PyCarbon
=========

`Github 链接 <https://github.com/MiliLong/PyCarbon>`_
*********************************************************

源代码
********

    .. code-block:: python

        from selenium import webdriver
        from selenium.webdriver.edge.service import Service
        from selenium.webdriver.common.by import By

        import os
        import time
        import glob
        from urllib import parse

        def get_browser(download_dir):
            download_dir = os.path.abspath(download_dir)
            edge_options = webdriver.EdgeOptions()
            edge_options.add_experimental_option('prefs', {
                "download.default_directory": download_dir, # 设置下载文件的默认目录
                "download.prompt_for_download": False, # 禁用下载提示
                "download.directory_upgrade": True, # 允许下载目录升级，即使指定的下载目录不存在，浏览器也会创建它。
                "safebrowsing.enabled": True # 启用安全浏览功能
            })
            edge_options.add_argument("--log-level=3") # 过滤多余信息   
            driver_path = r'./msedgedriver.exe'
            service = Service(driver_path)
            browser = webdriver.Edge(service=service, options=edge_options)
            browser.minimize_window()
            return browser

        def read_file(file):
            with open(file, 'r') as f:
                text = f.read()
            return text

        def get_files(path):
            files = glob.glob(f'{path}/*')
            for file in files:
                if os.path.isfile:
                    yield file

        def encode_text(file):
            text = read_file(file)
            uri_encoded_text = parse.quote_plus(text)
            return uri_encoded_text

        def main():
            with (get_browser(OUTPUT_DIR))as browser:
                for file in get_files(CODE_DIR):
                    print(f"{'\033[32m'}Processing '{file}'{'\033[0m'}")
                    encoded_text = encode_text(file)
                    url = "https://carbon.now.sh?code=" + encoded_text
                    browser.get(url)

                    time.sleep(2.5)
                    browser.find_element(By.XPATH, "//button[@id='export-menu']").click()
                    browser.find_element(By.XPATH, "//input[@title='filename']").send_keys(file.split('.')[0].split('\\')[-1])
                    browser.find_element(By.XPATH, "//button[contains(text(), '4x')]").click()
                    browser.find_element(By.XPATH, f"//button[@id='export-{OUTPUT_DIR}']").click()
                    time.sleep(2.5)
                
                time.sleep(2.5)
                print(f"{'\033[32m'}Finished.{'\033[0m'}")   

        if __name__ == '__main__':
            CODE_DIR = 'code'
            OUTPUT_DIR = 'svg' # 'png' or 'svg'
            if os.path.isdir(CODE_DIR):
                main()
            else:
                os.mkdir(CODE_DIR)
                msg = f"{'\033[33m'}'{CODE_DIR}' is created please put files in '{os.path.abspath(CODE_DIR)}'{'\033[0m'}"
                print(msg)

评价
*****

    相较于 `requests` 库，`selenium` 库可以动态的爬取网页内容。

    其本质上是模拟人的操作行为。

    在对动态渲染，或者需要模拟人类操作行为的场景下 `selenium` 库非常好用。