Author's brief introduction : Hello everyone , I'm an up and comer pig . Inner Mongolia University of science and technology , Sophomore Planning Department . Technology is good, but don't give up , Try to do the whole stack . Love development , Development software , Develop web site , Develop all kinds of things .️
️ Personal home page : The blog of self-motivated vegetable pig
Series column : This article is written in Website development special column ️ If there is something wrong with the knowledge of the article , Please correct me. ! Study with you and make progress together
If you think the blogger's article is good , Three companies, please + Pay attention to and support bloggers

One , Preface

Today can be said to be a day of rowing , Not a lot of things to do , Today's main attack , Baotou project that hasn't ended before , Recently, I want to finish this project as soon as possible , But there are two big problems in a row , Time is spent changing bug Yes .

Two ,dbm Database problems

This is an old problem . The ultimate reason is Linux System architecture and window The reason why the system does not fit , For a long time , Because of the large amount of code , There are many things you can't understand , It's been a long time dbm A rookie knows , Just managed to change this bug.
Problem finding ：

Property configuration failure , People are stupid, at that time . This is a very important function , I finished the conversion dbm The database found that this function cannot be used , and , I still can't use this function when I restore the original version on the server , I suspect there is a problem with this function before .

Problem solving ：
After my understanding of dbm Understanding and learning 【 It's still a rookie's understanding level 】 Because I can't use python Complete traversal , There are few online tutorials . There is no reference to see ！

import dbm

The above code explains ：
introduce dbm modular .

with dbm.open('config', 'c') as db:
    print('keys():', db.keys())

Open our named config Of dbm database , This database is very strange , It's strange that I've never seen such a database .
We have opened him in a way that we can all write .
Let's output the data in the database first key value

keys(): [b'btn_2', b'past_matchs', b'pw_nums', b'btn_3', b'btn_1', b'upload', b'btn_4', b'time', b'match', b'time_3_posts', b'btn_5', b'time_2_posts', b'match_name']

As shown above , We got all the data in this database key value , We observe these laws , Guess the meaning and function of their code 【 It's too difficult to take over other people's projects 】

for k in db.keys():
        print(k, db[k])

I try to clean them by mathematical modeling .

ha-ha , mentally .
I continue to study them , It was found that there was a format problem , I tried to convert them , After trying some methods .

 str(db[k],'utf-8')

That's ok , Ha ha, it's very simple .

b'past_matchs' ,2021| Baotou second cultural tourism creative works competition 
b'pw_nums' 3
b'upload' false
b'time' 2
b'match' 2021
b'time_3_posts' 
b'time_2_posts' 200
Process finished with exit code 0

Look at these words ：2021| Baotou second cultural tourism creative works competition .
Competition results , Upload work , Looking back , Judge entrance , Baotou second cultural tourism creative works competition .
It's time for me to draw again , I basically know the meaning , however , This traversal is incomplete , Not completely traversed out , In the final analysis, I am right dbm The format of the database is unclear .
Incomplete , I'm going to continue this problem tomorrow , Learn more about , Now traverse these things , Enough for me to find the previous property configuration failure bug.

db_config=dbm.open('config','c')

I try to use my own dbm To replace him .

Let's try the function .
To the routing layer , Find out the add operation .

db_config["past_matchs"] = db_config["past_matchs"].decode(
                        )+f",{value}|{request.form.get('match_name')}"

test , Basically completed , however bug It's a little bit big , Traversal is not complete now , Continue to study tomorrow , Keep doing it .

3、 ... and , Project cross domain interception processing

This bug, How do you say , It's tricky , I watched it for two days , Finally solved this bug.
But it exposed me to json Cross domain interception and cross domain problems , Preliminary contact , Although most studies are not in the right direction , But I basically learned .
That's the thing ：

Now I need to add a work , And then reported the wrong . Cross-domain problem , Storing pictures was rejected .
Then I just falsk Framework to study .
I think so js Cross domain problem solving

from flask_cors import CORS
app = Flask(__name__)
CORS(app, supports_credentials=True)

The method has been used all over , What's the use .

Problem solving ：

Because the previous server was mined , A new server ,ip Changed 、
Cross domain access cors The setting still only allows the previous ip visit oss.
I added a new rule , Problem solved .

... For two days because ip The question of rules .

However, we have initially touched on cross domain issues .