Implement `URL.canParse` (#5463)

Co-authored-by: Jarred Sumner <709451+Jarred-Sumner@users.noreply.github.com>

3 files changed, 41 insertions, 2 deletions

diff --git a/src/bun.js/bindings/DOMURL.cpp b/src/bun.js/bindings/DOMURL.cpp
index 31381b867..9b5893a35 100644
--- a/src/bun.js/bindings/DOMURL.cpp
+++ b/src/bun.js/bindings/DOMURL.cpp
@@ -42,6 +42,17 @@ inline DOMURL::DOMURL(URL&& completeURL, const URL& baseURL)
 {
 }
 
+DOMURL::~DOMURL() = default;
+
+bool DOMURL::canParse(const String& url, const String& base)
+{
+    URL baseURL { base };
+    if (!base.isNull() && !baseURL.isValid())
+        return false;
+    URL completeURL { baseURL, url };
+    return completeURL.isValid();
+}
+
 ExceptionOr<Ref<DOMURL>> DOMURL::create(const String& url, const URL& base)
 {
     ASSERT(base.isValid() || base.isNull());
@@ -64,8 +75,6 @@ ExceptionOr<Ref<DOMURL>> DOMURL::create(const String& url, const DOMURL& base)
     return create(url, base.href());
 }
 
-DOMURL::~DOMURL() = default;
-
 ExceptionOr<void> DOMURL::setHref(const String& url)
 {
     URL completeURL { URL {}, url };
diff --git a/src/bun.js/bindings/DOMURL.h b/src/bun.js/bindings/DOMURL.h
index 0a6210690..0f19510b6 100644
--- a/src/bun.js/bindings/DOMURL.h
+++ b/src/bun.js/bindings/DOMURL.h
@@ -43,6 +43,7 @@ public:
     static ExceptionOr<Ref<DOMURL>> create(const String& url, const DOMURL& base);
     ~DOMURL();
 
+    static bool canParse(const String& url, const String& base);
     const URL& href() const { return m_url; }
     ExceptionOr<void> setHref(const String&);
     void setQuery(const String&);
diff --git a/src/bun.js/bindings/webcore/JSDOMURL.cpp b/src/bun.js/bindings/webcore/JSDOMURL.cpp
index 747154bed..3f99fc2b7 100644
--- a/src/bun.js/bindings/webcore/JSDOMURL.cpp
+++ b/src/bun.js/bindings/webcore/JSDOMURL.cpp
@@ -64,6 +64,7 @@ using namespace JSC;
 static JSC_DECLARE_HOST_FUNCTION(jsDOMURLPrototypeFunction_toJSON);
 static JSC_DECLARE_HOST_FUNCTION(jsDOMURLConstructorFunction_createObjectURL);
 static JSC_DECLARE_HOST_FUNCTION(jsDOMURLConstructorFunction_revokeObjectURL);
+static JSC_DECLARE_HOST_FUNCTION(jsDOMURLConstructorFunction_canParse);
 static JSC_DECLARE_HOST_FUNCTION(jsDOMURLPrototypeFunction_toString);
 
 // Attributes
@@ -131,6 +132,7 @@ using JSDOMURLDOMConstructor = JSDOMConstructor<JSDOMURL>;
 static const HashTableValue JSDOMURLConstructorTableValues[] = {
     { "createObjectURL"_s, static_cast<unsigned>(JSC::PropertyAttribute::Function), NoIntrinsic, { HashTableValue::NativeFunctionType, jsDOMURLConstructorFunction_createObjectURL, 1 } },
     { "revokeObjectURL"_s, static_cast<unsigned>(JSC::PropertyAttribute::Function), NoIntrinsic, { HashTableValue::NativeFunctionType, jsDOMURLConstructorFunction_revokeObjectURL, 1 } },
+    { "canParse"_s, static_cast<unsigned>(JSC::PropertyAttribute::Function), NoIntrinsic, { HashTableValue::NativeFunctionType, jsDOMURLConstructorFunction_canParse, 2 } },
 };
 
 static inline EncodedJSValue constructJSDOMURL1(JSGlobalObject* lexicalGlobalObject, CallFrame* callFrame)
@@ -688,6 +690,33 @@ JSC_DEFINE_HOST_FUNCTION(jsDOMURLConstructorFunction_revokeObjectURL, (JSGlobalO
     return IDLOperation<JSDOMURL>::callStatic<jsDOMURLConstructorFunction_revokeObjectURLBody>(*lexicalGlobalObject, *callFrame, "revokeObjectURL");
 }
 
+static inline JSC::EncodedJSValue jsDOMURLConstructorFunction_canParseBody(JSC::JSGlobalObject* lexicalGlobalObject, JSC::CallFrame* callFrame)
+{
+    auto& vm = JSC::getVM(lexicalGlobalObject);
+    auto throwScope = DECLARE_THROW_SCOPE(vm);
+
+    if (UNLIKELY(callFrame->argumentCount() < 1))
+        return throwVMError(lexicalGlobalObject, throwScope, createNotEnoughArgumentsError(lexicalGlobalObject));
+
+    EnsureStillAliveScope argument0 = callFrame->uncheckedArgument(0);
+    auto url = convert<IDLUSVString>(*lexicalGlobalObject, argument0.value());
+    RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
+
+    EnsureStillAliveScope argument1 = callFrame->argument(1);
+    String base;
+    if (!argument1.value().isUndefinedOrNull()) {
+        base = convert<IDLUSVString>(*lexicalGlobalObject, argument1.value());
+        RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
+    }
+
+    return JSValue::encode(jsBoolean(DOMURL::canParse(url, base)));
+}
+
+JSC_DEFINE_HOST_FUNCTION(jsDOMURLConstructorFunction_canParse, (JSGlobalObject * lexicalGlobalObject, CallFrame* callFrame))
+{
+    return IDLOperation<JSDOMURL>::callStatic<jsDOMURLConstructorFunction_canParseBody>(*lexicalGlobalObject, *callFrame, "canParse");
+}
+
 #if ENABLE(MEDIA_SOURCE)
 static inline JSC::EncodedJSValue jsDOMURLConstructorFunction_createObjectURL2Body(JSC::JSGlobalObject* lexicalGlobalObject, JSC::CallFrame* callFrame)
 {