如何将POST参数解析为REST服务？

Question

看来我有另一个JSON问题,这次发布到REST服务.我在用Flask-Restful.

api.add_resource(Records, '/rest/records/<string:email>/<string:password>/<string:last_sync_date>')

parser = reqparse.RequestParser()
parser.add_argument('record_date', type=str)
parser.add_argument('records', type=str)
parser.add_argument('rating', type=str)
parser.add_argument('notes', type=str)

class Records(Resource):
    def post(self, email, password, last_sync_date):
        args = parser.parse_args()
        records = args['records'] # 'records' = None, but why? 
        return records, 201

单元测试:

resource_fields = {
            'record_date': fields.String,
            'rating': fields.Integer,
            'notes': fields.String,
            'last_updated': fields.DateTime,
        }
records = {"records":[]}
records["records"].append(marshal(record1, resource_fields))
    rv = self.app.post('/rest/records/{0}/{1}/{2}'.format(email, password, sync_date), data=json.dumps(records))

json.dumps(记录)是:

str: {"records": [{"rating": 1, "notes": null, "last_updated": "Tue, 15 Oct 2013 15:52:44 -0000", "record_date": "2013-10-15 15:52:44.746815"}]}

为什么args['records']没有,我明确地通过网络发送它？

更新:

奇怪的是,当我发送一个单独的对象时,它的所有花花公子.这么奇怪:

record = dict(record_date=record1.record_date, rating=record1.rating, notes=record1.notes, last_updated=record1.last_updated)

rv = self.app.post('/rest/records/{0}/{1}/{2}'.format(email, password, sync_date), data=record)

args:

{'records': None, 'notes': None, 'task': None, 'record_date': '2013-10-15 16:48:40.662744', 'rating': '1'}

Answer 1

最后我把这个问题作为一个问题来解决烧瓶问题github并得到了这个解决方案,这对我有用.感谢Doug Black.

reqparse并不真正知道如何处理JSON.要处理JSON帖子,您需要使用flask.request.json dict.

这是您可能想要的更新示例:

from flask import Flask, request
from flask.ext import restful

class Records(restful.Resource):
    def post(self, email, password, last_sync_date):
        records = request.json['records']
        return records, 201

app = Flask(__name__)
api = restful.Api(app)
api.add_resource(
    Records, 
    '/rest/records/<string:email>/<string:password>/<string:last_sync_date>'
)

request.json上的文档就在这里.

您需要确保将内容类型标头设置为application/json,以便知道填充json字典.

self.app.post(
    '/rest/records/{0}/{1}/{2}'.format(email, password, sync_date), 
    data=json.dumps(records), 
    headers={'Content-Type': 'application/json'
)