/// <summary>
/// Retrieves a contact with some user supplied identifier.
/// </summary>
/// <param name="identifier">The user-supplied identifier for the contact.</param>
/// <param name="cancellationToken">A cancellation token.</param>
/// <returns>
/// A task whose result is the contact, or null if no match is found.
/// </returns>
public override async Task<Endpoint> LookupAsync(string identifier, CancellationToken cancellationToken = default(CancellationToken))
{
if (string.IsNullOrEmpty(identifier))
{
return null;
}
Verify.Operation(this.AddressBookLookupUrl != null, "AddressBookLookupUrl not initialized");
var queryString = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
if (HashedEmailRegEx.IsMatch(identifier))
{
queryString["emailHash"] = identifier;
}
else if (EmailRegEx.IsMatch(identifier))
{
queryString["email"] = identifier;
}
else
{
return null;
}
var builder = new UriBuilder(this.AddressBookLookupUrl);
builder.Query = queryString.UrlEncode();
return await this.DownloadEndpointAsync(builder.Uri, cancellationToken).ConfigureAwait(false);
}
public void UrlEncode() {
var data = new Dictionary<string, string> { { "a", "b" }, { "a=b&c", "e=f&g" }, };
string urlEncoded = data.UrlEncode();
Assert.That(urlEncoded, Is.EqualTo("a=b&a%3Db%26c=e%3Df%26g"));
var decoded = HttpUtility.ParseQueryString(urlEncoded);
Assert.That(decoded.Count, Is.EqualTo(data.Count));
foreach (string key in decoded) {
Assert.That(data[key], Is.EqualTo(decoded[key]));
}
}
