Fix GQL requests failing under chrome #363

- Ref https://github.com/AdguardTeam/AdGuardExtra/issues/599

vaft/vaft-ublock-origin.js

@@ -1,7 +1,7 @@
 twitch-videoad.js text/javascript
 (function() {
     if ( /(^|\.)twitch\.tv$/.test(document.location.hostname) === false ) { return; }
-    var ourTwitchAdSolutionsVersion = 2;// Only bump this when there's a breaking change to Twitch, the script, or there's a conflict with an unmaintained extension which uses this script
+    var ourTwitchAdSolutionsVersion = 3;// Only bump this when there's a breaking change to Twitch, the script, or there's a conflict with an unmaintained extension which uses this script
     if (window.twitchAdSolutionsVersion && window.twitchAdSolutionsVersion >= ourTwitchAdSolutionsVersion) {
         console.log("skipping vaft as there's another script active. ourVersion:" + ourTwitchAdSolutionsVersion + " activeVersion:" + window.twitchAdSolutionsVersion);
         window.twitchAdSolutionsVersion = ourTwitchAdSolutionsVersion;
@@ -102,6 +102,7 @@ twitch-videoad.js text/javascript
                     return;
                 }
                 var newBlobStr = `
+                    const pendingFetchRequests = new Map();
                     ${getStreamUrlForResolution.toString()}
                     ${getStreamForResolution.toString()}
                     ${stripUnusedParams.toString()}
@@ -131,6 +132,23 @@ twitch-videoad.js text/javascript
                             ClientIntegrityHeader = e.data.value;
                         } else if (e.data.key == 'UpdateAuthorizationHeader') {
                             AuthorizationHeader = e.data.value;
+                        } else if (e.data.key == 'FetchResponse') {
+                            const responseData = e.data.value;
+                            if (pendingFetchRequests.has(responseData.id)) {
+                                const { resolve, reject } = pendingFetchRequests.get(responseData.id);
+                                pendingFetchRequests.delete(responseData.id);
+                                if (responseData.error) {
+                                    reject(new Error(responseData.error));
+                                } else {
+                                    // Create a Response object from the response data
+                                    const response = new Response(responseData.body, {
+                                        status: responseData.status,
+                                        statusText: responseData.statusText,
+                                        headers: responseData.headers
+                                    });
+                                    resolve(response);
+                                }
+                            }
                         }
                     });
                     hookWorkerFetch();
@@ -244,6 +262,16 @@ twitch-videoad.js text/javascript
                         }
                     }
                 });
+                this.addEventListener('message', async event => {
+                    if (event.data.key == 'FetchRequest') {
+                        const fetchRequest = event.data.value;
+                        const responseData = await handleWorkerFetchRequest(fetchRequest);
+                        this.postMessage({
+                            key: 'FetchResponse',
+                            value: responseData
+                        });
+                    }
+                });
                 function getAdBlockDiv() {
                     //To display a notification to the user, that an ad is being blocked.
                     var playerRootDiv = document.querySelector('.video-player');
@@ -655,7 +683,7 @@ twitch-videoad.js text/javascript
             },
         }];
     }
-    function getAccessToken(channelName, playerType, realFetch) {
+    function getAccessToken(channelName, playerType) {
         var body = null;
         var templateQuery = 'query PlaybackAccessToken_Template($login: String!, $isLive: Boolean!, $vodID: ID!, $isVod: Boolean!, $playerType: String!) {  streamPlaybackAccessToken(channelName: $login, params: {platform: "ios", playerBackend: "mediaplayer", playerType: $playerType}) @include(if: $isLive) {    value    signature    __typename  }  videoPlaybackAccessToken(id: $vodID, params: {platform: "ios", playerBackend: "mediaplayer", playerType: $playerType}) @include(if: $isVod) {    value    signature    __typename  }}';
         body = {
@@ -669,14 +697,9 @@ twitch-videoad.js text/javascript
                 'playerType': playerType
             }
         };
-        return gqlRequest(body, realFetch);
+        return gqlRequest(body);
     }
-    function gqlRequest(body, realFetch) {
+    function gqlRequest(body) {
-        if (ClientIntegrityHeader == null) {
-            //console.warn('ClientIntegrityHeader is null');
-            //throw 'ClientIntegrityHeader is null';
-        }
-        var fetchFunc = realFetch ? realFetch : fetch;
         if (!GQLDeviceID) {
             var dcharacters = 'abcdefghijklmnopqrstuvwxyz0123456789';
             var dcharactersLength = dcharacters.length;
@@ -684,10 +707,7 @@ twitch-videoad.js text/javascript
                 GQLDeviceID += dcharacters.charAt(Math.floor(Math.random() * dcharactersLength));
             }
         }
-        return fetchFunc('https://gql.twitch.tv/gql', {
+        var headers = {
-            method: 'POST',
-            body: JSON.stringify(body),
-            headers: {
             'Client-ID': ClientID,
             'Client-Integrity': ClientIntegrityHeader,
             'Device-ID': GQLDeviceID,
@@ -695,7 +715,26 @@ twitch-videoad.js text/javascript
