uniapp开发h5使用formdata上传文件_qq帝国的博客-爱代码爱编程
由于uniapp 的 uni.uploadFile 上传的限制，无法实现上传excel、world、ppt等类型的文件，不支持下图的上传方式，故只能调用原生的方法来解决。
解决方案
1、先创建一个原生上传的组件
<template>
<view class="lsj-file" :style="[getStyles]">
<view ref="lsj" class="hFile" :style="[getStyles]" @click="onClick">
<slot><view class="defview" :style="[getStyles]">上传</view></slot>
</view>
</view>
</template>
<script>
import {LsjFile} from './LsjFile.js'
export default {
name: 'Lsj-upload',
props: {
// 打印日志
debug: {type: Boolean,default: false},
// 自动上传
instantly: {type: Boolean,default: false},
// 上传接口参数设置
option: {type: Object,default: ()=>{}},
// 文件大小上限
size: { type: Number, default: 10 },
// 文件选择个数上限,超出后不触发点击
count: { type: Number, default: 9 },
// 允许上传的文件格式（多个以逗号隔开）
formats: { type: String, default:''},
// input file选择限制
accept: {type: String,default: ''},
// 微信选择文件类型
//all=从所有文件选择，
//video=只能选择视频文件，
//image=只能选择图片文件，
//file=可以选择除了图片和视频之外的其它的文件
wxFileType: { type: String, default: 'all' },
// webviewID需唯一，不同窗口也不要同Id
childId: { type: String, default: 'lsjUpload' },
// 文件选择触发面宽度
width: { type: String, default: '100%' },
// 文件选择触发面高度
height: { type: String, default: '80rpx' },
// top,left,bottom,right仅position=absolute时才需要传入
top: { type: [String, Number], default: '' },
left: { type: [String, Number], default: '' },
bottom: { type: [String, Number], default: '' },
right: { type: [String, Number], default: '' },
// nvue不支持跟随窗口滚动
position: {
type: String,
// #ifdef APP-NVUE
default: 'absolute',
// #endif
// #ifndef APP-NVUE
default: 'static',
// #endif
},
},
data() {
return {
}
},
watch: {
option(v) {
// #ifdef APP-PLUS
this.lsjFile&&this.show();
// #endif
}
},
updated() {
// #ifdef APP-PLUS
if (this.isShow) {
this.lsjFile&&this.show();
}
// #endif
},
computed: {
getStyles() {
let styles = {
width: this.width,
height: this.height
}
if (this.position == 'absolute') {
styles['top'] = this.top
styles['bottom'] = this.bottom
styles['left'] = this.left
styles['right'] = this.right
styles['position'] = 'fixed'
}
return styles
}
},
mounted() {
this._size = 0;
let WEBID = this.childId + new Date().getTime();
this.lsjFile = new LsjFile({
id: WEBID,
debug: this.debug,
width: this.width,
height: this.height,
option: this.option,
instantly: this.instantly,
// 限制条件
prohibited: {
// 大小
size: this.size,
// 允许上传的格式
formats: this.formats,
// 限制选择的格式
accept: this.accept,
count: this.count
},
onchange: this.onchange,
onprogress: this.onprogress,
});
this.create();
},
beforeDestroy() {
// #ifdef APP-PLUS
this.lsjFile.dom.close();
// #endif
},
methods: {
setFiles(array) {
if (array instanceof Map) {
for (let [key, item] of array) {
item['progress'] = 100;
item['type'] = 'success';
this.lsjFile.files.set(key,item);
}
}
else if (Array.isArray(array)) {
array.forEach(item=>{
if (item.name) {
item['progress'] = 100;
item['type'] = 'success';
this.lsjFile.files.set(item.name,item);
}
});
}
this.onchange(this.lsjFile.files);
},
setData() {
this.lsjFile&&this.lsjFile.setData(...arguments);
},
getDomStyles(callback) {
// #ifndef APP-NVUE
let view = uni
.createSelectorQuery()
.in(this)
.select('.lsj-file')
view.fields(
{
size: true,
rect: true
},
({ height, width, top, left, right, bottom }) => {
uni.createSelectorQuery()
.selectViewport()
.scrollOffset(({ scrollTop }) => {
return callback({
top: parseInt(top) + parseInt(scrollTop) + 'px',
left: parseInt(left) + 'px',
width: parseInt(width) + 'px',
height: parseInt(height) + 'px'
})
})
.exec()
}
).exec()
// #endif
// #ifdef APP-NVUE
const dom = weex.requireModule('dom')
dom.getComponentRect(this.$refs.lsj, ({ size: { height, width, top, left, right, bottom } }) => {
return callback({
top: parseInt(top) + 'px',
left: parseInt(left) + 'px',
width: parseInt(width) + 'px',
height: parseInt(height) + 'px',
right: parseInt(right) + 'px',
bottom: parseInt(bottom) + 'px'
})
})
// #endif
},
show() {
