From 5a37f61816160996109055c9a14838a1a692b054 Mon Sep 17 00:00:00 2001
From: Nazar Leush <n.leush@gmail.com>
Date: Tue, 17 Mar 2026 18:49:12 +0200
Subject: [PATCH 01/10] make async `prepareRequestOptions`

---
 lib/request.js |   3 +-
 lib/utils.js   | 256 +++++++++++++++++++++++++------------------------
 2 files changed, 135 insertions(+), 124 deletions(-)

diff --git a/lib/request.js b/lib/request.js
index 15b4f40c8..d7448b2d4 100644
--- a/lib/request.js
+++ b/lib/request.js
@@ -162,7 +162,8 @@ export default function(options, iframely_options, callback) {
             url: options.uri
         });
 
-        fetchData(utils.prepareRequestOptions(options, iframely_options))
+        utils.prepareRequestOptions(options, iframely_options)
+            .then(request_options => fetchData(request_options))
             .then(result => {
                 finish(null, result);
             })
diff --git a/lib/utils.js b/lib/utils.js
index 418d98624..0e4a78f86 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -82,99 +82,104 @@ export function getMaxCacheTTL(url, options, default_min_ttl) {
 };
 
 export function prepareRequestOptions(request_options, options) {
+    return new Promise((resolve, reject) => {
+        try {
+            if (request_options.url && !request_options.uri) {
+                request_options.uri = request_options.url;
+            }
+            var uri = request_options.uri;
+            delete request_options.url;
 
-    if (request_options.url && !request_options.uri) {
-        request_options.uri = request_options.url;
-    }
-    var uri = request_options.uri;
-    delete request_options.url;
+            var disable_language = false;
 
-    var disable_language = false;
+            function setPrerender(prerender_option) {
+                if (options?.allowPrerender && CONFIG.PRERENDER_URL) {
+                    request_options.uri = CONFIG.PRERENDER_URL + encodeURIComponent(uri);
+            
+                    // Use string `proxy.prerender` as additional prerender param.
+                    if (typeof prerender_option === 'string') {
+                        request_options.uri += (request_options.uri.indexOf('?') > -1 ? '&' : '?' ) + `prerender=${prerender_option}`;
+                    }
+                }
+            }
 
-    function setPrerender(prerender_option) {
-        if (options?.allowPrerender && CONFIG.PRERENDER_URL) {
-            request_options.uri = CONFIG.PRERENDER_URL + encodeURIComponent(uri);
-    
-            // Use string `proxy.prerender` as additional prerender param.
-            if (typeof prerender_option === 'string') {
-                request_options.uri += (request_options.uri.indexOf('?') > -1 ? '&' : '?' ) + `prerender=${prerender_option}`;
+            var enable_domain_prerender = options?.getDomainOptions && options.getDomainOptions('meta.prerender');
+            if (enable_domain_prerender) {
+                setPrerender(enable_domain_prerender);
             }
-        }
-    }
 
-    var enable_domain_prerender = options?.getDomainOptions && options.getDomainOptions('meta.prerender');
-    if (enable_domain_prerender) {
-        setPrerender(enable_domain_prerender);
-    }
+            if (CONFIG.PROXY || (options && options.proxy)) {
 
-    if (CONFIG.PROXY || (options && options.proxy)) {
+                var proxy = (options && options.proxy) || getCustomProxyForUri(uri, options);
+                if (proxy) {
+                    if (!enable_domain_prerender && proxy.prerender && options?.allowPrerender) {
+                        setPrerender(proxy.prerender);
 
