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‎.gitignore‎

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# Created by .ignore support plugin (hsz.mobi)
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### Example user template template
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### Example user template
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# IntelliJ project files
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.idea
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*.iml
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out
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gen

‎web.go‎

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package main
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import (
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"github.com/valyala/fasthttp"
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"log"
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"os"
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"strings"
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"bytes"
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"io/ioutil"
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"strconv"
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"time"
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"fmt"
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)
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func download(url string) bool {
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fileNames := strings.Split(url, "/")
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fileName := fileNames[len(fileNames) - 1]
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if fileName == "" {
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fileName = "noname"
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}
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out, _ := os.Create("./download/" + fileName)
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defer out.Close()
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statusCode, body, err := fasthttp.Get(nil, url)
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if statusCode == 200 && err == nil {
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out.Write(body)
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}
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return true
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}
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func main() {
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m := func(ctx *fasthttp.RequestCtx) {
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switch {
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case string(ctx.Path()) == "/":
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ctx.SetContentType("text/html; charset=utf-8")
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ctx.WriteString(`<!doctype html>
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<html class="no-js">
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<head>
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<meta charset="utf-8">
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<meta http-equiv="X-UA-Compatible" content="IE=edge">
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<meta name="description" content="">
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<meta name="keywords" content="">
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<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
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<title>离线下载</title>
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<meta name="renderer" content="webkit">
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<meta http-equiv="Cache-Control" content="no-siteapp"/>
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<meta name="apple-mobile-web-app-capable" content="yes">
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<meta name="apple-mobile-web-app-status-bar-style" content="black">
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<meta name="apple-mobile-web-app-title" content="Amaze UI"/>
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<meta name="msapplication-TileColor" content="#0e90d2">
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<link rel="stylesheet" href="//cdn.amazeui.org/amazeui/2.4.2/css/amazeui.min.css">
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</head>
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<body>
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<header class="am-topbar am-topbar-inverse">
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<div class="am-container am-cf">
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<div class="am-g">
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<h1 class="am-topbar-brand">
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<a href="#">离线下载</a>
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</h1>
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<!-- topbar-right -->
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<div class="am-topbar-right">
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<button class="am-btn am-btn-primary am-topbar-btn am-btn-sm">基于golang的下载神器</button>
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</div>
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</div>
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</div>
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</header>
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<div class="am-container">
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<div class="am-g">
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<div class="am-u-md-10 am-u-sm-centered">
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<legend>离线下载</legend>
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<div class="am-form-group">
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<p>欢迎使用！采用golang后台下载的方法实现简单的离线下载功能</p>
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<p>文件永久保留，下载空间为512M，若空间不足，请手工删除，且用且珍惜！</p>
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<div class="am-input-group">
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<span class="am-input-group-label">
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<i class="am-icon-cloud-download"></i>
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</span>
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<input type="text" id="download" class="am-form-field" placeholder="请把文件的下载地址粘贴到这里,然后点击Enter即可。" />
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</div>
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</div>
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<button type="submit" class="am-btn am-btn-primary am-btn-block" onclick="download();">Enter</button>
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</div>
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</div>
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<div class="am-g">
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<div class="am-u-md-14 am-u-sm-centered">
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<table class="am-table am-table-hover">
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<thead>
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<tr>
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<th>文件列表</th>
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</tr>
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</thead>
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<tbody id="downlist">
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</tbody>
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</table>
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</div>
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</div>
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<hr>
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<!-- 多说评论框 start -->
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<div class="ds-thread" data-thread-key="c7ef117e8fb5d1de76d99897dbbdad64" data-title="php离线下载" data-url="http://lyxz.gq/"></div>
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<!-- 多说评论框 end -->
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<!-- 多说公共JS代码 start (一个网页只需插入一次) -->
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<script type="text/javascript">
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var duoshuoQuery = {short_name:"lyxzgq"};
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(function() {
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var ds = document.createElement('script');
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ds.type = 'text/javascript';ds.async = true;
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ds.src = (document.location.protocol == 'https:' ? 'https:' : 'http:') + '//static.duoshuo.com/embed.js';
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ds.charset = 'UTF-8';
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(document.getElementsByTagName('head')[0]
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|| document.getElementsByTagName('body')[0]).appendChild(ds);
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})();
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</script>
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<!-- 多说公共JS代码 end -->
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</div>
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<footer ata-am-widget="footer" class="am-footer am-footer-default" style="
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background:#555;
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font-color:#000;
