl/src/lib.rs b/netwerk/base/mozurl/src/lib.rs
new file mode 100644
index 0000000000..7b73311e73
--- /dev/null
+++ b/netwerk/base/mozurl/src/lib.rs
@@ -0,0 +1,564 @@
+/* -*- Mode: rust; rust-indent-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+extern crate url;
+use url::quirks;
+use url::{ParseOptions, Position, Url};
+
+extern crate nsstring;
+use nsstring::{nsACString, nsCString};
+
+extern crate nserror;
+use nserror::*;
+
+extern crate xpcom;
+use xpcom::interfaces::mozIThirdPartyUtil;
+use xpcom::{AtomicRefcnt, RefCounted, RefPtr};
+
+extern crate uuid;
+use uuid::Uuid;
+
+use std::fmt::Write;
+use std::marker::PhantomData;
+use std::mem;
+use std::ops;
+use std::ptr;
+use std::str;
+
+extern "C" {
+    fn Gecko_StrictFileOriginPolicy() -> bool;
+}
+
+/// Helper macro. If the expression $e is Ok(t) evaluates to t, otherwise,
+/// returns NS_ERROR_MALFORMED_URI.
+macro_rules! try_or_malformed {
+    ($e:expr) => {
+        match $e {
+            Ok(v) => v,
+            Err(_) => return NS_ERROR_MALFORMED_URI,
+        }
+    };
+}
+
+fn parser<'a>() -> ParseOptions<'a> {
+    Url::options()
+}
+
+fn default_port(scheme: &str) -> Option<u16> {
+    match scheme {
+        "ftp" => Some(21),
+        "gopher" => Some(70),
+        "http" => Some(80),
+        "https" => Some(443),
+        "ws" => Some(80),
+        "wss" => Some(443),
+        "rtsp" => Some(443),
+        "moz-anno" => Some(443),
+        "android" => Some(443),
+        _ => None,
+    }
+}
+
+/// A slice into the backing string. This type is only valid as long as the
+/// MozURL which it was pulled from is valid. In C++, this type implicitly
+/// converts to a nsDependentCString, and is an implementation detail.
+///
+/// This type exists because, unlike &str, this type is safe to return over FFI.
+#[repr(C)]
+pub struct SpecSlice<'a> {
+    data: *const u8,
+    len: u32,
+    _marker: PhantomData<&'a [u8]>,
+}
+
+impl<'a> From<&'a str> for SpecSlice<'a> {
+    fn from(s: &'a str) -> SpecSlice<'a> {
+        assert!(s.len() < u32::max_value() as usize);
+        SpecSlice {
+            data: s.as_ptr(),
+            len: s.len() as u32,
+            _marker: PhantomData,
+        }
+    }
+}
+
+/// The MozURL reference-counted threadsafe URL type. This type intentionally
+/// implements no XPCOM interfaces, and all method calls are non-virtual.
+#[repr(C)]
+pub struct MozURL {
+    pub url: Url,
+    refcnt: AtomicRefcnt,
+}
+
+impl MozURL {
+    pub fn from_url(url: Url) -> RefPtr<MozURL> {
+        // Actually allocate the URL on the heap. This is the only place we actually
+        // create a MozURL, other than in clone().
+        unsafe {
+            RefPtr::from_raw(Box::into_raw(Box::new(MozURL {
+                url: url,
+                refcnt: AtomicRefcnt::new(),
+            })))
+            .unwrap()
+        }
+    }
+}
+
+impl ops::Deref for MozURL {
+    type Target = Url;
+    fn deref(&self) -> &Url {
+        &self.url
+    }
+}
+impl ops::DerefMut for MozURL {
+    fn deref_mut(&mut self) -> &mut Url {
+        &mut self.url
+    }
+}
+
+// Memory Management for MozURL
+#[no_mangle]
+pub unsafe extern "C" fn mozurl_addref(url: &MozURL) {
+    url.refcnt.inc();
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn mozurl_release(url: &MozURL) {
+    let rc = url.refcnt.dec();
+    if rc == 0 {
+        mem::drop(Box::from_raw(url as *const MozURL as *mut MozURL));
+    }
+}
+
+// xpcom::RefPtr support
+unsafe impl RefCounted for MozURL {
+    unsafe fn addref(&self) {
+        mozurl_addref(self);
+    }
+    unsafe fn release(&self) {
+        mozurl_release(self);
+    }
+}
+
+// Allocate a new MozURL object with a RefCnt of 1, and store a pointer to it
+// into url.
