How to use QuerySelector method of html Package

Best K6 code snippet using html.QuerySelector

main.go

Source:main.go Github

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...28 examplesFS embed.FS29)30func main() {31 exampleNames := playground.ListFileNames(examplesFS, "examples")32 selectExample := window.Document.QuerySelector("select#select-example").(browser.Element)33 for _, name := range exampleNames {34 option := window.Document.CreateElement("option")35 option.SetAttribute("value", name)36 option.AppendChild(window.Document.CreateTextNode(name))37 selectExample.Append(option)38 }39 updateExampleCode(exampleNames[0])40 exampleChangeHandler := browser.NewEventListenerFunc(updateExampleCodeHandler)41 defer exampleChangeHandler.Release()42 selectExample.AddEventListener("change", exampleChangeHandler)43 runButton := window.Document.QuerySelector("button#run").(browser.Element)44 var runCount int6445 runBtnClickHandler := browser.NewEventListenerFunc(func(event browser.Event) {46 atomic.AddInt64(&runCount, 1)47 go handleRun(int(runCount))48 })49 defer runBtnClickHandler.Release()50 runButton.AddEventListener("click", runBtnClickHandler)51 editorEl := window.Document.QuerySelector("#editor")52 editorEl.RemoveAttribute("hidden")53 defer editorEl.SetAttribute("hidden", "")54 messageHandler := browser.NewEventListenerFunc(func(event browser.Event) {55 d := js.Value(event).Get("data")56 messageName := d.Get("name").String()57 runNode := window.Document.QuerySelector(fmt.Sprintf(`[data-run-id="%d"]`, d.Get("runID").Int()))58 if runNode == nil {59 return60 }61 runBox, ok := runNode.(browser.Element)62 if !ok || runBox.Attribute("data-run-id") != strconv.Itoa(d.Get("runID").Int()) {63 return64 }65 switch messageName {66 case "exit":67 exitStatusTemplate := /* language=gohtml */ ` <div class="exit-status"><pre>exit code {{.ExitCode}} after {{.Duration.String}}</pre></div>`68 exitCode := d.Get("exitCode").Int()69 duration := time.Duration(d.Get("duration").Int()) * time.Millisecond70 exitStatusTemplate = strings.Replace(exitStatusTemplate, `{{.ExitCode}}`, strconv.Itoa(exitCode), 1)71 exitStatusTemplate = strings.Replace(exitStatusTemplate, `{{.Duration.String}}`, duration.String(), 1)72 runBox.InsertAdjacentHTML(dom.PositionBeforeEnd, exitStatusTemplate)73 case "writeSync":74 writeSyncBuf := make([]byte, d.Get("buf").Length())75 js.CopyBytesToGo(writeSyncBuf, d.Get("buf"))76 writeSyncMessage := struct {77 Buf string78 FD int79 }{80 Buf: string(writeSyncBuf),81 FD: d.Get("fd").Int(),82 }83 stdout := runBox.QuerySelector(".stdout")84 stdout.Append(window.Document.CreateTextNode(writeSyncMessage.Buf))85 }86 })87 defer messageHandler.Release()88 window.AddEventListener("message", messageHandler)89 select {}90}91func handleRun(runID int) {92 codeTextareaEl := window.Document.QuerySelector("textarea#code").(browser.Element)93 codeTextarea := browser.Input(codeTextareaEl).Value()94 req, err := http.NewRequest(http.MethodPost, "/go/run", strings.NewReader(codeTextarea))95 if err != nil {96 fmt.Println("failed to create request", err)97 return98 }99 res, err := http.DefaultClient.Do(req)100 if err != nil {101 fmt.Println("failed to do request", err)102 return103 }104 defer func() {105 _ = res.Body.Close()106 }()107 if res.StatusCode != http.StatusOK {108 buf, err := io.ReadAll(res.Body)109 if err != nil {110 fmt.Println("failed to read response", err)111 return112 }113 window.Document.QuerySelector("pre#stderr").ReplaceChildren(window.Document.CreateTextNode(string(buf)))114 return115 }116 window.Document.QuerySelector("pre#stderr").ReplaceChildren()117 _, params, err := mime.ParseMediaType(res.Header.Get("Content-Type"))118 if err != nil {119 fmt.Println("failed to parse response mimetype", err)120 return121 }122 r := multipart.NewReader(res.Body, params["boundary"])123 for {124 part, err := r.NextRawPart()125 if err != nil {126 if err != io.EOF {127 fmt.Println("failed