处理 Azure Function 中的 HttpStatus 302

Question

在 Azure Function 中，我正在尝试 return 来自 MS Graph Converter (Doc)

的 pdf 文件

文件 return 处于 302 Http 状态，在本地没什么大不了的，一切正常，但是当我在 azure 函数上发布时我遇到了这个错误：

502 - Web server received an invalid response while acting as a gateway or proxy server. There is a problem with the page you are looking for, and it cannot be displayed. When the Web server (while acting as a gateway or proxy) contacted the upstream content server, it received an invalid response from the content server.

我的代码：

IConfidentialClientApplication confidentialClientApplication = ConfidentialClientApplicationBuilder
             .Create("")
             .WithTenantId("")
             .WithClientSecret("") 
             .Build();

            ClientCredentialProvider authProvider = new ClientCredentialProvider(confidentialClientApplication);


            var graphClient = new GraphServiceClient(authProvider);


  var token = await authProvider.ClientApplication.AcquireTokenForClient(new string[] { "https://graph.microsoft.com/.default" }).ExecuteAsync();


            HttpClient httpClient = new HttpClient();

            httpClient.DefaultRequestHeaders.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", token.AccessToken);
            try
            {
                var response = await httpClient.GetAsync($"https://graph.microsoft.com/v1.0/drives/{Drive_Id}/items/{Item_Id}/content?format=pdf");

                log.LogInformation($"Status Code : {response.StatusCode}");

                if (response.StatusCode == System.Net.HttpStatusCode.Redirect)
                {
                    var bytes = await httpClient.GetByteArrayAsync(response.Headers.Location);

                    return new FileContentResult(bytes, "application/pdf");
                }

                if (response.StatusCode == System.Net.HttpStatusCode.OK)
                {
                    var bytes = await response.Content.ReadAsByteArrayAsync();

                    return new FileContentResult(bytes, "application/pdf");
                }

            }
            catch (Exception ex)
            {
                log.LogInformation($"Error : {ex.Message}");
            }

            return new NotFoundResult();

我认为有某种配置允许 302 临时重定向或类似的东西..

任何帮助都将不胜感激

Answer 1

我发现我的 pb 正在上传文件，流关闭得太早，导致函数退出...