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Extracts body of gmail mail
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| ''' | |
| Example of usage: | |
| from googleapiclient.discovery import build | |
| from httplib2 import Http | |
| from oauth2client import file | |
| # Create google client first, for example | |
| storage = file.Storage('path_to_google_oauth_credentials') | |
| creds = storage.get() | |
| http = creds.authorize(Http()) | |
| gmail_client = build('gmail', 'v1', http=http) | |
| # then retrieve mail data by API call | |
| gmail_message_id = 12345 | |
| gmail_mail = gmail_client.users().messages().get(userId='me', id=gmail_message_id).execute() | |
| # finally, extract mail body | |
| mail_body = get_mail_body(gmail_mail['payload']) | |
| ''' | |
| import base64 | |
| from typing import List | |
| def get_mail_body(payload: dict) -> str: | |
| if payload['mimeType'] in ('text/html', 'text/plain'): | |
| data = payload['body'].get('data') | |
| if data: | |
| return encode_decode_body(data) | |
| for part in sort_parts_by_mime_type(payload.get('parts', [])): | |
| return get_mail_body(part) | |
| return payload.get('snippet', 'Can not read gmail body') | |
| def encode_decode_body(body: str) -> str: | |
| return base64.urlsafe_b64decode(body.encode('ASCII')).decode() | |
| def sort_parts_by_mime_type(parts: List) -> List: | |
| res = [] | |
| for mime_type in ('text/html', 'text/plain'): # try to extract HTML first, then plain text | |
| for p in parts: | |
| if p['mimeType'] == mime_type: | |
| res.append(p) | |
| for p in parts: | |
| if p['mimeType'].startswith('multipart'): | |
| res.append(p) | |
| return res |
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