const path=require('path');
const mime=require('mime');
const fs=require('mz/fs');
var staticFiles=(...rest)=>{
    return async (ctx,next)=>{
        let rpath=ctx.path;
        let url=rpath.startsWith(rest[0])?rest[0]:rpath.startsWith(rest[1])?rest[1]:'';
        if(url){
            //let fp=path.join(dir,rpath.substring(url.length));
            let fp=__dirname+url+rpath.substring(url.length);
            if(await fs.exists(fp)){
                ctx.type=mime.getType(rpath);
                ctx.body=await fs.readFile(fp);    
            }else{
                ctx.response.status=404;    
            }
        }else{
            await next();    
        }
    };
}
module.exports=staticFiles;