Programador Novato

#SOLO SE PUEDE PURGAR ATRAVEZ DE URLS ESPECIFICAS
acl purge {
    “localhost”;
    “127.0.0.1”;
}

#ESTA FUNCION ES USADA CUANDO EL CLIENTE REALIZA UNA PETICION (BROWSER DEL CLIENTE)
sub vcl_recv {
    #REDIRECCIONAR DE HTTP A HTTPS
    if ( (req.http.host ~ “^(?i)www.dominio.com” || req.http.host ~ “^(?i)dominio.com“) && req.http.X-Forwarded-Proto !~ “(?i)https”) {
        return (synth(750, “”));
    }
    #NORMALIZA LA CEBECERA Y REMUEVE LOS PUERTOS EN CASO DE HACE PRUEBAS SOBRE ESOS PUERTOS
    set req.http.Host = regsub(req.http.Host, “:[0-9]+”, “”);
    # Allow purging from ACL
    if (req.method == “PURGE”) {
        # If not allowed then a error 405 is returned
        if (!client.ip ~ purge) {
            return(synth(405, “This IP is not allowed to send PURGE requests.”));
        }
    # If allowed, do a cache_lookup -> vlc_hit() or vlc_miss()
    return (purge);
    }
    # Post requests will not be cached
    if (req.http.Authorization || req.method == “POST”) {
        return (pass);
    }
    # — WordPress specific configuration
    # Did not cache the RSS feed
    if (req.url ~ “/feed”) {
        return (pass);
    }
    # Blitz hack
    if (req.url ~ “/mu-.*”) {
        return (pass);
    }
    # Did not cache the admin and login pages
    if (req.url ~ “/wp-(login|admin)”) {
        return (pass);
    }
    # Do not cache the WooCommerce pages
    ### REMOVE IT IF YOU DO NOT USE WOOCOMMERCE ###
    if (req.url ~ “/(cart|my-account|checkout|addons|/?add-to-cart=)”) {
        return (pass);
    }
    # Remove the “has_js” cookie
    set req.http.Cookie = regsuball(req.http.Cookie, “has_js=[^;]+(; )?”, “”);
    # Remove any Google Analytics based cookies
    set req.http.Cookie = regsuball(req.http.Cookie, “__utm.=[^;]+(; )?”, “”);
    # Remove the Quant Capital cookies (added by some plugin, all __qca)
    set req.http.Cookie = regsuball(req.http.Cookie, “__qc.=[^;]+(; )?”, “”);
    # Remove the wp-settings-1 cookie
    set req.http.Cookie = regsuball(req.http.Cookie, “wp-settings-1=[^;]+(; )?”, “”);
    # Remove the wp-settings-time-1 cookie
    set req.http.Cookie = regsuball(req.http.Cookie, “wp-settings-time-1=[^;]+(; )?”, “”);
    # Remove the wp test cookie
    set req.http.Cookie = regsuball(req.http.Cookie, “wordpress_test_cookie=[^;]+(; )?”, “”);
    # Are there cookies left with only spaces or that are empty?
    if (req.http.cookie ~ “^ *$”) {
        unset req.http.cookie;
    }
    # Cache the following files extensions
    if (req.url ~ “.(css|js|png|gif|jp(e)?g|swf|ico)”) {
        unset req.http.cookie;
    }
    # Normalize Accept-Encoding header and compression
    # https://www.varnish-cache.org/docs/3.0/tutorial/vary.html
    if (req.http.Accept-Encoding) {
        # Do no compress compressed files…
        if (req.url ~ “.(jpg|png|gif|gz|tgz|bz2|tbz|mp3|ogg)$”) {
            unset req.http.Accept-Encoding;
        } elsif (req.http.Accept-Encoding ~ “gzip”) {
            set req.http.Accept-Encoding = “gzip”;
        } elsif (req.http.Accept-Encoding ~ “deflate”) {
            set req.http.Accept-Encoding = “deflate”;
        } else {
            unset req.http.Accept-Encoding;
        }
    }
    # Check the cookies for wordpress-specific items
    if (req.http.Cookie ~ “wordpress_” || req.http.Cookie ~ “comment_”) {
        return (pass);
    }
    if (!req.http.cookie) {
        unset req.http.cookie;
    }
    # — End of WordPress specific configuration
    # Did not cache HTTP authentication and HTTP Cookie
    if (req.http.Authorization || req.http.Cookie) {
        # Not cacheable by default
        return (pass);
    }
    # Cache all others requests
    return (hash);
}

