this._headers.forEach(function(header) {
var key = header.key,
value = header.value,
structured;
switch (header.key) {
case 'Content-Disposition':
structured = libmime.parseHeaderValue(value);
if (_self.filename) {
structured.params.filename = _self.filename;
}
value = libmime.buildHeaderValue(structured);
break;
case 'Content-Type':
structured = libmime.parseHeaderValue(value);
_self._handleContentType(structured);
if (structured.value.match(/^text\/plain\b/) && typeof _self.content === 'string') {
if (_self._canUseFlowedContent) {
structured.params.format = 'flowed';
}
if (/[\u0080-\uFFFF]/.test(_self.content)) {
structured.params.charset = 'utf-8';
}
}
_self._isFlowedContent = String(structured.params.format).toLowerCase().trim() === 'flowed';
value = libmime.buildHeaderValue(structured);
break;
case 'Bcc':
if (!_self.keepBcc) {
// skip BCC values
return;
}
break;
}
// skip empty lines
value = _self._encodeHeaderValue(key, value);
if (!(value || '').toString().trim()) {
return;
}
headers.push(libmime.foldLines(key + ': ' + value, 76));
});
this._headers.forEach(function (header) {
var key = header.key;
var value = header.value;
var structured;
var param;
var options = {};
var formattedHeaders = ['From', 'Sender', 'To', 'Cc', 'Bcc', 'Reply-To', 'Date', 'References'];
if (value && formattedHeaders.indexOf(key) < 0 && typeof value === 'object') {
Object.keys(value).forEach(function (key) {
if (key !== 'value') {
options[key] = value[key];
}
});
value = (value.value || '').toString();
if (!value.trim()) {
return;
}
}
if (options.prepared) {
// header value is
headers.push(key + ': ' + value);
return;
}
switch (header.key) {
case 'Content-Disposition':
structured = libmime.parseHeaderValue(value);
if (_self.filename) {
structured.params.filename = _self.filename;
}
value = libmime.buildHeaderValue(structured);
break;
case 'Content-Type':
structured = libmime.parseHeaderValue(value);
_self._handleContentType(structured);
if (structured.value.match(/^text\/plain\b/) && typeof _self.content === 'string' && /[\u0080-\uFFFF]/.test(_self.content)) {
structured.params.charset = 'utf-8';
}
value = libmime.buildHeaderValue(structured);
if (_self.filename) {
// add support for non-compliant clients like QQ webmail
// we can't build the value with buildHeaderValue as the value is non standard and
// would be converted to parameter continuation encoding that we do not want
param = libmime.encodeWords(_self.filename, 'Q', 52);
if (param !== _self.filename || /[\s"=;]/.test(param)) {
// include value in quotes if needed
param = '"' + param + '"';
}
value += '; name=' + param;
}
break;
case 'Bcc':
if (!_self.keepBcc) {
// skip BCC values
return;
}
break;
}
value = _self._encodeHeaderValue(key, value);
// skip empty lines
if (!(value || '').toString().trim()) {
return;
}
headers.push(libmime.foldLines(key + ': ' + value, 76));
});