wangjia
7e7381b209
withCORS 中间件:仅白名单 origin(默认 pangolin.yanmeiai.com + pages.dev)返回 CORS 头、 OPTIONS 直接 204;New(svc, corsOrigins) + main 读 PAY_CORS_ORIGINS。为官网下单页跨域调 pay 铺路。 Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
41 lines
1.2 KiB
Go
41 lines
1.2 KiB
Go
package httpapi
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import (
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"net/http"
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"strings"
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)
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// withCORS lets the browser storefront (pangolin website) call the order API
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// cross-origin. Auth is server-to-server / bearer-less here (no cookies), so
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// Allow-Credentials is not needed. Only whitelisted origins get CORS headers;
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// OPTIONS preflight is answered directly.
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func withCORS(next http.Handler, allowed map[string]bool) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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origin := r.Header.Get("Origin")
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if origin != "" && allowed[origin] {
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h := w.Header()
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h.Set("Access-Control-Allow-Origin", origin)
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h.Add("Vary", "Origin")
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h.Set("Access-Control-Allow-Methods", "GET, POST, OPTIONS")
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h.Set("Access-Control-Allow-Headers", "Content-Type")
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h.Set("Access-Control-Max-Age", "600")
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}
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if r.Method == http.MethodOptions {
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w.WriteHeader(http.StatusNoContent)
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return
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}
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next.ServeHTTP(w, r)
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})
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}
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// parseOrigins builds the allowed-origin set from a comma-separated list.
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func parseOrigins(csv string) map[string]bool {
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m := map[string]bool{}
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for _, o := range strings.Split(csv, ",") {
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if o = strings.TrimSpace(o); o != "" {
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m[o] = true
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}
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}
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return m
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}
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