HttpEndpoint

Used for creating HTTP endpoints.

Implements: IConfigurable, IReferenceable, IOpenable

Description

The HttpEndpoint class allows you to create HTTP endpoints.

Important points

  • An endpoint is a URL, at which a given service can be accessed by a client.

Configuration parameters

Parameters to pass to the configure method for component configuration:

  • connection(s): the connection resolver’s connections:
    • “connection.discovery_key”: key to use for connection resolving in a discovery service;
    • “connection.protocol”: connection’s protocol;
    • “connection.host”: target host;
    • “connection.port”: target port;
    • “connection.uri”: target URI.
  • credential: the HTTPS credentials:
    • “credential.ssl_key_file”: SSL private key in PEM
    • “credential.ssl_crt_file”: SSL certificate in PEM
    • “credential.ssl_ca_file”: certificate authorities (root cerfiticates) in PEM

References

A logger, counters, and a connection resolver can be referenced by passing the following references to the object’s set_references method:

  • *:logger:*:*:1.0 - (optional) ILogger components to pass log messages
  • *:counters:*:*:1.0 - (optional) ICounters components to pass collected measurements
  • *:discovery:*:*:1.0 - (optional) IDiscovery services to resolve connections

Instance methods

close

Closes this endpoint and the REST server (service) that was opened earlier.

public close(correlationId: string): Promise<void>

  • correlationId: string - (optional) transaction id used to trace execution through the call chain.

configure

Configures this HttpEndpoint using the given configuration parameters.

public configure(config: ConfigParams): void

  • config: ConfigParams - configuration parameters, containing a “connection(s)” section.

getCorrelationId

Returns correlationId from request

public getCorrelationId(): string

  • returns: string - http response to the request.

isOpen

Checks if the component is open.

public isOpen(): boolean

  • returns: boolean - whether or not this endpoint is open with an actively listening REST server.

register

Registers a registerable object for dynamic endpoint discovery.

public register(registration: IRegisterable): void

registerInterceptor

Registers a middleware action for the given route.

public registerInterceptor(route: string, action: (req: any, res: any, next: () => void) => void): void

  • route: string - route to register in this object’s REST server (service).
  • action: (req: any, res: any, next: () => void) => void - middleware action to perform at the given route.

registerRoute

Registers an action in this objects REST server (service) by the given method and route.

public registerRoute(method: string, route: string, schema: Schema, action: (req: any, res: any) => void): void

  • method: string - HTTP method of the route.
  • route: string - route to register in this object’s REST server (service).
  • schema: Schema - schema to use for parameter validation.
  • action: (req: any, res: any) => void - action to perform at the given route.

registerRouteWithAuth

Registers an action with authorization in this objects REST server (service) by the given method and route.

public registerRouteWithAuth(method: string, route: string, schema: Schema, authorize: (req: any, res: any, next: () => void) => void, action: (req: any, res: any) => void): void

  • method: string - HTTP method of the route.
  • route: string - route to register in this object’s REST server (service).
  • schema: Schema - schema to use for parameter validation.
  • authorize: (req: any, res: any, next: () => void) => void - authorization interceptor
  • action: (req: any, res: any) => void - action to perform at the given route.

setReferences

Sets references to this endpoint’s logger, counters, and connection resolver.

public setReferences(references: IReferences): void

  • references: IReferences - IReferences object, containing references to a logger, counters, and a connection resolver.

unregister

Unregisters a registerable object, so that it is no longer used in dynamic endpoint discovery.

public unregister(registration: IReferences): void

Examples

public MyMethod(_config: ConfigParams, _references: IReferences) {
    let endpoint = new HttpEndpoint();
    if (this._config)
        endpoint.configure(this._config);
    if (this._references)
        endpoint.setReferences(this._references);
    ...
    await this._endpoint.open(correlationId);
    this._opened = true;
    ...
}

See also