{"id":920330,"date":"2024-01-02T07:22:03","date_gmt":"2024-01-02T07:22:03","guid":{"rendered":"https:\/\/proxyelite.info\/targets\/web-scraper\/"},"modified":"2024-01-02T07:22:03","modified_gmt":"2024-01-02T07:22:03","slug":"web-scraper","status":"publish","type":"targets","link":"https:\/\/proxyelite.info\/vi\/targets\/web-scraper\/","title":{"rendered":"Tr\u00ecnh qu\u00e9t web"},"content":{"rendered":"<p>Qu\u00e9t web \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t c\u00f4ng c\u1ee5 kh\u00f4ng th\u1ec3 thi\u1ebfu trong th\u1ebf gi\u1edbi d\u1ef1a tr\u00ean d\u1eef li\u1ec7u ng\u00e0y nay. N\u00f3 cho ph\u00e9p c\u00e1c doanh nghi\u1ec7p v\u00e0 c\u00e1 nh\u00e2n thu th\u1eadp th\u00f4ng tin c\u00f3 gi\u00e1 tr\u1ecb t\u1eeb c\u00e1c trang web m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3. Qu\u00e9t web li\u00ean quan \u0111\u1ebfn vi\u1ec7c tr\u00edch xu\u1ea5t d\u1eef li\u1ec7u t\u1eeb c\u00e1c trang web v\u00e0 chuy\u1ec3n \u0111\u1ed5i n\u00f3 th\u00e0nh \u0111\u1ecbnh d\u1ea1ng c\u00f3 c\u1ea5u tr\u00fac \u0111\u1ec3 ph\u00e2n t\u00edch ho\u1eb7c l\u01b0u tr\u1eef. Qu\u00e1 tr\u00ecnh n\u00e0y \u0111\u1eb7c bi\u1ec7t h\u1eefu \u00edch cho c\u00e1c nhi\u1ec7m v\u1ee5 nh\u01b0 nghi\u00ean c\u1ee9u th\u1ecb tr\u01b0\u1eddng, theo d\u00f5i gi\u00e1, t\u1ed5ng h\u1ee3p n\u1ed9i dung, v.v.<\/p>\n<h2>Kh\u00e1m ph\u00e1 th\u1ebf gi\u1edbi qu\u00e9t web<\/h2>\n<p>Qu\u00e9t web \u0111\u00e3 ph\u00e1t tri\u1ec3n \u0111\u00e1ng k\u1ec3 qua nhi\u1ec1u n\u0103m v\u00e0 ng\u00e0y nay, n\u00f3 bao g\u1ed3m m\u1ed9t lo\u1ea1t c\u00e1c k\u1ef9 thu\u1eadt v\u00e0 c\u00f4ng c\u1ee5. M\u1ed9t s\u1ed1 ph\u01b0\u01a1ng ph\u00e1p v\u00e0 c\u00f4ng c\u1ee5 qu\u00e9t web ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/p>\n<h3>1. C\u1ea1o th\u1ee7 c\u00f4ng<\/h3>\n<ul>\n<li>Qu\u00e9t th\u1ee7 c\u00f4ng bao g\u1ed3m vi\u1ec7c sao ch\u00e9p v\u00e0 d\u00e1n d\u1eef li\u1ec7u t\u1eeb c\u00e1c trang web v\u00e0o t\u1ec7p ho\u1eb7c b\u1ea3ng t\u00ednh c\u1ee5c b\u1ed9.<\/li>\n<li>\u0110\u00e2y l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p c\u01a1 b\u1ea3n ph\u00f9 h\u1ee3p \u0111\u1ec3 tr\u00edch xu\u1ea5t d\u1eef li\u1ec7u quy m\u00f4 nh\u1ecf nh\u01b0ng t\u1ed1n th\u1eddi gian v\u00e0 kh\u00f4ng th\u1ef1c t\u1ebf \u0111\u1ed1i v\u1edbi c\u00e1c d\u1ef1 \u00e1n quy m\u00f4 l\u1edbn.<\/li>\n<\/ul>\n<h3>2. Ph\u1ea7n m\u1ec1m qu\u00e9t web<\/h3>\n<ul>\n<li>Ph\u1ea7n m\u1ec1m qu\u00e9t web chuy\u00ean d\u1ee5ng nh\u01b0 BeautifulSoup, Scrapy v\u00e0 Selenium cung c\u1ea5p kh\u1ea3 n\u0103ng t\u1ef1 \u0111\u1ed9ng h\u00f3a n\u00e2ng cao h\u01a1n.