如何使用 base64 解码解码 json 文件？

Question

我有一个 json 文件，我必须只提取键“数据”的值并解码 base64 编码。

这是 json 文件

{
    "equno": "229151246954324320",
    "data": "CdwL703m6njjyJ7tdEXdRoYKKv49oatv9UWvdLONpWgd407fakXNfbt18j+qKb/toYgHZvj34ig7iu4XN7BfrqTf/wNsIdVNJ67cH9hCyIfULWLgyT01vQ7u5zS5vSB9hazXTQHRYGxpV+eCrVFMEdxHId54sJDn+KL8hea93WyQKlFwMDO0QQD5X2lK02Y88uI7MehBUFXzK5jNTgKmLtUE9KoM4xF6bEzm2oNMrxz0QwOB4b/tvRvhThb/r+Wgb32gV3UBZBZ/RP4ID+lc7JE7TLVRyeGCNA+uV11/no358XZdGo/E5Aq7KZ95W+rQ8TE3/PLbodAhWZ+1wAcXvfuxJxpIm0giOZv3Dys/pZesM5wbdwaNrFnD+ngHfXB67IxiBM3oRRxC7CBHoFvQFjC8g2E3dk1ELP6VPex24lPJY1JeBwuy8DQroN7rxa4bwLAE6Z3SyL16dpwYdMmAB2YN2h4nMGfl1TMXPGsJKxcSv4tBLj905WTGYgDKG3sQ0AR4YHoPKni7/rUZQb/hM25wXFKYNRzGU6EIleCTP4fl1vqASLFUHDS0GqjwcYkCOilvDbb3PqNqDzPEI84L7XDidiWQ8XKfzw7ryjuIaw1b1ODqN3+ctnny88WXTzANzwA5wjqfhDJDGpHr58fQgi1/j2QIsFBt+VoOslxvx1YQvbubDTwM7dTEwWDY0U5+l8KvSv9fYIMbNYxjwXU3tR2SFhClumNjisUE0lHgCBAfkbTA5Fw9eW3+QRZdB5rY/7DWgxlRnBORZ54c5xxTnsk2ntFm14zQA8HN7zv09FQW+sMk6B767cyzi5HoEkf+PjnNh78OrIPVOFtigMYUb5PdDWDzjDCu2+9dN4mm5aml+/SIOFDUHg6aX+GLj7c0tI0thMFAR6dKP6QtmVbUanF7gSt+L2c4qRq48s3QYMlrTr++PqeoCYNuhWIo2iXllvzERarLDU/pxZNfGB39bFmjmiAnLwmDqNZuVTi40/A38AI+r4f39Y/eywskz/rco1CZGUXxd0FJj0pwdO9H0eedwVgXAmi3KYy3j5MZBWeObqs/ufvRpHjDeh54Bq91DrxcKPya/b6FGDxH73jIgB9Y9x/mbZq2h20H9fbbV+hTk8XIA5ItY+2N9J7FHiJ+NyQbl4UNZT/GVF4HS+NXplgzEAEIlzgRwrNoY0GJzeocxZlAa5f5ANu7OHltqpSTAZ0PzVCopG1NgwaQEpS08mVAtgXo7jq34VejdNuHiTo+/ht3Dn+C+WzKXHZIABkhHjGg1Bv4hJHuLXIpQjIE0xwQo2UcTmcAYvrGO6FcHZz+eRUmJyrtsJczwZK7nimfgJ6T/iuggPVwyn9pifU9VA=="
}

我试过使用 jq

 jq -r '.[].data' < test.json | base64 --decode

但是我得到了这个错误：

jq: error (at <stdin>:3): Cannot index string with string "data"

我不知道如何解决这个错误。我也尝试使用 python 但无法解码。请帮助我！

Answer 1

Python 中有一种方法可以做到这一点：

import base64
import json
with open("sample_data.json") as f: 
    text = f.read()
    d = json.loads(text)
    data = base64.b64decode(d["data"])

变量 data 现在包含 json 文件中相关项目的解码内容。

Answer 2

考虑到您已将 json 数据加载到一个对象中。然后您可以尝试以下操作：

import json
import base64

json_obj = {
    "equno": "229151246954324320",
    "data": "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"
}

print(base64.b64decode(json_obj["data"]))

Answer 3

如果 .data 中的字符串是 UTF-8 字符串的有效 base64 编码，则以下等价：

jq -r .data input.json | base64 -D

和

jq -r '.data|@base64d' input.json

正好，给定的JSON，base64显示有问题：

$ jq -r .data input.json | base64 -D
Invalid character in input stream.

如何使用 base64 解码解码 json 文件？

How can I decode a json File using base64 decode?

python

ubuntu

base64

json

jq