rest

Documentation

Overview

Package rest provides HTTP types and primitives for REST requests validation and responses handling.

Index

• Constants
• func CheckBadRequestError(w http.ResponseWriter, err error) bool
• func CheckError(w http.ResponseWriter, status int, err error) bool
• func CheckInternalServerError(w http.ResponseWriter, err error) bool
• func CheckNotFoundError(w http.ResponseWriter, err error) bool
• func ParseFloat64OrReturnBadRequest(w http.ResponseWriter, s string, defaultIfEmpty float64) (n float64, ok bool)
• func ParseHTTPArgs(r *http.Request) (tags []string, page, limit int, err error)
• func ParseHTTPArgsWithLimit(r *http.Request, defaultLimit int) (tags []string, page, limit int, err error)
• func ParseQueryHeightOrReturnBadRequest(w http.ResponseWriter, cliCtx context.CLIContext, r *http.Request) (context.CLIContext, bool)
• func ParseQueryParamBool(r *http.Request, param string) bool
• func ParseUint64OrReturnBadRequest(w http.ResponseWriter, s string) (n uint64, ok bool)
• func PostProcessResponse(w http.ResponseWriter, ctx context.CLIContext, resp interface{})
• func PostProcessResponseBare(w http.ResponseWriter, ctx context.CLIContext, body interface{})
• func ReadRESTReq(w http.ResponseWriter, r *http.Request, m codec.JSONMarshaler, req interface{}) bool
• func WriteErrorResponse(w http.ResponseWriter, status int, err string)
• func WriteSimulationResponse(w http.ResponseWriter, m codec.JSONMarshaler, gas uint64)
• type BaseReq
  • func NewBaseReq(from, memo, chainID string, gas, gasAdjustment string, accNumber, seq uint64, ...) BaseReq
  • func (br BaseReq) Sanitize() BaseReq
  • func (br BaseReq) ValidateBasic(w http.ResponseWriter) bool
• type ErrorResponse
  • func NewErrorResponse(code int, err string) ErrorResponse
• type GasEstimateResponse
• type ResponseWithHeight
  • func NewResponseWithHeight(height int64, result json.RawMessage) ResponseWithHeight

Constants

const (
	DefaultPage    = 1
	DefaultLimit   = 30             // should be consistent with tendermint/tendermint/rpc/core/pipe.go:19
	TxMinHeightKey = "tx.minheight" // Inclusive minimum height filter
	TxMaxHeightKey = "tx.maxheight" // Inclusive maximum height filter
)

Functions

func CheckBadRequestError

func CheckBadRequestError(w http.ResponseWriter, err error) bool

CheckBadRequestError attaches an error message to an HTTP 400 BAD REQUEST response. Returns false when err is nil; it returns true otherwise.

func CheckError

func CheckError(w http.ResponseWriter, status int, err error) bool

CheckError takes care of writing an error response if err is not nil. Returns false when err is nil; it returns true otherwise.

func CheckInternalServerError

func CheckInternalServerError(w http.ResponseWriter, err error) bool

CheckInternalServerError attaches an error message to an HTTP 500 INTERNAL SERVER ERROR response. Returns false when err is nil; it returns true otherwise.

func CheckNotFoundError

func CheckNotFoundError(w http.ResponseWriter, err error) bool

CheckNotFoundError attaches an error message to an HTTP 404 NOT FOUND response. Returns false when err is nil; it returns true otherwise.

func ParseFloat64OrReturnBadRequest

func ParseFloat64OrReturnBadRequest(w http.ResponseWriter, s string, defaultIfEmpty float64) (n float64, ok bool)

ParseFloat64OrReturnBadRequest converts s to a float64 value. It returns a default value, defaultIfEmpty, if the string is empty.

func ParseHTTPArgs

func ParseHTTPArgs(r *http.Request) (tags []string, page, limit int, err error)

ParseHTTPArgs parses the request's URL and returns a slice containing all arguments pairs. It separates page and limit used for pagination.

func ParseHTTPArgsWithLimit

func ParseHTTPArgsWithLimit(r *http.Request, defaultLimit int) (tags []string, page, limit int, err error)

ParseHTTPArgsWithLimit parses the request's URL and returns a slice containing all arguments pairs. It separates page and limit used for pagination where a default limit can be provided.