<\/li>\n<li>Nh\u1eefng c\u00f4ng c\u1ee5 n\u00e0y cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng ch\u1ec9 \u0111\u1ecbnh d\u1eef li\u1ec7u h\u1ecd mu\u1ed1n tr\u00edch xu\u1ea5t v\u00e0 t\u1ef1 \u0111\u1ed9ng h\u00f3a qu\u00e1 tr\u00ecnh thu th\u1eadp d\u1eef li\u1ec7u.<\/li>\n<\/ul>\n<h3>3. D\u1ecbch v\u1ee5 Scraping d\u1ef1a tr\u00ean \u0111\u00e1m m\u00e2y<\/h3>\n<ul>\n<li>C\u00e1c d\u1ecbch v\u1ee5 qu\u00e9t web d\u1ef1a tr\u00ean \u0111\u00e1m m\u00e2y, ch\u1eb3ng h\u1ea1n nh\u01b0 Scrapestack, cung c\u1ea5p kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng v\u00e0 \u0111\u1ed9 tin c\u1eady.<\/li>\n<li>C\u00e1c d\u1ecbch v\u1ee5 n\u00e0y x\u1eed l\u00fd c\u00e1c kh\u00eda c\u1ea1nh k\u1ef9 thu\u1eadt c\u1ee7a vi\u1ec7c thu th\u1eadp d\u1eef li\u1ec7u v\u00e0 cung c\u1ea5p d\u1eef li\u1ec7u c\u00f3 c\u1ea5u tr\u00fac theo th\u1eddi gian th\u1ef1c.<\/li>\n<\/ul>\n<h3>4. API qu\u00e9t web<\/h3>\n<ul>\n<li>M\u1ed9t s\u1ed1 trang web cung c\u1ea5p API (Giao di\u1ec7n l\u1eadp tr\u00ecnh \u1ee9ng d\u1ee5ng) cho ph\u00e9p nh\u00e0 ph\u00e1t tri\u1ec3n truy c\u1eadp d\u1eef li\u1ec7u \u1edf \u0111\u1ecbnh d\u1ea1ng c\u00f3 c\u1ea5u tr\u00fac.<\/li>\n<li>Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y \u0111\u00e1ng tin c\u1eady v\u00e0 h\u1ee3p ph\u00e1p h\u01a1n so v\u1edbi vi\u1ec7c l\u1ea5y d\u1eef li\u1ec7u tr\u1ef1c ti\u1ebfp t\u1eeb c\u00e1c trang web.<\/li>\n<\/ul>\n<h2>Proxy v\u00e0 qu\u00e9t web<\/h2>\n<p>M\u00e1y ch\u1ee7 proxy \u0111\u00f3ng m\u1ed9t vai tr\u00f2 quan tr\u1ecdng trong qu\u00e1 tr\u00ecnh qu\u00e9t web, \u0111\u1eb7c bi\u1ec7t \u0111\u1ed1i v\u1edbi c\u00e1c t\u00e1c v\u1ee5 qu\u00e9t quy m\u00f4 l\u1edbn ho\u1eb7c ph\u1ee9c t\u1ea1p. Proxy \u0111\u00f3ng vai tr\u00f2 trung gian gi\u1eefa c\u00f4ng c\u1ee5 qu\u00e9t v\u00e0 trang web m\u1ee5c ti\u00eau, mang l\u1ea1i m\u1ed9t s\u1ed1 l\u1ee3i th\u1ebf:<\/p>\n<h3>1. \u0110a d\u1ea1ng \u0111\u1ecba ch\u1ec9 IP<\/h3>\n<ul>\n<li>Proxy cho ph\u00e9p b\u1ea1n th\u1ef1c hi\u1ec7n y\u00eau c\u1ea7u t\u1eeb nhi\u1ec1u \u0111\u1ecba ch\u1ec9 IP, gi\u1ea3m nguy c\u01a1 b\u1ecb c\u1ea5m ho\u1eb7c h\u1ea1n ch\u1ebf IP t\u1eeb c\u00e1c trang web.<\/li>\n<li>\u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t c\u00f3 gi\u00e1 tr\u1ecb khi thu th\u1eadp d\u1eef li\u1ec7u t\u1eeb c\u00e1c trang web c\u00f3 ch\u00ednh s\u00e1ch truy c\u1eadp nghi\u00eam ng\u1eb7t.