{"id":233226,"date":"2023-02-09T16:27:00","date_gmt":"2023-02-09T13:27:00","guid":{"rendered":"https:\/\/wordpress.mediadoma.com\/?p=233226"},"modified":"2022-11-10T19:59:15","modified_gmt":"2022-11-10T16:59:15","slug":"fallstudie-anvaend-phpquery-foer-att-genomsoeka-3000-bilder-fraan-tumblr","status":"publish","type":"post","link":"https:\/\/wordpress.mediadoma.com\/sv\/fallstudie-anvaend-phpquery-foer-att-genomsoeka-3000-bilder-fraan-tumblr\/","title":{"rendered":"Fallstudie: anv\u00e4nd PHPQuery f\u00f6r att genoms\u00f6ka 3000 bilder fr\u00e5n Tumblr"},"content":{"rendered":"

Det finns n\u00e5gra fina bilder p\u00e5 Tumblr. Vi kan anv\u00e4nda Tumblr API:er f\u00f6r att s\u00f6ka och ladda ner bilder, men detta kr\u00e4ver vanligtvis registrering och API-nycklar. Ett annat s\u00e4tt \u00e4r att genoms\u00f6ka HTML-webbsidorna och analysera DOM (Document Object Model)<\/a>, vilket g\u00f6r att vi kan h\u00e4mta bildens webbadresser och deras beskrivningar.<\/p>\n

Det finns ett praktiskt bibliotek som heter PHPQuery. Det till\u00e5ter oss att skriva JQuery-stil PHP<\/a> p\u00e5 det s\u00e4tt som vi skriver JQuery<\/a>, med hj\u00e4lp av CSS-v\u00e4ljare. Det g\u00f6r PHP kraftfull f\u00f6r att analysera DOM f\u00f6r alla HTML-sidor.<\/p>\n

phpquery<\/p>\n

F\u00f6ljande \u00e4r en psudo-kod som illustrerar hur man analyserar HTML<\/a> – sidorna och tar tag i bilderna.<\/p>\n

Med PHPQuery blir det s\u00e5 mycket l\u00e4ttare att analysera DOM!<\/a> Klicka f\u00f6r att tweeta<\/a><\/p>\n

require('phpQuery.php');\nrequire('app.php');\n\u00a0\n$ip = get_ip_address();\n\u00a0\nfunction grab($url, $lvl = 5) {\n\u00a0 global $ip;\n\u00a0 if ($lvl < = 0) {\n\u00a0 \u00a0 return;\n\u00a0 }\n\u00a0 $doc = phpQuery::newDocumentFile($url);\n\u00a0 foreach(pq('div.TumbPostPane') as $p) {\n\u00a0 \u00a0 \u00a0 $img = pq($p)->find('img.PhotoPostMainPhoto')->attr('src');\n\u00a0 \u00a0 \u00a0 $desc = htmlspecialchars(trim(pq($p)->find('div.MetaPanel')->html()));\n\u00a0 \u00a0 \u00a0 $url = pq($p)->find('a')->attr('href');\n\u00a0 \u00a0 \u00a0 $err = '';\n\u00a0 \u00a0 \u00a0 if (UploadPic($img, $desc, $err, $ip)) { \/\/ find pictures and save locally\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0echo \"OK = $err n\";\n\u00a0 \u00a0 \u00a0 } else {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0echo str_replace(\"<br \/>\", \"n\", \"Error = $err n\");\n\u00a0 \u00a0 \u00a0 } \u00a0 \u00a0 \n\u00a0 \u00a0 \u00a0 grab($url, $lvl - 1); \/\/ recursive download\n\u00a0 }\n}\n\u00a0\ngrab(\"<a class=\"vglnk\" target=\"_blank\" href=\"https:\/\/uploadbeta.com\" rel=\"nofollow\"><span>https<\/span><span>:\/\/<\/span><span>uploadbeta<\/span><span>.<\/span><span>com<\/span><\/a>\", 1); <\/code><\/pre>\n
Med liten modifiering kan du l\u00e5ta skriptet genoms\u00f6ka flera tusen bilder inom n\u00e5gra minuter. Alla bilder sparas i lokala databaser i VPS-servern<\/a>. Bilderna kan ses p\u00e5: uploadbeta.com<\/a><\/p>\n
Det \u00e4r b\u00e4ttre att st\u00e4lla in ett tidsintervall mellan genoms\u00f6kning av sidor, annars kan IP-adressen<\/a> blockeras.<\/p>\n
\"Fallstudie:<\/a><\/p>\n
Genoms\u00f6kning av bild<\/p>\n
PS, webbplatsen f\u00f6r bilduppladdning st\u00f6der n\u00e5gra API:er f\u00f6r olika \u00e4ndam\u00e5l som omfattas av policyn f\u00f6r till\u00e5ten anv\u00e4ndning: https:\/\/uploadbeta.com\/picture-gallery\/faq.php#api<\/a><\/p>\n
Inspelningsk\u00e4lla:  helloacm.com<\/a><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"
Fallstudie: anv\u00e4nd PHPQuery f\u00f6r att genoms\u00f6ka 3000 bilder fr\u00e5n Tumblr<\/p>\n","protected":false},"author":1,"featured_media":220869,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_wp_rev_ctl_limit":""},"categories":[1022,901,848,901,922,1110,1022,922,807,807,848],"tags":[1173],"class_list":["post-233226","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-anvandbara-webbplatser","category-koda","category-handledningar","category-oevrig","category-n-a","category-php-9","tag-affiai-sv"],"_links":{"self":[{"href":"https:\/\/wordpress.mediadoma.com\/sv\/wp-json\/wp\/v2\/posts\/233226","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wordpress.mediadoma.com\/sv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wordpress.mediadoma.com\/sv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wordpress.mediadoma.com\/sv\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wordpress.mediadoma.com\/sv\/wp-json\/wp\/v2\/comments?post=233226"}],"version-history":[{"count":0,"href":"https:\/\/wordpress.mediadoma.com\/sv\/wp-json\/wp\/v2\/posts\/233226\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/wordpress.mediadoma.com\/sv\/wp-json\/wp\/v2\/media\/220869"}],"wp:attachment":[{"href":"https:\/\/wordpress.mediadoma.com\/sv\/wp-json\/wp\/v2\/media?parent=233226"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wordpress.mediadoma.com\/sv\/wp-json\/wp\/v2\/categories?post=233226"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wordpress.mediadoma.com\/sv\/wp-json\/wp\/v2\/tags?post=233226"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}