Fix httpclient.postasync one or more error message

Question

Fix httpclient.postasync one or more error message

Praveen Chandra 20

Hi team, at my asp.net mvc webapi application integrated third party api for sending request using httpclient.postasync method with request body. It works locally at iis side getting response 200. but failing at azure web app services, error message displaying like “one or more errors:: system.task.. Boolean….” Error code 500. At stack trace it was showing at line postasync method. Also please note that same publish working in another web app service.

I have tried another approach and failed by using httpwebrequest

Bruce (SqlWork.com) 74,936 Reputation points

2023-08-04T15:24:13.71+00:00

A 500 error means the third party api accepted the request, but had a fatal error processing the request. This is typically the payload or headers are invalid. The response body may have more information on what caused the error.

contact your 3rd party for more information on the cause.
Praveen Chandra 20 Reputation points

2023-08-05T05:25:10.1133333+00:00

Thanks, but same publish file works in another azure webapp service(Given same headers and same request payload)
AgaveJoe 1,510 Reputation points

2023-08-05T13:45:46.9566667+00:00

You have to understand, the community does not have the code, access to the API, or the request/response. All we know is the post causes a 500 error. As stated above, a 500 error is a server error. Usually due to a problem with the HTTP payload or headers.

I would compare the working HTTP request with the HTTP request that does not work as expected. Write a little C# to log the requests or use a proxy tool like Fiddler to capture the requests.

Have you tried contacting the 3rd party API for assistance?
Praveen Chandra 20 Reputation points

2023-08-06T16:27:02.9933333+00:00

AgaveJoe yes maintaining the log, error mentioned above extracted from log only. Also pls read my query again I got this issue only at one of the app service not at another. Anyway I found the issue, Problem occurring due to networking VNet integration, given some changes at vnet now api call working.

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Bruce (SqlWork.com) 74,936 Reputation points

2023-08-04T15:24:13.71+00:00

A 500 error means the third party api accepted the request, but had a fatal error processing the request. This is typically the payload or headers are invalid. The response body may have more information on what caused the error.

contact your 3rd party for more information on the cause.
Praveen Chandra 20 Reputation points

2023-08-05T05:25:10.1133333+00:00

Thanks, but same publish file works in another azure webapp service(Given same headers and same request payload)
AgaveJoe 1,510 Reputation points

2023-08-05T13:45:46.9566667+00:00

You have to understand, the community does not have the code, access to the API, or the request/response. All we know is the post causes a 500 error. As stated above, a 500 error is a server error. Usually due to a problem with the HTTP payload or headers.

I would compare the working HTTP request with the HTTP request that does not work as expected. Write a little C# to log the requests or use a proxy tool like Fiddler to capture the requests.

Have you tried contacting the 3rd party API for assistance?
Praveen Chandra 20 Reputation points

2023-08-06T16:27:02.9933333+00:00

AgaveJoe yes maintaining the log, error mentioned above extracted from log only. Also pls read my query again I got this issue only at one of the app service not at another. Anyway I found the issue, Problem occurring due to networking VNet integration, given some changes at vnet now api call working.

Answer 1

@Anonymous , Thanks for the follow-up and update.

Based on your last comment, I understand you have resolved the issue.
Glad to know that the issue is resolved.

You may always checkout: Troubleshoot virtual network integration with Azure App Service

To benefit the community, I can post a summary of this issue:

Symptom:

Upon deploying ASP.NET MVC WebAPI application to Azure Web App services, using the HttpClient.PostAsync method to send requests to a third-party API results in an error. While the process works smoothly on a local IIS server with a successful 200 response, in the Azure environment, the operation fails with an error message indicating "one or more errors:: system.task.. Boolean…," and an associated error code of 500.
The same publish works fine another Azure WebApps.

Fix: (by Cherryinfy)

The issue was arising due to the integration of the networking Virtual Network (VNet). After making certain modifications to the VNet configuration, the API calls are now functioning correctly.

Kindly let us know, thanks for your cooperation!
(I'll convert this comment to answer)

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Fix httpclient.postasync one or more error message

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