{"id":476702,"date":"2023-08-09T07:35:16","date_gmt":"2023-08-09T07:35:16","guid":{"rendered":""},"modified":"2023-09-05T11:13:17","modified_gmt":"2023-09-05T11:13:17","slug":"data-scraping","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/data-scraping\/","title":{"rendered":"Qu\u00e9t d\u1eef li\u1ec7u"},"content":{"rendered":"<p>Qu\u00e9t d\u1eef li\u1ec7u, c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 qu\u00e9t web ho\u1eb7c thu th\u1eadp d\u1eef li\u1ec7u, l\u00e0 m\u1ed9t qu\u00e1 tr\u00ecnh tr\u00edch xu\u1ea5t th\u00f4ng tin t\u1eeb c\u00e1c trang web v\u00e0 trang web \u0111\u1ec3 thu th\u1eadp d\u1eef li\u1ec7u c\u00f3 gi\u00e1 tr\u1ecb cho nhi\u1ec1u m\u1ee5c \u0111\u00edch kh\u00e1c nhau. N\u00f3 li\u00ean quan \u0111\u1ebfn vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c c\u00f4ng c\u1ee5 v\u00e0 t\u1eadp l\u1ec7nh t\u1ef1 \u0111\u1ed9ng \u0111\u1ec3 \u0111i\u1ec1u h\u01b0\u1edbng c\u00e1c trang web v\u00e0 truy xu\u1ea5t d\u1eef li\u1ec7u c\u1ee5 th\u1ec3, ch\u1eb3ng h\u1ea1n nh\u01b0 v\u0103n b\u1ea3n, h\u00ecnh \u1ea3nh, li\u00ean k\u1ebft, v.v., \u1edf \u0111\u1ecbnh d\u1ea1ng c\u00f3 c\u1ea5u tr\u00fac. Qu\u00e9t d\u1eef li\u1ec7u \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t k\u1ef9 thu\u1eadt thi\u1ebft y\u1ebfu \u0111\u1ec3 c\u00e1c doanh nghi\u1ec7p, nh\u00e0 nghi\u00ean c\u1ee9u, nh\u00e0 ph\u00e2n t\u00edch v\u00e0 nh\u00e0 ph\u00e1t tri\u1ec3n thu th\u1eadp th\u00f4ng tin chi ti\u1ebft, theo d\u00f5i \u0111\u1ed1i th\u1ee7 c\u1ea1nh tranh v\u00e0 th\u00fac \u0111\u1ea9y \u0111\u1ed5i m\u1edbi.<\/p>\n<h2>L\u1ecbch s\u1eed v\u1ec1 ngu\u1ed3n g\u1ed1c c\u1ee7a vi\u1ec7c Qu\u00e9t d\u1eef li\u1ec7u v\u00e0 l\u1ea7n \u0111\u1ea7u ti\u00ean \u0111\u1ec1 c\u1eadp \u0111\u1ebfn n\u00f3.<\/h2>\n<p>Ngu\u1ed3n g\u1ed1c c\u1ee7a vi\u1ec7c thu th\u1eadp d\u1eef li\u1ec7u c\u00f3 th\u1ec3 b\u1eaft ngu\u1ed3n t\u1eeb nh\u1eefng ng\u00e0y \u0111\u1ea7u c\u1ee7a Internet khi n\u1ed9i dung web b\u1eaft \u0111\u1ea7u \u0111\u01b0\u1ee3c cung c\u1ea5p c\u00f4ng khai. V\u00e0o gi\u1eefa nh\u1eefng n\u0103m 1990, c\u00e1c doanh nghi\u1ec7p v\u00e0 nh\u00e0 nghi\u00ean c\u1ee9u \u0111\u00e3 t\u00ecm ki\u1ebfm c\u00e1c ph\u01b0\u01a1ng ph\u00e1p hi\u1ec7u qu\u1ea3 \u0111\u1ec3 thu th\u1eadp d\u1eef li\u1ec7u t\u1eeb c\u00e1c trang web. Vi\u1ec7c \u0111\u1ec1 c\u1eadp \u0111\u1ea7u ti\u00ean \u0111\u1ebfn vi\u1ec7c qu\u00e9t d\u1eef li\u1ec7u c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y trong c\u00e1c b\u00e0i b\u00e1o h\u1ecdc thu\u1eadt th\u1ea3o lu\u1eadn v\u1ec1 c\u00e1c k\u1ef9 thu\u1eadt t\u1ef1 \u0111\u1ed9ng tr\u00edch xu\u1ea5t d\u1eef li\u1ec7u t\u1eeb t\u00e0i li\u1ec7u HTML.<\/p>\n<h2>Th\u00f4ng tin chi ti\u1ebft v\u1ec1 Qu\u00e9t d\u1eef li\u1ec7u. M\u1edf r\u1ed9ng ch\u1ee7 \u0111\u1ec1 Qu\u00e9t d\u1eef li\u1ec7u.