C#發起HTTP請求Post請求

瀏覽器能看到的數據  用后端模擬請求都能獲取到  如果拿不到 看看是不是請求參數哪里沒設置 剛好服務器檢查了這個參數

 

 

            string url = "";
            string para = "";
            HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(url);//創建請求對象
            request.Method = "Post";//請求方式
            request.KeepAlive = true;
            request.ContentType = "application/json";//請求頭參數
            byte[] bytes = System.Text.Encoding.UTF8.GetBytes(para);//設置請求參數
            request.ContentLength = bytes.Length;
            Stream stream = request.GetRequestStream();
            stream.Write(bytes, 0, bytes.Length);//寫入參數
            stream.Close();
            using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())//響應對象
            {
                StreamReader reader = new StreamReader(response.GetResponseStream());
                string str = reader.ReadToEnd();//獲取返回的頁面信息
                //根據返回的格式 創建一個對象  把Json反序列化成對應的類型對象
                //反序列化的時候需要先創建一個模型來存放數據
                Dto dto = JsonConvert.DeserializeObject<Dto>(str);
            }

 

設置請求頭參數

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request.Headers.Add( "Accept" , "*/*" );   request.Headers.Add( "Accept-Encoding" , "gzip, deflate, sdch" );   request.Headers.Add( "Accept-Language" , "zh-CN,zh;q=0.9" );   request.KeepAlive = true ; // request.Connection = "keep-alive"; // request.Headers.Add("Cookie", "");   request.Host = "sshhbhaokn.jin10.com:8083" ;     request.Headers.Add( "Referer" , "https://hero.jin10.com/" );     request.UserAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36" ;

　　

 

在f12的元素上 右鍵 copy Xpath 可以拷貝出當前元素的位置  

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獲取token請求  

 1. 用上面那種把參數先轉成字節才寫入會報錯 

 2.設置請求頭長度也會報錯