如何使用AutoRedirect从C#HTTPWebRequest访问文件内容

我正在尝试调用一个应该返回身份验证令牌的URL。 数据被发布到URL，并在多次重定向后返回带有标记的JSON对象。 我用的是C#和WPF

以下是我所做工作的摘录：

            HttpWebRequest request1 = (HttpWebRequest)WebRequest.Create(action);
            request1.Method = "POST";

            StringBuilder sb = new StringBuilder();
            String boundary = "-----------------------------1721856231228";
            foreach (elem in elems)
            {
                String nameStr = elem.GetAttribute("name");
                if (nameStr != null && nameStr.Length != 0)
                {
                    String valueStr = elem.GetAttribute("value");
                    sb.Append("\r\n" + boundary + "\r\n");
                    sb.Append("Content-Disposition: form-data; name=\"" + nameStr + "\"" + "\r\n");
                    sb.Append("\r\n");
                    sb.Append(valueStr);
                }
            }
            sb.Append("\r\n--" + boundary + "--" + "\r\n");
            String postData1 = sb.ToString();
            request1.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3";
            request1.UserAgent = "Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/77.0.3865.90 Safari/537.36";
            request1.ContentType = "application/x-www-form-urlencoded; boundary=" + boundary;
            request1.ContentLength = postData1.Length;
            request1.KeepAlive = true;
            request1.AllowAutoRedirect = true;

            StreamWriter w = new StreamWriter(request1.GetRequestStream());
            w.Write(postData1);
            w.Close();

            HttpWebResponse response1 = (HttpWebResponse)request1.GetResponse();
            StreamReader reader1 = new StreamReader(response1.GetResponseStream());
            String responseText1 = reader1.ReadToEnd();
            reader1.Close();
            response1.Close();

但是响应不包含带有标记的JSON。 我正在使用Fiddler，可以在上面代码的末尾暂停，而应该包含JSON的URI还没有被调用。我可以继续在调试器中执行其他代码，然后稍后，Fiddler将显示已调用的URI，并且一个文件下载弹出窗口允许我下载包含令牌的JSON文件。 我不希望弹出窗口，我希望能够以编程方式捕获JSON数据

我发现，通过在上面代码的末尾添加以下行，并在调试器中执行该行，Fiddler将报告令牌URL已被调用（我可以在Fiddler中看到正确的JSON响应）：

但我不知道如何访问此响应，或者如何使文件下载弹出窗口短路，以防不发生

也许KeepAlive设置中的某些内容会有所帮助？

尝试使用newtonsoft阅读 使用Newtonsoft.Json

TokenModel tokenModel;

StreamReader reader1 = new StreamReader(response1.GetResponseStream());
using (JsonTextReader reader = new JsonTextReader(reader1))
{    
 tokenModel = serializer.Deserialize<TokenModel>(reader);
}

TokenModel-TokenModel；
StreamReader reader1=新的StreamReader（response1.GetResponseStream（））；
使用（JsonTextReader reader=newjsontextreader（reader1））
{    
tokenModel=序列化程序。反序列化（读取器）；
}

参考：

或者您可以使用以下完整的请求和HttpClient的响应

        var client = new HttpClient();
        client.BaseAddress = new Uri("your url");
        int _TimeoutSec = 90;
        client.Timeout = new TimeSpan(0, 0, _TimeoutSec);
        string _ContentType = "application/x-www-form-urlencoded";            
        client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue(_ContentType));

       //if you have any content to send use following keyValuePair

        var kv = new List<KeyValuePair<string, string>>();
        kv.Add(new KeyValuePair<string, string>("key1", "value"));
        kv.Add(new KeyValuePair<string, string>("key2", "value"));


        var req = new HttpRequestMessage(System.Net.Http.HttpMethod.Post, "your url") { Content = new FormUrlEncodedContent(kv) };
        var responseAsyn = client.SendAsync(req);
        var response = responseAsyn.GetAwaiter().GetResult();

        TokenModel tokenResponse = new TokenModel();
        if (response.StatusCode == System.Net.HttpStatusCode.OK)
        {
            var responseString = response.Content.ReadAsStringAsync().GetAwaiter().GetResult();
            tokenResponse = JsonConvert.DeserializeObject<TokenModel>(responseString);
        }

var-client=new-HttpClient（）；
client.BaseAddress=新Uri（“您的url”）；
int _TimeoutSec=90；
client.Timeout=新的时间跨度（0,0，_TimeoutSec）；
字符串_ContentType=“application/x-www-form-urlencoded”；
client.DefaultRequestHeaders.Accept.Add（新MediaTypeWithQualityHeaderValue（_ContentType））；
//如果您有任何要发送的内容，请使用以下keyValuePair
var kv=新列表（）；
增加（新的KeyValuePair（“key1”，“value”））；
增加（新的KeyValuePair（“key2”，“value”））；
var req=new-HttpRequestMessage（System.Net.Http.HttpMethod.Post，“您的url”）{Content=new-FormUrlEncodedContent（kv）}；
var responseAsyn=client.SendAsync（req）；
var response=responseAsyn.GetAwaiter（）.GetResult（）；
TokenModel tokenResponse=新的TokenModel（）；
if（response.StatusCode==System.Net.HttpStatusCode.OK）
{
var responseString=response.Content.ReadAsStringAsync（）.GetAwaiter（）.GetResult（）；
tokenResponse=JsonConvert.DeserializeObject（responseString）；
}

我尝试了，但最终的URL和JSON响应仍然没有返回。我用HttpClient更新了完整的请求，这是任何返回JSON的post请求的工作代码

        var client = new HttpClient();
        client.BaseAddress = new Uri("your url");
        int _TimeoutSec = 90;
        client.Timeout = new TimeSpan(0, 0, _TimeoutSec);
        string _ContentType = "application/x-www-form-urlencoded";            
        client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue(_ContentType));

       //if you have any content to send use following keyValuePair

        var kv = new List<KeyValuePair<string, string>>();
        kv.Add(new KeyValuePair<string, string>("key1", "value"));
        kv.Add(new KeyValuePair<string, string>("key2", "value"));


        var req = new HttpRequestMessage(System.Net.Http.HttpMethod.Post, "your url") { Content = new FormUrlEncodedContent(kv) };
        var responseAsyn = client.SendAsync(req);
        var response = responseAsyn.GetAwaiter().GetResult();

        TokenModel tokenResponse = new TokenModel();
        if (response.StatusCode == System.Net.HttpStatusCode.OK)
        {
            var responseString = response.Content.ReadAsStringAsync().GetAwaiter().GetResult();
            tokenResponse = JsonConvert.DeserializeObject<TokenModel>(responseString);
        }