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backends/networking/http/httpjsonrequest.h

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef BACKENDS_NETWORKING_HTTP_HTTPJSONREQUEST_H
+#define BACKENDS_NETWORKING_HTTP_HTTPJSONREQUEST_H
+
+#include "backends/networking/http/httprequest.h"
+#include "common/memstream.h"
+#include "common/formats/json.h"
+
+namespace Networking {
+
+typedef Response<const Common::JSONValue *> JsonResponse;
+typedef Common::BaseCallback<const JsonResponse &> *JsonCallback;
+typedef Common::BaseCallback<const Common::JSONValue *> *JSONValueCallback;
+
+#define HTTP_JSON_REQUEST_BUFFER_SIZE 512 * 1024
+
+class HttpJsonRequest: public HttpRequest {
+protected:
+	JsonCallback _jsonCallback;
+	Common::MemoryWriteStreamDynamic _contentsStream;
+	byte *_buffer;
+
+	/** Sets FINISHED state and passes the JSONValue * into user's callback in JsonResponse. */
+	virtual void finishJson(const Common::JSONValue *json);
+
+public:
+	HttpJsonRequest(JsonCallback cb, ErrorCallback ecb, const Common::String &url);
+	~HttpJsonRequest() override;
+
+	void handle() override;
+	void restart() override;
+
+	static bool jsonIsObject(const Common::JSONValue *item, const char *warningPrefix);
+	static bool jsonContainsObject(const Common::JSONObject &item, const char *key, const char *warningPrefix, bool isOptional = false);
+	static bool jsonContainsString(const Common::JSONObject &item, const char *key, const char *warningPrefix, bool isOptional = false);
+	static bool jsonContainsIntegerNumber(const Common::JSONObject &item, const char *key, const char *warningPrefix, bool isOptional = false);
+	static bool jsonContainsArray(const Common::JSONObject &item, const char *key, const char *warningPrefix, bool isOptional = false);
+	static bool jsonContainsStringOrIntegerNumber(const Common::JSONObject &item, const char *key, const char *warningPrefix, bool isOptional = false);
+	static bool jsonContainsAttribute(const Common::JSONObject &item, const char *key, const char *warningPrefix, bool isOptional = false);
+};
+
+} // End of namespace Networking
+
+#endif