CODEWITHSUNDEEP
restsharp
Frederik V
Frederik V

Reputation: 183

RestSharp infinitely adds User-Agent header until target API returns 400 - Bad Req - Headers too long

I recently upgraded RestSharp to 107.3.0 in the hope to fix some connectivity issues (as mentioned in the documentation).

After 1 hour of being live on production with this upgrade, my targetted API started throwing '400 Bad Request - Headers too long'. A recycle was only a temporary fix.

When I use Fiddler to see my API calls (locally), I noticed that the User-agent header contains:

RestSharp/107.3.0.0 RestSharp/107.3.0.0 RestSharp/107.3.0.0 (...)

... and each next call adds the agent name to the growing header value until the header is, well, just too long.

Anyone else experienced this before?

Upvotes: 0

Views: 833

Answers (1)

Frederik V
Frederik V

Reputation: 183

Turns out I was creating a RestClient(httpClient) object each time, but re-using the same HTTP client. Creating an instance of RestClient initializes some default headers, resulting in infinitely adding the user agent header value.

Re-using the RestClient as well, fixed the behavior.

Upvotes: 2

Related Questions