'Xamarin HttpClient request on Local network gets NameResolutionFailure error

Need to make a request with a local network server. If machine name is known, but not IP address.

string serverAddress = "mylocalserver";
System.Net.ServicePointManager.DnsRefreshTimeout = 0;
HttpClientHandler handler = new HttpClientHandler();
handler.UseDefaultCredentials = true;
HttpClient client = new HttpClient(handler);
var url = $"http://{serverAddress}/";
var response = await client.GetAsync(url);
response.EnsureSuccessStatusCode();

but it fails with

System.Net.Http.HttpRequestException: An error occurred while sending the request ---> System.Net.WebException: Error: NameResolutionFailure

c++sharp.netxamarinxamarin.iosmono


Solution 1:[1]

The NameResolutionFailure is typically a DNS name resolve error.

In general, if your server is in a domain (and configured correctly), you should be ale to reach it by it's full name:

yourlocalserver.yourdomain.local

If you don't have a domain, than you can also configure a "DNS override" in the local system. This is different per OS. For example, in windows its the host file located in %WINPATH%\System32\drivers\etc.

Third, you can have a DNS in your network without a fully configured domain. If the server is in it you should consult the DNS for the correct address.

Sources

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Source: Stack Overflow

Solution Source
Solution 1 Stefan

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