当客户端想要下载文件时,nodejs服务端如何根据URL设置响应头的Content-Type类型
tml", ".hts": "text/html", ".htt": "text/webviewhtml", ".ice": "x-conference/x-cooltalk", ".ico": "image/x-icon", ".ief": "image/ief", ".ifm": "image/gif", ".ifs": "image/ifs", ".iii": "application/x-iphone", ".imy": "audio/melody", ".ins": "application/x-internet-sign