async Task <IWopiDiscoveryDocument> IWopiDiscoveryDocumentRepository.GetAsync(CancellationToken cancellationToken)
{
cancellationToken.ThrowIfCancellationRequested();
var clientDiscoveryDocumentUrl = _wopiConfiguration.ClientDiscoveryDocumentUrl;
Debug.Assert(clientDiscoveryDocumentUrl is not null);
var httpClient = _httpClientFactory.CreateClient("wopi-discovery-document");
using var httpRequestMessage = new HttpRequestMessage(HttpMethod.Get, clientDiscoveryDocumentUrl);
var xmlMediaTypes = new[] { "application/xml", "text/xml" };
var accepts = xmlMediaTypes.Aggregate(string.Empty, (acc, n) => string.Concat(acc, n, ", "))[0..^ 2];
httpRequestMessage.Headers.Add("Accept", accepts);
try
{
using var response = await httpClient.SendAsync(httpRequestMessage, cancellationToken);
if (!response.IsSuccessStatusCode)
{
return(WopiDiscoveryDocument.Empty);
}
var httpContent = response.Content;
if (httpContent is null)
{
return(WopiDiscoveryDocument.Empty);
}
using var strm = await httpContent.ReadAsStreamAsync(cancellationToken);
var xml = await XDocument.LoadAsync(strm, LoadOptions.None, cancellationToken);
if (WopiDiscoveryDocument.IsXmlDocumentSupported(xml))
{
return(new WopiDiscoveryDocument(clientDiscoveryDocumentUrl, xml, _logger));
}
}
catch (HttpRequestException ex)
{
_logger?.LogError(ex, "Failed to connect to the WOPI Client to download the discovery document");
}
return(WopiDiscoveryDocument.Empty);
}
async Task <IWopiDiscoveryDocument> IWopiDiscoveryDocumentRepository.GetAsync(CancellationToken cancellationToken)
{
cancellationToken.ThrowIfCancellationRequested();
var ClientDiscoveryDocumentUrl = _wopiConfiguration.ClientDiscoveryDocumentUrl;
if (string.IsNullOrWhiteSpace(ClientDiscoveryDocumentUrl))
{
return(WopiDiscoveryDocument.Empty);
}
if (!Uri.IsWellFormedUriString(ClientDiscoveryDocumentUrl, UriKind.Absolute))
{
return(WopiDiscoveryDocument.Empty);
}
var discoveryDocumentUrl = new Uri(ClientDiscoveryDocumentUrl, UriKind.Absolute);
var httpClient = _httpClientFactory.CreateClient("wopi-discovery-document");
using var request = new HttpRequestMessage(HttpMethod.Get, discoveryDocumentUrl);
var xmlMediaTypes = new[] { "application/xml", "text/xml" };
var accepts = xmlMediaTypes.Aggregate(string.Empty, (acc, n) => string.Concat(acc, n, ", "))[0..^ 2];
request.Headers.Add("Accept", accepts);
try
{
using var response = await httpClient.SendAsync(request, cancellationToken);
if (!response.IsSuccessStatusCode)
{
return(WopiDiscoveryDocument.Empty);
}
var contentType = response.Content?.Headers.ContentType.MediaType.Trim();
if (string.IsNullOrWhiteSpace(contentType))
{
return(WopiDiscoveryDocument.Empty);
}
if (!accepts.Contains(contentType, StringComparison.OrdinalIgnoreCase))
{
return(WopiDiscoveryDocument.Empty);
}
var httpContent = response.Content;
if (httpContent is null)
{
return(WopiDiscoveryDocument.Empty);
}
using var strm = await httpContent.ReadAsStreamAsync();
var xml = await XDocument.LoadAsync(strm, LoadOptions.None, cancellationToken);
if (WopiDiscoveryDocument.IsXmlDocumentSupported(xml))
{
return(new WopiDiscoveryDocument(discoveryDocumentUrl, xml, _logger));
}
}
catch (HttpRequestException ex)
{
_logger?.LogError(ex, "Failed to connect to the WOPI Client to download the discovery document");
}
return(WopiDiscoveryDocument.Empty);
}