如何使用python将Outlook API中的pdf附件保存到文件

import requests
import json
import base64

# 这里需要根据实际情况填写Outlook API的授权信息
client_id = 'YOUR_CLIENT_ID'
client_secret = 'YOUR_CLIENT_SECRET'
refresh_token = 'YOUR_REFRESH_TOKEN'

# 构建请求头部
headers = {
    'Content-Type': 'application/x-www-form-urlencoded'
}

# 构建请求体
data = {
    'grant_type': 'refresh_token',
    'client_id': client_id,
    'client_secret': client_secret,
    'refresh_token': refresh_token,
    'redirect_uri': 'http://localhost'
}

# 发送请求获取访问令牌
response = requests.post('https://login.microsoftonline.com/common/oauth2/v2.0/token', headers=headers, data=data)
access_token = json.loads(response.text)['access_token']

# 构建请求头部
headers = {
    'Authorization': 'Bearer ' + access_token,
    'Content-Type': 'application/json'
}

# 构建请求参数
params = {
    '$select': 'subject,attachments',
    '$filter': 'hasAttachments eq true'
}

# 发送请求获取邮件列表
response = requests.get('https://graph.microsoft.com/v1.0/me/messages', headers=headers, params=params)
emails = json.loads(response.text)['value']

# 遍历邮件列表，找到包含PDF附件的邮件
for email in emails:
    subject = email['subject']
    attachments = email['attachments']
    for attachment in attachments:
        if attachment['contentType'] == 'application/pdf':
            attachment_id = attachment['id']
            attachment_name = attachment['name']
            break

# 构建请求头部
headers = {
    'Authorization': 'Bearer ' + access_token,
    'Content-Type': 'application/json'
}

# 发送请求下载PDF附件
response = requests.get('https://graph.microsoft.com/v1.0/me/messages/{email_id}/attachments/{attachment_id}/$value', headers=headers)
attachment_data = response.content

# 保存PDF附件到文件
with open(attachment_name, 'wb') as f:
    f.write(base64.b64decode(attachment_data))