getUnionId static method

Future<TencentUnionidResp> getUnionId({ required String accessToken, String unionid = '1', })

UnionID https://wiki.connect.qq.com/unionid%E4%BB%8B%E7%BB%8D

Implementation

static Future<TencentUnionidResp> getUnionId({
  required String accessToken,
  String unionid = '1',
}) {
  return HttpClient()
      .getUrl(Uri.parse(
          'https://graph.qq.com/oauth2.0/me?access_token=$accessToken&unionid=$unionid'))
      .then((HttpClientRequest request) {
    return request.close();
  }).then((HttpClientResponse response) async {
    if (response.statusCode == HttpStatus.ok) {
      final ContentType? contentType = response.headers.contentType;
      final Encoding encoding =
          Encoding.getByName(contentType?.charset) ?? utf8;
      final String callback = await encoding.decodeStream(response);
      // 腾讯有毒 callback( $json );
      final RegExp exp = RegExp(r'callback\( (.*) \)\;');
      final Match? match = exp.firstMatch(callback);
      if (match?.groupCount == 1) {
        final String? content = match!.group(1);
        if (content != null) {
          return TencentUnionidResp.fromJson(
              json.decode(content) as Map<String, dynamic>);
        }
      }
    }
    throw HttpException(
        'HttpResponse statusCode: ${response.statusCode}, reasonPhrase: ${response.reasonPhrase}.');
  });
}