-        var proxy = (options && options.proxy) || getCustomProxyForUri(uri, options);
-        if (proxy) {
-            if (!enable_domain_prerender && proxy.prerender && options?.allowPrerender) {
-                setPrerender(proxy.prerender);
-
-            } else if (proxy.proxy && CONFIG.PROXY_URL) {
-                request_options.uri = /{url}/.test(CONFIG.PROXY_URL) 
-                    ? CONFIG.PROXY_URL.replace(/{url}/, encodeURIComponent(uri))
-                    : CONFIG.PROXY_URL + encodeURIComponent(uri);
-            } else if (proxy.proxy_url && /{url}/.test(proxy.proxy_url)) {
-                request_options.uri = proxy.proxy_url.replace(/{url}/, encodeURIComponent(uri));
-            }
-            if (proxy.user_agent) {
-                request_options.headers = request_options.headers || {};
-                request_options.headers['User-Agent'] = proxy.user_agent;
-            }
-            if (proxy.headers) {
-                request_options.headers = request_options.headers || {};
-                Object.assign(request_options.headers, proxy.headers)
-            }
-            if (proxy.request_options) {
-                Object.assign(request_options, proxy.request_options);
-            }
-            if (proxy.disable_http2) {
-                request_options.disable_http2 = true;
-            }
-            if (proxy.disable_language) {
-                disable_language = true;
-            }
-            if (options && proxy.maxredirects && (!options.redirectsHistory || options.redirectsHistory.length === 0)) {
-                options.maxRedirects = proxy.maxredirects;
-            }
-            if (proxy && proxy.timeout > 0) {
-                request_options.timeout = proxy.timeout > 100 ? proxy.timeout : proxy.timeout * 1000;
+                    } else if (proxy.proxy && CONFIG.PROXY_URL) {
+                        request_options.uri = /{url}/.test(CONFIG.PROXY_URL) 
+                            ? CONFIG.PROXY_URL.replace(/{url}/, encodeURIComponent(uri))
+                            : CONFIG.PROXY_URL + encodeURIComponent(uri);
+                    } else if (proxy.proxy_url && /{url}/.test(proxy.proxy_url)) {
+                        request_options.uri = proxy.proxy_url.replace(/{url}/, encodeURIComponent(uri));
+                    }
+                    if (proxy.user_agent) {
+                        request_options.headers = request_options.headers || {};
+                        request_options.headers['User-Agent'] = proxy.user_agent;
+                    }
+                    if (proxy.headers) {
+                        request_options.headers = request_options.headers || {};
+                        Object.assign(request_options.headers, proxy.headers)
+                    }
+                    if (proxy.request_options) {
+                        Object.assign(request_options, proxy.request_options);
+                    }
+                    if (proxy.disable_http2) {
+                        request_options.disable_http2 = true;
+                    }
+                    if (proxy.disable_language) {
+                        disable_language = true;
+                    }
+                    if (options && proxy.maxredirects && (!options.redirectsHistory || options.redirectsHistory.length === 0)) {
+                        options.maxRedirects = proxy.maxredirects;
+                    }
+                    if (proxy && proxy.timeout > 0) {
+                        request_options.timeout = proxy.timeout > 100 ? proxy.timeout : proxy.timeout * 1000;
+                    }
+                }
             }
-        }
-    }
 
-    if (options && options.getProviderOptions 
-        && (options.getProviderOptions('app.name') || options.getProviderOptions('app.ua_extension'))
-        && request_options.headers
-        && request_options.headers['User-Agent'] === CONFIG.USER_AGENT) {
-
-        var ext = options.getProviderOptions('app.ua_extension', options.getProviderOptions('app.name'));
-        if ( /^[a-zA-Z0-9\.\s_-]+$/.test(ext) && ext.length > 1) {
-            ext =  ext[0].toUpperCase() + ext.slice(1)
-            request_options.headers['User-Agent'] += ' ' + ext;
-        }        
-    } 
-
-    var lang = options?.getProviderOptions && options.getProviderOptions('locale') || '';
-    if (!disable_language) {
-        request_options.headers = request_options.headers || {};
-        request_options.headers['Accept-Language'] = 
-            lang /* !== '' */
-                ? lang.replace('_', '-') 
-                    + (/\-/.test(lang) ? `,${lang.replace(/\-.*$/, '')};q=0.9` : '')
-                    + ',en;q=0.7,*;q=0.5'
-                : 'en,*';
-    }
+            if (options && options.getProviderOptions 
+                && (options.getProviderOptions('app.name') || options.getProviderOptions('app.ua_extension'))
+                && request_options.headers
+                && request_options.headers['User-Agent'] === CONFIG.USER_AGENT) {
+
+                var ext = options.getProviderOptions('app.ua_extension', options.getProviderOptions('app.name'));
+                if ( /^[a-zA-Z0-9\.\s_-]+$/.test(ext) && ext.length > 1) {
+                    ext =  ext[0].toUpperCase() + ext.slice(1)
+                    request_options.headers['User-Agent'] += ' ' + ext;
+                }        
+            } 
 
