restclient

package
v0.0.0-...-b71b41b Latest Latest
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 Go to latest Published: May 6, 2016 License: Apache-2.0, Apache-2.0 Imports: 34 Imported by: 0

Documentation

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func DefaultKubernetesUserAgent 

func DefaultKubernetesUserAgent() string

DefaultKubernetesUserAgent returns the default user agent that clients can use.

func DefaultServerURL 

func DefaultServerURL(host, apiPath string, groupVersion unversioned.GroupVersion, defaultTLS bool) (*url.URL, string, error)

DefaultServerURL converts a host, host:port, or URL string to the default base server API path to use with a Client at a given API version following the standard conventions for a Kubernetes API.

func HTTPWrappersForConfig 

func HTTPWrappersForConfig(config *Config, rt http.RoundTripper) (http.RoundTripper, error)

HTTPWrappersForConfig wraps a round tripper with any relevant layered behavior from the config. Exposed to allow more clients that need HTTP-like behavior but then must hijack the underlying connection (like WebSocket or HTTP2 clients). Pure HTTP clients should use the higher level TransportFor or RESTClientFor methods.

func IsConfigTransportTLS 

func IsConfigTransportTLS(config Config) bool

IsConfigTransportTLS returns true if and only if the provided config will result in a protected connection to the server when it is passed to restclient.RESTClientFor(). Use to determine when to send credentials over the wire.

Note: the Insecure flag is ignored when testing for this value, so MITM attacks are still possible.

func LoadTLSFiles 

func LoadTLSFiles(c *Config) error

LoadTLSFiles copies the data from the CertFile, KeyFile, and CAFile fields into the CertData, KeyData, and CAFile fields, or returns an error. If no error is returned, all three fields are either populated or were empty to start.

func ServerAPIVersions 

func ServerAPIVersions(c *Config) (groupVersions []string, err error)

ServerAPIVersions returns the GroupVersions supported by the API server. It creates a RESTClient based on the passed in config, but it doesn't rely on the Version and Codec of the config, because it uses AbsPath and takes the raw response.

func SetKubernetesDefaults 

func SetKubernetesDefaults(config *Config) error

SetKubernetesDefaults sets default values on the provided client config for accessing the Kubernetes API or returns an error if any of the defaults are impossible or invalid.

func TLSConfigFor 

func TLSConfigFor(config *Config) (*tls.Config, error)

TLSConfigFor returns a tls.Config that will provide the transport level security defined by the provided Config. Will return nil if no transport level security is requested.

func TransportFor 

func TransportFor(config *Config) (http.RoundTripper, error)

TransportFor returns an http.RoundTripper that will provide the authentication or transport level security defined by the provided Config. Will return the default http.DefaultTransport if no special case behavior is needed.

Types

type BackoffManager 

type BackoffManager interface {
	UpdateBackoff(actualUrl *url.URL, err error, responseCode int)
	CalculateBackoff(actualUrl *url.URL) time.Duration
	Sleep(d time.Duration)
}

type Config 

type Config struct {
	// Host must be a host string, a host:port pair, or a URL to the base of the apiserver.
	// If a URL is given then the (optional) Path of that URL represents a prefix that must
	// be appended to all request URIs used to access the apiserver. This allows a frontend
	// proxy to easily relocate all of the apiserver endpoints.
	Host string
	// APIPath is a sub-path that points to an API root.
	APIPath string
	// Prefix is the sub path of the server. If not specified, the client will set
	// a default value.  Use "/" to indicate the server root should be used
	Prefix string

	// ContentConfig contains settings that affect how objects are transformed when
	// sent to the server.
	ContentConfig

	// Server requires Basic authentication
	Username string
	Password string

	// Server requires Bearer authentication. This client will not attempt to use
	// refresh tokens for an OAuth2 flow.
	// TODO: demonstrate an OAuth2 compatible client.
	BearerToken string

	// TLSClientConfig contains settings to enable transport layer security
	TLSClientConfig

	// Server should be accessed without verifying the TLS
	// certificate. For testing only.
	Insecure bool

	// UserAgent is an optional field that specifies the caller of this request.
	UserAgent string

	// Transport may be used for custom HTTP behavior. This attribute may not
	// be specified with the TLS client certificate options. Use WrapTransport
	// for most client level operations.
	Transport http.RoundTripper
	// WrapTransport will be invoked for custom HTTP behavior after the underlying
	// transport is initialized (either the transport created from TLSClientConfig,
	// Transport, or http.DefaultTransport). The config may layer other RoundTrippers
	// on top of the returned RoundTripper.
	WrapTransport func(rt http.RoundTripper) http.RoundTripper

