“} obj.status ” ” obj.response {“<\/title><br \/>\n<\/head><br \/>\n<body><\/p>\n<h1>Error “} obj.status ” ” obj.response {“<\/h1>\n<p>“} obj.response {“<\/p>\n<h3>Guru Meditation:<\/h3>\n<p>XID: “} req.xid {“<\/p>\n<address>\n<a href=\"http:\/\/www.varnish-cache.org\/\">Varnish<\/a><br \/>\n<\/address>\n<p><\/body><br \/>\n<\/html><br \/>\n“};<br \/>\n}<\/p>\n<p>return (deliver);<br \/>\n}[\/code]<\/p>\n<p>Hope someone will find this useful as I had to put some effort to find out all the internal Varnish function names<\/p>\n<div id=\"fb-like\" style=\"\"><iframe src=\"http:\/\/www.facebook.com\/plugins\/like.php?href=https:\/\/mohanjith.net\/blog\/2009\/08\/using-custom-error-pages-in-varnish.html&layout=standard&show_faces=true&width=300&action=like&font=&colorscheme=light&locale=en_US\" scrolling=\"no\" frameborder=\"0\" allowTransparency=\"true\" style=\"border:none; overflow:hidden; width:300px; height:30px\"><\/iframe><\/div>","protected":false},"excerpt":{"rendered":"<p>While playing around with the fancy error pages I wanted to use them with Varnish as well. Since there is no means to include a file or serve a file from Varnish (without serving from a back end server), I went with inline C snippet to read and serve the error pages. Please note that … <a title=\"Using custom error pages in Varnish\" class=\"read-more\" href=\"https:\/\/mohanjith.net\/blog\/2009\/08\/using-custom-error-pages-in-varnish.html\" aria-label=\"More on Using custom error pages in Varnish\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"enabled":false},"version":2}},"categories":[209],"tags":[459,211],"class_list":["post-391","post","type-post","status-publish","format-standard","hentry","category-errors","tag-errors","tag-varnish"],"aioseo_notices":[],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p5lUHm-6j","jetpack_likes_enabled":false,"_links":{"self":[{"href":"https:\/\/mohanjith.net\/blog\/wp-json\/wp\/v2\/posts\/391","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mohanjith.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mohanjith.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mohanjith.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mohanjith.net\/blog\/wp-json\/wp\/v2\/comments?post=391"}],"version-history":[{"count":23,"href":"https:\/\/mohanjith.net\/blog\/wp-json\/wp\/v2\/posts\/391\/revisions"}],"predecessor-version":[{"id":394,"href":"https:\/\/mohanjith.net\/blog\/wp-json\/wp\/v2\/posts\/391\/revisions\/394"}],"wp:attachment":[{"href":"https:\/\/mohanjith.net\/blog\/wp-json\/wp\/v2\/media?parent=391"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mohanjith.net\/blog\/wp-json\/wp\/v2\/categories?post=391"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mohanjith.net\/blog\/wp-json\/wp\/v2\/tags?post=391"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}

{"id":391,"date":"2009-08-24T11:24:40","date_gmt":"2009-08-24T11:24:40","guid":{"rendered":"https:\/\/www.mohanjith.net\/blog\/?p=391"},"modified":"2010-04-30T09:47:47","modified_gmt":"2010-04-30T09:47:47","slug":"using-custom-error-pages-in-varnish","status":"publish","type":"post","link":"https:\/\/mohanjith.net\/blog\/2009\/08\/using-custom-error-pages-in-varnish.html","title":{"rendered":"Using custom error pages in Varnish"},"content":{"rendered":"

While playing around with the fancy error pages<\/a> I wanted to use them with Varnish<\/a> as well. Since there is no means to include a file or serve a file from Varnish (without serving from a back end server), I went with inline C snippet to read and serve the error pages. Please note that the style sheet and the images are being served from a CDN. Otherwise it will have to be cached prior to the back end server becoming inaccessible. Here<\/a> is the whole vcl_error sub. You will notice that we fall back to default Varnish error page for anything other than 5XX errors.<\/p>\n

[code lang=’c’]sub vcl_error {
\nset obj.http.Content-Type = “text\/html; charset=utf-8”;<\/p>\n

if ( obj.status >= 500 && obj.status <= 505) {\nC{\n#include
\n#include <\/p>\n

FILE * pFile;
\nchar content [100];
\nchar page [10240];
\nchar fname [50];<\/p>\n

page[0] = ‘\\0’;
\nsprintf(fname, “\/var\/www\/errors\/%d.html”, VRT_r_obj_status(sp));<\/p>\n