to read response part", err)128 return129 }130 break131 }132 switch part.FormName() {133 case "stdout":134 buf, err := io.ReadAll(part)135 if err != nil {136 fmt.Println("failed to read response stdout", err)137 return138 }139 window.Document.QuerySelector("pre#stdout").ReplaceChildren(window.Document.CreateTextNode(string(buf)))140 case "stderr":141 buf, err := io.ReadAll(part)142 if err != nil {143 fmt.Println("failed to read response stdout", err)144 return145 }146 window.Document.QuerySelector("pre#stderr").ReplaceChildren(window.Document.CreateTextNode(string(buf)))147 case "output":148 buf, err := ioutil.ReadAll(part)149 if err != nil {150 fmt.Println("failed to read response output", err)151 return152 }153 runWASM(runID, buf)154 }155 }156}157func runWASM(runID int, buf []byte) {158 const runHTML = /* language=html */ `<div class="run" data-run-id="">159 <button class="close" style="font-weight: bolder; color: var(--fuchsia)">x</button>160 <input id="hide-window" type="checkbox" style="display: none;">161 <label for="hide-window" class="button" style="font-weight: bolder;"></label>162 <iframe163 class="run"164 srcdoc=""165 title="Run"166 sandbox="allow-scripts"167 ></iframe>168 <pre class="stdout"></pre>169 </div>`170 origin := js.Global().Get("location").Get("origin").String()171 runIDString := strconv.Itoa(runID)172 htmlTemplate := window.Document.CreateElement("html").(browser.Element)173 htmlTemplate.InsertAdjacentHTML(dom.PositionAfterBegin, runHTMLHEAD)174 htmlTemplate.QuerySelector(`meta[name="go-playground-webapp-location"]`).SetAttribute("content", origin)175 htmlTemplate.QuerySelector(`meta[name="go-playground-run-id"]`).SetAttribute("content", runIDString)176 wasmExecScriptEl := window.Document.CreateElement("script")177 wasmExecScriptEl.ReplaceChildren(window.Document.CreateTextNode(wasmExec))178 htmlTemplate.InsertBefore(wasmExecScriptEl, htmlTemplate.QuerySelector("script"))179 htmlTemplate.InsertAdjacentHTML(dom.PositionBeforeEnd, "<body></body>")180 var sb strings.Builder181 sb.WriteString("<!doctype html>")182 sb.WriteString(htmlTemplate.OuterHTML())183 temporaryNode := window.Document.CreateElement("div").(browser.Element)184 temporaryNode.SetInnerHTML(runHTML)185 temporaryNode.QuerySelector("iframe.run").SetAttribute("srcdoc", sb.String())186 runBox := temporaryNode.FirstChild().(browser.Element)187 runBox.SetAttribute("data-run-id", runIDString)188 frame := runBox.QuerySelector("iframe.run").(browser.Element)189 var resources []interface {190 Release()191 }192 loadEventListener := browser.NewEventListenerFunc(func(event browser.Event) {193 message := window.NewObject()194 message.Set("name", "binary")195 array := window.NewUint8ClampedArray(len(buf))196 _ = js.CopyBytesToJS(array, buf)197 message.Set("binary", array)198 js.Value(frame).Get("contentWindow").Call("postMessage", message, "*")199 })200 resources = append(resources, loadEventListener)201 frame.AddEventListener("load", loadEventListener)202 closeBtn := runBox.QuerySelector("button.close").(browser.Element)203 closeEventListener := browser.NewEventListenerFunc(func(event browser.Event) {204 divRun := runBox.Closest("div.run")205 js.Value(frame).Get("contentWindow").Call("close")206 divRun.ParentElement().RemoveChild(divRun)207 for _, resource := range resources {208 resource.Release()209 }210 })211 resources = append(resources, closeEventListener)212 closeBtn.AddEventListener("click", closeEventListener)213 window.Document.QuerySelector("main").Append(runBox)214}215func updateExampleCodeHandler(event browser.Event) {216 updateExampleCode(event.Target().(dom.InputElement).Value())217}218func updateExampleCode(name string) {219 f, _ := examplesFS.Open(filepath.Join("examples", name, "main.go"))220 defer func() {221 _ = f.Close()222 }()223 buf, _ := io.ReadAll(f)224 browser.Input(window.Document.QuerySelector("textarea#code").(browser.Element)).SetValue(string(buf))225}...

