1.Access-Control-Allow-Origin 指定格式


The Origin header field has the following syntax:  origin              = "Origin:" OWS origin-list-or-null OWS origin-list-or-null = %x6E %x75 %x6C %x6C / origin-list origin-list         = serialized-origin *( SP serialized-origin ) serialized-origin   = scheme "://" host [ ":" port ]                    ; <scheme>, <host>, <port> from RFC 3986


origin              = "Origin:" OWS origin-list-or-null OWS origin-list-or-null = %x6E %x75 %x6C %x6C / origin-list origin-list         = serialized-origin *( SP serialized-origin ) serialized-origin   = scheme "://" host [ ":" port ]