Ejemplo n.º 1
0
func ExampleParse() {
	s := `<p>Links:</p><ul><li><a href="foo">Foo</a><li><a href="/bar/baz">BarBaz</a></ul>`
	doc, err := html.Parse(strings.NewReader(s))
	if err != nil {
		log.Fatal(err)
	}
	var f func(*html.Node)
	f = func(n *html.Node) {
		if n.Type == html.ElementNode && n.Data == "a" {
			for _, a := range n.Attr {
				if a.Key == "href" {
					fmt.Println(a.Val)
					break
				}
			}
		}
		for c := n.FirstChild; c != nil; c = c.NextSibling {
			f(c)
		}
	}
	f(doc)
	// Output:
	// foo
	// /bar/baz
}
Ejemplo n.º 2
0
func MustParseHTML(doc string) *html.Node {
	dom, err := html.Parse(strings.NewReader(doc))
	if err != nil {
		panic(err)
	}
	return dom
}
Ejemplo n.º 3
0
// NewDocumentFromReader returns a Document from a generic reader.
// It returns an error as second value if the reader's data cannot be parsed
// as html. It does *not* check if the reader is also an io.Closer, so the
// provided reader is never closed by this call, it is the responsibility
// of the caller to close it if required.
func NewDocumentFromReader(r io.Reader) (*Document, error) {
	root, e := html.Parse(r)
	if e != nil {
		return nil, e
	}
	return newDocument(root, nil), nil
}
Ejemplo n.º 4
0
func TestNewDocument(t *testing.T) {
	if f, e := os.Open("./testdata/page.html"); e != nil {
		t.Error(e.Error())
	} else {
		defer f.Close()
		if node, e := html.Parse(f); e != nil {
			t.Error(e.Error())
		} else {
			doc = NewDocumentFromNode(node)
		}
	}
}
Ejemplo n.º 5
0
func loadDoc(page string) *Document {
	var f *os.File
	var e error

	if f, e = os.Open(fmt.Sprintf("./testdata/%s", page)); e != nil {
		panic(e.Error())
	}
	defer f.Close()

	var node *html.Node
	if node, e = html.Parse(f); e != nil {
		panic(e.Error())
	}
	return NewDocumentFromNode(node)
}
Ejemplo n.º 6
0
// NewDocumentFromResponse is another Document constructor that takes an http response as argument.
// It loads the specified response's document, parses it, and stores the root Document
// node, ready to be manipulated. The response's body is closed on return.
func NewDocumentFromResponse(res *http.Response) (*Document, error) {
	if res == nil {
		return nil, errors.New("Response is nil")
	}
	defer res.Body.Close()
	if res.Request == nil {
		return nil, errors.New("Response.Request is nil")
	}

	// Parse the HTML into nodes
	root, e := html.Parse(res.Body)
	if e != nil {
		return nil, e
	}

	// Create and fill the document
	return newDocument(root, res.Request.URL), nil
}
Ejemplo n.º 7
0
func TestSelectors(t *testing.T) {
	for _, test := range selectorTests {
		s, err := Compile(test.selector)
		if err != nil {
			t.Errorf("error compiling %q: %s", test.selector, err)
			continue
		}

		doc, err := html.Parse(strings.NewReader(test.HTML))
		if err != nil {
			t.Errorf("error parsing %q: %s", test.HTML, err)
			continue
		}

		matches := s.MatchAll(doc)
		if len(matches) != len(test.results) {
			t.Errorf("wanted %d elements, got %d instead", len(test.results), len(matches))
			continue
		}

		for i, m := range matches {
			got := nodeString(m)
			if got != test.results[i] {
				t.Errorf("wanted %s, got %s instead", test.results[i], got)
			}
		}

		firstMatch := s.MatchFirst(doc)
		if len(test.results) == 0 {
			if firstMatch != nil {
				t.Errorf("MatchFirst: want nil, got %s", nodeString(firstMatch))
			}
		} else {
			got := nodeString(firstMatch)
			if got != test.results[0] {
				t.Errorf("MatchFirst: want %s, got %s", test.results[0], got)
			}
		}
	}
}