上传了一些文件

api/index.php

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+<?php exit; ?>

api/set.php

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+<?php
+    // 引入类
+    require_once('../inc/require.php');
+    global $config;
+    $url_c = new url();
+
+    $opt = [];
+    $opt['success'] = 'false';
+
+    $request_arr = json_decode(file_get_contents('php://input'), true);
+    if(isset($request_arr['url'])) {
+        // 添加 HTTP 协议前缀
+        if(!strstr($request_arr['url'], 'http://') && !strstr($request_arr['url'], 'https:')) $request_arr['url'] = 'http://' . $request_arr['url'];
+        // 检测网址格式是否正确
+        $is_link = preg_match('(http(|s)://([\w-]+\.)+[\w-]+(/)?)', $request_arr['url']);
+        // 判断条件
+        if($request_arr['url'] != '' && !strstr($request_arr['url'], $_SERVER['HTTP_HOST']) && $is_link) {
+            $opt['success'] = 'true';
+            $opt['content']['url'] = $url_c->set_url($request_arr['url'], $config['length']);
+        } else if(strstr($request_arr['url'], $_SERVER['HTTP_HOST'])) {
+            $opt['content'] = '链接已经是短地址了。';
+        } else if(!$is_link) {
+            $opt['content'] = '请输入正确格式的网址。';
+        }
+    } else {
+        $opt['content'] = '调用参数不能为空。';
+    }
+    // 输出
+    echo json_encode($opt);
+?>

asset/css/main.css

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+/* Reset */
+* {
+    margin: 0;
+    padding: 0;
+}
+html, body, input, text, textarea {
+    outline: none;
+    font-family: 'Arial', 'Microsoft YaHei', '黑体', '宋体', sans-serif;
+    font-size: 12px;
+}
+html, body {
+    background: #fff;
+}
+a {
+    text-decoration: none;
+}
+a:hover {
+    text-decoration: underline;
+}
+
+/* Main */
+.wrap {
+    text-align: center;
+    overflow: hidden;
+}
+.wrap .meta {
+    margin: 160px 0 0 0;
+    opacity: 0;
+    transform: translateY(-150px);
+    transition: .5s all ease;
+}
+.on .wrap .meta {
+    opacity: 1;
+    transform: translateY(0);
+}
+.wrap .meta .title {
+    line-height: 1em;
+    color: #ff4665;
+    font-size: 42px;
+    text-transform: uppercase;
+}
+.wrap .meta .description {
+    margin: 10px 0 0 0;
+    line-height: 1em;
+    color: #7e7e7e;
+    font-size: 16px;
+    font-weight: normal;
+}
+.wrap .link-area {
+    margin: 50px 0 0 0;
+    opacity: 0;
+    transition: .5s opacity ease;
+}
+.on .wrap .link-area {
+    opacity: 1;
+}
+.wrap .link-area input {
+    display: inline-block;
+    vertical-align: middle;
+}
+.wrap .link-area #url,
+.wrap .link-area #shorturl {
+    width: 320px;
+    height: 32px;
+    line-height: 32px;
+    padding: 0 10px;
+    border: 3px solid #bdc3c7;
+    border-radius: 5px;
+    color: #333;
+}
+.wrap .link-area #url.focus,
+.wrap .link-area #url:focus {
+    border-color: #ff4665;
+    transition: .2s border ease;
+}
+.wrap .link-area #shorturlcopy,
+.wrap .link-area #submit {
+    width: 90px;
+    height: 38px;
+    margin: 0 0 0 5px;
+    background: #ff4665;
+    border-radius: 5px;
+    color: #fff;
+    border: none;
+    cursor: pointer;
+    transition: .2s opacity ease;
+}
+.wrap .link-area #submit:hover {
+    opacity: .75;
+}
+.wrap .link-area #submit:active {
+    opacity: .9;
+}
+.wrap .footer {
+    width: 100%;
+    bottom: 80px;
+    left: 0;
+    position: absolute;
+    color: #7e7e7e;
+}
+.wrap .footer a {
+    color:#ff4665;
+}

