private async Task OnResponseReceivedAsync(HttpResponseMessage response, Guid requestId)
{
if (response == null)
{
return;
}
var content = response.Content;
if (content != null && content.Headers.ContentType != null)
{
var contentType = content.Headers.ContentType;
var mediaTypeParts = contentType.MediaType.Split(new[] { '/' }, 2);
var mediaType = mediaTypeParts.Length > 0 ? mediaTypeParts[0].ToLowerInvariant() : null;
var mediaSubType = mediaTypeParts.Length > 1 ? mediaTypeParts[1].ToLowerInvariant() : null;
if (mediaType == "text" || (mediaType == "application" && (mediaSubType == "json" || mediaSubType == "xhtml+xml")))
{
var htmlContent = await response.Content.ReadAsStringAsync();
// raise TextResponseReceived event and allow subscribers to modify the response
var responseReceived = this.TextResponseReceivedRegistrationTokenTable.InvocationList;
if (responseReceived != null)
{
var eventArgs = new ResponseReceivedEventArgs(response.RequestMessage.RequestUri, contentType.MediaType, htmlContent);
Trace.Verbose(requestId, "Raising TextResponseReceived event for URI: {0}", response.RequestMessage.RequestUri);
await this.RunThroughDispatcherAsync(() => responseReceived(this, eventArgs));
htmlContent = eventArgs.Content;
}
if (mediaType == "text" || mediaType == "application")
{
if (mediaSubType == "html" || mediaSubType == "xhtml+xml")
{
var processor = new HtmlProcessor(htmlContent, this);
processor.RedirectLinks(response.RequestMessage.RequestUri);
if (response.Content.Headers.Contains(WebServer.CachedContentKey))
{
processor.AddOfflineClass();
}
// Inject preload scripts in HTML content
foreach (var preloadScript in this.PreloadScripts.OrderByDescending(p => p.Priority))
{
processor.InjectHtml(preloadScript.Script);
}
htmlContent = processor.GetContent();
}
else if (mediaSubType == "css")
{
htmlContent = Regex.Replace(
htmlContent,
@"(?<=url\((?<quote>['""])?)(?<url>[^'""]+?)(?=(\k<quote>)?\))",
(match) =>
{
var rewriteUri = this.BuildCurrentProxyUri(response.RequestMessage.RequestUri, match.Groups["url"].Value);
return(rewriteUri.ToString());
});
}
}
response.Content.Dispose();
response.Content = new StringContent(htmlContent);
response.Content.Headers.ContentType = contentType;
}
}
}
private async Task OnResponseReceivedAsync(HttpResponseMessage response, Guid requestId)
{
if (response == null)
{
return;
}
var content = response.Content;
if (content != null && content.Headers.ContentType != null)
{
var contentType = content.Headers.ContentType;
var mediaTypeParts = contentType.MediaType.Split(new[] { '/' }, 2);
var mediaType = mediaTypeParts.Length > 0 ? mediaTypeParts[0].ToLowerInvariant() : null;
var mediaSubType = mediaTypeParts.Length > 1 ? mediaTypeParts[1].ToLowerInvariant() : null;
if (mediaType == "text" || (mediaType == "application" && (mediaSubType == "json" || mediaSubType == "xhtml+xml")))
{
var htmlContent = await response.Content.ReadAsStringAsync();
// raise TextResponseReceived event and allow subscribers to modify the response
var responseReceived = this.TextResponseReceivedRegistrationTokenTable.InvocationList;
if (responseReceived != null)
{
var eventArgs = new ResponseReceivedEventArgs(response.RequestMessage.RequestUri, contentType.MediaType, htmlContent);
Trace.Verbose(requestId, "Raising TextResponseReceived event for URI: {0}", response.RequestMessage.RequestUri);
await this.RunThroughDispatcherAsync(() => responseReceived(this, eventArgs));
htmlContent = eventArgs.Content;
}
if (mediaType == "text" || mediaType == "application")
{
if (mediaSubType == "html" || mediaSubType == "xhtml+xml")
{
var processor = new HtmlProcessor(htmlContent, this);
processor.RedirectLinks(response.RequestMessage.RequestUri);
if (response.Content.Headers.Contains(WebServer.CachedContentKey))
{
processor.AddOfflineClass();
}
// Inject preload scripts in HTML content
foreach (var preloadScript in this.PreloadScripts.OrderByDescending(p => p.Priority))
{
processor.InjectHtml(preloadScript.Script);
}
htmlContent = processor.GetContent();
}
else if (mediaSubType == "css")
{
htmlContent = Regex.Replace(
htmlContent,
@"(?<=url\((?<quote>['""])?)(?<url>[^'""]+?)(?=(\k<quote>)?\))",
(match) =>
{
var rewriteUri = this.BuildCurrentProxyUri(response.RequestMessage.RequestUri, match.Groups["url"].Value);
return rewriteUri.ToString();
});
}
}
response.Content.Dispose();
response.Content = new StringContent(htmlContent);
response.Content.Headers.ContentType = contentType;
}
}
}