Python/Flask 谷歌 API 集成

Question

我是 Python 和 Flask 的新手...我开发了一个 python 文件，它使用 googele 设置 Oauth2 身份验证并从 GMAIL API 获取消息列表。这是我的代码

import json
import flask
import httplib2
import base64
import email

from apiclient import discovery, errors
from oauth2client import client


app = flask.Flask(__name__)


@app.route('/')
def index():
    if 'credentials' not in flask.session:
        return flask.redirect(flask.url_for('oauth2callback'))
    credentials = client.OAuth2Credentials.from_json(flask.session['credentials'])
    if credentials.access_token_expired:
        return flask.redirect(flask.url_for('oauth2callback'))
    else:
        http_auth = credentials.authorize(httplib2.Http())
        gmail_service = discovery.build('gmail', 'v1', http_auth)
        threads = gmail_service.users().threads().list(userId='me').execute()
        return json.dumps(threads)


@app.route('/oauth2callback')
def oauth2callback():
    flow = client.flow_from_clientsecrets(
        'client_secrets.json',
        scope='https://mail.google.com/',
        redirect_uri=flask.url_for('oauth2callback', _external=True)
    )
    if 'code' not in flask.request.args:
        auth_uri = flow.step1_get_authorize_url()
        return flask.redirect(auth_uri)
    else:
        auth_code = flask.request.args.get('code')
        credentials = flow.step2_exchange(auth_code)
        flask.session['credentials'] = credentials.to_json()
        return flask.redirect(flask.url_for('index'))

@app.route('/getmail')
def getmail():
    if 'credentials' not in flask.session:
        return flask.redirect(flask.url_for('oauth2callback'))
    credentials = client.OAuth2Credentials.from_json(flask.session['credentials'])
    if credentials.access_token_expired:
        return flask.redirect(flask.url_for('oauth2callback'))
    else:
        http_auth = credentials.authorize(httplib2.Http())
        gmail_service = discovery.build('gmail', 'v1', http_auth)
        query = 'is:inbox'
        """List all Messages of the user's mailbox matching the query.

        Args:
        service: Authorized Gmail API service instance.
        user_id: User's email address. The special value "me"
        can be used to indicate the authenticated user.
        query: String used to filter messages returned.
        Eg.- 'from:user@some_domain.com' for Messages from a particular sender.

        Returns:
        List of Messages that match the criteria of the query. Note that the
        returned list contains Message IDs, you must use get with the
        appropriate ID to get the details of a Message.
        """
        try:
            response = gmail_service.users().messages().list(userId='me', q=query).execute()
            messages = []
            if 'messages' in response:
                print 'test %s' % response
                messages.extend(response['messages'])
            while 'nextPageToken' in response:
                page_token = response['nextPageToken']
                response = gmail_service.users().messages().list(userId='me', q=query, pageToken=page_token).execute()
                messages.extend(response['messages'])

            return messages
        except errors.HttpError, error:
            print 'An error occurred: %s' % error

if __name__ == '__main__':
    import uuid
    app.secret_key = str(uuid.uuid4())
    app.debug = True
    app.run()

身份验证工作正常，当我转到 /getmail URL 时，我收到此错误 TypeError: 'list' object is not callable

有没有想过我做错了什么？

Answer 1

我将 Flask 中的返回对象从 return messages 更改为这段代码。

首先我导入到 from flask.json import jsonify

try:
    response = gmail_service.users().messages().list(userId='me', q=query).execute()
    messages = []
    if 'messages' in response:
        print 'test %s' % response
        messages.extend(response['messages'])
    while 'nextPageToken' in response:
        page_token = response['nextPageToken']
        response = gmail_service.users().messages().list(userId='me', q=query, pageToken=page_token).execute()
        messages.extend(response['messages'])

    return jsonify({'data': messages}) # changed here
except errors.HttpError, error:
    print 'An error occurred: %s' % error

所有功劳归于@doru