无法 post 使用 Python 烧瓶 restful 端点
Unable to post to flask restful endpoint with Python
我有一个端点接受 JSON
api.add_resource(EventsList, '/events')
合剂 Restful / SQL 炼金术是:
class EventsList (Resource):
#RETURNS ALL EVENTS
def get(self):
schema = EventSchema()
result = db.session.query(EventModel).all()
return schema.dump(result, many=True), 200
#POSTS A SINGLE EVENT
def post(self):
title = request.json['title']
date = request.json['date']
event = EventModel(title=title,date=date)
db.session.add(event)
db.session.commit()
data = ({'title': event.title,
'date': event.date})
response = jsonify(data)
response.status_code = 200
return response
当通过命令行使用 curl 时,这绝对没问题:
卷曲请求
curl http://localhost:5002/events -H "Content-Type: application/json" -d '{"title": "TEst Event 3", "date":"2020-02-23"}'
卷曲响应
响应包含预期的数据:
{"date":"Sun, 23 Feb 2020 00:00:00 GMT","title":"TEst Event 3"}
一切正常。但是,当我尝试从 Python 执行此操作时,我收到服务器错误。
Python
import importlib
import subprocess
import csv
import sys
import requests
targetWikiPage = input("Target Wiki Page: ")
eventTitle = input("Event Title: ")
eventDate = input("Event Date: ")
#POST AN EVENT
data = '{"title": "'+eventTitle+'","date":"'+eventDate+'"}'
print("SENDING EVENT DATA:")
print(requests.body)
print(requests.headers)
response = requests.post("http://localhost:5002/events", json=data)
服务器控制台输出
[2020-09-28 16:38:14,182] ERROR in app: Exception on /events [POST]
Traceback (most recent call last):
File "/usr/local/lib/python3.8/site-packages/flask/app.py", line 1950, in full_dispatch_request
rv = self.dispatch_request()
File "/usr/local/lib/python3.8/site-packages/flask/app.py", line 1936, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "/usr/local/lib/python3.8/site-packages/flask_restful/__init__.py", line 468, in wrapper
resp = resource(*args, **kwargs)
File "/usr/local/lib/python3.8/site-packages/flask/views.py", line 89, in view
return self.dispatch_request(*args, **kwargs)
File "/usr/local/lib/python3.8/site-packages/flask_restful/__init__.py", line 583, in dispatch_request
resp = meth(*args, **kwargs)
File "api.py", line 155, in post
title = request.json['title']
TypeError: string indices must be integers
127.0.0.1 - - [28/Sep/2020 16:38:14] "POST /events HTTP/1.1" 500 -
感谢任何帮助。
您在字符串对象中有 JSON 数据。尝试通过字符串的键从字符串中提取值将产生您描述的错误
>>> response = '{"date":"Sun, 23 Feb 2020 00:00:00 GMT","title":"TEst Event 3"}'
>>> response_date = response["date"]
Traceback (most recent call last):
File "<pyshell#1>", line 1, in <module>
response_date = response["date"]
TypeError: string indices must be integers
您需要先将字符串转换为dict
,然后提取值
>>> import json
>>> response_as_json = json.loads(response)
>>> response_date = response_as_json["date"]
>>> response_date
'Sun, 23 Feb 2020 00:00:00 GMT'
已修复此问题。
问题在于我如何将数据发送到服务器。这是我的:
targetWikiPage = input("Target Wiki Page: ")
eventTitle = input("Event Title: ")
eventDate = input("Event Date: ")
#POST AN EVENT
data = '{"title": "'+eventTitle+'","date":"'+eventDate+'"}'
print("SENDING EVENT DATA:")
print(requests.body)
print(requests.headers)
response = requests.post("http://localhost:5002/events", json=data)
请注意,我的 requests.post
传递了两个值。 url 和数据。
问题如下:
- 数据格式不正确。这应该是:
data = json.dumps({"title": eventTitle, "date": eventDate})
- 我需要添加 headers:
headers = {'Content-type': 'application/json', 'Accept': 'text/plain'}
- 我需要向服务器传递一个
data
值,而不是 json
requests.post("http://localhost:5002/events", headers=headers, data=data)
将我的文件更改为:
targetWikiPage = input("Target Wiki Page: ")
eventTitle = input("Event Title: ")
eventDate = input("Event Date: ")
#POST AN EVENT
data = json.dumps({"title": eventTitle, "date": eventDate})
headers = {'Content-type': 'application/json', 'Accept': 'text/plain'}
print(data)
print(headers)
print("SENDING EVENT DATA:")
response = requests.post("http://localhost:5002/events", headers=headers, data=data)
