Created
August 17, 2018 14:30
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Azure CDN Image Tag Helper Error Handling
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//Retrieve any existing onerror handler code | |
var onError = output.Attributes[OnErrorAttributeName] ? .Value as string; | |
//Check if there's a fallback source and no onerror handler | |
if (!string.IsNullOrWhiteSpace(FallbackSrc) && string.IsNullOrWhiteSpace(onError)) { | |
string resolvedUrl; | |
if (TryResolveUrl(FallbackSrc, out resolvedUrl)) { | |
FallbackSrc = resolvedUrl; | |
} | |
if (AppendVersion) { | |
FallbackSrc = _fileVersionProvider.AddFileVersionToPath(FallbackSrc); | |
} | |
//Apply fallback handler code | |
onError = $ "this.src='{FallbackSrc}';console.log('{Src} NOT FOUND.')"; | |
output.Attributes.SetAttribute(OnErrorAttributeName, onError); | |
} |
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