Sub2API v1.0 - AI API 网关（二开初始版本，基于上游 Wei-Shaw/sub2api）

backend/internal/service/anthropic_apikey_auth.go

@@ -0,0 +1,42 @@
+package service
+
+import (
+	"net/http"
+	"strings"
+)
+
+const (
+	anthropicAPIKeyAuthSchemeExtraKey = "anthropic_apikey_auth_scheme"
+
+	AnthropicAPIKeyAuthSchemeXAPIKey             = "x_api_key"
+	AnthropicAPIKeyAuthSchemeAuthorizationBearer = "authorization_bearer"
+)
+
+// GetAnthropicAPIKeyAuthScheme returns the upstream authentication scheme for
+// Anthropic API-key accounts. Missing or invalid values keep the historical
+// x-api-key behavior. CN providers using their native Anthropic endpoints
+// (api_protocol=anthropic) share the same override knob — Kimi/DeepSeek default
+// to x-api-key, Zhipu can opt into Authorization: Bearer.
+func (a *Account) GetAnthropicAPIKeyAuthScheme() string {
+	if a == nil || a.Type != AccountTypeAPIKey {
+		return AnthropicAPIKeyAuthSchemeXAPIKey
+	}
+	if a.Platform != PlatformAnthropic && !a.IsCNProvider() {
+		return AnthropicAPIKeyAuthSchemeXAPIKey
+	}
+
+	switch strings.TrimSpace(a.GetExtraString(anthropicAPIKeyAuthSchemeExtraKey)) {
+	case AnthropicAPIKeyAuthSchemeAuthorizationBearer:
+		return AnthropicAPIKeyAuthSchemeAuthorizationBearer
+	default:
+		return AnthropicAPIKeyAuthSchemeXAPIKey
+	}
+}
+
+func setAnthropicAPIKeyAuthHeader(header http.Header, account *Account, token string) {
+	if account.GetAnthropicAPIKeyAuthScheme() == AnthropicAPIKeyAuthSchemeAuthorizationBearer {
+		header.Set("Authorization", "Bearer "+token)
+		return
+	}
+	header.Set("x-api-key", token)
+}