<\/li>\n<\/ul>\n<h3>2. T\u00ednh linh ho\u1ea1t v\u1ec1 v\u1ecb tr\u00ed \u0111\u1ecba l\u00fd<\/h3>\n<ul>\n<li>Proxy c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh \u0111\u1ec3 \u0111\u1ecbnh tuy\u1ebfn c\u00e1c y\u00eau c\u1ea7u th\u00f4ng qua c\u00e1c m\u00e1y ch\u1ee7 \u1edf c\u00e1c v\u1ecb tr\u00ed \u0111\u1ecba l\u00fd kh\u00e1c nhau.<\/li>\n<li>\u0110i\u1ec1u n\u00e0y gi\u00fap truy c\u1eadp d\u1eef li\u1ec7u theo v\u00f9ng c\u1ee5 th\u1ec3 ho\u1eb7c tr\u00e1nh c\u00e1c gi\u1edbi h\u1ea1n v\u1ec1 \u0111\u1ecba l\u00fd.<\/li>\n<\/ul>\n<h3>3. \u1ea8n danh v\u00e0 b\u1ea3o m\u1eadt<\/h3>\n<ul>\n<li>Vi\u1ec7c s\u1eed d\u1ee5ng proxy \u0111\u1ea3m b\u1ea3o t\u00ednh \u1ea9n danh c\u1ee7a tr\u00ecnh qu\u00e9t, b\u1ea3o v\u1ec7 danh t\u00ednh v\u00e0 quy\u1ec1n ri\u00eang t\u01b0 c\u1ee7a b\u1ea1n trong qu\u00e1 tr\u00ecnh qu\u00e9t.<\/li>\n<li>N\u00f3 c\u0169ng b\u1ed5 sung th\u00eam m\u1ed9t l\u1edbp b\u1ea3o m\u1eadt v\u00ec trang web m\u1ee5c ti\u00eau nh\u1eadn th\u1ea5y c\u00e1c y\u00eau c\u1ea7u \u0111\u1ebfn t\u1eeb c\u00e1c \u0111\u1ecba ch\u1ec9 IP kh\u00e1c nhau.<\/li>\n<\/ul>\n<h2>L\u00fd do n\u00ean s\u1eed d\u1ee5ng proxy trong vi\u1ec7c qu\u00e9t web<\/h2>\n<p>C\u00f3 m\u1ed9t s\u1ed1 l\u00fd do thuy\u1ebft ph\u1ee5c \u0111\u1ec3 k\u1ebft h\u1ee3p proxy v\u00e0o quy tr\u00ecnh qu\u00e9t web c\u1ee7a b\u1ea1n:<\/p>\n<h3>1. Tr\u00e1nh ch\u1eb7n IP<\/h3>\n<ul>\n<li>Nhi\u1ec1u trang web s\u1eed d\u1ee5ng c\u01a1 ch\u1ebf ch\u1eb7n IP \u0111\u1ec3 ng\u0103n ch\u1eb7n vi\u1ec7c thu th\u1eadp th\u00f4ng tin qu\u00e1 m\u1ee9c ho\u1eb7c qu\u00e1 kh\u00edch.<\/li>\n<li>Proxy gi\u00fap ph\u00e2n ph\u1ed1i y\u00eau c\u1ea7u tr\u00ean c\u00e1c \u0111\u1ecba ch\u1ec9 IP kh\u00e1c nhau, gi\u1ea3m nguy c\u01a1 b\u1ecb ch\u1eb7n.<\/li>\n<\/ul>\n<h3>2. \u0110\u1ea3m b\u1ea3o c\u1ea1o kh\u00f4ng b\u1ecb gi\u00e1n \u0111o\u1ea1n<\/h3>\n<ul>\n<li>Proxy cung c\u1ea5p \u0111\u1ed9 tin c\u1eady b\u1eb1ng c\u00e1ch cho ph\u00e9p b\u1ea1n chuy\u1ec3n sang \u0111\u1ecba ch\u1ec9 IP m\u1edbi n\u1ebfu \u0111\u1ecba ch\u1ec9 \u0111\u00f3 b\u1ecb ch\u1eb7n.<\/li>\n<li>\u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o vi\u1ec7c thu th\u1eadp d\u1eef li\u1ec7u kh\u00f4ng b\u1ecb gi\u00e1n \u0111o\u1ea1n, ngay c\u1ea3 t\u1eeb c\u00e1c trang web c\u00f3 bi\u1ec7n ph\u00e1p ch\u1ed1ng qu\u00e9t nghi\u00eam ng\u1eb7t.<\/li>\n<\/ul>\n<h3>3. Duy tr\u00ec \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a d\u1eef li\u1ec7u<\/h3>\n<ul>\n<li>Proxy cho ph\u00e9p b\u1ea1n truy c\u1eadp c\u00e1c trang web t\u1eeb c\u00e1c v\u1ecb tr\u00ed kh\u00e1c nhau, \u0111\u1ea3m b\u1ea3o r\u1eb1ng b\u1ea1n thu th\u1eadp d\u1eef li\u1ec7u ch\u00ednh x\u00e1c v\u00e0 to\u00e0n di\u1ec7n.