#REDIRECCIONAR DE HTTP A HTTPS
sub vcl_synth {
    if (resp.status == 750) {
        set resp.status = 301;
        set resp.http.Location = “https://www.dominio.com” + req.url;
        return(deliver);
    }
}

sub vcl_pipe {
    return (pipe);
}

sub vcl_pass {
    return (fetch);
}

# The data on which the hashing will take place
sub vcl_hash {
    hash_data(req.url);
    if (req.http.host) {
        hash_data(req.http.host);
    } else {
        hash_data(server.ip);
    }
    # If the client supports compression, keep that in a different cache
    if (req.http.Accept-Encoding) {
        hash_data(req.http.Accept-Encoding);
    }
    if (req.http.X-Forwarded-Proto) {
        hash_data(req.http.X-Forwarded-Proto);
    }
    return (lookup);
}

# This function is used when a request is sent by our backend (Nginx server)
sub vcl_backend_response {
    # Remove some headers we never want to see
    unset beresp.http.Server;
    unset beresp.http.X-Powered-By;
    # For static content strip all backend cookies
    if (bereq.url ~ “.(css|js|png|gif|jp(e?)g)|swf|ico”) {
        unset beresp.http.cookie;
    }
    # # Only allow cookies to be set if we’re in admin area
    # if (beresp.http.Set-Cookie && bereq.url !~ “^/wp-(login|admin)”) {
    #         unset beresp.http.Set-Cookie;
    #     }
    if (!(bereq.url ~ “wp-(login|admin)” || bereq.url ~ “(secret-login)”)) {
        unset beresp.http.set-cookie;
    }
    # don’t cache response to posted requests or those with basic auth
    if ( bereq.method == “POST” || bereq.http.Authorization ) {
        set beresp.uncacheable = true;
        set beresp.ttl = 120s;
        return (deliver);
    }
    # don’t cache search results
    if ( bereq.url ~ “?s=” ){
        set beresp.uncacheable = true;
        set beresp.ttl = 120s;
        return (deliver);
    } 
    # only cache status ok
    if ( beresp.status != 200 ) {
        set beresp.uncacheable = true;
        set beresp.ttl = 120s;
        return (deliver);
    }
    # A TTL of 24h
    set beresp.ttl = 24h;
    # Define the default grace period to serve cached content
    set beresp.grace = 30s;
    return (deliver);
}

# The routine when we deliver the HTTP request to the user
# Last chance to modify headers that are sent to the client
sub vcl_deliver {
    if (obj.hits > 0) {
        set resp.http.X-Cache = “cached”;
    } else {
        set resp.http.x-Cache = “uncached”;
    }
    # Remove some headers: PHP version
    unset resp.http.X-Powered-By;
    # Remove some headers: Apache version & OS
    unset resp.http.Server;
    # Remove some heanders: Varnish
    #unset resp.http.Via;
    #unset resp.http.X-Varnish;
    return (deliver);
}

sub vcl_init {
    return (ok);
}

sub vcl_fini {
    return (ok);
}

sub vcl_miss {
    if (!(req.url ~ “wp-(login|admin)” || req.url ~ “(secret-login)”)) {
        unset req.http.cookie;
    }
}

#CUANDO HAY UN ERROR EN EL SERVIDOR BACKEND MANDA UN MENSAJE DE ERROR Y FORZA ERROR 503
sub vcl_backend_error {
    set beresp.http.Content-Type = “text/html; charset=utf-8”;
    synthetic( {“Error en servidor backend”} );
    set beresp.status = 503;
    return (deliver);
}