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curljsonrequest.h

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00001 /* ScummVM - Graphic Adventure Engine
00002  *
00003  * ScummVM is the legal property of its developers, whose names
00004  * are too numerous to list here. Please refer to the COPYRIGHT
00005  * file distributed with this source distribution.
00006  *
00007  * This program is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU General Public License
00009  * as published by the Free Software Foundation; either version 2
00010  * of the License, or (at your option) any later version.
00011  *
00012  * This program is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015  * GNU General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU General Public License
00018  * along with this program; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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00021  */
00022 
00023 #ifndef BACKENDS_NETWORKING_CURL_CURLJSONREQUEST_H
00024 #define BACKENDS_NETWORKING_CURL_CURLJSONREQUEST_H
00025 
00026 #include "backends/networking/curl/curlrequest.h"
00027 #include "common/memstream.h"
00028 #include "common/json.h"
00029 
00030 namespace Networking {
00031 
00032 typedef Response<Common::JSONValue *> JsonResponse;
00033 typedef Common::BaseCallback<JsonResponse> *JsonCallback;
00034 typedef Common::BaseCallback<Common::JSONValue *> *JSONValueCallback;
00035 
00036 #define CURL_JSON_REQUEST_BUFFER_SIZE 512 * 1024
00037 
00038 class CurlJsonRequest: public CurlRequest {
00039 protected:
00040     JsonCallback _jsonCallback;
00041     Common::MemoryWriteStreamDynamic _contentsStream;
00042     byte *_buffer;
00043 
00045     char *getPreparedContents();
00046 
00048     virtual void finishJson(Common::JSONValue *json);
00049 
00050 public:
00051     CurlJsonRequest(JsonCallback cb, ErrorCallback ecb, Common::String url);
00052     virtual ~CurlJsonRequest();
00053 
00054     virtual void handle();
00055     virtual void restart();
00056 
00057     static bool jsonIsObject(Common::JSONValue *item, const char *warningPrefix);
00058     static bool jsonContainsObject(Common::JSONObject &item, const char *key, const char *warningPrefix, bool isOptional = false);
00059     static bool jsonContainsString(Common::JSONObject &item, const char *key, const char *warningPrefix, bool isOptional = false);
00060     static bool jsonContainsIntegerNumber(Common::JSONObject &item, const char *key, const char *warningPrefix, bool isOptional = false);
00061     static bool jsonContainsArray(Common::JSONObject &item, const char *key, const char *warningPrefix, bool isOptional = false);
00062     static bool jsonContainsStringOrIntegerNumber(Common::JSONObject &item, const char *key, const char *warningPrefix, bool isOptional = false);
00063     static bool jsonContainsAttribute(Common::JSONObject &item, const char *key, const char *warningPrefix, bool isOptional = false);
00064 };
00065 
00066 } // End of namespace Networking
00067 
00068 #endif


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