{"id":93570,"date":"2020-09-07T19:42:05","date_gmt":"2020-09-07T17:42:05","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-libtorrent-2-0-s-podderzhkoj-protokola-bittorrent-2"},"modified":"2020-09-07T19:42:05","modified_gmt":"2020-09-07T17:42:05","slug":"vypusk-libtorrent-2-0-s-podderzhkoj-protokola-bittorrent-2","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pl\/blog\/news\/vypusk-libtorrent-2-0-s-podderzhkoj-protokola-bittorrent-2","title":{"rendered":"Wydanie libtorrent 2.0 z obs\u0142ug\u0105 protoko\u0142u BitTorrent 2","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Przedstawiony<\/a><\/noindex> znacz\u0105ce wydanie biblioteki libtorrent 2.0<\/a><\/noindex> (znana r\u00f3wnie\u017c jako libtorrent-rasterbar), oferuj\u0105ca implementacj\u0119 protoko\u0142u BitTorrent, efektywn\u0105 pod wzgl\u0119dem zu\u017cycia pami\u0119ci i obci\u0105\u017cenia CPU. Biblioteka zastosowano<\/a><\/noindex> w takich klientach torrentowych jak Deluge<\/a><\/noindex>, qBittorrent<\/a><\/noindex>, Folx<\/a><\/noindex>, Lince<\/a><\/noindex>, Miro<\/a><\/noindex> i Flush<\/a><\/noindex> (nie myli\u0107 z inn\u0105 bibliotek\u0105 libtorrent<\/a><\/noindex>, kt\u00f3ra jest u\u017cywana w rTorrent). Kod libtorrent napisany jest w j\u0119zyku C++ i rozpowszechniany<\/a><\/noindex> na licencji BSD.<\/p>\n

Wydanie jest godne uwagi o dodanie<\/a><\/noindex> wsparcia dla protoko\u0142u BitTorrent v2<\/a><\/noindex>, w kt\u00f3rym dokonano odej\u015bcia od u\u017cycia algorytmu SHA-1, kt\u00f3ry mia\u0142 problemy<\/a><\/noindex> z dobranym kodowaniem kolizji, na korzy\u015b\u0107 SHA2-256. SHA2-256 jest stosowany zar\u00f3wno do sprawdzania integralno\u015bci blok\u00f3w danych, jak i do zapis\u00f3w w indeksach (info-dictionary), co narusza kompatybilno\u015b\u0107 z DHT i trackerami. Dla link\u00f3w magnetycznych do torrent\u00f3w z haszami SHA2-256 zaproponowano nowy prefiks \u201eurn:btmh:\u201d (dla SHA-1 i hybrydowych torrent\u00f3w u\u017cywa si\u0119 \u201eurn:btih:\u201d).<\/p>\n

Poniewa\u017c zmiana funkcji haszowania narusza kompatybilno\u015b\u0107 protoko\u0142u (pole z hashem 32 bajt\u00f3w zamiast 20 bajt\u00f3w), opracowanie specyfikacji BitTorrent v2 pocz\u0105tkowo prowadzono bez uwzgl\u0119dnienia wstecznej kompatybilno\u015bci i w sk\u0142ad zaakceptowano inne istotne zmiany, takie jak wykorzystanie drzewa Merkle w indeksach w celu zmniejszenia rozmiaru plik\u00f3w torrent i weryfikacji pobranych danych na poziomie blok\u00f3w.<\/p>\n

W\u015br\u00f3d zmian w BitTorrent v2 wyr\u00f3\u017cnia si\u0119 tak\u017ce przej\u015bcie na wi\u0105zanie pojedynczych drzew hash do ka\u017cdego pliku oraz zastosowanie wyr\u00f3wnywania plik\u00f3w w cz\u0119\u015bciach (bez dodawania wype\u0142nienia po ka\u017cdym pliku), co pozwala na eliminacj\u0119 duplikacji danych przy zachowaniu identycznych plik\u00f3w i upraszcza identyfikacj\u0119 r\u00f3\u017cnych \u017ar\u00f3de\u0142 dla plik\u00f3w. Zwi\u0119kszona efektywno\u015b\u0107 kodowania struktury katalog\u00f3w w torencie i dodano optymalizacje do obs\u0142ugi du\u017cej liczby drobnych plik\u00f3w. <\/p>\n

Aby zminimalizowa\u0107 wsp\u00f3\u0142istnienie BitTorrent v1 i BitTorrent v2, wprowadzono mo\u017cliwo\u015b\u0107 tworzenia hybrydowych plik\u00f3w torrent, kt\u00f3re opr\u00f3cz struktur z hashami SHA-1, zawieraj\u0105 r\u00f3wnie\u017c indeksy z SHA2-256.
\nWspomniane hybrydowe torrenty mog\u0105 by\u0107 u\u017cywane z klientami, kt\u00f3re obs\u0142uguj\u0105 tylko protok\u00f3\u0142 BitTorrent v1. Oczekiwana w libtorrent 2.0 obs\u0142uga protoko\u0142u WebTorrent z powodu nierozwi\u0105zanych problem\u00f3w ze stabilno\u015bci\u0105 zosta\u0142a op\u00f3\u017aniona<\/a><\/noindex> do nast\u0119pnego znacz\u0105cego wydania, kt\u00f3re nie nast\u0105pi wcze\u015bniej ni\u017c pod koniec roku. <\/p>\n

<\/a><\/noindex><\/p>\n

\u0179r\u00f3d\u0142o: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d \u0437\u043d\u0430\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0439 \u0432\u044b\u043f\u0443\u0441\u043a \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 libtorrent 2.0 (\u0438\u0437\u0432\u0435\u0441\u0442\u043d\u0430 \u0442\u0430\u043a\u0436\u0435 \u043a\u0430\u043a libtorrent-rasterbar), \u043f\u0440\u0435\u0434\u043b\u0430\u0433\u0430\u044e\u0449\u0435\u0439 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044e \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 BitTorrent, \u044d\u0444\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u0443\u044e \u0441 \u0442\u043e\u0447\u043a\u0438 \u0437\u0440\u0435\u043d\u0438\u044f \u043f\u043e\u0442\u0440\u0435\u0431\u043b\u0435\u043d\u0438\u044f \u043f\u0430\u043c\u044f\u0442\u0438 \u0438 \u043d\u0430\u0433\u0440\u0443\u0437\u043a\u0438 \u043d\u0430 CPU. \u0411\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0430 \u0437\u0430\u0434\u0435\u0439\u0441\u0442\u0432\u043e\u0432\u0430\u043d\u0430 \u0432 \u0442\u0430\u043a\u0438\u0445 \u0442\u043e\u0440\u0440\u0435\u043d\u0442-\u043a\u043b\u0438\u0435\u043d\u0442\u0430\u0445, \u043a\u0430\u043a Deluge, qBittorrent, Folx, Lince, Miro \u0438 Flush (\u043d\u0435 \u043f\u0443\u0442\u0430\u0442\u044c \u0441 \u0434\u0440\u0443\u0433\u043e\u0439 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u043e\u0439 libtorrent, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0441\u044f \u0432 rTorrent). \u041a\u043e\u0434 libtorrent \u043d\u0430\u043f\u0438\u0441\u0430\u043d \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 C++ \u0438 \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u044f\u0435\u0442\u0441\u044f […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-93570","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Wydanie libtorrent 2.0 z obs\u0142ug\u0105 protoko\u0142u BitTorrent 2 | ProHoster","description":"Zosta\u0142o zaprezentowane znacz\u0105ce wydanie biblioteki 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