Postgrest: the REST API for PostgreSQL databases
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The document discusses Postgrest, a REST API for PostgreSQL databases. Postgrest allows developers to build applications that retrieve and manipulate data directly from a PostgreSQL database via RESTful endpoints, without needing a separate backend application. It handles authentication, authorization, and other tasks to securely expose the database through REST. Postgrest aims to reduce complexity by removing the need for additional backend code and instead providing a standards-compliant REST API directly on the database.
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Postgrest parameters/optionsPostgrest parameters/options
Usage: postgrest DB_URL (-a|--anonymous ROLE) [-s|--schema NAME]
[-p|--port PORT] [-j|--jwt-secret SECRET] [-o|--pool COUNT]
[-m|--max-rows COUNT]
PostgREST 0.3.2.0 / create a REST API to an existing Postgres database
Available options:
-h,--help Show this help text
DB_URL (REQUIRED) database connection string, e.g.
postgres://user:pass@host:port/db
-a,--anonymous ROLE (REQUIRED) postgres role to use for non-
authenticated requests
-s,--schema NAME schema to use for API routes (default: "public")
-p,--port PORT port number on which to run HTTP
server (default: 3000)
-j,--jwt-secret SECRET secret used to encrypt and decrypt JWT
tokens (default: "secret")
-o,--pool COUNT max connections in database pool (default: 10)
-m,--max-rows COUNT max rows in response (default: "infinity")](https://image.slidesharecdn.com/nobackend-161216135217/85/Postgrest-the-REST-API-for-PostgreSQL-databases-12-320.jpg)
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- 1. PGDay.IT 2016 – 13 Dicembre 2016 - Prato 1 di 24 Postgrest: la REST API per i database PostgreSQL Lucio Grenzi [email protected]
- 2. PGDay.IT 2016 – 13 Dicembre 2016 - Prato 2 di 24 Who is this guy? Delphi developer since 1999 IT Consultant Front end web developer Postgresql addicted Nonantolando.blogspot.com lucio.grenzi lucio grenzi
- 3. PGDay.IT 2016 – 13 Dicembre 2016 - Prato 3 di 24 AgendaAgenda NoBackend: what and why Postgresql: advantages Postgrest features
- 4. PGDay.IT 2016 – 13 Dicembre 2016 - Prato 4 di 24 NobackendNobackend noBackend is an approach to decouple apps from backends, by abstracting backend tasks with frontend code. This allows frontend developers to focus on user experience and gives backend developers more flexibility on the implementation side. nobackend.org
- 5. PGDay.IT 2016 – 13 Dicembre 2016 - Prato 5 di 24 Our purposeOur purpose Create apps / webapps that don't need a backend at all Writing business logic often duplicates, ignores or hobbles database structure A single declarative source of truth: the data itself How? Using a REST API on top of your database
- 6. PGDay.IT 2016 – 13 Dicembre 2016 - Prato 6 di 24 Build a backend in right wayBuild a backend in right way SSL to rest api always! Different schema to different port Implement only what you need Use webserver to route in the right way Authentication done by JWT Row level security feature introduced from Postgresql 9.5
- 7. PGDay.IT 2016 – 13 Dicembre 2016 - Prato 7 di 24 Why schemas?Why schemas? It allows many users to use one database without interfering with each other. It organizes database objects into logical groups to make them more manageable. Thirdparty applications can be put into separate schemas so they do not collide with the names of other objects.
- 8. PGDay.IT 2016 – 13 Dicembre 2016 - Prato 8 di 24 Why PostgresqlWhy Postgresql Versatility json support Custom languages (Plv8) Lots of extensions MVC logic inside the database
- 9. PGDay.IT 2016 – 13 Dicembre 2016 - Prato 9 di 24 MVCMVC MVC is an architectural design pattern that encourages improved application organization through a separation of concerns. It enforces the isolation of business data (Models) from user interfaces (Views), with a third component (Controllers) traditionally managing logic, userinput, and coordination of Models and Views. Developing Backbone.js Applications By Addy Osmani
- 10. PGDay.IT 2016 – 13 Dicembre 2016 - Prato 10 di 24 Build an applicationBuild an application Focus on client related tecnology Pick a frontend framework
- 11. PGDay.IT 2016 – 13 Dicembre 2016 - Prato 11 di 24 PostgrestPostgrest Cleaner and a more standards compliant API Quick to get started Nothing to install Nothing to configure Exchange data json format Postgresql + Postgrest: combination that can give you a way to expose your data to other applications or web frontends.
