Flutter网络请求插件pf_dart_http的使用

pf_dart_http 是一个基于 dart:io 和 http 库的 Flutter 网络请求插件，它提供了更加简洁和易用的 API 来进行网络请求。以下是如何在 Flutter 项目中使用 pf_dart_http 的基本步骤和示例。

1. 添加依赖

首先，你需要在 pubspec.yaml 文件中添加 pf_dart_http 依赖：

dependencies:
  flutter:
    sdk: flutter
  pf_dart_http: ^1.0.0  # 请根据实际情况使用最新版本

然后运行 flutter pub get 来安装依赖。

2. 导入包

在你的 Dart 文件中导入 pf_dart_http：

import 'package:pf_dart_http/pf_dart_http.dart';

3. 发起网络请求

pf_dart_http 提供了多种请求方法，如 GET、POST、PUT、DELETE 等。以下是一些基本的使用示例。

GET 请求

void fetchData() async {
  final response = await PfDartHttp.get('https://jsonplaceholder.typicode.com/posts/1');
  
  if (response.statusCode == 200) {
    print('Response data: ${response.body}');
  } else {
    print('Request failed with status: ${response.statusCode}');
  }
}

POST 请求

void postData() async {
  final response = await PfDartHttp.post(
    'https://jsonplaceholder.typicode.com/posts',
    body: {
      'title': 'foo',
      'body': 'bar',
      'userId': 1,
    },
  );

  if (response.statusCode == 201) {
    print('Response data: ${response.body}');
  } else {
    print('Request failed with status: ${response.statusCode}');
  }
}

PUT 请求

void updateData() async {
  final response = await PfDartHttp.put(
    'https://jsonplaceholder.typicode.com/posts/1',
    body: {
      'id': 1,
      'title': 'foo',
      'body': 'bar',
      'userId': 1,
    },
  );

  if (response.statusCode == 200) {
    print('Response data: ${response.body}');
  } else {
    print('Request failed with status: ${response.statusCode}');
  }
}

DELETE 请求

void deleteData() async {
  final response = await PfDartHttp.delete('https://jsonplaceholder.typicode.com/posts/1');

  if (response.statusCode == 200) {
    print('Item deleted successfully');
  } else {
    print('Request failed with status: ${response.statusCode}');
  }
}

4. 处理请求头

你可以在请求中添加自定义的请求头：

void fetchDataWithHeaders() async {
  final response = await PfDartHttp.get(
    'https://jsonplaceholder.typicode.com/posts/1',
    headers: {
      'Authorization': 'Bearer your_token_here',
      'Content-Type': 'application/json',
    },
  );

  if (response.statusCode == 200) {
    print('Response data: ${response.body}');
  } else {
    print('Request failed with status: ${response.statusCode}');
  }
}

5. 处理错误

你可以使用 try-catch 来捕获请求过程中可能出现的异常：

void fetchDataWithErrorHandling() async {
  try {
    final response = await PfDartHttp.get('https://jsonplaceholder.typicode.com/invalid-endpoint');
    
    if (response.statusCode == 200) {
      print('Response data: ${response.body}');
    } else {
      print('Request failed with status: ${response.statusCode}');
    }
  } catch (e) {
    print('An error occurred: $e');
  }
}

6. 处理 JSON 数据

通常情况下，服务器返回的数据是 JSON 格式的。你可以使用 dart:convert 库来解析 JSON 数据：

import 'dart:convert';

void fetchAndParseJson() async {
  final response = await PfDartHttp.get('https://jsonplaceholder.typicode.com/posts/1');
  
  if (response.statusCode == 200) {
    final Map<String, dynamic> data = json.decode(response.body);
    print('Post title: ${data['title']}');
  } else {
    print('Request failed with status: ${response.statusCode}');
  }
}