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danackerson/100_base.conf

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  1. danackerson revised this gist Nov 6, 2014. 2 changed files with 1 addition and 1 deletion.
    2 changes: 1 addition & 1 deletion 100_base.conf
    View file
    Original file line number Diff line number Diff line change
    @@ -12,7 +12,7 @@ http {
    server_name www.stylight.com;

    location / {
    include /etc/nginx/include.d/en_US/rewrites/122_lua_st_redis_rewrites.conf;
    include /etc/nginx/include.d/en_US/rewrites/122_lua_st_redis_rewrites.lua;
    }
    }
    }
    0 122_lua_st_redis_rewrites.conf → 122_lua_st_redis_rewrites.lua
    View file
    File renamed without changes.
  2. danackerson renamed this gist Nov 6, 2014. 1 changed file with 0 additions and 0 deletions.
    0 base.conf → 100_base.conf
    View file
    File renamed without changes.
  3. danackerson created this gist Nov 6, 2014.
    80 changes: 80 additions & 0 deletions 122_lua_st_redis_rewrites.conf
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    Original file line number Diff line number Diff line change
    @@ -0,0 +1,80 @@
    access_by_lua '
    local redis = require "redis"
    local red = redis:new()
    -- see all available redis: methods @ https://github.com/openresty/lua-resty-redis#methods
    local ok, err = red:connect("127.0.0.1", 6379)
    if not ok then
    ngx.log(ngx.ERR, "failed to connect to redis: ", err)
    return ngx.exit(500)
    end
    red:select(1)
    local redirect_candidate = ngx.var.uri
    local args_remainder = ngx.null
    local args = ngx.var.args

    -- we store internal application rewrites as hash values in Redis for their corresponding pretty URL keys
    -- if a bot crawls through asking for /search.action?brand=3210
    local hash_rewrite, error = red:hgetall(ngx.var.uri)
    -- 127.0.0.1:6379[1]> hgetall /search.action?brand=3210
    -- (error) WRONGTYPE Operation against a key holding the wrong kind of value
    -- let's find the appropriate redirect URL:
    if error then
    if args then
    local m = ngx.re.match(args, [[^(gclid=.*)?(?<start>.*(shop|brand|tag)=[0-9]+)+&?(.*(shop|sale|searchstring|gender)=.*?&?)*(|&(?<remainder>.*))$]])
    if m then
    if m["start"] then
    redirect_candidate = redirect_candidate .. "?" .. m["start"]
    end
    if m["remainder"] then
    args_remainder = m["remainder"]
    end
    end
    end

    -- and ask Redis for the 301 redirect URL
    local rewrite_value, err = red:get(redirect_candidate)
    -- 127.0.0.1:6379[1]> get "/search.action?brand=3210"
    -- "/Mexx/"

    -- create/use a connection pool of size 100 with 0 idle timeout
    red:set_keepalive(0, 100)
    if rewrite_value ~= ngx.null then
    if args_remainder ~= ngx.null then
    rewrite_value = rewrite_value .. "?" .. args_remainder
    end
    -- and kindly ask the bot to visit /Mexx/ instead
    ngx.redirect(rewrite_value, 301);
    end
    else
    -- a request for /Sandals/Women/ however
    if table.getn(hash_rewrite) > 0 then
    red:set_keepalive(0, 100)

    -- gives us the following hash from Redis:
    -- 127.0.0.1:6379[3]> hgetall /Sandals/Women/
    -- 1) "action"
    -- 2) "search.action"
    -- 3) "params"
    -- 4) "gender=women&tag=10580&tag=10630"

    -- lets transform to an internal rewrite
    arr_rewrite = red:array_to_hash(hash_rewrite)
    params = nil
    if arr_rewrite["params"] then
    params = arr_rewrite["params"]
    end
    if args then
    if params~=nil then
    params = params .. "&" .. args
    else
    params = args
    end
    end
    if params~=nil then
    ngx.req.set_uri_args(params)
    end
    -- and send off to our app server for processing
    ngx.req.set_uri("/" .. arr_rewrite["action"])
    end
    end
    ';
    18 changes: 18 additions & 0 deletions base.conf
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    Original file line number Diff line number Diff line change
    @@ -0,0 +1,18 @@
    # using such a setup requires `apt-get install lua-nginx-redis` under Ubuntu Trusty
    # more info @ http://wiki.nginx.org/HttpLuaModule#access_by_lua

    http {
    lua_package_path "/etc/nginx/include.d/?.lua;;";
    lua_socket_pool_size 100;
    lua_socket_connect_timeout 10ms;
    lua_socket_read_timeout 10ms;

    server {
    listen 80;
    server_name www.stylight.com;

    location / {
    include /etc/nginx/include.d/en_US/rewrites/122_lua_st_redis_rewrites.conf;
    }
    }
    }