-    prepareEncodedUri(request_options, 'uri');
+            var lang = options?.getProviderOptions && options.getProviderOptions('locale') || '';
+            if (!disable_language) {
+                request_options.headers = request_options.headers || {};
+                request_options.headers['Accept-Language'] = 
+                    lang /* !== '' */
+                        ? lang.replace('_', '-') 
+                            + (/\-/.test(lang) ? `,${lang.replace(/\-.*$/, '')};q=0.9` : '')
+                            + ',en;q=0.7,*;q=0.5'
+                        : 'en,*';
+            }
 
-    setCookieFromJar(uri, request_options.headers, options?.jar)
+            prepareEncodedUri(request_options, 'uri');
 
-    return request_options;
+            setCookieFromJar(uri, request_options.headers, options?.jar)
+                
+            resolve(request_options);
+        } catch(ex) {
+            reject(ex);
+        }
+    });
 };
 
 /**
@@ -207,21 +212,24 @@ export function prepareRequestOptions(request_options, options) {
         follow = 0;
     }
 
-    var request_options = prepareRequestOptions({
-        // Reviewed.
-        uri: url,
-        method: 'GET',
-        headers: {
-            'User-Agent': options.user_agent || CONFIG.USER_AGENT,
-            'Accept': '*/*'
-        },
-        timeout: options.timeout || CONFIG.RESPONSE_TIMEOUT,
-        redirect: redirect,
-        follow: follow
-    }, options);
-
     try {
-        fetchStreamKeepAlive(request_options)
+        var request_options;
+        prepareRequestOptions({
+            // Reviewed.
+            uri: url,
+            method: 'GET',
+            headers: {
+                'User-Agent': options.user_agent || CONFIG.USER_AGENT,
+                'Accept': '*/*'
+            },
+            timeout: options.timeout || CONFIG.RESPONSE_TIMEOUT,
+            redirect: redirect,
+            follow: follow
+        }, options)
+            .then(_request_options => {
+                request_options = _request_options;
+                return fetchStreamKeepAlive(request_options)
+            })
             .then(stream => {
 
                 // Custom inner redirect logic with cookies.
@@ -281,23 +289,26 @@ var getHead = function(url, options, callbacks) {
         follow = 0;
     }
     
-    var request_options = prepareRequestOptions({
-        // jar: jar,
-
-        // Reviewed.
-        uri: url,
-        method: 'HEAD',
-        headers: {
-            'User-Agent': CONFIG.USER_AGENT
-        },
-        timeout: options.timeout || CONFIG.RESPONSE_TIMEOUT,
-        redirect: redirect,
-        follow: follow
-        // No abort controller for head.
-    }, options);
-
     try {
-        fetchStreamAuthorized(request_options)
+        var request_options;
+        prepareRequestOptions({
+            // jar: jar,
+
+            // Reviewed.
+            uri: url,
+            method: 'HEAD',
+            headers: {
+                'User-Agent': CONFIG.USER_AGENT
+            },
+            timeout: options.timeout || CONFIG.RESPONSE_TIMEOUT,
+            redirect: redirect,
+            follow: follow
+            // No abort controller for head.
+        }, options)
+            .then(_request_options => {
+                request_options = _request_options;
+                return fetchStreamAuthorized(request_options);
+            })
             .then(response => {
                 callbacks.onResponse && callbacks.onResponse(response, request_options);
             })
@@ -1237,19 +1248,18 @@ export function generateLinksHtml(data, options) {
 
