使用 Python-Request 发布 REST 帖子
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REST post using Python-Request
提问by Suave Nti
Why doesn't this simple code POST data to my service:
为什么这个简单的代码不向我的服务发送数据：
import requests
import json
data = {"data" : "24.3"}
data_json = json.dumps(data)
response = requests.post(url, data=data_json)
print response.text
And my service is developed using WCF like this :
我的服务是使用 WCF 开发的，如下所示：
[OperationContract]
[WebInvoke(Method = "POST", UriTemplate = "/test", ResponseFormat =
WebMessageFormat.Json,RequestFormat=WebMessageFormat.Json)]
string test(string data );
Note: If is remove the input parameter dataeverything works fine, what may be the issue.
注意：如果删除输入参数data一切正常，可能是什么问题。
采纳答案by Martijn Pieters
You need to set the content type header:
您需要设置内容类型标题：
data = {"data" : "24.3"}
data_json = json.dumps(data)
headers = {'Content-type': 'application/json'}
response = requests.post(url, data=data_json, headers=headers)
If I set urlto http://httpbin.org/post, that server echos back to me what was posted:
如果我设置url为http://httpbin.org/post，该服务器会向我回显发布的内容：
>>> import json
>>> import requests
>>> import pprint
>>> url = 'http://httpbin.org/post'
>>> data = {"data" : "24.3"}
>>> data_json = json.dumps(data)
>>> headers = {'Content-type': 'application/json'}
>>> response = requests.post(url, data=data_json, headers=headers)
>>> pprint.pprint(response.json())
{u'args': {},
u'data': u'{"data": "24.3"}',
u'files': {},
u'form': {},
u'headers': {u'Accept': u'*/*',
u'Accept-Encoding': u'gzip, deflate, compress',
u'Connection': u'keep-alive',
u'Content-Length': u'16',
u'Content-Type': u'application/json',
u'Host': u'httpbin.org',
u'User-Agent': u'python-requests/1.0.3 CPython/2.6.8 Darwin/11.4.2'},
u'json': {u'data': u'24.3'},
u'origin': u'109.247.40.35',
u'url': u'http://httpbin.org/post'}
>>> pprint.pprint(response.json()['json'])
{u'data': u'24.3'}
If you are using requestsversion 2.4.2 or newer, you can leave the JSON encoding to the library; it'll automatically set the correct Content-Type header for you too. Pass in the data to be sent as JSON into the jsonkeyword argument:
如果您使用的是requests2.4.2 或更高版本，则可以将 JSON 编码留给库；它也会自动为您设置正确的 Content-Type 标头。将要作为 JSON 发送的数据传入json关键字参数：
data = {"data" : "24.3"}
response = requests.post(url, json=data)
