“Solution to double partition Alphametics”, Knuth Donald, The Art of Computer Programming, Pre-Fascicle 2b, Generating All Permutations, Addison-Wesley, 12 June 2004, p. 42. http://www-cs-faculty.stanford.edu/~knuth/taocp.html#vol4
From https://github.com/devwebcl/spring-samples
This simple sample to hash password using blowfish2a compatible with Postgres pgcrypto https://www.postgresql.org/docs/9.3/static/pgcrypto.html
It uses sample from http://docs.spring.io/spring-security/site/docs/current/apidocs/org/springframework/security/crypto/bcrypt/BCrypt.html
En gramática, una apócope (del griego apokopé < apokopto, "cortar") es un metaplasmo
donde se produce la pérdida o desaparición de uno o varios fonemas o
sílabas al final de algunas palabras. Cuando la pérdida se produce al
principio de la palabra se denomina aféresis, y si la pérdida tiene lugar en medio de la palabra se llama síncopa. Es una figura de dicción según la preceptiva tradicional.
Pasos swagger:
We need to have installed the following tools: swagger2markup and asciidoctor
$ cat index.adoc
:doctype: book
:toc: left
:toclevels: 3
:numbered:
:hardbreaks:
:sectlinks:
:sectanchors:
include::./overview.adoc[]
include::./paths.adoc[]
include::./security.adoc[]
include::./definitions.adoc[]
https://stackoverflow.com/questions/21981796/cannot-ping-aws-ec2-instance
Add a new EC2 security group inbound rule:
Technical proofed/reviewed:
https://www.manning.com/liveproject/create-an-open-banking-app-using-openapis-and-spring-boot
Sometimes we need to clone an object in Java, but not a reference (a junior developer may use). There are several ways to achieve this task; however, I recommend to use a copy-constructor (that comes from C++) and, in particular, using @Builder from Lombok (to avoid boilerplate code))
Curl, the wget with steroids. https://curl.se/
1. response headers
curl -I http://localhost:8081/customers
2. gzip call
Content-Encoding: gzip
Content-Type: application/json
curl -v -H "Content-Type: application/json" -H "Accept-Encoding: gzip" http://127.0.0.1:8080/fourkb -o four.json.gz
curl -v --compressed
-verbose
3. curl get
curl -k --max-time 30 -X GET 'https://10.10.10.31:8080/rest/accounts?user=test&password=test&channel=1&client-ID=1020'
--request GET
4. curl post body:
curl -k --request POST 'https://10.10.10.31:8080/rest/num-accounts' --header 'Content-Type: application/json' --data-raw '{"user":{"user":"testuser","password":"welcome1","request-channel":1},"client-ID":"12345"}'
-d '{"query":{"match_all":{}}}'
-d, --data <data>
5. ssl
to avoid self-signed cert:
-k
curl --cacert cacert.pem https://self-signed.badssl.com
6. cookie
--cookie "jsessionid=123"
7. timeout
--max-time 30
8. header
curl -H "Authorization: Basic YXBpdXNlcjphcGlwd2Q=" http://devweb.cl/status
9. basic user?
--basic --user "redemption-br:GUkboMIZ"
10. for brackets
curl -g
otherwise:
curl: (3) bad range in URL position 47:
11. download
-O -J
curl -k -O -J https://www.devweb.cl/file.txt
12. linux/windows
linux:
curl -X POST http://172.18.235.19:8773/api/v1/publishEvent --header 'Content-Type: application/json' --data-raw '{"user":{"user":"testuser","team":"welcome1","request-channel":1},"client-ID":"12345"}'
windows:
curl -X POST http://127.0.0.1:8773/api/v1/publishEvent --header "Content-Type: application/json" --data-raw "{\"user\":{\"user\":\"testuser\",\"team\":\"welcome1\",\"request-channel\":1},\"client-ID\":\"12345\"}"
The concept of API integrations is broad. This must consider a function and non-functional requirements (today called quality attributes).
There several ways to integrate to an API
One way that integrating with third-party, or partner, APIs can be easier is by using a client or SDK. API clients handle much of the overhead when interacting with an API. They can handle common tasks like:
Track performance
The work isn’t over once you set up your API integrations. While we all would like to “set and forget” an integration, the truth is that any dependency is also a liability. You can start by monitoring your API usage. Specifically, here are the metrics we think are the most important:
