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How to use Next method of html Package

Best K6 code snippet using html.Next

node_test.go

Source:node_test.go

...16	}17	if err := checkNodeConsistency(n); err != nil {18		return err19	}20	for c := n.FirstChild; c != nil; c = c.NextSibling {21		if err := checkTreeConsistency1(c, depth+1); err != nil {22			return err23		}24	}25	return nil26}27// checkNodeConsistency checks that a node's parent/child/sibling relationships28// are consistent.29func checkNodeConsistency(n *Node) error {30	if n == nil {31		return nil32	}33	nParent := 034	for p := n.Parent; p != nil; p = p.Parent {35		nParent++36		if nParent == 1e4 {37			return fmt.Errorf("html: parent list looks like an infinite loop")38		}39	}40	nForward := 041	for c := n.FirstChild; c != nil; c = c.NextSibling {42		nForward++43		if nForward == 1e6 {44			return fmt.Errorf("html: forward list of children looks like an infinite loop")45		}46		if c.Parent != n {47			return fmt.Errorf("html: inconsistent child/parent relationship")48		}49	}50	nBackward := 051	for c := n.LastChild; c != nil; c = c.PrevSibling {52		nBackward++53		if nBackward == 1e6 {54			return fmt.Errorf("html: backward list of children looks like an infinite loop")55		}56		if c.Parent != n {57			return fmt.Errorf("html: inconsistent child/parent relationship")58		}59	}60	if n.Parent != nil {61		if n.Parent == n {62			return fmt.Errorf("html: inconsistent parent relationship")63		}64		if n.Parent == n.FirstChild {65			return fmt.Errorf("html: inconsistent parent/first relationship")66		}67		if n.Parent == n.LastChild {68			return fmt.Errorf("html: inconsistent parent/last relationship")69		}70		if n.Parent == n.PrevSibling {71			return fmt.Errorf("html: inconsistent parent/prev relationship")72		}73		if n.Parent == n.NextSibling {74			return fmt.Errorf("html: inconsistent parent/next relationship")75		}76		parentHasNAsAChild := false77		for c := n.Parent.FirstChild; c != nil; c = c.NextSibling {78			if c == n {79				parentHasNAsAChild = true80				break81			}82		}83		if !parentHasNAsAChild {84			return fmt.Errorf("html: inconsistent parent/child relationship")85		}86	}87	if n.PrevSibling != nil && n.PrevSibling.NextSibling != n {88		return fmt.Errorf("html: inconsistent prev/next relationship")89	}90	if n.NextSibling != nil && n.NextSibling.PrevSibling != n {91		return fmt.Errorf("html: inconsistent next/prev relationship")92	}93	if (n.FirstChild == nil) != (n.LastChild == nil) {94		return fmt.Errorf("html: inconsistent first/last relationship")95	}96	if n.FirstChild != nil && n.FirstChild == n.LastChild {97		// We have a sole child.98		if n.FirstChild.PrevSibling != nil || n.FirstChild.NextSibling != nil {99			return fmt.Errorf("html: inconsistent sole child's sibling relationship")100		}101	}102	seen := map[*Node]bool{}103	var last *Node104	for c := n.FirstChild; c != nil; c = c.NextSibling {105		if seen[c] {106			return fmt.Errorf("html: inconsistent repeated child")107		}108		seen[c] = true109		last = c110	}111	if last != n.LastChild {112		return fmt.Errorf("html: inconsistent last relationship")113	}114	var first *Node115	for c := n.LastChild; c != nil; c = c.PrevSibling {116		if !seen[c] {117			return fmt.Errorf("html: inconsistent missing child")118		}...

