1 files changed, 121 insertions, 0 deletions
diff --git a/Userland/Libraries/LibWeb/DOM/XMLHttpRequest.cpp b/Userland/Libraries/LibWeb/DOM/XMLHttpRequest.cpp
new file mode 100644
index 0000000000..f085ade4fd
--- /dev/null
+++ b/Userland/Libraries/LibWeb/DOM/XMLHttpRequest.cpp
@@ -0,0 +1,121 @@
+/*
+ * Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <LibJS/Runtime/Function.h>
+#include <LibWeb/Bindings/EventWrapper.h>
+#include <LibWeb/Bindings/EventWrapperFactory.h>
+#include <LibWeb/Bindings/XMLHttpRequestWrapper.h>
+#include <LibWeb/DOM/Document.h>
+#include <LibWeb/DOM/Event.h>
+#include <LibWeb/DOM/EventDispatcher.h>
+#include <LibWeb/DOM/EventListener.h>
+#include <LibWeb/DOM/Window.h>
+#include <LibWeb/DOM/XMLHttpRequest.h>
+#include <LibWeb/HTML/EventNames.h>
+#include <LibWeb/Loader/ResourceLoader.h>
+#include <LibWeb/Origin.h>
+
+namespace Web {
+
+XMLHttpRequest::XMLHttpRequest(DOM::Window& window)
+    : EventTarget(static_cast<Bindings::ScriptExecutionContext&>(window.document()))
+    , m_window(window)
+{
+}
+
+XMLHttpRequest::~XMLHttpRequest()
+{
+}
+
+void XMLHttpRequest::set_ready_state(ReadyState ready_state)
+{
+    // FIXME: call onreadystatechange once we have that
+    m_ready_state = ready_state;
+}
+
+String XMLHttpRequest::response_text() const
+{
+    if (m_response.is_null())
+        return {};
+    return String::copy(m_response);
+}
+
+void XMLHttpRequest::open(const String& method, const String& url)
+{
+    m_method = method;
+    m_url = url;
+    set_ready_state(ReadyState::Opened);
+}
+
+void XMLHttpRequest::send()
+{
+    URL request_url = m_window->document().complete_url(m_url);
+    dbg() << "XHR send from " << m_window->document().url() << " to " << request_url;
+
+    // TODO: Add support for preflight requests to support CORS requests
+    Origin request_url_origin = Origin(request_url.protocol(), request_url.host(), request_url.port());
+
+    if (!m_window->document().origin().is_same(request_url_origin)) {
+        dbg() << "XHR failed to load: Same-Origin Policy violation: " << m_window->document().url() << " may not load " << request_url;
+        auto weak_this = make_weak_ptr();
+        if (!weak_this)
+            return;
+        const_cast<XMLHttpRequest&>(*weak_this).set_ready_state(ReadyState::Done);
+        const_cast<XMLHttpRequest&>(*weak_this).dispatch_event(DOM::Event::create(HTML::EventNames::error));
+        return;
+    }
+
+    // FIXME: in order to properly set ReadyState::HeadersReceived and ReadyState::Loading,
+    // we need to make ResourceLoader give us more detailed updates than just "done" and "error".
+    ResourceLoader::the().load(
+        m_window->document().complete_url(m_url),
+        [weak_this = make_weak_ptr()](auto data, auto&) {
+            if (!weak_this)
+                return;
+            const_cast<XMLHttpRequest&>(*weak_this).m_response = ByteBuffer::copy(data);
+            const_cast<XMLHttpRequest&>(*weak_this).set_ready_state(ReadyState::Done);
+            const_cast<XMLHttpRequest&>(*weak_this).dispatch_event(DOM::Event::create(HTML::EventNames::load));
+        },
+        [weak_this = make_weak_ptr()](auto& error) {
+            if (!weak_this)
+                return;
+            dbg() << "XHR failed to load: " << error;
+            const_cast<XMLHttpRequest&>(*weak_this).set_ready_state(ReadyState::Done);
+            const_cast<XMLHttpRequest&>(*weak_this).dispatch_event(DOM::Event::create(HTML::EventNames::error));
+        });
+}
+
+bool XMLHttpRequest::dispatch_event(NonnullRefPtr<DOM::Event> event)
+{
+    return DOM::EventDispatcher::dispatch(*this, move(event));
+}
+
+Bindings::EventTargetWrapper* XMLHttpRequest::create_wrapper(JS::GlobalObject& global_object)
+{
+    return wrap(global_object, *this);
+}
+
+}