surround all requests by try-catch bloc

[shabakett]

how to auto surround all requests by try-catch bloc?
example : force

var result1 = await api1.Method1Async(param1, param2);

to execute as:

try
{
	return await api1.Method1Async(param1, param2);
}
catch (Exception x)
{
	Log.AppendLine(x.Message);
	if (x is HttpRequestException c && c.StatusCode == null) return "Check your Internet connection";
	return x.Message;
}

[canton7]

One fairly common pattern is something like:

private async Task<string> DoRequest(Func<ISomeApi, Task<string>> method)
{
	try
	{
		return await method(api1);
	}
	catch (Exception x)
	{
		Log.AppendLine(x.Message);
		if (x is HttpRequestException c && c.StatusCode == null) return "Check your Internet connection";
		return x.Message;
	}
}

Then:

var result1 = await DoRequest(x => x.Method1Async(param1, param2));

Another option is to use a RequestModifier, and catch exceptions in there. The downside is that you still need to return a HttpResponseMessage, rather than a string.

[shabakett]

please post an example on how to use the RequestModifier with HttpClient in this case

[canton7]

Oops, no, a `RequestModifier won't help here. A Custom HttpClient might though.

public class CustomHttpClientHandler : WebRequestHandler
{
    protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
    {
        try
        {
            return await base.SendAsync(request, cancellationToken)o
        }
        catch (Exception e)
        {
            return <something suitable>;
        }
    }
}

[shabakett]

I think this is the most appropriate way, just I use public class CustomHttpClientHandler : HttpClientHandler and in the catch block I return new HttpResponseMessage { Content = new StringContent(e.Message) }