json=json.loads(response.content)
我有一个端点接受 JSON
api.add_resource(EventsList, '/events')
合剂 Restful / SQL 炼金术是:
class EventsList (Resource):
#RETURNS ALL EVENTS
def get(self):
schema = EventSchema()
result = db.session.query(EventModel).all()
return schema.dump(result, many=True), 200
#POSTS A SINGLE EVENT
def post(self):
title = request.json['title']
date = request.json['date']
event = EventModel(title=title,date=date)
db.session.add(event)
db.session.commit()
data = ({'title': event.title,
'date': event.date})
response = jsonify(data)
response.status_code = 200
return response
当通过命令行使用 curl 时,这绝对没问题:
卷曲请求
curl http://localhost:5002/events -H "Content-Type: application/json" -d '{"title": "TEst Event 3", "date":"2020-02-23"}'
卷曲响应
响应包含预期的数据:
{"date":"Sun, 23 Feb 2020 00:00:00 GMT","title":"TEst Event 3"}
一切正常。但是,当我尝试从 Python 执行此操作时,我收到服务器错误。
Python
import importlib
import subprocess
import csv
import sys
import requests
targetWikiPage = input("Target Wiki Page: ")
eventTitle = input("Event Title: ")
eventDate = input("Event Date: ")
#POST AN EVENT
data = '{"title": "'+eventTitle+'","date":"'+eventDate+'"}'
print("SENDING EVENT DATA:")
print(requests.body)
print(requests.headers)
response = requests.post("http://localhost:5002/events", json=data)
服务器控制台输出
[2020-09-28 16:38:14,182] ERROR in app: Exception on /events [POST]
Traceback (most recent call last):
File "/usr/local/lib/python3.8/site-packages/flask/app.py", line 1950, in full_dispatch_request
rv = self.dispatch_request()
File "/usr/local/lib/python3.8/site-packages/flask/app.py", line 1936, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "/usr/local/lib/python3.8/site-packages/flask_restful/__init__.py", line 468, in wrapper
resp = resource(*args, **kwargs)
File "/usr/local/lib/python3.8/site-packages/flask/views.py", line 89, in view
return self.dispatch_request(*args, **kwargs)
File "/usr/local/lib/python3.8/site-packages/flask_restful/__init__.py", line 583, in dispatch_request
resp = meth(*args, **kwargs)
File "api.py", line 155, in post
title = request.json['title']
TypeError: string indices must be integers
127.0.0.1 - - [28/Sep/2020 16:38:14] "POST /events HTTP/1.1" 500 -
感谢任何帮助。
您在字符串对象中有 JSON 数据。尝试通过字符串的键从字符串中提取值将产生您描述的错误
>>> response = '{"date":"Sun, 23 Feb 2020 00:00:00 GMT","title":"TEst Event 3"}'
>>> response_date = response["date"]
Traceback (most recent call last):
File "<pyshell#1>", line 1, in <module>
response_date = response["date"]
TypeError: string indices must be integers
您需要先将字符串转换为dict
,然后提取值
>>> import json
>>> response_as_json = json.loads(response)
>>> response_date = response_as_json["date"]
>>> response_date
'Sun, 23 Feb 2020 00:00:00 GMT'
已修复此问题。
问题在于我如何将数据发送到服务器。这是我的:
targetWikiPage = input("Target Wiki Page: ")
eventTitle = input("Event Title: ")
eventDate = input("Event Date: ")
#POST AN EVENT
data = '{"title": "'+eventTitle+'","date":"'+eventDate+'"}'
print("SENDING EVENT DATA:")
print(requests.body)
print(requests.headers)
response = requests.post("http://localhost:5002/events", json=data)
请注意,我的 requests.post
传递了两个值。 url 和数据。
问题如下:
- 数据格式不正确。这应该是:
data = json.dumps({"title": eventTitle, "date": eventDate})
- 我需要添加 headers:
headers = {'Content-type': 'application/json', 'Accept': 'text/plain'}
- 我需要向服务器传递一个
data
值,而不是json
requests.post("http://localhost:5002/events", headers=headers, data=data)
将我的文件更改为:
targetWikiPage = input("Target Wiki Page: ")
eventTitle = input("Event Title: ")
eventDate = input("Event Date: ")
#POST AN EVENT
data = json.dumps({"title": eventTitle, "date": eventDate})
headers = {'Content-type': 'application/json', 'Accept': 'text/plain'}
print(data)
print(headers)
print("SENDING EVENT DATA:")
response = requests.post("http://localhost:5002/events", headers=headers, data=data)
json=json.loads(response.content)