Libraries: Move to Userland/Libraries/

Userland/Libraries/LibWeb/HTML/HTMLFormElement.cpp

@@ -0,0 +1,151 @@
+/*
+ * Copyright (c) 2018-2020, 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 <AK/StringBuilder.h>
+#include <LibWeb/HTML/EventNames.h>
+#include <LibWeb/HTML/HTMLFormElement.h>
+#include <LibWeb/HTML/HTMLInputElement.h>
+#include <LibWeb/HTML/SubmitEvent.h>
+#include <LibWeb/InProcessWebView.h>
+#include <LibWeb/Page/Frame.h>
+#include <LibWeb/URLEncoder.h>
+
+namespace Web::HTML {
+
+HTMLFormElement::HTMLFormElement(DOM::Document& document, const QualifiedName& qualified_name)
+    : HTMLElement(document, qualified_name)
+{
+}
+
+HTMLFormElement::~HTMLFormElement()
+{
+}
+
+void HTMLFormElement::submit_form(RefPtr<HTMLElement> submitter, bool from_submit_binding)
+{
+    if (cannot_navigate())
+        return;
+
+    if (action().is_null()) {
+        dbgln("Unsupported form action ''");
+        return;
+    }
+
+    auto effective_method = method().to_lowercase();
+
+    if (effective_method == "dialog") {
+        dbgln("Failed to submit form: Unsupported form method '{}'", method());
+        return;
+    }
+
+    if (effective_method != "get" && effective_method != "post") {
+        effective_method = "get";
+    }
+
+    if (!from_submit_binding) {
+        if (m_firing_submission_events)
+            return;
+
+        m_firing_submission_events = true;
+
+        // FIXME: If the submitter element's no-validate state is false...
+
+        RefPtr<HTMLElement> submitter_button;
+
+        if (submitter != this)
+            submitter_button = submitter;
+
+        auto submit_event = SubmitEvent::create(EventNames::submit, submitter_button);
+        submit_event->set_bubbles(true);
+        submit_event->set_cancelable(true);
+        bool continue_ = dispatch_event(submit_event);
+
+        m_firing_submission_events = false;
+
+        if (!continue_)
+            return;
+
+        // This is checked again because arbitrary JS may have run when handling submit,
+        // which may have changed the result.
+        if (cannot_navigate())
+            return;
+    }
+
+    URL url(document().complete_url(action()));
+
+    if (!url.is_valid()) {
+        dbgln("Failed to submit form: Invalid URL: {}", action());
+        return;
+    }
+
+    if (url.protocol() == "file") {
+        if (document().url().protocol() != "file") {
+            dbgln("Failed to submit form: Security violation: {} may not submit to {}", document().url(), url);
+            return;
+        }
+        if (effective_method != "get") {
+            dbgln("Failed to submit form: Unsupported form method '{}' for URL: {}", method(), url);
+            return;
+        }
+    } else if (url.protocol() != "http" && url.protocol() != "https") {
+        dbgln("Failed to submit form: Unsupported protocol for URL: {}", url);
+        return;
+    }
+
+    Vector<URLQueryParam> parameters;
+
+    for_each_in_subtree_of_type<HTMLInputElement>([&](auto& node) {
+        auto& input = downcast<HTMLInputElement>(node);
+        if (!input.name().is_null() && (input.type() != "submit" || &input == submitter))
+            parameters.append({ input.name(), input.value() });
+        return IterationDecision::Continue;
+    });
+
+    if (effective_method == "get") {
+        url.set_query(urlencode(parameters));
+    }
+
+    LoadRequest request;
+    request.set_url(url);
+
+    if (effective_method == "post") {
+        auto body = urlencode(parameters).to_byte_buffer();
+        request.set_method("POST");
+        request.set_header("Content-Type", "application/x-www-form-urlencoded");
+        request.set_header("Content-Length", String::number(body.size()));
+        request.set_body(body);
+    }
+
+    if (auto* page = document().page())
+        page->load(request);
+}
+
+void HTMLFormElement::submit()
+{
+    submit_form(this, true);
+}
+
+}