2022

Dec 10, 2022

GitHub Client Requires Username to Clone Even Authenticated

Problems

I Installed the GitHub client and authenticated with https using gh auth login. But when I am trying to clone a repository, it prompt me to input username and password for github.com like the following,

Bash

root@vm:~# gh repo clone <repo>
Cloning into '<repo>'...
Username for 'https://github.com':

Dec 9, 2022

Calculate the Fingerprint for a Certificate

We can run the following command to calculate the fingerprint for a certificate public key.

Bash

openssl x509 -fingerprint -sha256 -in /path/to/certifiacte/pem

It will show the fingerprint like,

Bash

root@Debian-11:~# openssl x509 -fingerprint -sha256 -in /etc/ssl/domain/pub.pem
SHA256 Fingerprint=7C:28:F2:79:D5:65:67:B0:A8:BC:AF:8A:DC:ED:63:9D:7F:D9:63:06:6E:B4:FD:05:4F:F1:1E:F9:7D:7F:1D:BD
...

Dec 9, 2022

Generate a self-signed Certificate for a Domain

We can use openssl to generate a self-signed certificate for a domain for testing puspose, and use it for Nginx or any other tools.

The following command are used to generate.

Bash

sudo mkdir /etc/ssl/domain

sudo openssl req -x509 -nodes -days 3650 -newkey rsa:4096 -keyout /etc/ssl/domain/private.pem -out /etc/ssl/domain/public.pem

It will ask several questions, you should be carefull with the common name, usually, input the domain name.

Dec 9, 2022

Route Based on TLS SNI in Nginx

Context

Users want to host two or more website with different domain name on one VM using nginx.

Solution

Dec 9, 2022

Trust Self-signed certificate in sles15

Problems

When connecting a repository with self-signed certificate in Sles15, the curl will complain it can't verify the repository host with certificate error.

Solution

Dec 1, 2022

Dynamic Set Jenkins Plugin Start Parameters

Context

Recently, one of our Jenkins job which running inside docker got exception regarding to the durable task plugin.

Bash

20:07:29  process apparently never started in /path/workspace/durable-181c4c30
20:07:29  (running Jenkins temporarily with -Dorg.jenkinsci.plugins.durabletask.BourneShellScript.LAUNCH_DIAGNOSTICS=true might make the problem clearer)
20:07:29  Cannot contact Nodexxx: java.io.FileNotFoundException: /path/workspace/durable-181c4c30/output.txt (No such file or directory)

Nov 27, 2022

Specify the Sequence Name When Creating Table in Postgres

Context

In a Spring boot project, using JPA to access database, using flyway to migrate database.

Problem

By default, when creating a table in Postgres with a generated column, it's name will be <table>_<column>_seq, but the JPA will try to find the sequence with name <table>_seq. So, the JPA will complain that it can't find the sequence.

Solution

Nov 18, 2022

Add Global API Prefix For Rest API in Spring Boot

For a service application, a global API prefix is required.

For example, we want that all the api have a prefix such as api, and we can achieve this by adding the following configuration in application.properties.

Properties

server.servlet.context-path=/api

Now, all rest API will have the prefix api.

Nov 18, 2022

Customize 404 Error Response for Rest API in Spring boot

By default, the Spring boot will return a whitelabel error page, but as a rest API server, it's better to return a JSON response to user like a normal API response.

For example, the GitHub rest API will return a JSON and when the resouce is not found.

Bash

curl https://api.github.com/hub
{
    "message": "Not Found",
    "documentation_url": "https://docs.github.com/rest"
}

Nov 14, 2022

Customize Typora Theme to Use Full View

By default, the Typora editor doesn't use all the avaliable space of the view.

But we can customize the Typora theme to let editor use 100% the view.

Open the theme folder
Create base.user.css with content
CSS
```
#write {
    max-width: none;
}
```
Now, close and reopen the Typora, you'll see it use all views.