 var getUriStatusPrivate = function(uri, options, cb) {
 
-    var request_options = prepareRequestOptions({
-        // Reviewed.
-        uri: uri,
-        method: 'GET',
-        headers: {
-            'User-Agent': CONFIG.USER_AGENT
-        },
-        timeout: options.timeout || CONFIG.RESPONSE_TIMEOUT,
-        follow: CONFIG.MAX_REDIRECTS
-    });
-
     try {
-        fetchStream(request_options)
+        prepareRequestOptions({
+            // Reviewed.
+            uri: uri,
+            method: 'GET',
+            headers: {
+                'User-Agent': CONFIG.USER_AGENT
+            },
+            timeout: options.timeout || CONFIG.RESPONSE_TIMEOUT,
+            follow: CONFIG.MAX_REDIRECTS
+        })
+            .then(request_options => fetchStream(request_options))
             .then(res => {
                 // TODO: may cause AbortError before cb.
                 res.abortController.abort();

From d3d7880a9886605b46c5f20b4497f5eea0f29130 Mon Sep 17 00:00:00 2001
From: Nazar Leush <n.leush@gmail.com>
Date: Tue, 17 Mar 2026 19:10:03 +0200
Subject: [PATCH 02/10] get custom request headers with `options.getSigHeaders`

---
 lib/utils.js | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/lib/utils.js b/lib/utils.js
index 0e4a78f86..32826a37d 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -88,9 +88,11 @@ export function prepareRequestOptions(request_options, options) {
                 request_options.uri = request_options.url;
             }
             var uri = request_options.uri;
+            var original_uri = uri;
             delete request_options.url;
 
             var disable_language = false;
+            var request_sig = false;
 
             function setPrerender(prerender_option) {
                 if (options?.allowPrerender && CONFIG.PRERENDER_URL) {
@@ -145,6 +147,9 @@ export function prepareRequestOptions(request_options, options) {
                     if (proxy && proxy.timeout > 0) {
                         request_options.timeout = proxy.timeout > 100 ? proxy.timeout : proxy.timeout * 1000;
                     }
+                    if (proxy.sig && options.getSigHeaders) {
+                        request_sig = true;
+                    }
                 }
             }
 
@@ -174,8 +179,22 @@ export function prepareRequestOptions(request_options, options) {
             prepareEncodedUri(request_options, 'uri');
 
             setCookieFromJar(uri, request_options.headers, options?.jar)
+
+            if (request_sig) {
+                options.getSigHeaders(original_uri, function(error, headers) {
+                    if (error) {
+                        // Skip error.
+                        resolve(request_options);
+                    } else {
+                        request_options.headers = request_options.headers || {};
+                        Object.assign(request_options.headers, headers)
+                        resolve(request_options);
+                    }
+                });
+            } else {
+                resolve(request_options);
+            }
                 
-            resolve(request_options);
         } catch(ex) {
             reject(ex);
         }

From 20c32e0570b0df8eada8b5f368f7502931849cef Mon Sep 17 00:00:00 2001
From: Nazar Leush <n.leush@gmail.com>
Date: Tue, 17 Mar 2026 19:15:57 +0200
Subject: [PATCH 03/10] request custom headers when `options.sig`

