自定义插件在check_schema阶段处理完数据后，在access阶段使用会不会有什么问题？

[Horus-K]

local ngx = ngx
local core = require("apisix.core")

local schema = {
    type = "object",
    properties = {
        body = {
            description = "body for response must base64",
            type = "string",
        }
    },
    required = {"body"},
}

local plugin_name = "return-dom"

local _M = {
    version = 0.1,
    priority = -6000,
    name = plugin_name,
    schema = schema,
}


function _M.check_schema(conf, schema_type)
    core.log.warn("loading dom", core.json.delay_encode(conf))
    conf.ret_body = ngx.decode_base64(conf.body)
    return core.schema.check(schema, conf)
end


function _M.access(conf, ctx)
    core.response.set_header("Content-Type", "text/html")
    return 200, conf.ret_body
end

return _M

我只能使用conf来传递处理好的数据，修改了conf会有什么影响么
conf.ret_body = ngx.decode_base64(conf.body)

[tzssangglass]

我只能使用conf来传递处理好的数据，修改了conf会有什么影响么

Modifying conf is not recommended; in fact, we plan to make conf unmodifiable.

We can store something via lrucache.

[soulbird]

It is a good choice to use lrucache to cache the value of ngx. decode_base64 in the early access phase. No need to pass value.

local lrucache = core.lrucache.new({
    type = "plugin"
})
function _M.access(conf, ctx)
    core.response.set_header("Content-Type", "text/html")
    local body = lrucache(plugin_name, conf, ngx.decode_base64, conf.body)
    return 200, body
end

[Horus-K]

If I use lrucache heavily (5kb*600), then do I need to modify lrucache-lock: 10m config?

[tzssangglass]

yes