{"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\/da\/blog\/news\/vypusk-libtorrent-2-0-s-podderzhkoj-protokola-bittorrent-2","title":{"rendered":"Udgivelse af libtorrent 2.0 med st\u00f8tte til BitTorrent 2-protokol","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Pr\u00e6senteret<\/a><\/noindex> betydelig udgivelse af biblioteket libtorrent 2.0<\/a><\/noindex> (kendt ogs\u00e5 som libtorrent-rasterbar), der tilbyder en implementering af BitTorrent-protokollen, effektiv i forhold til hukommelsesforbrug og CPU-belastning. Biblioteket er der blevet aktivt<\/a><\/noindex> i s\u00e5danne torrent-klienter som Deluge<\/a><\/noindex>, qBittorrent<\/a><\/noindex>, Folx<\/a><\/noindex>, Lince<\/a><\/noindex>, Miro<\/a><\/noindex> og Flush<\/a><\/noindex> (forveksl ikke med et andet bibliotek libtorrent<\/a><\/noindex>, som bruges i rTorrent). Koden til libtorrent er skrevet i C++ og distribueres<\/a><\/noindex> under BSD-licensen.<\/p>\n

Udgivelsen er bem\u00e6rkelsesv\u00e6rdig tilf\u00f8jelsen<\/a><\/noindex> for supporten af protokollen BitTorrent v2<\/a><\/noindex>, som fjerner brugen af algoritmen SHA-1, der har problemer<\/a><\/noindex> med konfliktl\u00f8sning til fordel for SHA2-256. SHA2-256 anvendes b\u00e5de til at sikre integriteten af datablokke og til poster i indeksene (info-dictionary), hvilket underminerer kompatibiliteten med DHT og trackerne. For magnetlinks til torrenter med SHA2-256 hashes er der foresl\u00e5et et nyt pr\u00e6fiks «urn:btmh:» (for SHA-1 og hybride torrenter bruges «urn:btih:»).<\/p>\n

Da udskiftningen af hash-funktionen bryder protokollens kompatibilitet (et felt med en 32-byte hash i stedet for en 20-byte), blev udviklingen af BitTorrent v2-specifikationen oprindeligt udf\u00f8rt uden hensyn til bagudkompatibilitet, og der blev accepteret andre v\u00e6sentlige \u00e6ndringer, s\u00e5som brugen af Merkle-hash-tr\u00e6er i indeksene for at reducere st\u00f8rrelsen p\u00e5 torrent-filer og kontrollere de downloadede data p\u00e5 blokniveau.<\/p>\n

Blandt \u00e6ndringerne i BitTorrent v2 er overgangen til at knytte enkelte hash-tr\u00e6er til hver fil og anvende filjustering i sektioner (uden at tilf\u00f8je ekstra udfyldning efter hver fil), hvilket eliminerer duplication af data ved at have ens filer og forenkler identifikationen af forskellige kilder til filer. Effektiviteten af kodningen af mappestrukturen i torrenten er forbedret, og der er tilf\u00f8jet optimeringer til h\u00e5ndtering af et stort antal sm\u00e5 filer. <\/p>\n

For at glatte sameksistensen mellem BitTorrent v1 og BitTorrent v2 er der implementeret muligheden for at skabe hybride torrent-filer, som inkluderer strukturer med SHA-1 hashes samt indekser med SHA2-256.
\nDe n\u00e6vnte hybride torrents kan bruges med klienter, der kun underst\u00f8tter BitTorrent v1-protokollen. Den forventede support for WebTorrent-protokollen i libtorrent 2.0 er p\u00e5 grund af ul\u00f8ste stabilitetsproblemer udskudt<\/a><\/noindex> til n\u00e6ste betydelige udgivelse, som tidligst vil komme ved \u00e5rets slutning. <\/p>\n

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

Kilde: 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 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