74 lines
2.1 KiB
Go
74 lines
2.1 KiB
Go
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package middleware
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import (
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"log"
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"net/http"
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"strings"
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"github.com/volcano-tts/tts-api/common"
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"github.com/volcano-tts/tts-api/setting"
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)
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// RequireAdmin 是 /admin 路由的鉴权中间件,复用 OPENAI_TTS_API_KEY。
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// 行为:
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// - Auth.APIKeys 为空 → 所有请求放行(等同无鉴权)
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// - Authorization 头 Bearer token 在列表中 → 放行
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// - 其它 → 401 + JSON {error: 'unauthorized', code: 'admin_auth_failed'}
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//
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// 设计: 与现有 /v1/audio/speech 用的 setting.Auth 共享同一份 keys,
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// 用户只用管一个 env 变量(OPENAI_TTS_API_KEY)。
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func RequireAdmin(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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// 预检: 跨域/OPTIONS 直接放行(让浏览器能发 preflight)
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if r.Method == http.MethodOptions {
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next.ServeHTTP(w, r)
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return
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}
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keys := setting.Auth.APIKeys
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if len(keys) == 0 {
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// 没配 admin key,等同无鉴权
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next.ServeHTTP(w, r)
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return
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}
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auth := r.Header.Get("Authorization")
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const prefix = "Bearer "
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if !strings.HasPrefix(auth, prefix) {
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denyAdmin(w, r)
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return
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}
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token := strings.TrimSpace(auth[len(prefix):])
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if !inAPIKeyList(token, keys) {
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denyAdmin(w, r)
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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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// inAPIKeyList 用常量时间比较,防 token 计时攻击。
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// 单个 key 也走同一条路径,无差别处理。
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func inAPIKeyList(token string, keys []string) bool {
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if token == "" {
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return false
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}
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match := false
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for _, k := range keys {
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if common.SecureEqualString(token, k) {
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match = true
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// 不 break,继续遍历,保持时间恒定
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}
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}
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return match
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}
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// denyAdmin 写 401 + JSON 错误体,记录客户端 IP。
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func denyAdmin(w http.ResponseWriter, r *http.Request) {
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log.Printf("[admin_auth] 鉴权失败 - 路径=%s 客户端=%s", r.URL.Path, GetClientIP(r))
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w.Header().Set("Content-Type", "application/json; charset=utf-8")
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w.Header().Set("WWW-Authenticate", `Bearer realm="tts-admin"`)
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w.WriteHeader(http.StatusUnauthorized)
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_, _ = w.Write([]byte(`{"error":{"code":"admin_auth_failed","message":"unauthorized","type":"authentication_error"}}`))
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}
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