server

Documentation

Overview

Package server contains the policy engine's server handlers.

Index

• Constants
• type AuthenticationScheme
• type AuthorizationScheme
• type Buffer
  • func NewBoundedBuffer(n int) Buffer
• type Info
• type Server
  • func New() *Server
  • func (s *Server) Compiler() *ast.Compiler
  • func (s *Server) Init(ctx context.Context) (*Server, error)
  • func (s *Server) Listeners() (func() error, func() error)
  • func (s *Server) WithAddress(addr string) *Server
  • func (s *Server) WithAuthentication(scheme AuthenticationScheme) *Server
  • func (s *Server) WithAuthorization(scheme AuthorizationScheme) *Server
  • func (s *Server) WithCertificate(cert *tls.Certificate) *Server
  • func (s *Server) WithCompilerErrorLimit(limit int) *Server
  • func (s *Server) WithDiagnosticsBuffer(buf Buffer) *Server
  • func (s *Server) WithInsecureAddress(addr string) *Server
  • func (s *Server) WithStore(store storage.Store) *Server

Constants

const DefaultDiagnosticsBufferSize = 10

DefaultDiagnosticsBufferSize is the default size of the server's diagnostic buffer.

Types

type AuthenticationScheme

type AuthenticationScheme int

AuthenticationScheme enumerates the supported authentication schemes. The authentication scheme determines how client identities are established.

const (
	AuthenticationOff   AuthenticationScheme = iota
	AuthenticationToken                      = iota
)

Set of supported authentication schemes.

type AuthorizationScheme

type AuthorizationScheme int

AuthorizationScheme enumerates the supported authorization schemes. The authorization scheme determines how access to OPA is controlled.

const (
	AuthorizationOff   AuthorizationScheme = iota
	AuthorizationBasic                     = iota
)

Set of supported authorization schemes.

type Buffer

type Buffer interface {
	// Push adds the given Info into the buffer.
	Push(*Info)

	// Iter iterates over the buffer, from oldest present Info to newest. It should
	// call fn on each Info.
	Iter(fn func(*Info))
}

Buffer defines the interface for types that can be used as the diagnostic buffer within the OPA server. Buffers must be be able to handle concurrent calls.

func NewBoundedBuffer

func NewBoundedBuffer(n int) Buffer

NewBoundedBuffer creates a new Buffer with maximum size n. NewBoundedBuffer will panic if n is not positive.

type Info

type Info struct {
	Query     string
	Timestamp time.Time

	Input   interface{}
	Results *interface{}
	Error   error

	Metrics metrics.Metrics
	Trace   []*topdown.Event
}

Info stores diagnostic information about the evaluation of a query.

type Server

type Server struct {
	Handler http.Handler
	// contains filtered or unexported fields
}

Server represents an instance of OPA running in server mode.

func New

func New() *Server

New returns a new Server.

func (*Server) Compiler

func (s *Server) Compiler() *ast.Compiler

Compiler returns the server's compiler.

The server's compiler contains the compiled versions of all modules added to the server as well as data structures for performing query analysis. This is intended to allow services to embed the OPA server while still relying on the topdown package for query evaluation.

func (*Server) Init

func (s *Server) Init(ctx context.Context) (*Server, error)

Init initializes the server. This function MUST be called before Loop.

func (*Server) Listeners

func (s *Server) Listeners() (func() error, func() error)

Listeners returns functions that listen and serve connections.

func (*Server) WithAddress

func (s *Server) WithAddress(addr string) *Server

WithAddress sets the listening address that the server will bind to.

func (*Server) WithAuthentication

func (s *Server) WithAuthentication(scheme AuthenticationScheme) *Server

WithAuthentication sets authentication scheme to use on the server.

func (*Server) WithAuthorization

func (s *Server) WithAuthorization(scheme AuthorizationScheme) *Server

WithAuthorization sets authorization scheme to use on the server.

func (*Server) WithCertificate

func (s *Server) WithCertificate(cert *tls.Certificate) *Server

WithCertificate sets the server-side certificate that the server will use.

func (*Server) WithCompilerErrorLimit

func (s *Server) WithCompilerErrorLimit(limit int) *Server

WithCompilerErrorLimit sets the limit on the number of compiler errors the server will allow.

func (*Server) WithDiagnosticsBuffer

func (s *Server) WithDiagnosticsBuffer(buf Buffer) *Server

WithDiagnosticsBuffer sets the diagnostics buffer stored by the server.

func (*Server) WithInsecureAddress

func (s *Server) WithInsecureAddress(addr string) *Server

WithInsecureAddress sets the listening address that the server will bind to.

func (*Server) WithStore

func (s *Server) WithStore(store storage.Store) *Server

WithStore sets the storage used by the server.