fix issue with the name in single file torrents being sanitized away

src/http_parser.cpp

@@ -370,8 +370,6 @@ restart_response:
 						if (chunk_size == 0)
 						{
 							m_finished = true;
-							TORRENT_ASSERT(m_content_length < 0 || m_recv_pos - m_body_start_pos
-								- m_chunk_header_size == m_content_length);
 						}
 						header_size -= m_partial_chunk_header;
 						m_partial_chunk_header = 0;

src/torrent_info.cpp

@@ -407,6 +407,11 @@ namespace {
 			filename = p.string_ptr() + info_ptr_diff;
 			filename_len = p.string_length();
 			sanitize_append_path_element(path, p.string_value());
+			if (path.empty())
+			{
+				ec = errors::torrent_missing_name;
+				return false;
+			}
 		}
 		else
 		{

test/test_http_parser.cpp

@@ -657,3 +657,26 @@ TORRENT_TEST(invalid_chunk_2)
 	feed_bytes(parser, {reinterpret_cast<char const*>(invalid_chunked_input), sizeof(invalid_chunked_input)});
 }
 
+TORRENT_TEST(invalid_chunk_3)
+{
+	std::uint8_t const invalid_chunked_input[] = {
+		0x48, 0xff, 0xff, 0xff, 0xfd, 0x54, 0x54, 0x50, 0x2f, 0x31, 0x2e, 0x31, 0x20, 0x32, 0x30, 0x30,  // H....TTP/1.1 200
+		0x20, 0x4f, 0x4b, 0x0a, 0x54, 0x72, 0x61, 0x6e, 0x73, 0x66, 0x65, 0x72, 0x2d, 0x45, 0x6e, 0x63,  //  OK.Transfer-Enc
+		0x6f, 0x64, 0x69, 0x6e, 0x67, 0x3a, 0x20, 0x63, 0x68, 0x75, 0x6e, 0x6b, 0x65, 0x64, 0x0a, 0x44,  // oding: chunked.D
+		0x61, 0x74, 0x65, 0x3a, 0x20, 0x53, 0x61, 0x74, 0x2c, 0x20, 0x33, 0x31, 0x20, 0x41, 0x75, 0x67,  // ate: Sat, 0x31, Aug
+		0x20, 0x32, 0x30, 0x30, 0x32, 0x20, 0x30, 0x30, 0x3a, 0x32, 0x34, 0x3a, 0x30, 0x38, 0x20, 0x47,  //  2002 0x00,:0x24,:0x08, G
+		0x4d, 0x54, 0x0a, 0x43, 0x6f, 0x6e, 0x6e, 0x65, 0x63, 0x74, 0x69, 0x6f, 0x6e, 0x3a, 0x20, 0x63,  // MT.Connection: c
+		0x6c, 0x6f, 0x73, 0x65, 0x0a, 0x0a, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30,  // lose..0000000000
+		0x36, 0x34, 0x0a, 0x6c, 0x72, 0x79, 0x6d, 0x68, 0x74, 0x67, 0x6b, 0x7a, 0x71, 0x74, 0x71, 0x71,  // 0x64,.lrymhtgkzqtqq
+		0x62, 0x75, 0x71, 0x69, 0x66, 0x76, 0x69, 0x74, 0x6b, 0x70, 0x69, 0x63, 0x6f, 0x64, 0x67, 0x77,  // buqifvitkpicodgw
+		0x6d, 0x69, 0x6a, 0x64, 0x67, 0x76, 0x6b, 0x63, 0x65, 0x78, 0x64, 0x75, 0x71, 0x74, 0x6e, 0x74,  // mijdgvkcexduqtnt
+		0x6e, 0x66, 0x62, 0x75, 0x64, 0x6d, 0x6e, 0x6e, 0x62, 0x78, 0x72, 0x72, 0x63, 0x78, 0x6e, 0x70,  // nfbudmnnbxrrcxnp
+		0x66, 0x79, 0x73, 0x6f, 0x74, 0x66, 0x71, 0x7a, 0x63, 0x74, 0x77, 0x75, 0x6d, 0x6a, 0x6e, 0x63,  // fysotfqzctwumjnc
+		0x6f, 0x71, 0x77, 0x72, 0x63, 0x6d, 0x67, 0x64, 0x6c, 0x78, 0x77, 0x6f, 0x78, 0x6c, 0x64, 0x65,  // oqwrcmgdlxwoxlde
+		0x6a, 0x76, 0x73, 0x66, 0x63, 0x6b, 0x65, 0x0a, 0x30, 0x0a, 0x0a, 0x0a,              // jvsfcke.0...
+	};
+
+	http_parser parser;
+	feed_bytes(parser, {reinterpret_cast<char const*>(invalid_chunked_input), sizeof(invalid_chunked_input)});
+}
+

test/test_torrent_info.cpp

@@ -140,6 +140,7 @@ test_failing_torrent_t test_error_torrents[] =
 	{ "invalid_piece_len.torrent", errors::torrent_missing_piece_length },
 	{ "negative_piece_len.torrent", errors::torrent_missing_piece_length },
 	{ "no_name.torrent", errors::torrent_missing_name },
+	{ "bad_name.torrent", errors::torrent_missing_name },
 	{ "invalid_name.torrent", errors::torrent_missing_name },
 	{ "invalid_info.torrent", errors::torrent_missing_info },
 	{ "string.torrent", errors::torrent_is_no_dict },