批量上传文件

上传者: xgskj | 上传时间: 2024-10-11 10:12:47 | 文件大小: 5.68MB | 文件类型: RAR
批量上传文件是网络应用中常见的功能,特别是在大数据时代,用户可能需要一次性上传多个文件,例如图片、文档或视频。在本示例中,我们关注的是一个实现批量上传并带有进度条功能的应用。这个功能通常用于提高用户体验,因为它允许用户监控上传进度,而不仅仅是等待上传完成。 批量上传的核心在于分块上传或多线程上传技术。这种方式将大文件分割成若干小块,然后并发地上传这些小块,最后在服务器端再进行重组。这不仅提高了上传速度,还降低了单个文件上传失败带来的风险,因为即使部分块上传失败,也可以重新上传该部分。 在实现批量上传时,一般会用到前端和后端的技术。前端通常采用JavaScript或其库(如jQuery、React、Vue等)来处理文件选择、分块、进度显示以及与服务器的交互。HTML5引入了File API,使得在浏览器环境中处理文件变得更加容易。文件选择可以通过``元素实现,而File API则提供了读取、切割文件的方法。使用Blob对象可以对文件进行切片,然后通过XMLHttpRequest或fetch API异步上传。 进度条的实现依赖于HTTP请求的Progress Event,它会在数据传输过程中触发,提供已发送和总数据的信息。通过监听这些事件,前端可以实时更新进度条状态。 后端通常使用PHP、Python、Node.js、Java等服务器端语言来接收和重组文件。服务器端需要处理每个上传的文件块,记录其顺序,当所有块都到达时,再按照正确的顺序组合成原始文件。为了确保数据完整性和一致性,可以使用校验和(如MD5或SHA-1)来验证每个上传的块。 在“批量上传3.0”这个例子中,可能包含以下组件: 1. 前端界面:一个用户友好的文件选择器,能够一次选择多个文件,并展示上传进度。 2. 文件分块逻辑:使用JavaScript将大文件拆分为较小的部分,每个部分适合在网络上传输。 3. 进度条显示:实时更新上传进度,为用户提供反馈。 4. 上传接口:前端通过Ajax或fetch调用后端API,逐块上传文件。 5. 后端接收:处理前端发送的每个文件块,存储并跟踪进度。 6. 文件重组:当所有块上传完成后,后端将它们组合成原始文件。 7. 错误处理和重试机制:处理网络中断或部分文件块丢失的情况。 在部署这个应用时,确保服务器配置正确,能处理大量的并发请求,并且有充足的存储空间来暂存上传的文件块。同时,考虑到安全问题,应限制单个文件大小和总的上传大小,以防止恶意用户大量占用服务器资源。此外,为了保护用户隐私,确保对上传文件进行适当的权限控制和加密处理。 批量上传文件并带有进度条的功能涉及到了前端与后端的密切协作,利用了现代Web技术的特性,为用户提供了一种高效、直观的文件上传方式。

