保存base64图像python

Question

我正在尝试使用 Base64 编码的 python 保存图像。这里的字符串太大无法发布，但这里是图像

当 python 接收到最后 2 个字符时，==虽然字符串没有格式化，所以我这样做

import base64
data = "data:image/png;base64," + photo_base64.replace(" ", "+")

然后我这样做

imgdata = base64.b64decode(data)
    filename = 'some_image.jpg'  # I assume you have a way of picking unique filenames
    with open(filename, 'wb') as f:
            f.write(imgdata)

但这会导致此错误

Traceback (most recent call last):
  File "/var/www/cgi-bin/save_info.py", line 83, in <module>
    imgdata = base64.b64decode(data)
  File "/usr/lib64/python2.7/base64.py", line 76, in b64decode
    raise TypeError(msg)
TypeError: Incorrect padding

我还打印出字符串的长度，一旦data:image/png;base64,添加和spaces替换，+它的长度34354为损坏的。

发生了什么，为什么文件损坏？

谢谢

编辑

这是一些也失败的 base64

iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAMAAAAoLQ9TAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAADBQTFRFA6b1q Ci5/f2lt/9yu3 Y8v2cMpb1/DSJbz5i9R2NLwfLrWbw m T8I8////////SvMAbAAAABB0Uk5T////////////////////AOAjXRkAAACYSURBVHjaLI8JDgMgCAQ5BVG3//9t0XYTE2Y5BPq0IGpwtxtTP4G5IFNMnmEKuCopPKUN8VTNpEylNgmCxjZa2c1kafpHSvMkX6sWe7PTkwRX1dY7gdyMRHZdZ98CF6NZT2ecMVaL9tmzTtMYcwbP y3XeTgZkF5s1OSHwRzo1fkILgWC5R0X4BHYu7t/136wO71DbvwVYADUkQegpokSjwAAAABJRU5ErkJggg==

这是我从 POST 请求在我的 python 脚本中收到的内容

注意我没有用 + 替换空格

Answer 1

data:image/png;base64,之前不需要添加，我尝试使用下面的代码，它工作正常。

import base64
data = 'iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAMAAAAoLQ9TAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAADBQTFRFA6b1q Ci5/f2lt/9yu3 Y8v2cMpb1/DSJbz5i9R2NLwfLrWbw m T8I8////////SvMAbAAAABB0Uk5T////////////////////AOAjXRkAAACYSURBVHjaLI8JDgMgCAQ5BVG3//9t0XYTE2Y5BPq0IGpwtxtTP4G5IFNMnmEKuCopPKUN8VTNpEylNgmCxjZa2c1kafpHSvMkX6sWe7PTkwRX1dY7gdyMRHZdZ98CF6NZT2ecMVaL9tmzTtMYcwbP y3XeTgZkF5s1OSHwRzo1fkILgWC5R0X4BHYu7t/136wO71DbvwVYADUkQegpokSjwAAAABJRU5ErkJggg=='.replace(' ', '+')
imgdata = base64.b64decode(data)
filename = 'some_image.jpg'  # I assume you have a way of picking unique filenames
with open(filename, 'wb') as f:
        f.write(imgdata)