             'Client-Version': ClientVersion,
             'Client-Session-Id': ClientSession,
             'Authorization': AuthorizationHeader
+        };
+        return new Promise((resolve, reject) => {
+            const requestId = Math.random().toString(36).substring(2, 15);
+            const fetchRequest = {
+                id: requestId,
+                url: 'https://gql.twitch.tv/gql',
+                options: {
+                    method: 'POST',
+                    body: JSON.stringify(body),
+                    headers
                 }
+            };
+            pendingFetchRequests.set(requestId, {
+                resolve,
+                reject
+            });
+            postMessage({
+                key: 'FetchRequest',
+                value: fetchRequest
+            });
         });
     }
     function doTwitchPlayerTask(isPausePlay, isCheckQuality, isCorrectBuffer, isAutoQuality, setAutoQuality) {
@@ -805,6 +844,25 @@ twitch-videoad.js text/javascript
             worker.postMessage({key: key, value: value});
         });
     }
+    async function handleWorkerFetchRequest(fetchRequest) {
+        try {
+            const response = await window.fetch(fetchRequest.url, fetchRequest.options);
+            const responseBody = await response.text();
+            const responseObject = {
+                id: fetchRequest.id,
+                status: response.status,
+                statusText: response.statusText,
+                headers: Object.fromEntries(response.headers.entries()),
+                body: responseBody
+            };
+            return responseObject;
+        } catch (error) {
+            return {
+                id: fetchRequest.id,
+                error: error.message
+            };
+        }
+    }
     function hookFetch() {
         var realFetch = window.fetch;
         window.fetch = function(url, init, ...args) {

vaft/vaft.user.js

@@ -1,7 +1,7 @@
 // ==UserScript==
 // @name         TwitchAdSolutions (vaft)
 // @namespace    https://github.com/pixeltris/TwitchAdSolutions
-// @version      17.0.0
+// @version      18.0.0
 // @description  Multiple solutions for blocking Twitch ads (vaft)
 // @updateURL    https://github.com/pixeltris/TwitchAdSolutions/raw/master/vaft/vaft.user.js
 // @downloadURL  https://github.com/pixeltris/TwitchAdSolutions/raw/master/vaft/vaft.user.js
@@ -13,7 +13,7 @@
 // ==/UserScript==
 (function() {
     'use strict';
-    var ourTwitchAdSolutionsVersion = 2;// Only bump this when there's a breaking change to Twitch, the script, or there's a conflict with an unmaintained extension which uses this script
+    var ourTwitchAdSolutionsVersion = 3;// Only bump this when there's a breaking change to Twitch, the script, or there's a conflict with an unmaintained extension which uses this script
     if (window.twitchAdSolutionsVersion && window.twitchAdSolutionsVersion >= ourTwitchAdSolutionsVersion) {
         console.log("skipping vaft as there's another script active. ourVersion:" + ourTwitchAdSolutionsVersion + " activeVersion:" + window.twitchAdSolutionsVersion);
         window.twitchAdSolutionsVersion = ourTwitchAdSolutionsVersion;
@@ -114,6 +114,7 @@
                     return;
                 }
                 var newBlobStr = `
+                    const pendingFetchRequests = new Map();
                     ${getStreamUrlForResolution.toString()}
                     ${getStreamForResolution.toString()}
                     ${stripUnusedParams.toString()}
@@ -143,6 +144,23 @@
                             ClientIntegrityHeader = e.data.value;
                         } else if (e.data.key == 'UpdateAuthorizationHeader') {
                             AuthorizationHeader = e.data.value;
+                        } else if (e.data.key == 'FetchResponse') {
+                            const responseData = e.data.value;
+                            if (pendingFetchRequests.has(responseData.id)) {
+                                const { resolve, reject } = pendingFetchRequests.get(responseData.id);
+                                pendingFetchRequests.delete(responseData.id);
+                                if (responseData.error) {
+                                    reject(new Error(responseData.error));
+                                } else {
+                                    // Create a Response object from the response data
+                                    const response = new Response(responseData.body, {
+                                        status: responseData.status,
+                                        statusText: responseData.statusText,
+                                        headers: responseData.headers
+                                    });
+                                    resolve(response);
+                                }
+                            }
                         }
                     });
                     hookWorkerFetch();
@@ -256,6 +274,16 @@
                         }
                     }
                 });
+                this.addEventListener('message', async event => {
+                    if (event.data.key == 'FetchRequest') {
+                        const fetchRequest = event.data.value;
+                        const responseData = await handleWorkerFetchRequest(fetchRequest);
+                        this.postMessage({
+                            key: 'FetchResponse',
+                            value: responseData
+                        });
+                    }
+                });
                 function getAdBlockDiv() {
                     //To display a notification to the user, that an ad is being blocked.
