{"id":479194,"date":"2023-08-09T10:31:59","date_gmt":"2023-08-09T10:31:59","guid":{"rendered":""},"modified":"2023-09-05T11:18:22","modified_gmt":"2023-09-05T11:18:22","slug":"subtyping","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/subtyping\/","title":{"rendered":"Ph\u00e2n nh\u00f3m"},"content":{"rendered":"

Ph\u00e2n nh\u00f3m l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m c\u01a1 b\u1ea3n trong khoa h\u1ecdc m\u00e1y t\u00ednh v\u00e0 c\u00f4ng ngh\u1ec7 ph\u1ea7n m\u1ec1m, ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh v\u00e0 h\u1ec7 th\u1ed1ng h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng. N\u00f3 \u0111\u00f3ng m\u1ed9t vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c t\u1ea1o ra c\u00e1c h\u1ec7 th\u1ed1ng linh ho\u1ea1t v\u00e0 hi\u1ec7u qu\u1ea3, cho ph\u00e9p t\u00e1i s\u1eed d\u1ee5ng m\u00e3, \u0111a h\u00ecnh, v.v. Trong b\u1ed1i c\u1ea3nh m\u1ea1ng m\u00e1y ch\u1ee7 proxy, ph\u00e2n nh\u00f3m cho ph\u00e9p x\u1eed l\u00fd hi\u1ec7u qu\u1ea3 nhi\u1ec1u lo\u1ea1i proxy kh\u00e1c nhau, n\u00e2ng cao hi\u1ec7u su\u1ea5t, b\u1ea3o m\u1eadt v\u00e0 kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng. B\u00e0i vi\u1ebft n\u00e0y t\u00ecm hi\u1ec3u kh\u00e1i ni\u1ec7m v\u1ec1 ph\u00e2n nh\u00f3m, l\u1ecbch s\u1eed, c\u00e1ch tri\u1ec3n khai, c\u00e1c t\u00ednh n\u0103ng, lo\u1ea1i ch\u00ednh v\u00e0 m\u1ee9c \u0111\u1ed9 li\u00ean quan c\u1ee7a n\u00f3 v\u1edbi nh\u00e0 cung c\u1ea5p m\u00e1y ch\u1ee7 proxy, OneProxy.<\/p>\n

L\u1ecbch s\u1eed ngu\u1ed3n g\u1ed1c c\u1ee7a ph\u00e2n nh\u00f3m v\u00e0 s\u1ef1 \u0111\u1ec1 c\u1eadp \u0111\u1ea7u ti\u00ean c\u1ee7a n\u00f3<\/h2>\n

Kh\u00e1i ni\u1ec7m ph\u00e2n nh\u00f3m c\u00f3 t\u1eeb nh\u1eefng ng\u00e0y \u0111\u1ea7u c\u1ee7a ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh. Alan Kay, ng\u01b0\u1eddi ti\u00ean phong trong l\u0129nh v\u1ef1c l\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng, \u0111\u00e3 gi\u1edbi thi\u1ec7u thu\u1eadt ng\u1eef \u201csubtype\u201d v\u00e0o n\u0103m 1966 khi nghi\u00ean c\u1ee9u ph\u00e1t tri\u1ec3n Simula, ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u1ea7u ti\u00ean. Trong Simula, Kay \u0111\u00e3 s\u1eed d\u1ee5ng c\u00e1c ki\u1ec3u con \u0111\u1ec3 t\u1ea1o ra h\u1ec7 th\u1ed1ng ph\u00e2n c\u1ea5p c\u1ee7a c\u00e1c l\u1edbp, cho ph\u00e9p s\u1eed d\u1ee5ng l\u1ea1i m\u00e3 v\u00e0 cung c\u1ea5p n\u1ec1n t\u1ea3ng cho t\u00ednh \u0111a h\u00ecnh.<\/p>\n

Th\u00f4ng tin chi ti\u1ebft v\u1ec1 ph\u00e2n nh\u00f3m: M\u1edf r\u1ed9ng ch\u1ee7 \u0111\u1ec1<\/h2>\n

B\u1ea3n ch\u1ea5t c\u1ee7a ph\u00e2n nh\u00f3m<\/h3>\n

Ph\u00e2n nh\u00f3m l\u00e0 m\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c lo\u1ea1i, trong \u0111\u00f3 m\u1ed9t lo\u1ea1i c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c coi l\u00e0 phi\u00ean b\u1ea3n chuy\u00ean bi\u1ec7t c\u1ee7a lo\u1ea1i kh\u00e1c. N\u00f3 cho ph\u00e9p t\u1ea1o ra c\u00e1c h\u1ec7 th\u1ed1ng ph\u00e2n c\u1ea5p, trong \u0111\u00f3 m\u1ed7i ki\u1ec3u con k\u1ebf th\u1eeba c\u00e1c thu\u1ed9c t\u00ednh v\u00e0 h\u00e0nh vi t\u1eeb si\u00eau ki\u1ec3u c\u1ee7a n\u00f3 \u0111\u1ed3ng th\u1eddi c\u00f3 kh\u1ea3 n\u0103ng b\u1ed5 sung th\u00eam c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m \u0111\u1ed9c \u0111\u00e1o c\u1ee7a ri\u00eang n\u00f3. M\u1ed1i quan h\u1ec7 n\u00e0y t\u1ea1o \u0111i\u1ec1u ki\u1ec7n thu\u1eadn l\u1ee3i cho vi\u1ec7c t\u1ed5 ch\u1ee9c m\u00e3, kh\u1ea3 n\u0103ng s\u1eed d\u1ee5ng l\u1ea1i v\u00e0 nguy\u00ean t\u1eafc thay th\u1ebf.<\/p>\n

