制作page.click事件后如何收集多个Json响应? [英] How to collect several Json responses after I made page.click event?

问题描述

我有两页.在第一页我点击 '#btnSearch' 并且第二页加载几个 JSON 文件作为响应.我需要将这些 JSON 文件的数据收集到数组 results 中.我的问题是 results 是 empty.

I have two pages. On First page I make the click '#btnSearch'and the Second pages loads several JSON files as response. I need to collect the data of those JSON files into array results. My problem is that results are empty.

            await page.goto(url, { waitUntil: 'load');
            await page.click('#btnSearch');

            const results = [];

            await page.on('response', async (response) => {
                if (response.url() && response.status() == 200) {
                    console.log('XHR response received');
                    results.push(await response.json());
                }
            });
            //await page.goto(url, {waitUntil : 'networkidle0'});
            await page.waitForSelector('#statusInfo');

            console.log(results);

推荐答案

page.on 事件侦听器应该在您需要捕获的网络请求发出之前声明.

page.on event listener should be declared before the network requests that you need to catch are made.

我不确定您的目标网站是如何工作的，所以我可能会做出错误的猜测，但是如果我们尝试以这种方式更改代码会怎样:

I'm not sure how your target site works so I may make a wrong guess, but what if we try to change code in this way:

const results = [];

// Open the first page
await page.goto(url, { waitUntil: 'load');

// Register an event listener
await page.on('response', async (response) => {
    if (response.url() && response.status() == 200) {
        console.log('XHR response received');
        results.push(await response.json());
    }
});

// Trigger navigation to the second page
await page.click('#btnSearch');

// wait until the navigation is finished
await page.waitForNavigation(); // <-- remove the line if script errors with timeout

await page.waitForSelector('#statusInfo');

console.log(results);

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