依赖

formidable

代码

前端

<fieldset style="margin: 20px; padding: 20px;"> <legend>单文件，Ajax</legend> <form id="form3"> <div> <input type="text" id="customName" placeholder="自定义文件名" /> </div> <div> <input type="file" class="file" /> </div> <div> <input type="submit" value="上传"> </div> </form></fieldset><fieldset style="margin: 20px; padding: 20px;"> <legend>多文件，Ajax</legend> <form id="form4"> <div> <input type="file" class="file" multiple /> </div> <div> <input type="submit" value="上传" /> </div> </form></fieldset><script> $(function () { const _csrf = "{{ ctx.csrf | safe }}"; $('form').submit(function (e) { e.preventDefault(); const formData = new FormData(); const fileList = $(this).find('.file')[0].files; let index = 0; for (let key of fileList) { formData.append('file' + index, key); index++ } formData.append('isAjax', 'yes'); formData.append('customName', $(this).find('#customName').val() || ''); $.ajax({ url: '/admin/file/upload?_csrf=' + _csrf, data: formData, method: 'POST', contentType: false, processData: false, success: function (result) { }, error: function (responseStr) { alert("error", responseStr); } }); }); });</script>

Node

'use strict';const fs = require('fs');const path = require('path');const awaitWriteStream = require('await-stream-ready').write;const sendToWormhole = require('stream-wormhole');const formidable = require("formidable");const Controller = require('../../core/base_controller');class FileController extends Controller { async parse(req) { const form = new formidable.IncomingForm(); return new Promise((resolve, reject) => { form.parse(req, (err, fields, files) => { resolve({ fields, files }) }) }); } /** * 上传文件，兼容单文件和多文件 * @param customName 单文件自定义文件名 * @param isAjax 上传方式 */ async upload() { const { ctx, logger } = this; const extraParams = await this.parse(ctx.req); let { multipleFile, customName, isAjax } = extraParams && extraParams['fields']; logger.info(multipleFile, customName, isAjax); if (isAjax === 'yes') { const urls = []; for (let key in extraParams.files) { const file = extraParams.files[key]; logger.info('file.name', file.name); logger.info('customName', customName); const stream = fs.createReadStream(file.path); const fileName = customName ? (customName + path.extname(file.name)) : file.name; const target = path.join(this.config.baseDir, 'app/public/upload', fileName); const writeStream = fs.createWriteStream(target); try { await awaitWriteStream(stream.pipe(writeStream)); } catch (err) { await sendToWormhole(stream); throw err; } urls.push(target); } this.success({ urls }) } }}module.exports = FileController;

总结

以上所述是小编给大家介绍的Egg.js 中 AJax 上传文件获取参数，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对网站的支持！