                     var playerRootDiv = document.querySelector('.video-player');
@@ -667,7 +695,7 @@
             },
         }];
     }
-    function getAccessToken(channelName, playerType, realFetch) {
+    function getAccessToken(channelName, playerType) {
         var body = null;
         var templateQuery = 'query PlaybackAccessToken_Template($login: String!, $isLive: Boolean!, $vodID: ID!, $isVod: Boolean!, $playerType: String!) {  streamPlaybackAccessToken(channelName: $login, params: {platform: "ios", playerBackend: "mediaplayer", playerType: $playerType}) @include(if: $isLive) {    value    signature    __typename  }  videoPlaybackAccessToken(id: $vodID, params: {platform: "ios", playerBackend: "mediaplayer", playerType: $playerType}) @include(if: $isVod) {    value    signature    __typename  }}';
         body = {
@@ -681,14 +709,9 @@
                 'playerType': playerType
             }
         };
-        return gqlRequest(body, realFetch);
+        return gqlRequest(body);
     }
-    function gqlRequest(body, realFetch) {
+    function gqlRequest(body) {
-        if (ClientIntegrityHeader == null) {
-            //console.warn('ClientIntegrityHeader is null');
-            //throw 'ClientIntegrityHeader is null';
-        }
-        var fetchFunc = realFetch ? realFetch : fetch;
         if (!GQLDeviceID) {
             var dcharacters = 'abcdefghijklmnopqrstuvwxyz0123456789';
             var dcharactersLength = dcharacters.length;
@@ -696,10 +719,7 @@
                 GQLDeviceID += dcharacters.charAt(Math.floor(Math.random() * dcharactersLength));
             }
         }
-        return fetchFunc('https://gql.twitch.tv/gql', {
+        var headers = {
-            method: 'POST',
-            body: JSON.stringify(body),
-            headers: {
             'Client-ID': ClientID,
             'Client-Integrity': ClientIntegrityHeader,
             'Device-ID': GQLDeviceID,
@@ -707,7 +727,26 @@
             'Client-Version': ClientVersion,
             'Client-Session-Id': ClientSession,
             'Authorization': AuthorizationHeader
+        };
+        return new Promise((resolve, reject) => {
+            const requestId = Math.random().toString(36).substring(2, 15);
+            const fetchRequest = {
+                id: requestId,
+                url: 'https://gql.twitch.tv/gql',
+                options: {
+                    method: 'POST',
+                    body: JSON.stringify(body),
+                    headers
                 }
+            };
+            pendingFetchRequests.set(requestId, {
+                resolve,
+                reject
+            });
+            postMessage({
+                key: 'FetchRequest',
+                value: fetchRequest
+            });
         });
     }
     function doTwitchPlayerTask(isPausePlay, isCheckQuality, isCorrectBuffer, isAutoQuality, setAutoQuality) {
@@ -817,6 +856,25 @@
             worker.postMessage({key: key, value: value});
         });
     }
+    async function handleWorkerFetchRequest(fetchRequest) {
+        try {
+            const response = await window.fetch(fetchRequest.url, fetchRequest.options);
+            const responseBody = await response.text();
+            const responseObject = {
+                id: fetchRequest.id,
+                status: response.status,
+                statusText: response.statusText,
+                headers: Object.fromEntries(response.headers.entries()),
+                body: responseBody
+            };
+            return responseObject;
+        } catch (error) {
+            return {
+                id: fetchRequest.id,
+                error: error.message
+            };
+        }
+    }
     function hookFetch() {
         var realFetch = window.fetch;
         window.fetch = function(url, init, ...args) {

video-swap-new/video-swap-new-ublock-origin.js

@@ -1,7 +1,7 @@
 twitch-videoad.js text/javascript
 (function() {
     if ( /(^|\.)twitch\.tv$/.test(document.location.hostname) === false ) { return; }
-    var ourTwitchAdSolutionsVersion = 2;// Only bump this when there's a breaking change to Twitch, the script, or there's a conflict with an unmaintained extension which uses this script
+    var ourTwitchAdSolutionsVersion = 3;// Only bump this when there's a breaking change to Twitch, the script, or there's a conflict with an unmaintained extension which uses this script
     if (window.twitchAdSolutionsVersion && window.twitchAdSolutionsVersion >= ourTwitchAdSolutionsVersion) {
         console.log("skipping video-swap-new as there's another script active. ourVersion:" + ourTwitchAdSolutionsVersion + " activeVersion:" + window.twitchAdSolutionsVersion);
         window.twitchAdSolutionsVersion = ourTwitchAdSolutionsVersion;
@@ -101,6 +101,7 @@ twitch-videoad.js text/javascript