	// QPS indicates the maximum QPS to the master from this client.  If zero, QPS is unlimited.
	QPS float32

	// Maximum burst for throttle
	Burst int
}

Config holds the common attributes that can be passed to a Kubernetes client on initialization.

func AddUserAgent 

func AddUserAgent(config *Config, userAgent string) *Config

func InClusterConfig 

func InClusterConfig() (*Config, error)

InClusterConfig returns a config object which uses the service account kubernetes gives to pods. It's intended for clients that expect to be running inside a pod running on kuberenetes. It will return an error if called from a process not running in a kubernetes environment.

type ContentConfig 

type ContentConfig struct {
	// ContentType specifies the wire format used to communicate with the server.
	// This value will be set as the Accept header on requests made to the server, and
	// as the default content type on any object sent to the server. If not set,
	// "application/json" is used.
	ContentType string
	// GroupVersion is the API version to talk to. Must be provided when initializing
	// a RESTClient directly. When initializing a Client, will be set with the default
	// code version.
	GroupVersion *unversioned.GroupVersion
	// Codec specifies the encoding and decoding behavior for runtime.Objects passed
	// to a RESTClient or Client. Required when initializing a RESTClient, optional
	// when initializing a Client.
	Codec runtime.Codec
}

type HTTPClient 

type HTTPClient interface {
	Do(req *http.Request) (*http.Response, error)
}

HTTPClient is an interface for testing a request object.

type NoBackoff 

type NoBackoff struct {
}

NoBackoff is a stub implementation, can be used for mocking or else as a default.

func (*NoBackoff) CalculateBackoff 

func (n *NoBackoff) CalculateBackoff(actualUrl *url.URL) time.Duration

func (*NoBackoff) Sleep 

func (n *NoBackoff) Sleep(d time.Duration)

func (*NoBackoff) UpdateBackoff 

func (n *NoBackoff) UpdateBackoff(actualUrl *url.URL, err error, responseCode int)

type RESTClient 

type RESTClient struct {

	// TODO extract this into a wrapper interface via the RESTClient interface in kubectl.
	Throttle util.RateLimiter

	// Set specific behavior of the client.  If not set http.DefaultClient will be used.
	Client *http.Client
	// contains filtered or unexported fields
}

RESTClient imposes common Kubernetes API conventions on a set of resource paths. The baseURL is expected to point to an HTTP or HTTPS path that is the parent of one or more resources. The server should return a decodable API resource object, or an api.Status object which contains information about the reason for any failure.

Most consumers should use client.New() to get a Kubernetes API client.

func NewRESTClient 

func NewRESTClient(baseURL *url.URL, versionedAPIPath string, config ContentConfig, maxQPS float32, maxBurst int, client *http.Client) *RESTClient

NewRESTClient creates a new RESTClient. This client performs generic REST functions such as Get, Put, Post, and Delete on specified paths. Codec controls encoding and decoding of responses from the server.

func RESTClientFor 

func RESTClientFor(config *Config) (*RESTClient, error)

RESTClientFor returns a RESTClient that satisfies the requested attributes on a client Config object. Note that a RESTClient may require fields that are optional when initializing a Client. A RESTClient created by this method is generic - it expects to operate on an API that follows the Kubernetes conventions, but may not be the Kubernetes API.

func UnversionedRESTClientFor 

func UnversionedRESTClientFor(config *Config) (*RESTClient, error)

UnversionedRESTClientFor is the same as RESTClientFor, except that it allows the config.Version to be empty.

func (*RESTClient) APIVersion 

func (c *RESTClient) APIVersion() unversioned.GroupVersion

APIVersion returns the APIVersion this RESTClient is expected to use.

func (*RESTClient) Delete 

func (c *RESTClient) Delete() *Request

Delete begins a DELETE request. Short for c.Verb("DELETE").

func (*RESTClient) Get 

func (c *RESTClient) Get() *Request

Get begins a GET request. Short for c.Verb("GET").

func (*RESTClient) Patch 

func (c *RESTClient) Patch(pt api.PatchType) *Request

Patch begins a PATCH request. Short for c.Verb("Patch").

func (*RESTClient) Post 

func (c *RESTClient) Post() *Request

Post begins a POST request. Short for c.Verb("POST").

func (*RESTClient) Put 

func (c *RESTClient) Put() *Request

Put begins a PUT request. Short for c.Verb("PUT").

func (*RESTClient) Verb 

func (c *RESTClient) Verb(verb string) *Request

Verb begins a request with a verb (GET, POST, PUT, DELETE).

