network: provide common HTTP GET functionality with js callbacks

3 files changed, 57 insertions, 84 deletions

diff --git a/src/qt/prices.cpp b/src/qt/network.cpp
index 6c09553a..0d523a5c 100644
--- a/src/qt/prices.cpp
+++ b/src/qt/network.cpp
@@ -1,21 +1,21 @@
 // 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
@@ -26,6 +26,8 @@
 // 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 "network.h"
+
 #include <QDebug>
 #include <QtCore>
 
@@ -37,74 +39,54 @@
 #pragma GCC diagnostic pop
 
 #include "utils.h"
-#include "prices.h"
 
-Prices::Prices(QObject *parent)
+Network::Network(QObject *parent)
     : QObject(parent)
     , m_scheduler(this)
 {
 }
 
-void Prices::getJSON(const QString url) const
+void Network::get(const QString &url, const QJSValue &callback, const QString &contentType) const
 {
     qDebug() << QString("Fetching: %1").arg(url);
 
-    m_scheduler.run([this, url] {
-        epee::net_utils::http::http_simple_client http_client;
+    m_scheduler.run(
+        [url, contentType] {
+            epee::net_utils::http::http_simple_client httpClient;
 
-        const QUrl urlParsed(url);
-        http_client.set_server(urlParsed.host().toStdString(), urlParsed.scheme() == "https" ? "443" : "80", {});
+            const QUrl urlParsed(url);
+            httpClient.set_server(urlParsed.host().toStdString(), urlParsed.scheme() == "https" ? "443" : "80", {});
 
-        const QString uri = (urlParsed.hasQuery() ? urlParsed.path() + "?" + urlParsed.query() : urlParsed.path());
-        const epee::net_utils::http::http_response_info* pri = NULL;
-        constexpr std::chrono::milliseconds timeout = std::chrono::seconds(15);
+            const QString uri = (urlParsed.hasQuery() ? urlParsed.path() + "?" + urlParsed.query() : urlParsed.path());
+            const epee::net_utils::http::http_response_info *pri = NULL;
+            constexpr std::chrono::milliseconds timeout = std::chrono::seconds(15);
 
-        const bool result = http_client.invoke(
-            uri.toStdString(),
-            "GET",
-            {},
-            timeout,
-            std::addressof(pri),
+            epee::net_utils::http::fields_list headers({{"User-Agent", randomUserAgent().toStdString()}});
+            if (!contentType.isEmpty())
             {
-                {"Content-Type", "application/json; charset=utf-8"},
-                {"User-Agent", randomUserAgent().toStdString()}
-            });
+                headers.push_back({"Content-Type", contentType.toStdString()});
+            }
+            const bool result = httpClient.invoke(uri.toStdString(), "GET", {}, timeout, std::addressof(pri), headers);
 
-        if (!result)
-        {
-            this->gotError("unknown error");
-        }
-        else if (!pri)
-        {
-            this->gotError("internal error (null response ptr)");
-        }
-        else if (pri->m_response_code != 200)
-        {
-            this->gotError(QString("response code: %1").arg(pri->m_response_code));
-        }
-        else
-        {
-            QJsonDocument doc = QJsonDocument::fromJson({&pri->m_body[0], static_cast<int>(pri->m_body.size())});
-            if (doc.isEmpty())
+            if (!result)
             {
-                this->gotError("bad JSON");
+                return QJSValueList({QJSValue(), QJSValue(), "unknown error"});
             }
-            else
+            if (!pri)
             {
-                // Insert source url for later reference
-                QJsonObject docobj = doc.object();
-                docobj["_url"] = url;
-                doc.setObject(docobj);
-
-                QVariantMap vMap = doc.object().toVariantMap();
-                emit priceJsonReceived(vMap);
+                return QJSValueList({QJSValue(), QJSValue(), "internal error (null response ptr)"});
             }
-        }
-    });
+            if (pri->m_response_code != 200)
+            {
+                return QJSValueList({QJSValue(), QJSValue(), QString("response code: %1").arg(pri->m_response_code)});
+            }
+
+            return QJSValueList({url, QString::fromStdString(pri->m_body)});
+        },
+        callback);
 }
 
-void Prices::gotError(const QString &message) const
+void Network::getJSON(const QString &url, const QJSValue &callback) const
 {
-    qCritical() << "[Fiat API] Error:" << message;
-    emit priceJsonError(message);
+    get(url, callback, "application/json; charset=utf-8");
 }
diff --git a/src/qt/network.h b/src/qt/network.h
new file mode 100644
index 00000000..765b2512
--- /dev/null
+++ b/src/qt/network.h
@@ -0,0 +1,20 @@
+#pragma once
+
+#include <QCoreApplication>
+#include <QtNetwork>
+
+#include "FutureScheduler.h"
+
+class Network : public QObject
+{
+    Q_OBJECT
+public:
+    Network(QObject *parent = nullptr);
+
+public:
+    Q_INVOKABLE void get(const QString &url, const QJSValue &callback, const QString &contentType = {}) const;
+    Q_INVOKABLE void getJSON(const QString &url, const QJSValue &callback) const;
+
+private:
+    mutable FutureScheduler m_scheduler;
+};
diff --git a/src/qt/prices.h b/src/qt/prices.h
deleted file mode 100644
index 4168aedc..00000000
--- a/src/qt/prices.h
+++ /dev/null
@@ -1,29 +0,0 @@
-#ifndef PRICES_H
-#define PRICES_H
-
-#include <QCoreApplication>
-#include <QtNetwork>
-
-#include "FutureScheduler.h"
-
-class Prices : public QObject
-{
-Q_OBJECT
-public:
-    Prices(QObject *parent = nullptr);
-
-public:
-    Q_INVOKABLE void getJSON(const QString url) const;
-
-private:
-    void gotError(const QString &message) const;
-
-signals:
-    void priceJsonReceived(QVariantMap document) const;
-    void priceJsonError(QString message) const;
-
-private:
-    mutable FutureScheduler m_scheduler;
-};
-
-#endif // PRICES_H