第一次提交

uni_modules/uni-pay/uniCloud/cloudfunctions/uni-pay-co/libs/alipay.js

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+/**
+ * 支付宝相关函数
+ */
+const common = require('./common');
+const crypto = require('crypto');
+
+const ALIPAY_ALGORITHM_MAPPING = {
+	RSA: 'RSA-SHA1',
+	RSA2: 'RSA-SHA256'
+}
+
+var alipay = {
+	/**
+	 * 获取openid
+	 */
+	async getOpenid(data) {
+		let {
+			config={},
+			code,
+		} = data;
+		if (!config.appId) throw new Error("uni-pay配置alipay.mp节点下的appId不能为空");
+		if (!config.privateKey) throw new Error("uni-pay配置alipay.mp节点下的privateKey不能为空");
+		let timestamp = common.timeFormat(new Date(), "yyyy-MM-dd hh:mm:ss");
+		let method = "alipay.system.oauth.token";
+		let params = {
+			timestamp,
+			code,
+			grant_type: "authorization_code"
+		};
+		let signData = this._getSign(method, params, config);
+		// 格式化url和请求参数
+		const { url, execParams } = this._formatUrl(signData);
+		let res = await uniCloud.httpclient.request(url, {
+			method: 'POST',
+			data: execParams,
+			dataType: 'text',
+		});
+		const result = JSON.parse(res.data)
+		let response = result.alipay_system_oauth_token_response;
+		if (res.status === 200 && response.user_id) {
+			return {
+				errCode: 0,
+				errMsg: 'ok',
+				openid: response.user_id,
+				user_id: response.user_id,
+			}
+		} else {
+			return {
+				errCode: -1,
+				errMsg: result.error_response.sub_msg
+			}
+		}
+	},
+
+	/**
+	 * 签名
+	 * @param {String} method 方法名
+	 * @param {Object} params 参数
+	 * @param {Object} config 配置
+	 */
+	_getSign(method, params, config) {
+		let signParams = Object.assign({
+			method,
+			app_id: config.appId,
+			charset: config.charset || "utf-8",
+			version: config.version || "1.0",
+			sign_type: config.signType || "RSA2",
+		}, params);
+		if (config.appCertSn && config.alipayRootCertSn) {
+			signParams = Object.assign({
+				app_cert_sn: config.appCertSn,
+				alipay_root_cert_sn: config.alipayRootCertSn,
+			}, signParams);
+		}
+		const bizContent = params.biz_content;
+		if (bizContent) {
+			signParams.biz_content = JSON.stringify(bizContent);
+		}
+		// 排序
+		const decamelizeParams = this._sortObj(signParams);
+		// 拼接url参数
+		let signStr = this._objectToUrl(decamelizeParams);
+
+		let keyType = config.keyType || 'PKCS8';
+		const privateKeyType = keyType === 'PKCS8' ? 'PRIVATE KEY' : 'RSA PRIVATE KEY'
+		let privateKey = this._formatKey(config.privateKey, privateKeyType);
+		// 计算签名
+		const sign = crypto.createSign(ALIPAY_ALGORITHM_MAPPING[signParams.sign_type])
+			.update(signStr, 'utf8').sign(privateKey, 'base64');
+		return Object.assign(decamelizeParams, { sign });
+	},
+
+	_formatKey(key, type) {
+		return `-----BEGIN ${type}-----\n${key}\n-----END ${type}-----`
+	},
+	_sortObj(params) {
+		let keysArr = Object.keys(params).sort();
+		let sortObj = {};
+		for (let i in keysArr) {
+			sortObj[keysArr[i]] = (params[keysArr[i]]);
+		}
+		return sortObj;
+	},
+	_objectToUrl(obj) {
+		let str = "";
+		for (let key in obj) {
+			if (obj[key]) {
+				str += `&${key}=${obj[key]}`;
+			}
+		}
+		if (str) str = str.substring(1);
+		return str;
+	},
+	_formatUrl(params, url = "https://openapi.alipay.com/gateway.do") {
+		let requestUrl = url;
+		// 需要放在 url 中的参数列表
+		const urlArgs = [
+			'app_id',
+			'method',
+			'format',
+			'charset',
+			'sign_type',
+			'sign',
+			'timestamp',
+			'version',
+			'notify_url',
+			'return_url',
+			'auth_token',
+			'app_auth_token'
+		]
+
+		for (const key in params) {
+			if (urlArgs.indexOf(key) > -1) {
+				const val = encodeURIComponent(params[key])
+				requestUrl = `${requestUrl}${requestUrl.includes('?') ? '&' : '?'
+		      }${key}=${val}`
+				// 删除 postData 中对应的数据
+				delete params[key]
+			}
+		}
+
+		return { execParams: params, url: requestUrl }
+	}
+};
+module.exports = alipay;