---
 lib/utils.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/utils.js b/lib/utils.js
index 32826a37d..d859cdd09 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -147,7 +147,7 @@ export function prepareRequestOptions(request_options, options) {
                     if (proxy && proxy.timeout > 0) {
                         request_options.timeout = proxy.timeout > 100 ? proxy.timeout : proxy.timeout * 1000;
                     }
-                    if (proxy.sig && options.getSigHeaders) {
+                    if (proxy.sig) {
                         request_sig = true;
                     }
                 }
@@ -180,7 +180,7 @@ export function prepareRequestOptions(request_options, options) {
 
             setCookieFromJar(uri, request_options.headers, options?.jar)
 
-            if (request_sig) {
+            if ((options.sig || request_sig) && options.getSigHeaders) {
                 options.getSigHeaders(original_uri, function(error, headers) {
                     if (error) {
                         // Skip error.

From 8c808beab5ccfb43041d5f8bfba782a514114e0c Mon Sep 17 00:00:00 2001
From: Nazar Leush <n.leush@gmail.com>
Date: Tue, 17 Mar 2026 19:21:12 +0200
Subject: [PATCH 04/10] catch error in `getSigHeaders`

---
 lib/utils.js | 25 +++++++++++++++----------
 1 file changed, 15 insertions(+), 10 deletions(-)

diff --git a/lib/utils.js b/lib/utils.js
index d859cdd09..3137dc9d8 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -181,16 +181,21 @@ export function prepareRequestOptions(request_options, options) {
             setCookieFromJar(uri, request_options.headers, options?.jar)
 
             if ((options.sig || request_sig) && options.getSigHeaders) {
-                options.getSigHeaders(original_uri, function(error, headers) {
-                    if (error) {
-                        // Skip error.
-                        resolve(request_options);
-                    } else {
-                        request_options.headers = request_options.headers || {};
-                        Object.assign(request_options.headers, headers)
-                        resolve(request_options);
-                    }
-                });
+                try {
+                    options.getSigHeaders(original_uri, function(error, headers) {
+                        if (error) {
+                            // Skip error.
+                            resolve(request_options);
+                        } else {
+                            request_options.headers = request_options.headers || {};
+                            Object.assign(request_options.headers, headers);
+                            resolve(request_options);
+                        }
+                    });
+                } catch(ex) {
+                    console.error('options.getSigHeaders exception', ex);
+                    resolve(request_options);    
+                }
             } else {
                 resolve(request_options);
             }

From ef295269b0c07bcd981fe718be39b1476ba7eb64 Mon Sep 17 00:00:00 2001
From: Nazar Leush <n.leush@gmail.com>
Date: Wed, 18 Mar 2026 21:26:16 +0200
Subject: [PATCH 05/10] log getSigHeaders error

---
 lib/utils.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/utils.js b/lib/utils.js
index 3137dc9d8..5ca62405c 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -185,6 +185,7 @@ export function prepareRequestOptions(request_options, options) {
                     options.getSigHeaders(original_uri, function(error, headers) {
                         if (error) {
                             // Skip error.
+                            console.error('getSigHeaders error', error);
                             resolve(request_options);
                         } else {
                             request_options.headers = request_options.headers || {};

From efc0b6486fb1d85d8128696ca6283ab89b2c55a1 Mon Sep 17 00:00:00 2001
From: Nazar Leush <n.leush@gmail.com>
Date: Wed, 25 Mar 2026 16:39:42 +0200
Subject: [PATCH 06/10] update user agent workaround

---
 lib/request.js |  5 -----
 lib/utils.js   | 20 ++++++++------------
 2 files changed, 8 insertions(+), 17 deletions(-)

diff --git a/lib/request.js b/lib/request.js
index d7448b2d4..97634efa4 100644
--- a/lib/request.js
+++ b/lib/request.js
@@ -152,11 +152,6 @@ export default function(options, iframely_options, callback) {
             });
         }
 
