public BlogSettingsDetector(IBlogSettingsDetectionContext context)
{
// save the context
_context = context;
_homepageAccessor = new LazyHomepageDownloader(_context.HomepageUrl, new HttpRequestHandler(ExecuteHttpRequest));
}
public BlogSettingsDetector(IBlogSettingsDetectionContext context)
{
// save the context
_context = context;
_homepageAccessor = new LazyHomepageDownloader(_context.HomepageUrl, new HttpRequestHandler(ExecuteHttpRequest));
}
public static WriterEditingManifest FromHomepage(LazyHomepageDownloader homepageDownloader, Uri homepageUri, IBlogClient blogClient, IBlogCredentialsAccessor credentials)
{
if (homepageUri == null)
{
return(null);
}
WriterEditingManifest editingManifest = null;
try
{
// compute the "by-convention" url for the manifest
string homepageUrl = UrlHelper.InsureTrailingSlash(UrlHelper.SafeToAbsoluteUri(homepageUri));
string manifestUrl = UrlHelper.UrlCombine(homepageUrl, "wlwmanifest.xml");
// test to see whether this url exists and has a valid manifest
editingManifest = FromUrl(new Uri(manifestUrl), blogClient, credentials, false);
// if we still don't have one then scan homepage contents for a link tag
if (editingManifest == null)
{
string manifestLinkTagUrl = ScanHomepageContentsForManifestLink(homepageUri, homepageDownloader);
if (manifestLinkTagUrl != null)
{
// test to see whether this url exists and has a valid manifest
try
{
editingManifest = FromUrl(new Uri(manifestLinkTagUrl), blogClient, credentials, true);
}
catch (Exception ex)
{
Trace.WriteLine("Error attempting to download manifest from " + manifestLinkTagUrl + ": " + ex.ToString());
}
}
}
}
catch (Exception ex)
{
Trace.WriteLine("Unexpected exception attempting to discover manifest from " + UrlHelper.SafeToAbsoluteUri(homepageUri) + ": " + ex.ToString());
}
// return whatever editing manifest we found
return(editingManifest);
}
private static string ScanHomepageContentsForManifestLink(Uri homepageUri, LazyHomepageDownloader homepageDownloader)
{
if (homepageDownloader.HtmlDocument != null)
{
LightWeightTag[] linkTags = homepageDownloader.HtmlDocument.GetTagsByName(HTMLTokens.Link);
foreach (LightWeightTag linkTag in linkTags)
{
string rel = linkTag.BeginTag.GetAttributeValue("rel");
string href = linkTag.BeginTag.GetAttributeValue("href");
if (rel != null && (rel.Trim().ToUpperInvariant().Equals("WLWMANIFEST") && href != null))
{
return(UrlHelper.UrlCombineIfRelative(UrlHelper.SafeToAbsoluteUri(homepageUri), href));
}
}
}
// didn't find it
return(null);
}
public static WriterEditingManifest FromHomepage(LazyHomepageDownloader homepageDownloader, Uri homepageUri, IBlogClient blogClient, IBlogCredentialsAccessor credentials)
{
if (homepageUri == null)
return null;
WriterEditingManifest editingManifest = null;
try
{
// compute the "by-convention" url for the manifest
string homepageUrl = UrlHelper.InsureTrailingSlash(UrlHelper.SafeToAbsoluteUri(homepageUri));
string manifestUrl = UrlHelper.UrlCombine(homepageUrl, "wlwmanifest.xml");
// test to see whether this url exists and has a valid manifest
editingManifest = FromUrl(new Uri(manifestUrl), blogClient, credentials, false);
// if we still don't have one then scan homepage contents for a link tag
if (editingManifest == null)
{
string manifestLinkTagUrl = ScanHomepageContentsForManifestLink(homepageUri, homepageDownloader);
if (manifestLinkTagUrl != null)
{
// test to see whether this url exists and has a valid manifest
try
{
editingManifest = FromUrl(new Uri(manifestLinkTagUrl), blogClient, credentials, true);
}
catch (Exception ex)
{
Trace.WriteLine("Error attempting to download manifest from " + manifestLinkTagUrl + ": " + ex.ToString());
}
}
}
}
catch (Exception ex)
{
Trace.WriteLine("Unexpected exception attempting to discover manifest from " + UrlHelper.SafeToAbsoluteUri(homepageUri) + ": " + ex.ToString());
}
// return whatever editing manifest we found
return editingManifest;
}
private static string ScanHomepageContentsForManifestLink(Uri homepageUri, LazyHomepageDownloader homepageDownloader)
{
if (homepageDownloader.HtmlDocument != null)
{
LightWeightTag[] linkTags = homepageDownloader.HtmlDocument.GetTagsByName(HTMLTokens.Link);
foreach (LightWeightTag linkTag in linkTags)
{
string rel = linkTag.BeginTag.GetAttributeValue("rel");
string href = linkTag.BeginTag.GetAttributeValue("href");
if (rel != null && (rel.Trim().ToUpperInvariant().Equals("WLWMANIFEST") && href != null))
{
return UrlHelper.UrlCombineIfRelative(UrlHelper.SafeToAbsoluteUri(homepageUri), href);
}
}
}
// didn't find it
return null;
}