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class NetworkOptimizer {
constructor() {
this.requestCache = new Map();
this.requestQueue = [];
this.maxConcurrent = 3;
this.currentConcurrent = 0;
}
async smartRequest(options) {
const {
url,
method = 'GET',
data = {},
cache = true,
timeout = 10000,
retry = 3
} = options;
if (cache && method === 'GET') {
const cached = this.getCachedRequest(url, data);
if (cached) {
return cached;
}
}
return new Promise((resolve, reject) => {
this.requestQueue.push({
options: { url, method, data, timeout, retry },
resolve,
reject
});
this.processQueue();
});
}
async processQueue() {
if (this.currentConcurrent >= this.maxConcurrent || this.requestQueue.length === 0) {
return;
}
this.currentConcurrent++;
const request = this.requestQueue.shift();
try {
const result = await this.executeRequest(request.options);
if (request.options.method === 'GET') {
this.setCachedRequest(request.options.url, request.options.data, result);
}
request.resolve(result);
} catch (error) {
request.reject(error);
} finally {
this.currentConcurrent--;
this.processQueue();
}
}
async executeRequest(options) {
const { url, method, data, timeout, retry } = options;
let lastError;
for (let i = 0; i < retry; i++) {
try {
const result = await this.makeRequest(url, method, data, timeout);
return result;
} catch (error) {
lastError = error;
if (i < retry - 1) {
await this.delay(Math.pow(2, i) * 1000);
}
}
}
throw lastError;
}
makeRequest(url, method, data, timeout) {
return new Promise((resolve, reject) => {
const requestOptions = {
url,
method,
data,
timeout,
success: resolve,
fail: reject
};
wx.request(requestOptions);
});
}
getCachedRequest(url, data) {
const key = this.generateCacheKey(url, data);
const cached = this.requestCache.get(key);
if (cached && Date.now() - cached.timestamp < 300000) {
return cached.data;
}
return null;
}
setCachedRequest(url, data, result) {
const key = this.generateCacheKey(url, data);
this.requestCache.set(key, {
data: result,
timestamp: Date.now()
});
}
generateCacheKey(url, data) {
return `${url}_${JSON.stringify(data)}`;
}
delay(ms) {
return new Promise(resolve => setTimeout(resolve, ms));
}
async batchRequest(requests) {
const promises = requests.map(request =>
this.smartRequest(request)
);
return Promise.allSettled(promises);
}
}
const networkOptimizer = new NetworkOptimizer();
Page({
async loadData() {
try {
const [userInfo, productList, config] = await Promise.all([
networkOptimizer.smartRequest({
url: '/api/user/info',
cache: true
}),
networkOptimizer.smartRequest({
url: '/api/products',
cache: true
}),
networkOptimizer.smartRequest({
url: '/api/config',
cache: true
})
]);
this.setData({
userInfo,
productList,
config
});
} catch (error) {
console.error('数据加载失败:', error);
}
}
});
|
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