Example usage of RESTClient's request building interface: c := NewRESTClient(url, codec) resp, err := c.Verb("GET"). 

Path("pods").
SelectorParam("labels", "area=staging").
Timeout(10*time.Second).
Do()

if err != nil { ... } list, ok := resp.(*api.PodList)

type Request 

type Request struct {
	// contains filtered or unexported fields
}

Request allows for building up a request to a server in a chained fashion. Any errors are stored until the end of your call, so you only have to check once.

func NewRequest 

func NewRequest(client HTTPClient, verb string, baseURL *url.URL, versionedAPIPath string, content ContentConfig, backoff BackoffManager, throttle util.RateLimiter) *Request

NewRequest creates a new request helper object for accessing runtime.Objects on a server.

func (*Request) AbsPath 

func (r *Request) AbsPath(segments ...string) *Request

AbsPath overwrites an existing path with the segments provided. Trailing slashes are preserved when a single segment is passed.

func (*Request) Body 

func (r *Request) Body(obj interface{}) *Request

Body makes the request use obj as the body. Optional. If obj is a string, try to read a file of that name. If obj is a []byte, send it directly. If obj is an io.Reader, use it directly. If obj is a runtime.Object, marshal it correctly, and set Content-Type header. If obj is a runtime.Object and nil, do nothing. Otherwise, set an error.

func (*Request) Do 

func (r *Request) Do() Result

Do formats and executes the request. Returns a Result object for easy response processing.

Error type:

  • If the request can't be constructed, or an error happened earlier while building its arguments: *RequestConstructionError
  • If the server responds with a status: *errors.StatusError or *errors.UnexpectedObjectError
  • http.Client.Do errors are returned directly.

func (*Request) DoRaw 

func (r *Request) DoRaw() ([]byte, error)

DoRaw executes the request but does not process the response body.

func (*Request) FieldsSelectorParam 

func (r *Request) FieldsSelectorParam(s fields.Selector) *Request

FieldsSelectorParam adds the given selector as a query parameter with the name paramName.

func (*Request) LabelsSelectorParam 

func (r *Request) LabelsSelectorParam(s labels.Selector) *Request

LabelsSelectorParam adds the given selector as a query parameter

func (*Request) Name 

func (r *Request) Name(resourceName string) *Request

Name sets the name of a resource to access (<resource>/[ns/<namespace>/]<name>)

func (*Request) Namespace 

func (r *Request) Namespace(namespace string) *Request

Namespace applies the namespace scope to a request (<resource>/[ns/<namespace>/]<name>)

func (*Request) NamespaceIfScoped 

func (r *Request) NamespaceIfScoped(namespace string, scoped bool) *Request

NamespaceIfScoped is a convenience function to set a namespace if scoped is true

func (*Request) Param 

func (r *Request) Param(paramName, s string) *Request

Param creates a query parameter with the given string value.

func (*Request) Prefix 

func (r *Request) Prefix(segments ...string) *Request

Prefix adds segments to the relative beginning to the request path. These items will be placed before the optional Namespace, Resource, or Name sections. Setting AbsPath will clear any previously set Prefix segments

func (*Request) RequestURI 

func (r *Request) RequestURI(uri string) *Request

RequestURI overwrites existing path and parameters with the value of the provided server relative URI. Some parameters (those in specialParameters) cannot be overwritten.

func (*Request) Resource 

func (r *Request) Resource(resource string) *Request

Resource sets the resource to access (<resource>/[ns/<namespace>/]<name>)

func (*Request) SetHeader 

func (r *Request) SetHeader(key, value string) *Request

func (*Request) Stream 

func (r *Request) Stream() (io.ReadCloser, error)

Stream formats and executes the request, and offers streaming of the response. Returns io.ReadCloser which could be used for streaming of the response, or an error Any non-2xx http status code causes an error. If we get a non-2xx code, we try to convert the body into an APIStatus object. If we can, we return that as an error. Otherwise, we create an error that lists the http status and the content of the response.