+#[no_mangle]
+pub extern "C" fn mozurl_new(
+    result: &mut *const MozURL,
+    spec: &nsACString,
+    base: Option<&MozURL>,
+) -> nsresult {
+    *result = ptr::null_mut();
+
+    let spec = try_or_malformed!(str::from_utf8(spec));
+    let url = if let Some(base) = base {
+        try_or_malformed!(base.url.join(spec))
+    } else {
+        try_or_malformed!(parser().parse(spec))
+    };
+
+    MozURL::from_url(url).forget(result);
+    NS_OK
+}
+
+/// Allocate a new MozURL object which is a clone of the original, and store a
+/// pointer to it into newurl.
+#[no_mangle]
+pub extern "C" fn mozurl_clone(url: &MozURL, newurl: &mut *const MozURL) {
+    MozURL::from_url(url.url.clone()).forget(newurl);
+}
+
+#[no_mangle]
+pub extern "C" fn mozurl_spec(url: &MozURL) -> SpecSlice {
+    url.as_ref().into()
+}
+
+#[no_mangle]
+pub extern "C" fn mozurl_scheme(url: &MozURL) -> SpecSlice {
+    url.scheme().into()
+}
+
+#[no_mangle]
+pub extern "C" fn mozurl_username(url: &MozURL) -> SpecSlice {
+    if url.cannot_be_a_base() {
+        "".into()
+    } else {
+        url.username().into()
+    }
+}
+
+#[no_mangle]
+pub extern "C" fn mozurl_password(url: &MozURL) -> SpecSlice {
+    url.password().unwrap_or("").into()
+}
+
+#[no_mangle]
+pub extern "C" fn mozurl_host(url: &MozURL) -> SpecSlice {
+    url.host_str().unwrap_or("").into()
+}
+
+#[no_mangle]
+pub extern "C" fn mozurl_port(url: &MozURL) -> i32 {
+    // NOTE: Gecko uses -1 to represent the default port.
+    url.port().map(|p| p as i32).unwrap_or(-1)
+}
+
+#[no_mangle]
+pub extern "C" fn mozurl_real_port(url: &MozURL) -> i32 {
+    url.port()
+        .or_else(|| default_port(url.scheme()))
+        .map(|p| p as i32)
+        .unwrap_or(-1)
+}
+
+#[no_mangle]
+pub extern "C" fn mozurl_host_port(url: &MozURL) -> SpecSlice {
+    (&url[Position::BeforeHost..Position::BeforePath]).into()
+}
+
+#[no_mangle]
+pub extern "C" fn mozurl_filepath(url: &MozURL) -> SpecSlice {
+    url.path().into()
+}
+
+#[no_mangle]
+pub extern "C" fn mozurl_path(url: &MozURL) -> SpecSlice {
+    (&url[Position::BeforePath..]).into()
+}
+
+#[no_mangle]
+pub extern "C" fn mozurl_query(url: &MozURL) -> SpecSlice {
+    url.query().unwrap_or("").into()
+}
+
+#[no_mangle]
+pub extern "C" fn mozurl_fragment(url: &MozURL) -> SpecSlice {
+    url.fragment().unwrap_or("").into()
+}
+
+#[no_mangle]
+pub extern "C" fn mozurl_spec_no_ref(url: &MozURL) -> SpecSlice {
+    (&url[..Position::AfterQuery]).into()
+}
+
+#[no_mangle]
+pub extern "C" fn mozurl_has_fragment(url: &MozURL) -> bool {
+    url.fragment().is_some()
+}
+
+#[no_mangle]
+pub extern "C" fn mozurl_directory(url: &MozURL) -> SpecSlice {
+    if let Some(position) = url.path().rfind('/') {
+        url.path()[..position + 1].into()
+    } else {
+        url.path().into()
+    }
+}
+
+#[no_mangle]
+pub extern "C" fn mozurl_prepath(url: &MozURL) -> SpecSlice {
