python学习(28) Tinker+BeautifulSoup+Request抓取美女壁纸

抓取准备

今天是10月24日，祝所有程序员节日快乐。今天打算写个爬虫抓取3DMGAME论坛美女cosplay壁纸。
论坛首页网址为https://www.3dmgame.com/tu_53_1/
我们点击其中一个图集，然后网页跳转，看下源码

<div class="dg-wrapper">
    <a data-src = "/uploads/images/thumbpicfirst/20190730/1564452665_126346.jpg">
    <div class="img"><img src="https://img.3dmgame.com/uploads/images/thumbpicfirst/20190730/1564452665_126346.jpg"></div>
    <div class="miaoshu">
        <p></p>
    <div class="num"><i></i> /<u></u></div>
    </div>
    </a>
    <a data-src = "/uploads/images/thumbpicfirst/20190730/1564452665_242197.jpg">
    <div class="img"><img src="https://img.3dmgame.com/uploads/images/thumbpicfirst/20190730/1564452665_242197.jpg"></div>
    <div class="miaoshu">
    <p></p>
    <div class="num"><i></i> /<u></u></div>
    </div>
    </a>

网址是静态的，我们直接提取其中的图片链接再下载即可。
抓取网页采用的是python的requests库，直接发送http请求即可。收到回包后，通过BeautifulSoup提炼其中图片地址再次下载即可。
另外我们的界面用的是python自带的Tinker编写的。

代码实现

实现线程装饰器

def thread_run(func):
    def wraper(*args, **kwargs):
        t = threading.Thread(target=func, args=args, kwargs=kwargs)
        t.daemon = True
        t.start()

    return wraper

封装了一个装饰器，启动线程并调用传入的函数。

我们实现了DownloadFrame类

类里实现如下方法

def prepare(self, downloadlinks):
        self.flag = True
        self.downloadlinks = downloadlinks
        self.base_url =   self.downloadlinks

        fail = 0

        try:
            url = self.base_url
            result = requests.get(url, headers=HEADERS,timeout=10)
            restxt = result.content.decode('UTF-8')
            soup = BeautifulSoup(restxt,'lxml')
            titles = soup.select('div .bt')
            if titles is None or len(titles)==0:
                print("html page res not found ! \n")
                return
            title = re.split(r'[;,\s]',titles[0].text)[0]
            curdir = os.path.dirname(os.path.abspath(__file__))
            picpath = os.path.join(curdir,title)
            if not os.path.exists(picpath):
                os.mkdir(picpath)
            print(picpath)
            imglist = soup.select('.dg-wrapper img')
            if imglist is None or len(imglist)==0:
                print("html page res not found ! \n")
                return
            self.downloadPic(imglist,picpath)
        except Exception as e:
            print(e)
            time.sleep(3)

prpare函数实现了请求指定网页，并用BeautifulSoup处理回包的功能。

@thread_run
    def download(self, url, path):
        try:
            if lock.acquire():
                self.name += 1
                imgname = str(self.name)+'.'+url.split('.')[-1]
                filename = os.path.join(path,imgname)
                lock.release()
                print(url)
                print(filename)
                # res = requests.get(url,  headers=header  )
                res = requests.get(url, headers=HEADERS,timeout=10 )
                with open(filename, 'wb') as f:
                    f.write(res.content)
            # 下载完后检查是否完成下载
            if lock.acquire():
                if self.flag:
                    self.flag = False
                    messagebox.showinfo("提示", "下载完成")
                lock.release()


        except Exception as e:
            print(e)

download传给了我们之前封装的装饰器thread_fun, download实现了下载指定图片的功能。

效果展示

下载图片

感谢关注我的公众号

源码下载

https://github.com/secondtonone1/python-/tree/master/%E7%88%AC%E8%99%AB%E5%AE%9E%E6%88%98%E9%A1%B9%E7%9B%AE/%E6%8A%93%E5%8F%963DGAME%E8%AE%BA%E5%9D%9B%E5%A3%81%E7%BA%B8
也可以阅读原文下载