func ParseQueryHeightOrReturnBadRequest

func ParseQueryHeightOrReturnBadRequest(w http.ResponseWriter, cliCtx context.CLIContext, r *http.Request) (context.CLIContext, bool)

ParseQueryHeightOrReturnBadRequest sets the height to execute a query if set by the http request. It returns false if there was an error parsing the height.

func ParseQueryParamBool

func ParseQueryParamBool(r *http.Request, param string) bool

ParseQueryParamBool parses the given param to a boolean. It returns false by default if the string is not parseable to bool.

func ParseUint64OrReturnBadRequest

func ParseUint64OrReturnBadRequest(w http.ResponseWriter, s string) (n uint64, ok bool)

ParseUint64OrReturnBadRequest converts s to a uint64 value.

func PostProcessResponse

func PostProcessResponse(w http.ResponseWriter, ctx context.CLIContext, resp interface{})

PostProcessResponse performs post processing for a REST response. The result returned to clients will contain two fields, the height at which the resource was queried at and the original result.

func PostProcessResponseBare

func PostProcessResponseBare(w http.ResponseWriter, ctx context.CLIContext, body interface{})

PostProcessResponseBare post processes a body similar to PostProcessResponse except it does not wrap the body and inject the height.

func ReadRESTReq

func ReadRESTReq(w http.ResponseWriter, r *http.Request, m codec.JSONMarshaler, req interface{}) bool

ReadRESTReq reads and unmarshals a Request's body to the the BaseReq struct. Writes an error response to ResponseWriter and returns true if errors occurred.

func WriteErrorResponse

func WriteErrorResponse(w http.ResponseWriter, status int, err string)

WriteErrorResponse prepares and writes a HTTP error given a status code and an error message.

func WriteSimulationResponse

func WriteSimulationResponse(w http.ResponseWriter, m codec.JSONMarshaler, gas uint64)

WriteSimulationResponse prepares and writes an HTTP response for transactions simulations.

Types

type BaseReq

type BaseReq struct {
	From          string       `json:"from"`
	Memo          string       `json:"memo"`
	ChainID       string       `json:"chain_id"`
	AccountNumber uint64       `json:"account_number"`
	Sequence      uint64       `json:"sequence"`
	Fees          sdk.Coins    `json:"fees"`
	GasPrices     sdk.DecCoins `json:"gas_prices"`
	Gas           string       `json:"gas"`
	GasAdjustment string       `json:"gas_adjustment"`
	Simulate      bool         `json:"simulate"`
}

BaseReq defines a structure that can be embedded in other request structures that all share common "base" fields.

func NewBaseReq

func NewBaseReq(
	from, memo, chainID string, gas, gasAdjustment string, accNumber, seq uint64,
	fees sdk.Coins, gasPrices sdk.DecCoins, simulate bool,
) BaseReq

NewBaseReq creates a new basic request instance and sanitizes its values

func (BaseReq) Sanitize

func (br BaseReq) Sanitize() BaseReq

Sanitize performs basic sanitization on a BaseReq object.

func (BaseReq) ValidateBasic

func (br BaseReq) ValidateBasic(w http.ResponseWriter) bool

ValidateBasic performs basic validation of a BaseReq. If custom validation logic is needed, the implementing request handler should perform those checks manually.

type ErrorResponse

type ErrorResponse struct {
	Code  int    `json:"code,omitempty"`
	Error string `json:"error"`
}

ErrorResponse defines the attributes of a JSON error response.

func NewErrorResponse

func NewErrorResponse(code int, err string) ErrorResponse

NewErrorResponse creates a new ErrorResponse instance.

type GasEstimateResponse

type GasEstimateResponse struct {
	GasEstimate uint64 `json:"gas_estimate"`
}

GasEstimateResponse defines a response definition for tx gas estimation.

type ResponseWithHeight

type ResponseWithHeight struct {
	Height int64           `json:"height"`
	Result json.RawMessage `json:"result"`
}

ResponseWithHeight defines a response object type that wraps an original response with a height.

func NewResponseWithHeight

func NewResponseWithHeight(height int64, result json.RawMessage) ResponseWithHeight

NewResponseWithHeight creates a new ResponseWithHeight instance