+    (&url[..Position::BeforePath]).into()
+}
+
+fn get_origin(url: &MozURL) -> Option<String> {
+    match url.scheme() {
+        "blob" | "ftp" | "http" | "https" | "ws" | "wss" => {
+            Some(url.origin().ascii_serialization())
+        }
+        "indexeddb" | "moz-extension" | "resource" => {
+            let host = url.host_str().unwrap_or("");
+
+            let port = url.port().or_else(|| default_port(url.scheme()));
+
+            if port == default_port(url.scheme()) {
+                Some(format!("{}://{}", url.scheme(), host))
+            } else {
+                Some(format!("{}://{}:{}", url.scheme(), host, port.unwrap()))
+            }
+        }
+        "file" => {
+            if unsafe { Gecko_StrictFileOriginPolicy() } {
+                Some(url[..Position::AfterPath].to_owned())
+            } else {
+                Some("file://UNIVERSAL_FILE_URI_ORIGIN".to_owned())
+            }
+        }
+        "about" | "moz-safe-about" => Some(url[..Position::AfterPath].to_owned()),
+        _ => None,
+    }
+}
+
+#[no_mangle]
+pub extern "C" fn mozurl_origin(url: &MozURL, origin: &mut nsACString) {
+    let origin_str = if !url.as_ref().starts_with("about:blank") {
+        get_origin(url)
+    } else {
+        None
+    };
+
+    let origin_str = origin_str.unwrap_or_else(|| {
+        // nsIPrincipal stores the uuid, so the same uuid is returned everytime.
+        // We can't do that for MozURL because it can be used across threads.
+        // Storing uuid would mutate the object which would cause races between
+        // threads.
+        format!("moz-nullprincipal:{{{}}}", Uuid::new_v4())
+    });
+
+    // NOTE: Try to re-use the allocation we got from rust-url, and transfer
+    // ownership of the buffer to C++.
+    let mut o = nsCString::from(origin_str);
+    origin.take_from(&mut o);
+}
+
+fn get_base_domain(url: &MozURL) -> Result<Option<String>, nsresult> {
+    match url.scheme() {
+        "ftp" | "http" | "https" | "moz-extension" | "resource" => {
+            let third_party_util: RefPtr<mozIThirdPartyUtil> =
+                xpcom::components::ThirdPartyUtil::service()
+                    .map_err(|_| NS_ERROR_ILLEGAL_DURING_SHUTDOWN)?;
+
+            let scheme = nsCString::from(url.scheme());
+
+            let mut host_str = url.host_str().unwrap_or("");
+
+            if host_str.starts_with('[') && host_str.ends_with(']') {
+                host_str = &host_str[1..host_str.len() - 1];
+            }
+
+            let host = nsCString::from(host_str);
+
+            unsafe {
+                let mut string = nsCString::new();
+                third_party_util
+                    .GetBaseDomainFromSchemeHost(&*scheme, &*host, &mut *string)
+                    .to_result()?;
+
+                // We know that GetBaseDomainFromSchemeHost returns AUTF8String, so just
+                // use unwrap().
