DevTools使用Selenium和Python在ws://127.0.0.1:57671/devtools/browser/8a586f7c-5f2c-4d10-8174-7a7bf50e49b5上侦听 [英] DevTools listening on ws://127.0.0.1:57671/devtools/browser/8a586f7c-5f2c-4d10-8174-7a7bf50e49b5 with Selenium and Python

问题描述

我正在使用python +硒来实现Web浏览器自动化，并收到此错误.

I am using python + selenium for web browser automation and getting this error.

DevTools listening on ws://127.0.0.1:57671/devtools/browser/8a586f7c-5f2c-4d10-8174-7a7bf50e49b5
[5096:1196:0909/183254.362:ERROR:mf_helpers.cc(14)] Error in dxva_video_decode_accelerator_win.cc on line 517

当程序到达代码的这一部分时，就会出现问题:-

The problem arises when the program reaches this part of code:-

def send_comments(driver):
    add_comments = driver.find_elements_by_class_name('add') 
    comments = driver.find_elements_by_xpath("//form[@class='addCommentexpand']//textarea[contains(@placeholder,'Add a comment')]") 
    submit_comments = driver.find_elements_by_xpath("//button[text()='Comment']")  
    i = 0
    for add, comment, submit in zip(add_comments, comments, submit_comments):
        print("comment begins")
        add.click()
        print("+add comment clicked")
        comment.click()
        print("comment textbox clicked")
        comment.send_comments("Amazing Art")
        print("text typed")
        submit.click()
        print("comment submited")
        i += 1
        if i > 5:
            driver.close()

send_comments(driver)

它也没有登录控制台.谁能说出问题所在吗?

Its also not logging in console. Can anyone tell whats the problem?

推荐答案

DevTools在ws://127.0.0.1:9222/devtools/browser/

上监听

@AndreaCardaci在文档 在单独的上下文中加载URL 提到在无头模式下使用 Google Chrome

通常的示例代码每次都在单独的上下文中的新的一次性选项卡中运行(认为它是隐身配置文件).

The usual example code is run in a new disposable tab in a separated context (think of it as incognito profiles) each time.

为了从Chrome 62开始获取浏览器版本，浏览器目标URL是在运行时生成的，可以通过 /json/version 端点获取并回退到 /devtools/browser 如果不存在.

As inorder to fetch the browser version since Chrome 62 the browser target URL is generated at runtime and can be obtained via the /json/version endpoint and fallback to /devtools/browser if not present.

以下是相关代码:

const CDP = require('chrome-remote-interface');

async function doInNewContext(action) {
    // fetch the browser version (since Chrome 62 the browser target URL is
    // generated at runtime and can be obtained via the '/json/version'
    // endpoint, fallback to '/devtools/browser' if not present)
    const {webSocketDebuggerUrl} = await CDP.Version();
    // connect to the DevTools special target
    const browser = await CDP({
        target: webSocketDebuggerUrl || 'ws://localhost:9222/devtools/browser'
    });
    // create a new context
    const {Target} = browser;
    const {browserContextId} = await Target.createBrowserContext();
    const {targetId} = await Target.createTarget({
        url: 'about:blank',
        browserContextId
    });
    // connct to the new context
    const client = await CDP({target: targetId});
    // perform user actions on it
    try {
        await action(client);
    } finally {
        // cleanup
        await Target.closeTarget({targetId});
        await browser.close();
    }
}

// this basically is the usual example
async function example(client) {
    // extract domains
    const {Network, Page} = client;
    // setup handlers
    Network.requestWillBeSent((params) => {
        console.log(params.request.url);
    });
    // enable events then start!
    await Promise.all([Network.enable(), Page.enable()]);
    await Page.navigate({url: 'https://github.com'});
    await Page.loadEventFired();
}

doInNewContext(example);

此外，根据获得浏览器目标URL(ws://以编程方式 localhost:9222/devtools/browser/...)，可以在 webSocketDebuggerUrl 字段中的http://127.0.0.1:9222/json/version上使用该端点.因此，或者，如果您使用选项--remote-debugging-port=0启动chrome，则将端口和端点都写入浏览器配置文件文件夹中的 DevToolsAcivePort 文件中

Moreover as per Obtain the browser target URL (ws://localhost:9222/devtools/browser/...) programmatically the endpoint is available over http://127.0.0.1:9222/json/version in a webSocketDebuggerUrl field. So alternatively, if you are starting chrome with the option --remote-debugging-port=0, both port and endpoint are written to the DevToolsAcivePort file in browser profile folder.

此错误不会影响您的@Test，您暂时可以忽略该错误.

This error doesn't impact your @Test and you can ignore the error for the time being.

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