cgi db 数据库 html 嵌入式cgi代码、数据库cpp代码 使用cgi代码的时候，出现 “400 Bad Request Your client has issued a malformed or illegal request. ”或者“502 Bad Gateway The CGI was not CGI/1.1 compliant.”错误，报错“Invalid Content-Length [0] on POS”等，使用cgi返回的json做前后端分离，如果点击某button之