graph LR
Application_Entry_Point["Application Entry Point"]
Middleware_Pipeline["Middleware Pipeline"]
Authentication_Service["Authentication Service"]
Permission_Access_Control["Permission & Access Control"]
Resource_Loader["Resource Loader"]
Request_Parameter_Processor["Request Parameter Processor"]
Unclassified["Unclassified"]
Application_Entry_Point -- "Initializes and Registers" --> Middleware_Pipeline
Middleware_Pipeline -- "Invokes and Delegates" --> Authentication_Service
Middleware_Pipeline -- "Invokes" --> Permission_Access_Control
Middleware_Pipeline -- "Invokes" --> Resource_Loader
Authentication_Service -- "Provides User Context" --> Permission_Access_Control
Resource_Loader -- "Provides Resource Context" --> Permission_Access_Control
Request_Parameter_Processor -- "Provides Sanitized Data" --> Resource_Loader
An analysis of the project's request handling pipeline reveals a layered architecture built on Express.js middleware. The flow begins at the Application Entry Point, which initializes the server and registers the core Middleware Pipeline. Each incoming request is first processed by the Request Parameter Processor to sanitize and extract URL parameters. Subsequently, the Authentication Service validates the user's identity by decoding JWT tokens. Once authenticated, the Permission & Access Control component checks if the user has the necessary rights to access the requested resource. The Resource Loader then fetches the relevant data, such as forms or submissions, from the database. This structured, sequential processing ensures that security, authorization, and data retrieval are handled consistently before any business logic is executed.
Initializes the Express.js application, establishes the database connection, and configures the primary router. It acts as the central orchestrator for the entire application startup process.
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A central aggregator that organizes and sequences the execution of all cross-cutting middleware. It defines the step-by-step process that each request goes through before reaching its target resource handler.
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Responsible for verifying user identity. It inspects request headers for authentication tokens (e.g., JWT), validates them, and attaches the authenticated user's context to the request object for downstream use.
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Enforces authorization rules. After a user is authenticated, this component checks if they have the necessary permissions to perform the requested action on a specific resource.
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A specialized middleware that fetches core data entities (like forms or submissions) from the database based on request parameters. It pre-loads this data and attaches it to the request object, making it available to subsequent middleware and handlers.
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Parses, sanitizes, and prepares incoming request parameters from the URL and request body. This ensures that data is in a consistent and usable format before being used by other components like the Resource Loader.
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Component for all unclassified files and utility functions (Utility functions/External Libraries/Dependencies)
Related Classes/Methods: None