[BUG] AzureOpenAIClient does not accept PDF files (returns 400 invalid_value), but OpenAIClient accepts PDF file

[lucianteodorescu-milestone]

Library name and version

Azure.AI.OpenAI 2.3.0-beta.1

Describe the bug

The file is added in the list of ChatMessage using

var document = BinaryData.FromBytes(File.ReadAllBytes("C:\\OpenAIFiles\\myTestPdfFileName.pdf"));
 new UserChatMessage(ChatMessageContentPart.CreateFilePart(document, "application/pdf", "myTestPdfFileName.pdf"))

When using OpenAIClient client from OpenAI 2.3.0 package, the PDF is read and everything works as expected.

But when I use AzureOpenAIClient from Azure.AI.OpenAI 2.3.0-beta.1, it returns:

"HTTP 400 (invalid_request_error: invalid_value)
Parameter: messages[2].content[0].type
Invalid Value: 'file'. This model does not support file content types."

at OpenAI.ClientPipelineExtensions.ProcessMessageAsync(ClientPipeline pipeline, PipelineMessage message, RequestOptions options)
at OpenAI.Chat.ChatClient.CompleteChatAsync(BinaryContent content, RequestOptions options)
at OpenAI.Chat.ChatClient.CompleteChatAsync(IEnumerable`1 messages, ChatCompletionOptions options, CancellationToken cancellationToken)

Expected behavior

using AzureOpenAIClient should be able to process the PDF files just as OpenAI's OpenAIClient does.

Actual behavior

using AzureOpenAIClient returns 400 invalid_value when PDF files are used.

Reproduction Steps

use Azure.AI.OpenAI nuget, with chat completion client (any supported model).
add a PDF file as part of the input ChatMessage list.
call client.CompleteChat(messages) or await client.CompleteChatAsync(messages)

Environment

No response

[github-actions]

Thanks for the feedback! We are routing this to the appropriate team for follow-up. cc @jpalvarezl @trrwilson.