<\/li>\n<li>\u0110i\u1ec1u n\u00e0y r\u1ea5t c\u1ea7n thi\u1ebft cho nghi\u00ean c\u1ee9u th\u1ecb tr\u01b0\u1eddng v\u00e0 ph\u00e2n t\u00edch c\u1ea1nh tranh.<\/li>\n<\/ul>\n<h2>Nh\u1eefng th\u00e1ch th\u1ee9c c\u1ee7a vi\u1ec7c s\u1eed d\u1ee5ng proxy trong vi\u1ec7c qu\u00e9t web<\/h2>\n<p>M\u1eb7c d\u00f9 proxy mang l\u1ea1i nhi\u1ec1u l\u1ee3i \u00edch nh\u01b0ng c\u0169ng c\u00f3 nh\u1eefng th\u00e1ch th\u1ee9c c\u1ea7n xem x\u00e9t:<\/p>\n<h3>1. L\u1ef1a ch\u1ecdn proxy<\/h3>\n<ul>\n<li>Vi\u1ec7c ch\u1ecdn \u0111\u00fang nh\u00e0 cung c\u1ea5p v\u00e0 lo\u1ea1i proxy l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 qu\u00e9t th\u00e0nh c\u00f4ng.<\/li>\n<li>C\u00e1c y\u1ebfu t\u1ed1 nh\u01b0 t\u1ed1c \u0111\u1ed9, \u0111\u1ed9 tin c\u1eady v\u00e0 t\u00f9y ch\u1ecdn \u0111\u1ecbnh v\u1ecb \u0111\u1ecba l\u00fd c\u1ea7n \u0111\u01b0\u1ee3c t\u00ednh \u0111\u1ebfn.<\/li>\n<\/ul>\n<h3>2. Chi ph\u00ed<\/h3>\n<ul>\n<li>D\u1ecbch v\u1ee5 proxy ch\u1ea5t l\u01b0\u1ee3ng cao c\u00f3 th\u1ec3 \u0111i k\u00e8m v\u1edbi m\u1ee9c gi\u00e1.<\/li>\n<li>Tuy nhi\u00ean, kho\u1ea3n \u0111\u1ea7u t\u01b0 th\u01b0\u1eddng mang l\u1ea1i k\u1ebft qu\u1ea3 v\u1ec1 m\u1eb7t tr\u00edch xu\u1ea5t d\u1eef li\u1ec7u th\u00e0nh c\u00f4ng v\u00e0 gi\u1ea3m thi\u1ec3u th\u1eddi gian ng\u1eebng ho\u1ea1t \u0111\u1ed9ng.<\/li>\n<\/ul>\n<h2>T\u1ea1i sao ch\u1ecdn ProxyElite cho nhu c\u1ea7u qu\u00e9t web c\u1ee7a b\u1ea1n<\/h2>\n<p>ProxyElite n\u1ed5i b\u1eadt l\u00e0 nh\u00e0 cung c\u1ea5p m\u00e1y ch\u1ee7 proxy h\u00e0ng \u0111\u1ea7u cho vi\u1ec7c qu\u00e9t web, cung c\u1ea5p m\u1ed9t lo\u1ea1t c\u00e1c t\u00ednh n\u0103ng ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u c\u1ee7a nh\u1eefng ng\u01b0\u1eddi qu\u00e9t web:<\/p>\n<ul>\n<li>\n<p><strong>Nh\u00f3m proxy l\u1edbn<\/strong>: ProxyElite duy tr\u00ec m\u1ed9t nh\u00f3m proxy r\u1ed9ng l\u1edbn v\u00e0 \u0111a d\u1ea1ng, \u0111\u1ea3m b\u1ea3o b\u1ea1n c\u00f3 quy\u1ec1n truy c\u1eadp v\u00e0o nhi\u1ec1u \u0111\u1ecba ch\u1ec9 IP.<\/p>\n<\/li>\n<li>\n<p><strong>T\u1ed1c \u0111\u1ed9 cao v\u00e0 \u0111\u1ed9 tin c\u1eady<\/strong>: Proxy c\u1ee7a ch\u00fang t\u00f4i \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a v\u1ec1 t\u1ed1c \u0111\u1ed9 v\u00e0 \u0111\u1ed9 tin c\u1eady, gi\u1ea3m thi\u1ec3u th\u1eddi gian ng\u1eebng ho\u1ea1t \u0111\u1ed9ng trong qu\u00e1 tr\u00ecnh qu\u00e9t.