+                Ok(Some(String::from_utf8(string.to_vec()).unwrap()))
+            }
+        }
+        "ws" | "wss" => Ok(Some(url.as_ref().to_owned())),
+        "file" => {
+            if unsafe { Gecko_StrictFileOriginPolicy() } {
+                Ok(Some(url.path().to_owned()))
+            } else {
+                Ok(Some("UNIVERSAL_FILE_URI_ORIGIN".to_owned()))
+            }
+        }
+        "about" | "moz-safe-about" | "indexeddb" => Ok(Some(url.as_ref().to_owned())),
+        _ => Ok(None),
+    }
+}
+
+#[no_mangle]
+pub extern "C" fn mozurl_base_domain(url: &MozURL, base_domain: &mut nsACString) -> nsresult {
+    let base_domain_str = if !url.as_ref().starts_with("about:blank") {
+        match get_base_domain(url) {
+            Ok(domain) => domain,
+            Err(rv) => return rv,
+        }
+    } else {
+        None
+    };
+
+    let base_domain_str = base_domain_str.unwrap_or_else(|| {
+        // See the comment in mozurl_origin about why we return a new uuid for
+        // "moz-nullprincipals".
+        format!("{{{}}}", Uuid::new_v4())
+    });
+
+    let mut bd = nsCString::from(base_domain_str);
+    base_domain.take_from(&mut bd);
+
+    NS_OK
+}
+
+// Helper macro for debug asserting that we're the only reference to MozURL.
+macro_rules! debug_assert_mut {
+    ($e:expr) => {
+        debug_assert_eq!($e.refcnt.get(), 1, "Cannot mutate an aliased MozURL!");
+    };
+}
+
+#[no_mangle]
+pub extern "C" fn mozurl_set_scheme(url: &mut MozURL, scheme: &nsACString) -> nsresult {
+    debug_assert_mut!(url);
+    let scheme = try_or_malformed!(str::from_utf8(scheme));
+    try_or_malformed!(quirks::set_protocol(url, scheme));
+    NS_OK
+}
+
+#[no_mangle]
+pub extern "C" fn mozurl_set_username(url: &mut MozURL, username: &nsACString) -> nsresult {
+    debug_assert_mut!(url);
+    let username = try_or_malformed!(str::from_utf8(username));
+    try_or_malformed!(quirks::set_username(url, username));
+    NS_OK
+}
+
+#[no_mangle]
+pub extern "C" fn mozurl_set_password(url: &mut MozURL, password: &nsACString) -> nsresult {
+    debug_assert_mut!(url);
+    let password = try_or_malformed!(str::from_utf8(password));
+    try_or_malformed!(quirks::set_password(url, password));
+    NS_OK
+}
+
+#[no_mangle]
+pub extern "C" fn mozurl_set_host_port(url: &mut MozURL, hostport: &nsACString) -> nsresult {
+    debug_assert_mut!(url);
+    let hostport = try_or_malformed!(str::from_utf8(hostport));
+    try_or_malformed!(quirks::set_host(url, hostport));
+    NS_OK
+}
+
+#[no_mangle]
+pub extern "C" fn mozurl_set_hostname(url: &mut MozURL, host: &nsACString) -> nsresult {
+    debug_assert_mut!(url);
+    let host = try_or_malformed!(str::from_utf8(host));
+    try_or_malformed!(quirks::set_hostname(url, host));
+    NS_OK
+}
+
+#[no_mangle]
+pub extern "C" fn mozurl_set_port_no(url: &mut MozURL, new_port: i32) -> nsresult {
+    debug_assert_mut!(url);
+    if url.cannot_be_a_base() {
+        return NS_ERROR_MALFORMED_URI;
+    }
+
+    let port = match new_port {
+        new if new < 0 || u16::max_value() as i32 <= new => None,
+        new if Some(new as u16) == default_port(url.scheme()) => None,
+        new => Some(new as u16),
+    };
+    try_or_malformed!(url.set_port(port));
+    NS_OK
+}
+
+#[no_mangle]
+pub extern "C" fn mozurl_set_pathname(url: &mut MozURL, path: &nsACString) -> nsresult {