<\/h2>\n<p>Qu\u00e9t d\u1eef li\u1ec7u bao g\u1ed3m m\u1ed9t lo\u1ea1t c\u00e1c b\u01b0\u1edbc \u0111\u1ec3 truy xu\u1ea5t v\u00e0 s\u1eafp x\u1ebfp d\u1eef li\u1ec7u t\u1eeb c\u00e1c trang web. Qu\u00e1 tr\u00ecnh n\u00e0y th\u01b0\u1eddng b\u1eaft \u0111\u1ea7u b\u1eb1ng vi\u1ec7c x\u00e1c \u0111\u1ecbnh trang web m\u1ee5c ti\u00eau v\u00e0 d\u1eef li\u1ec7u c\u1ee5 th\u1ec3 s\u1ebd \u0111\u01b0\u1ee3c lo\u1ea1i b\u1ecf. Sau \u0111\u00f3, c\u00e1c c\u00f4ng c\u1ee5 ho\u1eb7c t\u1eadp l\u1ec7nh qu\u00e9t web \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n \u0111\u1ec3 t\u01b0\u01a1ng t\u00e1c v\u1edbi c\u1ea5u tr\u00fac HTML c\u1ee7a trang web, \u0111i\u1ec1u h\u01b0\u1edbng qua c\u00e1c trang v\u00e0 tr\u00edch xu\u1ea5t d\u1eef li\u1ec7u c\u1ea7n thi\u1ebft. D\u1eef li\u1ec7u \u0111\u01b0\u1ee3c tr\u00edch xu\u1ea5t th\u01b0\u1eddng \u0111\u01b0\u1ee3c l\u01b0u \u1edf \u0111\u1ecbnh d\u1ea1ng c\u00f3 c\u1ea5u tr\u00fac, ch\u1eb3ng h\u1ea1n nh\u01b0 CSV, JSON ho\u1eb7c c\u01a1 s\u1edf d\u1eef li\u1ec7u \u0111\u1ec3 ph\u00e2n t\u00edch v\u00e0 s\u1eed d\u1ee5ng th\u00eam.<\/p>\n<p>Vi\u1ec7c qu\u00e9t web c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1eb1ng nhi\u1ec1u ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh kh\u00e1c nhau nh\u01b0 Python, JavaScript v\u00e0 c\u00e1c th\u01b0 vi\u1ec7n nh\u01b0 BeautifulSoup, Scrapy v\u00e0 Selenium. Tuy nhi\u00ean, \u0111i\u1ec1u quan tr\u1ecdng l\u00e0 ph\u1ea3i l\u01b0u \u00fd \u0111\u1ebfn c\u00e1c c\u00e2n nh\u1eafc v\u1ec1 m\u1eb7t ph\u00e1p l\u00fd v\u00e0 \u0111\u1ea1o \u0111\u1ee9c khi thu th\u1eadp d\u1eef li\u1ec7u t\u1eeb c\u00e1c trang web, v\u00ec m\u1ed9t s\u1ed1 trang web c\u00f3 th\u1ec3 c\u1ea5m ho\u1eb7c h\u1ea1n ch\u1ebf c\u00e1c ho\u1ea1t \u0111\u1ed9ng \u0111\u00f3 th\u00f4ng qua c\u00e1c \u0111i\u1ec1u kho\u1ea3n d\u1ecbch v\u1ee5 ho\u1eb7c t\u1ec7p robots.txt c\u1ee7a h\u1ecd.<\/p>\n<h2>C\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a Data Scraping. C\u00e1ch qu\u00e9t d\u1eef li\u1ec7u ho\u1ea1t \u0111\u1ed9ng.<\/h2>\n<p>C\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a vi\u1ec7c qu\u00e9t d\u1eef li\u1ec7u bao g\u1ed3m hai th\u00e0nh ph\u1ea7n ch\u00ednh: tr\u00ecnh thu th\u1eadp d\u1eef li\u1ec7u web v\u00e0 tr\u00ecnh tr\u00edch xu\u1ea5t d\u1eef li\u1ec7u. Tr\u00ecnh thu th\u1eadp d\u1eef li\u1ec7u web ch\u1ecbu tr\u00e1ch nhi\u1ec7m \u0111i\u1ec1u h\u01b0\u1edbng qua c\u00e1c trang web, theo c\u00e1c li\u00ean k\u1ebft v\u00e0 x\u00e1c \u0111\u1ecbnh d\u1eef li\u1ec7u c\u00f3 li\u00ean quan. N\u00f3 b\u1eaft \u0111\u1ea7u b\u1eb1ng c\u00e1ch g\u1eedi y\u00eau c\u1ea7u HTTP \u0111\u1ebfn trang web m\u1ee5c ti\u00eau v\u00e0 nh\u1eadn ph\u1ea3n h\u1ed3i c\u00f3 ch\u1ee9a n\u1ed9i dung HTML.<\/p>\n<p>Sau khi c\u00f3 \u0111\u01b0\u1ee3c n\u1ed9i dung HTML, tr\u00ecnh tr\u00edch xu\u1ea5t d\u1eef li\u1ec7u s\u1ebd ho\u1ea1t \u0111\u1ed9ng. N\u00f3 ph\u00e2n t\u00edch m\u00e3 HTML, \u0111\u1ecbnh v\u1ecb d\u1eef li\u1ec7u mong mu\u1ed1n b\u1eb1ng nhi\u1ec1u k\u1ef9 thu\u1eadt kh\u00e1c nhau nh\u01b0 b\u1ed9 ch\u1ecdn CSS ho\u1eb7c XPath, sau \u0111\u00f3 tr\u00edch xu\u1ea5t v\u00e0 l\u01b0u tr\u1eef th\u00f4ng tin. Qu\u00e1 tr\u00ecnh tr\u00edch xu\u1ea5t d\u1eef li\u1ec7u c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c tinh ch\u1ec9nh \u0111\u1ec3 truy xu\u1ea5t c\u00e1c y\u1ebfu t\u1ed1 c\u1ee5 th\u1ec3, ch\u1eb3ng h\u1ea1n nh\u01b0 gi\u00e1 s\u1ea3n ph\u1ea9m, \u0111\u00e1nh gi\u00e1 ho\u1eb7c th\u00f4ng tin li\u00ean h\u1ec7.