{"id":7212,"date":"2023-02-16T08:15:58","date_gmt":"2023-02-16T01:15:58","guid":{"rendered":"https:\/\/webvocuc.com\/blog\/?p=7212"},"modified":"2023-02-16T08:15:58","modified_gmt":"2023-02-16T01:15:58","slug":"web-scraping-va-ung-dung-cua-web-scraping","status":"publish","type":"post","link":"https:\/\/webvocuc.com\/blog\/web-scraping-va-ung-dung-cua-web-scraping.html","title":{"rendered":"Web scraping v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a Web scraping"},"content":{"rendered":"

Web scraping<\/a> v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a Web scraping t\u1ea5t c\u1ea3 s\u1ebd \u0111\u01b0\u1ee3c \u0111\u1ec1 c\u1eadp trong b\u00e0i vi\u1ebft sau.<\/p>\n

Web scraping l\u00e0 g\u00ec?<\/strong><\/h2>\n

\"Web<\/p>\n

V\u1ec1 t\u1ed5ng th\u1ec3, web scraping l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 tr\u00edch xu\u1ea5t d\u1eef li\u1ec7u c\u1ee7a m\u1ed9t website v\u00e0 sau \u0111\u00f3 xu\u1ea5t ra m\u1ed9t \u0111\u1ecbnh d\u1ea1ng hi\u1ec3n th\u1ecb kh\u00e1c. Web scraping c\u00f2n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c g\u1ecdi v\u1edbi nh\u1eefng t\u00ean g\u1ecdi kh\u00e1c nh\u01b0 site scraping hay data scraping<\/strong>.<\/p>\n

\u1ee8ng d\u1ee5ng c\u1ee7a web scraping<\/strong><\/h2>\n

C\u00f4ng c\u1ee5 t\u00ecm ki\u1ebfm<\/strong><\/h3>\n

R\u1ea5t nhi\u1ec1u ng\u01b0\u1eddi s\u1ebd b\u1ea5t ng\u1edd ph\u00e1t hi\u1ec7n ra Google ch\u00ednh l\u00e0 web scraper l\u1edbn nh\u1ea5t kh\u00f4ng gian m\u1ea1ng internet hi\u1ec7n nay. Th\u1ef1c v\u1eady, c\u00e1c c\u00f4ng c\u1ee5 t\u00ecm ki\u1ebfm nh\u01b0 Google<\/a>, Bing hay Yahoo ch\u00ednh l\u00e0 nh\u1eefng \u1ee9ng d\u1ee5ng \u0111i\u1ec3n h\u00ecnh cho web scraping.<\/p>\n

\u0110\u1ec3 s\u1eafp x\u1ebfp th\u1ee9 t\u1ef1 c\u00e1c website, bot crawler<\/strong> c\u1ee7a c\u00e1c c\u00f4ng c\u1ee5 t\u00ecm ki\u1ebfm kh\u00f4ng ng\u1eebng th\u1ef1c hi\u1ec7n vi\u1ec7c tr\u00edch xu\u1ea5t n\u1ed9i dung c\u1ee7a trang web. D\u1eef li\u1ec7u v\u1ec1 n\u1ed9i dung website s\u1ebd \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o thu\u1eadt to\u00e1n v\u00f4 c\u00f9ng ph\u1ee9c t\u1ea1p \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 c\u00e1c trang web theo ti\u00eau ch\u00ed c\u1ee7a m\u1ed7i c\u00f4ng c\u1ee5 t\u00ecm ki\u1ebfm.<\/p>\n

Nghi\u00ean c\u1ee9u th\u1ecb tr\u01b0\u1eddng<\/strong><\/h3>\n

\"Web<\/p>\n

Web scraping l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 h\u1ed7 tr\u1ee3 \u0111\u1eafc l\u1ef1c cho c\u00e1c c\u00f4ng ty v\u00e0 \u1ee9ng d\u1ee5ng nghi\u00ean c\u1ee9u th\u1ecb tr\u01b0\u1eddng<\/strong>. L\u00fd do ch\u00ednh l\u00e0 b\u1edfi c\u00f4ng vi\u1ec7c n\u00e0y \u0111\u00f2i h\u1ecfi ph\u1ea3i thu th\u1eadp m\u1ed9t l\u01b0\u1ee3ng data si\u00eau kh\u1ed5ng l\u1ed3 t\u1eeb r\u1ea5t nhi\u1ec1u ngu\u1ed3n kh\u00e1c nhau.<\/p>\n

