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graphql: avoid greedy allocation (#27873)

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Fixes a graphql-dos

---------

Co-authored-by: Sina Mahmoodi <1591639+s1na@users.noreply.github.com>
Co-authored-by: Sina Mahmoodi <itz.s1na@gmail.com>
This commit is contained in:
Martin Holst Swende 2023-08-08 13:35:58 +02:00 committed by GitHub
parent 6d2bcb911a
commit 0d772b9f09
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 4 additions and 1 deletions
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5
graphql/graphql.go
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@ -1250,7 +1250,7 @@ func (r *Resolver) Blocks(ctx context.Context, args struct {
if to < from { if to < from {
return []*Block{}, nil return []*Block{}, nil
} }
ret := make([]*Block, 0, to-from+1) var ret []*Block
for i := from; i <= to; i++ { for i := from; i <= to; i++ {
numberOrHash := rpc.BlockNumberOrHashWithNumber(i) numberOrHash := rpc.BlockNumberOrHashWithNumber(i)
block := &Block{ block := &Block{
@ -1268,6 +1268,9 @@ func (r *Resolver) Blocks(ctx context.Context, args struct {
break break
} }
ret = append(ret, block) ret = append(ret, block)
if err := ctx.Err(); err != nil {
return nil, err
}
} }
return ret, nil return ret, nil
} }