{"id":470924,"date":"2024-06-23T16:01:59","date_gmt":"2024-06-23T16:01:59","guid":{"rendered":"https:\/\/proxycompass.com\/?p=470924"},"modified":"2024-07-04T11:54:28","modified_gmt":"2024-07-04T11:54:28","slug":"web-scraping-best-practices-good-etiquette-and-some-tricks","status":"publish","type":"post","link":"https:\/\/proxycompass.com\/vi\/web-scraping-best-practices-good-etiquette-and-some-tricks\/","title":{"rendered":"C\u00e1c ph\u01b0\u01a1ng ph\u00e1p hay nh\u1ea5t v\u1ec1 qu\u00e9t web: Nghi th\u1ee9c t\u1ed1t v\u00e0 m\u1ed9t s\u1ed1 th\u1ee7 thu\u1eadt"},"content":{"rendered":"<p>Trong b\u00e0i \u0111\u0103ng n\u00e0y, ch\u00fang ta s\u1ebd th\u1ea3o lu\u1eadn v\u1ec1 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p hay nh\u1ea5t v\u1ec1 qu\u00e9t web v\u00e0 v\u00ec t\u00f4i tin r\u1eb1ng nhi\u1ec1u ng\u01b0\u1eddi trong s\u1ed1 c\u00e1c b\u1ea1n \u0111ang ngh\u0129 v\u1ec1 n\u00f3 n\u00ean t\u00f4i s\u1ebd \u0111\u1ec1 c\u1eadp \u0111\u1ebfn v\u1ea5n \u0111\u1ec1 nan gi\u1ea3i ngay l\u1eadp t\u1ee9c. N\u00f3 c\u00f3 h\u1ee3p ph\u00e1p kh\u00f4ng? R\u1ea5t c\u00f3 th\u1ec3 l\u00e0 c\u00f3.<\/p>\n\n\n\n<p>Vi\u1ec7c thu th\u1eadp c\u00e1c trang web n\u00f3i chung l\u00e0 h\u1ee3p ph\u00e1p nh\u01b0ng trong m\u1ed9t s\u1ed1 c\u01a1 s\u1edf h\u1ee3p l\u00fd nh\u1ea5t \u0111\u1ecbnh (b\u1ea1n c\u1ee9 \u0111\u1ecdc ti\u1ebfp).<br><\/p>\n\n\n\n<p>C\u0169ng ph\u1ee5 thu\u1ed9c v\u00e0o v\u1ecb tr\u00ed \u0111\u1ecba l\u00fd c\u1ee7a b\u1ea1n v\u00e0 v\u00ec t\u00f4i kh\u00f4ng ph\u1ea3i l\u00e0 th\u1ea7n \u0111\u00e8n n\u00ean t\u00f4i kh\u00f4ng bi\u1ebft b\u1ea1n \u0111ang \u1edf \u0111\u00e2u n\u00ean t\u00f4i kh\u00f4ng th\u1ec3 n\u00f3i ch\u1eafc ch\u1eafn. H\u00e3y ki\u1ec3m tra lu\u1eadt ph\u00e1p \u0111\u1ecba ph\u01b0\u01a1ng c\u1ee7a b\u1ea1n v\u00e0 \u0111\u1eebng ph\u00e0n n\u00e0n n\u1ebfu ch\u00fang t\u00f4i \u0111\u01b0a ra m\u1ed9t s\u1ed1 \u201cl\u1eddi khuy\u00ean t\u1ed3i\u201d, haha.&nbsp;<\/p>\n\n\n\n<p>N\u00f3i \u0111\u00f9a th\u00ec \u1edf h\u1ea7u h\u1ebft m\u1ecdi n\u01a1i \u0111\u1ec1u \u1ed5n; ch\u1ec9 c\u1ea7n \u0111\u1eebng coi th\u01b0\u1eddng n\u00f3 v\u00e0 tr\u00e1nh xa c\u00e1c t\u00e0i li\u1ec7u c\u00f3 b\u1ea3n quy\u1ec1n, d\u1eef li\u1ec7u c\u00e1 nh\u00e2n v\u00e0 nh\u1eefng th\u1ee9 \u0111\u1eb1ng sau m\u00e0n h\u00ecnh \u0111\u0103ng nh\u1eadp.