\u0110a h\u00ecnh v\u00e0 ph\u00e2n nh\u00f3m<\/h3>\n

M\u1ed9t trong nh\u1eefng l\u1ee3i \u00edch ch\u00ednh c\u1ee7a vi\u1ec7c ph\u00e2n nh\u00f3m l\u00e0 cho ph\u00e9p \u0111a h\u00ecnh. T\u00ednh \u0111a h\u00ecnh cho ph\u00e9p c\u00e1c ki\u1ec3u con kh\u00e1c nhau \u0111\u01b0\u1ee3c coi l\u00e0 c\u00e1c th\u1ec3 hi\u1ec7n c\u1ee7a si\u00eau ki\u1ec3u chung c\u1ee7a ch\u00fang, th\u00fac \u0111\u1ea9y t\u00ednh linh ho\u1ea1t c\u1ee7a m\u00e3 v\u00e0 gi\u1ea3m nhu c\u1ea7u ki\u1ec3m tra ki\u1ec3u r\u00f5 r\u00e0ng. B\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng t\u00ednh \u0111a h\u00ecnh, c\u00e1c nh\u00e0 cung c\u1ea5p m\u00e1y ch\u1ee7 proxy nh\u01b0 OneProxy c\u00f3 th\u1ec3 qu\u1ea3n l\u00fd hi\u1ec7u qu\u1ea3 nhi\u1ec1u lo\u1ea1i proxy kh\u00e1c nhau m\u00e0 kh\u00f4ng c\u1ea7n c\u1ea5u tr\u00fac ph\u00e2n nh\u00e1nh ph\u1ee9c t\u1ea1p.<\/p>\n

Ph\u00e2n nh\u00f3m h\u00e0nh vi<\/h3>\n

Ngo\u00e0i c\u00e1c m\u1ed1i quan h\u1ec7 ki\u1ec3u con c\u1ed5 \u0111i\u1ec3n d\u1ef1a tr\u00ean t\u00ednh k\u1ebf th\u1eeba, c\u00f2n c\u00f3 m\u1ed9t kh\u00e1i ni\u1ec7m kh\u00e1c g\u1ecdi l\u00e0 \u201cph\u00e2n ki\u1ec3u h\u00e0nh vi\u201d. Ph\u00e2n nh\u00f3m h\u00e0nh vi nh\u1ea5n m\u1ea1nh t\u1ea7m quan tr\u1ecdng c\u1ee7a h\u00e0nh vi c\u1ee7a m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng h\u01a1n l\u00e0 ph\u00e2n c\u1ea5p l\u1edbp ho\u1eb7c ki\u1ec3u c\u1ee7a n\u00f3. Theo c\u00e1ch ti\u1ebfp c\u1eadn n\u00e0y, hai lo\u1ea1i \u0111\u01b0\u1ee3c coi l\u00e0 lo\u1ea1i ph\u1ee5 n\u1ebfu ch\u00fang th\u1ec3 hi\u1ec7n h\u00e0nh vi gi\u1ed1ng h\u1ec7t nhau, b\u1ea5t k\u1ec3 m\u1ed1i quan h\u1ec7 th\u1eeba k\u1ebf th\u1ef1c t\u1ebf c\u1ee7a ch\u00fang. C\u00e1ch ti\u1ebfp c\u1eadn n\u00e0y c\u00f3 th\u1ec3 n\u00e2ng cao t\u00ednh linh ho\u1ea1t v\u00e0 th\u00fac \u0111\u1ea9y l\u1eadp tr\u00ecnh d\u1ef1a tr\u00ean giao di\u1ec7n.<\/p>\n

C\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a ph\u00e2n nh\u00f3m: C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a ph\u00e2n nh\u00f3m<\/h2>\n

V\u1ec1 c\u1ed1t l\u00f5i, vi\u1ec7c ph\u00e2n nh\u00f3m \u0111\u1ea1t \u0111\u01b0\u1ee3c th\u00f4ng qua k\u1ebf th\u1eeba l\u1edbp trong c\u00e1c ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng. Khi m\u1ed9t l\u1edbp k\u1ebf th\u1eeba t\u1eeb m\u1ed9t l\u1edbp kh\u00e1c, n\u00f3 c\u00f3 quy\u1ec1n truy c\u1eadp v\u00e0o c\u00e1c thu\u1ed9c t\u00ednh v\u00e0 ph\u01b0\u01a1ng th\u1ee9c c\u1ee7a l\u1edbp cha, tr\u1edf th\u00e0nh m\u1ed9t ki\u1ec3u con c\u1ee7a l\u1edbp cha m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p c\u00e1c phi\u00ean b\u1ea3n c\u1ee7a ki\u1ec3u con \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u1edf b\u1ea5t k\u1ef3 n\u01a1i n\u00e0o \u0111\u01b0\u1ee3c mong \u0111\u1ee3i c\u00e1c phi\u00ean b\u1ea3n c\u1ee7a si\u00eau ki\u1ec3u.<\/p>\n