<\/p>\n<\/li>\n<li>\n<p><strong>T\u00f9y ch\u1ecdn nh\u1eafm m\u1ee5c ti\u00eau theo \u0111\u1ecba l\u00fd<\/strong>: B\u1ea1n c\u00f3 th\u1ec3 ch\u1ecdn proxy t\u1eeb nhi\u1ec1u v\u1ecb tr\u00ed kh\u00e1c nhau \u0111\u1ec3 truy c\u1eadp d\u1eef li\u1ec7u theo v\u00f9ng c\u1ee5 th\u1ec3.<\/p>\n<\/li>\n<li>\n<p><strong>H\u1ed7 tr\u1ee3 kh\u00e1ch h\u00e0ng 24\/7<\/strong>: Ch\u00fang t\u00f4i cung c\u1ea5p d\u1ecbch v\u1ee5 h\u1ed7 tr\u1ee3 kh\u00e1ch h\u00e0ng 24\/24 \u0111\u1ec3 gi\u00fap b\u1ea1n gi\u1ea3i quy\u1ebft m\u1ecdi v\u1ea5n \u0111\u1ec1 ho\u1eb7c th\u1eafc m\u1eafc.<\/p>\n<\/li>\n<li>\n<p><strong>B\u1ea3o m\u1eadt d\u1eef li\u1ec7u<\/strong>: ProxyElite \u01b0u ti\u00ean b\u1ea3o m\u1eadt v\u00e0 quy\u1ec1n ri\u00eang t\u01b0 c\u1ee7a ng\u01b0\u1eddi d\u00f9ng, \u0111\u1ea3m b\u1ea3o c\u00e1c ho\u1ea1t \u0111\u1ed9ng qu\u00e9t web c\u1ee7a b\u1ea1n v\u1eabn \u1ea9n danh v\u00e0 an to\u00e0n.<\/p>\n<\/li>\n<\/ul>\n<p>T\u00f3m l\u1ea1i, qu\u00e9t web l\u00e0 m\u1ed9t k\u1ef9 thu\u1eadt m\u1ea1nh m\u1ebd \u0111\u1ec3 thu th\u1eadp d\u1eef li\u1ec7u t\u1eeb web v\u00e0 proxy l\u00e0 c\u00f4ng c\u1ee5 thi\u1ebft y\u1ebfu \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o s\u1ef1 th\u00e0nh c\u00f4ng c\u1ee7a n\u00f3. B\u1eb1ng c\u00e1ch ch\u1ecdn ProxyElite l\u00e0m nh\u00e0 cung c\u1ea5p m\u00e1y ch\u1ee7 proxy, b\u1ea1n c\u00f3 th\u1ec3 t\u1ed1i \u01b0u h\u00f3a n\u1ed7 l\u1ef1c qu\u00e9t web c\u1ee7a m\u00ecnh, v\u01b0\u1ee3t qua c\u00e1c th\u00e1ch th\u1ee9c v\u00e0 khai th\u00e1c to\u00e0n b\u1ed9 ti\u1ec1m n\u0103ng c\u1ee7a vi\u1ec7c tr\u00edch xu\u1ea5t d\u1eef li\u1ec7u web.<\/p>","protected":false},"featured_media":920331,"menu_order":0,"template":"","meta":{"_acf_changed":false,"inline_featured_image":false},"target-categories":[21],"class_list":["post-920330","targets","type-targets","status-publish","has-post-thumbnail","hentry","target-categories-web-scrapers"],"acf":[],"_links":{"self":[{"href":"https:\/\/proxyelite.info\/vi\/wp-json\/wp\/v2\/targets\/920330","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/proxyelite.info\/vi\/wp-json\/wp\/v2\/targets"}],"about":[{"href":"https:\/\/proxyelite.info\/vi\/wp-json\/wp\/v2\/types\/targets"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/proxyelite.info\/vi\/wp-json\/wp\/v2\/media\/920331"}],"wp:attachment":[{"href":"https:\/\/proxyelite.info\/vi\/wp-json\/wp\/v2\/media?parent=920330"}],"wp:term":[{"taxonomy":"target-categories","embeddable":true,"href":"https:\/\/proxyelite.info\/vi\/wp-json\/wp\/v2\/target-categories?post=920330"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}