http

Documentation

Overview

Package http provides the HTTP server for accessing the distributed database. It also provides the endpoint for other nodes to join an existing cluster.

Index

• Constants
• func NormalizeAddr(addr string) string
• type CredentialStore
• type Response
  • func NewResponse() *Response
  • func (r *Response) SetTime()
• type Service
  • func New(addr string, store Store, credentials CredentialStore) *Service
  • func (s *Service) Addr() net.Addr
  • func (s *Service) CheckRequestPerm(r *http.Request, perm string) bool
  • func (s *Service) Close()
  • func (s *Service) FormRedirect(r *http.Request, host string) string
  • func (s *Service) RegisterStatus(key string, stat Statuser) error
  • func (s *Service) ServeHTTP(w http.ResponseWriter, r *http.Request)
  • func (s *Service) Start() error
• type Statuser
• type Store

Constants

const (

	// PermAll means all actions permitted.
	PermAll = "all"
	// PermJoin means user is permitted to join cluster.
	PermJoin = "join"
	// PermRemove means user is permitted to remove a node.
	PermRemove = "remove"
	// PermExecute means user can access execute endpoint.
	PermExecute = "execute"
	// PermQuery means user can access query endpoint
	PermQuery = "query"
	// PermStatus means user can retrieve node status.
	PermStatus = "status"
	// PermBackup means user can backup node.
	PermBackup = "backup"
	// PermLoad means user can load a SQLite dump into a node.
	PermLoad = "load"

	// VersionHTTPHeader is the HTTP header key for the version.
	VersionHTTPHeader = "X-RQLITE-VERSION"
)

Functions

func NormalizeAddr

func NormalizeAddr(addr string) string

NormalizeAddr ensures that the given URL has a HTTP protocol prefix. If none is supplied, it prefixes the URL with "http://".

Types

type CredentialStore

type CredentialStore interface {
	// Check returns whether username and password are a valid combination.
	Check(username, password string) bool

	// HasPerm returns whether username has the given perm.
	HasPerm(username string, perm string) bool
}

CredentialStore is the interface credential stores must support.

type Response

type Response struct {
	Results interface{} `json:"results,omitempty"`
	Error   string      `json:"error,omitempty"`
	Time    float64     `json:"time,omitempty"`
	// contains filtered or unexported fields
}

Response represents a response from the HTTP service.

func NewResponse

func NewResponse() *Response

NewResponse returns a new instance of response.

func (*Response) SetTime

func (r *Response) SetTime()

SetTime sets the Time attribute of the response. This way it will be present in the serialized JSON version.

type Service

type Service struct {
	CertFile string // Path to SSL certificate.
	KeyFile  string // Path to SSL private key.

	Expvar bool
	Pprof  bool

	BuildInfo map[string]interface{}
	// contains filtered or unexported fields
}

Service provides HTTP service.

func New

func New(addr string, store Store, credentials CredentialStore) *Service

New returns an uninitialized HTTP service. If credentials is nil, then the service performs no authentication and authorization checks.

func (*Service) Addr

func (s *Service) Addr() net.Addr

Addr returns the address on which the Service is listening

func (*Service) CheckRequestPerm

func (s *Service) CheckRequestPerm(r *http.Request, perm string) bool

CheckRequestPerm returns true if authentication is enabled and the user contained in the BasicAuth request has either PermAll, or the given perm.

func (*Service) Close

func (s *Service) Close()

Close closes the service.

func (*Service) FormRedirect

func (s *Service) FormRedirect(r *http.Request, host string) string

FormRedirect returns the value for the "Location" header for a 301 response.

func (*Service) RegisterStatus

func (s *Service) RegisterStatus(key string, stat Statuser) error

RegisterStatus allows other modules to register status for serving over HTTP.

func (*Service) ServeHTTP

func (s *Service) ServeHTTP(w http.ResponseWriter, r *http.Request)

ServeHTTP allows Service to serve HTTP requests.

func (*Service) Start

func (s *Service) Start() error

Start starts the service.

type Statuser

type Statuser interface {
	Stats() (interface{}, error)
}

Statuser is the interface status providers must implement.

type Store

type Store interface {
	// Execute executes a slice of queries, each of which is not expected
	// to return rows. If timings is true, then timing information will
	// be return. If tx is true, then either all queries will be executed
	// successfully or it will as though none executed.
	Execute(queries []string, timings, tx bool) ([]*sql.Result, error)

	// Query executes a slice of queries, each of which returns rows. If
	// timings is true, then timing information will be returned. If tx
	// is true, then all queries will take place while a read transaction
	// is held on the database.
	Query(queries []string, timings, tx bool, lvl store.ConsistencyLevel) ([]*sql.Rows, error)

	// Join joins the node, reachable at addr, to this node.
	Join(addr string) error

	// Remove removes the node, specified by addr, from the cluster.
	Remove(addr string) error

	// Leader returns the Raft leader of the cluster.
	Leader() string

	// Peer returns the API peer for the given address
	Peer(addr string) string

	// Stats returns stats on the Store.
	Stats() (map[string]interface{}, error)

	// Backup returns a byte slice representing a backup of the node state.
	Backup(leader bool) ([]byte, error)
}

Store is the interface the Raft-based database must implement.