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Ch\u00fang t\u00f4i khuy\u00ean b\u1ea1n n\u00ean l\u00e0m theo c\u00e1c ph\u01b0\u01a1ng ph\u00e1p hay nh\u1ea5t v\u1ec1 qu\u00e9t web sau:&nbsp;<\/h2>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. T\u00f4n tr\u1ecdng robots.txt<\/h3>\n\n\n\n<p>B\u1ea1n c\u00f3 mu\u1ed1n bi\u1ebft b\u00ed quy\u1ebft \u0111\u1ec3 qu\u00e9t c\u00e1c trang web m\u1ed9t c\u00e1ch y\u00ean b\u00ecnh kh\u00f4ng? Ch\u1ec9 c\u1ea7n t\u00f4n tr\u1ecdng t\u1ec7p robots.txt c\u1ee7a trang web. T\u1ec7p n\u00e0y, n\u1eb1m \u1edf th\u01b0 m\u1ee5c g\u1ed1c c\u1ee7a trang web, ch\u1ec9 \u0111\u1ecbnh trang n\u00e0o \u0111\u01b0\u1ee3c ph\u00e9p qu\u00e9t b\u1edfi bot v\u00e0 trang n\u00e0o b\u1ecb gi\u1edbi h\u1ea1n. Vi\u1ec7c theo d\u00f5i robots.txt c\u0169ng r\u1ea5t quan tr\u1ecdng v\u00ec n\u00f3 c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn vi\u1ec7c ch\u1eb7n IP c\u1ee7a b\u1ea1n ho\u1eb7c d\u1eabn \u0111\u1ebfn h\u1eadu qu\u1ea3 ph\u00e1p l\u00fd t\u00f9y thu\u1ed9c v\u00e0o v\u1ecb tr\u00ed c\u1ee7a b\u1ea1n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2. \u0110\u1eb7t t\u1ed1c \u0111\u1ed9 thu th\u1eadp d\u1eef li\u1ec7u h\u1ee3p l\u00fd<\/h3>\n\n\n\n<p>\u0110\u1ec3 tr\u00e1nh t\u00ecnh tr\u1ea1ng qu\u00e1 t\u1ea3i, \u0111\u00f3ng b\u0103ng ho\u1eb7c s\u1eadp m\u00e1y ch\u1ee7 trang web, h\u00e3y ki\u1ec3m so\u00e1t t\u1ed1c \u0111\u1ed9 y\u00eau c\u1ea7u c\u1ee7a b\u1ea1n v\u00e0 k\u1ebft h\u1ee3p c\u00e1c kho\u1ea3ng th\u1eddi gian. N\u00f3i m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n h\u01a1n nhi\u1ec1u, h\u00e3y th\u1ef1c hi\u1ec7n d\u1ec5 d\u00e0ng v\u1edbi t\u1ed1c \u0111\u1ed9 thu th\u1eadp d\u1eef li\u1ec7u. \u0110\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c \u0111i\u1ec1u n\u00e0y, b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng Scrapy ho\u1eb7c Selenium v\u00e0 th\u00eam \u0111\u1ed9 tr\u1ec5 v\u00e0o c\u00e1c y\u00eau c\u1ea7u.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3. Xoay v\u00f2ng t\u00e1c nh\u00e2n ng\u01b0\u1eddi d\u00f9ng v\u00e0 \u0111\u1ecba ch\u1ec9 IP<\/h3>\n\n\n\n<p>C\u00e1c trang web c\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh v\u00e0 ch\u1eb7n c\u00e1c bot qu\u00e9t b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng chu\u1ed7i t\u00e1c nh\u00e2n ng\u01b0\u1eddi d\u00f9ng ho\u1eb7c \u0111\u1ecba ch\u1ec9 IP. Th\u1ec9nh tho\u1ea3ng thay \u0111\u1ed5i t\u00e1c nh\u00e2n ng\u01b0\u1eddi d\u00f9ng v\u00e0 \u0111\u1ecba ch\u1ec9 IP v\u00e0 s\u1eed d\u1ee5ng m\u1ed9t b\u1ed9 tr\u00ecnh duy\u1ec7t th\u1ef1c. S\u1eed d\u1ee5ng chu\u1ed7i t\u00e1c nh\u00e2n ng\u01b0\u1eddi d\u00f9ng v\u00e0 \u0111\u1ec1 c\u1eadp \u0111\u1ebfn ch\u00ednh b\u1ea1n trong \u0111\u00f3 \u1edf m\u1ed9t m\u1ee9c \u0111\u1ed9 n\u00e0o \u0111\u00f3. M\u1ee5c ti\u00eau c\u1ee7a b\u1ea1n l\u00e0 tr\u1edf n\u00ean kh\u00f4ng th\u1ec3 b\u1ecb ph\u00e1t hi\u1ec7n, v\u00ec v\u1eady h\u00e3y \u0111\u1ea3m b\u1ea3o th\u1ef1c hi\u1ec7n \u0111\u00fang.