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Fixed error handling

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This commit is contained in:
Trevi Awater
2022-01-11 00:22:50 +01:00
parent bf2022e614
commit dd0be1e969
2 changed files with 30 additions and 38 deletions
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32
Xamarin.Neo4j/Xamarin.Neo4j/Xamarin.Neo4j/Services/Neo4jService.cs
View File

@@ -25,25 +25,39 @@ namespace Xamarin.Neo4j.Services
public async Task<bool> EstablishConnection(Neo4jConnectionString connectionString)
{
var boltUri = $"bolt://{connectionString.Host}:{connectionString.Port}";
var driver = GraphDatabase.Driver(boltUri, AuthTokens.Basic(connectionString.Username, connectionString.Password), builder =>
{
builder.WithEncryptionLevel(connectionString.Encrypted ? EncryptionLevel.Encrypted : EncryptionLevel.None);
});
GraphClient = new BoltGraphClient(driver);
try
{
var boltUri = $"bolt://{connectionString.Host}:{connectionString.Port}";
var driver = GraphDatabase.Driver(boltUri,
AuthTokens.Basic(connectionString.Username, connectionString.Password),
builder =>
{
builder.WithEncryptionLevel(connectionString.Encrypted
? EncryptionLevel.Encrypted
: EncryptionLevel.None);
});
GraphClient = new BoltGraphClient(driver);
await GraphClient.ConnectAsync();
}
catch (ServiceUnavailableException)
{
return false;
}
catch (AuthenticationException)
{
return false;
}
catch (UriFormatException)
{
return false;
}
return true;
}

36
Xamarin.Neo4j/Xamarin.Neo4j/Xamarin.Neo4j/ViewModels/AddConnectionViewModel.cs
View File

@@ -43,8 +43,6 @@ namespace Xamarin.Neo4j.ViewModels
Commands.Add("Test", new Command(async () =>
{
if (!ValidateInput()) return;
var connectionString = BuildConnectionString();
var couldConnect = await _neo4jService.EstablishConnection(connectionString);
@@ -54,8 +52,6 @@ namespace Xamarin.Neo4j.ViewModels
Commands.Add("Save", new Command(async () =>
{
if (!ValidateInput()) return;
var connectionString = BuildConnectionString();
var namePromptResult = await UserDialogs.Instance.PromptAsync("How do you want to name this connection?", "Save Connection", "Save", "Cancel");
@@ -72,11 +68,15 @@ namespace Xamarin.Neo4j.ViewModels
Commands.Add("Connect", new Command(async () =>
{
if (!ValidateInput()) return;
var connectionString = BuildConnectionString();
await Navigation.PushAsync(new SessionPage(connectionString));
var couldConnect = await _neo4jService.EstablishConnection(connectionString);
if (couldConnect)
await Navigation.PushAsync(new SessionPage(connectionString));
else
await UserDialogs.Instance.AlertAsync( "Connection failed.");
}));
}
@@ -105,28 +105,6 @@ namespace Xamarin.Neo4j.ViewModels
};
}
private bool ValidateInput()
{
// Username and Password not checked because username- and passwordless connections are allowed
var ipRegex = new Regex(@"\b((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)(\.|$)){4}\b");
var portRegex = new Regex(@"^([0-9]{1,4}|[1-5][0-9]{4}|6[0-4][0-9]{3}|65[0-4][0-9]{2}|655[0-2][0-9]|6553[0-5])$");
if (!ipRegex.IsMatch(Host))
{
UserDialogs.Instance.AlertAsync("Incorrect host format");
return false;
}
if (!portRegex.IsMatch(Port.ToString()))
{
UserDialogs.Instance.AlertAsync("Incorrect port format");
return false;
}
return true;
}
#region Bindable Properties
public bool Encrypted