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scraper_chromedp.go

Source:scraper_chromedp.go Github

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1package main2import (3 "context"4 "log"5 "time"6 "strings"7 cdp "github.com/knq/chromedp"8 // cdptypes "github.com/knq/chromedp/cdp"9)10func main() {11 var err error12 // create context13 ctxt, cancel := context.WithCancel(context.Background())14 defer cancel()15 // create chrome instance16 // c, err := cdp.New(ctxt, cdp.WithLog(log.Printf))17 c, err := cdp.New(ctxt)18 if err != nil {19 log.Fatal(err)20 }21 // Run task to get the RaceList22 var resRaceList [][]string23 err = c.Run(ctxt, getTodayResults(&resRaceList))24 if err != nil {25 log.Fatal(err)26 }27 log.Printf("====================RaceList=============================\n%#v", resRaceList)28 //Run task to get the result dogs29 for i := 0; i < len(resRaceList); i++ {30 for j := 0; j < (len(resRaceList[i]) - 1) / 2; j++ {31 indexDog := (j + 1) * 2;32 raceDetailLink := resRaceList[i][indexDog];33 var resResultDogs [][]string34 var resResultTitle string35 var resWatchURL string36 err = c.Run(ctxt, getResultsDogs(raceDetailLink, &resResultTitle, &resWatchURL, &resResultDogs))37 if err != nil {38 log.Fatal(err)39 }40 var eventNumber string = strings.Split(resResultTitle, " ")[1]41 var eventDistance string = strings.Split(resResultTitle, " ")[4]42 log.Printf("=================================================");43 log.Printf("raceDetailLink: %s", raceDetailLink)44 // log.Printf("Title: %s", resResultTitle)45 log.Printf("eventNumber: %s", eventNumber)46 log.Printf("eventDistance: %s", eventDistance)47 log.Printf("URL: %s", resWatchURL)48 log.Printf("Dogs: %s", resResultDogs)49 50 //Run task to get the runner info51 for k := 0; k < len(resResultDogs); k++ {52 runnerLink := resResultDogs[k][0];53 var resLifeTimeInfo [][]string54 var resName string55 var resSireName string56 var resDamName string57 err = c.Run(ctxt, getResultsRunner(runnerLink, &resName, &resSireName, &resDamName, &resLifeTimeInfo))58 if err != nil {59 log.Fatal(err)60 }61 log.Printf("=================================================");62 log.Printf("Name: %s", resName)63 log.Printf("resSireName: %s", resSireName)64 log.Printf("resDamName: %s", resDamName)65 log.Printf("resLifeTimeInfo: %v", resLifeTimeInfo)66 }67 }68 }69 // shutdown chrome70 err = c.Shutdown(ctxt)71 if err != nil {72 log.Fatal(err)73 }74 // wait for chrome to finish75 err = c.Wait()76 if err != nil {77 log.Fatal(err)78 }79 80 81}82func jsGetRaceList(sel string) (js string) {83 const funcJS = `function getText(sel) {84 var text = [];85 var elements = document.body.querySelectorAll(sel);86 for(var i = 0; i < elements.length; i++) {87 var raceInfo = [];88 var current = elements[i];89 var raceName = current.querySelector('.results-race-name h4').innerHTML;90 raceInfo.push(raceName);91 var raceList = [];92 timeElements = current.querySelectorAll('.results-race-list-wrapper .results-race-list-row a')93 for(var k = 0; k < timeElements.length; k++) {94 timeElement = timeElements[k];95 var timeStr = timeElement.innerHTML;96 var timeLink = timeElement.href;97 raceInfo.push(timeStr);98 raceInfo.push(timeLink);99 }100 text.push(raceInfo);101 // if(current.children.length === 0 && current.textContent.replace(/ |\n/g,'') !== '') {102 // Check the element has no children && that it is not empty103 // text.push(current.textContent + ',');104 // }105 }106 return text107 };`108 invokeFuncJS := `var a = getText('` + sel + `'); a;`109 return strings.Join([]string{funcJS, invokeFuncJS}, " ")110}111func getTodayResults(res *[][]string) cdp.Tasks {112 today := time.Now()113 yesterday := today.AddDate(0, 0, -1)114 strYesterday := yesterday.Format("2006-01-02")115 textSel := ".raceList li"116 jsText := jsGetRaceList(textSel)117 // fmt.Println("jsText: " + jsText);118 return cdp.Tasks{119 cdp.Navigate("http://greyhoundbet.racingpost.com/#results-list/r_date=" + strYesterday),120 