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How to use SR_PREFETCH_UTILS_URL method in wpt

Best JavaScript code snippet using wpt

utils.sub.js

1/**2 * Utilities for initiating prefetch via speculation rules.3 */4// Resolved URL to find this script.5const SR_PREFETCH_UTILS_URL = new URL(document.currentScript.src, document.baseURI);6// Hostname for cross origin urls.7const PREFETCH_PROXY_BYPASS_HOST = "{{hosts[alt][]}}";8class PrefetchAgent extends RemoteContext {9  constructor(uuid, t) {10    super(uuid);11    this.t = t;12  }13  getExecutorURL(options = {}) {14    let {hostname, username, password, protocol, executor, ...extra} = options;15    let params = new URLSearchParams({uuid: this.context_id, ...extra});16    if(executor === undefined) {17      executor = "executor.sub.html";18    }19    let url = new URL(`${executor}?${params}`, SR_PREFETCH_UTILS_URL);20    if(hostname !== undefined) {21      url.hostname = hostname;22    }23    if(username !== undefined) {24      url.username = username;25    }26    if(password !== undefined) {27      url.password = password;28    }29    if(protocol !== undefined) {30      url.protocol = protocol;31      url.port = protocol === "https" ? "{{ports[https][0]}}" : "{{ports[http][0]}}";32    }33    return url;34  }35  // Requests prefetch via speculation rules.36  //37  // In the future, this should also use browser hooks to force the prefetch to38  // occur despite heuristic matching, etc., and await the completion of the39  // prefetch.40  async forceSinglePrefetch(url, extra = {}) {41    await this.execute_script((url, extra) => {42      insertSpeculationRules({ prefetch: [{source: 'list', urls: [url], ...extra}] });43    }, [url, extra]);44    return new Promise(resolve => this.t.step_timeout(resolve, 2000));45  }46  async navigate(url) {47    await this.execute_script((url) => {48      window.executor.suspend(() => {49        location.href = url;50      });51    }, [url]);52    url.username = '';53    url.password = '';54    assert_equals(55        await this.execute_script(() => location.href),56        url.toString(),57        "expected navigation to reach destination URL");58    await this.execute_script(() => {});59  }60  async getRequestHeaders() {61    return this.execute_script(() => requestHeaders);62  }63  async getResponseCookies() {64    return this.execute_script(() => {65      let cookie = {};66      document.cookie.split(/\s*;\s*/).forEach((kv)=>{67        let [key, value] = kv.split(/\s*=\s*/);68        cookie[key] = value;69      });70      return cookie;71    });72  }73  async getRequestCookies() {74    return this.execute_script(() => window.requestCookies);75  }76  async getRequestCredentials() {77    return this.execute_script(() => window.requestCredentials);78  }79}80// Produces n URLs with unique UUIDs which will record when they are prefetched.81function getPrefetchUrlList(n) {82  let urls = [];83  for (let i=0; i<n; i++) {84    let params = new URLSearchParams({uuid: token()});85    urls.push(new URL(`prefetch.py?${params}`, SR_PREFETCH_UTILS_URL));86  }87  return urls;88}89function getRedirectUrl() {90  let params = new URLSearchParams({uuid: token()});91  return new URL(`redirect.py?${params}`, SR_PREFETCH_UTILS_URL);92}93async function isUrlPrefetched(url) {94  let response = await fetch(url, {redirect: 'follow'});95  assert_true(response.ok);96  return response.json();97}98// Must also include /common/utils.js and /common/dispatcher/dispatcher.js to use this.99async function spawnWindow(t, options = {}) {100  let agent = new PrefetchAgent(token(), t);101  let w = window.open(agent.getExecutorURL(options), options);102  t.add_cleanup(() => w.close());103  return agent;104}105function insertSpeculationRules(body) {106  let script = document.createElement('script');107  script.type = 'speculationrules';108  script.textContent = JSON.stringify(body);109  document.head.appendChild(script);110}111function assert_prefetched (requestHeaders, description) {112  assert_in_array(requestHeaders.purpose, ["", "prefetch"], "The vendor-specific header Purpose, if present, must be 'prefetch'.");113  assert_equals(requestHeaders.sec_purpose, "prefetch", description);114}115function assert_not_prefetched (requestHeaders, description){116  assert_equals(requestHeaders.purpose, "", description);117  assert_equals(requestHeaders.sec_purpose, "", description);...

Using AI Code Generation

1var url = wptb_utils.SR_PREFETCH_UTILS_URL;2var req = new XMLHttpRequest();3req.open("GET", url, true);4req.onload = function() {5    if (req.readyState == 4 && req.status == 200) {6        var resp = JSON.parse(req.responseText);7        console.log(resp);8    }9};10req.send(null);

Using AI Code Generation

1var callback = function(response) {2};3wptb_prefetch_utils.SR_PREFETCH_UTILS_URL(url, callback);4wptb_prefetch_utils.SR_PREFETCH_UTILS_URL(url);5wptb_prefetch_utils.SR_PREFETCH_UTILS_URL(url, null, "GET");6var headers = {"Content-Type":"application/json"};7wptb_prefetch_utils.SR_PREFETCH_UTILS_URL(url, null, "GET", headers);8var body = {"key":"value"};9wptb_prefetch_utils.SR_PREFETCH_UTILS_URL(url, null, "POST", headers, body);

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