this.isShow = true;
// #ifdef APP-PLUS
this.lsjFile&&this.getDomStyles(styles => {
this.lsjFile.dom.setStyle(styles)
});
// #endif
// #ifdef H5
this.lsjFile.dom.style.display = 'inline'
// #endif
},
hide() {
this.isShow = false;
// #ifdef APP-PLUS
this.lsjFile&&this.lsjFile.dom.setStyle({
top: '-100px',
left:'0px',
width: '1px',
height: '100px',
});
// #endif
// #ifdef H5
this.lsjFile.dom.style.display = 'none'
// #endif
},
/**
* 手动提交上传
* @param {string}name 文件名称，不传则上传所有type等于waiting和fail的文件
*/
upload(name) {
this.lsjFile&&this.lsjFile.upload(name);
},
/**
* @returns {Map} 已选择的文件Map集
*/
onchange(files) {
this.$emit('change',files);
this._size = files.size;
return files.size >= this.count ? this.hide() : this.show();
},
/**
* @returns {object} 当前上传中的对象
*/
onprogress(item,end=false) {
this.$emit('progress',item);
if (end) {
setTimeout(()=>{
this.$emit('uploadEnd',item);
},0);
}
},
/**
* 移除组件内缓存的某条数据
* @param {string}name 文件名称,不指定默认清除所有文件
*/
clear(name) {
this.lsjFile.clear(name);
},
// 创建选择器
create() {
// 若iOS端服务端处理不了跨域就将hybrid目录内的html放到服务端去，并将此处path改成服务器上的地址
let path = '/uni_modules/lsj-upload/hybrid/html/uploadFile.html';
let dom = this.lsjFile.create(path);
// #ifdef H5
this.$refs.lsj.$el.appendChild(dom);
// #endif
// #ifndef APP-PLUS
this.show();
// #endif
// #ifdef APP-PLUS
dom.setStyle({position: this.position});
dom.loadURL(path);
setTimeout(()=>{
// #ifdef APP-NVUE
plus.webview.currentWebview().append(dom);
// #endif
// #ifndef APP-NVUE
this.$root.$scope.$getAppWebview().append(dom);
// #endif
this.show();
},300)
// #endif
},
// 点击选择附件
onClick() {
if (this._size >= this.count) {
this.toast(`只允许上传${this.count}个文件`);
return;
}
// #ifdef MP-WEIXIN
if (!this.isShow) {return;}
let count = this.count - this._size;
this.lsjFile.chooseMessageFile(this.wxFileType,count);
// #endif
},
toast(msg) {
uni.showToast({
title: msg,
icon: 'none'
});
}
}
}
</script>
<style scoped>
.lsj-file {
/* display: inline-block; */
}
.defview {
/* background-color: #007aff;
color: #fff;
border-radius: 10rpx;
display: flex;
align-items: center;
justify-content: center;
font-size: 28rpx; */
}
.hFile {
/* position: relative;
overflow: hidden; */
}
</style>
LsjFile.js
export class LsjFile {
constructor(data) {
this.dom = null;
// files.type = waiting;//（等待上传）|| loading（上传中）|| success（成功） || fail（失败）
this.files = new Map();
this.debug = data.debug || false;
this.id = data.id;
this.width = data.width;
this.height = data.height;
this.option = data.option;
this.instantly = data.instantly;
this.prohibited = data.prohibited;
this.onchange = data.onchange;
this.onprogress = data.onprogress;
this.uploadHandle = this._uploadHandle;
// #ifdef MP-WEIXIN
this.uploadHandle = this._uploadHandleWX;
// #endif
}
/**
* 创建File节点
* @param {string}path webview地址
*/
create(path) {
if (!this.dom) {
// #ifdef H5
let dom = document.createElement('input');
dom.type = 'file'
dom.value = ''
dom.style.height = this.height
dom.style.width = this.width
// dom.style.visibility = 'hidden'
dom.style.position = 'absolute'
dom.style.top = 0
dom.style.left = 0
dom.style.right = 0
dom.style.bottom = 0
dom.style.opacity = 0
dom.style.zIndex = 0
dom.accept = this.prohibited.accept;
if (this.prohibited.count > 1) {
dom.multiple = 'multiple';
}
dom.onchange = event => {
for (let file of event.target.files) {
this.addFile(file);
}
this.dom.value = '';
};
this.dom = dom;
// #endif
// #ifdef APP-PLUS
let styles = {
top: '-100px',
left: 0,
width: '1px',
height: '1px',
background: 'transparent'
};
let extras = {
debug: this.debug,
instantly: this.instantly,
prohibited: this.prohibited,
}
this.dom = plus.webview.create(path, this.id, styles,extras);
this.setData(this.option);
this._overrideUrlLoading();
// #endif
return this.dom;
}
}
copyObject(obj) {
if (typeof obj !== "undefined") {
return JSON.parse(JSON.stringify(obj));
} else {
return obj;
}
}
/**
