98 lines
2.8 KiB
JavaScript
Executable file
98 lines
2.8 KiB
JavaScript
Executable file
var readFile = require('fs').readFile,
|
|
basename = require('path').basename;
|
|
|
|
exports.build = function(data, boundary, callback) {
|
|
|
|
if (typeof data != 'object' || typeof data.pipe == 'function')
|
|
return callback(new Error('Multipart builder expects data as key/val object.'));
|
|
|
|
var body = '',
|
|
object = flatten(data),
|
|
count = Object.keys(object).length;
|
|
|
|
if (count === 0)
|
|
return callback(new Error('Empty multipart body. Invalid data.'))
|
|
|
|
function done(err, section) {
|
|
if (err) return callback(err);
|
|
if (section) body += section;
|
|
--count || callback(null, body + '--' + boundary + '--');
|
|
};
|
|
|
|
for (var key in object) {
|
|
var value = object[key];
|
|
if (value === null || typeof value == 'undefined') {
|
|
done();
|
|
} else if (Buffer.isBuffer(value)) {
|
|
var part = { buffer: value, content_type: 'application/octet-stream' };
|
|
generate_part(key, part, boundary, done);
|
|
} else {
|
|
var part = (value.buffer || value.file || value.content_type) ? value : { value: value };
|
|
generate_part(key, part, boundary, done);
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
function generate_part(name, part, boundary, callback) {
|
|
|
|
var return_part = '--' + boundary + '\r\n';
|
|
return_part += 'Content-Disposition: form-data; name="' + name + '"';
|
|
|
|
function append(data, filename) {
|
|
|
|
if (data) {
|
|
var binary = part.content_type.indexOf('text') == -1;
|
|
return_part += '; filename="' + encodeURIComponent(filename) + '"\r\n';
|
|
if (binary) return_part += 'Content-Transfer-Encoding: binary\r\n';
|
|
return_part += 'Content-Type: ' + part.content_type + '\r\n\r\n';
|
|
return_part += binary ? data.toString('binary') : data.toString('utf8');
|
|
}
|
|
|
|
callback(null, return_part + '\r\n');
|
|
};
|
|
|
|
if ((part.file || part.buffer) && part.content_type) {
|
|
|
|
var filename = part.filename ? part.filename : part.file ? basename(part.file) : name;
|
|
if (part.buffer) return append(part.buffer, filename);
|
|
|
|
readFile(part.file, function(err, data) {
|
|
if (err) return callback(err);
|
|
append(data, filename);
|
|
});
|
|
|
|
} else {
|
|
|
|
if (typeof part.value == 'object')
|
|
return callback(new Error('Object received for ' + name + ', expected string.'))
|
|
|
|
if (part.content_type) {
|
|
return_part += '\r\n';
|
|
return_part += 'Content-Type: ' + part.content_type;
|
|
}
|
|
|
|
return_part += '\r\n\r\n';
|
|
return_part += Buffer.from(String(part.value), 'utf8').toString('binary');
|
|
append();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
// flattens nested objects for multipart body
|
|
function flatten(object, into, prefix) {
|
|
into = into || {};
|
|
|
|
for(var key in object) {
|
|
var prefix_key = prefix ? prefix + '[' + key + ']' : key;
|
|
var prop = object[key];
|
|
|
|
if (prop && typeof prop === 'object' && !(prop.buffer || prop.file || prop.content_type))
|
|
flatten(prop, into, prefix_key)
|
|
else
|
|
into[prefix_key] = prop;
|
|
}
|
|
|
|
return into;
|
|
}
|