fixed error handling in torrent_info constructor

ChangeLog

@@ -72,6 +72,7 @@
 	  incoming connection
 	* added more detailed instrumentation of the disk I/O thread
 
+	* fixed error handling in torrent_info constructor
 	* fixed bug in torrent_info::remap_files
 	* fix python binding for wait_for_alert
 	* only apply privileged port filter to DHT-only peers

examples/client_test.cpp

@@ -611,7 +611,7 @@ void add_torrent(libtorrent::session& ses
 	std::string filename = combine_path(save_path, t->name() + ".resume");
 
 	std::vector<char> buf;
-	if (load_file(filename.c_str(), buf) == 0)
+	if (load_file(filename.c_str(), buf, ec) == 0)
 		p.resume_data = &buf;
 
 	p.ti = t;
@@ -889,10 +889,10 @@ int main(int argc, char* argv[])
 			+ alert::stats_notification));
 
 	std::vector<char> in;
-	if (load_file(".ses_state", in) == 0)
+	error_code ec;
+	if (load_file(".ses_state", in, ec) == 0)
 	{
 		lazy_entry e;
-		error_code ec;
 		if (lazy_bdecode(&in[0], &in[0] + in.size(), e, ec) == 0)
 			ses.load_state(e);
 	}

examples/dump_torrent.cpp

@@ -59,14 +59,14 @@ int main(int argc, char* argv[])
 		return 1;
 	}
 	std::vector<char> buf(size);
-	int ret = load_file(argv[1], buf, 40 * 1000000);
+	error_code ec;
+	int ret = load_file(argv[1], buf, ec, 40 * 1000000);
 	if (ret != 0)
 	{
-		fprintf(stderr, "failed to load file: %d\n", ret);
+		fprintf(stderr, "failed to load file: %s\n", ec.message().c_str());
 		return 1;
 	}
 	lazy_entry e;
-	error_code ec;
 	int pos;
 	printf("decoding. recursion limit: %d total item count limit: %d\n"
 		, depth_limit, item_limit);

examples/rss_reader.cpp

@@ -78,10 +78,10 @@ int main(int argc, char* argv[])
 	ses.set_settings(sett);
 
 	std::vector<char> in;
-	if (load_file(".ses_state", in) == 0)
+	error_code ec;
+	if (load_file(".ses_state", in, ec) == 0)
 	{
 		lazy_entry e;
-		error_code ec;
 		if (lazy_bdecode(&in[0], &in[0] + in.size(), e, ec) == 0)
 			ses.load_state(e);
 	}

include/libtorrent/torrent_info.hpp

@@ -222,7 +222,7 @@ namespace libtorrent
 #endif
 
 	int TORRENT_EXPORT load_file(std::string const& filename
-		, std::vector<char>& v, int limit = 8000000);
+		, std::vector<char>& v, error_code& ec, int limit = 8000000);
 
 	class TORRENT_EXPORT torrent_info : public intrusive_ptr_base<torrent_info>
 	{

src/disk_io_thread.cpp

@@ -2305,6 +2305,7 @@ namespace libtorrent
 					lazy_entry const* rd = (lazy_entry const*)j.buffer;
 					TORRENT_ASSERT(rd != 0);
 					ret = j.storage->check_fastresume(*rd, j.error);
+					test_error(j);
 					break;
 				}
 				case disk_io_job::check_files:

src/session.cpp

@@ -517,6 +517,7 @@ namespace libtorrent
 
 	torrent_handle session::add_torrent(add_torrent_params const& params, error_code& ec)
 	{
+		ec.clear();
 		if (string_begins_no_case("magnet:", params.url.c_str()))
 		{
 			add_torrent_params p(params);