* 自动根据字符串路径设置对象中的值 支持.和[]
* @param {Object} dataObj 数据源
* @param {String} name 支持a.b 和 a[b]
* @param {String} value 值
* setValue(dataObj, name, value);
*/
setValue(dataObj, name, value) {
// 通过正则表达式 查找路径数据
let dataValue;
if (typeof value === "object") {
dataValue = this.copyObject(value);
} else {
dataValue = value;
}
let regExp = new RegExp("([\\w$]+)|\\[(:\\d)\\]", "g");
const patten = name.match(regExp);
// 遍历路径 逐级查找 最后一级用于直接赋值
for (let i = 0; i < patten.length - 1; i++) {
let keyName = patten[i];
if (typeof dataObj[keyName] !== "object") dataObj[keyName] = {};
dataObj = dataObj[keyName];
}
// 最后一级
dataObj[patten[patten.length - 1]] = dataValue;
this.debug&&console.log('参数更新后',JSON.stringify(this.option));
}
/**
* 设置上传参数
* @param {object|string}name 上传参数,支持a.b 和 a[b]
*/
setData() {
let [name,value = ''] = arguments;
if (typeof name === 'object') {
Object.assign(this.option,name);
}
else {
this.setValue(this.option,name,value);
}
this.debug&&console.log(JSON.stringify(this.option));
// #ifdef APP-PLUS
this.dom.evalJS(`vm.setData('${JSON.stringify(this.option)}')`);
// #endif
}
/**
* 上传
* @param {string}name 文件名称
*/
async upload(name='') {
if (!this.option.url) {
throw Error('未设置上传地址');
}
// #ifndef APP-PLUS
console.log('has',this.files.has(name))
if (name && this.files.has(name)) {
await this.uploadHandle(this.files.get(name));
}
else {
for (let item of this.files.values()) {
if (item.type === 'waiting' || item.type === 'fail') {
await this.uploadHandle(item);
}
}
}
// #endif
// #ifdef APP-PLUS
this.dom&&this.dom.evalJS(`vm.upload('${name}')`);
// #endif
}
// 选择文件change
addFile(file) {
let name = file.name;
this.debug&&console.log('文件名称',name,'大小',file.size);
if (file) {
// 限制文件格式
let path = '';
let suffix = name.substring(name.lastIndexOf(".")+1).toLowerCase();
let formats = this.prohibited.formats.toLowerCase();
if (formats&&!formats.includes(suffix)) {
this.toast(`不支持上传${suffix.toUpperCase()}格式文件`);
return false;
}
// 限制文件大小
if (file.size > 1024 * 1024 * Math.abs(this.prohibited.size)) {
this.toast(`附件大小请勿超过${this.prohibited.size}M`)
return false;
}
// #ifndef MP-WEIXIN
path = URL.createObjectURL(file);
// #endif
// #ifdef MP-WEIXIN
path = file.path;
// #endif
this.files.set(file.name,{file,path,name: file.name,size: file.size,progress: 0,type: 'waiting'});
// #ifndef MP-WEIXIN
this.onchange(this.files);
this.instantly&&this.upload();
// #endif
// #ifdef MP-WEIXIN
return true;
// #endif
}
}
/**
* 移除文件
* @param {string}name 不传name默认移除所有文件，传入name移除指定name的文件
*/
clear(name='') {
// #ifdef APP-PLUS
this.dom&&this.dom.evalJS(`vm.clear('${name}')`);
// #endif
if (!name) {
this.files.clear();
}
else {
this.files.delete(name);
}
return this.onchange(this.files);
}
/**
* 提示框
* @param {string}msg 轻提示内容
*/
toast(msg) {
uni.showToast({
title: msg,
icon: 'none'
});
}
/**
* 微信小程序选择文件
* @param {number}count 可选择文件数量
*/
chooseMessageFile(type,count) {
wx.chooseMessageFile({
count: count,
type: type,
success: ({ tempFiles }) => {
for (let file of tempFiles) {
let next = this.addFile(file);
if (!next) {return}
}
this.onchange(this.files);
this.instantly&&this.upload();
},
fail: () => {
this.toast(`打开失败`);
}
})
}
_overrideUrlLoading() {
this.dom.overrideUrlLoading({ mode: 'reject' }, e => {
let {retype,item,files,end} = this._getRequest(
e.url
);
let _this = this;
switch (retype) {
case 'updateOption':
this.dom.evalJS(`vm.setData('${JSON.stringify(_this.option)}')`);
break
case 'change':
try {
_this.files = new Map([..._this.files,...JSON.parse(unescape(files))]);
} catch (e) {
return console.error('出错了，请检查代码')
}
_this.onchange(_this.files);
break
case 'progress':
try {
item = JSON.parse(unescape(item));
} catch (e) {
return console.error('出错了，请检查代码')
}
_this._changeFilesItem(item,end);
break
default:
break
}
})
}
_getRequest(url) {
let theRequest = new Object()
let index = url.indexOf('?')
