61 lines
2.0 KiB
TypeScript
61 lines
2.0 KiB
TypeScript
import { LoggerProxy as Logger } from 'n8n-workflow';
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/**
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* Extracts filename from Content-Disposition header
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* @param headers - Response headers object
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* @returns The extracted filename or null if not found
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*/
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export function getFileNameFromHeaders(headers?: { [key: string]: string }): string | null {
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const who = "Utils::getFileNameFromHeaders:: ";
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if (!headers) {
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Logger.debug(who + 'No headers provided');
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return null;
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}
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// Look for content-disposition header (case-insensitive)
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const contentDisposition = Object.keys(headers).find(key =>
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key.toLowerCase() === 'content-disposition'
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);
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if (!contentDisposition || !headers[contentDisposition]) {
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Logger.debug(who + 'Content-Disposition header not found');
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return null;
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}
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const headerValue = headers[contentDisposition];
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Logger.debug(who + 'Found Content-Disposition header', { headerValue });
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// Handle different filename formats in Content-Disposition header
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// Format 1: filename*=UTF-8''encoded-filename
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const utf8Match = headerValue.match(/filename\*=UTF-8''([^;]+)/i);
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if (utf8Match) {
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try {
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const decodedFilename = decodeURIComponent(utf8Match[1]);
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Logger.debug(who + 'Extracted filename from UTF-8 format', { filename: decodedFilename });
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return decodedFilename;
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} catch (error) {
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Logger.error(who + 'Failed to decode UTF-8 filename', { error, encodedFilename: utf8Match[1] });
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}
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}
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// Format 2: filename="quoted-filename"
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const quotedMatch = headerValue.match(/filename="([^"]+)"/i);
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if (quotedMatch) {
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Logger.debug(who + 'Extracted filename from quoted format', { filename: quotedMatch[1] });
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return quotedMatch[1];
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}
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// Format 3: filename=unquoted-filename
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const unquotedMatch = headerValue.match(/filename=([^;]+)/i);
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if (unquotedMatch) {
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const filename = unquotedMatch[1].trim();
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Logger.debug(who + 'Extracted filename from unquoted format', { filename });
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return filename;
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}
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Logger.debug(who + 'Could not extract filename from Content-Disposition header', { headerValue });
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return null;
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}
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