Replace url parser with one less strict

--HG--
branch : develop

code/nel/include/nel/gui/url_parser.h

@@ -0,0 +1,63 @@
+// Ryzom - MMORPG Framework <http://dev.ryzom.com/projects/ryzom/>
+// Copyright (C) 2010  Winch Gate Property Limited
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero 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 Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+#ifndef CL_URL_PARSER_H
+#define CL_URL_PARSER_H
+
+#include <string>
+
+namespace NLGUI
+{
+	/**
+	 * Simple URL parser
+	 * \author Meelis Mägi
+	 * \date 2015
+	 */
+	class CUrlParser
+	{
+	public:
+		CUrlParser(){}
+
+		// parse uri to components
+		CUrlParser(const std::string &url);
+
+		// parse uri to components
+		void parse(std::string uri);
+
+		// serialize URL back to string
+		std::string toString() const;
+
+		// inherit scheme, domain, path from given url
+		void inherit(const std::string &url);
+
+		// if current parts can compose absolute url or not
+		bool isAbsolute() const;
+
+		// resolve relative path like './a/../b' to absolute path '/a/b'
+		static void resolveRelativePath(std::string &path);
+
+	public:
+		std::string scheme;
+		std::string domain;
+		std::string path;
+		std::string query;
+		std::string hash;
+	};
+
+}// namespace
+
+#endif // CL_URL_PARSER_H
+

code/nel/src/gui/group_html.cpp

@@ -43,7 +43,7 @@
 #include "nel/misc/md5.h"
 #include "nel/3d/texture_file.h"
 #include "nel/misc/big_file.h"
-#include <libxml/uri.h>
+#include "nel/gui/url_parser.h"
 
 using namespace std;
 using namespace NLMISC;
@@ -4777,20 +4777,13 @@ namespace NLGUI
 	// ***************************************************************************
 	std::string CGroupHTML::getAbsoluteUrl(const std::string &url)
 	{
-		if (_URL.size() == 0 || url.find("http://") != std::string::npos || url.find("https://") != std::string::npos)
+		CUrlParser uri(url);
+		if (uri.isAbsolute())
 			return url;
 
-		xmlChar * uri;
-		uri = xmlBuildURI(reinterpret_cast<const xmlChar *>(url.c_str()), reinterpret_cast<const xmlChar *>(_URL.c_str()));
-		if (uri)
-		{
-			std::string ret(reinterpret_cast<char *>(uri));
-			xmlFree(uri);
+		uri.inherit(_URL);
 
