Failed to get message with JsonReaderException, when it is a forwarding appointment

[bagdxk]

Describe the bug
Calling below function, if the message is a forwarding appointment.

_client.Me.Messages[msgId.UrlEncode()].GetAsync()

And get below error

       ---> System.Text.Json.JsonReaderException: The input does not contain any JSON tokens. Expected the input to start with a valid JSON token, when isFinalBlock is true. LineNumber: 0 | BytePositionInLine: 0.
         at System.Text.Json.ThrowHelper.ThrowJsonReaderException(Utf8JsonReader& json, ExceptionResource resource, Byte nextByte, ReadOnlySpan`1 bytes)
         at System.Text.Json.Utf8JsonReader.Read()
         at System.Text.Json.JsonDocument.Parse(ReadOnlySpan`1 utf8JsonSpan, JsonReaderOptions readerOptions, MetadataDb& database, StackRowStack& stack)
         at System.Text.Json.JsonDocument.Parse(ReadOnlyMemory`1 utf8Json, JsonReaderOptions readerOptions, Byte[] extraRentedArrayPoolBytes, PooledByteBufferWriter extraPooledByteBufferWriter)
         at System.Text.Json.JsonDocument.Parse(Stream utf8Json, JsonDocumentOptions options)
         at Microsoft.Kiota.Serialization.Json.JsonParseNodeFactory.GetRootParseNode(String contentType, Stream content)
         at Microsoft.Kiota.Abstractions.Serialization.ParseNodeProxyFactory.GetRootParseNode(String contentType, Stream content)
         at Microsoft.Kiota.Abstractions.Serialization.ParseNodeFactoryRegistry.GetRootParseNode(String contentType, Stream content)
         at Microsoft.Kiota.Http.HttpClientLibrary.HttpClientRequestAdapter.GetRootParseNode(HttpResponseMessage response)
         at Microsoft.Kiota.Http.HttpClientLibrary.HttpClientRequestAdapter.SendAsync[ModelType](RequestInformation requestInfo, ParsableFactory`1 factory, Dictionary`2 errorMapping, CancellationToken cancellationToken)
         at Microsoft.Graph.Me.Messages.Item.MessageItemRequestBuilder.GetAsync(Action`1 requestConfiguration, CancellationToken cancellationToken)

To Reproduce
I am developing an outlook add-in, which call my web API to process mail messages.

Steps to reproduce the behavior:

1. Send an appointment to some one.
2. Open the appointment and forward to someone else.
3. The outlook add-in is triggered and calls the web API, in the web API it reads message by graph API
4. And get above exception

Expected behavior
I expect the application can read the message, no exception.

Desktop (please complete the following information):

• OS: [Windows 10]
• Browser [Outlook, or Edge]
• Version [Mirsoft.Graph 5.9.0 or 5.16.0]

[andrueastman]

Thanks for raising this @bagdxk

Any chance the result id different if you do not encode the message id?(as the SDK does handle encoding, double encoding may occur)

_client.Me.Messages[msgId].GetAsync()

[bagdxk]

I tried to remove the UrlEncode and got same error.
BTW UrlEncode is like below, so it doesn't change the msgId in this case..

public static string UrlEncode(this string text) => Uri.EscapeDataString(text);

[andrueastman]

Any chance you are able to share the contents of the response if you try this out to confirm if the response is indeed valid json?

            var requestInformation = graphClient.Me.Messages[msgId].ToGetRequestInformation();
            var responseStream = await graphClient.RequestAdapter.SendPrimitiveAsync<Stream>(requestInformation);
            using var streamReader = new StreamReader(responseStream);
            var response = await streamReader.ReadToEndAsync();
            Console.Write(response);

[bagdxk]

Tested, the responsestream is null, in the code above.

And try below code, the body is empty string. And confirmed the statuscode is 200.

            var request = await _client.RequestAdapter.ConvertToNativeRequestAsync<HttpRequestMessage>(_client.Me.Messages[msgId.UrlEncode()].ToGetRequestInformation());
            HttpClient httpClient = new HttpClient();
            var response = httpClient.Send(request);
            var body = await response.Content.ReadAsStringAsync();

[andrueastman]

Thanks for the getting back @bagdxk

With the body is empty, any chance you can also confirm whether there is a value set for the content header? Ideally the serializer should be invoked if there is non-null content (which means there should also be no content type).

response.Content.Headers.ContentType

[bagdxk]

The contenttype is

{application/json; odata.metadata=minimal; odata.streaming=true; IEEE754Compatible=false; charset=utf-8}
CharSet [string]:
"utf-8"
MediaType [string]:
"application/json"
Parameters [ICollection]:
Count = 4
[0] [NameValueHeaderValue]:
{odata.metadata=minimal}
[1] [NameValueHeaderValue]:
{odata.streaming=true}
[2] [NameValueHeaderValue]:
{IEEE754Compatible=false}
[3] [NameValueHeaderValue]:
{charset=utf-8}
Raw View
Non-Public members

[bagdxk]

Thanks @andrueastman the quick fix from client sdk side.
BTW is this a graph api server side issue too? May I know where I can report the issue?