Adding reseed support. v1, only http so far.

Makefile

@@ -4,9 +4,9 @@ CFLAGS = -g -Wall -std=c++0x
 OBJECTS = obj/i2p.o obj/base64.o obj/NTCPSession.o obj/RouterInfo.o obj/Transports.o \
 	obj/RouterContext.o obj/NetDb.o obj/LeaseSet.o obj/Tunnel.o obj/TunnelEndpoint.o \
     obj/TunnelGateway.o obj/TransitTunnel.o obj/I2NPProtocol.o obj/Log.o obj/Garlic.o \
-    obj/HTTPServer.o obj/Streaming.o obj/Identity.o obj/SSU.o obj/util.o
+    obj/HTTPServer.o obj/Streaming.o obj/Identity.o obj/SSU.o obj/util.o obj/Reseed.o
 INCFLAGS = 
-LDFLAGS = -Wl,-rpath,/usr/local/lib -lcryptopp -lboost_system -lboost_filesystem -lpthread
+LDFLAGS = -Wl,-rpath,/usr/local/lib -lcryptopp -lboost_system -lboost_filesystem -lboost_regex -lpthread
 LIBS = 
 
 all: i2p

NetDb.cpp

@@ -13,6 +13,7 @@
 #include "RouterContext.h"
 #include "Garlic.h"
 #include "NetDb.h"
+#include "Reseed.h"
 
 namespace i2p
 {
@@ -207,12 +208,23 @@ namespace data
 	
 	void NetDb::Load (const char * directory)
 	{
+		Load(directory, false);
+	}
+
+	void NetDb::Load (const char * directory, bool reseed)
+	{
+		i2p::data::Reseeder *reseeder = new i2p::data::Reseeder();
 		boost::filesystem::path p (directory);
 		if (!boost::filesystem::exists (p))
 		{
 			if (!CreateNetDb(directory)) return;
+			reseeder->reseedNow();
+		}
+		if (reseed)
+		{
+			reseeder->reseedNow();
+			m_reseedRetries++;
 		}
-		// TODO: Reseed if needed.
 		int numRouters = 0;
 		boost::filesystem::directory_iterator end;
 		for (boost::filesystem::directory_iterator it (p); it != end; ++it)
@@ -232,6 +244,8 @@ namespace data
 			}	
 		}
 		LogPrint (numRouters, " routers loaded");
+		if (numRouters < 100 && m_reseedRetries < 10)
+			Load(directory, true); // Reseed
 	}	
 
 	void NetDb::SaveUpdated (const char * directory)
@@ -601,45 +615,5 @@ namespace data
 		return r;
 	}	
 
-	//TODO: Move to reseed.
-	//TODO: Implement v1 & v2 reseeding. Lightweight zip library is needed for v2.
-	// orignal: zip is part of crypto++, see implementation of DatabaseStoreMsg
-	//TODO: Implement SU3, utils.
-	void NetDb::DownloadRouterInfo (const std::string& address, const std::string& filename)
-	{
-		try
-		{
-			boost::asio::ip::tcp::iostream site(address, "http");
-			if (!site)
-			{
-				//site.expires_from_now (boost::posix_time::seconds (10)); // wait for 10 seconds 
-				site << "GET " << filename << "HTTP/1.0\nHost: " << address << "\nAccept: */*\nConnection: close\n\n";
-				// read response
-				std::string version, statusMessage;
-				site >> version; // HTTP version
-				int status;
-				site >> status; // status
-				std::getline (site, statusMessage);
-				if (status == 200) // OK
-				{
-					std::string header;
-					while (header != "\n")
-						std::getline (site, header);
-					// read content
-					std::stringstream ss;
-					ss << site.rdbuf();
-					AddRouterInfo ((uint8_t *)ss.str ().c_str (), ss.str ().size ());
-				}
-				else
-					LogPrint ("HTTP response ", status);
-			}
-			else
-				LogPrint ("Can't connect to ", address);
-		}
-		catch (std::exception& ex)
-		{
-			LogPrint ("Failed to download ", filename, " : ", ex.what ());
-		}
-	}
 }
 }

