下载QQ音乐付费歌曲升级代码

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/apollo_miracle/article/details/84865350

1 超时参数的使用

在平时网上冲浪的过程中，我们经常会遇到网络波动，这个时候，一个请求等了很久可能仍然没有结果

对应的，在爬虫中，一个请求很久没有结果，就会让整个项目的效率变得非常低，这个时候我们就需要对请求进行强制要求，必须在特定的时间内返回结果，否则就报错

使用方法如下：

response = requests.get(url,timeout=3)

通过添加timeout参数，能够保证在3秒钟内返回响应，否则会报错

2 retrying模块的使用

上述方法能够加快我们整体的请求速度，但是在正常的网页浏览过成功，如果发生速度很慢的情况，我们会做的选择是刷新页面，那么在代码中，我们是否也可以刷新请求呢？

对应的，retrying模块就可以帮助我们解决

使用方法如下：

import requests
from retrying import retry

@retry(stop_max_attempt_number=3)  # 最大重试3次，3次全部报错，才会报错
def _parse_url(url)
    response = requests.get(url, headers=headers, timeout=3)  # 超时的时候回报错并重试
    assert response.status_code == 200  # 状态码不是200，也会报错并重试
    return response

def parse_url(url)
    try:  # 进行异常捕获
        response = _parse_url(url)
    except Exception as e:
        print(e)
        response = None
    return response

3 下载QQ音乐付费歌曲代码升级

详细代码书写过程点击查看 ☞ https://blog.csdn.net/apollo_miracle/article/details/84852254

import json
import sys

import requests
from retrying import retry


class QQMusic(object):
    def __init__(self):
        self.headers = {
            "User-Agent": "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36",
            "referer": "https://y.qq.com/n/yqq/playlist/5836559239.html"
        }
        # 获取songmid 的 url
        self.get_songmid_url = "https://c.y.qq.com/v8/fcg-bin/fcg_v8_singer_track_cp.fcg?singermid=003UjO1f3dJMRT&order=listen&begin=0&num=30&songstatus=1"
        # 获取purl 的 url
        self.purl_temp = 'https://u.y.qq.com/cgi-bin/musicu.fcg?data={"req_0":{"module":"vkey.GetVkeyServer","method":"CgiGetVkey","param":{"guid":"7208009084","songmid":["%s"],"songtype":[0],"uin":"0","loginflag":1,"platform":"20"}}}'
        # 获取歌曲 的 url
        self.url_temp = "http://124.203.224.158/amobile.music.tc.qq.com/"
        # 代理
        self.proxies = {"https": "https://118.122.92.252:37901"}

    # 最多尝试6次
    @retry(stop_max_attempt_number=6)
    def _get_songmid(self):
        """获取songmid参数"""
        # 发送请求，获取响应 3s之内没有回应就强制结束
        resp = requests.get(self.get_songmid_url, headers=self.headers, proxies=self.proxies, timeout=3)
        # 将获取结果进行解码
        url_str = resp.content.decode()
        # 转化为字典格式
        dict_str = json.loads(url_str)
        # 获取数据信息列表
        song_list = dict_str["data"]["list"]
        # 遍历列表获取songmid、songname
        name_mid_list = []
        for name_mid in song_list:
            name_mid_dict = {}
            name_mid_dict["song_name"] = name_mid["musicData"]["songname"]
            name_mid_dict["song_mid"] = name_mid["musicData"]["songmid"]
            name_mid_list.append(name_mid_dict)
        return name_mid_list

    def get_songmid(self):
        try:
            name_mid_list = self._get_songmid()
        except Exception as e:
            print(e)
            name_mid_list = None
        return name_mid_list

    # 最多尝试6次
    @retry(stop_max_attempt_number=6)
    def _get_purl(self, songmid):
        """获取purl参数"""
        # 拼接purl
        purl = self.purl_temp % songmid
        # 发送请求，获取响应 3s之内没有回应就强制结束
        resp = requests.get(purl, headers=self.headers, proxies=self.proxies, timeout=3)
        # 对结果进行解码
        ret_json = resp.content.decode()
        # 转化为字典
        ret_dict = json.loads(ret_json)
        # 获取purl
        purl = ret_dict["req_0"]["data"]["midurlinfo"][0]["purl"]
        # 返回数据
        return purl

    def get_purl(self, songmid):
        try:
            purl = self._get_purl(songmid)
        except Exception as e:
            print(e)
            purl = None
        return purl

    # 最多尝试6次
    @retry(stop_max_attempt_number=6)
    def _parse_url(self, purl):
        """下载数据"""
        # 拼接url
        url = self.url_temp + purl
        # 发送请求，获取响应 30s之内没有回应就强制结束
        resp = requests.get(url, headers=self.headers, proxies=self.proxies, timeout=30)
        # 返回数据
        return resp.content

    def parse_url(self, purl):
        try:
            content = self._parse_url(purl)
        except Exception as e:
            print(e)
            content = None
        return content

    def save_music(self, songname, content):
        """保存歌曲"""
        with open("./music/" + songname + ".m4a", "wb") as f:
            f.write(content)
        # 下载结束
        print(songname, "download over!")

    def run(self):  # 实现主要逻辑
        # 1.获取songmid、songname等参数
        name_mid_list = self.get_songmid()
        # 判断是否获取到songmid、songname等参数
        if not name_mid_list:
            print("获取songmid、songname等参数失败！")
            # 强制退出
            sys.exit()
        # 2.遍历获取purl
        for name_mid in name_mid_list:
            songname = name_mid["song_name"]
            songmid = name_mid["song_mid"]
            purl = self.get_purl(songmid)
            # 判断是否获取到purl 参数
            if not purl:
                print(songname, "下载失败！")
                continue
            # 3.发送请求，获取响应
            content = self.parse_url(purl)
            # 判断是否返回数据
            if not content:
                print(songname, "下载失败！")
                continue
            # 4.保存数据
            self.save_music(songname, content)


if __name__ == '__main__':
    music = QQMusic()
    music.run()

成果展示：