public async Task <DirectlineConversation> ReconnectConversationAsync(DirectlineToken token, string conversationId, string watermark = null)
{
using (var client = CreateDirectlineHttpClient(token))
{
string url;
if (string.IsNullOrEmpty(watermark))
{
url = $"/v3/directline/conversations/{conversationId}";
}
else
{
url = $"/v3/directline/conversations/{conversationId}?watermark={watermark}";
}
var response = await client
.GetAsync(url)
.ConfigureAwait(false);
response.EnsureSuccessStatusCode();
var contentBody = await response.Content
.ReadAsStringAsync()
.ConfigureAwait(false);
var rawTokenWrapper = JsonConvert.DeserializeObject <RawDirectlineTokenObject>(contentBody);
return(new DirectlineConversation(new Uri(rawTokenWrapper.StreamUrl)));
}
}
private HttpClient CreateDirectlineHttpClient(DirectlineToken token = null)
{
var client =
new HttpClient
{
BaseAddress = new Uri("https://directline.botframework.com")
};
if (token != null)
{
client.DefaultRequestHeaders.Authorization =
new AuthenticationHeaderValue("Bearer", token.RawToken);
}
return(client);
}
public async Task <DirectlineConversation> StartConversationAsync(DirectlineToken token)
{
using (var client = CreateDirectlineHttpClient(token))
{
var response = await client
.PostAsync("/v3/directline/conversations", null)
.ConfigureAwait(false);
response.EnsureSuccessStatusCode();
var contentBody = await response.Content
.ReadAsStringAsync()
.ConfigureAwait(false);
var rawTokenWrapper = JsonConvert.DeserializeObject <RawDirectlineTokenObject>(contentBody);
return(new DirectlineConversation(new Uri(rawTokenWrapper.StreamUrl)));
}
}
// TODO: Write API client functions for talking to DL v3
// TODO: We will need a conversation token for all methods used by this class
// TODO: The conversation token will be retrieved from an endpoint on our server
public async Task <DirectlineToken> RefreshTokenAsync(DirectlineToken token)
{
using (var client = CreateDirectlineHttpClient(token))
{
var response = await client
.PostAsync("/v3/directline/tokens/refresh", null)
.ConfigureAwait(false);
response.EnsureSuccessStatusCode();
var contentBody = await response.Content
.ReadAsStringAsync()
.ConfigureAwait(false);
var rawTokenWrapper = JsonConvert.DeserializeObject <RawDirectlineTokenObject>(contentBody);
return(new DirectlineToken(rawTokenWrapper.Token, rawTokenWrapper.ExpiresIn));
}
}
private bool ShouldRefreshToken(DirectlineToken token)
{
return((token.ExpiryUtc - DateTime.UtcNow) < TimeSpan.FromMinutes(4));
}