doc.go

Source:doc.go

...5Package html implements an HTML5-compliant tokenizer and parser.6Tokenization is done by creating a Tokenizer for an io.Reader r. It is the7caller's responsibility to ensure that r provides UTF-8 encoded HTML.8	z := html.NewTokenizer(r)9Given a Tokenizer z, the HTML is tokenized by repeatedly calling z.Next(),10which parses the next token and returns its type, or an error:11	for {12		tt := z.Next()13		if tt == html.ErrorToken {14			// ...15			return ...16		}17		// Process the current token.18	}19There are two APIs for retrieving the current token. The high-level API is to20call Token; the low-level API is to call Text or TagName / TagAttr. Both APIs21allow optionally calling Raw after Next but before Token, Text, TagName, or22TagAttr. In EBNF notation, the valid call sequence per token is:23	Next {Raw} [ Token | Text | TagName {TagAttr} ]24Token returns an independent data structure that completely describes a token.25Entities (such as "&lt;") are unescaped, tag names and attribute keys are26lower-cased, and attributes are collected into a []Attribute. For example:27	for {28		if z.Next() == html.ErrorToken {29			// Returning io.EOF indicates success.30			return z.Err()31		}32		emitToken(z.Token())33	}34The low-level API performs fewer allocations and copies, but the contents of35the []byte values returned by Text, TagName and TagAttr may change on the next36call to Next. For example, to extract an HTML page's anchor text:37	depth := 038	for {39		tt := z.Next()40		switch tt {41		case html.ErrorToken:42			return z.Err()43		case html.TextToken:44			if depth > 0 {45				// emitBytes should copy the []byte it receives,46				// if it doesn't process it immediately.47				emitBytes(z.Text())48			}49		case html.StartTagToken, html.EndTagToken:50			tn, _ := z.TagName()51			if len(tn) == 1 && tn[0] == 'a' {52				if tt == html.StartTagToken {53					depth++54				} else {55					depth--56				}57			}58		}59	}60Parsing is done by calling Parse with an io.Reader, which returns the root of61the parse tree (the document element) as a *Node. It is the caller's62responsibility to ensure that the Reader provides UTF-8 encoded HTML. For63example, to process each anchor node in depth-first order:64	doc, err := html.Parse(r)65	if err != nil {66		// ...67	}68	var f func(*html.Node)69	f = func(n *html.Node) {70		if n.Type == html.ElementNode && n.Data == "a" {71			// Do something with n...72		}73		for c := n.FirstChild; c != nil; c = c.NextSibling {74			f(c)75		}76	}77	f(doc)78The relevant specifications include:79https://html.spec.whatwg.org/multipage/syntax.html and80https://html.spec.whatwg.org/multipage/syntax.html#tokenization81*/82package html // import "golang.org/x/net/html"83// The tokenization algorithm implemented by this package is not a line-by-line84// transliteration of the relatively verbose state-machine in the WHATWG85// specification. A more direct approach is used instead, where the program86// counter implies the state, such as whether it is tokenizing a tag or a text87// node. Specification compliance is verified by checking expected and actual...

Using AI Code Generation

1import (2func main() {3	doc, err := html.Parse(os.Stdin)4	if err != nil {5		fmt.Fprintf(os.Stderr, "findlinks1: %v6		os.Exit(1)7	}8	for _, link := range visit(nil, doc) {9		fmt.Println(link)10	}11}12func visit(links []string, n *html.Node) []string {13	if n.Type == html.ElementNode && n.Data == "a" {14		for _, a := range n.Attr {15			if a.Key == "href" {16				links = append(links, a.Val)17			}18		}19	}20	for c := n.FirstChild; c != nil; c = c.NextSibling {21		links = visit(links, c)22	}23}24import (25func main() {26	doc, err := html.Parse(os.Stdin)27	if err != nil {28		fmt.Fprintf(os.Stderr, "findlinks2: %v29		os.Exit(1)30	}31	for _, link := range visit(nil, doc) {32		fmt.Println(link)33	}34}35func visit(links []string, n *html.Node) []string {36	if n.Type == html.ElementNode && n.Data == "a" {37		for _, a := range n.Attr {38			if a.Key == "href" {39				links = append(links, a.Val)40			}41		}42	}43	for c := n.FirstChild; c != nil; c = c.NextSibling {44		links = visit(links, c)45	}46}47import (48func main() {49	doc, err := html.Parse(os.Stdin)50	if err != nil {51		fmt.Fprintf(os.Stderr, "findlinks3: %v52		os.Exit(1)53	}54	for _, link := range visit(nil, doc) {55		fmt.Println(link)56	}57}58func visit(links []string, n *html.Node) []string {

Using AI Code Generation

1import (2func main() {3    doc, err := html.Parse(os.Stdin)4    if err != nil {5        log.Fatalf("findlinks1: %v", err)6    }7    for _, link := range visit(nil, doc) {8        fmt.Println(link)9    }10}11func visit(links []string, n *html.Node) []string {12    if n.Type == html.ElementNode && n.Data == "a" {13        for _, a := range n.Attr {14            if a.Key == "href" {15                links = append(links, a.Val)16            }17        }18    }19    for c := n.FirstChild; c != nil; c = c.NextSibling {20        links = visit(links, c)21    }22}23import (24func main() {25    doc, err := html.Parse(os.Stdin)26    if err != nil {27        log.Fatalf("findlinks2: %v", err)28    }29    for _, link := range visit(nil, doc) {30        fmt.Println(link)31    }32}33func visit(links []string, n *html.Node) []string {34    if n.Type == html.ElementNode && n.Data == "a" {35        for _, a := range n.Attr {36            if a.Key == "href" {37                links = append(links, a.Val)38            }39        }40    }41    if n.FirstChild != nil {42        links = visit(links, n.FirstChild)43    }44    if n.NextSibling != nil {45        links = visit(links, n.NextSibling)46    }47}48import (49func main() {50    doc, err := html.Parse(os.Stdin)51    if err != nil {52        log.Fatalf("findlinks3: %v", err)53    }54    for _, link := range visit(nil, doc) {55        fmt.Println(link)56    }57}58func visit(links []