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">
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<style>
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.am-footer-default a{
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color:#999;
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}
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</style>
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<div class="am-footer-miscs">
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<p>友情链接 &nbsp;<a href="http://www.lanyus.com/" rel="friend" target="_blank">无心问世</a></p> &nbsp;
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<p><a href="https://github.com/ilanyu/offline-download" target="_blank">关于</a></p>
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<p class="am-article-meta">
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</p><p><a href="#" target="_blank"><span class="am-icon-qq am-success" target="_blank"></span> 程序开发 无心问世</a></p>
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<br>
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<p>© 2015 无心问世. copyright</p>
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</div>
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</footer>
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<div class="am-modal am-modal-no-btn" tabindex="-1" id="downerror">
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<div class="am-modal-dialog">
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<div class="am-modal-hd">错误
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<a href="javascript: void(0)" class="am-close am-close-spin" data-am-modal-close>&times;</a>
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</div>
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<div class="am-modal-bd">
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下载出现错误，可能是不允许的文件后缀或下载空间已满。
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</div>
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</div>
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</div>
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<!--[if lt IE 9]>
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<script src="//libs.useso.com/js/jquery/1.11.1/jquery.min.js"></script>
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<script src="//cdn.staticfile.org/modernizr/2.8.3/modernizr.js"></script>
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<script src="/js/polyfill/rem.min.js"></script>
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<script src="//libs.useso.com/js/respond.js/1.4.2/respond.min.js"></script>
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<script src="//cdn.amazeui.org/amazeui/2.4.2/js/amazeui.legacy.min.js"></script>
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<![endif]-->
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<!--[if (gte IE 9)|!(IE)]><!-->
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<script src="//libs.useso.com/js/jquery/2.1.1/jquery.min.js"></script>
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<script src="//cdn.amazeui.org/amazeui/2.4.2/js/amazeui.min.js"></script>
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<!--<![endif]-->
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<script>
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function writeDownList() {
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$.getJSON('./downlist',null,function (data) {
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var downlist = document.getElementById('downlist');
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downlist.innerHTML = '<tr><td>#</td><td>名称</td><td>修改时间</td><td>大小</td><td>操作</td></tr>';
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for (var i = 0 ; i < data.length ; i++) {
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downlist.innerHTML = downlist.innerHTML + '<tr><td>' + i + '</td><td><a href="./download/' + data[i]['name'] + '">' + data[i]['name'] + '</a></td><td>' + data[i]['mtime'] + '</td><td>' + data[i]['size'] + '</td><td><button type="button" class="am-btn" onclick="del(\'' + data[i]['name'] + '\');">删除</button></td></tr>';
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}
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});
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}
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function download() {
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var url = document.getElementById("download").value;
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$.get('./down',{'url':url},function (data) {
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if (data == 'success') {
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writeDownList();
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} else {
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$('#downerror').modal();
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}
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});
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}
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function del(file) {
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$.get('./delete',{'file':file},function (data) {
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writeDownList();
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});
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}
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writeDownList();
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</script>
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</body>
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</html>
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`)
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case string(ctx.Path()) == "/down":
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args := ctx.QueryArgs()
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url := string(args.Peek("url"))
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protocol := strings.Split(url, "://")
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if protocol[0] != "http" && protocol[0] != "https" && protocol[0] != "ftp" {
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ctx.WriteString("failed")
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log.Println(protocol)
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return
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}
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go download(url)
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ctx.WriteString("success")
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log.Println("visiter " + ctx.RemoteIP().String() + " use " + string(ctx.UserAgent()) + " downloaded " + url + " in " + time.Now().Format("2006-01-02 15:04:05"))
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case string(ctx.Path()) == "/delete":
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args := ctx.QueryArgs()
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file := string(args.Peek("file"))
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file = strings.Replace(file, "/", "", -1)
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os.Remove("./download/" + file)
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ctx.WriteString("success")
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case bytes.HasPrefix(ctx.Path(), []byte("/download/")):
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fasthttp.FSHandler("./download/", 1)(ctx)
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case string(ctx.Path()) == "/downlist":
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dirList, _ := ioutil.ReadDir("./download/")
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length := len(dirList)
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ctx.WriteString("[")
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for i := 0; i < length; i++ {
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ctx.WriteString(`{"name":"` + dirList[i].Name() + `","mtime":"` + dirList[i].ModTime().Format("2006-01-02 15:04:05") + `","size":"` + strconv.FormatInt(dirList[i].Size(), 10) + ` B"}`)
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if i != length - 1 {
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ctx.WriteString(",")
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}
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}
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ctx.WriteString("]")
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default:
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ctx.Error("not found", fasthttp.StatusNotFound)
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}
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}
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if fileInfo, err := os.Stat("./download"); err != nil || !fileInfo.IsDir() {
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os.Mkdir("./download", 0755)
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log.Println("mkDir ./download")
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}
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bind := fmt.Sprintf("%s:%s", os.Getenv("OPENSHIFT_GO_IP"), os.Getenv("OPENSHIFT_GO_PORT"))
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log.Printf("listening on %s...\n", bind)
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if err := fasthttp.ListenAndServe(bind, m); err != nil {
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log.Fatal(err)
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}
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}

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