文件下载

资源详情

[{"title":"( 693 个子文件 5.68MB ) 批量上传文件","children":[{"title":"main.js.bak <span style='color:#111;'> 781B </span>","children":null,"spread":false},{"title":"FileAction.class <span style='color:#111;'> 3.18KB </span>","children":null,"spread":false},{"title":"MyUtils.class <span style='color:#111;'> 2.21KB </span>","children":null,"spread":false},{"title":"BaseAction.class <span style='color:#111;'> 1.87KB </span>","children":null,"spread":false},{"title":"ext-all.css <span style='color:#111;'> 134.31KB </span>","children":null,"spread":false},{"title":"ext-all-notheme.css <span style='color:#111;'> 96.32KB </span>","children":null,"spread":false},{"title":"xtheme-gray.css <span style='color:#111;'> 38.90KB </span>","children":null,"spread":false},{"title":"xtheme-blue.css <span style='color:#111;'> 38.11KB </span>","children":null,"spread":false},{"title":"UploadPanel.css <span style='color:#111;'> 15.40KB </span>","children":null,"spread":false},{"title":"grid.css <span style='color:#111;'> 10.63KB </span>","children":null,"spread":false},{"title":"form.css <span style='color:#111;'> 9.89KB </span>","children":null,"spread":false},{"title":"button.css <span style='color:#111;'> 8.29KB </span>","children":null,"spread":false},{"title":"panel.css <span style='color:#111;'> 7.24KB </span>","children":null,"spread":false},{"title":"tabs.css <span style='color:#111;'> 6.70KB </span>","children":null,"spread":false},{"title":"grid.css <span style='color:#111;'> 6.35KB </span>","children":null,"spread":false},{"title":"panel-reset.css <span style='color:#111;'> 6.13KB </span>","children":null,"spread":false},{"title":"core.css <span style='color:#111;'> 5.30KB </span>","children":null,"spread":false},{"title":"toolbar.css <span style='color:#111;'> 5.29KB </span>","children":null,"spread":false},{"title":"layout.css <span style='color:#111;'> 4.69KB </span>","children":null,"spread":false},{"title":"date-picker.css <span style='color:#111;'> 4.55KB </span>","children":null,"spread":false},{"title":"tree.css <span style='color:#111;'> 4.36KB </span>","children":null,"spread":false},{"title":"tree.css <span style='color:#111;'> 3.54KB </span>","children":null,"spread":false},{"title":"window.css <span style='color:#111;'> 3.49KB </span>","children":null,"spread":false},{"title":"menu.css <span style='color:#111;'> 3.43KB </span>","children":null,"spread":false},{"title":"resizable.css <span style='color:#111;'> 2.95KB </span>","children":null,"spread":false},{"title":"editor.css <span style='color:#111;'> 2.94KB </span>","children":null,"spread":false},{"title":"date-picker.css <span style='color:#111;'> 2.76KB </span>","children":null,"spread":false},{"title":"tabs.css <span style='color:#111;'> 2.65KB </span>","children":null,"spread":false},{"title":"qtips.css <span style='color:#111;'> 2.64KB </span>","children":null,"spread":false},{"title":"toolbar.css <span style='color:#111;'> 2.64KB </span>","children":null,"spread":false},{"title":"form.css <span style='color:#111;'> 2.47KB </span>","children":null,"spread":false},{"title":"button.css <span style='color:#111;'> 2.38KB </span>","children":null,"spread":false},{"title":"slider.css <span style='color:#111;'> 1.90KB </span>","children":null,"spread":false},{"title":"panel.css <span style='color:#111;'> 1.82KB </span>","children":null,"spread":false},{"title":"menu.css <span style='color:#111;'> 1.72KB </span>","children":null,"spread":false},{"title":"window.css <span style='color:#111;'> 1.66KB </span>","children":null,"spread":false},{"title":"core.css <span style='color:#111;'> 1.62KB </span>","children":null,"spread":false},{"title":"list-view.css <span style='color:#111;'> 1.62KB </span>","children":null,"spread":false},{"title":"resizable.css <span style='color:#111;'> 1.60KB </span>","children":null,"spread":false},{"title":"box.css <span style='color:#111;'> 1.49KB </span>","children":null,"spread":false},{"title":"box.css <span style='color:#111;'> 1.48KB </span>","children":null,"spread":false},{"title":"layout.css <span style='color:#111;'> 1.27KB </span>","children":null,"spread":false},{"title":"qtips.css <span style='color:#111;'> 1.26KB </span>","children":null,"spread":false},{"title":"dialog.css <span style='color:#111;'> 1.20KB </span>","children":null,"spread":false},{"title":"borders.css <span style='color:#111;'> 1.08KB </span>","children":null,"spread":false},{"title":"dd.css <span style='color:#111;'> 1.03KB </span>","children":null,"spread":false},{"title":"combo.css <span style='color:#111;'> 887B </span>","children":null,"spread":false},{"title":"dialog.css <span style='color:#111;'> 836B </span>","children":null,"spread":false},{"title":"list-view.css <span style='color:#111;'> 804B </span>","children":null,"spread":false},{"title":"progress.css <span style='color:#111;'> 795B </span>","children":null,"spread":false},{"title":"combo.css <span style='color:#111;'> 785B </span>","children":null,"spread":false},{"title":"dd.css <span style='color:#111;'> 658B </span>","children":null,"spread":false},{"title":"progress.css <span style='color:#111;'> 648B </span>","children":null,"spread":false},{"title":"slider.css <span style='color:#111;'> 647B </span>","children":null,"spread":false},{"title":"debug.css <span style='color:#111;'> 552B </span>","children":null,"spread":false},{"title":"borders.css <span style='color:#111;'> 548B </span>","children":null,"spread":false},{"title":"debug.css <span style='color:#111;'> 488B </span>","children":null,"spread":false},{"title":"reset-min.css <span style='color:#111;'> 463B </span>","children":null,"spread":false},{"title":"reset.css <span style='color:#111;'> 463B </span>","children":null,"spread":false},{"title":"editor.css <span style='color:#111;'> 307B </span>","children":null,"spread":false},{"title":"Thumbs.db <span style='color:#111;'> 5.00KB </span>","children":null,"spread":false},{"title":"dlg-bg.gif <span style='color:#111;'> 27.20KB </span>","children":null,"spread":false},{"title":"tool-sprites.gif <span style='color:#111;'> 4.36KB </span>","children":null,"spread":false},{"title":"tool-sprites.gif <span style='color:#111;'> 4.29KB </span>","children":null,"spread":false},{"title":"btn.gif <span style='color:#111;'> 4.20KB </span>","children":null,"spread":false},{"title":"tip-sprite.gif <span style='color:#111;'> 4.17KB </span>","children":null,"spread":false},{"title":"error-tip-corners.gif <span style='color:#111;'> 4.08KB </span>","children":null,"spread":false},{"title":"tip-sprite.gif <span style='color:#111;'> 4.08KB </span>","children":null,"spread":false},{"title":"tip-sprite.gif <span style='color:#111;'> 3.94KB </span>","children":null,"spread":false},{"title":"btn.gif <span style='color:#111;'> 3.24KB </span>","children":null,"spread":false},{"title":"large-loading.gif <span style='color:#111;'> 3.16KB </span>","children":null,"spread":false},{"title":"blue-loading.gif <span style='color:#111;'> 3.16KB </span>","children":null,"spread":false},{"title":"tab-sprite.gif <span style='color:#111;'> 3.08KB </span>","children":null,"spread":false},{"title":"tools-sprites-trans.gif <span style='color:#111;'> 2.78KB </span>","children":null,"spread":false},{"title":"tools-sprites-trans.gif <span style='color:#111;'> 2.58KB </span>","children":null,"spread":false},{"title":"album_shared.gif <span style='color:#111;'> 2.50KB </span>","children":null,"spread":false},{"title":"group-cs.gif <span style='color:#111;'> 2.40KB </span>","children":null,"spread":false},{"title":"group-cs.gif <span style='color:#111;'> 2.40KB </span>","children":null,"spread":false},{"title":"dwf.gif <span style='color:#111;'> 2.34KB </span>","children":null,"spread":false},{"title":"published.gif <span style='color:#111;'> 2.32KB </span>","children":null,"spread":false},{"title":"album.gif <span style='color:#111;'> 2.31KB </span>","children":null,"spread":false},{"title":"recycle.gif <span style='color:#111;'> 2.23KB </span>","children":null,"spread":false},{"title":"subs.gif <span style='color:#111;'> 2.22KB </span>","children":null,"spread":false},{"title":"htm.gif <span style='color:#111;'> 2.13KB </span>","children":null,"spread":false},{"title":"search-trigger.gif <span style='color:#111;'> 2.13KB </span>","children":null,"spread":false},{"title":"exe.gif <span style='color:#111;'> 2.12KB </span>","children":null,"spread":false},{"title":"jpg.gif <span style='color:#111;'> 2.10KB </span>","children":null,"spread":false},{"title":"tabs-sprite.gif <span style='color:#111;'> 2.07KB </span>","children":null,"spread":false},{"title":"loading-balls.gif <span style='color:#111;'> 2.07KB </span>","children":null,"spread":false},{"title":"xls.gif <span style='color:#111;'> 2.06KB </span>","children":null,"spread":false},{"title":"bmp.gif <span style='color:#111;'> 2.06KB </span>","children":null,"spread":false},{"title":"tabs-sprite.gif <span style='color:#111;'> 2.06KB </span>","children":null,"spread":false},{"title":"root.gif <span style='color:#111;'> 2.06KB </span>","children":null,"spread":false},{"title":"network_user.gif <span style='color:#111;'> 2.04KB </span>","children":null,"spread":false},{"title":"tb-sprite.gif <span style='color:#111;'> 2.02KB </span>","children":null,"spread":false},{"title":"published_folders.gif <span style='color:#111;'> 2.02KB </span>","children":null,"spread":false},{"title":"dll.gif <span style='color:#111;'> 2.02KB </span>","children":null,"spread":false},{"title":"checkbox.gif <span style='color:#111;'> 2.01KB </span>","children":null,"spread":false},{"title":"mdb.gif <span style='color:#111;'> 2.01KB </span>","children":null,"spread":false},{"title":"xlsx.gif <span style='color:#111;'> 2.00KB </span>","children":null,"spread":false},{"title":"......","children":null,"spread":false},{"title":"<span style='color:steelblue;'>文件过多,未全部展示</span>","children":null,"spread":false}],"spread":true}]

评论信息

免责申明

【只为小站】的资源来自网友分享,仅供学习研究,请务必在下载后24小时内给予删除,不得用于其他任何用途,否则后果自负。基于互联网的特殊性,【只为小站】 无法对用户传输的作品、信息、内容的权属或合法性、合规性、真实性、科学性、完整权、有效性等进行实质审查;无论 【只为小站】 经营者是否已进行审查,用户均应自行承担因其传输的作品、信息、内容而可能或已经产生的侵权或权属纠纷等法律责任。
本站所有资源不代表本站的观点或立场,基于网友分享,根据中国法律《信息网络传播权保护条例》第二十二条之规定,若资源存在侵权或相关问题请联系本站客服人员,zhiweidada#qq.com,请把#换成@,本站将给予最大的支持与配合,做到及时反馈和处理。关于更多版权及免责申明参见 版权及免责申明