NetDb.h

@@ -78,8 +78,8 @@ namespace data
 
 			bool CreateNetDb(const char * directory);
 			void Load (const char * directory);
+			void Load (const char * directory, bool reseed);
 			void SaveUpdated (const char * directory);
-			void DownloadRouterInfo (const std::string& address, const std::string& filename); // for reseed 
 			void Run (); // exploratory thread
 			void Explore ();
 			const RouterInfo * GetClosestFloodfill (const IdentHash& destination, const std::set<IdentHash>& excluded) const;
@@ -95,6 +95,7 @@ namespace data
 			std::map<IdentHash, RequestedDestination *> m_RequestedDestinations;
 			
 			bool m_IsRunning;
+			int m_reseedRetries = 0;
 			std::thread * m_Thread;	
 			i2p::util::Queue<I2NPMessage> m_Queue; // of I2NPDatabaseStoreMsg
 	};

Reseed.cpp

@@ -0,0 +1,70 @@
+#include <iostream>
+#include <fstream>
+#include <boost/filesystem.hpp>
+#include <boost/regex.hpp>
+#include "Reseed.h"
+#include "Log.h"
+#include "util.h"
+
+
+namespace i2p
+{
+namespace data
+{
+
+	Reseeder::Reseeder()
+	{
+	}
+
+	Reseeder::~Reseeder()
+	{
+	}
+
+	bool Reseeder::reseedNow()
+	{
+		try
+		{
+			std::string reseedHost = httpReseedHostList[(rand() % httpReseedHostList.size())];
+			LogPrint("Reseeding from ", reseedHost);
+			std::string content = i2p::util::http::httpRequest(reseedHost);
+			if (content == "")
+			{
+				LogPrint("Reseed failed");
+				return false;
+			}
+			boost::regex e("<\\s*A\\s+[^>]*href\\s*=\\s*\"([^\"]*)\"",
+               boost::regex::normal | boost::regbase::icase);
+			boost::sregex_token_iterator i(content.begin(), content.end(), e, 1);
+			boost::sregex_token_iterator j;
+			std::string name;
+			std::string routerInfo;
+			std::string tmpUrl;
+			std::string filename;
+			while (i != j)
+			{
+				name = *i++;
+				LogPrint("Downloading ", name);
+				tmpUrl = reseedHost;
+				tmpUrl.append(name);
+				routerInfo = i2p::util::http::httpRequest(tmpUrl);
+				filename = "netDb/r";
+				filename += name.at(11);
+				filename.append("/");
+				filename.append(name.c_str());
+				std::ofstream outfile (filename, std::ios::binary);
+				outfile << routerInfo;
+				outfile.close();
+			}
+			return true;
+		}
+		catch (std::exception& ex)
+		{
+			//TODO: error reporting
+			return false;
+		}
+		return false;
+	}	
+
+}
+}
+

Reseed.h

@@ -0,0 +1,28 @@
+#ifndef RESEED_H
+#define RESEED_H
+
+#include <string>
+#include <vector>
+
+namespace i2p
+{
+namespace data
+{
+
+	class Reseeder
+	{
+		public:
+			Reseeder();
+			~Reseeder();
+			bool reseedNow();
+		private:
+			std::vector<std::string> httpReseedHostList = {
+				"http://193.150.121.66/netDb/",
+				"http://netdb.i2p2.no/"
+			};
+	};
+
+}
+}
+
+#endif

util.cpp

@@ -1,4 +1,11 @@
+#include <string>
+#include <algorithm>
+#include <cctype>
+#include <functional>
+#include <fstream>
+#include <boost/asio.hpp>
 #include "util.h"
+#include "Log.h"
 
 namespace i2p
 {
@@ -40,6 +47,94 @@ const char* GetCharArg(const std::string& strArg, const std::string& nDefault)
     return nDefault.c_str();
 }
 
