javascript - BeautifulSoup不返回Twitch.tv观看次数

我正在尝试使用Python在www.twitch.tv/directory上刮擦观众。我已经尝试了基本的BeautifulSoup脚本:

url= 'https://www.twitch.tv/directory'
html= urlopen(url)
soup = BeautifulSoup(url, "html5lib") #also tried using html.parser, lxml
soup.prettify()

这给了我html而没有显示实际的查看器编号。

然后我尝试使用param ajax数据。 From this thread

param = {"action": "getcategory",
        "br": "f21",
        "category": "dress",
        "pageno": "",
        "pagesize": "",
        "sort": "",
        "fsize": "",
        "fcolor": "",
        "fprice": "",
        "fattr": ""}

url = "https://www.twitch.tv/directory"
# Also tried with the headers parameter headers={"User-Agent":"Mozilla/5.0...
js = requests.get(url,params=param).json()

但是我收到了JSONDecodeError: Expecting value: line 1 column 1 (char 0)错误。

从那时起，我开始研究硒

driver = webdriver.Edge()
url = 'https://www.twitch.tv/directory'
driver.get(url)
#Also tried driver.execute_script("return document.documentElement.outerHTML") and innerHTML
html = driver.page_source
driver.close()
soup = BeautifulSoup(html, "lxml")

这些只是产生与我从标准BeautifulSoup调用中获得的结果相同的结果。

在刮除 View 计数的任何帮助将不胜感激。

最佳答案

首次加载页面时，该统计信息不存在。该页面向https://gql.twitch.tv/gql发出graphql请求以获取游戏数据。当用户未登录时，graphql请求将请求查询AnonFrontPage_TopChannels。

这是python中的工作要求:

import requests
import json

resp = requests.post(
    "https://gql.twitch.tv/gql",
    json.dumps(
        {
            "operationName": "AnonFrontPage_TopChannels",
            "variables": {"platformType": "all", "isTagsExperiment": True},
            "extensions": {
                "persistedQuery": {
                    "version": 1,
                    "sha256Hash": "d94b2fd8ad1d2c2ea82c187d65ebf3810144b4436fbf2a1dc3af0983d9bd69e9",
                }
            },
        }
    ),
    headers = {'Client-Id': 'kimne78kx3ncx6brgo4mv6wki5h1ko'},
)

print(json.loads(resp.content))

我已经在请求中包含了Client-Id。 id似乎不是 session 唯一的，但我想Twitch会使它们过期，所以这可能永远不会起作用。您将不得不检查将来的graphql请求，并在将来获取新的Client-Id，或者弄清楚如何以编程方式从页面中抓取一个。

该请求实际上似乎是“热门直播 channel ”部分。这是获取 View 计数和标题的方法:

edges = json.loads(resp.content)["data"]["streams"]["edges"]
games = [(f["node"]["title"], f["node"]["viewersCount"]) for f in edges]

# games:
[
    ("Let us GAME", 78250),
    ("(REBROADCAST) Worlds Play-In Knockouts: Cloud9 vs. Gambit Esports", 36783),
    ("RuneFest 2018 - OSRS Reveals !schedule", 35042),
    (None, 25237),
    ("Front Page of TWITCH + Fortnite FALL SKIRMISH Training!", 22380),
    ("Reckful - 3v3 with barry and a german", 20399),
]

您需要检查chrome网络检查器并找出其他请求的结构以获取更多数据。

这是目录页面的示例:

import requests
import json

resp = requests.post(
    "https://gql.twitch.tv/gql",
    json.dumps(
        {
            "operationName": "BrowsePage_AllDirectories",
            "variables": {
                "limit": 30,
                "directoryFilters": ["GAMES"],
                "isTagsExperiment": True,
                "tags": [],
            },
            "extensions": {
                "persistedQuery": {
                    "version": 1,
                    "sha256Hash": "75fb8eaa6e61d995a4d679dcb78b0d5e485778d1384a6232cba301418923d6b7",
                }
            },
        }
    ),
    headers={"Client-Id": "kimne78kx3ncx6brgo4mv6wki5h1ko"},
)

edges = json.loads(resp.content)["data"]["directoriesWithTags"]["edges"]
games = [f["node"] for f in edges]

关于javascript - BeautifulSoup不返回Twitch.tv观看次数，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/52681511/