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Original text: . net core webapi jwt more refreshing authentication My way is not mainstream, but I can control it more flexibly. My favorite friend may as well take a moment to learn jwt authentication is divided into two parts. The first part is encryption and decryption. The second part is flexible application to middleware. My processing m ...

Summary The example of connecting to Alibaba cloud Internet of things platform based on open-source MQTT Client Java and Python language is introduced in the previous section. Here, M2Mqtt Client C is used for testing, combining with the up and down of custom Topic demonstration message. Operation steps 1, installation M2Mqtt 2,Code s ...

First, introduce some basic operations of SQL database: 1 create 2 delete 3 write 4 update (modify) 5 condition selection With the above basic operations, you can establish and store a simple database.   Release the code called by python: here is calling dos to operate the database, which is not as simple as the following # -*- coding: u ...

Catalog Zero, code Xian inspirational I. running in Linux II. Running in Hadoop environment Zero, code Xian inspirational I. running in Linux First, create the following directory in Linux, do not put anything in it, and then enter the directory /home/hadoopuser/mydoc/py Then create a ddd.txt file in it Write the foll ...

I learned a lot when I climbed this website and got a better understanding of the basic knowledge of python. First, the usage of. join. It's better to handle the crawled text. Then, the following:: usage of xpath is used. It takes all peers behind the node, which is very easy to use. Then there's a puzz ...

Dex file structure File header typedef struct { u1 magic[MAGIC_LENGTH]; /* includes version number */ u4 checksum; /* adler32 Verify remaining length files */ u1 signature[kSHA1DigestLen]; /* SHA-1 Document signature */ u4 fileSize; /* length of entire file */ u4 headerSize; /* offs ...

In the development process, it is often necessary to read the configuration files under the resources directory. Most of them are automatically read by the framework. If we read them manually, how can we read them? Here are three ways to read the properties file that I summarized: Read configuration file based on InputStreamGet it through the P ...

Password Generato Recently, referring to some password generators on the Internet, a similar password generator has been imitated. The password is mainly composed of "uppercase", "lowercase", "number" and "symbol". The specific style is as follows: development process This paper mainly records the js de ...

Website address: http://www.17500.cn/p5/all.php 1. Create a new crawler project scrapy startproject pfive 2. Create a new crawler in spiders directory scrapy genspider pfive_spider www.17500.cn 3. Modify the entry url in the crawler file start_urls = ['http://www.17500.cn/p5/all.php'] 4. Add crawling entry class PfiveItem ...

Query users by id sql used: SELECT * FROM `user` WHERE id = 1 Add the select tag in user.xml and write sql: <?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <!-- namespace: Namespace, for isolation sql， ...