cdp.WaitVisible("latestResults", cdp.ByID),121 cdp.Evaluate(jsText, res),122 }123}124//------------------------------ Result dogs ------------------------------- //125func jsGetResultDogs(sel string) (js string) {126 const funcJS = `function getText(sel) {127 var text = [];128 var elements = document.body.querySelectorAll(sel);129 for(var i = 0; i < elements.length; i++) {130 var current = elements[i];131 var refLink = current.href;132 var result = current.querySelector('.result');133 var finishPosition = result.querySelector('.place').innerHTML.split('<')[0].trim();134 var competitorName = result.querySelector('.info .holder .result-dog-name-details .name').innerHTML.trim();135 var finishTime = result.querySelector('.info .holder .dog-cols .col1').innerHTML.replace(/\&nbsp;/g, '').trim();136 var dogInfo = [];137 dogInfo.push(refLink);138 dogInfo.push(finishPosition);139 dogInfo.push(competitorName);140 dogInfo.push(finishTime);141 text.push(dogInfo);142 }143 return text144 };`145 invokeFuncJS := `var a = getText('` + sel + `'); a;`146 return strings.Join([]string{funcJS, invokeFuncJS}, " ")147}148func getResultsDogs(urlLink string, resTitle *string, resMediaURL *string, res *[][]string) cdp.Tasks {149 textSel := ".meetingResultsList .container .details"150 jsText := jsGetResultDogs(textSel)151 // fmt.Println("jsText: " + jsText);152 return cdp.Tasks{153 cdp.Navigate(urlLink),154 cdp.WaitNotPresent("pageLoading", cdp.ByID),155 cdp.WaitVisible("circle-race-title", cdp.ByID),156 cdp.Text("circle-race-title", resTitle),157 cdp.EvaluateAsDevTools("document.querySelector('.raceTitle .buttonsBox a') ? document.querySelector('.raceTitle .buttonsBox a').href : ''", resMediaURL),158 cdp.Evaluate(jsText, res),159 }160}161//------------------------------ Result runner ------------------------------- //162func jsGetResultRunner(sel string) (js string) {163 const funcJS = `function getText(sel) {164 var text = [];165 var elements = document.body.querySelectorAll(sel);166 //Skip the first row which is a header167 for(var i = 1; i < elements.length; i++) {168 var current = elements[i];169 var tdElements = current.querySelectorAll('td');170 var date = tdElements[0].contentText;171 var venueName = tdElements[1].innerHTML;172 var distance = tdElements[2].innerHTML;173 var sectionalData = tdElements[5].innerHTML;174 var finishingPos = tdElements[6].innerHTML;175 var weight = tdElements[12].innerHTML;176 var finishingTime = tdElements[15].innerHTML;177 var mediaURL = tdElements[0].querySelector('a') ? tdElements[0].querySelector('a').href : '';178 var competitorName = tdElements[8].textContent;179 var runnerInfo = [];180 runnerInfo.push(date);181 runnerInfo.push(venueName);182 runnerInfo.push(distance);183 runnerInfo.push(sectionalData);184 runnerInfo.push(finishingPos);185 runnerInfo.push(weight);186 runnerInfo.push(finishingTime);187 runnerInfo.push(mediaURL);188 runnerInfo.push(competitorName);189 190 text.push(runnerInfo);191 }192 return text193 };`194 invokeFuncJS := `var a = getText('` + sel + `'); a;`195 return strings.Join([]string{funcJS, invokeFuncJS}, " ")196}197func getResultsRunner(urlLink string, resName *string, resSireName *string, resDamName *string, res *[][]string) cdp.Tasks {198 textSel := "#sortableTable tbody tr"199 jsText := jsGetResultRunner(textSel)200 // log.Println("jsText: " + jsText);201 return cdp.Tasks{202 cdp.Navigate(urlLink),203 cdp.WaitNotPresent("pageLoading", cdp.ByID),204 cdp.EvaluateAsDevTools("document.querySelector('.results-dog-details .ghName').textContent.trim();", resName),205 cdp.EvaluateAsDevTools("document.querySelector('.results-dog-details .runnerBlock .pedigree tbody tr td strong').innerHTML.trim();", resSireName),206 cdp.EvaluateAsDevTools("document.querySelector('.results-dog-details .runnerBlock .pedigree tbody tr td:last-child strong').innerHTML.trim();", resDamName),207 cdp.Evaluate(jsText, res),208 }209}...

