Question

我正在尝试使用Ms Graph API连接到Outlook和下载附件。我到现在所写的是

 private static async Task<HttpWebRequest> createHttpRequestWithToken(Uri uri)
 {
        HttpWebRequest newRequest = (HttpWebRequest)HttpWebRequest.Create(uri);

        string clientId = "myClientId";
        string clientSecret = "myClientSecret";
        ClientCredential creds = new ClientCredential(clientId, clientSecret);

        AuthenticationContext authContext = new AuthenticationContext("https://login.windows.net/myAzureAD/oauth2/token");
        AuthenticationResult authResult = await authContext.AcquireTokenAsync("https://graph.microsoft.com/", creds);
        newRequest.Headers.Add(HttpRequestHeader.Authorization, "Bearer " + authResult.AccessToken);
        newRequest.ContentType = "application/json";

        return newRequest;
  }

我正在使用它来调用我需要的Graph API。首先，我尝试调用此URL：

Uri uri = new Uri(("https://graph.microsoft.com/v1.0/users/myEmailId/messages"));
HttpWebRequest request = createHttpRequestWithToken(uri).Result;
HttpWebResponse response = (HttpWebResponse)request.GetResponse();

运行代码后，我得到HttpStatusCode 200的响应，但Content-Length为-1。我现在被困在这里。有人可以帮助我解决我出错的地方/如何进一步调试这段代码。

提前致谢。

Answer 1

API使用“Transfer-Encoding：chunked”，因此不返回Content-Length标头。这就是为什么你看到response.ContentLength属性的默认值为-1。要读取响应主体，只需读取response.GetResponseStream（）方法获得的响应流。

Microsoft Graph API：HttpStatusCode 200，Content-Length -1？

1 个答案: