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zalando avatar

zalando/connexion

0
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4,600 stars·784 forks·Python·Apache-2.0·18 viewsconnexion.readthedocs.io/en/latest↗

Connexion

Connexion is a specification-driven framework for building APIs that automatically maps OpenAPI specifications to application logic. It uses these specifications to automate routing, request validation, and response serialization, linking API operations to backend handler functions via operation IDs.

The project differentiates itself by providing a schema-driven mock server that simulates API behavior using example responses from the specification without requiring backend logic. It also includes a dynamic documentation hosting system that translates the API specification into a live interactive console for exploring and testing endpoints.

The framework covers broad capability areas including security enforcement through middleware-based authentication and scope validation, pluggable request and response validation logic, and automated parameter injection into typed function arguments. It also provides utilities for application lifespan management, custom middleware integration, and request simulation for testing.

The project can be used to bootstrap standalone web applications or wrapped around existing frameworks to add specification-driven capabilities.

Features

  • Automatic Route Registration - Automatically maps API endpoints to handler functions by parsing an OpenAPI specification file at startup.
  • Specification-Driven Registrations - Automatically maps API endpoints to backend handler functions by parsing the OpenAPI specification at startup.
  • API Payload Serializers - Converts internal data types into network responses conforming to the content types defined in the API specification.
  • Request Validation - Validates incoming request parameters and payloads against a schema to ensure required data is present.
  • Specification-Driven Registrations - Uses a specification to automate the registration of routes, validation rules, and response serialization.
  • Request Contexts - Provides thread-safe storage for sharing request-scoped data and matched operation metadata across functions.
  • API Route Prefixes - Defines URL path prefixes to version APIs and align clients and servers on service locations.
  • API Access Security - Checks incoming requests against security definitions in the specification to ensure authorized access.
  • API Authentication - Enforces endpoint access restrictions by verifying credentials against the API specification.
  • Request Authentication Middleware - Uses middleware to validate authentication credentials and scopes against the security requirements of the specification.
  • Request Context Injection - Injects operation IDs, base paths, and authenticated user metadata into the runtime request context for handler use.
  • Response Schema Validators - Checks that response bodies and headers match the schema defined in the API specification.
  • Security Logic Decoupling - Decouples security checks from application logic by automating authentication based on the API specification.
  • API Traffic Validation - Validates both incoming requests and outgoing responses against the defined API specification.
  • API Response Serializers - Converts objects into the format defined in the API specification before sending them to the client in the product.
  • API Response Validations - Verifies that the data returned by the server conforms to the schema promised in the API specification in the product.
  • Automatic Parameter Injection - Extracts and casts path, query, and body parameters directly into typed function arguments for handlers.
  • Bidirectional Specification Validation - Ensures that both incoming request data and outgoing response bodies strictly adhere to the API specification.
  • Operation ID Handler Mapping - Links specific API operations to Python functions by matching the operation IDs defined in the specification.
  • Operation ID Mappings - Links API operations to backend functions using the operation IDs defined in the OpenAPI specification.
  • Request Parameter Binding - Maps HTTP request parameters and bodies directly into strongly typed function arguments.
  • Request Schema Validators - Provides automatic request validation by ensuring incoming data conforms to the OpenAPI specification schemas.
  • Response Serialization - Automatically converts returned Python objects into the network format required by the API specification.
  • Typed Path Parameter Decoders - Parses URL path parameter strings into typed primitives with automatic validation before they reach handlers.
  • Method-Based Handler Binding - Binds specific HTTP methods and URL paths to backend handler functions automatically.
  • Interactive API Explorers - Includes a browser-based environment for testing and discovering API capabilities through a visual interface.
  • Interactive API Documentation Servers - Ships a built-in server that hosts interactive Swagger UI or ReDoc documentation from a specification file.
  • Security Scheme Validators - Implements identity verification using registered functions or remote URLs as defined by the API's security requirements.
  • API Reference Resolution - Resolves relative and nested pointers within specifications to support modular API definitions.
  • Operation Metadata - Retrieves operation-specific metadata, such as operation IDs and input schemas, during request processing.
  • API Mocking - Enables API simulation via a CLI to test functionality without implementing a full backend.
  • API Documentation Viewers - Provides interfaces for displaying and exploring API specifications interactively.
  • API Documentation Hosting - Serves interactive, browsable API specifications and documentation interfaces directly from the server.
  • API Mocking Servers - Ships a mock server that simulates API responses based on the provided OpenAPI specification.
  • Pluggable Body Validators - Provides pluggable validation logic for request and response bodies based on specific media types.
  • Interactive API Documentation UIs - Renders API specifications into interactive HTML for browsing and testing endpoints.
  • Middleware Server Integrations - Can be wrapped around existing web applications to add specification-driven routing and validation.
  • Request Middleware - Allows the integration of custom middleware classes to intercept and modify HTTP requests and responses.
  • API Frameworks - OpenAPI-first framework for Python with automatic validation.
  • Language Toolkits - OpenAPI framework for Python with automatic validation.
  • Web Frameworks - Swagger/OpenAPI First framework for Python with automatic endpoint validation.

Star history

Star history chart for zalando/connexionStar history chart for zalando/connexion

How this analysis was created: This summary and feature list are AI-generated from collected project material and can contain mistakes. Stars, license and language are imported from GitHub. Inclusion does not mean that we have tested or audited this project. Check the source documentation for any feature you depend on. Learn more on our About page.

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Projects sharing features with Connexion

These projects share indexed features with Connexion. Shared tags can include platform or build tooling; verify the primary use case before treating a result as a replacement.
  • spec-first/connexionspec-first avatar

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    Connexion is a spec-first Python web framework designed to derive server behavior and validation logic directly from a predefined API contract. It enables the development of web services by using an OpenAPI specification to automatically handle routing, request validation, and response serialization. The framework distinguishes itself by acting as an OpenAPI request validator and mock server. It can simulate API behavior by serving example responses based on specification schemas, allowing for frontend development and prototyping before a backend implementation is completed. Additionally, it

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  • flasgger/flasggerflasgger avatar

    flasgger/flasgger

    3,740View on GitHub↗

    Flasgger is a documentation framework for Flask applications that generates OpenAPI specifications and an integrated Swagger UI. It functions as a documentation generator and specification parser that extracts API schemas from route definitions, function docstrings, and external specification files. The tool allows API definitions to be maintained either within the source code using YAML blocks in docstrings or decoupled into standalone YAML files. It provides a browser-based interactive console for testing and exploring API endpoints directly from the web application. Beyond documentation,

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  • cerbos/cerboscerbos avatar

    cerbos/cerbos

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    Cerbos is an open-source authorization service that provides a centralized, language-agnostic engine for managing access control. It functions as a policy-as-code platform, allowing teams to define, test, and distribute authorization rules using declarative YAML or JSON configurations. By decoupling access logic from application code, it enables consistent permission enforcement across diverse service stacks. The project distinguishes itself through its ability to translate high-level authorization policies into native database query filters. This capability allows applications to enforce sec

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  • mulesoft/api-consolemulesoft avatar

    mulesoft/api-console

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    This project is a web-based documentation viewer and interactive console designed to render API specifications into browser-based interfaces. It provides a framework for exploring endpoints, managing authorization flows, and executing live test requests directly against defined services. By parsing specification files into structured data models, the tool generates dynamic interfaces that allow developers to interact with API definitions in real time. The console is built as a library of reusable web components, enabling developers to embed documentation viewers into existing web applications

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Frequently asked questions

What does zalando/connexion do?

Connexion is a specification-driven framework for building APIs that automatically maps OpenAPI specifications to application logic. It uses these specifications to automate routing, request validation, and response serialization, linking API operations to backend handler functions via operation IDs.

What are the main features of zalando/connexion?

The main features of zalando/connexion are: Automatic Route Registration, Specification-Driven Registrations, API Payload Serializers, Request Validation, Request Contexts, API Route Prefixes, API Access Security, API Authentication.

Which projects share features with zalando/connexion?

Projects with overlapping indexed features include: spec-first/connexion — Connexion is a spec-first Python web framework designed to derive server behavior and validation logic directly from a… flasgger/flasgger — Flasgger is a documentation framework for Flask applications that generates OpenAPI specifications and an integrated… cerbos/cerbos — Cerbos is an open-source authorization service that provides a centralized, language-agnostic engine for managing… mulesoft/api-console — This project is a web-based documentation viewer and interactive console designed to render API specifications into… nodeshift/nodejs-reference-architecture — This project provides a comprehensive architectural framework and set of standardized patterns for building, securing,… typestack/routing-controllers — routing-controllers is a declarative API router and web framework controller for TypeScript. It provides a system for…