<\/p>\n<h2>Ph\u00e2n t\u00edch c\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a Data Scraping.<\/h2>\n<p>Qu\u00e9t d\u1eef li\u1ec7u cung c\u1ea5p m\u1ed9t s\u1ed1 t\u00ednh n\u0103ng ch\u00ednh gi\u00fap n\u00f3 tr\u1edf th\u00e0nh m\u1ed9t c\u00f4ng c\u1ee5 m\u1ea1nh m\u1ebd v\u00e0 linh ho\u1ea1t \u0111\u1ec3 thu th\u1eadp d\u1eef li\u1ec7u:<\/p>\n<ol>\n<li>\n<p><strong>Thu th\u1eadp d\u1eef li\u1ec7u t\u1ef1 \u0111\u1ed9ng<\/strong>: Qu\u00e9t d\u1eef li\u1ec7u cho ph\u00e9p thu th\u1eadp d\u1eef li\u1ec7u t\u1ef1 \u0111\u1ed9ng v\u00e0 li\u00ean t\u1ee5c t\u1eeb nhi\u1ec1u ngu\u1ed3n, ti\u1ebft ki\u1ec7m th\u1eddi gian v\u00e0 c\u00f4ng s\u1ee9c nh\u1eadp d\u1eef li\u1ec7u th\u1ee7 c\u00f4ng.<\/p>\n<\/li>\n<li>\n<p><strong>Thu th\u1eadp d\u1eef li\u1ec7u quy m\u00f4 l\u1edbn<\/strong>: V\u1edbi t\u00ednh n\u0103ng qu\u00e9t web, m\u1ed9t l\u01b0\u1ee3ng l\u1edbn d\u1eef li\u1ec7u c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c tr\u00edch xu\u1ea5t t\u1eeb nhi\u1ec1u trang web kh\u00e1c nhau, cung c\u1ea5p c\u00e1i nh\u00ecn to\u00e0n di\u1ec7n v\u1ec1 m\u1ed9t mi\u1ec1n ho\u1eb7c th\u1ecb tr\u01b0\u1eddng c\u1ee5 th\u1ec3.<\/p>\n<\/li>\n<li>\n<p><strong>Gi\u00e1m s\u00e1t th\u1eddi gian th\u1ef1c<\/strong>: Qu\u00e9t web cho ph\u00e9p doanh nghi\u1ec7p gi\u00e1m s\u00e1t c\u00e1c thay \u0111\u1ed5i v\u00e0 c\u1eadp nh\u1eadt tr\u00ean trang web trong th\u1eddi gian th\u1ef1c, cho ph\u00e9p ph\u1ea3n \u1ee9ng nhanh ch\u00f3ng v\u1edbi xu h\u01b0\u1edbng th\u1ecb tr\u01b0\u1eddng v\u00e0 h\u00e0nh \u0111\u1ed9ng c\u1ee7a \u0111\u1ed1i th\u1ee7 c\u1ea1nh tranh.<\/p>\n<\/li>\n<li>\n<p><strong>\u0110a d\u1ea1ng d\u1eef li\u1ec7u<\/strong>: Qu\u00e9t d\u1eef li\u1ec7u c\u00f3 th\u1ec3 tr\u00edch xu\u1ea5t nhi\u1ec1u lo\u1ea1i d\u1eef li\u1ec7u kh\u00e1c nhau, bao g\u1ed3m v\u0103n b\u1ea3n, h\u00ecnh \u1ea3nh, video, v.v., mang l\u1ea1i c\u00e1i nh\u00ecn to\u00e0n di\u1ec7n v\u1ec1 th\u00f4ng tin c\u00f3 s\u1eb5n tr\u1ef1c tuy\u1ebfn.<\/p>\n<\/li>\n<li>\n<p><strong>Kinh doanh th\u00f4ng minh<\/strong>: Vi\u1ec7c thu th\u1eadp d\u1eef li\u1ec7u h\u1ed7 tr\u1ee3 t\u1ea1o ra nh\u1eefng hi\u1ec3u bi\u1ebft c\u00f3 gi\u00e1 tr\u1ecb cho vi\u1ec7c ph\u00e2n t\u00edch th\u1ecb tr\u01b0\u1eddng, nghi\u00ean c\u1ee9u \u0111\u1ed1i th\u1ee7 c\u1ea1nh tranh, t\u1ea1o kh\u00e1ch h\u00e0ng ti\u1ec1m n\u0103ng, ph\u00e2n t\u00edch t\u00ecnh c\u1ea3m, v.v.<\/p>\n<\/li>\n<\/ol>\n<h2>C\u00e1c ki\u1ec3u c\u1ea1o d\u1eef li\u1ec7u<\/h2>\n<p>Qu\u00e9t d\u1eef li\u1ec7u c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i th\u00e0nh c\u00e1c lo\u1ea1i kh\u00e1c nhau d\u1ef1a tr\u00ean t\u00ednh ch\u1ea5t c\u1ee7a trang web m\u1ee5c ti\u00eau v\u00e0 quy tr\u00ecnh tr\u00edch xu\u1ea5t d\u1eef li\u1ec7u. B\u1ea3ng sau \u0111\u00e2y ph\u00e1c th\u1ea3o c\u00e1c lo\u1ea1i qu\u00e9t d\u1eef li\u1ec7u ch\u00ednh:<\/p>\n<table>\n<thead>\n<tr>\n<th>Ki\u1ec3u<\/th>\n<th>S\u1ef1 mi\u00eau t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Qu\u00e9t web t\u0129nh<\/strong><\/td>\n<td>Tr\u00edch xu\u1ea5t d\u1eef li\u1ec7u t\u1eeb c\u00e1c trang web t\u0129nh c\u00f3 n\u1ed9i dung HTML c\u1ed1 \u0111\u1ecbnh. L\u00fd t\u01b0\u1edfng cho c\u00e1c trang web kh\u00f4ng \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt th\u01b0\u1eddng xuy\u00ean.