CLOUD: Add CurlRequest

CurlRequest uses own multi_handle, in which it creates an easy_handle to
make a request.

Every time `handle()` is called it checks whether request is complete
and, if it is, stops.

backends/cloud/dropbox/curlrequest.cpp

@@ -0,0 +1,82 @@
+/* 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 2
+* 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, write to the Free Software
+* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+*
+*/
+
+#define FORBIDDEN_SYMBOL_ALLOW_ALL
+
+#include "backends/cloud/dropbox/curlrequest.h"
+#include "common/debug.h"
+#include <curl/curl.h>
+
+namespace Cloud {
+namespace Dropbox {
+
+static size_t curlDataCallback(char *d, size_t n, size_t l, void *p) {
+	debug("%p got %d more bytes", p, n * l);
+	return n * l;
+}
+
+CurlRequest::CurlRequest(Callback cb, char *url) : Request(cb), _firstTime(true) {
+	_curlm = curl_multi_init();
+	_url = url;
+}
+
+CurlRequest::~CurlRequest() {
+	curl_multi_cleanup(_curlm);
+}
+
+bool CurlRequest::handle() {
+	if (_firstTime) {
+		CURL *eh = curl_easy_init();
+		curl_easy_setopt(eh, CURLOPT_WRITEFUNCTION, curlDataCallback);
+		curl_easy_setopt(eh, CURLOPT_WRITEDATA, this);
+		curl_easy_setopt(eh, CURLOPT_HEADER, 0L);
+		curl_easy_setopt(eh, CURLOPT_URL, _url);
+		curl_easy_setopt(eh, CURLOPT_VERBOSE, 0L);
+		curl_multi_add_handle(_curlm, eh);
+
+		_firstTime = false;
+	}
+
+	int U;
+	curl_multi_perform(_curlm, &U);
+
+	int Q;
+	CURLMsg *_curlMsg;
+	while ((_curlMsg = curl_multi_info_read(_curlm, &Q))) {
+		if (_curlMsg->msg == CURLMSG_DONE) {			
+			CURL *e = _curlMsg->easy_handle;
+			debug("R: %d - %s\n", _curlMsg->data.result, curl_easy_strerror(_curlMsg->data.result));
+			curl_multi_remove_handle(_curlm, e);
+			curl_easy_cleanup(e);
+
+			_callback(0);
+			return true;
+		} else {
+			debug("E: CURLMsg (%d)\n", _curlMsg->msg);
+		}
+	}
+
+	return false;
+}
+
+} //end of namespace Dropbox
+} //end of namespace Cloud

backends/cloud/dropbox/curlrequest.h

@@ -20,33 +20,29 @@
 *
 */
 
-#ifndef BACKENDS_CLOUD_DROPBOX_FINALCOUNTDOWNREQUEST_H
+#ifndef BACKENDS_CLOUD_DROPBOX_CURLREQUEST_H
-#define BACKENDS_CLOUD_DROPBOX_FINALCOUNTDOWNREQUEST_H
+#define BACKENDS_CLOUD_DROPBOX_CURLREQUEST_H
 
 #include "backends/cloud/request.h"
 
+typedef void CURLM;
+
 namespace Cloud {
 namespace Dropbox {
 
-class FinalCountdownRequest : public Cloud::Request {
+class CurlRequest : public Cloud::Request {
-	int _times;
+	bool _firstTime;
+	CURLM *_curlm;
+	char *_url;
 
 public:
-	FinalCountdownRequest(Callback cb) : Request(cb), _times(5) {};
+	CurlRequest(Callback cb, char *url);
+	virtual ~CurlRequest();
 
-	virtual bool handle() {
+	virtual bool handle();
-		if (--_times == 0) {
-			warning("It's the final countdown!");
-			_callback(0); //meh, don't have anything for you, my caller
-			return true;
-		}
-
-		warning("%d...", _times);
-		return false;
-	}
 };
 
-}
+}  //end of namespace Dropbox
-}  //end of namespace Cloud::Dropbox
+}  //end of namespace Cloud
 
 #endif

backends/cloud/dropbox/dropboxstorage.cpp

@@ -19,18 +19,26 @@
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 */
+#define FORBIDDEN_SYMBOL_ALLOW_ALL
 
 #include "backends/cloud/dropbox/dropboxstorage.h"
-#include "backends/cloud/dropbox/finalcountdownrequest.h"
+#include "backends/cloud/dropbox/curlrequest.h"
 #include "common/debug.h"
+#include <curl/curl.h>
 
 namespace Cloud {
 namespace Dropbox {
 
-static void finalCountdownCallback(void *ptr) {
+static void curlCallback(void *ptr) {
-	warning("ladies and gentlemen, this is your callback speaking");
+	debug("--- curl request is complete ---");
-	warning("the returned pointer is %d", ptr);
+}
-	warning("thank you for your attention");
+
+DropboxStorage::DropboxStorage() {
+	curl_global_init(CURL_GLOBAL_ALL);
+}
+
+DropboxStorage::~DropboxStorage() {
+	curl_global_cleanup();
 }
 
 void DropboxStorage::listDirectory(Common::String path) {
@@ -38,7 +46,8 @@ void DropboxStorage::listDirectory(Common::String path) {
 }
 
 void DropboxStorage::syncSaves() {	
-	addRequest(new FinalCountdownRequest(finalCountdownCallback));	
+	addRequest(new CurlRequest(curlCallback, "tkachov.ru"));
+	addRequest(new CurlRequest(curlCallback, "bash.im"));
 }
 
 } //end of namespace Dropbox

backends/cloud/dropbox/dropboxstorage.h

@@ -29,7 +29,8 @@ namespace Cloud { namespace Dropbox {
 
 class DropboxStorage: public Cloud::Storage {	
 public:
-	DropboxStorage() {};
+	DropboxStorage();
+	virtual ~DropboxStorage();
 
 	virtual void listDirectory(Common::String path);
 	virtual void syncSaves();

backends/cloud/storage.cpp

@@ -42,7 +42,10 @@ void Storage::handler() {
 	//TODO: lock mutex here (in case another handler() would be called before this one ends)
 	warning("handler's here");
 	for (Common::Array<Request *>::iterator i = _requests.begin(); i != _requests.end();) {
-		if ((*i)->handle()) _requests.erase(i);
+		if ((*i)->handle()) {
+			delete (*i);
+			_requests.erase(i);
+		}
 		else ++i;
 	}
 	if (_requests.empty()) stopTimer();

backends/module.mk

@@ -23,7 +23,8 @@ ifdef USE_CLOUD
 MODULE_OBJS += \
 	cloud/manager.o \
 	cloud/storage.o \
-	cloud/dropbox/dropboxstorage.o
+	cloud/dropbox/dropboxstorage.o \
+	cloud/dropbox/curlrequest.o
 endif
 
 ifdef USE_ELF_LOADER