do not rely on UWP URL parser

ports/libsimpleservo/api/src/lib.rs

@@ -152,6 +152,12 @@ pub fn servo_version() -> String {
     servo::config::servo_version()
 }
 
+/// Test if a url is valid.
+pub fn is_uri_valid(url: &str) -> bool {
+    info!("load_uri: {}", url);
+    ServoUrl::parse(url).is_ok()
+}
+
 /// Initialize Servo. At that point, we need a valid GL context.
 /// In the future, this will be done in multiple steps.
 pub fn init(

ports/libsimpleservo/capi/src/lib.rs

@@ -186,16 +186,17 @@ fn do_redirect_stdout_stderr() -> Result<(), ()> {
     Ok(())
 }
 
-fn call<F>(f: F)
+fn call<T, F>(f: F) -> T
 where
-    F: Fn(&mut ServoGlue) -> Result<(), &'static str>,
+    F: Fn(&mut ServoGlue) -> Result<T, &'static str>,
 {
-    if let Err(e) = SERVO.with(|s| match s.borrow_mut().as_mut() {
+    match SERVO.with(|s| match s.borrow_mut().as_mut() {
         Some(ref mut s) => (f)(s),
         None => Err("Servo not available in this thread"),
     }) {
-        panic!(e);
-    };
+        Err(e) => panic!(e),
+        Ok(r) => r,
+    }
 }
 
 /// Callback used by Servo internals
@@ -430,13 +431,23 @@ pub extern "C" fn perform_updates() {
 }
 
 #[no_mangle]
-pub extern "C" fn load_uri(url: *const c_char) {
+pub extern "C" fn is_uri_valid(url: *const c_char) -> bool {
+    catch_any_panic(|| {
+        debug!("is_uri_valid");
+        let url = unsafe { CStr::from_ptr(url) };
+        let url = url.to_str().expect("Can't read string");
+        simpleservo::is_uri_valid(url)
+    })
+}
+
+#[no_mangle]
+pub extern "C" fn load_uri(url: *const c_char) -> bool {
     catch_any_panic(|| {
         debug!("load_url");
         let url = unsafe { CStr::from_ptr(url) };
         let url = url.to_str().expect("Can't read string");
-        call(|s| s.load_uri(url));
-    });
+        call(|s| Ok(s.load_uri(url).is_ok()))
+    })
 }
 
 #[no_mangle]

support/hololens/ServoApp/BrowserPage.cpp

@@ -116,7 +116,7 @@ void BrowserPage::OnURLEdited(IInspectable const &,
     servoControl().Focus(FocusState::Programmatic);
     auto input = urlTextbox().Text();
     auto uri = servoControl().LoadURIOrSearch(input);
-    urlTextbox().Text(uri.ToString());
+    urlTextbox().Text(uri);
   }
 }
 

support/hololens/ServoApp/ServoControl/Servo.h

@@ -66,7 +66,10 @@ public:
 
   void Reload() { capi::reload(); }
   void Stop() { capi::stop(); }
-  void LoadUri(hstring uri) { capi::load_uri(*hstring2char(uri)); }
+  bool LoadUri(hstring uri) { return capi::load_uri(*hstring2char(uri)); }
+  bool IsUriValid(hstring uri) {
+    return capi::is_uri_valid(*hstring2char(uri));
+  }
   void Scroll(float dx, float dy, float x, float y) {
     capi::scroll((int32_t)dx, (int32_t)dy, (int32_t)x, (int32_t)y);
   }

support/hololens/ServoApp/ServoControl/ServoControl.cpp

@@ -195,25 +195,43 @@ void ServoControl::Reload() {
 void ServoControl::Stop() {
   RunOnGLThread([=] { mServo->Stop(); });
 }
-Uri ServoControl::LoadURIOrSearch(hstring input) {
-  auto uri = TryParseURI(input);
-  if (uri == std::nullopt) {
+hstring ServoControl::LoadURIOrSearch(hstring input) {
+  // Initial input is valid
+  if (mServo->IsUriValid(input)) {
+    TryLoadUri(input);
+    return input;
+  }
+
+  // Not valid. Maybe it's just missing the scheme.
+  hstring with_scheme = L"https://" + input;
+  // If the user only types "mozilla" we don't want to go to
+  // https://mozilla even though it's a valid url.
   bool has_dot = wcsstr(input.c_str(), L".") != nullptr;
-    hstring input2 = L"https://" + input;
-    uri = TryParseURI(input2);
-    if (uri == std::nullopt || !has_dot) {
-      hstring input3 =
+  if (mServo->IsUriValid(with_scheme) && has_dot) {
+    TryLoadUri(with_scheme);
+    return with_scheme;
+  }
+
+  // Doesn't look like a URI. Let's search for the string.
+  hstring searchUri =
       L"https://duckduckgo.com/html/?q=" + Uri::EscapeComponent(input);
-      uri = TryParseURI(input3);
+  TryLoadUri(searchUri);
+  return searchUri;
 }
-  }
-  auto finalUri = uri.value();
+
+void ServoControl::TryLoadUri(hstring input) {
   if (!mLooping) {
-    mInitialURL = finalUri.ToString();
+    mInitialURL = input;
   } else {
-    RunOnGLThread([=] { mServo->LoadUri(finalUri.ToString()); });
+    RunOnGLThread([=] {
+      if (!mServo->LoadUri(input)) {
+        RunOnUIThread([=] {
+          Windows::UI::Popups::MessageDialog msg{L"URI not valid"};
+          msg.ShowAsync();
+        });
+      }
+    });
   }
-  return finalUri;
 }
 
 void ServoControl::RunOnGLThread(std::function<void()> task) {

support/hololens/ServoApp/ServoControl/ServoControl.h

@@ -14,7 +14,7 @@ struct ServoControl : ServoControlT<ServoControl>, public servo::ServoDelegate {
   void Reload();
   void Stop();
   void Shutdown();
-  Windows::Foundation::Uri LoadURIOrSearch(hstring);
+  hstring LoadURIOrSearch(hstring);
 
   void OnLoaded(IInspectable const &,
                 Windows::UI::Xaml::RoutedEventArgs const &);
@@ -110,14 +110,6 @@ private:
   void StopRenderLoop();
   void Loop();
 
-  std::optional<Windows::Foundation::Uri> TryParseURI(hstring input) {
-    try {
-      return Windows::Foundation::Uri(input);
-    } catch (hresult_invalid_argument const &) {
-      return {};
-    }
-  }
-
   void OnSurfaceTapped(IInspectable const &,
                        Windows::UI::Xaml::Input::TappedRoutedEventArgs const &);
 
@@ -147,6 +139,8 @@ private:
   template <typename Callable> void RunOnUIThread(Callable);
   void RunOnGLThread(std::function<void()>);
 
+  void TryLoadUri(hstring);
+
   std::unique_ptr<servo::Servo> mServo;
   EGLSurface mRenderSurface{EGL_NO_SURFACE};
   OpenGLES mOpenGLES;

support/hololens/ServoApp/ServoControl/ServoControl.idl

@@ -9,7 +9,7 @@ namespace ServoApp {
       void GoForward();
       void Reload();
       void Stop();
-      Windows.Foundation.Uri LoadURIOrSearch(String url);
+      String LoadURIOrSearch(String url);
       void SetTransientMode(Boolean transient);
       void SetArgs(String args);
       void Shutdown();