<\/td>\n<\/tr>\n<tr>\n<td><strong>Qu\u00e9t web \u0111\u1ed9ng<\/strong><\/td>\n<td>Giao d\u1ecbch v\u1edbi c\u00e1c trang web s\u1eed d\u1ee5ng JavaScript ho\u1eb7c AJAX \u0111\u1ec3 t\u1ea3i d\u1eef li\u1ec7u \u0111\u1ed9ng. \u0110\u00f2i h\u1ecfi k\u1ef9 thu\u1eadt ti\u00ean ti\u1ebfn.<\/td>\n<\/tr>\n<tr>\n<td><strong>Qu\u00e9t ph\u01b0\u01a1ng ti\u1ec7n truy\u1ec1n th\u00f4ng x\u00e3 h\u1ed9i<\/strong><\/td>\n<td>T\u1eadp trung v\u00e0o vi\u1ec7c tr\u00edch xu\u1ea5t d\u1eef li\u1ec7u t\u1eeb nhi\u1ec1u n\u1ec1n t\u1ea3ng truy\u1ec1n th\u00f4ng x\u00e3 h\u1ed9i kh\u00e1c nhau, ch\u1eb3ng h\u1ea1n nh\u01b0 Twitter, Facebook v\u00e0 Instagram.<\/td>\n<\/tr>\n<tr>\n<td><strong>Qu\u00e9t th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed<\/strong><\/td>\n<td>Thu th\u1eadp chi ti\u1ebft s\u1ea3n ph\u1ea9m, gi\u00e1 c\u1ea3 v\u00e0 \u0111\u00e1nh gi\u00e1 t\u1eeb c\u00e1c c\u1eeda h\u00e0ng tr\u1ef1c tuy\u1ebfn. Gi\u00fap ph\u00e2n t\u00edch \u0111\u1ed1i th\u1ee7 c\u1ea1nh tranh v\u00e0 \u0111\u1ecbnh gi\u00e1.<\/td>\n<\/tr>\n<tr>\n<td><strong>Qu\u00e9t h\u00ecnh \u1ea3nh v\u00e0 video<\/strong><\/td>\n<td>Tr\u00edch xu\u1ea5t h\u00ecnh \u1ea3nh v\u00e0 video t\u1eeb c\u00e1c trang web, h\u1eefu \u00edch cho vi\u1ec7c ph\u00e2n t\u00edch ph\u01b0\u01a1ng ti\u1ec7n v\u00e0 t\u1ed5ng h\u1ee3p n\u1ed9i dung.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>C\u00e1ch s\u1eed d\u1ee5ng Qu\u00e9t d\u1eef li\u1ec7u, c\u00e1c v\u1ea5n \u0111\u1ec1 v\u00e0 gi\u1ea3i ph\u00e1p li\u00ean quan \u0111\u1ebfn vi\u1ec7c s\u1eed d\u1ee5ng.<\/h2>\n<p>Qu\u00e9t d\u1eef li\u1ec7u t\u00ecm th\u1ea5y c\u00e1c \u1ee9ng d\u1ee5ng trong c\u00e1c ng\u00e0nh v\u00e0 tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng kh\u00e1c nhau:<\/p>\n<h3>C\u00e1c \u1ee9ng d\u1ee5ng c\u1ee7a Data Scraping:<\/h3>\n<ol>\n<li>\n<p><strong>Nghi\u00ean c\u1ee9u th\u1ecb tr\u01b0\u1eddng<\/strong>: Qu\u00e9t web gi\u00fap doanh nghi\u1ec7p theo d\u00f5i gi\u00e1 c\u1ea3, danh m\u1ee5c s\u1ea3n ph\u1ea9m v\u00e0 \u0111\u00e1nh gi\u00e1 c\u1ee7a kh\u00e1ch h\u00e0ng c\u1ee7a \u0111\u1ed1i th\u1ee7 c\u1ea1nh tranh \u0111\u1ec3 \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh s\u00e1ng su\u1ed1t.<\/p>\n<\/li>\n<li>\n<p><strong>T\u1ea1o kh\u00e1ch h\u00e0ng ti\u1ec1m n\u0103ng<\/strong>: Tr\u00edch xu\u1ea5t th\u00f4ng tin li\u00ean h\u1ec7 t\u1eeb c\u00e1c trang web cho ph\u00e9p c\u00e1c c\u00f4ng ty x\u00e2y d\u1ef1ng danh s\u00e1ch ti\u1ebfp th\u1ecb \u0111\u01b0\u1ee3c nh\u1eafm m\u1ee5c ti\u00eau.<\/p>\n<\/li>\n<li>\n<p><strong>T\u1ed5ng h\u1ee3p n\u1ed9i dung<\/strong>: Vi\u1ec7c tr\u00edch xu\u1ea5t n\u1ed9i dung t\u1eeb nhi\u1ec1u ngu\u1ed3n kh\u00e1c nhau s\u1ebd h\u1ed7 tr\u1ee3 vi\u1ec7c t\u1ea1o ra c\u00e1c n\u1ec1n t\u1ea3ng n\u1ed9i dung v\u00e0 c\u00f4ng c\u1ee5 t\u1ed5ng h\u1ee3p tin t\u1ee9c \u0111\u01b0\u1ee3c tuy\u1ec3n ch\u1ecdn.