LInkedIn oAuth2请求令牌400错误请求

Question

public void RequestAuthentication(System.Web.HttpContextBase context, System.Uri returnUrl)
{
    string url = String.Format("https://www.linkedin.com/uas/oauth2/authorization?response_type=code" +
                 "&client_id={0}" +
                 "&scope={1}" +
                 "&state={3}" +
                 "&redirect_uri={2}",this._consumerKey,_scope,HttpUtility.UrlEncode(returnUrl.ToString()),Guid.NewGuid().ToString());
    context.Response.Redirect(url);
}

public AuthenticationResult VerifyAuthentication(System.Web.HttpContextBase context)
{
    //TODO: check CSRF
    string code = context.Request.QueryString["code"];

    string rawUrl = context.Request.Url.OriginalString;
    //From this we need to remove code portion
    rawUrl = Regex.Replace(rawUrl, "&code=[^&]*", "");

    string authUrl = "https://www.linkedin.com/uas/oauth2/accessToken";
    string postData = String.Format("grant_type=authorization_code&code={0}&redirect_uri={1}&client_id={2}&client_secret={3}", code,HttpUtility.UrlEncode(context.Request.QueryString["ReturnUrl"]), _consumerKey, _consumerSecret);

    //WebClient client = new WebClient();
    //var getReq =  client.DownloadString(authUrl + "?" + postData);

    HttpWebRequest webRequest = WebRequest.Create(authUrl + "?" + postData) as HttpWebRequest;
    webRequest.Method = "POST";

    //This "application/x-www-form-urlencoded"; line is important
    webRequest.ContentType = "application/x-www-form-urlencoded";

    webRequest.ContentLength = postData.Length;

    StreamWriter requestWriter = new StreamWriter(webRequest.GetRequestStream());
    requestWriter.Write(postData);
    requestWriter.Close();

    StreamReader responseReader = new StreamReader(webRequest.GetResponse().GetResponseStream());
}

Answer 1

您必须在两者中使用相同的redirect_uri

public void RequestAuthentication(System.Web.HttpContextBase context, System.Uri returnUrl)

而且

public AuthenticationResult VerifyAuthentication(System.Web.HttpContextBase context)

功能。但是在您的代码中，第一个函数HttpUtility.UrlenCode(returnurl.ToString())和第二个函数HttpUtility.UrlenCode(context.request.queryString[“returnurl”])的redirect_uri是不同的（我认为）。因此请确保您已经解决了此问题。你的代码可能是有效的。