mirror of
https://github.com/luxfi/utils.git
synced 2026-10-30 15:13:57 +00:00
zeekay
561897a9dd
Moves the JSON-RPC numeric wrappers (Uint8/16/32/64, Float32/64) and the gorilla/rpc lowercase Codec helper into the canonical luxfi/utils module. Replaces github.com/luxfi/codec/jsonrpc which has been retained only as a historical artefact of the codec module rip. All Lux modules that need JSON-RPC numeric quoting now have one canonical import: import "github.com/luxfi/utils/json" Identical API to codec/jsonrpc: Uint64.MarshalJSON quotes as decimal string, NewCodec returns a gorilla/rpc Codec that uppercases the first method letter.
66 lines
1.9 KiB
Go
66 lines
1.9 KiB
Go
// Copyright (C) 2019-2025, Lux Industries, Inc. All rights reserved.
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// See the file LICENSE for licensing terms.
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// Package json provides JSON serialization utilities for numeric types and
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// a gorilla/rpc Codec that normalizes lowercase method names.
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package json
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import (
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"errors"
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"fmt"
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"net/http"
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"strings"
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"unicode"
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"unicode/utf8"
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"github.com/gorilla/rpc/v2"
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"github.com/gorilla/rpc/v2/json2"
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)
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// Null is the string representation of the JSON null literal.
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const Null = "null"
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var (
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errUppercaseMethod = errors.New("method must start with a non-uppercase letter")
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errInvalidArg = errors.New("couldn't unmarshal an argument. Ensure arguments are valid and properly formatted. See documentation for example calls")
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)
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// NewCodec returns a new json codec that requires the first character of the
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// method name to be lowercase and upper-cases it for dispatch.
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func NewCodec() rpc.Codec {
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return lowercase{json2.NewCodec()}
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}
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type lowercase struct{ *json2.Codec }
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func (lc lowercase) NewRequest(r *http.Request) rpc.CodecRequest {
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return &request{lc.Codec.NewRequest(r).(*json2.CodecRequest)}
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}
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type request struct{ *json2.CodecRequest }
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func (r *request) Method() (string, error) {
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method, err := r.CodecRequest.Method()
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methodSections := strings.SplitN(method, ".", 2)
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if len(methodSections) != 2 || err != nil {
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return method, err
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}
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class, function := methodSections[0], methodSections[1]
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firstRune, runeLen := utf8.DecodeRuneInString(function)
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if firstRune == utf8.RuneError {
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return method, nil
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}
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if unicode.IsUpper(firstRune) {
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return method, errUppercaseMethod
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}
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uppercaseRune := string(unicode.ToUpper(firstRune))
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return fmt.Sprintf("%s.%s%s", class, uppercaseRune, function[runeLen:]), nil
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}
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func (r *request) ReadRequest(args interface{}) error {
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if err := r.CodecRequest.ReadRequest(args); err != nil {
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return errInvalidArg
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}
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return nil
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}
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