<\/p>\n<\/li>\n<li>\n<p><strong>Ph\u00e2n t\u00edch t\u00ecnh c\u1ea3m<\/strong>: Thu th\u1eadp d\u1eef li\u1ec7u t\u1eeb m\u1ea1ng x\u00e3 h\u1ed9i cho ph\u00e9p doanh nghi\u1ec7p \u0111\u00e1nh gi\u00e1 t\u00ecnh c\u1ea3m c\u1ee7a kh\u00e1ch h\u00e0ng \u0111\u1ed1i v\u1edbi s\u1ea3n ph\u1ea9m v\u00e0 th\u01b0\u01a1ng hi\u1ec7u c\u1ee7a h\u1ecd.<\/p>\n<\/li>\n<\/ol>\n<h3>V\u1ea5n \u0111\u1ec1 v\u00e0 gi\u1ea3i ph\u00e1p:<\/h3>\n<ol>\n<li>\n<p><strong>Thay \u0111\u1ed5i c\u1ea5u tr\u00fac trang web<\/strong>: C\u00e1c trang web c\u00f3 th\u1ec3 c\u1eadp nh\u1eadt thi\u1ebft k\u1ebf ho\u1eb7c c\u1ea5u tr\u00fac c\u1ee7a ch\u00fang, khi\u1ebfn c\u00e1c t\u1eadp l\u1ec7nh thu th\u1eadp d\u1eef li\u1ec7u b\u1ecb h\u1ecfng. Vi\u1ec7c b\u1ea3o tr\u00ec v\u00e0 c\u1eadp nh\u1eadt th\u01b0\u1eddng xuy\u00ean c\u00e1c t\u1eadp l\u1ec7nh thu th\u1eadp d\u1eef li\u1ec7u c\u00f3 th\u1ec3 gi\u1ea3m thi\u1ec3u v\u1ea5n \u0111\u1ec1 n\u00e0y.<\/p>\n<\/li>\n<li>\n<p><strong>Ch\u1eb7n IP<\/strong>: C\u00e1c trang web c\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh v\u00e0 ch\u1eb7n c\u00e1c bot qu\u00e9t d\u1ef1a tr\u00ean \u0111\u1ecba ch\u1ec9 IP. Proxy lu\u00e2n phi\u00ean c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 tr\u00e1nh ch\u1eb7n IP v\u00e0 ph\u00e2n ph\u1ed1i y\u00eau c\u1ea7u.<\/p>\n<\/li>\n<li>\n<p><strong>M\u1ed1i quan t\u00e2m v\u1ec1 ph\u00e1p l\u00fd v\u00e0 \u0111\u1ea1o \u0111\u1ee9c<\/strong>: Vi\u1ec7c thu th\u1eadp d\u1eef li\u1ec7u ph\u1ea3i tu\u00e2n th\u1ee7 c\u00e1c \u0111i\u1ec1u kho\u1ea3n d\u1ecbch v\u1ee5 c\u1ee7a trang web m\u1ee5c ti\u00eau v\u00e0 t\u00f4n tr\u1ecdng lu\u1eadt ri\u00eang t\u01b0. T\u00ednh minh b\u1ea1ch v\u00e0 th\u1ef1c h\u00e0nh c\u1ea1o c\u00f3 tr\u00e1ch nhi\u1ec7m l\u00e0 r\u1ea5t c\u1ea7n thi\u1ebft.<\/p>\n<\/li>\n<li>\n<p><strong>CAPTCHA v\u00e0 c\u01a1 ch\u1ebf ch\u1ed1ng qu\u00e9t<\/strong>: M\u1ed9t s\u1ed1 trang web tri\u1ec3n khai CAPTCHA v\u00e0 c\u00e1c bi\u1ec7n ph\u00e1p ch\u1ed1ng sao ch\u00e9p. Tr\u00ecnh gi\u1ea3i CAPTCHA v\u00e0 k\u1ef9 thu\u1eadt t\u00ecm ki\u1ebfm n\u00e2ng cao c\u00f3 th\u1ec3 gi\u1ea3i quy\u1ebft th\u00e1ch th\u1ee9c n\u00e0y.<\/p>\n<\/li>\n<\/ol>\n<h2>C\u00e1c \u0111\u1eb7c \u0111i\u1ec3m ch\u00ednh v\u00e0 c\u00e1c so s\u00e1nh kh\u00e1c v\u1edbi c\u00e1c thu\u1eadt ng\u1eef t\u01b0\u01a1ng t\u1ef1 d\u01b0\u1edbi d\u1ea1ng b\u1ea3ng v\u00e0 danh s\u00e1ch.<\/h2>\n<table>\n<thead>\n<tr>\n<th>\u0111\u1eb7c tr\u01b0ng<\/th>\n<th>Qu\u00e9t d\u1eef li\u1ec7u<\/th>\n<th>Thu th\u1eadp d\u1eef li\u1ec7u<\/th>\n<th>Khai th\u00e1c d\u1eef li\u1ec7u<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>M\u1ee5c \u0111\u00edch<\/strong><\/td>\n<td>Tr\u00edch xu\u1ea5t d\u1eef li\u1ec7u c\u1ee5 th\u1ec3 t\u1eeb c\u00e1c trang web<\/td>\n<td>L\u1eadp ch\u1ec9 m\u1ee5c v\u00e0 ph\u00e2n t\u00edch n\u1ed9i dung web<\/td>\n<td>Kh\u00e1m ph\u00e1 c\u00e1c m\u1eabu v\u00e0 th\u00f4ng tin chi ti\u1ebft trong b\u1ed9 d\u1eef li\u1ec7u l\u1edbn<\/td>\n<\/tr>\n<tr>\n<td><strong>Ph\u1ea1m vi<\/strong><\/td>\n<td>T\u1eadp trung v\u00e0o khai th\u00e1c d\u1eef li\u1ec7u m\u1ee5c ti\u00eau<\/td>\n<td>B\u1ea3o hi\u1ec3m to\u00e0n di\u1ec7n v\u1ec1 n\u1ed9i dung web<\/td>\n<td>Ph\u00e2n t\u00edch c\u00e1c b\u1ed9 