V\u00ed d\u1ee5: h\u00e3y xem x\u00e9t m\u1ed9t m\u1ea1ng m\u00e1y ch\u1ee7 proxy c\u00f3 nhi\u1ec1u lo\u1ea1i proxy kh\u00e1c nhau nh\u01b0 proxy HTTP, SOCKS v\u00e0 SSL. C\u00e1c lo\u1ea1i proxy n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u1ed5 ch\u1ee9c th\u00e0nh m\u1ed9t h\u1ec7 th\u1ed1ng ph\u00e2n c\u1ea5p lo\u1ea1i ph\u1ee5, v\u1edbi lo\u1ea1i \u201cProxy\u201d chung \u1edf tr\u00ean c\u00f9ng. C\u00e1c lo\u1ea1i chuy\u00ean bi\u1ec7t h\u01a1n, ch\u1eb3ng h\u1ea1n nh\u01b0 \u201cHTTPProxy\u201d, \u201cSOCKSProxy\u201d v\u00e0 \u201cSSLProxy\u201d, c\u00f3 th\u1ec3 k\u1ebf th\u1eeba t\u1eeb lo\u1ea1i \u201cProxy\u201d, k\u1ebf th\u1eeba c\u00e1c t\u00ednh n\u0103ng chung c\u1ee7a n\u00f3 \u0111\u1ed3ng th\u1eddi c\u00f3 kh\u1ea3 n\u0103ng b\u1ed5 sung c\u00e1c ch\u1ee9c n\u0103ng c\u1ee5 th\u1ec3 c\u1ee7a ri\u00eang ch\u00fang.<\/p>\n

Ph\u00e2n t\u00edch c\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a ph\u00e2n nh\u00f3m<\/h2>\n

Ph\u00e2n nh\u00f3m mang l\u1ea1i m\u1ed9t s\u1ed1 t\u00ednh n\u0103ng quan tr\u1ecdng cho vi\u1ec7c ph\u00e1t tri\u1ec3n ph\u1ea7n m\u1ec1m v\u00e0 m\u1ea1ng m\u00e1y ch\u1ee7 proxy:<\/p>\n

    \n
  1. \n

    Kh\u1ea3 n\u0103ng s\u1eed d\u1ee5ng l\u1ea1i m\u00e3:<\/strong> Ph\u00e2n lo\u1ea1i cho ph\u00e9p x\u00e1c \u0111\u1ecbnh ch\u1ee9c n\u0103ng chung trong si\u00eau ki\u1ec3u, l\u00e0m cho n\u00f3 c\u00f3 s\u1eb5n cho t\u1ea5t c\u1ea3 c\u00e1c ki\u1ec3u con c\u1ee7a n\u00f3. \u0110i\u1ec1u n\u00e0y l\u00e0m gi\u1ea3m s\u1ef1 tr\u00f9ng l\u1eb7p m\u00e3 v\u00e0 t\u0103ng c\u01b0\u1eddng kh\u1ea3 n\u0103ng b\u1ea3o tr\u00ec.<\/p>\n<\/li>\n

  2. \n

    \u0110a h\u00ecnh:<\/strong> Kh\u1ea3 n\u0103ng coi c\u00e1c ki\u1ec3u con nh\u01b0 c\u00e1c th\u1ec3 hi\u1ec7n c\u1ee7a si\u00eau ki\u1ec3u chung c\u1ee7a ch\u00fang gi\u00fap \u0111\u01a1n gi\u1ea3n h\u00f3a m\u00e3 v\u00e0 cho ph\u00e9p tri\u1ec3n khai linh ho\u1ea1t h\u01a1n.<\/p>\n<\/li>\n

  3. \n

    H\u1ec7 th\u1ed1ng ph\u00e2n c\u1ea5p c\u00f3 t\u1ed5 ch\u1ee9c:<\/strong> Vi\u1ec7c ph\u00e2n nh\u00f3m t\u1ea1o \u0111i\u1ec1u ki\u1ec7n thu\u1eadn l\u1ee3i cho vi\u1ec7c t\u1ea1o ra c\u00e1c h\u1ec7 th\u1ed1ng ph\u00e2n c\u1ea5p r\u00f5 r\u00e0ng th\u1ec3 hi\u1ec7n m\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c lo\u1ea1i kh\u00e1c nhau, c\u1ea3i thi\u1ec7n c\u1ea5u tr\u00fac m\u00e3 v\u00e0 kh\u1ea3 n\u0103ng \u0111\u1ecdc.<\/p>\n<\/li>\n

  4. \n

    Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng:<\/strong> C\u00e1c lo\u1ea1i proxy m\u1edbi c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng \u0111\u01b0\u1ee3c th\u00eam v\u00e0o m\u1ea1ng b\u1eb1ng c\u00e1ch x\u00e1c \u0111\u1ecbnh ch\u00fang l\u00e0 lo\u1ea1i ph\u1ee5 c\u1ee7a c\u00e1c lo\u1ea1i proxy hi\u1ec7n c\u00f3, k\u1ebf th\u1eeba c\u00e1c t\u00ednh n\u0103ng c\u1ee7a ch\u00fang.<\/p>\n<\/li>\n

