feat: 优化图片生成处理，支持直接发送B64数据

src/plugins/doubao_pic/actions/pic_action.py

@@ -145,9 +145,19 @@ class PicAction(PluginAction):
             result = f"图片生成服务遇到意外问题: {str(e)[:100]}"
 
         if success:
+            # 如果返回的是Base64数据（以"iVBORw"等开头），直接使用
+            if result.startswith(("iVBORw", "/9j/", "UklGR", "R0lGOD")):  # 常见图片格式的Base64前缀
+                logger.info(f"{self.log_prefix} 获取到Base64图片数据，直接发送")
+                send_success = await self.send_message(type="image", data=result)
+                if send_success:
+                    await self.send_message_by_expressor("图片表情已发送！")
+                    return True, "图片表情已发送(Base64)"
+                else:
+                    await self.send_message_by_expressor("图片已处理为Base64，但作为表情发送失败了。")
+                    return False, "图片表情发送失败 (Base64)"
+            else:  # 否则认为是URL
                 image_url = result
                 logger.info(f"{self.log_prefix} 图片URL获取成功: {image_url[:70]}... 下载并编码.")
-
                 try:
                     encode_success, encode_result = await asyncio.to_thread(self._download_and_encode_base64, image_url)
                 except Exception as e:
@@ -155,7 +165,6 @@ class PicAction(PluginAction):
                     traceback.print_exc()
                     encode_success = False
                     encode_result = f"图片下载或编码时发生内部错误: {str(e)[:100]}"
-
                 if encode_success:
                     base64_image_string = encode_result
                     send_success = await self.send_message(type="image", data=base64_image_string)
@@ -203,7 +212,7 @@ class PicAction(PluginAction):
         payload_dict = {
             "model": model,
             "prompt": prompt,
-            "response_format": "url",
+            #"response_format": "b64_json",# gpt-image-1 无法使用 url 返回为 “b64_json"，豆包默认返回为 "url"
             "size": size,
             "guidance_scale": guidance_scale,
             "watermark": watermark,
@@ -218,7 +227,7 @@ class PicAction(PluginAction):
             "Content-Type": "application/json",
             "Accept": "application/json",
             "Authorization": f"Bearer {generate_api_key}",
-        }
+        }# gpt 或其他模型密钥要删除‘Bearer ’前缀
 
         logger.info(f"{self.log_prefix} (HTTP) 发起图片请求: {model}, Prompt: {prompt[:30]}... To: {endpoint}")
         logger.debug(
@@ -240,7 +249,19 @@ class PicAction(PluginAction):
 
                 if 200 <= response_status < 300:
                     response_data = json.loads(response_body_str)
+                    # 优先检查Base64数据
+                    if (
+                        isinstance(response_data.get("data"), list)
+                        and response_data["data"]
+                        and isinstance(response_data["data"][0], dict)
+                        and "b64_json" in response_data["data"][0]
+                    ):
+                        b64_data = response_data["data"][0]["b64_json"]
+                        logger.info(f"{self.log_prefix} (HTTP) 获取到Base64图片数据，长度: {len(b64_data)}")
+                        return True, b64_data  # 直接返回Base64字符串
+                    else:
                         image_url = None
+
                         if (
                             isinstance(response_data.get("data"), list)
                             and response_data["data"]
@@ -249,7 +270,6 @@ class PicAction(PluginAction):
                             image_url = response_data["data"][0].get("url")
                         elif response_data.get("url"):
                             image_url = response_data.get("url")
-
                         if image_url:
                             logger.info(f"{self.log_prefix} (HTTP) 图片生成成功，URL: {image_url[:70]}...")
                             return True, image_url