nodejs连接ftp上传下载

依赖

//ftp 模块是目前找到的还不错的，对于ftp的基本功能都支持
npm install ftp

连接ftp

const ftp = require('ftp');//连接FTP
const client = new ftp();
client.on('ready',()=>{
    console.log('ftp client is ready');
});
client.connect({
    host : '***.***.***.***',
    port : '****',
    user : '***',
    password : '***',
    keepalive : 1000
});

ftp 获取列表 list

//列出目标目录
function list(dirpath){
    return new Promise((resolve,reject)=>{
        client.list((err,files)=>{
            resolve({err : err,files : files});
        })
    });
}
async function test (){
    //list 列表功能
    let {err,files} = await list();
    if(err){
        console.log(err);
        return
    }
    console.log(`获得文件列表:`+files.length);
    console.log(files);
}
test();

ftp 目录切换

//切换目录
function cwd(dirpath){
    return new Promise((resolve,reject)=>{
        client.cwd(dirpath,(err,dir)=>{
            resolve({err : err,dir : dir});
        })
    });
}

FBI WARNING : 这里提醒下，在本示例中的所有代码都在同一个文件中，后面会给出完整示例代码。

有了目录切换，那么在list函数中的dirpath就可以使用啦。如下：

//列出目标目录
//列出目标目录
async function list(dirpath){
    let {err : ea,dir } = await cwd(dirpath);
    return new Promise((resolve,reject)=>{
        client.list((err,files)=>{
            resolve({err : err,files : files})
        })
    });
}

ftp下载文件

//下载文件
async function get(filePath){
    const dirpath = path.dirname(filePath);
    const fileName = path.basename(filePath);
    let {err : ea,dir} = await cwd(dirpath);
    return new Promise((resolve,reject)=>{
        client.get(fileName,(err,rs)=>{
            let ws = fs.createWriteStream(fileName);
            rs.pipe(ws);
            resolve({err : err});    
        });
    });
}

ftp上传文件

//将文件上传到ftp目标地址
async function put(currentFile,targetFilePath){
    const dirpath = path.dirname(targetFilePath);
    const fileName = path.basename(targetFilePath);
    const rs = fs.createReadStream(currentFile);
    let {err : ea,dir} = await cwd(dirpath);//此处应对err做处理
    if(ea){
        return Promise.resolve({err : ea});
    }
    return new Promise((resolve,reject)=>{
        client.put(rs,fileName,(err)=>{
            resolve({err : err});
        })
    });
}

完整代码

const ftp = require('ftp');//连接FTP
const path = require('path');
const client = new ftp();
const fs = require('fs');

client.on('ready',()=>{
    console.log('ftp client is ready');
});
client.on('close',()=>{
    console.log('ftp client has close')
});
client.on('end',()=>{
    console.log('ftp client has end')
});
client.on('error',(err)=>{
    console.log('ftp client has an error : '+ JSON.stringify(err))
});
client.connect({
    host : '***',//这个就不提供啦
    port : '***',
    user : '***',
    password : '***',
    keepalive : 1000
});
//列出目标目录
async function list(dirpath){
    let {err : ea,dir } = await cwd(dirpath);
    return new Promise((resolve,reject)=>{
        client.list((err,files)=>{
            resolve({err : err,files : files})
        })
    });
}
//切换目录
function cwd(dirpath){
    return new Promise((resolve,reject)=>{
        client.cwd(dirpath,(err,dir)=>{
            resolve({err : err,dir : dir});
        })
    });
}
//下载文件
async function get(filePath){
    const dirpath = path.dirname(filePath);
    const fileName = path.basename(filePath);
    let {err : ea,dir} = await cwd(dirpath);
    return new Promise((resolve,reject)=>{
        client.get(fileName,(err,rs)=>{
            let ws = fs.createWriteStream(fileName);
            rs.pipe(ws);
            resolve({err : err});    
        });
    });
}
//将文件上传到ftp目标地址
async function put(currentFile,targetFilePath){
    const dirpath = path.dirname(targetFilePath);
    const fileName = path.basename(targetFilePath);
    const rs = fs.createReadStream(currentFile);
    let {err : ea,dir} = await cwd(dirpath);//此处应对err做处理
    if(ea){
        return Promise.resolve({err : ea});
    }
    return new Promise((resolve,reject)=>{
        client.put(rs,fileName,(err)=>{
            resolve({err : err});
        })
    });
}
async function test (){
    //list 列表功能
    let {err,files} = await list('/attachment/byycampus/resource');
    if(err){
        console.log(err);
        return
    }
    console.log(`获得文件列表:`+files.length);
    console.log(files);

    //下载文件
    let {err : ea} = await get('/attachment/byycampus/resource/201812/14/201812141035222541381967.jpg');
    if(ea){
        console.log(ea);
        return;
    }
    console.log('文件下载成功')

    //文件上传
    let {err : eb} = await put('201812141035222541381967.jpg','/attachment/a.jpg');
    if(eb){
        console.log(eb);
        return;
    }
    console.log('文件上传成功')
}
test();