github项目地址:https://github.com/fancaixia/upfile
- 上传当前小程序中下载过的文件
- 利用wx.chooseMessageFile 调用微信会话页面 选择要上传的文件
//选择要上传的上传文件
choosefilefun(){
let _that = this;
wx.chooseMessageFile({
count: 10,
type: 'file',
success(res) {
console.log(_that,' :this')
// console.log(res, " :res")
const tempFiles = res.tempFiles
let {upfilelist} = _that.data;
let newupfilelist = upfilelist.concat(tempFiles)
_that.setData({
upfilelist: newupfilelist,
})
}
})
},
sendFormData(fileindex){
let { upfilelist } = this.data;
if (upfilelist.length == 0){
wx.showToast({
title: '请选择要上传的文件',
})
return;
}
let $this = this;
wx.uploadFile({
url: serverAddress.url + '/upload', // 请求服务端文件,
filePath: upfilelist[fileindex].path,
name: upfilelist[fileindex].name,
header: {
"content-type": "multipart/form-data;charset=UTF-8",
},
formData: {},
success: function (res) {
let data = JSON.parse(res.data)
if(data.code == 1){
console.log('上传成功')
}
},
fail: function (res) {
console.log(res, " :失败res")
},
complete:function(res){
if (fileindex == upfilelist.length -1){
wx.showToast({
title: '上传成功',
})
$this.resetPage()
}else{
fileindex++;
$this.sendFormData(fileindex);
}
}
})
},
savefiles(e){
const fileName = e.currentTarget.dataset.name; //获取页面要下载的文件名
let $this = this;
wx.downloadFile({
url: serverAddress.url + '/' + fileName,
success:(res)=> {
var filePath = res.tempFilePath;
let manager = wx.getFileSystemManager(); //获取全局唯一的文件管理器
//判断目录是否存在
manager.access({
path: `${wx.env.USER_DATA_PATH}/download`,
success: (res) => {
// console.log('已存在path对应目录',res)
//保存文件之前查看是否存在此文件
manager.access({
path: `${wx.env.USER_DATA_PATH}/download/${fileName}`,
success(res){
// console.log('已存在此文件', res);
return false;
},
fail(err){
console.log('不存在此文件')
manager.saveFile({
tempFilePath: filePath, //filePath为保存到本地的临时路径
filePath: `${wx.env.USER_DATA_PATH}/download/${fileName}`,
success: (res) => {
$this.getLocalFiles(manager, $this)
},
fail: (err) => {
console.log(err)
}
})
}
})
},
fail: (err) => {
// console.log(err, '不存在path对应目录')
//创建保存文件的目录
manager.mkdir({
dirPath: `${wx.env.USER_DATA_PATH}/download`,
recursive: false,
success: (res) => {
//将临时文件保存到目录 /download
manager.saveFile({
tempFilePath: filePath,
filePath: `${wx.env.USER_DATA_PATH}/download/${fileName}`,
success: (res) => {
// console.log(res)
$this.getLocalFiles(manager, $this)
},
fail: (err) => {
console.log(err)
}
})
},
fail: (err) => {
console.log(err,)
}
})
}
})
},
fail:(err)=>{
console.log(err, "下载失败")
}
})
},
openfile(e){
let path = e.currentTarget.dataset.path;
wx.openDocument({
filePath: path,
success:(res)=>{
console.log('读取成功',res)
},
fail:(err)=>{
console.log('读取失败',err)
}
})
},
项目启动
wx_static 目录为小程序项目
[1] cd / wx_static
[2] 修改config.js 中的 ip地址
node 服务端
[1] cd / node
[2] cnpm install (安装依赖)
[3] nodemon app
文件上传后 返回下载列表若是不显示,可重新编译小程序