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Fix #3: fatal stack overflow

master
Thijs Nijman 2018-09-14 13:50:31 +02:00
parent 2dfc019ddc
commit c529673a50
2 changed files with 31 additions and 1 deletions
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2
microdata.go
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@ -167,10 +167,12 @@ func (p *Parser) readItem(item *Item, node *html.Node) {
itemref = strings.TrimSpace(itemref) itemref = strings.TrimSpace(itemref)
if refnode, exists := p.identifiedNodes[itemref]; exists { if refnode, exists := p.identifiedNodes[itemref]; exists {
if refnode != node {
p.readItem(subitem, refnode) p.readItem(subitem, refnode)
} }
} }
} }
}
for child := node.FirstChild; child != nil; { for child := node.FirstChild; child != nil; {
p.readItem(subitem, child) p.readItem(subitem, child)

28
microdata_test.go
View File

@ -8,6 +8,7 @@ package microdata
import ( import (
"bytes" "bytes"
"net/url" "net/url"
"reflect"
"strings" "strings"
"testing" "testing"
) )
@ -569,3 +570,30 @@ func TestJsonWithType(t *testing.T) {
t.Errorf("Expecting %s but got %s", expected, actual) t.Errorf("Expecting %s but got %s", expected, actual)
} }
} }
// This test checks stack overflow doesn't happen as mentioned in
// https://github.com/iand/microdata/issues/3
func TestSkipSelfReferencingItemref(t *testing.T) {
html := `<body itemscope itemtype="http://schema.org/WebPage">
<span id="1" itemscope itemtype="http://data-vocabulary.org/Breadcrumb" itemprop="child" itemref="1">
<a title="Foo" itemprop="url" href="/foo/bar"><span itemprop="title">Foo</span></a>
</span>
</body>`
actual := ParseData(html, t)
child := NewItem()
child.AddString("title", "Foo")
child.AddString("url", "http://example.com/foo/bar")
item := NewItem()
item.AddType("http://schema.org/WebPage")
item.AddItem("child", child)
expected := NewMicrodata()
expected.AddItem(item)
if !reflect.DeepEqual(expected, actual) {
t.Errorf("Expecting %s but got %s", expected, actual)
}
}