Update app.py

app.py

@@ -11,13 +11,12 @@ from oss2.credentials import EnvironmentVariableCredentialsProvider,StaticCreden
 
 # 下载网络图片
 def download_image(url):
-    # 通过 URL 下载图片
-    response = requests.get(url)
-    if response.status_code == 200:
+    try:
+        response = requests.get(url, timeout=10)  # 添加超时处理，避免长时间等待
+        response.raise_for_status()  # 如果状态码不是200，抛出HTTPError
         return Image.open(BytesIO(response.content))
-    else:
-        raise Exception(f"Failed to download image, status code: {response.status_code}")
-
+    except requests.exceptions.RequestException as e:
+        raise RuntimeError(f"图片下载失败: {e}")
 
 def remove_metadata(image, output_path=None):
     # 获取图片的格式
@@ -47,48 +46,21 @@ def upload_to_oss(file_path, object_name, bucket_name, access_key_id, access_key
         return None
 
 def compress_image(image, output_path, quality=85):
-    """
-    根据图片格式自动选择压缩方法并压缩图片，保留元数据。
-    
-    :param image: PIL Image 对象
-    :param output_path: 输出压缩后的图片文件路径
-    :param quality: 对于有损压缩的图片格式（JPEG, WebP）设置压缩质量，范围 1-100
-    """
-    # 获取图片的实际格式
     img_format = image.format.lower()
 
-
-    if img_format == 'jpeg':
-        # 压缩 JPEG，同时保留 EXIF 数据（如果有）
-        image.save(output_path, "JPEG", quality=quality)
-        print(f"Compressed JPEG with quality={quality}, EXIF data preserved.")
-    
+    if img_format in ['jpeg', 'webp']:
+        image.save(output_path, img_format.upper(), quality=quality)
     elif img_format == 'png':
-        # 压缩 PNG，optimize=True 启用无损压缩
-        image.save(output_path, "PNG", optimize=True)
-        print("Compressed PNG with lossless compression")
-    
+        image.save(output_path, 'PNG', optimize=True)
     elif img_format == 'gif':
-        # 压缩 GIF，使用调色板模式减少颜色
         image = image.convert("P", palette=Image.ADAPTIVE)
         image.save(output_path, optimize=True)
-        print("Compressed GIF with optimized color palette")
-    
     elif img_format == 'tiff':
-        # 压缩 TIFF，使用 tiff_deflate 进行无损压缩
-        image.save(output_path, "TIFF", compression="tiff_deflate")
-        print("Compressed TIFF using deflate compression")
-    
-    elif img_format == 'webp':
-        # WebP 有损压缩
-        image.save(output_path, "WEBP", quality=quality)
-        print(f"Compressed WebP with quality={quality}")
-    
+        image.save(output_path, 'TIFF', compression='tiff_deflate')
     else:
-        raise Exception(f"Unsupported image format: {img_format}")
-        return
-    
-    print(f"Image saved to {output_path}")
+        raise Exception(f"不支持的图片格式: {img_format}")
+
+    return output_path
     
 # 删除本地文件
 def delete_local_file(file_path):