capture headers via lua nginx-CodePudding

I want to capture only some headers which contains word "foo". I used for it lua nginx module My code

    location /lua_test {

        content_by_lua_block {
            local h = ngx.req.get_headers()
            for k, v in pairs(h) do
                if k == k:match("([%w].Foo.*):(. )") then
                    ngx.header[k] = v
                end
            end
            ngx.say('headers with Foo are captured');
        }

    }

But unfortunately it doesn't work. Sorry, I'm newbie to Lua and nginx. Thanks for any help

CodePudding user response：

may be need to look in the values:

        local h = ngx.req.get_headers()
        for k, v in pairs(h) do
            if v:find("foo") then -- equivalent v:match("foo") 
                ngx.header[k] = v
            end
        end

or do you have your own keys: if k:find("foo") then