fix: 优化发送图片逻辑

skills/image-to-image/scripts/image_to_image.py

@@ -281,12 +281,55 @@ def _rewrite_openai_image_url(url: str) -> str:
     return url
 
 
-def _openai_images_from_response(response) -> list[str]:
+def _extension_from_output_format(output_format: str) -> str:
+    if output_format == "jpeg":
+        return ".jpg"
+    if output_format == "webp":
+        return ".webp"
+    return ".png"
+
+
+def _openai_response_value(item, key: str):
+    if isinstance(item, dict):
+        return item.get(key)
+    return getattr(item, key, None)
+
+
+def _write_openai_b64_image(b64_json: str, output_format: str) -> str:
+    encoded = b64_json.strip()
+    suffix = _extension_from_output_format(output_format)
+    if encoded.startswith("data:"):
+        header, encoded = encoded.split(",", 1)
+        mime_type = header[5:].split(";", 1)[0].strip().lower()
+        if mime_type:
+            suffix = _extension_from_mime(mime_type)
+
+    encoded = "".join(encoded.split())
+    padding = len(encoded) % 4
+    if padding:
+        encoded = f"{encoded}{'=' * (4 - padding)}"
+
+    image_bytes = base64.b64decode(encoded)
+    with tempfile.NamedTemporaryFile(prefix="wechat-openai-image-", suffix=suffix, delete=False) as temp_file:
+        temp_file.write(image_bytes)
+        return temp_file.name
+
+
+def _openai_images_from_response(response, output_format: str) -> list[str]:
     outputs: list[str] = []
+    try:
         for item in getattr(response, "data", []) or []:
-        url = getattr(item, "url", None)
+            b64_json = _openai_response_value(item, "b64_json")
+            if b64_json:
+                outputs.append(_write_openai_b64_image(str(b64_json), output_format))
+                continue
+
+            url = _openai_response_value(item, "url")
             if url:
                 outputs.append(_rewrite_openai_image_url(str(url)))
+    except Exception:
+        _cleanup_openai_temp_files(outputs)
+        raise
     return outputs
 
 
@@ -541,7 +584,7 @@ def call_openai(config: dict, prompt: str, model: str, images: list[str],
                 input_file.close()
 
     _debug_response("openai images.edit response", response)
-    return _openai_images_from_response(response)
+    return _openai_images_from_response(response, output_format)
 
 
 # ---------------------------------------------------------------------------

skills/text-to-image/scripts/text_to_image.py

@@ -3,11 +3,14 @@
 from __future__ import annotations
 
 import argparse
+import base64
 import json
+import mimetypes
 import os
 import re
 import subprocess
 import sys
+import tempfile
 import time
 import traceback
 import urllib.parse
@@ -280,12 +283,64 @@ def _rewrite_openai_image_url(url: str) -> str:
     return url
 
 
-def _openai_images_from_response(response) -> list[str]:
+def _extension_from_mime(mime_type: str) -> str:
+    if mime_type == "image/jpeg":
+        return ".jpg"
+    guessed = mimetypes.guess_extension(mime_type)
+    if guessed in {".png", ".jpg", ".jpeg", ".webp"}:
+        return guessed
+    return ".png"
+
+
+def _extension_from_output_format(output_format: str) -> str:
+    if output_format == "jpeg":
+        return ".jpg"
+    if output_format == "webp":
+        return ".webp"
+    return ".png"
+
+
+def _openai_response_value(item, key: str):
+    if isinstance(item, dict):
+        return item.get(key)
+    return getattr(item, key, None)
+
+
+def _write_openai_b64_image(b64_json: str, output_format: str) -> str:
+    encoded = b64_json.strip()
+    suffix = _extension_from_output_format(output_format)
+    if encoded.startswith("data:"):
+        header, encoded = encoded.split(",", 1)
+        mime_type = header[5:].split(";", 1)[0].strip().lower()
+        if mime_type:
+            suffix = _extension_from_mime(mime_type)
+
+    encoded = "".join(encoded.split())
+    padding = len(encoded) % 4
+    if padding:
+        encoded = f"{encoded}{'=' * (4 - padding)}"
+
+    image_bytes = base64.b64decode(encoded)
+    with tempfile.NamedTemporaryFile(prefix="wechat-openai-image-", suffix=suffix, delete=False) as temp_file:
+        temp_file.write(image_bytes)
+        return temp_file.name
+
+
+def _openai_images_from_response(response, output_format: str) -> list[str]:
     outputs: list[str] = []
+    try:
         for item in getattr(response, "data", []) or []:
-        url = getattr(item, "url", None)
+            b64_json = _openai_response_value(item, "b64_json")
+            if b64_json:
+                outputs.append(_write_openai_b64_image(str(b64_json), output_format))
+                continue
+
+            url = _openai_response_value(item, "url")
             if url:
                 outputs.append(_rewrite_openai_image_url(str(url)))
+    except Exception:
+        _cleanup_openai_temp_files(outputs)
+        raise
     return outputs
 
 
@@ -498,7 +553,7 @@ def call_openai(config: dict, prompt: str, model: str,
 
     response = client.images.generate(**kwargs)
     _debug_response("openai images.generate response", response)
-    return _openai_images_from_response(response)
+    return _openai_images_from_response(response, output_format)
 
 
 # ---------------------------------------------------------------------------