{"id":478,"date":"2012-08-30T15:59:00","date_gmt":"2012-08-30T15:59:00","guid":{"rendered":"http:\/\/www.b.shuttle.de\/hayek\/Hayek\/Jochen\/wp\/blog-en\/2012\/08\/30\/scraping-related-how-does-a-browser-tell-a-web-server-that-it-doesnt-want-javascript\/"},"modified":"2012-08-30T15:59:00","modified_gmt":"2012-08-30T15:59:00","slug":"scraping-related-how-does-a-browser-tell-a-web-server-that-it-doesnt-want-javascript","status":"publish","type":"post","link":"https:\/\/wp.jochen.hayek.name\/blog-en\/2012\/08\/30\/scraping-related-how-does-a-browser-tell-a-web-server-that-it-doesnt-want-javascript\/","title":{"rendered":"[scraping related] how does a browser tell a web-server, that it doesn&#8217;t want JavaScript?"},"content":{"rendered":"<p>\t\t\t\tRephrasing \u2026<br \/>\nIf I tell a browser to not &#8220;accept&#8221; JavaScript, what does the browser do with that directive?<\/p>\n<ul>\n<li>is that related to the User-Agent or Accept HTTP header fields?<\/li>\n<li>does that &#8220;just&#8221; mean, that the browser doesn&#8217;t execute the JavaScript bits?<\/li>\n<\/ul>\n<p>\n(where to disable JavaScript in browsers? [<a href=\"http:\/\/blog-en.jochen.hayek.name\/2012\/08\/where-to-disable-javascript-in-browsers.html\">link<\/a>])<\/p>\n<p>Does Michael Schrenk talk about this in his book or on the related <a href=\"http:\/\/www.webbotsspidersscreenscrapers.com\/\">website<\/a>?<\/p>\n<p><a href=\"http:\/\/shop.oreilly.com\/product\/9781593273972.do\">Webbots, Spiders, and Screen Scrapers<\/a>:<a href=\"http:\/\/oreilly.com\/catalog\/9781593273972\/\"><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/covers.oreilly.com\/images\/9781593273972\/bkt.gif\"><\/a><\/p>\n<div>\n<\/div>\n<div>\n<\/div>\n<div>\n<\/div>\n<div>\n<\/div>\n<div>\n<\/div>\n<div>\n<\/div>\n<div>\n<\/div>\n<div>\nHe mentions JavaScript a couple of times.<\/div>\n<div>\n<ul>\n<li>&#8220;JavaScript can change a form just before submission&#8221;, page 70 \u2013 nope<\/li>\n<li>&#8220;bizarre JavaScript and cookie behavior&#8221;, page 229\u00a0\u2013 nope<\/li>\n<li>&#8220;web design techniques that hinder search engine spiders&#8221;, esp. JavaScript, page 300\u00a0\u2013 nope<\/li>\n<li>&#8220;killing spiders&#8221;, &#8220;use cookies, encryption, JavaScript, and redirection&#8221;, page 313 \u2013 nope<\/li>\n<\/ul>\n<\/div>\n<div>\n\u2026<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Rephrasing \u2026 If I tell a browser to not &#8220;accept&#8221; JavaScript, what does the browser do with that directive? is that related to the User-Agent or Accept HTTP header fields? does that &#8220;just&#8221; mean, that the browser doesn&#8217;t execute the JavaScript bits? (where to disable JavaScript in browsers? [link]) Does Michael Schrenk talk about this [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false,"_share_on_mastodon":"0"},"categories":[666],"tags":[],"class_list":["post-478","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"share_on_mastodon":{"url":"","error":""},"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/paO0kP-7I","jetpack_likes_enabled":true,"amp_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/wp.jochen.hayek.name\/blog-en\/wp-json\/wp\/v2\/posts\/478","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wp.jochen.hayek.name\/blog-en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wp.jochen.hayek.name\/blog-en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wp.jochen.hayek.name\/blog-en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wp.jochen.hayek.name\/blog-en\/wp-json\/wp\/v2\/comments?post=478"}],"version-history":[{"count":0,"href":"https:\/\/wp.jochen.hayek.name\/blog-en\/wp-json\/wp\/v2\/posts\/478\/revisions"}],"wp:attachment":[{"href":"https:\/\/wp.jochen.hayek.name\/blog-en\/wp-json\/wp\/v2\/media?parent=478"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wp.jochen.hayek.name\/blog-en\/wp-json\/wp\/v2\/categories?post=478"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wp.jochen.hayek.name\/blog-en\/wp-json\/wp\/v2\/tags?post=478"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}