env_get

env_get(key) retrieves a read-only environment variable from the host system. Automatically prepends the SPYWEB_ prefix for security, allowing you to store secrets outside config files.

Signature

env_get(key)

sync

Note

To access a variable in Lua, you must prefix it with SPYWEB_ on your host system:

export SPYWEB_API_KEY="secret-123"

Then in Lua, call env_get("API_KEY").

Parameters

Param	Type	Description
key	string	Environment variable name (without SPYWEB_ prefix)

Returns

Value	Type	Description
value	string / nil	Environment variable value, or nil if not set

Example

function before_fetch(request, ctx)
    local api_key = env_get("API_KEY") -- Reads SPYWEB_API_KEY
    if api_key then
        request.headers["Authorization"] = "Bearer " .. api_key
    end
    return request
end

See Also

• before_fetch - Modify request before fetching