                     return;
                 }
                 var newBlobStr = `
+                    const pendingFetchRequests = new Map();
                     ${processM3U8.toString()}
                     ${hookWorkerFetch.toString()}
                     ${declareOptions.toString()}
@@ -120,6 +121,23 @@ twitch-videoad.js text/javascript
                             ClientIntegrityHeader = e.data.value;
                         } else if (e.data.key == 'UpdateAuthorizationHeader') {
                             AuthorizationHeader = e.data.value;
+                        } else if (e.data.key == 'FetchResponse') {
+                            const responseData = e.data.value;
+                            if (pendingFetchRequests.has(responseData.id)) {
+                                const { resolve, reject } = pendingFetchRequests.get(responseData.id);
+                                pendingFetchRequests.delete(responseData.id);
+                                if (responseData.error) {
+                                    reject(new Error(responseData.error));
+                                } else {
+                                    // Create a Response object from the response data
+                                    const response = new Response(responseData.body, {
+                                        status: responseData.status,
+                                        statusText: responseData.statusText,
+                                        headers: responseData.headers
+                                    });
+                                    resolve(response);
+                                }
+                            }
                         }
                     });
                     hookWorkerFetch();
@@ -152,6 +170,16 @@ twitch-videoad.js text/javascript
                         reloadTwitchPlayer(true);
                     }
                 });
+                this.addEventListener('message', async event => {
+                    if (event.data.key == 'FetchRequest') {
+                        const fetchRequest = event.data.value;
+                        const responseData = await handleWorkerFetchRequest(fetchRequest);
+                        this.postMessage({
+                            key: 'FetchResponse',
+                            value: responseData
+                        });
+                    }
+                });
                 function getAdDiv() {
                     var playerRootDiv = document.querySelector('.video-player');
                     var adDiv = null;
@@ -317,7 +345,7 @@ twitch-videoad.js text/javascript
                                 for (var i = 0; i < 2; i++) {
                                     var encodingsUrl = url;
                                     if (i == 1) {
-                                        var accessTokenResponse = await getAccessToken(channelName, OPT_BACKUP_PLAYER_TYPE, OPT_BACKUP_PLATFORM, realFetch);
+                                        var accessTokenResponse = await getAccessToken(channelName, OPT_BACKUP_PLAYER_TYPE, OPT_BACKUP_PLATFORM);
                                         if (accessTokenResponse != null && accessTokenResponse.status === 200) {
                                             var accessToken = await accessTokenResponse.json();
                                             var urlInfo = new URL('https://usher.ttvnw.net/api/channel/hls/' + channelName + '.m3u8' + (new URL(url)).search);
@@ -416,7 +444,7 @@ twitch-videoad.js text/javascript
             },
         }];
     }
-    function getAccessToken(channelName, playerType, platform, realFetch) {
+    function getAccessToken(channelName, playerType, platform) {
         if (!platform) {
             platform = 'web';
         }
@@ -433,23 +461,40 @@ twitch-videoad.js text/javascript
                 'playerType': playerType
             }
         };
-        return gqlRequest(body, realFetch);
+        return gqlRequest(body);
     }
-    function gqlRequest(body, realFetch) {
+    function gqlRequest(body) {
-        if (ClientIntegrityHeader == null) {
+        if (!gql_device_id) {
-            //console.warn('ClientIntegrityHeader is null');
+            const chars = 'abcdefghijklmnopqrstuvwxyz0123456789';
-            //throw 'ClientIntegrityHeader is null';
+            for (let i = 0; i < 32; i += 1) {
+                gql_device_id += chars.charAt(Math.floor(Math.random() * chars.length));
             }
-        var fetchFunc = realFetch ? realFetch : fetch;
+        }
-        return fetchFunc('https://gql.twitch.tv/gql', {
+        var headers = {
-            method: 'POST',
-            body: JSON.stringify(body),
-            headers: {
             'Client-Id': CLIENT_ID,
