# nginx.conf:

    lua_package_path "/path/to/lua-resty-zip/lib/?.lua;;";

    server {
        location = /test {
            content_by_lua_block {
                local zip = require "resty.zip"

                local txt = string.rep("abcd", 1000)
                ngx.say("Uncompressed size: ", #txt)

                local c = zip.compress(txt, 1)
                ngx.say("Compressed size on level 1: ", #c)

                local c = zip.compress(txt, 9)
                ngx.say("Compressed size on level 9: ", #c)

                local txt2 = zip.uncompress(c, #txt)
                assert(txt2 == txt)
            }
        }
    }