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我已经创建了旅行服务器。它工作正常,我们可以POST通过 Insomnia但是当我们发出请求时,POST通过过前端axios当发出请求时,它会发送一个错误:* d0 a- E! |1 b1 I- D
has been blocked by CORS policy: Response to preflight request doesn’t pass access control check: It does not have HTTP ok status.- ~$ l3 R @0 N8 \' M5 N" g
我们对 axios 的要求:# g, w' g/ Q* y+ [: P
let config = {headers: { "Content-Type": "application/json", 'Access-Control-Allow-Origin': '*', }}let data = { "id": 4 } axios.post('http://196.121.147.69:9777/twirp/route.FRoute/GetLists',data,config) .then((res) => { console.log(res) .catch((err) => { console.log(err) });} 5 {; x# |3 X/ y* L& \9 E
我的去文件:9 Y x$ e6 e+ x t+ v/ F/ N6 n, p- G2 Z
func setupResponse(w *http.ResponseWriter,req *http.Request) (*w).Header().Set("Access-Control-Allow-Origin","*") (*w).Header().Set("Access-Control-Allow-Methods"," OST,GET,OPTIONS,PUT,DELETE") (*w).Header().Set("Access-Control-Allow-Headers","Accept,Content-Type,Content-Length,Accept-Encoding,X-CSRF-Token,Authorization")}func WithUserAgent(base http.Handler) http.Handler return http.HandlerFunc(func(w http.ResponseWriter,r *http.Request) ctx := r.Context() ua := r.Header.Get("Jwt") ctx = context.WithValue(ctx,"jwt",ua) r = r.WithContext(ctx) setupResponse(&w,r) base.ServeHTTP(w,r) })}const host = "localhost" port = 5432 user = "postgres" password = "postgres" dbname = "postgres")func main() psqlInfo := fmt.Sprintf("host=%s port=%d user=%s " "password=%s dbname=%s sslmode=disable", host,port,user,password,dbname) server := &s.Server{psqlInfo} twirpHandler := p.NewFinanceServiceServer(server,nil) wrap := WithUserAgent(twirpHandler) log.Fatalln(http.ListenAndServe(":9707",wrap))}0 L( D8 x) y0 k8 d
就像我以前在 一样Insomnia 上面说的,它工作得很好,但当我们发出 axiosPOST请求时,在浏览器的控制台上会出现以下内容:- u; \9 O: r: ~) {
已被 CORS 策略阻止:对预检请求的响应未通过访问控制检查:无 HTTP ok 状态。& }0 N0 K: ~$ [$ ?% I
- u8 m# ~1 h6 k2 M7 P 解决方案:
2 p | ]5 N, M! _( e 我相信这是最简单的例子: ]5 Y/ a* j2 @) n! @2 E; s
header := w.Header()header.Add("Access-Control-Allow-Origin","*")header.Add("Access-Control-Allow-Methods","DELETE,POST,GET,OPTIONS")header.Add("Access-Control-Allow-Headers","Content-Type,Access-Control-Allow-Headers,Authorization,X-Requested-With")
' J8 M4 u$ X/ U5 [% V: l& L; M 您还可以添加标题Access-Control-Max-Age,当然,你可以允许任何你想要的标题和方法。; ]% s. j3 ?/ q: m9 a4 U
最后,您应响应初始请求:
7 |1 V' O( N" Oif r.Method == "OPTIONS" w.WriteHeader(http.StatusOK) return}
. D3 q) A. Z4 O 编辑(2019年 6 月):我们现在为此使用gorilla。他们的东西得到了更积极的维护,他们已经这样做了很长时间。把链接留给旧的,以防万一。
! b3 k% \3 U7 i' G" ^5 A以下旧中间件建议: 当然,使用中间件可能更容易。我不认为我用过,但这次似乎强烈推荐。 |
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