Fixed: Redirect for image requests

--HG--
branch : develop

code/nel/include/nel/gui/group_html.h

@@ -821,7 +821,7 @@ namespace NLGUI
 		{
 		public:
 			CDataDownload(const std::string &u, const std::string &d, TDataType t, CViewBase *i, const std::string &s, const std::string &m, const CStyleParams &style = CStyleParams())
-				: data(NULL), fp(NULL), url(u), dest(d), type(t), luaScript(s), md5sum(m)
+				: data(NULL), fp(NULL), url(u), dest(d), type(t), luaScript(s), md5sum(m), redirects(0)
 			{
 				if (t == ImgType) imgs.push_back(CDataImageDownload(i, style));
 			}
@@ -833,6 +833,7 @@ namespace NLGUI
 			std::string luaScript;
 			std::string md5sum;
 			TDataType type;
+			uint32 redirects;
 			FILE *fp;
 			std::vector<CDataImageDownload> imgs;
 		};

code/nel/src/gui/group_html.cpp

@@ -651,6 +651,40 @@ namespace NLGUI
 							string tmpfile = it->dest + ".tmp";
 							if(res != CURLE_OK || r < 200 || r >= 300 || (!it->md5sum.empty() && (it->md5sum != getMD5(tmpfile).toString())))
 							{
+								if (it->redirects < DEFAULT_RYZOM_REDIRECT_LIMIT && ((r >= 301 && r <= 303) || r == 307 || r == 308))
+								{
+									std::string location(it->data->getLocationHeader());
+									if (!location.empty())
+									{
+										CUrlParser uri(location);
+										if (!uri.isAbsolute())
+										{
+											uri.inherit(it->url);
+											location = uri.toString();
+										}
+
+										it->url = location;
+										it->fp = NULL;
+
+										// release CCurlWWWData
+										delete it->data;
+										it->data = NULL;
+
+										it->redirects++;
+	#ifdef LOG_DL
+										nlwarning("Redirect '%s'", location.c_str());
+	#endif
+										// keep the request in queue
+										continue;
+									}
+									else
+										nlwarning("Redirected to empty url '%s'", it->url.c_str());
+								}
+								else
+								{
+									if (it->redirects >= DEFAULT_RYZOM_REDIRECT_LIMIT)
+										nlwarning("Redirect limit reached for '%s'", it->url.c_str());
+
 									NLMISC::CFile::deleteFile(tmpfile.c_str());
 
 									// 304 Not Modified
@@ -664,6 +698,7 @@ namespace NLGUI
 										CHttpCache::getInstance()->store(it->dest, obj);
 									}
 								}
+							}
 							else
 							{
 								CHttpCacheObject obj;