d\u1eef li\u1ec7u hi\u1ec7n c\u00f3<\/td>\n<\/tr>\n<tr>\n<td><strong>T\u1ef1 \u0111\u1ed9ng h\u00f3a<\/strong><\/td>\n<td>T\u1ef1 \u0111\u1ed9ng h\u00f3a cao b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c t\u1eadp l\u1ec7nh v\u00e0 c\u00f4ng c\u1ee5<\/td>\n<td>Th\u01b0\u1eddng \u0111\u01b0\u1ee3c t\u1ef1 \u0111\u1ed9ng h\u00f3a nh\u01b0ng vi\u1ec7c x\u00e1c minh th\u1ee7 c\u00f4ng l\u00e0 ph\u1ed5 bi\u1ebfn<\/td>\n<td>Thu\u1eadt to\u00e1n t\u1ef1 \u0111\u1ed9ng \u0111\u1ec3 kh\u00e1m ph\u00e1 m\u1eabu<\/td>\n<\/tr>\n<tr>\n<td><strong>Ngu\u1ed3n d\u1eef li\u1ec7u<\/strong><\/td>\n<td>Trang web v\u00e0 trang web<\/td>\n<td>Trang web v\u00e0 trang web<\/td>\n<td>C\u01a1 s\u1edf d\u1eef li\u1ec7u v\u00e0 d\u1eef li\u1ec7u c\u00f3 c\u1ea5u tr\u00fac<\/td>\n<\/tr>\n<tr>\n<td><strong>Tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng<\/strong><\/td>\n<td>Nghi\u00ean c\u1ee9u th\u1ecb tr\u01b0\u1eddng, t\u1ea1o kh\u00e1ch h\u00e0ng ti\u1ec1m n\u0103ng, thu th\u1eadp n\u1ed9i dung<\/td>\n<td>C\u00f4ng c\u1ee5 t\u00ecm ki\u1ebfm, t\u1ed1i \u01b0u SEO<\/td>\n<td>Kinh doanh th\u00f4ng minh, ph\u00e2n t\u00edch d\u1ef1 \u0111o\u00e1n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>C\u00e1c quan \u0111i\u1ec3m v\u00e0 c\u00f4ng ngh\u1ec7 trong t\u01b0\u01a1ng lai li\u00ean quan \u0111\u1ebfn vi\u1ec7c Qu\u00e9t d\u1eef li\u1ec7u.<\/h2>\n<p>T\u01b0\u01a1ng lai c\u1ee7a vi\u1ec7c thu th\u1eadp d\u1eef li\u1ec7u c\u00f3 nhi\u1ec1u kh\u1ea3 n\u0103ng th\u00fa v\u1ecb, \u0111\u01b0\u1ee3c th\u00fac \u0111\u1ea9y b\u1edfi nh\u1eefng ti\u1ebfn b\u1ed9 trong c\u00f4ng ngh\u1ec7 v\u00e0 nhu c\u1ea7u t\u1eadp trung v\u00e0o d\u1eef li\u1ec7u ng\u00e0y c\u00e0ng t\u0103ng. M\u1ed9t s\u1ed1 quan \u0111i\u1ec3m v\u00e0 c\u00f4ng ngh\u1ec7 c\u1ea7n ch\u00fa \u00fd bao g\u1ed3m:<\/p>\n<ol>\n<li>\n<p><strong>H\u1ecdc m\u00e1y trong Scraping<\/strong>: T\u00edch h\u1ee3p c\u00e1c thu\u1eadt to\u00e1n h\u1ecdc m\u00e1y \u0111\u1ec3 n\u00e2ng cao \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a vi\u1ec7c tr\u00edch xu\u1ea5t d\u1eef li\u1ec7u v\u00e0 x\u1eed l\u00fd c\u00e1c c\u1ea5u tr\u00fac web ph\u1ee9c t\u1ea1p.<\/p>\n<\/li>\n<li>\n<p><strong>X\u1eed l\u00fd ng\u00f4n ng\u1eef t\u1ef1 nhi\u00ean (NLP)<\/strong>: T\u1eadn d\u1ee5ng NLP \u0111\u1ec3 tr\u00edch xu\u1ea5t v\u00e0 ph\u00e2n t\u00edch d\u1eef li\u1ec7u v\u0103n b\u1ea3n, cho ph\u00e9p hi\u1ec3u bi\u1ebft s\u00e2u s\u1eafc h\u01a1n.<\/p>\n<\/li>\n<li>\n<p><strong>API qu\u00e9t web<\/strong>: S\u1ef1 gia t\u0103ng c\u1ee7a c\u00e1c API qu\u00e9t web chuy\u00ean d\u1ee5ng gi\u00fap \u0111\u01a1n gi\u1ea3n h\u00f3a qu\u00e1 tr\u00ecnh qu\u00e9t v\u00e0 cung c\u1ea5p tr\u1ef1c ti\u1ebfp d\u1eef li\u1ec7u c\u00f3 c\u1ea5u tr\u00fac.<\/p>\n<\/li>\n<li>\n<p><strong>Qu\u00e9t d\u1eef li\u1ec7u \u0111\u1ea1o \u0111\u1ee9c<\/strong>: Nh\u1ea5n m\u1ea1nh v\u00e0o c\u00e1c bi\u1ec7n ph\u00e1p thu th\u1eadp d\u1eef li\u1ec7u c\u00f3 tr\u00e1ch nhi\u1ec7m, tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh v\u1ec1 quy\u1ec1n ri\u00eang t\u01b0 d\u1eef li\u1ec7u v\u00e0 nguy\u00ean t\u1eafc \u0111\u1ea1o \u0111\u1ee9c.