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fix: Modify PEG rule to support escape chracter #774

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merged 7 commits into from
Jun 14, 2024
Merged

fix: Modify PEG rule to support escape chracter #774

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ef9e1ae
Modify PEG rule
tkxkd0159 Jun 13, 2024
b7b4b1c
Revert Go version
tkxkd0159 Jun 13, 2024
b1317c6
Add parser test case
tkxkd0159 Jun 13, 2024
8102890
chore
tkxkd0159 Jun 13, 2024
412f5bd
Add query match test
tkxkd0159 Jun 13, 2024
9ad1e4a
lint
tkxkd0159 Jun 13, 2024
346015b
chore
tkxkd0159 Jun 13, 2024
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6 changes: 4 additions & 2 deletions libs/pubsub/query/Makefile
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Original file line number Diff line number Diff line change
@@ -1,7 +1,9 @@
gen_query_parser:
go get -u -v github.com/pointlander/peg
gen_query_parser: peg
peg -inline -switch query.peg

peg:
@go install github.com/pointlander/peg@v1.0.1

fuzzy_test:
go get -u -v github.com/dvyukov/go-fuzz/go-fuzz
go get -u -v github.com/dvyukov/go-fuzz/go-fuzz-build
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6 changes: 6 additions & 0 deletions libs/pubsub/query/parser_test.go
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Expand Up @@ -84,6 +84,12 @@ func TestParser(t *testing.T) {

{"hash='136E18F7E4C348B780CF873A0BF43922E5BAFA63'", true},
{"hash=136E18F7E4C348B780CF873A0BF43922E5BAFA63", false},

{"root.dummy.v1.EventDummy.seq='\"1\"'", true},
{"root.dummy.v1.EventDummy.descr='\\\"slash included\\\"'", true},
{"root.dummy.v1.EventDummy.descr='\"single quote \\' included\"'", true},
{"root.dummy.v1.EventDummy.descr='\"single quote ' included\"'", false},
{"root.dummy.v1.EventDummy.descr='{\"object\":\"style\"}'", true},
}

for _, c := range cases {
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11 changes: 8 additions & 3 deletions libs/pubsub/query/query.go
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Expand Up @@ -39,10 +39,15 @@ type Condition struct {
// invalid.
func New(s string) (*Query, error) {
p := &QueryParser{Buffer: fmt.Sprintf(`"%s"`, s)}
p.Init()
err := p.Init()
if err != nil {
return nil, err
}

if err := p.Parse(); err != nil {
return nil, err
}

return &Query{str: s, parser: p}, nil
}

Expand Down Expand Up @@ -101,7 +106,7 @@ func (q *Query) Conditions() ([]Condition, error) {
buffer, begin, end := q.parser.Buffer, 0, 0

// tokens must be in the following order: tag ("tx.gas") -> operator ("=") -> operand ("7")
for token := range q.parser.Tokens() {
for _, token := range q.parser.Tokens() {
switch token.pegRule {
case rulePegText:
begin, end = int(token.begin), int(token.end)
Expand Down Expand Up @@ -213,7 +218,7 @@ func (q *Query) Matches(events map[string][]string) (bool, error) {
// tokens must be in the following order:

// tag ("tx.gas") -> operator ("=") -> operand ("7")
for token := range q.parser.Tokens() {
for _, token := range q.parser.Tokens() {
switch token.pegRule {
case rulePegText:
begin, end = int(token.begin), int(token.end)
Expand Down
2 changes: 1 addition & 1 deletion libs/pubsub/query/query.peg
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Expand Up @@ -15,7 +15,7 @@ condition <- tag ' '* (le ' '* (number / time / date)
)

tag <- < (![ \t\n\r\\()"'=><] .)+ >
value <- < '\'' (!["'] .)* '\''>
value <- < '\'' (('\\' .) / (!['] .))* '\''>
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number <- < ('0'
/ [1-9] digit* ('.' digit*)?) >
digit <- [0-9]
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