asset/js/app.js

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+	
+function copyText() {
+        var input = document.getElementById("shorturl");
+        input.select(); // 选中文本
+        document.execCommand("copy"); // 执行浏览器复制命令
+}
+
+
+var APP = (function(){
+
+    var fn = {
+        
+        // 生成短地址
+        setUrl: function(self) {
+            var urlEl = document.getElementById('url'),
+                tips = 'https://',
+                request = {"url": urlEl.value};
+            fn.getJson('api/set.php', true, JSON.stringify(request), function(res) {
+                if(res.success == 'true') {
+                    //urlEl.className = 'focus';
+                    //urlEl.value = res.content.url;
+                    $res = document.getElementById('shorturl')
+                    $res.className = 'focus';
+                    $res.value = res.content.url;
+                } else {
+                    urlEl.className = '';
+                    urlEl.value = '';
+                    urlEl.setAttribute('placeholder', res.content);
+                    setTimeout(function() {
+                        urlEl.setAttribute('placeholder', tips);
+                    }, 2000);
+                }
+            });
+        },
+        // 获取 JSON 数据
+        getJson: function(url, post, data, callback) {
+            var xhr = new XMLHttpRequest(),
+                type = (post) ? 'POST' : 'GET';
+            xhr.onreadystatechange = function() {
+                if(xhr.readyState == 4 && xhr.status == 200) {
+                    var json = JSON.parse(xhr.responseText);
+                    callback(json);
+                } else if(xhr.readyState == 4) {
+                    callback(false);
+                }
+            }
+            xhr.open(type, url, true);
+            xhr.send(data);
+        } 
+    },
+    init = function() {
+        setTimeout(function() {
+            var el = document.getElementsByTagName('html')[0];
+            el.className = 'on';
+        }, 10);
+    };
+    return {fn: fn, init: init}
+})();
+
+document.addEventListener('DOMContentLoaded', function() {APP.init();})

inc/class/db.class.php

@@ -0,0 +1,32 @@
+<?php
+    class db  {
+        function __construct() {
+            $this->db = new PDO('sqlite:' . dirname(__FILE__) . '/database.db');
+            $this->init_tab();
+        }
+        // 初始化数据库结构
+        function init_tab() {
+            // 网址表
+            $this->db->exec("CREATE TABLE urls(id char(8) PRIMARY KEY, url longtext, ip varchar(16), ua varchar(255))");
+        }
+        // 查询表内容
+        function query($name, $rule = '') {
+            $query = $this->db->prepare("SELECT * FROM $name $rule");
+            $query->execute();
+            $result = $query->fetchAll();
+            return $result;
+        }
+        // 插入表内容
+        function insert($tab, $key, $val) {
+            $exec = $this->db->exec("INSERT INTO $tab ($key) VALUES($val)");
+            if(!$exec) return false;
+            $this->db->beginTransaction();
+        }
+        // 删除表内容
+        function delete($tab, $rule = '') {
+            $exec = $this->db->exec("DELETE FROM $tab $rule");
+            if(!$exec) return false;
+            $this->db->beginTransaction();
+        }
+    }
+?>

inc/class/url.class.php

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+<?php
+    class url {
+        function __construct() {
+            global $db_c;
+            $this->db = $db_c;
+        }
+        // 生成短地址
+        public function set_url($url, $size = 4) {
+            $id = $this->get_id($url);
+            if(!$id) {
+                $id = $this->create_id($url, $size);
+                $ip = get_ip();
+                $ua = get_ua();
+                $this->db->insert('urls', 'id, url, ip, ua', "'$id', '$url', '$ip', '$ua'");
+            }
+            $s_url = get_uri() . $id;
+            return $s_url;
+        }
+        // 生成地址 ID
+        public function create_id($url, $size = 4) {
+            $md5 = md5($url);
+            // 随机抽取 MD5 中的字符作为 ID
+            $id = '';
+            for($i = 0; $i < $size; $i++) {
+              $rand_id = rand(0, strlen($md5) - 1);
+              $id .= $md5[$rand_id];
+            }
+            // ID 检测
+            if($this->has_id($id)) {
+              return $this->create_id($url, $size);
+            } else {
+              return $id;
+            }
+        }
+        // 查询 ID 号
+        public function get_id($url) {
+            $result = $this->db->query('urls', "WHERE url = '$url'");
+            (count($result) > 0) ? $opt = $result[0]['id'] : $opt = false;
+            return $opt;
+        }
+        // 查询目标地址
+        public function get_url($id) {
+            $result = $this->db->query('urls', "WHERE id = '$id'");
+            (count($result) > 0) ? $opt = $result[0]['url'] : $opt = false;
+            return $opt;
+        }
+        // 检测 ID 是否已经存在
+        public function has_id($id) {
+            $result = $this->db->query('urls', "WHERE id = '$id'");
+            (count($result) > 0) ? $opt = true : $opt = false;
+            return $opt;
+        }
+        // 清空短地址
+        public function clean_urls() {
+            $del = $this->db->delete('urls');
+            if($del) return true;
+            return false;
+        }
+    }
+?>