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4. Tr\u00e1nh truy c\u1eadp ph\u00eda sau c\u00e1c trang \u0111\u0103ng nh\u1eadp<\/h3>\n\n\n\n<p>H\u00e3y ch\u1ec9 n\u00f3i r\u1eb1ng vi\u1ec7c lo\u1ea1i b\u1ecf n\u1ed9i dung \u0111\u1eb1ng sau th\u00f4ng tin \u0111\u0103ng nh\u1eadp n\u00f3i chung l\u00e0 sai. Ph\u1ea3i? \u0110\u01b0\u1ee3c r\u1ed3i? T\u00f4i bi\u1ebft nhi\u1ec1u ng\u01b0\u1eddi trong s\u1ed1 c\u00e1c b\u1ea1n s\u1ebd b\u1ecf qua ph\u1ea7n \u0111\u00f3, nh\u01b0ng d\u00f9 sao \u0111i n\u1eefa\u2026 H\u00e3y c\u1ed1 g\u1eafng h\u1ea1n ch\u1ebf vi\u1ec7c thu th\u1eadp d\u1eef li\u1ec7u c\u00f4ng khai v\u00e0 n\u1ebfu b\u1ea1n c\u1ea7n thu th\u1eadp sau th\u00f4ng tin \u0111\u0103ng nh\u1eadp, c\u00f3 th\u1ec3 h\u00e3y xin ph\u00e9p. T\u00f4i kh\u00f4ng bi\u1ebft, h\u00e3y \u0111\u1ec3 l\u1ea1i nh\u1eadn x\u00e9t v\u1ec1 c\u00e1ch b\u1ea1n s\u1ebd th\u1ef1c hi\u1ec7n vi\u1ec7c n\u00e0y. B\u1ea1n c\u00f3 c\u1ea1o nh\u1eefng th\u1ee9 \u0111\u1eb1ng sau m\u1ed9t l\u1ea7n \u0111\u0103ng nh\u1eadp kh\u00f4ng?<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5. Ph\u00e2n t\u00edch v\u00e0 l\u00e0m s\u1ea1ch d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c tr\u00edch xu\u1ea5t<\/h3>\n\n\n\n<p>D\u1eef li\u1ec7u \u0111\u01b0\u1ee3c thu th\u1eadp th\u01b0\u1eddng ch\u01b0a \u0111\u01b0\u1ee3c x\u1eed l\u00fd v\u00e0 c\u00f3 th\u1ec3 ch\u1ee9a th\u00f4ng tin kh\u00f4ng li\u00ean quan ho\u1eb7c th\u1eadm ch\u00ed kh\u00f4ng c\u00f3 c\u1ea5u tr\u00fac. Tr\u01b0\u1edbc khi ph\u00e2n t\u00edch, c\u1ea7n ph\u1ea3i x\u1eed l\u00fd tr\u01b0\u1edbc d\u1eef li\u1ec7u v\u00e0 l\u00e0m s\u1ea1ch d\u1eef li\u1ec7u b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng b\u1ed9 ch\u1ecdn bi\u1ec3u th\u1ee9c ch\u00ednh quy, XPath ho\u1eb7c CSS. Th\u1ef1c hi\u1ec7n b\u1eb1ng c\u00e1ch lo\u1ea1i b\u1ecf s\u1ef1 d\u01b0 th\u1eeba, s\u1eeda l\u1ed7i v\u00e0 x\u1eed l\u00fd d\u1eef li\u1ec7u b\u1ecb thi\u1ebfu. H\u00e3y d\u00e0nh th\u1eddi gian \u0111\u1ec3 l\u00e0m s\u1ea1ch n\u00f3 v\u00ec b\u1ea1n c\u1ea7n ch\u1ea5t l\u01b0\u1ee3ng \u0111\u1ec3 tr\u00e1nh \u0111au \u0111\u1ea7u.