Fiat API

Co-Authored-By: selsta <selsta@sent.at>
Co-Authored-By: Gene Peters <gene@telligent-data.com>

src/qt/prices.cpp

@@ -0,0 +1,110 @@
+// Copyright (c) 2014-2019, The Monero Project
+// 
+// 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.
+// 
+// 3. Neither the name of the copyright holder nor the names of its contributors may be
+//    used to endorse or promote products derived from this software without specific
+//    prior written permission.
+// 
+// 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 <QtCore>
+#include <QNetworkAccessManager>
+
+#include "utils.h"
+#include "prices.h"
+
+
+Prices::Prices(QNetworkAccessManager *networkAccessManager, QObject *parent)
+    : QObject(parent) {
+    this->m_networkAccessManager = networkAccessManager;
+}
+
+void Prices::getJSON(const QString url) {
+    qDebug() << QString("Fetching: %1").arg(url);
+    QNetworkRequest request;
+    request.setUrl(QUrl(url));
+    request.setRawHeader("User-Agent", randomUserAgent().toUtf8());
+    request.setRawHeader("Content-Type", "application/json");
+
+    m_reply = this->m_networkAccessManager->get(request);
+
+    connect(m_reply, SIGNAL(finished()), this, SLOT(gotJSON()));
+}
+
+void Prices::gotJSON() {
+    // Check connectivity
+    if (!m_reply || m_reply->error() != QNetworkReply::NoError){
+        this->gotError();
+        m_reply->deleteLater();
+        return;
+    }
+
+    // Check json header
+    QList<QByteArray> headerList = m_reply->rawHeaderList();
+    QByteArray headerJson = m_reply->rawHeader("Content-Type");
+    if(headerJson.length() <= 15){
+        this->gotError("Bad Content-Type");
+        m_reply->deleteLater();
+        return;
+    }
+
+    QString headerJsonStr = QTextCodec::codecForMib(106)->toUnicode(headerJson);
+    int _contentType = headerList.indexOf("Content-Type");
+    if (_contentType < 0 || !headerJsonStr.startsWith("application/json")){
+        this->gotError("Bad Content-Type");
+        m_reply->deleteLater();
+        return;
+    }
+
+    // Check valid json document
+    QByteArray data = m_reply->readAll();
+    QJsonDocument doc = QJsonDocument::fromJson(data);
+    QString jsonString = doc.toJson(QJsonDocument::Indented);
+    if (jsonString.isEmpty()){
+        this->gotError("Bad JSON");
+        m_reply->deleteLater();
+        return;
+    }
+
+    // Insert source url for later reference
+    QUrl url = m_reply->url();
+    QJsonObject docobj = doc.object();
+    docobj["_url"] = url.toString();
+    doc.setObject(docobj);
+
+    qDebug() << QString("Fetched: %1").arg(url.toString());
+
+    // Emit signal
+    QVariantMap vMap = doc.object().toVariantMap();
+    emit priceJsonReceived(vMap);
+
+    m_reply->deleteLater();
+}
+
+void Prices::gotError() {
+    this->gotError("Unknown error");
+}
+
+void Prices::gotError(const QString &message) {
+    qCritical() << __FUNCTION__ << ": Error: " << message;
+    emit priceJsonError(message);
+}