             'Client-Integrity': ClientIntegrityHeader,
             'X-Device-Id': gql_device_id,
             'Authorization': AuthorizationHeader
+        };
+        return new Promise((resolve, reject) => {
+            const requestId = Math.random().toString(36).substring(2, 15);
+            const fetchRequest = {
+                id: requestId,
+                url: 'https://gql.twitch.tv/gql',
+                options: {
+                    method: 'POST',
+                    body: JSON.stringify(body),
+                    headers
                 }
+            };
+            pendingFetchRequests.set(requestId, {
+                resolve,
+                reject
+            });
+            postMessage({
+                key: 'FetchRequest',
+                value: fetchRequest
+            });
         });
     }
     function parseAttributes(str) {
@@ -528,6 +573,25 @@ twitch-videoad.js text/javascript
             worker.postMessage({key: key, value: value});
         });
     }
+    async function handleWorkerFetchRequest(fetchRequest) {
+        try {
+            const response = await window.fetch(fetchRequest.url, fetchRequest.options);
+            const responseBody = await response.text();
+            const responseObject = {
+                id: fetchRequest.id,
+                status: response.status,
+                statusText: response.statusText,
+                headers: Object.fromEntries(response.headers.entries()),
+                body: responseBody
+            };
+            return responseObject;
+        } catch (error) {
+            return {
+                id: fetchRequest.id,
+                error: error.message
+            };
+        }
+    }
     function hookFetch() {
         var realFetch = window.fetch;
         window.fetch = function(url, init, ...args) {

video-swap-new/video-swap-new.user.js

@@ -1,7 +1,7 @@
 // ==UserScript==
 // @name         TwitchAdSolutions (video-swap-new)
 // @namespace    https://github.com/pixeltris/TwitchAdSolutions
-// @version      1.35
+// @version      1.36
 // @updateURL    https://github.com/pixeltris/TwitchAdSolutions/raw/master/video-swap-new/video-swap-new.user.js
 // @downloadURL  https://github.com/pixeltris/TwitchAdSolutions/raw/master/video-swap-new/video-swap-new.user.js
 // @description  Multiple solutions for blocking Twitch ads (video-swap-new)
@@ -13,7 +13,7 @@
 // ==/UserScript==
 (function() {
     'use strict';
-    var ourTwitchAdSolutionsVersion = 2;// Only bump this when there's a breaking change to Twitch, the script, or there's a conflict with an unmaintained extension which uses this script
+    var ourTwitchAdSolutionsVersion = 3;// Only bump this when there's a breaking change to Twitch, the script, or there's a conflict with an unmaintained extension which uses this script
     if (window.twitchAdSolutionsVersion && window.twitchAdSolutionsVersion >= ourTwitchAdSolutionsVersion) {
         console.log("skipping video-swap-new as there's another script active. ourVersion:" + ourTwitchAdSolutionsVersion + " activeVersion:" + window.twitchAdSolutionsVersion);
         window.twitchAdSolutionsVersion = ourTwitchAdSolutionsVersion;
@@ -113,6 +113,7 @@
                     return;
                 }
                 var newBlobStr = `
+                    const pendingFetchRequests = new Map();
                     ${processM3U8.toString()}
                     ${hookWorkerFetch.toString()}
                     ${declareOptions.toString()}
@@ -132,6 +133,23 @@
                             ClientIntegrityHeader = e.data.value;
                         } else if (e.data.key == 'UpdateAuthorizationHeader') {
                             AuthorizationHeader = e.data.value;
+                        } else if (e.data.key == 'FetchResponse') {
+                            const responseData = e.data.value;
+                            if (pendingFetchRequests.has(responseData.id)) {
+                                const { resolve, reject } = pendingFetchRequests.get(responseData.id);
+                                pendingFetchRequests.delete(responseData.id);
+                                if (responseData.error) {
+                                    reject(new Error(responseData.error));
+                                } else {
+                                    // Create a Response object from the response data
+                                    const response = new Response(responseData.body, {
+                                        status: responseData.status,
+                                        statusText: responseData.statusText,
+                                        headers: responseData.headers
+                                    });
+                                    resolve(response);
