Network

• Example

Usage

To use this plugin, add network as a dependency in your pubspec.yaml file.

dependencies:
  network: 
    git:
      url: https://github.com/flutter-packagist/network.git

Supported methods

• x GET
• x POST
• x PUT
• x DELETE
• x PATCH
• x HEAD
• x DOWNLOAD

Example

Initialization

HttpRequest().init(HttpRequestSetting(
  baseUrl: EnvConfig.host,
  interceptors: [
    RetryOnConnectionChangeInterceptor(),
    DioLogInterceptor(),
    CancelTokenInterceptor(),
  ],
));

GET

await HttpRequest().get(
  'get',
  onSuccess: (data) {
    showToast("请求成功: ${data.toString()}");
  },
  onFailed: (code, DioException? error) {
    logE('code: $code, msg: $error');
  },
);

POST

await HttpRequest().post(
  'post',
  onSuccess: (data) {
    showToast("请求成功: ${data.toString()}");
  },
  onFailed: (code, DioException? error) {
    logE('code: $code, msg: $error');
  },
);

PUT

await HttpRequest().put(
  'put',
  onSuccess: (data) {
    showToast("请求成功: ${data.toString()}");
  },
  onFailed: (code, DioException? error) {
    logE('code: $code, msg: $error');
  },
);

DELETE

await HttpRequest().delete(
  'delete',
  onSuccess: (data) {
    showToast("请求成功: ${data.toString()}");
  },
  onFailed: (code, DioException? error) {
    logE('code: $code, msg: $error');
  },
);

PATCH

await HttpRequest().patch(
  'patch',
  onSuccess: (data) {
    showToast("请求成功: ${data.toString()}");
  },
  onFailed: (code, DioException? error) {
    logE('code: $code, msg: $error');
  },
);

HEAD

await HttpRequest().head(
  'head',
  onSuccess: (data) {
    showToast("请求成功: ${data.toString()}");
  },
  onFailed: (code, DioException? error) {
    logE('code: $code, msg: $error');
  },
);

DOWNLOAD

await HttpRequest().download(
  url,
  '${(await getTemporaryDirectory()).path}/test.jpg',
  onReceiveProgress: (count, total) {
    logD('进度：$count / $total');
  },
  onSuccess: (data) {
    showToast("下载完成");
  },
  onFailed: (code, error) {
    logE('code: $code, msg: $error');
  },
);

on Web, you can use download(url) to download file. Such as:

/// 下载链接内容
static void download(String url) {
  html.AnchorElement anchorElement = html.AnchorElement(href: url);
  anchorElement.download = url;
  anchorElement.click();
}

UPLOAD

Picker File

MultipartFile? multipartFile;
if (GetPlatform.isWeb) {
  FilePickerResult? result = await FilePicker.platform.pickFiles();
  Uint8List? fileBytes = result!.files.first.bytes;
  String fileName = result.files.first.name;
  if (fileBytes == null) {
    showToast("文件为空");
    return;
  }
  multipartFile = MultipartFile.fromBytes(
    fileBytes,
    filename: fileName,
  );
} else {
  FilePickerResult? result = await FilePicker.platform.pickFiles();
  if (result?.files.single.path == null) {
    showToast("文件为空");
    return;
  }
  showToast("文件路径: ${result!.files.single.path}");
  multipartFile = await MultipartFile.fromFile(result.files.single.path!);
}

Upload File

await HttpRequest().post(
  'upload',
  formData: {'file': multipartFile},
  onSuccess: (data) {},
  onFailed: (code, msg) {},
  onSendProgress: (count, total) {
    logD('进度：$count / $total');
  },
);

Interceptor

• RetryOnConnectionChangeInterceptor: Retry when network connection change
• DioLogInterceptor: Log interceptor
• CancelTokenInterceptor: when sending a request, it will auto create a cancelToken then add it to CancelTokenPool. And remove cancelToken from CancelTokenPool, after request was finished or canceled.

Custom Interceptor

class CustomInterceptor extends Interceptor {
  @override
  void onRequest(RequestOptions options, RequestInterceptorHandler handler) {
    super.onRequest(options, handler);
    
  }

  @override
  void onResponse(Response response, ResponseInterceptorHandler handler) {
    super.onResponse(response, handler);
    
  }

  @override
  void onError(DioException err, ErrorInterceptorHandler handler) {
    super.onError(err, handler);
    
  }
}

Add Interceptor

HttpRequest().init(HttpRequestSetting(
  baseUrl: EnvConfig.host,
  interceptors: [
    ...
    CustomInterceptor(),
  ],
));

Cancel Request

Cancel Token

final cancelToken = CancelToken();
await HttpRequest().get(
  'get',
  cancelToken: cancelToken,
);

cancelToken.cancel();

Binding Controller

If you want to cancel network request when the controller was disposed, you can use CancelTokenPool().cancel(this) to cancel it. And bind the request to the controller.

class NetworkController extends BaseController<NetworkModel> {
  @override
  NetworkModel model = NetworkModel();
  
  @override
  onReady() {
    super.onReady();
    get();
  }

  @override
  void onClose() {
    // 取消当前控制器绑定的网络请求
    CancelTokenPool().cancel(this);
    super.onClose();
  }
  
  void get() {
    HttpRequest().get(
      'get',
      bind: this,
    );
  }
}

Remember to add CancelTokenInterceptor() to interceptors when you init HttpRequest.

HttpRequest().init(HttpRequestSetting(
  baseUrl: EnvConfig.host,
  interceptors: [
    ...
    CancelTokenInterceptor(),
  ],
));

Safe Convert

• toInt(value, {int defaultValue = 0})
• toDouble(value, {double defaultValue = 0.0})
• toBool(value, {bool defaultValue = false})
• toString(value, {String defaultValue = ""})
• toMap(value, {Map<String, dynamic>? defaultValue})
• toList(value, {List? defaultValue})
• asInt(Map<String, dynamic>? json, String key, {int defaultValue = 0})
• asDouble(Map<String, dynamic>? json, String key, {double defaultValue = 0.0})
• asBool(Map<String, dynamic>? json, String key, {bool defaultValue = false})
• asString(Map<String, dynamic>? json, String key, {String defaultValue = ""})
• asMap(Map<String, dynamic>? json, String key, {Map<String, dynamic>? defaultValue})
• asList(Map<String, dynamic>? json, String key, {List? defaultValue})

Example

test("convert dynamic to safe type", () {
  Object? a;
  print(a.runtimeType); // print: Null
  print(toInt(a).runtimeType); // print: int
  print(toInt(a)); // print: 0
});

test("convert from json key to safe type", () {
  final json = {
    'int': 1,
    'double': 1.0,
    'bool': true,
    'string': 'string',
    'map': {'key': 'value'},
    'list': ["1", "2", "3"],
  };

  print(asInt(json, 'int')); // print: 1
  print(asDouble(json, 'double')); // print: 1.0
  print(asBool(json, 'bool')); // print: true
  print(asString(json, 'string')); // print: string
  print(asMap(json, 'map')); // print: {key: value}
  print(asList(json, 'list').map((e) => toString(e)).toList()); // print [1, 2, 3]

  print("\n");
  print(asMap(json, 'int')); // print: {}
  print(asMap(json, 'double')); // print: {}
  print(asMap(json, 'bool')); // print: {}
  print(asMap(json, 'string')); // print: {}
  print(asMap(json, 'map')); // print: {}
  print(asMap(json, 'list')); // print: {}

  print("\n");
  print(asList(json, 'map').map((e) => toString(e)).toList()); // print []
});