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">6. X\u1eed l\u00fd n\u1ed9i dung \u0111\u1ed9ng<\/h3>\n\n\n\n<p>H\u1ea7u h\u1ebft c\u00e1c trang web s\u1eed d\u1ee5ng JavaScript \u0111\u1ec3 t\u1ea1o n\u1ed9i dung c\u1ee7a trang v\u00e0 \u0111\u00e2y l\u00e0 v\u1ea5n \u0111\u1ec1 \u0111\u1ed1i v\u1edbi c\u00e1c k\u1ef9 thu\u1eadt thu th\u1eadp th\u00f4ng tin truy\u1ec1n th\u1ed1ng. \u0110\u1ec3 l\u1ea5y v\u00e0 lo\u1ea1i b\u1ecf d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c t\u1ea3i \u0111\u1ed9ng, ng\u01b0\u1eddi ta c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c tr\u00ecnh duy\u1ec7t kh\u00f4ng c\u00f3 giao di\u1ec7n ng\u01b0\u1eddi d\u00f9ng nh\u01b0 Puppeteer ho\u1eb7c c\u00e1c c\u00f4ng c\u1ee5 nh\u01b0 Selenium. Ch\u1ec9 t\u1eadp trung v\u00e0o c\u00e1c kh\u00eda c\u1ea1nh \u0111\u01b0\u1ee3c quan t\u00e2m \u0111\u1ec3 n\u00e2ng cao hi\u1ec7u qu\u1ea3.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">7. Th\u1ef1c hi\u1ec7n x\u1eed l\u00fd l\u1ed7i m\u1ea1nh m\u1ebd<\/h3>\n\n\n\n<p>C\u1ea7n ph\u1ea3i s\u1eeda l\u1ed7i \u0111\u1ec3 tr\u00e1nh l\u1ed7i ch\u01b0\u01a1ng tr\u00ecnh do s\u1ef1 c\u1ed1 m\u1ea1ng, gi\u1edbi h\u1ea1n t\u1ed1c \u0111\u1ed9 ho\u1eb7c thay \u0111\u1ed5i c\u1ea5u tr\u00fac trang web. H\u00e3y th\u1eed l\u1ea1i c\u00e1c y\u00eau c\u1ea7u kh\u00f4ng th\u00e0nh c\u00f4ng, tu\u00e2n theo gi\u1edbi h\u1ea1n t\u1ed1c \u0111\u1ed9 v\u00e0 n\u1ebfu c\u1ea5u tr\u00fac c\u1ee7a HTML \u0111\u00e3 thay \u0111\u1ed5i th\u00ec h\u00e3y thay \u0111\u1ed5i c\u00e1ch ph\u00e2n t\u00edch c\u00fa ph\u00e1p. Ghi l\u1ea1i nh\u1eefng l\u1ed7i sai v\u00e0 th\u1ef1c hi\u1ec7n theo c\u00e1c ho\u1ea1t \u0111\u1ed9ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh v\u1ea5n \u0111\u1ec1 v\u00e0 c\u00e1ch b\u1ea1n c\u00f3 th\u1ec3 gi\u1ea3i quy\u1ebft ch\u00fang.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">8. T\u00f4n tr\u1ecdng \u0111i\u1ec1u kho\u1ea3n d\u1ecbch v\u1ee5 c\u1ee7a trang web<\/h3>\n\n\n\n<p>Tr\u01b0\u1edbc khi qu\u00e9t m\u1ed9t trang web, b\u1ea1n n\u00ean xem qua c\u00e1c \u0111i\u1ec1u kho\u1ea3n d\u1ecbch v\u1ee5 c\u1ee7a trang web. M\u1ed9t s\u1ed1 trong s\u1ed1 h\u1ecd kh\u00f4ng cho ph\u00e9p c\u1ea1o ho\u1eb7c c\u00f3 m\u1ed9t s\u1ed1 quy t\u1eafc v\u00e0 quy \u0111\u1ecbnh ph\u1ea3i tu\u00e2n theo. N\u1ebfu c\u00e1c \u0111i\u1ec1u kho\u1ea3n kh\u00f4ng r\u00f5 r\u00e0ng, ng\u01b0\u1eddi ta n\u00ean li\u00ean h\u1ec7 v\u1edbi ch\u1ee7 s\u1edf h\u1eefu trang web \u0111\u1ec3 bi\u1ebft th\u00eam th\u00f4ng tin.