[Qt] Introduce the Qt HTTPRequest and HTTPFileSource

1 files changed, 123 insertions, 0 deletions

diff --git a/platform/qt/src/http_file_source.cpp b/platform/qt/src/http_file_source.cpp
new file mode 100644
index 0000000000..a38cf42363
--- /dev/null
+++ b/platform/qt/src/http_file_source.cpp
@@ -0,0 +1,123 @@
+#include "http_file_source.hpp"
+#include "http_request.hpp"
+
+#include <mbgl/platform/log.hpp>
+
+#include <QByteArray>
+#include <QDir>
+#include <QNetworkProxyFactory>
+#include <QNetworkReply>
+#include <QSslConfiguration>
+
+namespace mbgl {
+
+HTTPFileSource::Impl::Impl() : m_manager(new QNetworkAccessManager(this))
+{
+    QNetworkProxyFactory::setUseSystemConfiguration(true);
+
+#if QT_VERSION >= 0x050000
+    m_ssl.setProtocol(QSsl::SecureProtocols);
+#else
+    // Qt 4 defines SecureProtocols as TLS1 or SSL3, but we don't want SSL3.
+    m_ssl.setProtocol(QSsl::TlsV1);
+#endif
+
+    m_ssl.setCaCertificates(QSslCertificate::fromPath("ca-bundle.crt"));
+    if (m_ssl.caCertificates().isEmpty()) {
+        mbgl::Log::Warning(mbgl::Event::HttpRequest, "Could not load list of certificate authorities");
+    }
+
+    connect(m_manager, SIGNAL(finished(QNetworkReply*)), this, SLOT(replyFinish(QNetworkReply*)));
+}
+
+void HTTPFileSource::Impl::request(HTTPRequest* req)
+{
+    QUrl url = req->requestUrl();
+
+    QPair<QNetworkReply*, QVector<HTTPRequest*>>& data = m_pending[url];
+    QVector<HTTPRequest*>& requestsVector = data.second;
+    requestsVector.append(req);
+
+    if (requestsVector.size() > 1) {
+        return;
+    }
+
+    QNetworkRequest networkRequest = req->networkRequest();
+    networkRequest.setSslConfiguration(m_ssl);
+
+    data.first = m_manager->get(networkRequest);
+}
+
+void HTTPFileSource::Impl::cancel(HTTPRequest* req)
+{
+    QUrl url = req->requestUrl();
+
+    auto it = m_pending.find(url);
+    if (it == m_pending.end()) {
+        return;
+    }
+
+    QPair<QNetworkReply*, QVector<HTTPRequest*>>& data = it.value();
+    QNetworkReply* reply = data.first;
+    QVector<HTTPRequest*>& requestsVector = data.second;
+
+    for (int i = 0; i < requestsVector.size(); ++i) {
+        if (req == requestsVector.at(i)) {
+            requestsVector.remove(i);
+            break;
+        }
+    }
+
+    if (requestsVector.empty()) {
+        m_pending.erase(it);
+#if QT_VERSION >= 0x050000
+        reply->abort();
+#else
+        // XXX: We should be aborting the reply here
+        // but a bug on Qt4 causes the connection of
+        // other ongoing requests to drop if we call
+        // abort() too often (and we do).
+        Q_UNUSED(reply);
+#endif
+    }
+}
+
+void HTTPFileSource::Impl::replyFinish(QNetworkReply* reply)
+{
+    const QUrl& url = reply->request().url();
+
+    auto it = m_pending.find(url);
+    if (it == m_pending.end()) {
+        reply->deleteLater();
+        return;
+    }
+
+    QVector<HTTPRequest*>& requestsVector = it.value().second;
+    for (auto req : requestsVector) {
+        req->handleNetworkReply(reply);
+    }
+
+    m_pending.erase(it);
+    reply->deleteLater();
+}
+
+HTTPFileSource::HTTPFileSource()
+    : impl(std::make_unique<Impl>()) {
+}
+
+HTTPFileSource::~HTTPFileSource() = default;
+
+std::unique_ptr<AsyncRequest> HTTPFileSource::request(const Resource& resource, Callback callback)
+{
+    return std::make_unique<HTTPRequest>(impl.get(), resource, callback);
+}
+
+uint32_t HTTPFileSource::maximumConcurrentRequests() {
+#if QT_VERSION >= 0x050000
+    return 20;
+#else
+    return 10;
+#endif
+}
+
+} // mbgl