xmlparse

README

xmlparse

Golang package for parsing xml data.

Examples:

package main

import (
	"encoding/xml"
	"io"

	"github.com/egnd/go-toolbox/xmlparse"
	"github.com/egnd/go-toolbox/xmlparse/fb2"
)

func main() {
	var reader io.Reader
	var fb2Doc fb2.File

	// get fb2 struct by xml decoder
	if err := xml.NewDecoder(reader).Decode(&fb2Doc); err != nil {
		panic(err)
	}

	// get fb2 struct by configured xml decoder
	if err := xmlparse.NewDecoder(reader).Decode(&fb2Doc); err != nil {
		panic(err)
	}

	// get fb2 struct by parsing
	if fb2Doc, err := fb2.NewFile(xmlparse.NewDecoder(reader)); err != nil {
		panic(err)
	}

	// get fb2 struct by parsing withour "binary" images
	if fb2Doc, err := fb2.NewFile(xmlparse.NewDecoder(reader),
		func(next xmlparse.TokenHandler) xmlparse.TokenHandler {
			return func(obj interface{}, node xml.StartElement, r xmlparse.TokenReader) (err error) {
				if _, ok := obj.(*fb2.File); ok && node.Name.Local == "binary" {
					return xmlparse.TokenSkip(node.Name.Local, r)
				}

				return next(obj, node, r)
			}
		},
	); err != nil {
		panic(err)
	}
}

Benchmarks:

goos: linux
goarch: amd64
cpu: AMD Ryzen 7 5800U with Radeon Graphics         

Benchmark_Decoders/xml-16                    40   45330854 ns/op   4719552 B/op   6126 allocs/op
Benchmark_Decoders/xmlparse-16               33   43500593 ns/op   4723757 B/op   6390 allocs/op

Benchmark_Parsers_XML/rules_0-16             40   28759416 ns/op   2280436 B/op   3711 allocs/op
Benchmark_Parsers_XML/rules_1-16             55   31546185 ns/op   2280525 B/op   3719 allocs/op
Benchmark_Parsers_XML/rules_10-16            42   27412632 ns/op   2281527 B/op   3791 allocs/op
Benchmark_Parsers_XML/rules_100-16           52   29062773 ns/op   2292956 B/op   4510 allocs/op
Benchmark_Parsers_XML/rules_500-16           39   29684596 ns/op   2344098 B/op   7711 allocs/op
Benchmark_Parsers_XML/rules_1000-16          48   30376356 ns/op   2408053 B/op  11710 allocs/op

Benchmark_Parsers_XMLParsing/rules_0-16      56   30635241 ns/op   2284448 B/op   3975 allocs/op
Benchmark_Parsers_XMLParsing/rules_1-16      55   30133415 ns/op   2284929 B/op   3983 allocs/op
Benchmark_Parsers_XMLParsing/rules_10-16     55   29089623 ns/op   2285676 B/op   4054 allocs/op
Benchmark_Parsers_XMLParsing/rules_100-16    50   26225184 ns/op   2297209 B/op   4775 allocs/op
Benchmark_Parsers_XMLParsing/rules_500-16    54   30522089 ns/op   2348453 B/op   7975 allocs/op
Benchmark_Parsers_XMLParsing/rules_1000-16   38   32811054 ns/op   2412510 B/op  11975 allocs/op

Documentation

Overview

Package xmlparse contains tools for xml parsing

Index

• func GetStrFrom(items []string) string
• func NewDecoder(reader io.Reader) *xml.Decoder
• func TokenRead(tokenName string, reader TokenReader) (res string, err error)
• func TokenSkip(tokenName string, reader TokenReader) (err error)
• func Unmarshal(data []byte, v any) (err error)
• type Rule
• type TokenHandler
  • func WrapRules(rules []Rule, handler TokenHandler) TokenHandler
• type TokenReader

Functions

func GetStrFrom

func GetStrFrom(items []string) string

GetStrFrom returns first not empty string from slice.

func NewDecoder

func NewDecoder(reader io.Reader) *xml.Decoder

NewDecoder creates decoder for xml data.

func TokenRead

func TokenRead(tokenName string, reader TokenReader) (res string, err error)

TokenRead returns xml token inner content.

func TokenSkip

func TokenSkip(tokenName string, reader TokenReader) (err error)

TokenSkip skips current token at reader.

func Unmarshal

func Unmarshal(data []byte, v any) (err error)

Unmarshal converts xml data to some struct.

Types

type Rule

type Rule func(next TokenHandler) TokenHandler

Rule middleware for TokenHandler.

type TokenHandler

type TokenHandler func(interface{}, xml.StartElement, TokenReader) error

TokenHandler handler for fb2 tokens.

func WrapRules

func WrapRules(rules []Rule, handler TokenHandler) TokenHandler

WrapRules builds chain of rules.

type TokenReader

type TokenReader interface {
	xml.TokenReader
}

TokenReader token reader interface.