sub vcl_recv { if (req.method == "PRI") { /* We do not support SPDY or HTTP/2.0 */ return (synth(405)); } if (req.method != "GET" && req.method != "HEAD" && req.method != "PUT" && req.method != "POST" && req.method != "TRACE" && req.method != "OPTIONS" && req.method != "DELETE") { /* Non-RFC2616 or CONNECT which is weird. */ return (pipe); } if (req.method != "GET" && req.method != "HEAD") { /* We only deal with GET and HEAD by default */ return (pass); } if (req.http.Authorization || req.http.Cookie) { /* Not cacheable by default */ return (pass); } return (hash); }
sub vcl_pipe { # By default Connection: close is set on all piped requests, to stop # connection reuse from sending future requests directly to the # (potentially) wrong backend. If you do want this to happen, you can undo # it here. # unset bereq.http.connection; return (pipe); } sub vcl_pass { return (fetch); } sub vcl_hash { hash_data(req.url); if (req.http.host) { hash_data(req.http.host); } else { hash_data(server.ip); } return (lookup); }
sub vcl_purge { return (synth(200, "Purged")); } sub vcl_hit { if (obj.ttl >= 0s) { // A pure unadultered hit, deliver it return (deliver); } if (obj.ttl + obj.grace > 0s) { // Object is in grace, deliver it // Automatically triggers a background fetch return (deliver); } // fetch & deliver once we get the result return (miss); } sub vcl_miss { return (fetch); } sub vcl_deliver { return (deliver); }
{ "disclaimer": "Exchange rates provided for informational purposes only and do not constitute financial advice of any kind. Although every attempt is made to ensure quality, no guarantees are made of accuracy, validity, availability, or fitness for any purpose. All usage subject to acceptance of Terms: https://openexchangerates.org/ terms/", "license": "Data sourced from various providers; resale prohibited; no warranties given of any kind. All usage subject to License Agreement: https://openexchangerates.org/license/", "timestamp": 1463137208, "base": "USD", "rates": { "AED": 3.67297, "AFN": 68.589998, "ALL": 121.4755, "AMD": 479.452503, "ANG": 1.78875, "AOA": 165.784832, "ARS": 14.19349, "AUD": 1.372985, "AWG": 1.793333, https://openexchangerates.org/api/latest.json?app_id=123
sub vcl_recv { set req.http.Surrogate-Capability = "key=ESI/1.0"; } sub vcl_backend_response { if (beresp.http.Surrogate-Control ~ "ESI/1.0") { unset beresp.http.Surrogate-Control; set beresp.do_esi = true; } } Edge Side Includes
header("Cache-Control: public,must-revalidate,s-maxage=10"); echo "Date in the ESI tag: ".date('Y-m-d H:i:s').' '; header("Cache-Control: no-store"); header(“Surrogate-Control: content='ESI/1.0'"); echo ''.PHP_EOL; echo "Date in the main page: ".date('Y-m-d H:i:s').' '; Main page ESI frame: esi.php Cached for 10 seconds Not cached
sub vcl_backend_response { if (beresp.ttl <= 0s || beresp.http.Set-Cookie || beresp.http.Vary == "*") { set beresp.ttl = 120s; set beresp.uncacheable = true; return (deliver); } } Control Time To Live
Match Query Multi Match Query Bool Query Boosting Query Common Terms Query Constant Score Query Dis Max Query Filtered Query Fuzzy Like This Query Fuzzy Like This Field Query Function Score Query Fuzzy Query GeoShape Query Has Child Query Has Parent Query Ids Query Indices Query Match All Query More Like This Query Nested Query Prefix Query Query String Query Simple Query String Query Range Query Regexp Query Span First Query Span Multi Term Query Span Near Query Span Not Query Span Or Query Span Term Query Term Query Terms Query Top Children Query Wildcard Query Minimum Should Match Multi Term Query Rewrite Template Query
✓Cache all images, js, css, woff, … ✓Cache dynamic pages ✓ESI or AJAX for user-specific content ✓Sanitize HTTP input/output ✓Gateway to your application Where does Varnish fit in?
✓Secondary database (NoSQL) ✓RDBMS can remain the source of truth ✓Store in fixed format (no joins) ✓Full-text search ✓Fast retrieval of data projections ✓Aggregations Where does ElasticSearch fit in?
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