# 这个函数返回保存的PDF的文件路径
def pic2pdf(path, name, savepath = './temp/'):
    fs = os.listdir(path)
    # 删除非支持文件，并按照文件名排序
    for each in fs: 
        if ('.jpg' or '.png' or '.jpeg') not in each:
            fs.remove(each)
    fs = sorted(fs)
    # 寻找适合的画布大小
    # w = 0
    # h = 0
    # for each in fs:
    #     img = Image.open(path+each)
    #     iw, ih = img.size
    #     w = max(w,iw)
    #     h = max(h,ih)
    # 确定PDF的名称，并生成PDF
    f_pdf = savepath + name+'.pdf'
    c = canvas.Canvas(f_pdf)
    for each in fs:
        # (w, h) = landscape(A4)
        img = Image.open(path+each)
        c.setPageSize(img.size)
        # print(c._pagesize)
        c.drawImage(path+each, 0, 0, img.size[0], img.size[1])
        c.showPage()
    c.save()
    return f_pdf

@app.route('/get/<regex(".*"):url>')
def getimg(url):
    try:
        html = requests.get(url, headers = header, proxies = proxy).text

        soup = BeautifulSoup(html,'lxml')
        
        if 'Prev Page' in html:
            print('This is not the first page!')
            return "Error This may not the first page!"

        print(soup.title.string)
        name = str(soup.title.string)
        name = name[:name.find(' Page 1')]
        m = int(re.findall('(.*?)/(.*)',str(soup.find_all('td')[1].text))[0][1])
    except:
        return html

    para['title'] = name
    para['sn'] = ''.join(random.sample(string.ascii_letters + string.digits, 16))
    os.popen('mkdir temp/%s'%para['sn'])
    para['total'] = m
    lastR = render_template("down.html",
                            para = para)
    p = Process(target=download,args=(soup, m, para['sn'], ProcDict))
    p.start()
    return lastR