python使用urllib2发送http请求

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# -*-coding:utf8-*-import reimport jsonimport urllibimport urllib2from poster.encode import multipart_encodefrom 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_data                if 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.code    except urllib2.HTTPError, e:        result_data = ""        response_code = e.code    result = {"code": response_code, "data": result_data}    return result
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