python使用urllib2发送http请求

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# -*-coding:utf8-*-
import re
import json
import urllib
import urllib2
from poster.encode import multipart_encode
from poster.streaminghttp import register_openers# ##
# @param url：请求地址，字符串，http://xxx.xx.com/xx
# @param method: 请求方式，字符串，仅支持GET、POST、PUT、DELETE、HEAD
# @param user_header：请求头，字典，{"key":"value"}
# @param request_body_type：请求体类型，字符串，仅支持form-data、x-www-form-urlencoded、raw格式
# @param request_body_data：请求体，字符串或者字典。
# # 1、如果是form-data、x-www-form-urlencoded格式的，传字典；
# # 2、如果是raw格式的，可传字典或字符串。
# ##
def get_api_response(url, method, user_header, request_body_type, request_body_data):try:# GET请求if re.match(method, "get", re.IGNORECASE):request = urllib2.Request(url)# POST请求/PUT请求elif re.match(method, "post", re.IGNORECASE) or re.match(method, "put", re.IGNORECASE):# 处理form-data格式请求体if re.match(request_body_type, "form-data", re.IGNORECASE):register_openers()# headers 包含必须的 Content-Type 和 Content-Length# data 是一个生成器对象，返回编码过后的参数data, headers = multipart_encode(request_body_data)request = urllib2.Request(url, data, headers)# 处理x-www-form-urlencoded格式请求体elif re.match(request_body_type, "x-www-form-urlencoded", re.IGNORECASE):data = urllib.urlencode(request_body_data)request = urllib2.Request(url, data)# 处理raw格式请求体elif re.match(request_body_type, "raw", re.IGNORECASE):if type(request_body_data) == str:data = json.JSONDecoder().decode(request_body_data)else:data = request_body_dataif type(data) == list:data = json.JSONEncoder().encode(data)else:data = urllib.urlencode(data)request = urllib2.Request(url, data)if re.match(method, "put", re.IGNORECASE):request.get_method = lambda: 'PUT'# DELETE请求elif re.match(method, "delete", re.IGNORECASE):request = urllib2.Request(url)request.get_method = lambda: 'DELETE'# HEAD请求else:request = urllib2.Request(url)request.get_method = lambda: 'HEAD'# 统一添加请求头if user_header:for keys in user_header:request.add_header(keys, user_header[keys])response = urllib2.urlopen(request)result_data = response.read()response_code = response.codeexcept urllib2.HTTPError, e:result_data = ""response_code = e.coderesult = {"code": response_code, "data": result_data}return result