src/torrent_info.cpp

@@ -401,14 +401,18 @@ namespace libtorrent
 		return 1 << i;
 	}
 
-	int load_file(std::string const& filename, std::vector<char>& v, int limit)
+	int load_file(std::string const& filename, std::vector<char>& v, error_code& ec, int limit)
 	{
+		ec.clear();
 		file f;
-		error_code ec;
 		if (!f.open(filename, file::read_only, ec)) return -1;
 		size_type s = f.get_size(ec);
 		if (ec) return -1;
-		if (s > limit) return -2;
+		if (s > limit)
+		{
+			ec = error_code(errors::metadata_too_large, get_libtorrent_category());
+			return -2;
+		}
 		v.resize(s);
 		if (s == 0) return 0;
 		file::iovec_t b = {&v[0], s};
@@ -576,11 +580,11 @@ namespace libtorrent
 		, m_i2p(false)
 	{
 		std::vector<char> buf;
-		int ret = load_file(filename, buf);
-		if (ret < 0) return;
+		error_code ec;
+		int ret = load_file(filename, buf, ec);
+		if (ret < 0) throw invalid_torrent_file(ec);
 
 		lazy_entry e;
-		error_code ec;
 		if (buf.size() == 0 || lazy_bdecode(&buf[0], &buf[0] + buf.size(), e, ec) != 0)
 			throw invalid_torrent_file(ec);
 
@@ -601,11 +605,11 @@ namespace libtorrent
 		std::vector<char> buf;
 		std::string utf8;
 		wchar_utf8(filename, utf8);
-		int ret = load_file(utf8, buf);
-		if (ret < 0) return;
+		error_code ec;
+		int ret = load_file(utf8, buf, ec);
+		if (ret < 0) throw invalid_torrent_file(ec);
 
 		lazy_entry e;
-		error_code ec;
 		if (buf.size() == 0 || lazy_bdecode(&buf[0], &buf[0] + buf.size(), e, ec) != 0)
 			throw invalid_torrent_file(ec);
 
@@ -650,7 +654,7 @@ namespace libtorrent
 		, m_i2p(false)
 	{
 		std::vector<char> buf;
-		int ret = load_file(filename, buf);
+		int ret = load_file(filename, buf, ec);
 		if (ret < 0) return;
 
 		lazy_entry e;
@@ -671,7 +675,7 @@ namespace libtorrent
 		std::vector<char> buf;
 		std::string utf8;
 		wchar_utf8(filename, utf8);
-		int ret = load_file(utf8, buf);
+		int ret = load_file(utf8, buf, ec);
 		if (ret < 0) return;
 
 		lazy_entry e;

test/setup_transfer.cpp

@@ -907,9 +907,9 @@ void web_server_thread(int* port, bool ssl, bool chunked)
 				int size = range_end - range_start + 1;
 				boost::uint64_t off = idx * 64 * 1024 + range_start;
 				std::vector<char> file_buf;
-				int res = load_file("./tmp1_web_seed/seed", file_buf);
-
 				error_code ec;
+				int res = load_file("./tmp1_web_seed/seed", file_buf, ec);
+
 				if (res == -1 || file_buf.empty())
 				{
 					send_response(s, ec, 404, "Not Found", extra_header, 0);
@@ -931,7 +931,8 @@ void web_server_thread(int* port, bool ssl, bool chunked)
 			std::vector<char> file_buf;
 			// remove the / from the path
 			path = path.substr(1);
-			int res = load_file(path, file_buf);
+			error_code ec;
+			int res = load_file(path, file_buf, ec);
 			if (res == -1)
 			{
 				send_response(s, ec, 404, "Not Found", extra_header, 0);

test/test_web_seed.cpp

@@ -180,7 +180,8 @@ void save_file(char const* filename, char const* data, int size)
 sha1_hash file_hash(std::string const& name)
 {
 	std::vector<char> buf;
-	load_file(name, buf);
+	error_code ec;
+	load_file(name, buf, ec);
 	if (buf.empty()) return sha1_hash(0);
 	hasher h(&buf[0], buf.size());
 	return h.final();