Ng\u01b0\u1eddi ta s\u1ebd s\u1eed d\u1ee5ng c\u00e1c bot crawler \u0111\u1ec3 tr\u00edch xu\u1ea5t th\u00f4ng s\u1ed1 li\u00ean quan t\u1edbi c\u00e1c th\u00e0nh ph\u1ea7n c\u1ea7n nghi\u00ean c\u1ee9u v\u00e0 t\u1ed5ng h\u1ee3p l\u1ea1i \u0111\u1ec3 c\u00f3 m\u1ed9t c\u01a1 s\u1edf d\u1eef li\u1ec7u ho\u00e0n ch\u1ec9nh nh\u1ea5t. T\u1eeb k\u1ebft qu\u1ea3 \u0111\u00f3, ng\u01b0\u1eddi ta c\u00f3 th\u1ec3 ph\u00e2n t\u00edch v\u00e0 x\u00e1c \u0111\u1ecbnh xu h\u01b0\u1edbng c\u1ee7a th\u1ecb tr\u01b0\u1eddng v\u00e0 d\u1ef1 \u0111o\u00e1n s\u1ef1 chuy\u1ec3n d\u1ecbch c\u1ee7a th\u1ecb tr\u01b0\u1eddng trong t\u01b0\u01a1ng lai.<\/p>\n

Theo d\u00f5i gi\u00e1 c\u1ea3<\/strong><\/h3>\n

Web scraping \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng nhi\u1ec1u ch\u1ee7 y\u1ebfu trong c\u00e1c c\u00f4ng c\u1ee5 theo d\u00f5i, so s\u00e1nh gi\u00e1 c\u1ea3 tr\u00ean th\u1ecb tr\u01b0\u1eddng. N\u1ebfu nh\u01b0 nh\u1eefng ng\u01b0\u1eddi c\u00f3 l\u1ee3i khi s\u1eed d\u1ee5ng web scraping trong nghi\u00ean c\u1ee9u th\u1ecb tr\u01b0\u1eddng l\u00e0 c\u00e1c nh\u00e0 ti\u1ebfp th\u1ecb, th\u00ec ng\u01b0\u1eddi ti\u00eau d\u00f9ng ch\u00ednh l\u00e0 kh\u00e1ch h\u00e0ng tr\u1ef1c ti\u1ebfp c\u1ee7a c\u00e1c \u1ee9ng d\u1ee5ng so s\u00e1nh gi\u00e1 c\u1ea3.<\/p>\n

Ch\u1eb3ng h\u1ea1n b\u00ean c\u1ea1nh so s\u00e1nh gi\u00e1 v\u00e9 m\u00e1y bay c\u00e1c lo\u1ea1i, n\u00f3 c\u00f2n \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 l\u1ea5y th\u00f4ng tin gi\u00e1 xe bu\u00fdt, gi\u00e1 ph\u00f2ng kh\u00e1ch s\u1ea1n, so s\u00e1nh gi\u00e1 th\u1ecbt c\u00e1 hay s\u1ea3n ph\u1ea9m th\u1ef1c ph\u1ea9m ch\u1ee9c n\u0103ng\u2026<\/p>\n

C\u00f2n n\u1eefa, c\u00e1c nh\u00e0 \u0111\u1ea7u t\u01b0 s\u1ebd kh\u00f4ng th\u1ec3 n\u00e0o thi\u1ebfu nh\u1eefng c\u00f4ng c\u1ee5 so s\u00e1nh v\u00e0 theo d\u00f5i gi\u00e1 c\u1ed5 phi\u1ebfu. V\u1edbi h\u00e0ng ch\u1ee5c lo\u1ea1i c\u1ed5 phi\u1ebfu c\u00f9ng h\u00e0ng ng\u00e0n giao d\u1ecbch m\u1ed7i ng\u00e0y, c\u00e1c c\u00f4ng c\u1ee5 theo d\u00f5i gi\u00e1 c\u1ed5 phi\u1ebfu s\u1ebd gi\u00fap h\u1ecd t\u00ednh to\u00e1n \u0111\u1ea7u t\u01b0 ch\u00ednh x\u00e1c h\u01a1n.<\/p>\n

Website t\u1ed5ng h\u1ee3p tin t\u1ee9c \u2013 C\u1ed5ng th\u00f4ng tin<\/strong><\/h3>\n

