python-requests - 如何从 python requests 模块构造 curl 命令？

Question

Python requests是一个很好的模块来简化我的 web REST API 访问编程，我通常如下所示

import json
url = 'https://api.github.com/some/endpoint'
payload = {'some': 'data'}
headers = {'Content-type': 'application/json', 'Accept': 'application/json'}

r = requests.post(url, data=json.dumps(payload), headers=headers)

当出现错误时，我想看看它背后发生了什么。构建 curl命令在命令行中重现是常用的方式，因为这是在 RESP API 文档中描述最多的标准方式

try:
    r = requests.post(url, data=json.dumps(payload), headers=headers)
except Exception as ex:
    print "try to use curl command below to reproduce"
    print curl_request(url,"POST",headers,payload)

能生成 curl就好了此请求的命令示例，参见 libcloud's debug 中的好示例，我找不到简单的构造方法，下面是我想自己创建的方法。

# below code is just pseudo code, not correct 
def curl_request(url,method,headers,payloads):
    # construct curl sample from requests' structure
    # $ curl -v -H "Accept: application/json" -H "Content-type: application/json" 
    # -d '{"some":"data"}' 
    # -X POST https://api.github.com/some/endpoint
    request = "curl -v "
    for header in headers:
        print header
        request = request + '-H "' + header + ": " + headers[header] + '" '
    for payload in payloads:
        request = request + '-d {} "' + payload + ": " + payloads[payload] + '" '         
    request = request + "-X %s %s" % (method,url)
    return request

如果我们在 requests 中有方法也会很好已经

以下是获得答案的最终解决方案，对我有用。在此处显示以供您引用

def curl_request(url,method,headers,payloads):
    # construct the curl command from request
    command = "curl -v -H {headers} {data} -X {method} {uri}"
    data = "" 
    if payloads:
        payload_list = ['"{0}":"{1}"'.format(k,v) for k,v in payloads.items()]
        data = " -d '{" + ", ".join(payload_list) + "}'"
    header_list = ['"{0}: {1}"'.format(k, v) for k, v in headers.items()]
    header = " -H ".join(header_list)
    print command.format(method=method, headers=header, data=data, uri=url)    

Answer 1

您也可以使用curlify去做这个。

$ pip install curlify
...
import curlify
print(curlify.to_curl(r.request))  # r is the response object from the requests library.