+    debug_assert_mut!(url);
+    let path = try_or_malformed!(str::from_utf8(path));
+    quirks::set_pathname(url, path);
+    NS_OK
+}
+
+#[no_mangle]
+pub extern "C" fn mozurl_set_query(url: &mut MozURL, query: &nsACString) -> nsresult {
+    debug_assert_mut!(url);
+    let query = try_or_malformed!(str::from_utf8(query));
+    quirks::set_search(url, query);
+    NS_OK
+}
+
+#[no_mangle]
+pub extern "C" fn mozurl_set_fragment(url: &mut MozURL, fragment: &nsACString) -> nsresult {
+    debug_assert_mut!(url);
+    let fragment = try_or_malformed!(str::from_utf8(fragment));
+    quirks::set_hash(url, fragment);
+    NS_OK
+}
+
+#[no_mangle]
+pub extern "C" fn mozurl_sizeof(url: &MozURL) -> usize {
+    debug_assert_mut!(url);
+    mem::size_of::<MozURL>() + url.as_str().len()
+}
+
+#[no_mangle]
+pub extern "C" fn mozurl_common_base(
+    url1: &MozURL,
+    url2: &MozURL,
+    result: &mut *const MozURL,
+) -> nsresult {
+    *result = ptr::null();
+    if url1.url == url2.url {
+        RefPtr::new(url1).forget(result);
+        return NS_OK;
+    }
+
+    if url1.scheme() != url2.scheme()
+        || url1.host() != url2.host()
+        || url1.username() != url2.username()
+        || url1.password() != url2.password()
+        || url1.port() != url2.port()
+    {
+        return NS_OK;
+    }
+
+    match (url1.path_segments(), url2.path_segments()) {
+        (Some(path1), Some(path2)) => {
+            // Take the shared prefix of path segments
+            let mut url = url1.url.clone();
+            if let Ok(mut segs) = url.path_segments_mut() {
+                segs.clear();
+                segs.extend(path1.zip(path2).take_while(|&(a, b)| a == b).map(|p| p.0));
+            } else {
+                return NS_OK;
+            }
+
+            MozURL::from_url(url).forget(result);
+            NS_OK
+        }
+        _ => NS_OK,
+    }
+}
+
+#[no_mangle]
+pub extern "C" fn mozurl_relative(
+    url1: &MozURL,
+    url2: &MozURL,
+    result: &mut nsACString,
+) -> nsresult {
+    if url1.url == url2.url {
+        result.truncate();
+        return NS_OK;
+    }
+
+    if url1.scheme() != url2.scheme()
+        || url1.host() != url2.host()
+        || url1.username() != url2.username()
+        || url1.password() != url2.password()
+        || url1.port() != url2.port()
+    {
+        result.assign(url2.as_ref());
+        return NS_OK;
+    }
+
+    match (url1.path_segments(), url2.path_segments()) {
+        (Some(mut path1), Some(mut path2)) => {
+            // Exhaust the part of the iterators that match
+            while let (Some(ref p1), Some(ref p2)) = (path1.next(), path2.next()) {
+                if p1 != p2 {
+                    break;
+                }
+            }
+
+            result.truncate();
+            for _ in path1 {
+                result.append("../");
+            }
+            for p2 in path2 {
+                result.append(p2);
+                result.append("/");
+            }
+        }
+        _ => {
+            result.assign(url2.as_ref());
+        }
+    }
+    NS_OK
+}
+
+/// This type is used by nsStandardURL
+#[no_mangle]
+pub extern "C" fn rusturl_parse_ipv6addr(input: &nsACString, addr: &mut nsACString) -> nsresult {
+    let ip6 = try_or_malformed!(str::from_utf8(input));
+    let host = try_or_malformed!(url::Host::parse(ip6));
+    let _ = write!(addr, "{}", host);
+    NS_OK
+}