-			return ret;
-		}
-
-		return url;
+		return uri.toString();
 	}
 
 	// ***************************************************************************

code/nel/src/gui/url_parser.cpp

@@ -0,0 +1,222 @@
+// Ryzom - MMORPG Framework <http://dev.ryzom.com/projects/ryzom/>
+// Copyright (C) 2010  Winch Gate Property Limited
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero 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 Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+#include <string>
+#include "nel/misc/types_nl.h"
+#include "nel/gui/url_parser.h"
+
+using namespace std;
+
+
+namespace NLGUI
+{
+	// ***************************************************************************
+	CUrlParser::CUrlParser(const std::string &uri)
+	{
+		parse(uri);
+	}
+
+	// ***************************************************************************
+	void CUrlParser::parse(std::string uri)
+	{
+		const size_t npos = std::string::npos;
+		size_t pos;
+		size_t offset = 0;
+
+		// strip fragment if present
+		pos = uri.find("#");
+		if (pos != npos)
+		{
+			hash = uri.substr(pos + 1);
+			uri = uri.substr(0, pos);
+		}
+
+		// scan for scheme
+		pos = uri.find(":");
+		if (pos != npos && pos >= 1)
+		{
+			for (uint i=0; i<pos; i++)
+			{
+				if (!isalnum(uri[i]))
+				{
+					pos = npos;
+					break;
+				}
+			}
+			if (pos != npos)
+			{
+				scheme = uri.substr(0, pos);
+				uri = uri.substr(pos + 1);
+			}
+		}
+
+		// scan for domain
+		if (uri.substr(0, 2) == "//")
+		{
+			pos = uri.find("/", 3);
+			domain = uri.substr(0, pos);
+			if (pos != npos)
+				uri = uri.substr(pos);
+			else
+				uri.clear();
+		}
+
+		// scan for query
+		pos = uri.find("?");
+		if (pos != npos)
+		{
+			query = uri.substr(pos + 1);
+			uri = uri.substr(0, pos);
+		}
+
+		// all that is remaining is path
+		path = uri;
+	}
+
+	void CUrlParser::inherit(const std::string &url)
+	{
+		// we have scheme, so we already absolute url
+		if (!scheme.empty())
+			return;
+
+		const size_t npos = std::string::npos;
+		size_t pos;
+
+		CUrlParser base(url);
+
+		scheme = base.scheme;
+
+		// if we already have domain, then ignore base path
+		if (!domain.empty())
+			return;
+
+		domain = base.domain;
+		if (path.empty())
+		{
+			path = base.path;
+			if (query.empty())
+				query = base.query;
+		}
+		else
+		if (path[0] != '/')
+		{
+			// find start of last path segment from base path
+			// if not found, then dont inherit base path at all
+			pos = base.path.find_last_of("/");
+			if (pos != npos)
+				path = base.path.substr(0, pos) + "/" + path;
+		}
+
+		resolveRelativePath(path);
+	}
+
+	void CUrlParser::resolveRelativePath(std::string &path)
+	{
+		const size_t npos = std::string::npos;
+
+		// no relative components in path. filename.ext is also matched, but that's fine
+		size_t pos = path.find(".");
+		if (pos == npos)
+			return;
+
+		// normalize path
+		size_t lhp = 0;
+		while(pos < path.size())
+		{
+			if (path[pos] == '.')
+			{
+				// scan ahead to see what we have
+				std::string sub = path.substr(pos, 2);
+				if (sub == "./" || sub == ".")
+				{
+					// starts with
+					if (pos == 0)
+						path.replace(pos, sub.size(), "/");
+					else
+					{
+						// full or last segment
+						sub = path.substr(pos-1, 3);
+						if (sub == "/./" || sub == "/.")
+						{
+							path.replace(pos, sub.size()-1, "");
+							// we just removed char that pos was pointing, so rewind
+							pos--;
+						}
+					}
+				}
+				else
+				if (sub == "..")
+				{
+					// starts with
+					if (pos == 0 && path.substr(pos, 3) == "../")
+						path.replace(pos, 3, "/");
+					else
+					if (pos > 0)
+					{
+						// full or last segment
+						sub = path.substr(pos-1, 4);
+						if (sub == "/../" || sub == "/..")
+						{
+							if (pos > 1)
+								lhp = path.find_last_of("/", pos - 2);
+							else
+								lhp = 0;
+
+							// pos points to first dot in ..
+							// lhp points to start slash (/) of last segment
+							pos += sub.size() - 1;
+							path.replace(lhp, pos - lhp, "/");
+							pos = lhp;
+						}
+					}
+				}// sub == ".."
+			} // path[pos] == '.'
+			pos++;
+		}// while
+	}
+
+	bool CUrlParser::isAbsolute() const
+	{
+		return !scheme.empty() && !domain.empty();
+	}
+
+	// serialize URL back to string
+	std::string CUrlParser::toString() const
+	{
+		std::string result;
+		if (!scheme.empty())
+			result += scheme + ":";
+
+		if (!domain.empty())
+		{
+			result += domain;
+		}
+
+		// path already has leading slash
+		if (!path.empty())
+			result += path;
+
+		if (!query.empty())
+			result += "?" + query;
+
+		if (!hash.empty())
+			result += "#" + hash;
+
+		return result;
+	}
+
+}// namespace
+