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modal.go

Source:modal.go Github

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...3 . "github.com/siongui/godom"4)5var modal *Object6func SetModalTitle(title string) {7 //modal.QuerySelector(".modal-card-title").SetInnerHTML(title)8 modal.QuerySelector("#modal-title").SetInnerHTML(title)9}10func SetModalBody(b string) {11 modal.QuerySelector(".modal-card-body").SetInnerHTML(b)12}13func openModal() {14 Document.DocumentElement().ClassList().Add("is-clipped")15 modal.ClassList().Add("is-active")16}17func closeModal() {18 Document.DocumentElement().ClassList().Remove("is-clipped")19 modal.ClassList().Remove("is-active")20 //SetModalBody("")21 SetModalWords("")22 SetModalContent("")23 SetInputValue("")24 HideModalInput()25}26func SetModalContent(html string) {27 Document.GetElementById("modal-content").SetInnerHTML(html)28}29func SetModalWords(html string) {30 Document.GetElementById("words").SetInnerHTML(html)31}32func HideModalInput() {33 Document.GetElementById("modal-input-toggle").Set("checked", false)34}35func ShowModalInput() {36 Document.GetElementById("modal-input-toggle").Set("checked", true)37}38func SetupModal() {39 modal = Document.QuerySelector("div.modal")40 var closeElm []*Object41 closeElm = append(closeElm, modal.QuerySelector(".modal-background"))42 //closeElm = append(closeElm, modal.QuerySelector(".modal-close"))43 closeElm = append(closeElm, modal.QuerySelector(".modal-card-head .delete"))44 //closeElm = append(closeElm, modal.QuerySelector(".modal-card-foot .button"))45 for _, elm := range closeElm {46 elm.AddEventListener("click", func(e Event) {47 closeModal()48 })49 }50 Document.AddEventListener("keydown", func(e Event) {51 if e.KeyCode() == 27 {52 // ESC pressed53 closeModal()54 }55 })56}...

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QuerySelector

Using AI Code Generation

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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}

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QuerySelector

Using AI Code Generation

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1import (2func main() {3 for _, url := range os.Args[1:] {4 doc, err := getDoc(url)5 if err != nil {6 log.Fatalf("getDoc: %v", err)7 }8 links, err := links(doc)9 if err != nil {10 log.Fatalf("links: %v", err)11 }12 for _, link := range links {13 fmt.Println(link)14 }15 }16}17func getDoc(url string) (*html.Node, error) {18 resp, err := http.Get(url)19 if err != nil {20 }21 defer resp.Body.Close()22 doc, err := html.Parse(resp.Body)23 if err != nil {24 }25}26func links(n *html.Node) ([]string, error) {27 nodes := ElementByID(n, "links")28 if nodes == nil {29 return nil, fmt.Errorf("no nodes found")30 }31 for _, node := range nodes {32 for _, a := range node.Attr {33 if a.Key == "href" {34 links = append(links, a.Val)35 }36 }37 }38}39func ElementByID(n *html.Node, id string) []*html.Node {40 if n.Type == html.ElementNode {41 for _, a := range n.Attr {42 if a.Key == "id" && a.Val == id {43 nodes = append(nodes, n)44 }45 }46 }47 for c := n.FirstChild; c != nil; c = c.NextSibling {48 nodes = append(nodes, ElementByID(c, id)...)49 }50}51import (52func main() {53 for _, url := range os.Args[1:] {54 doc, err := getDoc(url)55 if err != nil {56 log.Fatalf("getDoc: %v", err)57 }58 links, err := links(doc)59 if err != nil {60 log.Fatalf("links

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QuerySelector

Using AI Code Generation

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1import (2func main() {3 file, err := os.Open("index.html")4 if err != nil {5 log.Fatal(err)6 }7 doc, err := html.Parse(file)8 if err != nil {9 log.Fatal(err)10 }11 m := make(map[string]int)12 visit(m, doc)13 for k, v := range m {14 fmt.Println(k, v)15 }16}17func visit(m map[string]int, n *html.Node) {18 if n.Type == html.ElementNode {19 }20 for c := n.FirstChild; c != nil; c = c.NextSibling {21 visit(m, c)22 }23}24import (25func main() {26 file, err := os.Open("index.html")27 if err != nil {28 log.Fatal(err)29 }30 doc, err := html.Parse(file)31 if err != nil {32 log.Fatal(err)33 }34 m := make(map[string]int)35 visit(m, doc)36 for k, v := range m {37 fmt.Println(k, v)38 }39}40func visit(m map[string]int, n *html.Node) {41 if n.Type == html.ElementNode {42 }43 for c := n.FirstChild; c != nil; c = c.NextSibling {44 visit(m, c)45 }46}47import (48func main() {49 file, err := os.Open("index.html")50 if err != nil {51 log.Fatal(err)52 }53 doc := js.Global().Get("document").Call("querySelector", "body")54 fmt.Println(doc)55}56import (57func main() {58 file, err := os.Open("index.html")59 if err != nil {60 log.Fatal(err)61 }62 doc := js.Global().Get("document").Call("querySelectorAll", "body")

