/**
 * REST API中间件
 */
module.exports = async (ctx, next) => {
    // 前缀判断
    if (ctx.request.path.startsWith('/api/')) {
        ctx.json = (data = {}, code = 0, msg = 'ok') => {
            ctx.response.type = 'application/json; charset=utf-8';
            ctx.response.body = { code, msg, data };
        };
        ctx.restError = (msg = '', code = -1, status = 400) => {
            code = code || 'internal:unknown_error';
            ctx.response.status = status;
            ctx.response.type = 'application/json; charset=utf-8';
            ctx.response.body = { code, msg };
        };
    }
    await next();
};