request.js
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// zooble@2025-12-14
/**
* 创建一个请求函数，该函数闭包了登录和重试逻辑
* @param {object} baseConfig 基础配置
* @param {string} baseConfig.domain API域名
* @param {string} baseConfig.appid 小程序ID
* @param {string} base.cid 渠道ID
*/
function createRequest(baseConfig) {
let loginPromise = null;
// 登录函数
const login = () => {
if (loginPromise) {
return loginPromise;
}
const ssid = wx.getStorageSync('ssid');
if (ssid) {
return Promise.resolve(ssid);
}
wx.showLoading({ mask: true });
loginPromise = new Promise((resolve, reject) => {
wx.login({
success: res => {
if (!res.code) {
const errorMsg = '登录失败：无法获取code';
wx.showModal({ title: '提示', content: errorMsg, showCancel: false });
return reject(new Error(errorMsg));
}
const { domain, appid } = baseConfig;
wx.request({
url: `${domain}/open-api/mp/login`,
data: { code: res.code, appid },
method: 'POST',
header: { 'content-type': 'application/json' },
dataType: 'json',
success: resp => {
const user = resp.data?.data?.user;
if (user && user.ssid) {
wx.setStorageSync('ssid', user.ssid);
wx.setStorageSync('openid', user.openid);
resolve(user.ssid);
} else {
const errorMsg = resp.data.msg || '登录失败：无效的用户信息';
wx.showModal({ title: '提示', content: errorMsg, showCancel: false });
reject(new Error(errorMsg));
}
},
fail: err => {
wx.showModal({ title: '提示', content: '登录请求失败', showCancel: false });
reject(err);
},
complete: () => {
wx.hideLoading();
loginPromise = null;
}
});
},
fail: err => {
wx.hideLoading();
loginPromise = null;
wx.showModal({ title: '提示', content: '微信登录失败', showCancel: false });
reject(err);
}
});
});
return loginPromise;
};
// 返回的请求函数
const request = async (config) => {
let ssid = wx.getStorageSync('ssid');
if (!ssid) {
try {
ssid = await login();
} catch (e) {
if (config.fail) config.fail(e);
// early return on login failure
return;
}
}
const finalConfig = {
header: { 'content-type': 'application/json' },
dataType: 'json',
method: 'POST',
...config,
data: {
...config.data,
ssid,
cid: baseConfig.cid,
},
success: (resp) => {
// 登录态失效，自动重试
if ([5001000, 5004000].includes(resp.data.code)) {
console.log('ssid expired, retrying request');
wx.setStorageSync('ssid', '');
// 传入原始 config 递归调用，避免 success 被多次包装
request(config);
} else {
if (config.success) {
config.success(resp);
}
}
},
};
return wx.request(finalConfig);
};
return request;
};
module.exports = {
createRequest
};