<\/p>\n<\/li>\n<\/ol>\n<h2>C\u00e1ch s\u1eed d\u1ee5ng ho\u1eb7c li\u00ean k\u1ebft m\u00e1y ch\u1ee7 proxy v\u1edbi vi\u1ec7c thu th\u1eadp d\u1eef li\u1ec7u.<\/h2>\n<p>M\u00e1y ch\u1ee7 proxy \u0111\u00f3ng m\u1ed9t vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c qu\u00e9t d\u1eef li\u1ec7u, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong c\u00e1c ho\u1ea1t \u0111\u1ed9ng qu\u00e9t quy m\u00f4 l\u1edbn ho\u1eb7c th\u01b0\u1eddng xuy\u00ean. H\u1ecd cung c\u1ea5p nh\u1eefng l\u1ee3i \u00edch sau:<\/p>\n<ol>\n<li>\n<p><strong>Xoay v\u00f2ng IP<\/strong>: M\u00e1y ch\u1ee7 proxy cho ph\u00e9p ng\u01b0\u1eddi qu\u00e9t d\u1eef li\u1ec7u xoay \u0111\u1ecba ch\u1ec9 IP c\u1ee7a h\u1ecd, ng\u0103n ch\u1eb7n vi\u1ec7c ch\u1eb7n IP v\u00e0 tr\u00e1nh s\u1ef1 nghi ng\u1edd t\u1eeb c\u00e1c trang web m\u1ee5c ti\u00eau.<\/p>\n<\/li>\n<li>\n<p><strong>\u1ea9n danh<\/strong>: Proxy \u1ea9n \u0111\u1ecba ch\u1ec9 IP th\u1ef1c c\u1ee7a m\u00e1y qu\u00e9t, duy tr\u00ec t\u00ednh \u1ea9n danh trong qu\u00e1 tr\u00ecnh tr\u00edch xu\u1ea5t d\u1eef li\u1ec7u.<\/p>\n<\/li>\n<li>\n<p><strong>\u0110\u1ecbnh v\u1ecb \u0111\u1ecba l\u00fd<\/strong>: V\u1edbi c\u00e1c m\u00e1y ch\u1ee7 proxy \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf c\u00e1c khu v\u1ef1c kh\u00e1c nhau, ng\u01b0\u1eddi d\u1ecdn d\u1eb9p c\u00f3 th\u1ec3 truy c\u1eadp d\u1eef li\u1ec7u b\u1ecb gi\u1edbi h\u1ea1n v\u1ec1 m\u1eb7t \u0111\u1ecba l\u00fd v\u00e0 xem c\u00e1c trang web nh\u01b0 th\u1ec3 h\u1ecd \u0111ang duy\u1ec7t t\u1eeb c\u00e1c v\u1ecb tr\u00ed c\u1ee5 th\u1ec3.<\/p>\n<\/li>\n<li>\n<p><strong>Ph\u00e2n ph\u1ed1i t\u1ea3i<\/strong>: B\u1eb1ng c\u00e1ch ph\u00e2n ph\u1ed1i y\u00eau c\u1ea7u gi\u1eefa nhi\u1ec1u proxy, ng\u01b0\u1eddi d\u1ecdn d\u1eb9p d\u1eef li\u1ec7u c\u00f3 th\u1ec3 qu\u1ea3n l\u00fd t\u1ea3i m\u00e1y ch\u1ee7 v\u00e0 ng\u0103n ch\u1eb7n t\u00ecnh tr\u1ea1ng qu\u00e1 t\u1ea3i tr\u00ean m\u1ed9t IP.<\/p>\n<\/li>\n<\/ol>\n<h2>Li\u00ean k\u1ebft li\u00ean quan<\/h2>\n<p>\u0110\u1ec3 bi\u1ebft th\u00eam th\u00f4ng tin v\u1ec1 vi\u1ec7c thu th\u1eadp d\u1eef li\u1ec7u v\u00e0 c\u00e1c ch\u1ee7 \u0111\u1ec1 li\u00ean quan, b\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o c\u00e1c t\u00e0i nguy\u00ean sau:<\/p>\n<ul>\n<li><a href=\"https:\/\/en.wikipedia.org\/wiki\/Web_scraping\" target=\"_new\" rel=\"noopener nofollow\">Qu\u00e9t web Wikipedia<\/a><\/li>\n<li><a href=\"https:\/\/www.crummy.com\/software\/BeautifulSoup\/bs4\/doc\/\" target=\"_new\" rel=\"noopener nofollow\">T\u00e0i li\u1ec7u v\u1ec1 m\u00f3n s\u00fap \u0111\u1eb9p<\/a><\/li>\n<li><a href=\"https:\/\/scrapy.org\/\" target=\"_new\" rel=\"noopener nofollow\">Trang web ch\u00ednh th\u1ee9c c\u1ee7a Scrapy<\/a><\/li>\n<li><a href=\"https:\/\/www.selenium.dev\/documentation\/en\/webdriver\/\" target=\"_new\" rel=\"noopener nofollow\">Qu\u00e9t web b\u1eb1ng Selenium<\/a><\/li>\n<li><a href=\"https:\/\/towardsdatascience.com\/the-ethics-of-web-scraping-49a005f83505\" target=\"_new\" rel=\"noopener nofollow\">\u0110\u1ea1o \u0111\u1ee9c c\u1ee7a vi\u1ec7c qu\u00e9t