  5. \n

    Kh\u1ea3 n\u0103ng thay th\u1ebf cho nhau:<\/strong> C\u00e1c ki\u1ec3u con c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng thay th\u1ebf cho nhau v\u1edbi si\u00eau ki\u1ec3u c\u1ee7a ch\u00fang, th\u00fac \u0111\u1ea9y t\u00ednh m\u00f4 \u0111un v\u00e0 t\u00ednh linh ho\u1ea1t.<\/p>\n<\/li>\n<\/ol>\n

    C\u00e1c ki\u1ec3u ph\u00e2n nh\u00f3m: S\u1eed d\u1ee5ng b\u1ea3ng v\u00e0 danh s\u00e1ch<\/h2>\n

    Trong c\u00e1c ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh, ph\u00e2n nh\u00f3m c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ph\u00e2n th\u00e0nh hai lo\u1ea1i ch\u00ednh: ph\u00e2n nh\u00f3m danh ngh\u0129a<\/strong> V\u00e0 ph\u00e2n nh\u00f3m c\u1ea5u tr\u00fac<\/strong>.<\/p>\n

    Ph\u00e2n nh\u00f3m danh ngh\u0129a<\/h3>\n

    Ph\u00e2n nh\u00f3m danh ngh\u0129a d\u1ef1a tr\u00ean c\u00e1c khai b\u00e1o ki\u1ec3u r\u00f5 r\u00e0ng v\u00e0 h\u1ec7 th\u1ed1ng ph\u00e2n c\u1ea5p l\u1edbp. Trong c\u00e1ch ti\u1ebfp c\u1eadn n\u00e0y, m\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c lo\u1ea1i d\u1ef1a tr\u00ean t\u00ean c\u1ee7a ch\u00fang ho\u1eb7c ch\u00fa th\u00edch lo\u1ea1i r\u00f5 r\u00e0ng. C\u00e1c ng\u00f4n ng\u1eef nh\u01b0 Java v\u00e0 C++ ch\u1ee7 y\u1ebfu s\u1eed d\u1ee5ng ph\u00e2n nh\u00f3m danh ngh\u0129a.<\/p>\n

    Ph\u00e2n nh\u00f3m c\u1ea5u tr\u00fac<\/h3>\n

    Ph\u00e2n lo\u1ea1i c\u1ea5u tr\u00fac, c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 "g\u00f5 v\u1ecbt", x\u00e1c \u0111\u1ecbnh ph\u00e2n nh\u00f3m d\u1ef1a tr\u00ean c\u1ea5u tr\u00fac ho\u1eb7c h\u00ecnh d\u1ea1ng c\u1ee7a c\u00e1c lo\u1ea1i. Hai lo\u1ea1i \u0111\u01b0\u1ee3c coi l\u00e0 ki\u1ec3u con n\u1ebfu ch\u00fang c\u00f3 chung b\u1ed9 thu\u1ed9c t\u00ednh v\u00e0 ph\u01b0\u01a1ng th\u1ee9c, b\u1ea5t k\u1ec3 t\u00ean c\u1ee7a ch\u00fang l\u00e0 g\u00ec. C\u00e1c ng\u00f4n ng\u1eef nh\u01b0 Python v\u00e0 TypeScript h\u1ed7 tr\u1ee3 ph\u00e2n nh\u00f3m c\u1ea5u tr\u00fac.<\/p>\n

    D\u01b0\u1edbi \u0111\u00e2y l\u00e0 so s\u00e1nh gi\u1eefa ph\u00e2n nh\u00f3m danh ngh\u0129a v\u00e0 c\u1ea5u tr\u00fac:<\/p>\n\n\n\n\n\n\n\n\n\n
    T\u00ednh n\u0103ng<\/th>\nPh\u00e2n nh\u00f3m danh ngh\u0129a<\/th>\nPh\u00e2n nh\u00f3m c\u1ea5u tr\u00fac<\/th>\n<\/tr>\n<\/thead>\n
    Y\u1ebfu t\u1ed1 quy\u1ebft \u0111\u1ecbnh<\/td>\nNh\u1eadp t\u00ean v\u00e0 ph\u00e2n c\u1ea5p<\/td>\nC\u1ea5u tr\u00fac v\u00e0 kh\u1ea3 n\u0103ng<\/td>\n<\/tr>\n
    R\u00e0ng bu\u1ed9c khai b\u00e1o<\/td>\nCh\u00fa th\u00edch lo\u1ea1i r\u00f5 r\u00e0ng<\/td>\nB\u1ed9 thu\u1ed9c t\u00ednh v\u00e0 ph\u01b0\u01a1ng th\u1ee9c d\u00f9ng chung<\/td>\n<\/tr>\n
    Ng\u00f4n ng\u1eef m\u1eabu<\/td>\nJava, C++, Swift<\/td>\nPython, TypeScript<\/td>\n<\/tr>\n
    Uy\u1ec3n chuy\u1ec3n<\/td>\nC\u1ee9ng r\u1eafn<\/td>\nLinh ho\u1ea1t<\/td>\n<\/tr>\n
    Ki\u1ec3m tra bi\u00ean so\u1ea1n<\/td>\nT\u0129nh<\/td>\nT\u0129nh ho\u1eb7c \u0111\u1ed9ng<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    C\u00e1ch s\u1eed d\u1ee5ng ph\u00e2n nh\u00f3m, v\u1ea5n \u0111\u1ec1 v\u00e0 gi\u1ea3i ph\u00e1p<\/h2>\n

