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

backend/internal/pkg/apicompat/response_format.go

@@ -0,0 +1,92 @@
+package apicompat
+
+import "encoding/json"
+
+func chatResponseFormatToResponsesTextFormat(raw json.RawMessage) json.RawMessage {
+	raw = normalizedRawJSON(raw)
+	if len(raw) == 0 {
+		return nil
+	}
+
+	obj, ok := rawJSONObject(raw)
+	if !ok || rawString(obj["type"]) != "json_schema" {
+		return raw
+	}
+
+	schemaRaw := normalizedRawJSON(obj["json_schema"])
+	if len(schemaRaw) == 0 {
+		return raw
+	}
+
+	var schema map[string]json.RawMessage
+	if err := json.Unmarshal(schemaRaw, &schema); err != nil {
+		return raw
+	}
+	schema["type"] = rawJSONString("json_schema")
+
+	out, err := json.Marshal(schema)
+	if err != nil {
+		return raw
+	}
+	return out
+}
+
+func responsesTextFormatToChatResponseFormat(raw json.RawMessage) json.RawMessage {
+	raw = normalizedRawJSON(raw)
+	if len(raw) == 0 {
+		return nil
+	}
+
+	obj, ok := rawJSONObject(raw)
+	if !ok || rawString(obj["type"]) != "json_schema" {
+		return raw
+	}
+	if _, alreadyChatShape := obj["json_schema"]; alreadyChatShape {
+		return raw
+	}
+
+	schema := make(map[string]json.RawMessage, len(obj))
+	for key, value := range obj {
+		if key == "type" {
+			continue
+		}
+		schema[key] = value
+	}
+	if len(schema) == 0 {
+		return raw
+	}
+
+	schemaRaw, err := json.Marshal(schema)
+	if err != nil {
+		return raw
+	}
+	out, err := json.Marshal(map[string]json.RawMessage{
+		"type":        rawJSONString("json_schema"),
+		"json_schema": schemaRaw,
+	})
+	if err != nil {
+		return raw
+	}
+	return out
+}
+
+func normalizedRawJSON(raw json.RawMessage) json.RawMessage {
+	raw = bytesTrimSpace(raw)
+	if len(raw) == 0 || string(raw) == "null" {
+		return nil
+	}
+	return append(json.RawMessage(nil), raw...)
+}
+
+func rawJSONObject(raw json.RawMessage) (map[string]json.RawMessage, bool) {
+	var obj map[string]json.RawMessage
+	if err := json.Unmarshal(raw, &obj); err != nil {
+		return nil, false
+	}
+	return obj, true
+}
+
+func rawJSONString(value string) json.RawMessage {
+	data, _ := json.Marshal(value)
+	return data
+}