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">9. Xem x\u00e9t \u00fd ngh\u0129a ph\u00e1p l\u00fd<\/h3>\n\n\n\n<p>\u0110\u1ea3m b\u1ea3o r\u1eb1ng b\u1ea1n \u0111\u01b0\u1ee3c ph\u00e9p thu th\u1eadp v\u00e0 s\u1eed d\u1ee5ng d\u1eef li\u1ec7u m\u1ed9t c\u00e1ch h\u1ee3p ph\u00e1p, bao g\u1ed3m c\u1ea3 c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 b\u1ea3n quy\u1ec1n v\u00e0 quy\u1ec1n ri\u00eang t\u01b0. Nghi\u00eam c\u1ea5m c\u1ea1o b\u1ea5t k\u1ef3 t\u00e0i li\u1ec7u c\u00f3 b\u1ea3n quy\u1ec1n ho\u1eb7c b\u1ea5t k\u1ef3 th\u00f4ng tin c\u00e1 nh\u00e2n n\u00e0o c\u1ee7a ng\u01b0\u1eddi kh\u00e1c. N\u1ebfu doanh nghi\u1ec7p c\u1ee7a b\u1ea1n b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi lu\u1eadt b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u nh\u01b0 GDPR, h\u00e3y \u0111\u1ea3m b\u1ea3o r\u1eb1ng b\u1ea1n tu\u00e2n th\u1ee7 ch\u00fang.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">10. Kh\u00e1m ph\u00e1 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p thu th\u1eadp d\u1eef li\u1ec7u thay th\u1ebf<\/h3>\n\n\n\n<p>B\u1ea1n n\u00ean t\u00ecm ki\u1ebfm c\u00e1c ngu\u1ed3n d\u1eef li\u1ec7u kh\u00e1c tr\u01b0\u1edbc khi lo\u1ea1i b\u1ecf n\u00f3. C\u00f3 nhi\u1ec1u trang web cung c\u1ea5p API ho\u1eb7c b\u1ed9 d\u1eef li\u1ec7u c\u00f3 th\u1ec3 t\u1ea3i xu\u1ed1ng v\u00e0 \u0111i\u1ec1u n\u00e0y thu\u1eadn ti\u1ec7n v\u00e0 hi\u1ec7u qu\u1ea3 h\u01a1n nhi\u1ec1u so v\u1edbi vi\u1ec7c thu th\u1eadp d\u1eef li\u1ec7u. V\u00ec v\u1eady, h\u00e3y ki\u1ec3m tra xem c\u00f3 l\u1ed1i t\u1eaft n\u00e0o tr\u01b0\u1edbc khi \u0111i con \u0111\u01b0\u1eddng d\u00e0i kh\u00f4ng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">11. Th\u1ef1c hi\u1ec7n gi\u00e1m s\u00e1t v\u00e0 \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng d\u1eef li\u1ec7u<\/h3>\n\n\n\n<p>X\u00e1c \u0111\u1ecbnh c\u00e1c c\u00e1ch m\u00e0 b\u1ea1n c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n ch\u1ea5t l\u01b0\u1ee3ng c\u1ee7a d\u1eef li\u1ec7u \u0111\u00e3 \u0111\u01b0\u1ee3c thu th\u1eadp. Ki\u1ec3m tra m\u00e1y c\u1ea1o v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng d\u1eef li\u1ec7u h\u00e0ng ng\u00e0y \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh b\u1ea5t k\u1ef3 s\u1ef1 b\u1ea5t th\u01b0\u1eddng n\u00e0o. Th\u1ef1c hi\u1ec7n gi\u00e1m s\u00e1t v\u00e0 ki\u1ec3m tra ch\u1ea5t l\u01b0\u1ee3ng t\u1ef1 \u0111\u1ed9ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh v\u00e0 tr\u00e1nh c\u00e1c v\u1ea5n \u0111\u1ec1.