MimeNode.prototype._getStream = function (content) {
var contentStream;
if (typeof content.pipe === 'function') {
// assume as stream
return content;
} else if (content && typeof content.path === 'string' && !content.href) {
if (this.disableFileAccess) {
contentStream = new PassThrough();
setImmediate(function () {
contentStream.emit('error', new Error('File access rejected for ' + content.path));
});
return contentStream;
}
// read file
return fs.createReadStream(content.path);
} else if (content && typeof content.href === 'string') {
if (this.disableUrlAccess) {
contentStream = new PassThrough();
setImmediate(function () {
contentStream.emit('error', new Error('Url access rejected for ' + content.href));
});
return contentStream;
}
// fetch URL
return fetch(content.href);
} else {
// pass string or buffer content as a stream
contentStream = new PassThrough();
setImmediate(function () {
contentStream.end(content || '');
});
return contentStream;
}
};
module.exports.resolveContent = function (data, key, callback) {
var promise;
if (!callback && typeof Promise === 'function') {
promise = new Promise(function (resolve, reject) {
callback = module.exports.callbackPromise(resolve, reject);
});
}
var content = data && data[key] && data[key].content || data[key];
var contentStream;
var encoding = (typeof data[key] === 'object' && data[key].encoding || 'utf8')
.toString()
.toLowerCase()
.replace(/[-_\s]/g, '');
if (!content) {
return callback(null, content);
}
if (typeof content === 'object') {
if (typeof content.pipe === 'function') {
return resolveStream(content, function (err, value) {
if (err) {
return callback(err);
}
// we can't stream twice the same content, so we need
// to replace the stream object with the streaming result
data[key] = value;
callback(null, value);
});
} else if (/^https?:\/\//i.test(content.path || content.href)) {
contentStream = fetch(content.path || content.href);
return resolveStream(contentStream, callback);
} else if (/^data:/i.test(content.path || content.href)) {
var parts = (content.path || content.href).match(/^data:((?:[^;]*;)*(?:[^,]*)),(.*)$/i);
if (!parts) {
return callback(null, new Buffer(0));
}
return callback(null, /\bbase64$/i.test(parts[1]) ? new Buffer(parts[2], 'base64') : new Buffer(decodeURIComponent(parts[2])));
} else if (content.path) {
return resolveStream(fs.createReadStream(content.path), callback);
}
}
if (typeof data[key].content === 'string' && ['utf8', 'usascii', 'ascii'].indexOf(encoding) < 0) {
content = new Buffer(data[key].content, encoding);
}
// default action, return as is
setImmediate(callback.bind(null, null, content));
return promise;
};
MimeNode.prototype._getStream = function (content) {
var contentStream;
if (typeof content.pipe === 'function') {
// assume as stream
return content;
} else if (content && typeof content.path === 'string' && !content.href) {
// read file
return fs.createReadStream(content.path);
} else if (content && typeof content.href === 'string') {
// fetch URL
return fetch(content.href);
} else {
// pass string or buffer content as a stream
contentStream = new PassThrough();
setImmediate(function () {
contentStream.end(content || '');
});
return contentStream;
}
};