4ffac713b9
This patch adds very basic XMLHttpRequest support to LibWeb. Here's an
example that currently works:
var callback = function() { alert(this.responseText); }
var xhr = new XMLHttpRequest();
xhr.addEventListener("load", callback);
xhr.open("GET", "http://serenityos.org/~kling/test/example.txt");
xhr.send();
There are many limitations and bugs, but it's pretty dang awesome that
we have XHR. :^)
89 lines
3.1 KiB
C++
89 lines
3.1 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <LibJS/Interpreter.h>
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#include <LibJS/Runtime/Function.h>
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#include <LibWeb/Bindings/EventWrapper.h>
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#include <LibWeb/Bindings/XMLHttpRequestWrapper.h>
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#include <LibWeb/DOM/Event.h>
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#include <LibWeb/DOM/EventListener.h>
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#include <LibWeb/DOM/XMLHttpRequest.h>
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#include <LibWeb/ResourceLoader.h>
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namespace Web {
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XMLHttpRequest::XMLHttpRequest()
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{
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}
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XMLHttpRequest::~XMLHttpRequest()
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{
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}
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String XMLHttpRequest::response_text() const
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{
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if (m_response.is_null())
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return {};
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return String::copy(m_response);
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}
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void XMLHttpRequest::open(const String& method, const String& url)
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{
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m_method = method;
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m_url = url;
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}
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void XMLHttpRequest::send()
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{
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ResourceLoader::the().load(
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URL(m_url),
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[weak_this = make_weak_ptr()](auto& data) {
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if (!weak_this)
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return;
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const_cast<XMLHttpRequest&>(*weak_this).m_response = data;
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const_cast<XMLHttpRequest&>(*weak_this).dispatch_event(Event::create("load"));
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},
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[weak_this = make_weak_ptr()](auto& error) {
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if (!weak_this)
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return;
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dbg() << "XHR failed to load: " << error;
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const_cast<XMLHttpRequest&>(*weak_this).dispatch_event(Event::create("error"));
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});
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}
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void XMLHttpRequest::dispatch_event(NonnullRefPtr<Event> event)
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{
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for (auto& listener : listeners()) {
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if (listener.event_name == event->name()) {
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auto* function = const_cast<EventListener&>(*listener.listener).function();
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auto* this_value = wrap(function->heap(), *this);
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auto* event_wrapper = wrap(function->heap(), *event);
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function->interpreter().call(function, this_value, { event_wrapper });
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}
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}
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}
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}
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