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">12. \u00c1p d\u1ee5ng ch\u00ednh s\u00e1ch thu th\u1eadp d\u1eef li\u1ec7u ch\u00ednh th\u1ee9c<\/h3>\n\n\n\n<p>\u0110\u1ec3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng b\u1ea1n \u0111ang l\u00e0m \u0111\u00fang v\u00e0 h\u1ee3p ph\u00e1p, h\u00e3y thi\u1ebft l\u1eadp ch\u00ednh s\u00e1ch thu th\u1eadp d\u1eef li\u1ec7u. Bao g\u1ed3m trong \u0111\u00f3 c\u00e1c quy t\u1eafc, khuy\u1ebfn ngh\u1ecb v\u00e0 c\u00e1c kh\u00eda c\u1ea1nh ph\u00e1p l\u00fd m\u00e0 nh\u00f3m c\u1ee7a b\u1ea1n n\u00ean bi\u1ebft. N\u00f3 lo\u1ea1i tr\u1eeb nguy c\u01a1 l\u1ea1m d\u1ee5ng d\u1eef li\u1ec7u v\u00e0 \u0111\u1ea3m b\u1ea3o r\u1eb1ng m\u1ecdi ng\u01b0\u1eddi \u0111\u1ec1u bi\u1ebft c\u00e1c quy t\u1eafc.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">13. Lu\u00f4n c\u1eadp nh\u1eadt th\u00f4ng tin v\u00e0 th\u00edch \u1ee9ng v\u1edbi nh\u1eefng thay \u0111\u1ed5i<\/h3>\n\n\n\n<p>Qu\u00e9t web l\u00e0 m\u1ed9t l\u0129nh v\u1ef1c ho\u1ea1t \u0111\u1ed9ng \u0111\u01b0\u1ee3c \u0111\u1eb7c tr\u01b0ng b\u1edfi s\u1ef1 xu\u1ea5t hi\u1ec7n c\u1ee7a c\u00e1c c\u00f4ng ngh\u1ec7 m\u1edbi, c\u00e1c v\u1ea5n \u0111\u1ec1 ph\u00e1p l\u00fd v\u00e0 c\u00e1c trang web \u0111ang \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt li\u00ean t\u1ee5c. H\u00e3y \u0111\u1ea3m b\u1ea3o r\u1eb1ng b\u1ea1n \u00e1p d\u1ee5ng v\u0103n h\u00f3a h\u1ecdc t\u1eadp v\u00e0 t\u00ednh linh ho\u1ea1t \u0111\u1ec3 \u0111i \u0111\u00fang h\u01b0\u1edbng.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">G\u00f3i n\u00f3 l\u1ea1i!<\/h2>\n\n\n\n<p>N\u1ebfu b\u1ea1n \u0111\u1ecbnh ch\u01a1i v\u1edbi m\u1ed9t s\u1ed1 \u0111\u1ed3 ch\u01a1i \u0111\u1eb9p m\u1eaft m\u00e0 ch\u00fang t\u00f4i t\u00f9y \u00fd s\u1eed d\u1ee5ng (h\u00e3y t\u1ef1 gi\u00fap m\u00ecnh v\u00e0 tra c\u1ee9u m\u1ed9t s\u1ed1 th\u01b0 vi\u1ec7n Python), th\u00ec\u2026 \u00e0, h\u00e3y c\u01b0 x\u1eed l\u1ecbch s\u1ef1 v\u00e0 c\u0169ng h\u00e3y th\u00f4ng minh v\u1ec1 \u0111i\u1ec1u \u0111\u00f3 n\u1ebfu b\u1ea1n ch\u1ecdn b\u1ecf qua l\u1eddi khuy\u00ean \u0111\u1ea7u ti\u00ean.&nbsp;<\/p>\n\n\n\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 ph\u01b0\u01a1ng ph\u00e1p hay nh\u1ea5t m\u00e0 ch\u00fang t\u00f4i \u0111\u00e3 th\u1ea3o lu\u1eadn:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>T\u00f4n tr\u1ecdng robots.txt<\/li>\n\n\n\n<li>Ki\u1ec3m so\u00e1t t\u1ed1c \u0111\u1ed9 thu th\u1eadp th\u00f4ng tin<\/li>\n\n\n\n<li>Xoay danh t\u00ednh c\u1ee7a b\u1ea1n<\/li>\n\n\n\n<li>Tr\u00e1nh khu v\u1ef1c