-        if (!options.headers || !options.headers['User-Agent']) {
-            options.headers = options.headers || {};
-            options.headers['User-Agent'] = CONFIG.USER_AGENT;
-        }
-
         iframely_options.registerFetch({
             source: 'api',
             url: options.uri
diff --git a/lib/utils.js b/lib/utils.js
index 5ca62405c..e300a1ef6 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -110,6 +110,9 @@ export function prepareRequestOptions(request_options, options) {
                 setPrerender(enable_domain_prerender);
             }
 
+            request_options.headers = request_options.headers || {};
+            request_options.headers['User-Agent'] = options.user_agent || CONFIG.USER_AGENT;
+
             if (CONFIG.PROXY || (options && options.proxy)) {
 
                 var proxy = (options && options.proxy) || getCustomProxyForUri(uri, options);
@@ -125,7 +128,6 @@ export function prepareRequestOptions(request_options, options) {
                         request_options.uri = proxy.proxy_url.replace(/{url}/, encodeURIComponent(uri));
                     }
                     if (proxy.user_agent) {
-                        request_options.headers = request_options.headers || {};
                         request_options.headers['User-Agent'] = proxy.user_agent;
                     }
                     if (proxy.headers) {
@@ -153,17 +155,18 @@ export function prepareRequestOptions(request_options, options) {
                 }
             }
 
-            if (options && options.getProviderOptions 
+            // Add user agent extension to default agent if avaliable.
+            if (options?.getProviderOptions 
                 && (options.getProviderOptions('app.name') || options.getProviderOptions('app.ua_extension'))
                 && request_options.headers
                 && request_options.headers['User-Agent'] === CONFIG.USER_AGENT) {
 
                 var ext = options.getProviderOptions('app.ua_extension', options.getProviderOptions('app.name'));
-                if ( /^[a-zA-Z0-9\.\s_-]+$/.test(ext) && ext.length > 1) {
+                if (/^[a-zA-Z0-9\.\s_-]+$/.test(ext) && ext.length > 1) {
                     ext =  ext[0].toUpperCase() + ext.slice(1)
                     request_options.headers['User-Agent'] += ' ' + ext;
-                }        
-            } 
+                }
+            }
 
             var lang = options?.getProviderOptions && options.getProviderOptions('locale') || '';
             if (!disable_language) {
@@ -244,7 +247,6 @@ export function prepareRequestOptions(request_options, options) {
             uri: url,
             method: 'GET',
             headers: {
-                'User-Agent': options.user_agent || CONFIG.USER_AGENT,
                 'Accept': '*/*'
             },
             timeout: options.timeout || CONFIG.RESPONSE_TIMEOUT,
@@ -322,9 +324,6 @@ var getHead = function(url, options, callbacks) {
             // Reviewed.
             uri: url,
             method: 'HEAD',
-            headers: {
-                'User-Agent': CONFIG.USER_AGENT
-            },
             timeout: options.timeout || CONFIG.RESPONSE_TIMEOUT,
             redirect: redirect,
             follow: follow
@@ -1278,9 +1277,6 @@ var getUriStatusPrivate = function(uri, options, cb) {
             // Reviewed.
             uri: uri,
             method: 'GET',
-            headers: {
-                'User-Agent': CONFIG.USER_AGENT
-            },
             timeout: options.timeout || CONFIG.RESPONSE_TIMEOUT,
             follow: CONFIG.MAX_REDIRECTS
         })

From f5189bf99c6752a5f747346dc00a362dab13f2c2 Mon Sep 17 00:00:00 2001
From: Nazar Leush <n.leush@gmail.com>
Date: Wed, 25 Mar 2026 21:22:09 +0200
Subject: [PATCH 07/10] tests: allow use getSigHeaders