Using AI Code Generation

1import (2func main() {3	doc, err := html.Parse(os.Stdin)4	if err != nil {5		fmt.Fprintf(os.Stderr, "findlinks1: %v6		os.Exit(1)7	}8	for _, link := range visit(nil, doc) {9		fmt.Println(link)10	}11}12func visit(links []string, n *html.Node) []string {13	if n.Type == html.ElementNode && n.Data == "a" {14		for _, a := range n.Attr {15			if a.Key == "href" {16				links = append(links, a.Val)17			}18		}19	}20	for c := n.FirstChild; c != nil; c = c.NextSibling {21		links = visit(links, c)22	}23}24import (25func main() {26	doc, err := html.Parse(os.Stdin)27	if err != nil {28		fmt.Fprintf(os.Stderr, "findlinks1: %v29		os.Exit(1)30	}31	for _, link := range visit(nil, doc) {32		fmt.Println(link)33	}34}35func visit(links []string, n *html.Node) []string {36	if n.Type == html.ElementNode && n.Data == "a" {37		for _, a := range n.Attr {38			if a.Key == "href" {39				links = append(links, a.Val)40			}41		}42	}43	for c := n.FirstChild; c != nil; c = c.NextSibling {44		links = visit(links, c)45	}46}47import (48func main() {49	doc, err := html.Parse(os.Stdin)50	if err != nil {51		fmt.Fprintf(os.Stderr, "findlinks1: %v52		os.Exit(1)53	}54	for _, link := range visit(nil, doc) {55		fmt.Println(link)56	}57}58func visit(links []string, n *html.Node) []string {

Using AI Code Generation

1import (2func main() {3    if err != nil {4        fmt.Println(err)5    }6    defer resp.Body.Close()7    doc, err := html.Parse(resp.Body)8    if err != nil {9        fmt.Println(err)10    }11    var f func(*html.Node)12    f = func(n *html.Node) {13        if n.Type == html.ElementNode {14            fmt.Println(n.Data)15        }16        for c := n.FirstChild; c != nil; c = c.NextSibling {17            f(c)18        }19    }20    f(doc)21}

Using AI Code Generation

1import (2func main() {3	for _, url := range os.Args[1:] {4		resp, err := http.Get(url)5		if err != nil {6			log.Fatal(err)7		}8		doc, err := html.Parse(resp.Body)9		resp.Body.Close()10		if err != nil {11			log.Fatal(err)12		}13		forEachNode(doc, startElement, endElement)14	}15}16func forEachNode(n *html.Node, pre, post func(n *html.Node)) {17	if pre != nil {18		pre(n)19	}20	for c := n.FirstChild; c != nil; c = c.NextSibling {21		forEachNode(c, pre, post)22	}23	if post != nil {24		post(n)25	}26}27func startElement(n *html.Node) {28	if n.Type == html.ElementNode {29		fmt.Printf("%*s<%s>\n", depth*2, "", n.Data)30	}31}32func endElement(n *html.Node) {33	if n.Type == html.ElementNode {34		fmt.Printf("%*s</%s>\n", depth*2, "", n.Data)35	}36}37import (38func main() {39	for _, url := range os.Args[1:] {40		resp, err := http.Get(url)41		if err != nil {42			log.Fatal(err)43		}44		doc, err := html.Parse(resp.Body)45		resp.Body.Close()46		if err != nil {47			log.Fatal(err)48		}49		forEachNode(doc, startElement, endElement)50	}51}52func forEachNode(n *html.Node, pre, post func(n *html.Node)) {53	if pre != nil {54		pre(n)55	}56	for c := n.FirstChild; c != nil; c = c.NextSibling {57		forEachNode(c, pre, post)58	}59	if post != nil {60		post(n)61	}62}63func startElement(n *html.Node) {64	if n.Type == html.ElementNode {65		fmt.Printf("%*s<%s