func (*Request) SubResource 

func (r *Request) SubResource(subresources ...string) *Request

SubResource sets a sub-resource path which can be multiple segments segment after the resource name but before the suffix.

func (*Request) Suffix 

func (r *Request) Suffix(segments ...string) *Request

Suffix appends segments to the end of the path. These items will be placed after the prefix and optional Namespace, Resource, or Name sections.

func (*Request) Timeout 

func (r *Request) Timeout(d time.Duration) *Request

Timeout makes the request use the given duration as a timeout. Sets the "timeout" parameter.

func (*Request) URL 

func (r *Request) URL() *url.URL

URL returns the current working URL.

func (*Request) UintParam 

func (r *Request) UintParam(paramName string, u uint64) *Request

UintParam creates a query parameter with the given value.

func (*Request) VersionedParams 

func (r *Request) VersionedParams(obj runtime.Object, codec runtime.ParameterCodec) *Request

VersionedParams will take the provided object, serialize it to a map[string][]string using the implicit RESTClient API version and the default parameter codec, and then add those as parameters to the request. Use this to provide versioned query parameters from client libraries.

func (*Request) Watch 

func (r *Request) Watch() (watch.Interface, error)

Watch attempts to begin watching the requested location. Returns a watch.Interface, or an error.

type RequestConstructionError 

type RequestConstructionError struct {
	Err error
}

RequestConstructionError is returned when there's an error assembling a request.

func (*RequestConstructionError) Error 

func (r *RequestConstructionError) Error() string

Error returns a textual description of 'r'.

type ResponseWrapper 

type ResponseWrapper interface {
	DoRaw() ([]byte, error)
	Stream() (io.ReadCloser, error)
}

ResponseWrapper is an interface for getting a response. The response may be either accessed as a raw data (the whole output is put into memory) or as a stream.

type Result 

type Result struct {
	// contains filtered or unexported fields
}

Result contains the result of calling Request.Do().

func (Result) Error 

func (r Result) Error() error

Error returns the error executing the request, nil if no error occurred. See the Request.Do() comment for what errors you might get.

func (Result) Get 

func (r Result) Get() (runtime.Object, error)

Get returns the result as an object.

func (Result) Into 

func (r Result) Into(obj runtime.Object) error

Into stores the result into obj, if possible. If obj is nil it is ignored.

func (Result) Raw 

func (r Result) Raw() ([]byte, error)

Raw returns the raw result.

func (Result) StatusCode 

func (r Result) StatusCode(statusCode *int) Result

StatusCode returns the HTTP status code of the request. (Only valid if no error was returned.)

func (Result) WasCreated 

func (r Result) WasCreated(wasCreated *bool) Result

WasCreated updates the provided bool pointer to whether the server returned 201 created or a different response.

type TLSClientConfig 

type TLSClientConfig struct {
	// Server requires TLS client certificate authentication
	CertFile string
	// Server requires TLS client certificate authentication
	KeyFile string
	// Trusted root certificates for server
	CAFile string

	// CertData holds PEM-encoded bytes (typically read from a client certificate file).
	// CertData takes precedence over CertFile
	CertData []byte
	// KeyData holds PEM-encoded bytes (typically read from a client certificate key file).
	// KeyData takes precedence over KeyFile
	KeyData []byte
	// CAData holds PEM-encoded bytes (typically read from a root certificates bundle).
	// CAData takes precedence over CAFile
	CAData []byte
}

TLSClientConfig contains settings to enable transport layer security

type URLBackoff 

type URLBackoff struct {
	// Uses backoff as underlying implementation.
	Backoff *util.Backoff
}

URLBackoff struct implements the semantics on top of Backoff which we need for URL specific exponential backoff.

func (*URLBackoff) CalculateBackoff 

func (b *URLBackoff) CalculateBackoff(actualUrl *url.URL) time.Duration

CalculateBackoff takes a url and back's off exponentially, based on its knowledge of existing failures.

func (*URLBackoff) Disable 

func (b *URLBackoff) Disable()

Disable makes the backoff trivial, i.e., sets it to zero. This might be used by tests which want to run 1000s of mock requests without slowing down.

func (*URLBackoff) Sleep 

func (b *URLBackoff) Sleep(d time.Duration)

func (*URLBackoff) UpdateBackoff 

func (b *URLBackoff) UpdateBackoff(actualUrl *url.URL, err error, responseCode int)

UpdateBackoff updates backoff metadata

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