---
 lib/utils.js               |  1 +
 modules/tests-ui/tester.js | 25 ++++++++++++++++++++++++-
 2 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/lib/utils.js b/lib/utils.js
index e300a1ef6..740829897 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -193,6 +193,7 @@ export function prepareRequestOptions(request_options, options) {
                         } else {
                             request_options.headers = request_options.headers || {};
                             Object.assign(request_options.headers, headers);
+                            console.log('--- debug used headers', request_options.headers);
                             resolve(request_options);
                         }
                     });
diff --git a/modules/tests-ui/tester.js b/modules/tests-ui/tester.js
index fd85e264f..72b888493 100644
--- a/modules/tests-ui/tester.js
+++ b/modules/tests-ui/tester.js
@@ -16,6 +16,8 @@ import { run as iframely } from '../../lib/core.js';
 import * as whitelist from '../../lib/whitelist.js';
 import * as pluginLoader from '../../lib/loader/pluginLoader.js';
 import { difference } from '../../utils.js';
+import { fetchData } from '../../lib/fetch.js';
+
 var plugins = pluginLoader._plugins;
 
 var testOnePlugin = false;
@@ -60,6 +62,26 @@ function cerror() {
     }
 }
 
+function getSigHeaders(url, cb) {
+    const sigUrl = new URL(CONFIG.SIG_API);
+    sigUrl.searchParams.append('url', url);
+    fetchData({
+        uri: sigUrl,
+        json: true
+    })
+    .then(result => {
+        console.log('-- got sig headers ', result)
+        cb(null, result);
+    })
+    .catch(cb);;
+}
+
+function getSigHeadersFunction() {
+    if (CONFIG.SIG_API) {
+        return getSigHeaders;
+    }
+}
+
 function updateObsoletePluginTests(providersIds, cb) {
     PluginTest.updateMany({
         _id: {
@@ -540,7 +562,8 @@ function processPluginTests(pluginTest, plugin, count, cb) {
                         refresh: true,
                         readability: true,
                         disableHttp2: disableHttp2,
-                        getWhitelistRecord: whitelist.findWhitelistRecordFor
+                        getWhitelistRecord: whitelist.findWhitelistRecordFor,
+                        getSigHeaders: getSigHeadersFunction()
                     }, callback);
                 }, CONFIG.tests.pause_between_tests || 0);
             }

From e6dfc31c879b9c50a2c1b850efdc6e649c661c16 Mon Sep 17 00:00:00 2001
From: Nazar Leush <n.leush@gmail.com>
Date: Wed, 25 Mar 2026 21:37:18 +0200
Subject: [PATCH 08/10] use getSigHeaders

---
 modules/tests-ui/tester.js | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/modules/tests-ui/tester.js b/modules/tests-ui/tester.js
index 72b888493..89f479008 100644
--- a/modules/tests-ui/tester.js
+++ b/modules/tests-ui/tester.js
@@ -70,8 +70,8 @@ function getSigHeaders(url, cb) {
         json: true
     })
     .then(result => {
-        console.log('-- got sig headers ', result)
-        cb(null, result);
+        console.log('-- got sig headers ', result.data)
+        cb(null, result.data);
     })
     .catch(cb);;
 }
@@ -563,7 +563,8 @@ function processPluginTests(pluginTest, plugin, count, cb) {
                         readability: true,
                         disableHttp2: disableHttp2,
                         getWhitelistRecord: whitelist.findWhitelistRecordFor,
-                        getSigHeaders: getSigHeadersFunction()
+                        getSigHeaders: getSigHeadersFunction(),
+                        sig: !!CONFIG.SIG_API
                     }, callback);
                 }, CONFIG.tests.pause_between_tests || 0);
             }

From 7710f78f093c6ec44db66a2d12effd769afa4501 Mon Sep 17 00:00:00 2001
From: Nazar Leush <n.leush@gmail.com>
Date: Wed, 25 Mar 2026 22:05:12 +0200
Subject: [PATCH 09/10] debugger: use `getSigHeaders`