    S\u1eed d\u1ee5ng ph\u00e2n nh\u00f3m trong m\u1ea1ng m\u00e1y ch\u1ee7 proxy<\/h3>\n

    Trong b\u1ed1i c\u1ea3nh m\u1ea1ng m\u00e1y ch\u1ee7 proxy, vi\u1ec7c ph\u00e2n nh\u00f3m c\u00f3 th\u1ec3 t\u0103ng c\u01b0\u1eddng \u0111\u00e1ng k\u1ec3 vi\u1ec7c x\u1eed l\u00fd c\u00e1c lo\u1ea1i proxy kh\u00e1c nhau. B\u1eb1ng c\u00e1ch t\u1ea1o h\u1ec7 th\u1ed1ng ph\u00e2n c\u1ea5p lo\u1ea1i ph\u1ee5 cho c\u00e1c giao th\u1ee9c proxy kh\u00e1c nhau, OneProxy c\u00f3 th\u1ec3 tri\u1ec3n khai c\u00e1c t\u00ednh n\u0103ng ph\u1ed5 bi\u1ebfn trong lo\u1ea1i \u201cProxy\u201d chung \u0111\u1ed3ng th\u1eddi cho ph\u00e9p c\u00e1c h\u00e0nh vi chuy\u00ean bi\u1ec7t trong c\u00e1c lo\u1ea1i ph\u1ee5.<\/p>\n

    V\u00ed d\u1ee5: n\u1ebfu c\u00f3 nhu c\u1ea7u x\u1eed l\u00fd proxy HTTP, SOCKS v\u00e0 SSL th\u00ec m\u1ed7i lo\u1ea1i proxy c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n d\u01b0\u1edbi d\u1ea1ng m\u1ed9t lo\u1ea1i ph\u1ee5 c\u1ee7a lo\u1ea1i \u201cProxy\u201d. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p OneProxy x\u1eed l\u00fd c\u00e1c phi\u00ean b\u1ea3n c\u1ee7a c\u00e1c lo\u1ea1i proxy kh\u00e1c nhau m\u1ed9t c\u00e1ch th\u1ed1ng nh\u1ea5t, \u0111\u01a1n gi\u1ea3n h\u00f3a vi\u1ec7c qu\u1ea3n l\u00fd v\u00e0 gi\u1ea3m \u0111\u1ed9 ph\u1ee9c t\u1ea1p.<\/p>\n

    V\u1ea5n \u0111\u1ec1 v\u00e0 gi\u1ea3i ph\u00e1p<\/h3>\n

    M\u1eb7c d\u00f9 ph\u00e2n nh\u00f3m mang l\u1ea1i nhi\u1ec1u l\u1ee3i \u00edch nh\u01b0ng n\u00f3 c\u0169ng c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn m\u1ed9t s\u1ed1 th\u00e1ch th\u1ee9c nh\u1ea5t \u0111\u1ecbnh, ch\u1eb3ng h\u1ea1n nh\u01b0:<\/p>\n

      \n
    1. \n

      \u0110\u1ed9 ph\u1ee9c t\u1ea1p c\u1ee7a h\u1ec7 th\u1ed1ng ph\u00e2n c\u1ea5p k\u1ebf th\u1eeba:<\/strong> H\u1ec7 th\u1ed1ng ph\u00e2n c\u1ea5p k\u1ebf th\u1eeba s\u00e2u v\u00e0 ph\u1ee9c t\u1ea1p c\u00f3 th\u1ec3 tr\u1edf n\u00ean kh\u00f3 qu\u1ea3n l\u00fd v\u00e0 duy tr\u00ec, d\u1eabn \u0111\u1ebfn nguy c\u01a1 ph\u00ecnh to m\u00e3.<\/p>\n<\/li>\n

    2. \n

      H\u00e0nh vi kh\u00f4ng nh\u1ea5t qu\u00e1n trong c\u00e1c ki\u1ec3u con:<\/strong> C\u00e1c ki\u1ec3u con c\u00f3 th\u1ec3 ghi \u0111\u00e8 ho\u1eb7c th\u00eam h\u00e0nh vi m\u1edbi, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 g\u00e2y ra s\u1ef1 kh\u00f4ng nh\u1ea5t qu\u00e1n v\u00e0 k\u1ebft qu\u1ea3 kh\u00f4ng mong mu\u1ed1n.<\/p>\n<\/li>\n<\/ol>\n

