使用 ASP.NET WebForms VB.NET 的 Microsoft (REST/GRAPH) 授权

Question

在这方面工作了将近一个月但收效甚微，非常感谢任何帮助。

我必须从 Outlook 帐户获取日历项目。设法让它在带有 C# 的 ASP.NET MVC 中工作，将代码移植到 ASP.NET WebForms 上的 VB.NET，但没有成功。

我只能找到适用于 MVC 的代码示例和授权方法，但我必须在其中实现它的应用程序仍然使用 WebForms（aspx 页面）

我已经尝试过 Microsoft Restful API 和 Graph API，但它们似乎都只支持 MVC。与他们需要的授权方法相同，（Azure AD v1、v2、oauth、sdk）

有什么建议吗？

Answer 1

Graph Client 库可能不支持 webForm(VB.net)，但 Restful Graph API 应该可以正常工作。几乎任何语言或框架都可以使用 Restful Graph API。对于ASP.NET WebForms上的VB.NET，因为现在官方不推荐/不支持，所以很多逻辑需要我们自己处理（HttpClient）或者使用3rd lib。

只需一个 vb.net 示例供您参考，忽略 WebForms 本身，只需将代码复制到您需要的位置并将逻辑修改为您想要的。

https://www.example-code.com/vbnet/microsoft_graph_oauth2_access_token.asp

Dim oauth2 As New Chilkat.OAuth2
Dim success As Boolean

'  This should be the port in the localhost callback URL for your app.
'  The callback URL would look like "http://localhost:3017/" if the port number is 3017.
oauth2.ListenPort = 3017

oauth2.AuthorizationEndpoint = "https://login.microsoftonline.com/common/oauth2/v2.0/authorize"
oauth2.TokenEndpoint = "https://login.microsoftonline.com/common/oauth2/v2.0/token"

'  Replace these with actual values.
oauth2.ClientId = "MICROSOFT-GRAPH-CLIENT-ID"
'  This is your app password:
oauth2.ClientSecret = "MICROSOFT-GRAPH-CLIENT-SECRET"

oauth2.CodeChallenge = False
'  Provide a SPACE separated list of scopes.
'  See https://developer.microsoft.com/en-us/graph/docs/authorization/permission_scopes

'  Important: To get a refresh token in the final response, you have to ask for "offline_access" scope
oauth2.Scope = "openid profile offline_access user.readwrite mail.readwrite mail.send"

'  Begin the OAuth2 three-legged flow.  This returns a URL that should be loaded in a browser.
Dim url As String = oauth2.StartAuth()
If (oauth2.LastMethodSuccess <> True) Then
    Debug.WriteLine(oauth2.LastErrorText)
    Exit Sub
End If


'  At this point, your application should load the URL in a browser.
'  For example,
'  in C#:  System.Diagnostics.Process.Start(url);
'  in Java: Desktop.getDesktop().browse(new URI(url));
'  in VBScript: Set wsh=WScript.CreateObject("WScript.Shell")
'               wsh.Run url
'  in Xojo: ShowURL(url)  (see http://docs.xojo.com/index.php/ShowURL)
'  The Microsoft account owner would interactively accept or deny the authorization request.

'  Add the code to load the url in a web browser here...
'  Add the code to load the url in a web browser here...
'  Add the code to load the url in a web browser here...



'  Now wait for the authorization.
'  We'll wait for a max of 30 seconds.
Dim numMsWaited As Integer = 0
While (numMsWaited < 30000) And (oauth2.AuthFlowState < 3)
    oauth2.SleepMs(100)
    numMsWaited = numMsWaited + 100
End While

'  If there was no response from the browser within 30 seconds, then
'  the AuthFlowState will be equal to 1 or 2.
'  1: Waiting for Redirect. The OAuth2 background thread is waiting to receive the redirect HTTP request from the browser.
'  2: Waiting for Final Response. The OAuth2 background thread is waiting for the final access token response.
'  In that case, cancel the background task started in the call to StartAuth.
If (oauth2.AuthFlowState < 3) Then
    oauth2.Cancel()
    Debug.WriteLine("No response from the browser!")
    Exit Sub
End If



'  Check the AuthFlowState to see if authorization was granted, denied, or if some error occurred
'  The possible AuthFlowState values are:
'  3: Completed with Success. The OAuth2 flow has completed, the background thread exited, and the successful JSON response is available in AccessTokenResponse property.
'  4: Completed with Access Denied. The OAuth2 flow has completed, the background thread exited, and the error JSON is available in AccessTokenResponse property.
'  5: Failed Prior to Completion. The OAuth2 flow failed to complete, the background thread exited, and the error information is available in the FailureInfo property.
If (oauth2.AuthFlowState = 5) Then
    Debug.WriteLine("OAuth2 failed to complete.")
    Debug.WriteLine(oauth2.FailureInfo)
    Exit Sub
End If


If (oauth2.AuthFlowState = 4) Then
    Debug.WriteLine("OAuth2 authorization was denied.")
    Debug.WriteLine(oauth2.AccessTokenResponse)
    Exit Sub
End If


If (oauth2.AuthFlowState <> 3) Then
    Debug.WriteLine("Unexpected AuthFlowState:" & oauth2.AuthFlowState)
    Exit Sub
End If


Debug.WriteLine("OAuth2 authorization granted!")
Debug.WriteLine("Access Token = " & oauth2.AccessToken)

'  Get the full JSON response:
Dim json As New Chilkat.JsonObject
json.Load(oauth2.AccessTokenResponse)
json.EmitCompact = False

'  The JSON response looks like this:

'  {
'   "token_type": "Bearer",
'    "scope": "User.Read Mail.ReadWrite Mail.Send",
'    "expires_in": 3600,
'    "ext_expires_in": 0,
'    "access_token": "EwBAA8l6B...",
'    "refresh_token": "MCRMdbe...",
'    "id_token": "eyJ0eXA..."
'  }

'  If an "expires_on" member does not exist, then add the JSON member by
'  getting the current system date/time and adding the "expires_in" seconds.
'  This way we'll know when the token expires.
If (json.HasMember("expires_on") <> True) Then
    Dim dtExpire As New Chilkat.CkDateTime
    dtExpire.SetFromCurrentSystemTime()
    dtExpire.AddSeconds(json.IntOf("expires_in"))
    json.AppendString("expires_on",dtExpire.GetAsUnixTimeStr(False))
End If


Debug.WriteLine(json.Emit())

'  Save the JSON to a file for future requests.
Dim fac As New Chilkat.FileAccess
fac.WriteEntireTextFile("qa_data/tokens/microsoftGraph.json",json.Emit(),"utf-8",False)

另一个由我们自己处理逻辑的参考，而不是第三个库。

Accessing imgUr thru OAuth (uploading to user account)