{"id":250,"date":"2024-04-12T21:22:27","date_gmt":"2024-04-12T13:22:27","guid":{"rendered":"http:\/\/www.sangco.cn\/?p=250"},"modified":"2024-04-12T21:23:31","modified_gmt":"2024-04-12T13:23:31","slug":"%e4%b8%8b%e8%bd%bd%e6%97%a0src%e5%9b%be%e7%89%87%e7%9a%84%e6%96%b9%e6%b3%95%ef%bc%88canvas%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.sangco.cn\/?p=250","title":{"rendered":"\u4e0b\u8f7d\u65e0src\u56fe\u7247\u7684\u65b9\u6cd5\uff08canvas\uff09"},"content":{"rendered":"<pre class=\"brush:other\">from selenium import webdriver\r\nfrom selenium.webdriver.common.by import By\r\nimport base64\r\nimport io\r\nfrom PIL import Image\r\nimport os\r\nimport time\r\n \r\n# \u521d\u59cb\u5316WebDriver\r\ndriver = webdriver.Edge()  # \u6216\u8005\u4f7f\u7528\u5176\u4ed6\u6d4f\u89c8\u5668\uff0c\u5982Firefox\r\n \r\n# \u8bbe\u7f6e\u4e0b\u8f7d\u56fe\u7247\u7684\u8def\u5f84\r\ndownload_path = 'd:\/a'\r\nif not os.path.exists(download_path):\r\n    os.makedirs(download_path)\r\n \r\n# \u6253\u5f00\u7f51\u9875\r\nurl = 'https:\/\/www.docin.com\/p-xxxxxxxxx.html'  # \u66ff\u6362\u4e3a\u5305\u542bCanvas\u5143\u7d20\u7684\u7f51\u9875URL\r\ndriver.get(url)\r\n \r\n# \u7b49\u5f85\u9875\u9762\u52a0\u8f7d\u5b8c\u6210\uff08\u53ef\u9009\uff0c\u6839\u636e\u9875\u9762\u52a0\u8f7d\u60c5\u51b5\u8c03\u6574\uff09\r\na = input('\u7b49\u5f85\u52a0\u8f7d\u5b8c\u6210\uff1a')  # \u6216\u8005\u4f7f\u7528WebDriverWait\u548cexpected_conditions\u6765\u7b49\u5f85\u7279\u5b9a\u6761\u4ef6\r\n \r\n# \u83b7\u53d6\u9875\u9762\u4e2d\u6240\u6709\u7684Canvas\u5143\u7d20\r\ncanvases = driver.find_elements(By.TAG_NAME, 'canvas')\r\n \r\n# \u904d\u5386\u6bcf\u4e2aCanvas\u5143\u7d20\u5e76\u4e0b\u8f7d\u56fe\u7247\r\nfor index, canvas in enumerate(canvases):\r\n    # \u6267\u884cJavaScript\u811a\u672c\u83b7\u53d6Canvas\u56fe\u7247\u6570\u636e\r\n    canvas_data = driver.execute_script(\"\"\"  \r\n        return arguments[0].toDataURL('image\/png').replace('image\/png', 'image\/octet-stream');  \r\n    \"\"\", canvas)\r\n \r\n    # \u5c06Base64\u7f16\u7801\u7684\u56fe\u7247\u6570\u636e\u8f6c\u6362\u4e3a\u4e8c\u8fdb\u5236\u6570\u636e\r\n    image_data = base64.b64decode(canvas_data.split(',')[1])\r\n \r\n    # \u5c06\u4e8c\u8fdb\u5236\u6570\u636e\u8f6c\u6362\u4e3a\u56fe\u7247\u6587\u4ef6\u5e76\u4fdd\u5b58\u5230\u672c\u5730\r\n    image_name = f'canvas_image_{str(index+1).zfill(3)}.png'\r\n    image_path = os.path.join(download_path, image_name)\r\n    with open(image_path, 'wb') as handler:\r\n        handler.write(image_data)\r\n    print(f'Downloaded: {image_path}')\r\n \r\n# \u5173\u95edWebDriver  \r\ndriver.quit()<\/pre>\n<p>&nbsp;<\/p>\n<p>\u7f51\u9875\u4e2d\u56fe\u7247\u5728canvas\u4e2d\uff0c\u4e0d\u77e5\u9053\u56fe\u7247\u94fe\u63a5\u3002\u7528\u4e0b\u9762\u4ee3\u7801\u53ef\u4ee5\u5c1d\u8bd5\u4e0b\u8f7d\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>from selenium import webdriver from selenium.webdriver.common.by import By import base64 import io from PIL import Image&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13],"tags":[],"topic":[],"class_list":["post-250","post","type-post","status-publish","format-standard","hentry","category-python"],"_links":{"self":[{"href":"https:\/\/www.sangco.cn\/index.php?rest_route=\/wp\/v2\/posts\/250","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.sangco.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.sangco.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.sangco.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sangco.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=250"}],"version-history":[{"count":2,"href":"https:\/\/www.sangco.cn\/index.php?rest_route=\/wp\/v2\/posts\/250\/revisions"}],"predecessor-version":[{"id":252,"href":"https:\/\/www.sangco.cn\/index.php?rest_route=\/wp\/v2\/posts\/250\/revisions\/252"}],"wp:attachment":[{"href":"https:\/\/www.sangco.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=250"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.sangco.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=250"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.sangco.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=250"},{"taxonomy":"topic","embeddable":true,"href":"https:\/\/www.sangco.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftopic&post=250"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}