web<\/a><\/li>\n<\/ul>","protected":false},"featured_media":468146,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-476702","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>Data Scraping: Unveiling Hidden Insights<\/mark>","faq_items":[{"question":"What is data scraping, and how does it work?","answer":"<p>Data scraping, also known as web scraping or data harvesting, is a process of extracting information from websites and web pages using automated tools or scripts. It involves navigating through websites, retrieving specific data like text, images, and links, and saving it in a structured format for analysis.<\/p>"},{"question":"What is the history of data scraping?","answer":"<p>The origins of data scraping can be traced back to the early days of the internet when businesses and researchers sought efficient methods to collect data from websites. The first mention of data scraping can be found in academic papers discussing techniques to automate the extraction of data from HTML documents.<\/p>"},{"question":"What are the key features of data scraping?","answer":"<p>Data scraping offers several key features, including automated data collection, large-scale data acquisition, real-time monitoring, data diversity, and business intelligence generation.<\/p>"},{"question":"What are the types of data scraping?","answer":"<p>Data scraping can be categorized into different types, such as static web scraping, dynamic web scraping, social media scraping, e-commerce scraping, and image and video scraping.<\/p>"},{"question":"How can data scraping be used?","answer":"<p>Data scraping finds applications in various industries, including market research, lead generation, content aggregation, and sentiment analysis.<\/p>"},{"question":"What are the common problems in data scraping and their solutions?","answer":"<p>Common problems in data scraping include website structure changes, IP blocking, legal and ethical concerns, and CAPTCHAs. Solutions include regular script maintenance, rotating proxies, ethical practices, and CAPTCHA solvers.<\/p>"},{"question":"How does data scraping compare to data crawling and data mining?","answer":"<p>Data scraping involves extracting specific data from websites, while data crawling focuses on indexing and analyzing web content. Data mining, on the other hand, is about discovering patterns and insights in large datasets.<\/p>"},{"question":"What are the future perspectives of data scraping?","answer":"<p>The future of data scraping includes the integration of machine learning, natural language processing, web scraping APIs, and an emphasis on ethical scraping practices.<\/p>"},{"question":"How are proxy servers associated with data scraping?","answer":"<p>Proxy servers play a vital role in data scraping by offering IP rotation, anonymity, geolocation, and load distribution, enabling smoother and more effective data extraction.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/476702","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\/476702\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media\/468146"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media?parent=476702"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}