      \u0110\u1ec3 gi\u1ea3m thi\u1ec3u nh\u1eefng v\u1ea5n \u0111\u1ec1 n\u00e0y, c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c m\u1eabu thi\u1ebft k\u1ebf ph\u00f9 h\u1ee3p, ch\u1eb3ng h\u1ea1n nh\u01b0 \u01b0u ti\u00ean th\u00e0nh ph\u1ea7n h\u01a1n t\u00ednh k\u1ebf th\u1eeba. Ngo\u00e0i ra, vi\u1ec7c l\u1eadp k\u1ebf ho\u1ea1ch c\u1ea9n th\u1eadn v\u1ec1 h\u1ec7 th\u1ed1ng ph\u00e2n c\u1ea5p ki\u1ec3u con c\u00f3 th\u1ec3 gi\u00fap duy tr\u00ec s\u1ef1 c\u00e2n b\u1eb1ng gi\u1eefa vi\u1ec7c s\u1eed d\u1ee5ng l\u1ea1i m\u00e3 v\u00e0 t\u00ednh linh ho\u1ea1t.<\/p>\n

      C\u00e1c \u0111\u1eb7c \u0111i\u1ec3m ch\u00ednh v\u00e0 so s\u00e1nh v\u1edbi c\u00e1c thu\u1eadt ng\u1eef t\u01b0\u01a1ng t\u1ef1<\/h2>\n\n\n\n\n\n\n\n\n
      Thu\u1eadt ng\u1eef<\/th>\n\u0110\u1eb7c tr\u01b0ng<\/th>\nSo s\u00e1nh<\/th>\n<\/tr>\n<\/thead>\n
      Ph\u00e2n nh\u00f3m<\/td>\nM\u1ed1i quan h\u1ec7 ph\u00e2n c\u1ea5p gi\u1eefa c\u00e1c lo\u1ea1i<\/td>\nM\u1ed9t ki\u1ec3u con l\u00e0 m\u1ed9t phi\u00ean b\u1ea3n \u0111\u1eb7c bi\u1ec7t c\u1ee7a si\u00eau ki\u1ec3u c\u1ee7a n\u00f3<\/td>\n<\/tr>\n
      \u0110a h\u00ecnh<\/td>\nX\u1eed l\u00fd c\u00e1c ki\u1ec3u con nh\u01b0 c\u00e1c th\u1ec3 hi\u1ec7n c\u1ee7a m\u1ed9t si\u00eau ki\u1ec3u chung<\/td>\nK\u00edch ho\u1ea1t b\u1eb1ng c\u00e1ch g\u00f5 ph\u1ee5<\/td>\n<\/tr>\n
      Di s\u1ea3n<\/td>\nC\u01a1 ch\u1ebf t\u00e1i s\u1eed d\u1ee5ng m\u00e3 th\u00f4ng qua h\u1ec7 th\u1ed1ng ph\u00e2n c\u1ea5p l\u1edbp<\/td>\n\u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 thi\u1ebft l\u1eadp c\u00e1c m\u1ed1i quan h\u1ec7 ph\u00e2n nh\u00f3m<\/td>\n<\/tr>\n
      Ph\u00e2n nh\u00f3m h\u00e0nh vi<\/td>\nPh\u00e2n nh\u00f3m d\u1ef1a tr\u00ean h\u00e0nh vi t\u01b0\u01a1ng t\u1ef1, kh\u00f4ng ph\u00e2n c\u1ea5p<\/td>\nB\u1ed5 sung cho vi\u1ec7c ph\u00e2n nh\u00f3m c\u1ed5 \u0111i\u1ec3n trong OOP<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      Quan \u0111i\u1ec3m v\u00e0 c\u00f4ng ngh\u1ec7 t\u01b0\u01a1ng lai li\u00ean quan \u0111\u1ebfn ph\u00e2n nh\u00f3m<\/h2>\n

      Ph\u00e2n lo\u1ea1i l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m \u0111\u00e3 c\u00f3 t\u1eeb l\u00e2u trong l\u1eadp tr\u00ecnh v\u00e0 \u0111\u01b0\u1ee3c k\u1ef3 v\u1ecdng s\u1ebd v\u1eabn l\u00e0 m\u1ed9t kh\u00eda c\u1ea1nh c\u01a1 b\u1ea3n c\u1ee7a c\u00f4ng ngh\u1ec7 ph\u1ea7n m\u1ec1m. Khi c\u00e1c ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh ph\u00e1t tri\u1ec3n v\u00e0 c\u00e1c m\u00f4 h\u00ecnh m\u1edbi xu\u1ea5t hi\u1ec7n, vi\u1ec7c ph\u00e2n nh\u00f3m c\u00f3 th\u1ec3 s\u1ebd ti\u1ebfp t\u1ee5c \u0111\u00f3ng m\u1ed9t vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c t\u1ed5 ch\u1ee9c m\u00e3, kh\u1ea3 n\u0103ng s\u1eed d\u1ee5ng l\u1ea1i v\u00e0 t\u00ednh \u0111a h\u00ecnh.<\/p>\n

