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项目合集/校园失物招领/min-backend/utils/.pydio

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+690abbe8-c996-435b-aa38-7642e18ab4e8

项目合集/校园失物招领/min-backend/utils/aliOss/.pydio

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+174c0f33-e8e4-47e7-9485-4f3252f4ea74

项目合集/校园失物招领/min-backend/utils/aliOss/uploadOssHelper.js

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+const crypto = require("crypto-js");
+
+class uploadOssHelper {
+  constructor(options) {
+    this.accessKeyId = options.accessKeyId;
+    this.accessKeySecret = options.accessKeySecret;
+    // 限制参数的生效时间，单位为小时，默认值为1。
+    this.timeout = options.timeout || 1; 
+    // 限制上传文件的大小，单位为MB，默认值为10。
+    this.maxSize = options.maxSize || 10;
+  }
+
+  createUploadParams() {
+    const policy = this.getPolicyBase64();
+    const signature = this.signature(policy);
+    return {
+      OSSAccessKeyId: this.accessKeyId,
+      policy: policy,
+      signature: signature,
+    };
+  }
+
+  getPolicyBase64() {
+    let date = new Date();
+    // 设置policy过期时间。
+    date.setHours(date.getHours() + this.timeout);
+    let srcT = date.toISOString();
+    const policyText = {
+      expiration: srcT,
+      conditions: [
+        // 限制上传文件大小。
+        ["content-length-range", 0, this.maxSize * 1024 * 1024],
+      ],
+    };
+    const buffer = new Buffer(JSON.stringify(policyText));
+    return buffer.toString("base64");
+  }
+
+  signature(policy) {
+    return crypto.enc.Base64.stringify(
+      crypto.HmacSHA1(policy, this.accessKeySecret)
+    );
+  }
+}
+
+module.exports = uploadOssHelper;

项目合集/校园失物招领/min-backend/utils/index.js

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+var md5 = require("md5");
+class Utils {
+
+    Md5Password(str) {
+        return md5(str);
+    }
+
+    uuid(prefix = "", randomLength = 6) {
+        // 兼容更低版本的默认值写法
+        prefix === undefined ? prefix = "" : prefix;
+        randomLength === undefined ? randomLength = 8 : randomLength;
+
+        // 设置随机用户名
+        // 用户名随机词典数组
+        let nameArr = [
+            [1, 2, 3, 4, 5, 6, 7, 8, 9, 0],
+            ["a", "b", "c", "d", "e", "f", "g", "h", "i", "g", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"]
+        ]
+
+        // 随机名字字符串
+        let name = prefix;
+        // 循环遍历从用户词典中随机抽出一个
+        for (var i = 0; i < randomLength; i++) {
+            // 随机生成index
+            let index = Math.floor(Math.random() * 2);
+            let zm = nameArr[index][Math.floor(Math.random() * nameArr[index].length)];
+            // 如果随机出的是英文字母
+            if (index === 1) {
+                // 则百分之50的概率变为大写
+                if (Math.floor(Math.random() * 2) === 1) {
+                    zm = zm.toUpperCase();
+                }
+            }
+            // 拼接进名字变量中
+            name += zm;
+        }
+        // 将随机生成的名字返回
+        return name;
+    }
+
+    getTime() {
+        var year = new Date().getFullYear();
+        var month = new Date().getMonth() + 1;
+        var day = new Date().getDate();
+        var hour = new Date().getHours();
+        var minute = new Date().getMinutes();
+        return `${year}年${month}月${day}日 ${hour}:${minute}`
+    }
+}
+
+module.exports = new Utils()