if (index != -1) {
let str = url.substring(index + 1)
let strs = str.split('&')
for (let i = 0; i < strs.length; i++) {
theRequest[strs[i].split('=')[0]] = unescape(strs[i].split('=')[1])
}
}
return theRequest
}
_changeFilesItem(item,end=false) {
this.debug&&console.log('onprogress',JSON.stringify(item));
this.onprogress(item,end);
this.files.set(item.name,item);
}
// 上传接口
_uploadHandle(item) {
item.type = 'loading';
delete item.responseText;
return new Promise((resolve,reject)=>{
this.debug&&console.log('option',JSON.stringify(this.option));
let {url,name,method='POST',header,formData} = this.option;
let form = new FormData();
for (let keys in formData) {
form.append(keys, formData[keys])
}
form.append(name, item.file);
let xmlRequest = new XMLHttpRequest();
xmlRequest.open(method, url, true);
for (let keys in header) {
xmlRequest.setRequestHeader(keys, header[keys])
}
xmlRequest.upload.addEventListener(
'progress',
event => {
if (event.lengthComputable) {
let progress = Math.ceil((event.loaded * 100) / event.total)
if (progress <= 100) {
item.progress = progress;
this._changeFilesItem(item);
}
}
},
false
);
xmlRequest.ontimeout = () => {
console.error('请求超时')
item.type = 'fail';
this._changeFilesItem(item,true);
return resolve(false);
}
xmlRequest.onreadystatechange = ev => {
if (xmlRequest.readyState == 4) {
if (xmlRequest.status == 200) {
this.debug&&console.log('上传完成1：' + xmlRequest.responseText)
item['responseText'] = xmlRequest.responseText;
item.type = 'success';
this._changeFilesItem(item,true);
return resolve(true);
} else if (xmlRequest.status == 0) {
console.error('status = 0 :请检查请求头Content-Type与服务端是否匹配，服务端已正确开启跨域，并且nginx未拦截阻止请求')
}
console.error('--ERROR--：status = ' + xmlRequest.status)
item.type = 'fail';
this._changeFilesItem(item,true);
return resolve(false);
}
}
xmlRequest.send(form)
});
}
_uploadHandleWX(item) {
item.type = 'loading';
delete item.responseText;
return new Promise((resolve,reject)=>{
this.debug&&console.log('option',JSON.stringify(this.option));
let form = {filePath: item.file.path,...this.option };
form['fail'] = ({ errMsg = '' }) => {
console.error('--ERROR--：' + errMsg)
item.type = 'fail';
this._changeFilesItem(item,true);
return resolve(false);
}
form['success'] = res => {
if (res.statusCode == 200) {
this.debug&&console.log('上传完成,微信端返回不一定是字符串，根据接口返回格式判断是否需要JSON.parse：' + res.data)
item['responseText'] = res.data;
item.type = 'success';
this._changeFilesItem(item,true);
return resolve(true);
}
item.type = 'fail';
this._changeFilesItem(item,true);
return resolve(false);
}
let xmlRequest = uni.uploadFile(form);
xmlRequest.onProgressUpdate(({ progress = 0 }) => {
if (progress <= 100) {
item.progress = progress;
this._changeFilesItem(item);
}
})
});
}
}2、使用组件
引入组件后使用
<uploadFile @getUploadSuccess="getUploadSuccess" :uploadUrl="uploadbeforeCreatedUrl" :formData="{}" formatType="png,jpg,jpeg,pdf,docx,doc,xlsx,xls,ppt,pptx">
<image :src="addIcon" mode="scaleToFill" />
</uploadFile>
// uploadUrl为上传的路径
// 文件上传成功回调
getUploadSuccess(fileData){
let resdata = JSON.parse(fileData.responseText);
this.form.activityResource.push(resdata.data);
this.$forceUpdate();
},效果图
