45 lines
1.3 KiB
JavaScript
45 lines
1.3 KiB
JavaScript
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function init(widget){
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inferSource(widget.src)
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}
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async function inferSource(src){
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response = await fetch(src, {
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method: 'HEAD'
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});
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if (!response.ok) {
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throw new Error(`HTTP error! status: ${response.status}`);
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}
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// 1. Get the Content-Disposition header value
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contentDisposition = response.headers.get('Content-Disposition');
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// 2. Process the value to extract the filename
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console.log(widget.src)
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widget.src = extractFilename(contentDisposition)
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console.log("detected: "+widget.src)
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}
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function extractFilename(contentDispositionHeader) {
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// Check for the preferred 'filename*' (UTF-8 encoded)
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// This looks for 'filename*=' followed by the encoding and the filename
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const utf8Match = contentDispositionHeader.match(/filename\*=(?:utf-8|UTF-8)''(.+?)(?:;|$)/i);
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if (utf8Match && utf8Match[1]) {
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// The filename might be URL-encoded, so decode it
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// The value in your example is 'website.jpg' which is not encoded,
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// but a proper implementation should decode.
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return decodeURIComponent(utf8Match[1].trim());
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}
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// Fallback to the simpler 'filename'
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const basicMatch = contentDispositionHeader.match(/filename="(.+?)"/i);
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if (basicMatch && basicMatch[1]) {
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return basicMatch[1].trim();
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}
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return null;
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}
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export { init };
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