fast_gbk 0.1.2

a fast gbk codec, support GBK encoding and decoding with stream api.

A GBK codec library for Dart developers.

GBK 编解码器，支持 File 和 HttpClient 的 Stream interface。用法和 utf8 codec完全一致。

Created from templates made available by Stagehand under a BSD-style license.

version

fast_gbk: 0.1.2

It is a initial version, which will pub to pub.dev when it is stable enough.

Usage

• A simple usage example:

import 'package:fast_gbk/fast_gbk.dart';
void main() async {
  var encoded = gbk.encode("白日依山尽，黄河入海流");
  var decoded = gbk.decode([176, 215, 200, 213, 210, 192, 201, 189, 190, 161, 163,
                            172, 187, 198, 186, 211, 200, 235, 186, 163, 193, 247]);
}

• Example: read a GBK file.

import 'dart:convert';
import 'dart:io';
import 'package:fast_gbk/fast_gbk.dart';
void main() {
  File gbkFile = File("gbkFile.txt");
  var stream = gbkFile.openRead();
  stream.transform(gbk.decoder)
      .transform(const LineSplitter())
      .listen((line) {
    stdout.writeln(line);
  });
}

• Example: write a GBK file.

import 'dart:io';
import 'package:fast_gbk/fast_gbk.dart';
void main() async {
  File output = File("gbk.txt");
  var stream = output.openWrite(encoding: gbk);
  stream.write("123");
  stream.writeln("456");
  stream.writeCharCode(0x41);
  await stream.close();
}

• Example: decode HttpClient response

import 'dart:io';
import 'package:fast_gbk/fast_gbk.dart';
void main() async {
  var gbkWebUrl = "http://www.newsmth.net/nForum/#!mainpage";
  var httpClient = HttpClient();
  HttpClientRequest request = await httpClient.getUrl(Uri.parse(gbkWebUrl));
  HttpClientResponse response = await request.close();
  var responseBody = await response.transform(gbk.decoder).join();
  print(responseBody);
  httpClient.close();
}

FAQ

Q: support for malformed gbk characters.

Q: when input string contains malformed GBK characters, we do not want to received a exception.

A: 0.1.1+1 export GbkCodec api, users can use as follows:

  //output a �, instead of throw a exception.
  var codec = GbkCodec(allowMalformed: true);
  var decodedMalform = codec.decode([20001]);

Features and bugs

Please feel free to post issue or pull request to this github link.