+namespace http
+{
+//const std::string& filename
+//AddRouterInfo ((uint8_t *)ss.str ().c_str (), ss.str ().size ());
+	//TODO: Move to reseed.
+	//TODO: Implement v1 & v2 reseeding. Lightweight zip library is needed for v2.
+	// orignal: zip is part of crypto++, see implementation of DatabaseStoreMsg
+	//TODO: Implement SU3, utils.
+	std::string httpRequest(const std::string& address)
+	{
+		try
+		{
+			i2p::util::http::url u(address);
+			boost::asio::ip::tcp::iostream site;
+			site.expires_from_now (boost::posix_time::seconds(30));
+			site.connect(u.host_, "http");
+			if (site)
+			{
+				//site.expires_from_now (boost::posix_time::seconds (10)); // wait for 10 seconds
+				// User-Agent is needed to get the server list routerInfo files.
+				site << "GET " << u.path_ << " HTTP/1.0\r\nHost: " << u.host_
+				<< "\r\nAccept: */*\r\n" << "User-Agent: Wget/1.11.4\r\n" << "Connection: close\r\n\r\n";
+				// read response
+				std::string version, statusMessage;
+				site >> version; // HTTP version
+				int status;
+				site >> status; // status
+				std::getline (site, statusMessage);
+				if (status == 200) // OK
+				{
+					std::string header;
+					while (std::getline(site, header) && header != "\r"){}
+					std::stringstream ss;
+					ss << site.rdbuf();
+					return ss.str();
+				}
+				else
+				{
+					LogPrint ("HTTP response ", status);
+					return "";
+				}
+			}
+			else
+			{
+				LogPrint ("Can't connect to ", address);
+				return "";
+			}
+		}
+		catch (std::exception& ex)
+		{
+			LogPrint ("Failed to download ", address, " : ", ex.what ());
+			return "";
+		}
+	}
+
+	url::url(const std::string& url_s)
+	{
+		parse(url_s);
+	}
+
+	void url::parse(const std::string& url_s)
+	{
+    	const std::string prot_end("://");
+    	std::string::const_iterator prot_i = search(url_s.begin(), url_s.end(),
+                                           prot_end.begin(), prot_end.end());
+    	protocol_.reserve(distance(url_s.begin(), prot_i));
+    	transform(url_s.begin(), prot_i,
+              back_inserter(protocol_),
+              std::ptr_fun<int,int>(tolower)); // protocol is icase
+    	if( prot_i == url_s.end() )
+        	return;
+    	advance(prot_i, prot_end.length());
+    	std::string::const_iterator path_i = find(prot_i, url_s.end(), '/');
+    	host_.reserve(distance(prot_i, path_i));
+    	transform(prot_i, path_i,
+              back_inserter(host_),
+              std::ptr_fun<int,int>(tolower)); // host is icase
+    	std::string::const_iterator query_i = find(path_i, url_s.end(), '?');
+    	path_.assign(path_i, query_i);
+    	if( query_i != url_s.end() )
+        	++query_i;
+    	query_.assign(query_i, url_s.end());
+	}
+
+}
+
+
+
 
 } // Namespace end
 }

util.h

@@ -12,7 +12,17 @@ namespace util
 	void OptionParser(int argc, const char* const argv[]);
 	int GetIntArg(const std::string& strArg, int nDefault);
 	const char* GetCharArg(const std::string& strArg, const std::string& nDefault);
-
+	namespace http
+	{
+		std::string httpRequest(const std::string& address);
+		struct url {
+    			url(const std::string& url_s); // omitted copy, ==, accessors, ...
+			private:
+    			void parse(const std::string& url_s);
+			public:
+    			std::string protocol_, host_, path_, query_;
+		};
+	}
 }
 }