node_modules: update (#352)

Co-authored-by: dawidd6 <9713907+dawidd6@users.noreply.github.com>

node_modules/nodemailer/dist/esm/mail-composer/index.js

@@ -16,6 +16,40 @@ function isContentObject(value) {
     const content = value;
     return typeof value === 'object' && !!(content.content || content.path || content.href || content.raw);
 }
+/**
+ * Tells whether attachment content is a string or a Buffer that 7bit can describe: ASCII
+ * only, no NUL and no line over the 998 octets of RFC 5322. Anything else, a stream or a
+ * file path included, can not be checked here
+ */
+function fitsSevenBit(content) {
+    let at;
+    let length;
+    if (typeof content === 'string') {
+        at = i => content.charCodeAt(i);
+        length = content.length;
+    }
+    else if (Buffer.isBuffer(content)) {
+        at = i => content[i];
+        length = content.length;
+    }
+    else {
+        return false;
+    }
+    let lineLength = 0;
+    for (let i = 0; i < length; i++) {
+        const c = at(i);
+        if (c === 0 || c > 0x7f) {
+            return false;
+        }
+        if (c === 0x0a || c === 0x0d) {
+            lineLength = 0;
+        }
+        else if (++lineLength > 998) {
+            return false;
+        }
+    }
+    return true;
+}
 class MailComposer {
     constructor(mail) {
         this.mail = mail || {};
@@ -98,8 +132,11 @@ class MailComposer {
                 contentTransferEncoding = attachment.contentTransferEncoding;
             }
             else if (isMessageNode) {
-                // the content might include non-ASCII bytes but at this point we do not know it yet
-                contentTransferEncoding = '8bit';
+                // a message/* part can not be encoded (RFC 2046 5.2.1), so the label has to describe
+                // the content as it is. A stream or a file might hold non-ASCII bytes that can not be
+                // checked here, so only content at hand that fits 7bit is labelled as such
+                // content with an `encoding` is decoded later, so what it decodes to is not known here either
+                contentTransferEncoding = !attachment.encoding && fitsSevenBit(attachment.content) ? '7bit' : '8bit';
             }
             else {
                 contentTransferEncoding = 'base64'; // the default
@@ -114,9 +151,7 @@ class MailComposer {
             }
             else if (!isMessageNode && attachment.filename !== false) {
                 // a backslash separates as well, so a Windows path does not put the sender's directories in the headers
-                data.filename =
-                    (attachment.path || attachment.href || '').split(/[/\\]/).pop().split('?').shift() ||
-                        'attachment-' + (i + 1);
+                data.filename = (attachment.path || attachment.href || '').split(/[/\\]/).pop().split('?').shift() || 'attachment-' + (i + 1);
                 if (data.filename.indexOf('.') < 0) {
                     data.filename += '.' + mimeFuncs.detectExtension(data.contentType);
                 }
@@ -277,8 +312,7 @@ class MailComposer {
         if (this.mail.icalEvent) {
             eventObject = Object.assign({}, this._getIcalEvent());
             eventObject.filename = false;
-            eventObject.contentType =
-                'text/calendar; charset=utf-8; method=' + (eventObject.method || 'PUBLISH').toString().trim().toUpperCase();
+            eventObject.contentType = 'text/calendar; charset=utf-8; method=' + (eventObject.method || 'PUBLISH').toString().trim().toUpperCase();
             if (!eventObject.headers) {
                 eventObject.headers = {};
             }
@@ -306,8 +340,7 @@ class MailComposer {
                 alternative = this._processDataUrl(alternative);
             }
             const data = {
-                contentType: alternative.contentType ||
-                    mimeFuncs.detectMimeType(alternative.filename || alternative.path || alternative.href || 'txt'),
+                contentType: alternative.contentType || mimeFuncs.detectMimeType(alternative.filename || alternative.path || alternative.href || 'txt'),
                 contentTransferEncoding: alternative.contentTransferEncoding
             };
             if (alternative.filename) {