閱讀HttpResponseMessage.Content拋出Newtonsoft.Json.JsonReaderException當閱讀webapi 2令牌

嗨我已經寫了一段代碼，應該從ac＃桌面應用程序登錄到WebAPI 2網站一切接縫工作，但我得到一個Newtonsoft.Json .JsonReaderException與消息如下閱讀HttpResponseMessage.Content拋出Newtonsoft.Json.JsonReaderException當閱讀webapi 2令牌

讀取字符串時出錯。意外的令牌：StartObject。路徑''，第1行，位置1.

我的代碼如下。

static internal async Task<string> GetBearerToken(string siteUrl, string Username, string Password) 
{ 
    HttpClient client = new HttpClient(); 
    client.BaseAddress = new Uri(siteUrl); 
    client.DefaultRequestHeaders.Accept.Clear(); 

    HttpContent content = new StringContent("grant_type=password&username=" + Username + "&password=" + Password, Encoding.UTF8, "application/x-www-form-urlencoded"); 

    Task<HttpResponseMessage> responseTask = client.PostAsync("Token", content); 
    HttpResponseMessage response = await responseTask; 

    if (response.IsSuccessStatusCode) 
    { 
    Task<string> message = response.Content.ReadAsAsync<string>(); 

    return await message; 
    } 
    else 
    { 
    return null; 
    } 
}

所報告的提琴手

HTTP/1.1 200 OK 
Cache-Control: no-cache 
Pragma: no-cache 
Content-Length: 593 
Content-Type: application/json;charset=UTF-8 
Expires: -1 
Server: Microsoft-IIS/8.0 
Set-Cookie: .AspNet.Cookies=vo5b0v_43BLYlfz-rYTZ-TSGi9Rg5jSd9bvKn9693e-Kx3mMI1JVX1Sk-696f_fnPEFPRwFrNWvdMfDWUTWBElfQF3UfcUAxEE5aU5zRgI40sYKapXXnC2ucIiNKCqVsceve0cxNQYVAIr_YhMNjFLRqBX7H3BTPVKGist2AeUkWw6S4VNijx5iQhvWrAvF4xlJSznCiykNqR-QHD_ZLM5-H3GZoghrkvMpr27eXY4mLIqg4lwV2Qah0gQlXnjuWbHHZqLj5HcID1S7_OfPldBE3YqBOR2JxHLITg3yPw3lbXNkHc1UDdG9HExq0faJptz0SBqd8tIeZ7buoJTZ4LHV0TcYSEs4HZ3-Bd84XX7XeWPa5qnTaAJqXaW2FAigD38a9ASr15r5wnzWv9xQxlg; path=/; HttpOnly 
X-SourceFiles: =?UTF-8?B?RDpcMDYgUHJvamVjdEphZGVcMDIgU2FuZGJveFwwNCBDbGVhbnVwIEFQSSBBY2NvdW50XENsZWFudXBBUElBY2NvdW50XFRva2Vu?= 
X-Powered-By: ASP.NET 
Date: Sun, 02 Mar 2014 15:22:57 GMT 

{"access_token":"hM_60CprAm6DqCe7qgte1vsnih2d4j1Uy_FDlgoPkEgS_4u0__4lk5KNd0XysTktOfwMw4ffH3uaRmNaFObVnEY3yWS70hio03azUbCrFKk0VNgj31Y0_zLrd-J0ScZ4vzLdtw7KAXtNfcYySKk1EFtJRB4yYcqvobwORC3eu1VHyYInqy7kBgIhAZYE_NZ3zQrrGerZjy__zCuDdRtXO-klkFtg3dONq7cMP_TBi6xLmBjhXlhzUTKGzOrofijlkyMNHF1rx0CgWjhqEx2rJU8Hakq4Bac1pCqoLaYm91DRSrYO--ff4GWlP5wLeqZAhHIA7t17e2pyZXrUT7V1ExBeCnGkWbWoR8Y-QN8ocT7Q3xjydFd4uWSQD5B-Z1bC-nLpUrtkOGZiukl6J3aCJOqeidY6MEM4TMaJZlIp-Oc","token_type":"bearer","expires_in":1209599,"userName":"Alice",".issued":"Sun, 02 Mar 2014 15:22:57 GMT",".expires":"Sun, 16 Mar 2014 15:22:57 GMT"}

我懷疑JSON解析器的原始效應初探消息需要一個不同的消息格式則是越來越。我不想更改webapi網站，所以我可能不得不更改客戶端實現。我不是我必須改變或者我必須去看的地方。

來源

2014-03-02 Sander Obdeijn

你說你* JsonReaderException *，但在你的問題張貼任何關於JSON。你如何反序列化迴應？ –

我只是使用ReadAsAsync （）方法。我無處設置特定的解析器。所以我希望C＃能夠做到這一點。我無法將例外與我的任何代碼聯繫起來。 –

經過一番激烈的谷歌搜索後，我的代碼工作。

我做的第一件事是添加了一個額外的類來存儲令牌。

class TokenResponseModel 
{ 
    [JsonProperty("access_token")] 
    public string AccessToken { get; set; } 

    [JsonProperty("token_type")] 
    public string TokenType { get; set; } 

    [JsonProperty("expires_in")] 
    public int ExpiresIn { get; set; } 

    [JsonProperty("userName")] 
    public string Username { get; set; } 

    [JsonProperty(".issued")] 
    public string IssuedAt { get; set; } 

    [JsonProperty(".expires")] 
    public string ExpiresAt { get; set; } 
}

之後，我將我的代碼更改爲以下代碼。

static internal async Task<TokenResponseModel> GetBearerToken(string siteUrl, string Username, string Password) 
{ 
    HttpClient client = new HttpClient(); 
    client.BaseAddress = new Uri(siteUrl); 
    client.DefaultRequestHeaders.Accept.Clear(); 

    HttpContent requestContent = new StringContent("grant_type=password&username=" + Username + "&password=" + Password, Encoding.UTF8, "application/x-www-form-urlencoded"); 

    HttpResponseMessage responseMessage = await client.PostAsync("Token", requestContent); 

    if (responseMessage.IsSuccessStatusCode) 
    { 
     string jsonMessage; 
     using (Stream responseStream = await responseMessage.Content.ReadAsStreamAsync()) 
     { 
      jsonMessage = new StreamReader(responseStream).ReadToEnd(); 
     } 

     TokenResponseModel tokenResponse = (TokenResponseModel)JsonConvert.DeserializeObject(jsonMessage, typeof(TokenResponseModel)); 

     return tokenResponse; 
    } 
    else 
    { 
     return null; 
    } 
}

我現在可以從2的WebAPI的網站在我的客戶得到了承載令牌這樣我就可以把它添加到未來的要求。我希望這對其他人有幫助。

來源

2014-03-08 20:49:16

另一種方式來做到這一點是：

TokenResponseModel tokenResponse = await response.Content.ReadAsAsync<TokenResponseModel>();

來源

2015-05-06 11:40:27 Lidia

閱讀HttpResponseMessage.Content拋出Newtonsoft.Json.JsonReaderException當閱讀webapi 2令牌

回答

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