java - Python - 如何发出 REST POST 请求

Question

我已经用 Java 实现了一个 REST 服务:

@POST
@Path("/policyinjection")
@Produces(MediaType.APPLICATION_JSON) 
public String policyInjection(String request) {

    String queryresult = null;
    String response = null;

    if (request == null) {
        logger.warning("empty request");
    } else {

        //call query() to query redisDB with the request
        queryresult = query(request);

        // call inject() to inject returned policy to floodlight
        response = inject(queryresult);

    }
    return response;
}

但是我需要用Python实现客户端向上述服务发起POST请求。我是 python 的新手，我想实现一个方法，就像这样:

def callpolicyInjection():

Answer 1

我不确定这是否是您确切问题的答案，但您应该查看 requests模块。

它允许在一行中发送 http POST 请求(以及 (m) 任何其他 http 方法):

>>> import requests

>>> keys = {'username':'Sylvain', 'key':'6846135168464431', 'cmd':'do_something'}
>>> r = requests.post("http://httpbin.org/post",params=keys)

---

现在，答案在 r 对象中:

>>> print(r)
<Response [200]>

>>> print(r.text)
{
  "origin": "70.57.167.19",
  "files": {},
  "form": {},
  "url": "http://httpbin.org/post?cmd=do_something&key=6846135168464431&username=Sylvain",
  "args": {
    "username": "Sylvain",
    "cmd": "do_something",
    "key": "6846135168464431"
  },
  "headers": {
    "Content-Length": "0",
    "Accept-Encoding": "identity, gzip, deflate, compress",
    "Connection": "close",
    "Accept": "*/*",
    "User-Agent": "python-requests/1.2.3 CPython/3.3.1 Linux/3.2.0-0.bpo.4-amd64",
    "Host": "httpbin.org"
  },
  "json": null,
  "data": ""
}

...这些只是示例。查看请求 response content有关详细信息的文档。