- 12. PGDay.IT 2016 – 13 Dicembre 2016 - Prato 12 di 24 Postgrest parameters/optionsPostgrest parameters/options Usage: postgrest DB_URL (-a|--anonymous ROLE) [-s|--schema NAME] [-p|--port PORT] [-j|--jwt-secret SECRET] [-o|--pool COUNT] [-m|--max-rows COUNT] PostgREST 0.3.2.0 / create a REST API to an existing Postgres database Available options: -h,--help Show this help text DB_URL (REQUIRED) database connection string, e.g. postgres://user:pass@host:port/db -a,--anonymous ROLE (REQUIRED) postgres role to use for non- authenticated requests -s,--schema NAME schema to use for API routes (default: "public") -p,--port PORT port number on which to run HTTP server (default: 3000) -j,--jwt-secret SECRET secret used to encrypt and decrypt JWT tokens (default: "secret") -o,--pool COUNT max connections in database pool (default: 10) -m,--max-rows COUNT max rows in response (default: "infinity")
- 13. PGDay.IT 2016 – 13 Dicembre 2016 - Prato 13 di 24 Postgrest - securityPostgrest - security PostgREST is designed to keep the database at the center of API security All authorization happens through database roles and permissions Use json web sockets to authenticate API request authenticate with external services
- 14. PGDay.IT 2016 – 13 Dicembre 2016 - Prato 14 di 24 Postgrest – security with no jwtPostgrest – security with no jwt If no JWT is present it the role is invalid it does not contain the role claim SET LOCAL ROLE anonymous;
- 15. PGDay.IT 2016 – 13 Dicembre 2016 - Prato 15 di 24 Postgrest – security with jwtPostgrest – security with jwt CREATE ROLE authenticator NOINHERIT LOGIN; CREATE ROLE anonymous; GRANT anonymous TO authenticator; postgrest postgres://pgday@localhost:5432/pgday anonymous anon
- 16. PGDay.IT 2016 – 13 Dicembre 2016 - Prato 16 di 24 Postgrest - performancesPostgrest - performances Web application written in Haskell using Warp http server It delegates as much calculation as possible to the database Serializing JSON responses directly in SQL Data validation Authorization
- 17. PGDay.IT 2016 – 13 Dicembre 2016 - Prato 17 di 24 Postgrest - VersioningPostgrest - Versioning A longlived API needs the freedom to exist in multiple versions PostgREST does versioning through database schemas
- 18. PGDay.IT 2016 – 13 Dicembre 2016 - Prato 18 di 24 API matchesAPI matches POST ~ INSERT GET ~ SELECT PATCH ~ UPDATE PUT ~ UPSERT DELETE ~ DELETE Auth ~ user roles
- 19. PGDay.IT 2016 – 13 Dicembre 2016 - Prato 19 di 24 API callsAPI calls GET /customer?select=name, age, city,nation POST /customer name, age, city,nation John,40,Boston,USA
- 20. PGDay.IT 2016 – 13 Dicembre 2016 - Prato 20 di 24 Try postgrestTry postgrest Source: https://github.com/begriffs/postgrest/ Docker image https://hub.docker.com/r/begriffs/postgrest/ Heroku Postgrest: http://postgrest.com/
- 21. PGDay.IT 2016 – 13 Dicembre 2016 - Prato 21 di 24 Postgrest clientPostgrest client PostgREST JavaScript client provides bindings and features to be used with PostgREST APIs. Install with NPM in your project‘s folder. $ npm install postgrestclient var PostgREST = require('postgrestclient') var Api = new PostgREST('https://postgrest.pgday.it')
- 22. PGDay.IT 2016 – 13 Dicembre 2016 - Prato 22 di 24 Similar tool to PostgrestSimilar tool to Postgrest PgREST http://pgre.st/ a JSON document store PostGraphQL https://github.com/calebmer/postgraphql a GraphQL schema created over a PostgreSQL schema
- 23. PGDay.IT 2016 – 13 Dicembre 2016 - Prato 23 di 24 Questions?Questions?
- 24. PGDay.IT 2016 – 13 Dicembre 2016 - Prato 24 di 24