Question

我想用我的Windows Universal App制作一个Json Post Request。我在Android和IOS中工作。

   public String DoServiceCall()
    {
        var request = (HttpWebRequest)WebRequest.Create(string.Format("{2}/{0}/{0}ServiceJson.svc/{1}", "Authentication", "Authenticate", "https://....."));

        using (MemoryStream ms = new MemoryStream())
        {
            // create the request object
            string requestString = JSONRequest;
            byte[] requestData = Encoding.UTF8.GetBytes(requestString);
            request.Method = "POST";
            request.ContentType = "application/json; charset=UTF-8";
            request.ContentLength = requestData.Length;
            request.AllowAutoRedirect = false;

            // add known cookies to request (needed for authentication)
            CookieContainer requestCookies = new CookieContainer();
            foreach (Cookie knownCookie in this._cookieCollection)
            {
                requestCookies.Add( knownCookie);
            }
            request.CookieContainer = requestCookies;

            //For getting rid of the https Problem
            ServicePointManager.ServerCertificateValidationCallback += (sender, cert, chain, sslPolicyErrors) => true;

            using (Stream stream =  request.GetRequestStream())
            {
                stream.Write(requestData, 0, requestData.Length);
            }
            // get response data
            HttpWebResponse response = (HttpWebResponse) request.GetResponse();

            string responseString = new StreamReader(response.GetResponseStream()).ReadToEnd();
            return (responseString);
        }
    }

问题在于Windows Universal不支持。

request.ContentLength = requestData.Length;
request.AllowAutoRedirect = false;
requestCookies.Add( knownCookie); //with only one Argument
ServicePointManager.ServerCertificateValidationCallback += (sender, cert, chain, sslPolicyErrors) => true;

它也不支持。

request.GetRequestStream())
(HttpWebResponse) request.GetResponse();

但我可以用异步

修复

await request.GetRequestStreamAsync())
(HttpWebResponse)await request.GetResponseAsync();

但如果没有4行，我就无法在Windows上运行它。我没有得到任何回应。是否有选项可以让它在Windows 10上运行，或者是否有工作替代方案。

Answer 1

所以我终于找到了解决方案。基于评论，我尝试了HttpClient。但系统命名空间中的Stanard Httpclient不支持过滤器，我需要通过SSL证书问题。幸运的是，在Windows.Web.Http命名空间中，还有另一个支持过滤器的HttpClient。答案是功能齐全的HttpClient Post Call。

public async void testcallwind()
    {
        List<HttpCookie> cookieCollection = new List<HttpCookie>();
        HttpBaseProtocolFilter filter = new HttpBaseProtocolFilter();
        HttpClient httpClient;
        filter.IgnorableServerCertificateErrors.Add(ChainValidationResult.Untrusted);//Allow untrusted CA's 
        filter.IgnorableServerCertificateErrors.Add(ChainValidationResult.Expired);
        // add known cookies to request (needed for authentication)
        foreach (HttpCookie knownCookie in cookieCollection)
        {
            filter.CookieManager.SetCookie(knownCookie);
        }
        httpClient = new HttpClient(filter);
        string resourceAddress = string.Format("https://...");
        string requestString = "{\"request\":{\"CallerState\":null,...."}}";
        byte[] requestData = Encoding.UTF8.GetBytes(requestString);        
        UnicodeEncoding en = new UnicodeEncoding();

        IHttpContent content = new HttpStringContent(requestString, 0, "application/json");
        Uri postBody = new Uri(resourceAddress);            

        var response = await httpClient.PostAsync(postBody, content);
        httpClient.Dispose();
        var test = response.Content;
    }

Windows-Universal https发布Xamarin表单

1 个答案: