Flutter FTP连接插件 ftpconnect 的使用

概述

ftpconnect 是一个用于在Flutter应用中与FTP服务器进行交互的简单且强大的Dart库。它支持文件上传、下载、目录管理等功能，并且所有函数都是异步的。

主要功能

• 上传文件到FTP服务器
• 从FTP服务器下载文件/目录
• 列出FTP目录内容
• 管理FTP文件（重命名/删除）
• 完全异步操作

示例代码

1. 文件上传示例

示例1：使用 uploadFileWithRetry 方法

import 'dart:io';
import 'package:ftpconnect/ftpConnect.dart';

void main() async {
  FTPConnect ftpConnect = FTPConnect('example.com', user: 'user', pass: 'pass');
  File fileToUpload = File('fileToUpload.txt');
  
  try {
    await ftpConnect.connect();
    bool res = await ftpConnect.uploadFileWithRetry(fileToUpload, pRetryCount: 2);
    print(res ? "Upload successful" : "Upload failed");
  } catch (e) {
    print("Error during upload: ${e.toString()}");
  } finally {
    await ftpConnect.disconnect();
  }
}

示例2：逐步上传文件

import 'dart:io';
import 'package:ftpconnect/ftpConnect.dart';

void main() async {
  FTPConnect ftpConnect = FTPConnect('example.com', user: 'user', pass: 'pass');
  File fileToUpload = File('fileToUpload.txt');
  
  try {
    await ftpConnect.connect();
    await ftpConnect.uploadFile(fileToUpload);
    print("Upload successful");
  } catch (e) {
    print("Error during upload: ${e.toString()}");
  } finally {
    await ftpConnect.disconnect();
  }
}

2. 文件下载示例

示例1：使用 downloadFileWithRetry 方法

import 'dart:io';
import 'package:ftpconnect/ftpConnect.dart';

void main() async {
  FTPConnect ftpConnect = FTPConnect('example.com', user: 'user', pass: 'pass');
  String fileName = 'toDownload.txt';
  
  try {
    await ftpConnect.connect();
    bool res = await ftpConnect.downloadFileWithRetry(fileName, File('myFileFromFTP.txt'), pRetryCount: 2);
    print(res ? "Download successful" : "Download failed");
  } catch (e) {
    print("Error during download: ${e.toString()}");
  } finally {
    await ftpConnect.disconnect();
  }
}

示例2：逐步下载文件

import 'dart:io';
import 'package:ftpconnect/ftpConnect.dart';

void main() async {
  FTPConnect ftpConnect = FTPConnect('example.com', user: 'user', pass: 'pass');
  String fileName = 'toDownload.txt';
  
  try {
    await ftpConnect.connect();
    await ftpConnect.downloadFile(fileName, File('myFileFromFTP.txt'));
    print("Download successful");
  } catch (e) {
    print("Error during download: ${e.toString()}");
  } finally {
    await ftpConnect.disconnect();
  }
}

3. 其他功能示例

目录操作

import 'package:ftpconnect/ftpConnect.dart';

void main() async {
  FTPConnect ftpConnect = FTPConnect('example.com', user: 'user', pass: 'pass');
  
  try {
    await ftpConnect.connect();
    
    // 获取目录内容
    List<String> directoryContents = await ftpConnect.listDirectoryContent();
    print(directoryContents);
    
    // 创建新目录
    await ftpConnect.makeDirectory('newDir');
    
    // 改变当前目录
    await ftpConnect.changeDirectory('newDir');
    
    // 获取当前目录
    String currentDir = await ftpConnect.currentDirectory();
    print("Current Directory: $currentDir");
    
    // 删除目录
    await ftpConnect.deleteDirectory('newDir');
  } catch (e) {
    print("Error: ${e.toString()}");
  } finally {
    await ftpConnect.disconnect();
  }
}

文件操作

import 'package:ftpconnect/ftpConnect.dart';

void main() async {
  FTPConnect ftpConnect = FTPConnect('example.com', user: 'user', pass: 'pass');
  
  try {
    await ftpConnect.connect();
    
    // 重命名文件
    await ftpConnect.rename('test1.txt', 'test2.txt');
    
    // 获取文件大小
    int fileSize = await ftpConnect.sizeFile('test2.txt');
    print("File size: $fileSize bytes");
    
    // 检查文件是否存在
    bool fileExists = await ftpConnect.existFile('test2.txt');
    print("File exists: $fileExists");
    
    // 删除文件
    await ftpConnect.deleteFile('test2.txt');
  } catch (e) {
    print("Error: ${e.toString()}");
  } finally {
    await ftpConnect.disconnect();
  }
}

参数说明

更多详情请参考 官方文档。

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许可证

MIT许可证

以上是关于 ftpconnect 插件的基本介绍和示例代码，希望对您有所帮助！如果有任何问题，请随时提问。