      V\u1edbi s\u1ef1 ra \u0111\u1eddi c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng ki\u1ec3u ch\u1eef v\u00e0 t\u00ednh n\u0103ng ng\u00f4n ng\u1eef ti\u00ean ti\u1ebfn, c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n c\u00f3 th\u1ec3 c\u00f3 nhi\u1ec1u c\u00f4ng c\u1ee5 m\u1ea1nh m\u1ebd h\u01a1n \u0111\u1ec3 th\u1ec3 hi\u1ec7n v\u00e0 th\u1ef1c thi c\u00e1c m\u1ed1i quan h\u1ec7 ki\u1ec3u con. Ngo\u00e0i ra, nh\u1eefng ti\u1ebfn b\u1ed9 trong ph\u00e2n nh\u00f3m h\u00e0nh vi c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn c\u00e1c h\u1ec7 th\u1ed1ng linh ho\u1ea1t v\u00e0 m\u1ea1nh m\u1ebd h\u01a1n, trong \u0111\u00f3 c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng c\u00f3 h\u1ec7 th\u1ed1ng ph\u00e2n c\u1ea5p kh\u00e1c nhau v\u1eabn c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng thay th\u1ebf cho nhau d\u1ef1a tr\u00ean h\u00e0nh vi c\u1ee7a ch\u00fang.<\/p>\n

      C\u00e1ch s\u1eed d\u1ee5ng ho\u1eb7c li\u00ean k\u1ebft m\u00e1y ch\u1ee7 proxy v\u1edbi ph\u00e2n nh\u00f3m<\/h2>\n

      M\u1ea1ng m\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c h\u01b0\u1edfng l\u1ee3i \u0111\u00e1ng k\u1ec3 t\u1eeb vi\u1ec7c ph\u00e2n nh\u00f3m. B\u1eb1ng c\u00e1ch tri\u1ec3n khai h\u1ec7 th\u1ed1ng ph\u00e2n c\u1ea5p lo\u1ea1i ph\u1ee5 cho c\u00e1c giao th\u1ee9c proxy kh\u00e1c nhau, c\u00e1c nh\u00e0 cung c\u1ea5p nh\u01b0 OneProxy c\u00f3 th\u1ec3 qu\u1ea3n l\u00fd nhi\u1ec1u proxy kh\u00e1c nhau m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3. C\u00e1ch ti\u1ebfp c\u1eadn n\u00e0y cho ph\u00e9p h\u1ecd chia s\u1ebb ch\u1ee9c n\u0103ng chung gi\u1eefa c\u00e1c lo\u1ea1i proxy kh\u00e1c nhau, d\u1eabn \u0111\u1ebfn m\u1ed9t c\u01a1 s\u1edf m\u00e3 c\u00f3 t\u00ednh m\u00f4-\u0111un h\u01a1n v\u00e0 d\u1ec5 b\u1ea3o tr\u00ec h\u01a1n.<\/p>\n

      V\u00ed d\u1ee5: OneProxy c\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh lo\u1ea1i \u201cProxy\u201d chung bao g\u1ed3m c\u00e1c t\u00ednh n\u0103ng \u0111\u01b0\u1ee3c chia s\u1ebb nh\u01b0 l\u1ecdc IP, x\u1eed l\u00fd y\u00eau c\u1ea7u v\u00e0 ghi nh\u1eadt k\u00fd. Sau \u0111\u00f3, c\u00e1c lo\u1ea1i ph\u1ee5 nh\u01b0 \u201cHTTPProxy\u201d v\u00e0 \u201cSOCKSProxy\u201d c\u00f3 th\u1ec3 k\u1ebf th\u1eeba t\u1eeb \u201cProxy\u201d trong khi m\u1edf r\u1ed9ng n\u00f3 b\u1eb1ng c\u00e1c h\u00e0nh vi d\u00e0nh ri\u00eang cho giao th\u1ee9c.<\/p>\n

      Li\u00ean k\u1ebft li\u00ean quan<\/h2>\n

      \u0110\u1ec3 bi\u1ebft th\u00eam th\u00f4ng tin v\u1ec1 ph\u00e2n nh\u00f3m v\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng c\u1ee7a n\u00f3:<\/p>\n

        \n
      1. Kh\u00e1i ni\u1ec7m l\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng<\/a><\/li>\n
      2. Ph\u00e2n nh\u00f3m danh ngh\u0129a v\u00e0 c\u1ea5u tr\u00fac<\/a><\/li>\n
      3. Nguy\u00ean l\u00fd thay th\u1ebf Liskov<\/a><\/li>\n
      4. M\u1ea1ng m\u00e1y ch\u1ee7 proxy v\u00e0 tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng c\u1ee7a ch\u00fang<\/a><\/li>\n<\/ol>\n

        T\u00f3m l\u1ea1i, ph\u00e2n nh\u00f3m l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m m\u1ea1nh m\u1ebd l\u00e0m n\u1ec1n t\u1ea3ng cho nhi\u1ec1u kh\u00eda c\u1ea1nh c\u1ee7a ph\u00e1t tri\u1ec3n ph\u1ea7n m\u1ec1m hi\u1ec7n \u0111\u1ea1i, bao g\u1ed3m c\u1ea3 m\u1ea1ng m\u00e1y ch\u1ee7 proxy. Hi\u1ec3u v\u1ec1 ph\u00e2n nh\u00f3m v\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng kh\u00e1c nhau c\u1ee7a n\u00f3 c\u00f3 th\u1ec3 trao quy\u1ec1n cho c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n v\u00e0 nh\u00e0 cung c\u1ea5p proxy nh\u01b0 OneProxy x\u00e2y d\u1ef1ng c\u00e1c h\u1ec7 th\u1ed1ng c\u00f3 th\u1ec3 m\u1edf r\u1ed9ng, linh ho\u1ea1t v\u00e0 hi\u1ec7u qu\u1ea3 cho ng\u01b0\u1eddi d\u00f9ng c\u1ee7a h\u1ecd.<\/p>","protected":false},"featured_media":479195,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-479194","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about Subtyping: Understanding the Power of Type Hierarchies in Proxy Server Networks<\/mark>","faq_items":[{"question":"What is subtyping, and how does it relate to proxy server networks?","answer":"

