94 lines
2.8 KiB
C++
94 lines
2.8 KiB
C++
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#include "api.h"
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#include <QDebug>
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#include <QJsonDocument>
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#include <QJsonObject>
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constexpr const char* json = "application/json";
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struct NetworkReplyDeleter {
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void operator () (QNetworkReply* reply) {
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reply->deleteLater();
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}
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};
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API::API(const QUrl& address, QObject* parent):
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QObject(parent),
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address(address),
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network()
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{
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}
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void API::test(const QString& path, const QJSValue& finished) {
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qDebug() << "Testing" << path;
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QNetworkRequest request(path + "/info");
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request.setHeader(QNetworkRequest::ContentTypeHeader, json);
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QNetworkReply* reply = network.get(request);
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connect(reply, &QNetworkReply::finished,
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std::bind(&API::onTestSuccess, this, reply, finished)
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);
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}
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void API::onTestSuccess(QNetworkReply* reply, const QJSValue& finished) const {
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std::unique_ptr<QNetworkReply, NetworkReplyDeleter> rpl(reply);
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QNetworkReply::NetworkError error = reply->error();
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if (error != QNetworkReply::NoError) {
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QString err = reply->errorString();
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qDebug() << "Test for" << reply->url() << "failed:" << err;
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callCallback(finished, err);
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return;
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}
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QVariant contentType = reply->header(QNetworkRequest::ContentTypeHeader);
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if (!
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contentType.isValid() ||
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!contentType.canConvert<QString>() ||
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contentType.toString() != json
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) {
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QString err("wrong response content type");
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qDebug() << "Test for" << reply->url() << "failed:" << err;
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callCallback(finished, err);
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return;
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}
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QByteArray data = reply->readAll();
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QJsonDocument document = QJsonDocument::fromJson(data);
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QJsonObject rootObj = document.object();
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QJsonValue type = rootObj.value("type");
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QJsonValue version = rootObj.value("version");
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if (!type.isString() || !version.isString()) {
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QString err("malformed json");
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qDebug() << "Test for" << reply->url() << "failed:" << err;
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callCallback(finished, err);
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return;
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}
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if (type.toString() != "Pica") {
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QString err("server of this type (" + type.toString() + ") is not supported");
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qDebug() << "Test for" << reply->url() << "failed:" << err;
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callCallback(finished, err);
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return;
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}
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if (version.toString() != "0.0.1") {
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QString err("server of this version (" + version.toString() + ") is not supported");
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qDebug() << "Test for" << reply->url() << "failed:" << err;
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callCallback(finished, err);
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return;
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}
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callCallback(finished, QString(), {QJSValue(true)});
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}
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void API::callCallback(const QJSValue& callback, const QString& error, const QJSValueList& arguments) const {
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if (callback.isCallable()) {
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if (error.isEmpty())
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callback.call(QJSValueList({QJSValue(QJSValue::NullValue)}) + arguments);
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else
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callback.call({QJSValue(error)});
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}
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}
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