基础类库积累--HTTP操作类

前言:

积累Http

HttpPost

 public static string Post(string url, string data, Dictionary<string, string> headers)
        {
            byte[] bytes = Encoding.UTF8.GetBytes(data);
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);

            if (headers != null)
            {
                foreach (var key in headers.Keys)
                {
                    request.Headers.Add(key, headers[key]);
                }
            }

            //写数据
            request.Method = "POST";
            request.ContentLength = bytes.Length;
            request.ContentType = "application/json";
            Stream reqstream = request.GetRequestStream();
            reqstream.Write(bytes, 0, bytes.Length);

            //读数据
            request.Timeout = 300000;
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            Stream streamReceive = response.GetResponseStream();
            StreamReader streamReader = new StreamReader(streamReceive, Encoding.UTF8);
            string strResult = streamReader.ReadToEnd();

            //关闭流
            reqstream.Close();
            streamReader.Close();
            streamReceive.Close();
            request.Abort();
            response.Close();

            return strResult;
        }

简介:

  • url:请求地址
  • data:发送的数据
  • headers:头部信息
  • ContentType:这个要注意,如果Post的时候报HTTP:403,请检查你传递的数据格式,以及传递的类型

HttpGet


public static String Get(String url, Encoding encode)
{
  HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
  request.Method = "GET";
  request.ContentType = "text/html, application/xhtml+xml, */*";

  HttpWebResponse response = (HttpWebResponse)request.GetResponse();
  Stream rs = response.GetResponseStream();
  StreamReader sr = new StreamReader(rs, encode);
  var result = sr.ReadToEnd();
  sr.Close();
  rs.Close();
  return result;
}

简介:

  • url:请求的地址
  • encode:请求网页的编码【如果编码不一样,请求的结果可能是乱码】
  • ContentType:不同的地址,他返回的类型不一样[如果是API的接口,一般是application/json,如果是网页,一般是text/html]

总结:

在C#后台开发过程中,我们经常会用到Http的Get和Post这两种方式,还有其他的方式什么Delete,Put自己了解,我用C#做爬虫的时候,有时候需要解析网页,使用HttpGet,获取网页信息进行处理,有时候需要模拟用户登陆【走协议】,使用HttpPost提交数据。

原文地址:https://www.cnblogs.com/2828sea/p/13473929.html

posted @ 2020-08-13 11:08  喜欢吃鱼的青年  阅读(151)  评论(0编辑  收藏  举报