        Subtyping is a concept in programming where one type is considered a specialized version of another type. In the context of proxy server networks, subtyping allows for the efficient handling of various proxy types. By creating a subtype hierarchy, common functionality can be defined in a generic \"Proxy\" type, while specialized behaviors are implemented in the subtypes like \"HTTPProxy,\" \"SOCKSProxy,\" and \"SSLProxy.\" This approach simplifies proxy management and promotes code reusability and flexibility.<\/p>"},{"question":"Who introduced the concept of subtyping, and when was it first mentioned?","answer":"

        Subtyping was introduced by Alan Kay, a pioneer in object-oriented programming, in 1966 while working on the development of the Simula programming language. The term \"subtype\" was first mentioned in the context of creating hierarchies of classes to enable code reuse and polymorphism.<\/p>"},{"question":"How does subtyping work internally?","answer":"

        Subtyping is achieved through class inheritance in object-oriented programming languages. When one class inherits from another, it becomes a subtype of the parent class and gains access to its properties and methods. This enables instances of the subtype to be used wherever instances of the supertype are expected, promoting code reusability and polymorphism.<\/p>"},{"question":"What are the key features of subtyping?","answer":"

        The key features of subtyping include:<\/p>

        1. Code Reusability: Subtyping allows common functionality to be defined in a supertype, reducing code duplication.<\/li>
        2. Polymorphism: Subtypes can be treated as instances of their common supertype, enabling flexible implementations.<\/li>
        3. Organized Hierarchies: Subtyping facilitates the creation of clear hierarchies that represent relationships between different types.<\/li>
        4. Extensibility: New types can be easily added to the hierarchy as subtypes of existing types, inheriting their features.<\/li>
        5. Interchangeability: Subtypes can be used interchangeably with their supertype, promoting modularity and flexibility.<\/li><\/ol>"},{"question":"What types of subtyping exist in programming languages?","answer":"

          There are two main types of subtyping:<\/p>

          1. Nominal Subtyping: It relies on explicit type declarations and class hierarchies, where types are related based on their names or explicit type annotations. Languages like Java and C++ predominantly use nominal subtyping.<\/p><\/li>

          2. Structural Subtyping: Also known as \"duck typing,\" it determines subtyping based on the structure or shape of types. Two types are considered subtypes if they share the same set of properties and methods, regardless of their names. Languages like Python and TypeScript support structural subtyping.<\/p><\/li><\/ol>"},{"question":"How can subtyping be used in proxy server networks?","answer":"

            In proxy server networks, subtyping can significantly enhance proxy management. By organizing proxy types into a subtype hierarchy, providers like OneProxy can implement shared functionality in a generic \"Proxy\" type and allow specialized behaviors in the subtypes. This approach simplifies proxy handling, reduces complexity, and promotes code reusability.<\/p>"},{"question":"What are the potential problems with subtyping, and how can they be addressed?","answer":"

            Some potential problems with subtyping include:<\/p>

            1. Inheritance Hierarchy Complexity: Deep and complex inheritance hierarchies can become challenging to manage and maintain.<\/p><\/li>

            2. Inconsistent Behavior in Subtypes: Subtypes may override or add new behavior, leading to inconsistencies and unexpected results.<\/p><\/li><\/ol>

              To address these issues, developers can use proper design patterns, like favoring composition over inheritance, and carefully plan the subtype hierarchy to maintain a balance between code reuse and flexibility.<\/p>"},{"question":"How does subtyping compare with similar terms like polymorphism and inheritance?","answer":"

              Subtyping is a relationship between types, where one type is a specialized version of another. It enables polymorphism, which allows different subtypes to be treated as instances of their common supertype. Inheritance, on the other hand, is a mechanism for code reuse through class hierarchies, used to establish subtyping relationships. Subtyping also includes a concept known as behavioral subtyping, where types are related based on their shared behavior, not just their class hierarchy.<\/p>"},{"question":"What are the perspectives and future technologies related to subtyping?","answer":"

              Subtyping is expected to remain a fundamental concept in software engineering. As programming languages evolve, developers may have more powerful tools to express and enforce subtyping relationships. Advancements in behavioral subtyping could lead to more flexible and robust systems, where objects with different hierarchies can still be used interchangeably based on their behavior.<\/p>"},{"question":"How are proxy servers associated with subtyping?","answer":"

              Proxy server networks can benefit from subtyping by organizing different proxy types into a subtype hierarchy. This approach allows providers like OneProxy to share common functionality in a generic \"Proxy\" type while enabling specialized behaviors in subtypes. This enhances proxy management, code modularity, and maintainability.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/479194","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/479194\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media\/479195"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media?parent=479194"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}