jsonclient

Documentation

Index

• type JSONClient
  • func New(uri string, hc *http.Client, opts Options) (*JSONClient, error)
  • func (c *JSONClient) GetAndParse(ctx context.Context, path string, params map[string]string, rsp interface{}) (*http.Response, []byte, error)
  • func (c *JSONClient) PostAndParse(ctx context.Context, path string, req, rsp interface{}) (*http.Response, []byte, error)
  • func (c *JSONClient) PostAndParseWithRetry(ctx context.Context, path string, req, rsp interface{}) (*http.Response, []byte, error)
• type Logger
• type Options
  • func (opts *Options) ParsePublicKey() (crypto.PublicKey, error)

Types

type JSONClient

type JSONClient struct {
	Verifier *ct.SignatureVerifier // nil for no verification (e.g. no public key available)
	// contains filtered or unexported fields
}

JSONClient provides common functionality for interacting with a JSON server that uses cryptographic signatures.

func New

func New(uri string, hc *http.Client, opts Options) (*JSONClient, error)

New constructs a new JSONClient instance, for the given base URI, using the given http.Client object (if provided) and the Options object. If opts does not specify a public key, signatures will not be verified.

func (*JSONClient) GetAndParse

func (c *JSONClient) GetAndParse(ctx context.Context, path string, params map[string]string, rsp interface{}) (*http.Response, []byte, error)

GetAndParse makes a HTTP GET call to the given path, and attempta to parse the response as a JSON representation of the rsp structure. Returns the http.Response, the body of the response, and an error. Note that the returned http.Response can be non-nil even when an error is returned, in particular when the HTTP status is not OK or when the JSON parsing fails.

func (*JSONClient) PostAndParse

func (c *JSONClient) PostAndParse(ctx context.Context, path string, req, rsp interface{}) (*http.Response, []byte, error)

PostAndParse makes a HTTP POST call to the given path, including the request parameters, and attempts to parse the response as a JSON representation of the rsp structure. Returns the http.Response, the body of the response, and an error. Note that the returned http.Response can be non-nil even when an error is returned, in particular when the HTTP status is not OK or when the JSON parsing fails.

func (*JSONClient) PostAndParseWithRetry

func (c *JSONClient) PostAndParseWithRetry(ctx context.Context, path string, req, rsp interface{}) (*http.Response, []byte, error)

PostAndParseWithRetry makes a HTTP POST call, but retries (with backoff) on retriable errors; the caller should set a deadline on the provided context to prevent infinite retries. Return values are as for PostAndParse.

type Logger

type Logger interface {
	// Printf formats and logs a message
	Printf(string, ...interface{})
}

Logger is a simple logging interface used to log internal errors and warnings

type Options

type Options struct {
	// Interface to use for logging warnings and errors, if nil the
	// standard library log package will be used.
	Logger Logger
	// PEM format public key to use for signature verification.
	PublicKey string
	// DER format public key to use for signature verification.
	PublicKeyDER []byte
}

Options are the options for creating a new JSONClient.

func (*Options) ParsePublicKey

func (opts *Options) ParsePublicKey() (crypto.PublicKey, error)

ParsePublicKey parses and returns the public key contained in opts. If both opts.PublicKey and opts.PublicKeyDER are set, PublicKeyDER is used. If neither is set, nil will be returned.