ri\u00eang t\u01b0<\/li>\n\n\n\n<li>L\u00e0m s\u1ea1ch v\u00e0 ph\u00e2n t\u00edch d\u1eef li\u1ec7u<\/li>\n\n\n\n<li>X\u1eed l\u00fd l\u1ed7i hi\u1ec7u qu\u1ea3<\/li>\n\n\n\n<li>H\u00e3y ngoan, tu\u00e2n th\u1ee7 c\u00e1c quy t\u1eafc<\/li>\n<\/ul>\n\n\n\n<p>Khi d\u1eef li\u1ec7u ng\u00e0y c\u00e0ng tr\u1edf n\u00ean c\u00f3 gi\u00e1 tr\u1ecb, nh\u1eefng ng\u01b0\u1eddi qu\u00e9t web s\u1ebd ph\u1ea3i \u0111\u1ed1i m\u1eb7t v\u1edbi s\u1ef1 l\u1ef1a ch\u1ecdn:&nbsp;<\/p>\n\n\n\n<p>T\u00f4n tr\u1ecdng t\u1ec7p robots.txt, \u0111\u01b0\u1ee3c hay kh\u00f4ng? T\u00f9y b\u1ea1n \u0111\u1ea5y.<\/p>\n\n\n\n<p>H\u00e3y b\u00ecnh lu\u1eadn b\u00ean d\u01b0\u1edbi, b\u1ea1n c\u00f3 quan \u0111i\u1ec3m g\u00ec v\u1ec1 \u0111i\u1ec1u \u0111\u00f3?<\/p>","protected":false},"excerpt":{"rendered":"<p>In this post, we&#8217;ll discuss the web scraping best practices, and since I believe many of you are thinking about it, I&#8217;ll address the elephant in the room right away. Is it legal? Most likely yes. Scraping sites is generally legal, but within certain reasonable grounds (just keep reading). Also depends on your geographical location, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":470932,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[35],"tags":[],"class_list":["post-470924","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-articles"],"acf":[],"_links":{"self":[{"href":"https:\/\/proxycompass.com\/vi\/wp-json\/wp\/v2\/posts\/470924","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/proxycompass.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/proxycompass.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/proxycompass.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/proxycompass.com\/vi\/wp-json\/wp\/v2\/comments?post=470924"}],"version-history":[{"count":5,"href":"https:\/\/proxycompass.com\/vi\/wp-json\/wp\/v2\/posts\/470924\/revisions"}],"predecessor-version":[{"id":470935,"href":"https:\/\/proxycompass.com\/vi\/wp-json\/wp\/v2\/posts\/470924\/revisions\/470935"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/proxycompass.com\/vi\/wp-json\/wp\/v2\/media\/470932"}],"wp:attachment":[{"href":"https:\/\/proxycompass.com\/vi\/wp-json\/wp\/v2\/media?parent=470924"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/proxycompass.com\/vi\/wp-json\/wp\/v2\/categories?post=470924"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/proxycompass.com\/vi\/wp-json\/wp\/v2\/tags?post=470924"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}