---
 modules/api/utils.js       | 24 +++++++++++++++++++++++-
 modules/api/views.js       |  4 +++-
 modules/tests-ui/tester.js | 22 +---------------------
 3 files changed, 27 insertions(+), 23 deletions(-)

diff --git a/modules/api/utils.js b/modules/api/utils.js
index e80324508..8415e90d2 100644
--- a/modules/api/utils.js
+++ b/modules/api/utils.js
@@ -1,3 +1,5 @@
+import { fetchData } from "../../lib/fetch";
+
 var _RE = /^_.+/;
 
 export function getProviderOptionsQuery(query) {
@@ -54,4 +56,24 @@ export function getProviderOptionsFromQuery(query) {
     }
 
     return providerOptions;
-}
\ No newline at end of file
+}
+
+function getSigHeaders(url, cb) {
+    const sigUrl = new URL(CONFIG.SIG_API);
+    sigUrl.searchParams.append('url', url);
+    fetchData({
+        uri: sigUrl,
+        json: true
+    })
+    .then(result => {
+        console.log('-- got sig headers ', result.data)
+        cb(null, result.data);
+    })
+    .catch(cb);;
+}
+
+export function getSigHeadersFunction() {
+    if (CONFIG.SIG_API) {
+        return getSigHeaders;
+    }
+}
diff --git a/modules/api/views.js b/modules/api/views.js
index b04c51632..421ab7d85 100644
--- a/modules/api/views.js
+++ b/modules/api/views.js
@@ -144,7 +144,9 @@ export default function(app) {
                     maxWidth: getIntParam(req, 'maxwidth') || getIntParam(req, 'max-width'),
                     promoUri: req.query.promoUri,
                     refresh: getBooleanParam(req, 'refresh'),
-                    providerOptions: getProviderOptionsFromQuery(req.query)
+                    providerOptions: getProviderOptionsFromQuery(req.query),
+                    getSigHeaders: apiUtils.getSigHeadersFunction(),
+                    sig: !!CONFIG.SIG_API
                 }, cb);
             }
 
diff --git a/modules/tests-ui/tester.js b/modules/tests-ui/tester.js
index 89f479008..fae56f129 100644
--- a/modules/tests-ui/tester.js
+++ b/modules/tests-ui/tester.js
@@ -16,7 +16,7 @@ import { run as iframely } from '../../lib/core.js';
 import * as whitelist from '../../lib/whitelist.js';
 import * as pluginLoader from '../../lib/loader/pluginLoader.js';
 import { difference } from '../../utils.js';
-import { fetchData } from '../../lib/fetch.js';
+import { getSigHeadersFunction } from '../api/utils.js';
 
 var plugins = pluginLoader._plugins;
 
@@ -62,26 +62,6 @@ function cerror() {
     }
 }
 
-function getSigHeaders(url, cb) {
-    const sigUrl = new URL(CONFIG.SIG_API);
-    sigUrl.searchParams.append('url', url);
-    fetchData({
-        uri: sigUrl,
-        json: true
-    })
-    .then(result => {
-        console.log('-- got sig headers ', result.data)
-        cb(null, result.data);
-    })
-    .catch(cb);;
-}
-
-function getSigHeadersFunction() {
-    if (CONFIG.SIG_API) {
-        return getSigHeaders;
-    }
-}
-
 function updateObsoletePluginTests(providersIds, cb) {
     PluginTest.updateMany({
         _id: {

From fa530a2302c4ce5abff392acbe3ecea19ead9008 Mon Sep 17 00:00:00 2001
From: Nazar Leush <n.leush@gmail.com>
Date: Wed, 25 Mar 2026 22:08:19 +0200
Subject: [PATCH 10/10] bugfix import

---
 modules/api/utils.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/modules/api/utils.js b/modules/api/utils.js
index 8415e90d2..db4d7ce55 100644
--- a/modules/api/utils.js
+++ b/modules/api/utils.js
@@ -1,4 +1,4 @@
-import { fetchData } from "../../lib/fetch";
+import { fetchData } from "../../lib/fetch.js";
 
 var _RE = /^_.+/;