webhook

Documentation

Index

• Constants
• func Metrics() []xmetrics.Metric
• type Factory
  • func NewFactory(v *viper.Viper) (f *Factory, err error)
  • func (f *Factory) NewRegistryAndHandler(registry xmetrics.Registry) (Registry, http.Handler)
  • func (f *Factory) Prune(items []W) (list []W)
  • func (f *Factory) SetExternalUpdate(fn func([]W))
  • func (f *Factory) SetList(ul UpdatableList)
• type List
• type Registry
  • func NewRegistry(mon *monitor) Registry
  • func (r *Registry) GetRegistry(rw http.ResponseWriter, req *http.Request)
  • func (r *Registry) UpdateRegistry(rw http.ResponseWriter, req *http.Request)
• type Result
• type StartConfig
  • func NewStartFactory(v *viper.Viper) (sc *StartConfig)
  • func (sc *StartConfig) GetCurrentSystemsHooks(rc chan Result)
• type UpdatableList
  • func NewList(initial []W) UpdatableList
• type W
  • func NewW(jsonString []byte, ip string) (w *W, err error)
  • func (w *W) ID() string
• type WebhookMetrics
  • func ApplyMetricsData(registry xmetrics.Registry) (m WebhookMetrics)

Constants

const (
	ListSize                     = "webhook_list_size_value"
	NotificationUnmarshallFailed = "notification_unmarshall_failed_count"
)

const (
	DEFAULT_EXPIRATION_DURATION time.Duration = time.Second * 300
)

const (
	DEFAULT_UNDERTAKER_INTERVAL time.Duration = time.Minute
)

Functions

func Metrics

func Metrics() []xmetrics.Metric

Metrics returns the defined metrics as a list

Types

type Factory

type Factory struct {

	// Tick is an optional function that produces a channel for time ticks.
	// Test code can set this field to something that returns a channel under the control of the test.
	Tick func(time.Duration) <-chan time.Time `json:"-"`

	// UndertakerInterval is how often the undertaker is invoked
	UndertakerInterval time.Duration `json:"undertakerInterval"`

	// internal handler for AWS SNS Server
	AWS.Notifier `json:"-"`

	// StartConfig is the contains the data need to obtain the current system's listeners
	Start *StartConfig `json:"start"`
	// contains filtered or unexported fields
}

Factory is a classic Factory Object for various webhook things.

func NewFactory

func NewFactory(v *viper.Viper) (f *Factory, err error)

NewFactory creates a Factory from a Viper environment. This function always returns a non-nil Factory instance.

This example uses Viper, which I highly recommend. You could just pass an io.Reader too, and use the encoding/json package. In any case, allowing the configuration source to be nil makes a lot of things easier on clients, like creating a test Factory for tests in client code.

func (*Factory) NewRegistryAndHandler

func (f *Factory) NewRegistryAndHandler(registry xmetrics.Registry) (Registry, http.Handler)

NewRegistryAndHandler returns a List instance for accessing webhooks and an HTTP handler which can receive updates from external systems.

func (*Factory) Prune

func (f *Factory) Prune(items []W) (list []W)

func (*Factory) SetExternalUpdate

func (f *Factory) SetExternalUpdate(fn func([]W))

SetExternalUpdate is a specified function that takes an []W argument This function is called when monitor.changes receives a message

func (*Factory) SetList

func (f *Factory) SetList(ul UpdatableList)

type List

type List interface {
	Len() int
	Get(int) *W
}

List is a read-only random access interface to a set of W's We don't necessarily need an implementation of just this interface alone.

type Registry

type Registry struct {
	Changes chan []W
	// contains filtered or unexported fields
}

func NewRegistry

func NewRegistry(mon *monitor) Registry

func (*Registry) GetRegistry

func (r *Registry) GetRegistry(rw http.ResponseWriter, req *http.Request)

get is an api call to return all the registered listeners

func (*Registry) UpdateRegistry

func (r *Registry) UpdateRegistry(rw http.ResponseWriter, req *http.Request)

update is an api call to processes a listenener registration for adding and updating

type Result

type Result struct {
	Hooks []W
	Error error
}

type StartConfig

type StartConfig struct {
	// maximum time allowed to wait for data to be retrieved
	Duration time.Duration `json:"duration"`

	// path to query for current hooks
	ApiPath string `json:"apiPath"`

	AuthHeader string `json:"authHeader"`

	// sat configuration data for requesting token
	Sat struct {
		// url path
		Path string `json:"path"`

		// client id
		Id string `json:"id"`

		// client secret
		Secret string `json:"secret"`

		// client capabilities
		Capabilities string `json:"capabilities"`

		// the obtained sat token
		Token token
	} `json:"sat"`
	// contains filtered or unexported fields
}

func NewStartFactory

func NewStartFactory(v *viper.Viper) (sc *StartConfig)

func (*StartConfig) GetCurrentSystemsHooks

func (sc *StartConfig) GetCurrentSystemsHooks(rc chan Result)

type UpdatableList

type UpdatableList interface {
	List

	// Update performs a bulk update of this webhooks known to this list
	Update([]W)

	// Filter atomically filters the elements of this list
	Filter(func([]W) []W)
}

UpdatableList is mutable list that can be updated en masse

func NewList

func NewList(initial []W) UpdatableList

NewList just creates an UpdatableList. Don't forget: NewList(nil) is valid!

type W

type W struct {
	// Configuration for message delivery
	Config struct {
		// The URL to deliver messages to.
		URL string `json:"url"`

		// The content-type to set the messages to (unless specified by WRP).
		ContentType string `json:"content_type"`

		// The secret to use for the SHA1 HMAC.
		// Optional, set to "" to disable behavior.
		Secret string `json:"secret,omitempty"`

		// The max number of times to retry for webhook
		MaxRetryCount int `json:"max_retry_count,omitempty"`

		// alt_urls is a list of explicit URLs that should be round robin on faliure
		AlternativeURLs []string `json:"alt_urls,omitempty"`
	} `json:"config"`

	// The URL to notify when we cut off a client due to overflow.
	// Optional, set to "" to disable behavior
	FailureURL string `json:"failure_url"`

	// The list of regular expressions to match event type against.
	Events []string `json:"events"`

	// Matcher type contains values to match against the metadata.
	Matcher struct {
		// The list of regular expressions to match device id type against.
		DeviceId []string `json:"device_id"`
	} `json:"matcher,omitempty"`

	// The specified duration for this hook to live
	Duration time.Duration `json:"duration"`

	// The absolute time when this hook is to be disabled
	Until time.Time `json:"until"`

	// The address that performed the registration
	Address string `json:"registered_from_address"`
}

W is the structure that represents the Webhook listener data we share.

(Note to Wes: this follows the golang naming conventions. webhook.Webhook "stutters", and this type is really the central type of this package. Calling it a single letter is the norm. This could also go in the server package, in which case I'd change the name to Webhook, since service.Webhook works better. See https://blog.golang.org/package-names)

func NewW

func NewW(jsonString []byte, ip string) (w *W, err error)

func (*W) ID

func (w *W) ID() string

ID creates the canonical string identifing a WebhookListener

type WebhookMetrics

type WebhookMetrics struct {
	ListSize                     metrics.Gauge
	NotificationUnmarshallFailed metrics.Counter
}

func ApplyMetricsData

func ApplyMetricsData(registry xmetrics.Registry) (m WebhookMetrics)

ApplyMetricsData is used for setting the counter values on the WebhookMetrics when stored and accessing for later use