Using AI Code Generation

1import (2func main() {3    doc, err := html.Parse(os.Stdin)4    if err != nil {5        fmt.Fprintf(os.Stderr, "findlinks1: %v\n", err)6        os.Exit(1)7    }8    for _, link := range visit(nil, doc) {9        fmt.Println(link)10    }11}12func visit(links []string, n *html.Node) []string {13    if n.Type == html.ElementNode && n.Data == "a" {14        for _, a := range n.Attr {15            if a.Key == "href" {16                links = append(links, a.Val)17            }18        }19    }20    for c := n.FirstChild; c != nil; c = c.NextSibling {21        links = visit(links, c)22    }23}24import (25func main() {26    doc, err := html.Parse(os.Stdin)27    if err != nil {28        fmt.Fprintf(os.Stderr, "findlinks1: %v\n", err)29        os.Exit(1)30    }31    for _, link := range visit(nil, doc) {32        fmt.Println(link)33    }34}35func visit(links []string, n *html.Node) []string {36    if n.Type == html.ElementNode && n.Data == "a" {37        for _, a := range n.Attr {38            if a.Key == "href" {39                links = append(links, a.Val)40            }41        }42    }43    if n.FirstChild != nil {44        links = visit(links, n.FirstChild)45    }46    if n.NextSibling != nil {47        links = visit(links, n.NextSibling)48    }49}50import (51func main() {52    doc, err := html.Parse(os.Stdin)53    if err != nil {54        fmt.Fprintf(os.Stderr, "findlinks1: %v\n", err)55        os.Exit(1

Using AI Code Generation

1import (2func main() {3    if err != nil {4        fmt.Println(err)5    }6    doc, err := html.Parse(resp.Body)7    if err != nil {8        fmt.Println(err)9    }10    forEachNode(doc, startElement, endElement)11}12func startElement(n *html.Node) {13    if n.Type == html.ElementNode {14        fmt.Printf("<%s>", n.Data)15    }16}17func endElement(n *html.Node) {18    if n.Type == html.ElementNode {19        fmt.Printf("</%s>", n.Data)20    }21}22func forEachNode(n *html.Node, pre, post func(n *html.Node)) {23    if pre != nil {24        pre(n)25    }26    for c := n.FirstChild; c != nil; c = c.NextSibling {27        forEachNode(c, pre, post)28    }29    if post != nil {30        post(n)31    }32}

Using AI Code Generation

1import (2func main() {3	doc, err := html.Parse(os.Stdin)4	if err != nil {5		fmt.Fprintf(os.Stderr, "findlinks1: %v\n", err)6		os.Exit(1)7	}8	for _, link := range visit(nil, doc) {9		fmt.Println(link)10	}11}12func visit(links []string, n *html.Node) []string {13	if n.Type == html.ElementNode && n.Data == "a" {14		for _, a := range n.Attr {15			if a.Key == "href" {16				links = append(links, a.Val)17			}18		}19	}20	for c := n.FirstChild; c != nil; c = c.NextSibling {21		links = visit(links, c)22	}23}24import (25func main() {26	doc, err := html.Parse(os.Stdin)27	if err != nil {28		fmt.Fprintf(os.Stderr, "findlinks1: %v\n", err)29		os.Exit(1)30	}31	for _, link := range visit(nil, doc) {32		fmt.Println(link)33	}34}35func visit(links []string, n *html.Node) []string {36	if n.Type == html.ElementNode && n.Data == "a" {37		for _, a := range n.Attr {38			if a.Key == "href" {39				links = append(links, a.Val)40			}41		}42	}43	for c := n.FirstChild; c != nil; c = c.NextSibling {44		links = visit(links, c)45	}46}47import (

Using AI Code Generation

1import (2func main() {3	if err != nil {4		log.Fatal(err)5	}6	defer resp.Body.Close()7	doc, err := html.Parse(resp.Body)8	if err != nil {9		log.Fatal(err)10	}11	forEachNode(doc, startElement, endElement)12}13func forEachNode(n *html.Node, pre, post func(n *html.Node)) {14	if pre != nil {15		pre(n)16	}17	for c := n.FirstChild; c != nil; c = c.NextSibling {18		forEachNode(c, pre, post)19	}20	if post != nil {21		post(n)22	}23}24func startElement(n *html.Node) {25	if n.Type == html.ElementNode {26		fmt.Printf("<%s", n.Data)27		for _, a := range n.Attr {28			fmt.Printf(" %s='%s'", a.Key, a.Val)29		}30		fmt.Printf(">\n")31	}32}33func endElement(n *html.Node) {34	if n.Type == html.ElementNode {35		fmt.Printf("</%s>\n", n.Data)36	}37}

Using AI Code Generation

1import (2func main() {3	if err != nil {4		fmt.Println(err)5	}6	defer resp.Body.Close()7	doc, err := html.Parse(resp.Body)8	if err != nil {9		fmt.Println(err)10	}11	var f func(*html.Node)12	f = func(n *html.Node) {13		if n.Type == html.ElementNode {14			fmt.Println(n.Data)15		}16		for c := n.FirstChild; c != nil; c = c.NextSibling {17			f(c)18		}19	}20	f(doc)21}22import (23func main() {24	if err != nil {25		fmt.Println(err)26	}27	defer resp.Body.Close()28	doc, err := html.Parse(resp.Body)29	if err != nil {30		fmt.Println(err)31	}

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