\"Web<\/p>\n

Trong l\u00fac l\u01b0\u1edbt web kh\u00e1c c\u00f3 th\u1ec3 b\u1ea1n s\u1ebd b\u1eaft g\u1eb7p nh\u1eefng website tin t\u1ee9c<\/strong> nh\u01b0ng kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t t\u1edd b\u00e1o h\u1eb3n hoi. Ng\u00e0y nay Internet c\u00f3 v\u00f4 s\u1ed1 c\u00e1c trang web nh\u01b0 v\u1eady ho\u1eb7c g\u1ea7n gi\u1ed1ng nh\u01b0 v\u1eady. Ch\u00fang \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 c\u00e1c c\u1ed5ng th\u00f4ng tin \u2013 cung c\u1ea5p m\u1ed9t l\u01b0\u1ee3ng tin t\u1ee9c l\u1edbn v\u00e0 \u0111a d\u1ea1ng h\u01a1n h\u1eb3n m\u1ed9t t\u1edd b\u00e1o \u0111\u01a1n l\u1ebb n\u00e0o \u0111\u00f3 kh\u00e1c.<\/p>\n

\u0110\u00f4i khi, c\u1ed5ng th\u00f4ng tin c\u0169ng kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t website m\u00e0 ch\u1ec9 l\u00e0 m\u1ed9t \u1ee9ng d\u1ee5ng, th\u01b0\u1eddng th\u1ea5y nh\u1ea5t l\u00e0 \u1ee9ng d\u1ee5ng di \u0111\u1ed9ng ho\u1eb7c \u1ee9ng d\u1ee5ng \u0111\u1ecdc tin t\u1ee9c tr\u00ean trang m\u1edbi (newtab) c\u1ee7a m\u1ed9t tr\u00ecnh duy\u1ec7t web.<\/p>\n

T\u1ea5t c\u1ea3 nh\u1eefng bi\u1ebfn th\u1ec3 n\u00e0y \u0111\u1ec1u ho\u1ea1t \u0111\u1ed9ng gi\u1ed1ng nhau:<\/strong> crawl b\u00e0i vi\u1ebft t\u1eeb v\u00f4 v\u00e0n \u0111\u1ea7u b\u00e1o kh\u00e1c nhau tr\u01b0\u1edbc khi hi\u1ec3n th\u1ecb cho kh\u00e1n gi\u1ea3 xem. Website t\u1ed5ng h\u1ee3p tin t\u1ee9c l\u00e0 m\u1ed9t trong nh\u1eefng \u1ee9ng d\u1ee5ng web scraping nhi\u1ec1u nh\u1ea5t hi\u1ec7n nay.<\/p>\n","protected":false},"excerpt":{"rendered":"

Web scraping v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a Web scraping t\u1ea5t c\u1ea3 s\u1ebd \u0111\u01b0\u1ee3c \u0111\u1ec1 c\u1eadp trong b\u00e0i vi\u1ebft sau. Web scraping l\u00e0 g\u00ec? V\u1ec1 t\u1ed5ng th\u1ec3, web scraping l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 tr\u00edch xu\u1ea5t d\u1eef li\u1ec7u c\u1ee7a m\u1ed9t website v\u00e0 sau \u0111\u00f3 xu\u1ea5t ra m\u1ed9t \u0111\u1ecbnh d\u1ea1ng hi\u1ec3n th\u1ecb kh\u00e1c. Web scraping c\u00f2n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c […]<\/p>\n","protected":false},"author":3,"featured_media":7407,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[8],"tags":[579],"class_list":["post-7212","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-thiet-ke-website","tag-web-scraping"],"jetpack_featured_media_url":"https:\/\/webvocuc.com\/blog\/wp-content\/uploads\/2022\/10\/Web-scraping-la-gi-1-e1666058217411.jpg","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/webvocuc.com\/blog\/wp-json\/wp\/v2\/posts\/7212","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/webvocuc.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/webvocuc.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/webvocuc.com\/blog\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/webvocuc.com\/blog\/wp-json\/wp\/v2\/comments?post=7212"}],"version-history":[{"count":11,"href":"https:\/\/webvocuc.com\/blog\/wp-json\/wp\/v2\/posts\/7212\/revisions"}],"predecessor-version":[{"id":7934,"href":"https:\/\/webvocuc.com\/blog\/wp-json\/wp\/v2\/posts\/7212\/revisions\/7934"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/webvocuc.com\/blog\/wp-json\/wp\/v2\/media\/7407"}],"wp:attachment":[{"href":"https:\/\/webvocuc.com\/blog\/wp-json\/wp\/v2\/media?parent=7212"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/webvocuc.com\/blog\/wp-json\/wp\/v2\/categories?post=7212"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/webvocuc.com\/blog\/wp-json\/wp\/v2\/tags?post=7212"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}