forked from lix-project/lix-website
122 lines
3.3 KiB
JavaScript
122 lines
3.3 KiB
JavaScript
"use strict";
|
|
|
|
var Buffer = require("buffer").Buffer,
|
|
Transform = require("stream").Transform;
|
|
|
|
|
|
// == Exports ==================================================================
|
|
module.exports = function(iconv) {
|
|
|
|
// Additional Public API.
|
|
iconv.encodeStream = function encodeStream(encoding, options) {
|
|
return new IconvLiteEncoderStream(iconv.getEncoder(encoding, options), options);
|
|
}
|
|
|
|
iconv.decodeStream = function decodeStream(encoding, options) {
|
|
return new IconvLiteDecoderStream(iconv.getDecoder(encoding, options), options);
|
|
}
|
|
|
|
iconv.supportsStreams = true;
|
|
|
|
|
|
// Not published yet.
|
|
iconv.IconvLiteEncoderStream = IconvLiteEncoderStream;
|
|
iconv.IconvLiteDecoderStream = IconvLiteDecoderStream;
|
|
iconv._collect = IconvLiteDecoderStream.prototype.collect;
|
|
};
|
|
|
|
|
|
// == Encoder stream =======================================================
|
|
function IconvLiteEncoderStream(conv, options) {
|
|
this.conv = conv;
|
|
options = options || {};
|
|
options.decodeStrings = false; // We accept only strings, so we don't need to decode them.
|
|
Transform.call(this, options);
|
|
}
|
|
|
|
IconvLiteEncoderStream.prototype = Object.create(Transform.prototype, {
|
|
constructor: { value: IconvLiteEncoderStream }
|
|
});
|
|
|
|
IconvLiteEncoderStream.prototype._transform = function(chunk, encoding, done) {
|
|
if (typeof chunk != 'string')
|
|
return done(new Error("Iconv encoding stream needs strings as its input."));
|
|
try {
|
|
var res = this.conv.write(chunk);
|
|
if (res && res.length) this.push(res);
|
|
done();
|
|
}
|
|
catch (e) {
|
|
done(e);
|
|
}
|
|
}
|
|
|
|
IconvLiteEncoderStream.prototype._flush = function(done) {
|
|
try {
|
|
var res = this.conv.end();
|
|
if (res && res.length) this.push(res);
|
|
done();
|
|
}
|
|
catch (e) {
|
|
done(e);
|
|
}
|
|
}
|
|
|
|
IconvLiteEncoderStream.prototype.collect = function(cb) {
|
|
var chunks = [];
|
|
this.on('error', cb);
|
|
this.on('data', function(chunk) { chunks.push(chunk); });
|
|
this.on('end', function() {
|
|
cb(null, Buffer.concat(chunks));
|
|
});
|
|
return this;
|
|
}
|
|
|
|
|
|
// == Decoder stream =======================================================
|
|
function IconvLiteDecoderStream(conv, options) {
|
|
this.conv = conv;
|
|
options = options || {};
|
|
options.encoding = this.encoding = 'utf8'; // We output strings.
|
|
Transform.call(this, options);
|
|
}
|
|
|
|
IconvLiteDecoderStream.prototype = Object.create(Transform.prototype, {
|
|
constructor: { value: IconvLiteDecoderStream }
|
|
});
|
|
|
|
IconvLiteDecoderStream.prototype._transform = function(chunk, encoding, done) {
|
|
if (!Buffer.isBuffer(chunk))
|
|
return done(new Error("Iconv decoding stream needs buffers as its input."));
|
|
try {
|
|
var res = this.conv.write(chunk);
|
|
if (res && res.length) this.push(res, this.encoding);
|
|
done();
|
|
}
|
|
catch (e) {
|
|
done(e);
|
|
}
|
|
}
|
|
|
|
IconvLiteDecoderStream.prototype._flush = function(done) {
|
|
try {
|
|
var res = this.conv.end();
|
|
if (res && res.length) this.push(res, this.encoding);
|
|
done();
|
|
}
|
|
catch (e) {
|
|
done(e);
|
|
}
|
|
}
|
|
|
|
IconvLiteDecoderStream.prototype.collect = function(cb) {
|
|
var res = '';
|
|
this.on('error', cb);
|
|
this.on('data', function(chunk) { res += chunk; });
|
|
this.on('end', function() {
|
|
cb(null, res);
|
|
});
|
|
return this;
|
|
}
|
|
|