Golang 的一些问题

跨域问题

Access to fetch at 'https://api.example1.com' from origin 'http://example2.com' has been blocked by CORS policy: The 'Access-Control-Allow-Origin' header contains multiple values '*, *', but only one is allowed. Have the server send the header with a valid value, or, if an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled.

# https://stackoverflow.com/questions/39507065/enable-cors-in-golang

func GetPeopleAPI(w http.ResponseWriter, r *http.Request) {

    //Allow CORS here By * or specific origin
    w.Header().Set("Access-Control-Allow-Origin","*")

    w.Header().Set("Access-Control-Allow-Headers","Content-Type")
    // return"OKOK"
    json.NewEncoder(w).Encode("OKOK")
}

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