Simple solution of small up main lottery in station B

B Station small UP Easy solution for the main lottery

Hello everyone , I am a b standing UP Lord A thunder hill , This is for me 2020 year 12 month 30 Japanese video 《 Easily solve small UP Main lottery puzzle 》 Project analysis for , Video address ：https://www.bilibili.com/video/BV12A411p76j

B Station related API How to find and use

At the beginning of the project , My idea is to use requests The crawler crawls , Reuse beautifulsoup Analyze , The problem lies in b The front end of the station is dynamically rendered , There is no page switching , It's not easy to use reptiles （ Unless used selenium, But this is not suitable for the backend ）. When I was distressed, I unexpectedly found a summary b standing API The article , While checking by yourself b After standing on the website structure, I found b The front-end information of the station is almost API To obtain the , For example, fan list , When you click it, you will have the... As shown in the figure API Access information .

Main function realization

The project is mainly composed of python To write , So choose requests Ku initiated API request ,json Library processing json data ,flask As the back end of web pages , The server side uses Nginx Reverse proxy from 80 Port proxy to intranet 5000 port .

1.BV No. reverse check AV Number

def BV2AV(bv_number):
    url = f"https://api.bilibili.com/x/web-interface/view?bvid={bv_number}"
    req = requests.get(url)
    return json.loads(req.text)["data"]["aid"]

2.UID Check the user's nickname

def mid2username(mid):
    url = f"https://api.bilibili.com/x/space/acc/info?mid={mid}&jsonp=jsonp"
    req = requests.get(url)
    name = json.loads(req.text)["data"]["name"]
    return name

3. Get a list of all comments

def video_floor(bv_number):
    av_number = BV2AV(bv_number)
    page = 1
    url = f"https://api.bilibili.com/x/v2/reply?&type=1&pn={page}&oid={av_number}"
    req = requests.get(url)
    json_file = json.loads(req.text)
    all_comment = []
    #  Total comments 
    comment_number = json_file["data"]["page"]["count"]
    #  Count the number of comment pages 

    comment_page = comment_number // 20 + 1
    for page in range(1, comment_page + 1):
        url = f"https://api.bilibili.com/x/v2/reply?&type=1&pn={page}&oid={av_number}"
        req = requests.get(url)
        json_file = json.loads(req.text)
        comments = json_file["data"]["replies"]
        all_comment = all_comment + comments
    return all_comment

4. Check UID Prevent repeated comments

def check_mid(all_comment):
    MID_list = []
    for each_comment in all_comment:
        mid_tmp = each_comment["member"]["mid"]
        if(MID_list.count(mid_tmp) == 0):
            MID_list.append(mid_tmp)
    return MID_list

5. Check if someone is paying attention UP Lord ( The function is not yet complete )

The reason why this function is not completed is B The site does not allow unrestricted access to the following list API, Only the first five pages can be accessed , After several visits, there was a ban IP act , Follow up b Is there anything else you can replace API, Otherwise, this function can only be a semi-finished product .

def check_subscibe(mid, up_mid):
    print(f" Checking {mid} Are you paying attention to {up_mid}")
    subscribe_list = []
    flag = False
    page = 1
    url = f"https://api.bilibili.com/x/relation/followings?vmid={mid}&pn={page}&ps=20"
    req = requests.get(url)
    subscribe_number = json.loads(req.text)["data"]["total"]
    page_number = subscribe_number // 50 + 1
    for page in range(1, min(page_number + 1, 5)):
        url = f"https://api.bilibili.com/x/relation/followings?vmid={mid}&pn={page}&ps=50"
        req = requests.get(url)
        json_tmp = json.loads(req.text)
        if(json_tmp["data"]["list"] != None):
            subscribe_list_tmp = json_tmp["data"]["list"]
            subscribe_list += subscribe_list_tmp
    for each_subscribe in subscribe_list:
        if(each_subscribe["mid"] == up_mid):
            flag = True
            return flag
    return flag

The overall situation of the project

To view the whole project, please move github,
Project address ：https://github.com/Tessgraymane/bilibili_lottery/