+                                }
+                            }
                         }
                     });
                     hookWorkerFetch();
@@ -164,6 +182,16 @@
                         reloadTwitchPlayer(true);
                     }
                 });
+                this.addEventListener('message', async event => {
+                    if (event.data.key == 'FetchRequest') {
+                        const fetchRequest = event.data.value;
+                        const responseData = await handleWorkerFetchRequest(fetchRequest);
+                        this.postMessage({
+                            key: 'FetchResponse',
+                            value: responseData
+                        });
+                    }
+                });
                 function getAdDiv() {
                     var playerRootDiv = document.querySelector('.video-player');
                     var adDiv = null;
@@ -329,7 +357,7 @@
                                 for (var i = 0; i < 2; i++) {
                                     var encodingsUrl = url;
                                     if (i == 1) {
-                                        var accessTokenResponse = await getAccessToken(channelName, OPT_BACKUP_PLAYER_TYPE, OPT_BACKUP_PLATFORM, realFetch);
+                                        var accessTokenResponse = await getAccessToken(channelName, OPT_BACKUP_PLAYER_TYPE, OPT_BACKUP_PLATFORM);
                                         if (accessTokenResponse != null && accessTokenResponse.status === 200) {
                                             var accessToken = await accessTokenResponse.json();
                                             var urlInfo = new URL('https://usher.ttvnw.net/api/channel/hls/' + channelName + '.m3u8' + (new URL(url)).search);
@@ -428,7 +456,7 @@
             },
         }];
     }
-    function getAccessToken(channelName, playerType, platform, realFetch) {
+    function getAccessToken(channelName, playerType, platform) {
         if (!platform) {
             platform = 'web';
         }
@@ -445,23 +473,40 @@
                 'playerType': playerType
             }
         };
-        return gqlRequest(body, realFetch);
+        return gqlRequest(body);
     }
-    function gqlRequest(body, realFetch) {
+    function gqlRequest(body) {
-        if (ClientIntegrityHeader == null) {
+        if (!gql_device_id) {
-            //console.warn('ClientIntegrityHeader is null');
+            const chars = 'abcdefghijklmnopqrstuvwxyz0123456789';
-            //throw 'ClientIntegrityHeader is null';
+            for (let i = 0; i < 32; i += 1) {
+                gql_device_id += chars.charAt(Math.floor(Math.random() * chars.length));
             }
-        var fetchFunc = realFetch ? realFetch : fetch;
+        }
-        return fetchFunc('https://gql.twitch.tv/gql', {
+        var headers = {
-            method: 'POST',
-            body: JSON.stringify(body),
-            headers: {
             'Client-Id': CLIENT_ID,
             'Client-Integrity': ClientIntegrityHeader,
             'X-Device-Id': gql_device_id,
             'Authorization': AuthorizationHeader
+        };
+        return new Promise((resolve, reject) => {
+            const requestId = Math.random().toString(36).substring(2, 15);
+            const fetchRequest = {
+                id: requestId,
+                url: 'https://gql.twitch.tv/gql',
+                options: {
+                    method: 'POST',
+                    body: JSON.stringify(body),
+                    headers
                 }
+            };
+            pendingFetchRequests.set(requestId, {
+                resolve,
+                reject
+            });
+            postMessage({
+                key: 'FetchRequest',
+                value: fetchRequest
+            });
         });
     }
     function parseAttributes(str) {
@@ -540,6 +585,25 @@
             worker.postMessage({key: key, value: value});
         });
     }
+    async function handleWorkerFetchRequest(fetchRequest) {
+        try {
+            const response = await window.fetch(fetchRequest.url, fetchRequest.options);
+            const responseBody = await response.text();
+            const responseObject = {
+                id: fetchRequest.id,
+                status: response.status,
+                statusText: response.statusText,
+                headers: Object.fromEntries(response.headers.entries()),
+                body: responseBody
+            };
+            return responseObject;
+        } catch (error) {
+            return {
+                id: fetchRequest.id,
+                error: error.message
+            };
+        }
+    }
     function hookFetch() {
         var realFetch = window.fetch;
         window.fetch = function(url, init, ...args) {