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128 lines
3.3 KiB
128 lines
3.3 KiB
package h
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import (
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"strings"
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. "github.com/alecthomas/chroma" // nolint
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"github.com/alecthomas/chroma/lexers/internal"
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)
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// HTTP lexer.
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var HTTP = internal.Register(httpBodyContentTypeLexer(MustNewLexer(
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&Config{
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Name: "HTTP",
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Aliases: []string{"http"},
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Filenames: []string{},
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MimeTypes: []string{},
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NotMultiline: true,
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DotAll: true,
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},
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Rules{
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"root": {
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{`(GET|POST|PUT|DELETE|HEAD|OPTIONS|TRACE|PATCH|CONNECT)( +)([^ ]+)( +)(HTTP)(/)([12]\.[01])(\r?\n|\Z)`, ByGroups(NameFunction, Text, NameNamespace, Text, KeywordReserved, Operator, LiteralNumber, Text), Push("headers")},
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{`(HTTP)(/)([12]\.[01])( +)(\d{3})( +)([^\r\n]+)(\r?\n|\Z)`, ByGroups(KeywordReserved, Operator, LiteralNumber, Text, LiteralNumber, Text, NameException, Text), Push("headers")},
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},
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"headers": {
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{`([^\s:]+)( *)(:)( *)([^\r\n]+)(\r?\n|\Z)`, EmitterFunc(httpHeaderBlock), nil},
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{`([\t ]+)([^\r\n]+)(\r?\n|\Z)`, EmitterFunc(httpContinuousHeaderBlock), nil},
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{`\r?\n`, Text, Push("content")},
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},
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"content": {
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{`.+`, EmitterFunc(httpContentBlock), nil},
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},
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},
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)))
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func httpContentBlock(groups []string, lexer Lexer) Iterator {
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tokens := []Token{
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{Generic, groups[0]},
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}
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return Literator(tokens...)
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}
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func httpHeaderBlock(groups []string, lexer Lexer) Iterator {
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tokens := []Token{
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{Name, groups[1]},
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{Text, groups[2]},
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{Operator, groups[3]},
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{Text, groups[4]},
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{Literal, groups[5]},
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{Text, groups[6]},
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}
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return Literator(tokens...)
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}
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func httpContinuousHeaderBlock(groups []string, lexer Lexer) Iterator {
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tokens := []Token{
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{Text, groups[1]},
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{Literal, groups[2]},
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{Text, groups[3]},
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}
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return Literator(tokens...)
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}
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func httpBodyContentTypeLexer(lexer Lexer) Lexer { return &httpBodyContentTyper{lexer} }
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type httpBodyContentTyper struct{ Lexer }
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func (d *httpBodyContentTyper) Tokenise(options *TokeniseOptions, text string) (Iterator, error) { // nolint: gocognit
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var contentType string
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var isContentType bool
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var subIterator Iterator
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it, err := d.Lexer.Tokenise(options, text)
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if err != nil {
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return nil, err
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}
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return func() Token {
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token := it()
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if token == EOF {
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if subIterator != nil {
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return subIterator()
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}
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return EOF
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}
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switch {
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case token.Type == Name && strings.ToLower(token.Value) == "content-type":
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{
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isContentType = true
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}
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case token.Type == Literal && isContentType:
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{
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isContentType = false
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contentType = strings.TrimSpace(token.Value)
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pos := strings.Index(contentType, ";")
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if pos > 0 {
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contentType = strings.TrimSpace(contentType[:pos])
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}
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}
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case token.Type == Generic && contentType != "":
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{
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lexer := internal.MatchMimeType(contentType)
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// application/calendar+xml can be treated as application/xml
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// if there's not a better match.
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if lexer == nil && strings.Contains(contentType, "+") {
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slashPos := strings.Index(contentType, "/")
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plusPos := strings.LastIndex(contentType, "+")
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contentType = contentType[:slashPos+1] + contentType[plusPos+1:]
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lexer = internal.MatchMimeType(contentType)
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}
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if lexer == nil {
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token.Type = Text
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} else {
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subIterator, err = lexer.Tokenise(nil, token.Value)
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if err != nil {
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panic(err)
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}
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return EOF
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}
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}
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}
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return token
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}, nil
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}
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