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QuerySelector

Using AI Code Generation

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1import (2func main() {3 for _, url := range os.Args[1:] {4 }5 doc, err := getHTMLDoc(url)6 if err != nil {7 log.Fatal(err)8 }

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QuerySelector

Using AI Code Generation

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1import (2func main() {3 if err != nil {4 log.Fatal(err)5 }6 defer res.Body.Close()7 if res.StatusCode != 200 {8 log.Fatalf("status code error: %d %s", res.StatusCode, res.Status)9 }10 doc, err := goquery.NewDocumentFromReader(res.Body)11 if err != nil {12 log.Fatal(err)13 }14 doc.Find("a").Each(func(index int, item *goquery.Selection) {15 href, _ := linkTag.Attr("href")16 fmt.Println(href)17 })18}

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QuerySelector

Using AI Code Generation

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1import (2func main() {3 if err != nil {4 log.Fatal(err)5 }6 defer res.Body.Close()7 if res.StatusCode != 200 {8 log.Fatalf("status code error: %d %s", res.StatusCode, res.Status)9 }10 doc, err := goquery.NewDocumentFromReader(res.Body)11 if err != nil {12 log.Fatal(err)13 }14 doc.Find("div").Each(func(i int, s *goquery.Selection) {15 band := s.Find("span").Text()16 title := s.Find("a").Text()17 fmt.Printf("Review %d: %s - %s\n", i, band, title)18 })19}20import (21func main() {22 if err != nil {23 log.Fatal(err)24 }25 defer res.Body.Close()

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QuerySelector

Using AI Code Generation

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1import (2func main() {3 resp, err := http.Get(url)4 if err != nil {5 log.Fatal(err)6 }7 defer resp.Body.Close()8 doc, err := html.Parse(resp.Body)9 if err != nil {10 log.Fatal(err)11 }12 node := QuerySelector(doc, "a", func(n *html.Node) bool {13 strings.HasPrefix(GetAttribute(n, "href"), "/doc")14 })15 fmt.Println(node)16}17func GetAttribute(n *html.Node, name string) string {18 for _, a := range n.Attr {19 if a.Key == name {20 }21 }22}23func QuerySelector(n *html.Node, tag string, predicate func(*html.Node) bool) *html.Node {24 if n.Type == html.ElementNode && n.Data == tag && predicate(n) {25 }26 for c := n.FirstChild; c != nil; c = c.NextSibling {27 if node := QuerySelector(c, tag, predicate); node != nil {28 }29 }30}31import (32func main() {33 resp, err := http.Get(url)34 if err != nil {35 log.Fatal(err)36 }37 defer resp.Body.Close()38 doc, err := html.Parse(resp.Body)39 if err != nil {40 log.Fatal(err)41 }42 nodes := QuerySelectorAll(doc, "a", func(n *html.Node

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QuerySelector

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1import (2func main() {3 resp, err := http.Get(url)4 if err != nil {5 log.Fatal(err)6 }7 defer resp.Body.Close()8 doc, err := html.Parse(resp.Body)9 if err != nil {10 log.Fatal(err)11 }12 nodes := ElementByTagName(doc, "a", "img")13 fmt.Println(nodes)14}15func ElementByTagName(doc *html.Node, name ...string) []*html.Node {16 for _, n := range name {17 nodes = append(nodes, visit(nil, doc, n)...)18 }19}20func visit(nodes []*html.Node, n *html.Node, name string) []*html.Node {21 if n.Type == html.ElementNode && n.Data == name {22 nodes = append(nodes, n)23 }24 for c := n.FirstChild; c != nil; c = c.NextSibling {25 nodes = visit(nodes, c, name)26 }27}

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QuerySelector

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

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QuerySelector

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1import (2func main() {3 if err != nil {4 fmt.Println("Error fetching URL. ", err)5 }6 defer res.Body.Close()7 doc, err := html.Parse(res.Body)8 if err != nil {9 fmt.Println("Error parsing HTML. ", err)10 }11 fmt.Println(val.Attr[1].Val)12}

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