操作系统错误：尝试重用下载的标头时无法识别图像文件<_io.BytesIO object at 0x02F41960>

Question

Image.open 最后失败：

文件“C:\Program Files (x86)\Python36-32\lib\site-packages\PIL\Image.py”，第 2349 行，打开 %（文件名，如果文件名，否则fp））

OSError：无法识别图像文件

<_io.BytesIO object at 0x02F41960>

我发现

Pillow 的发行说明 2.8.0

这似乎表明我可以使用 Image.open(requests.raw)。我猜想在确保使用seek(0)重置它之后我应该能够重用已经下载的标头。 此错误的其他答案似乎涉及将图像缓冲区保存到实际文件中，

我试图避免

（只是重用从response.raw下载的字节进行我的所有测试/检查，而不是发出多个下载请求到任何服务器。） 请问我哪里错了？

这是我的示例代码：

import requests
from PIL import Image
import imghdr
import io

if __name__ == '__main__':
    url = "https://ichef-1.bbci.co.uk/news/660/cpsprodpb/37B5/production/_89716241_thinkstockphotos-523060154.jpg"
    try:
        response = requests.get(url, stream=True)
        if response.status_code == 200:
            response.raw.decode_content = True

            # Grab first 100 bytes as potential image header
            header = response.raw.read(100)
            ext = imghdr.what(None, h=header)
            print("Found: " + ext)
            if ext != None:     # Proceed to other tests if we received an image at all
                header = io.BytesIO(header)
                header.seek(0)
                im = Image.open(header)
                im.verify()

                # other image-related tasks here
        else:
            print("Received error " + str(response.status.code))
    except requests.ConnectionError as e:
        print(e)

Answer 1

Image.open()

之前获取其余的图像数据。

这就是我的意思：

import requests
from PIL import Image
import imghdr
import io

if __name__ == '__main__':
    url = "https://ichef-1.bbci.co.uk/news/660/cpsprodpb/37B5/production/_89716241_thinkstockphotos-523060154.jpg"
    try:
        response = requests.get(url, stream=True)
        if response.status_code == 200:
            response.raw.decode_content = True

            # Grab first 100 bytes as potential image header
            header = response.raw.read(100)
            ext = imghdr.what(None, h=header)
            print("Found: " + ext)
            if ext != None:     # Proceed to other tests if we received an image at all
                data = header + response.raw.read()  # GET THE REST OF THE FILE
                data = io.BytesIO(data)
                im = Image.open(data)
                im.verify()

                # other image-related tasks here
        else:
            print("Received error " + str(response.status.code))
    except requests.ConnectionError as e:
        print(e)