Alerting: Fix share URL for Prometheus rules on subpath (#66752)

public/app/features/alerting/unified/RedirectToRuleViewer.tsx

@@ -4,6 +4,7 @@ import { Redirect } from 'react-router-dom';
 import { useLocation } from 'react-use';
 
 import { GrafanaTheme2 } from '@grafana/data';
+import { config } from '@grafana/runtime';
 import { Alert, Card, Icon, LoadingPlaceholder, useStyles2, withErrorBoundary } from '@grafana/ui';
 
 import { AlertLabels } from './components/AlertLabels';
@@ -13,6 +14,7 @@ import { getRulesSourceByName } from './utils/datasource';
 import { createViewLink } from './utils/misc';
 
 const pageTitle = 'Find rule';
+const subUrl = config.appSubUrl;
 
 function useRuleFindParams() {
   // DO NOT USE REACT-ROUTER HOOKS FOR THIS CODE
@@ -22,7 +24,7 @@ function useRuleFindParams() {
   // Relevant issue: https://github.com/remix-run/history/issues/505#issuecomment-453175833
   // It was probably fixed in React-Router v6
   const location = useLocation();
-  const segments = location.pathname?.split('/') ?? []; // ["", "alerting", "{sourceName}", "{name}]
+  const segments = location.pathname?.replace(subUrl, '').split('/') ?? []; // ["", "alerting", "{sourceName}", "{name}]
 
   const name = decodeURIComponent(segments[3]);
   const sourceName = decodeURIComponent(segments[2]);
@@ -76,7 +78,8 @@ export function RedirectToRuleViewer(): JSX.Element | null {
 
   if (rules.length === 1) {
     const [rule] = rules;
-    return <Redirect to={createViewLink(rulesSource, rule, '/alerting/list')} />;
+    const to = createViewLink(rulesSource, rule, '/alerting/list').replace(subUrl, '');
+    return <Redirect to={to} />;
   }
 
   return (

public/app/features/alerting/unified/components/rules/RuleActionsButtons.tsx

@@ -4,7 +4,6 @@ import { useLocation } from 'react-router-dom';
 
 import { GrafanaTheme2 } from '@grafana/data';
 import { Stack } from '@grafana/experimental';
-import { config } from '@grafana/runtime';
 import { Button, ClipboardButton, ConfirmModal, LinkButton, Tooltip, useStyles2 } from '@grafana/ui';
 import { useAppNotification } from 'app/core/copy/appNotification';
 import { useDispatch } from 'app/types';
@@ -12,8 +11,8 @@ import { CombinedRule, RulesSource } from 'app/types/unified-alerting';
 
 import { useIsRuleEditable } from '../../hooks/useIsRuleEditable';
 import { deleteRuleAction } from '../../state/actions';
-import { getRulesSourceName, isCloudRulesSource } from '../../utils/datasource';
-import { createViewLink } from '../../utils/misc';
+import { getRulesSourceName } from '../../utils/datasource';
+import { createShareLink, createViewLink } from '../../utils/misc';
 import * as ruleId from '../../utils/rule-id';
 import { isFederatedRuleGroup, isGrafanaRulerRule } from '../../utils/rules';
 import { createUrl } from '../../utils/url';
@@ -59,16 +58,7 @@ export const RuleActionsButtons = ({ rule, rulesSource }: Props) => {
     }
   };
 
-  const buildShareUrl = () => {
-    if (isCloudRulesSource(rulesSource)) {
-      const { appUrl, appSubUrl } = config;
-      const baseUrl = appSubUrl !== '' ? `${appUrl}${appSubUrl}/` : config.appUrl;
-      const ruleUrl = `${encodeURIComponent(rulesSource.name)}/${encodeURIComponent(rule.name)}`;
-      return `${baseUrl}alerting/${ruleUrl}/find`;
-    }
-
-    return window.location.href.split('?')[0];
-  };
+  const buildShareUrl = () => createShareLink(rulesSource, rule);
 
   const sourceName = getRulesSourceName(rulesSource);
 
@@ -83,7 +73,7 @@ export const RuleActionsButtons = ({ rule, rulesSource }: Props) => {
           variant="secondary"
           icon="eye"
           href={createViewLink(rulesSource, rule, returnTo)}
-        ></LinkButton>
+        />
       </Tooltip>
     );
   }

public/app/features/alerting/unified/components/rules/RuleDetailsActionButtons.tsx

@@ -21,7 +21,7 @@ import { getRulesPermissions } from '../../utils/access-control';
 import { getAlertmanagerByUid } from '../../utils/alertmanager';
 import { Annotation } from '../../utils/constants';
 import { getRulesSourceName, isCloudRulesSource, isGrafanaRulesSource } from '../../utils/datasource';
-import { createExploreLink, makeRuleBasedSilenceLink } from '../../utils/misc';
+import { createExploreLink, createShareLink, makeRuleBasedSilenceLink } from '../../utils/misc';
 import * as ruleId from '../../utils/rule-id';
 import { isAlertingRule, isFederatedRuleGroup, isGrafanaRulerRule } from '../../utils/rules';
 import { DeclareIncident } from '../bridges/DeclareIncidentButton';
@@ -67,16 +67,6 @@ export const RuleDetailsActionButtons = ({ rule, rulesSource, isViewMode }: Prop
       setRuleToDelete(undefined);
     }
   };
-  const buildShareUrl = () => {
-    if (isCloudRulesSource(rulesSource)) {
-      const { appUrl, appSubUrl } = config;
-      const baseUrl = appSubUrl !== '' ? `${appUrl}${appSubUrl}/` : config.appUrl;
-      const ruleUrl = `${encodeURIComponent(rulesSource.name)}/${encodeURIComponent(rule.name)}`;
-      return `${baseUrl}alerting/${ruleUrl}/find`;
-    }
-
-    return window.location.href.split('?')[0];
-  };
 
   const isFederated = isFederatedRuleGroup(group);
   const rulesSourceName = getRulesSourceName(rulesSource);
@@ -89,6 +79,8 @@ export const RuleDetailsActionButtons = ({ rule, rulesSource, isViewMode }: Prop
   const { isEditable, isRemovable } = useIsRuleEditable(rulesSourceName, rulerRule);
   const canSilence = useCanSilence(rule);
 
+  const buildShareUrl = () => createShareLink(rulesSource, rule);
+
   const returnTo = location.pathname + location.search;
   // explore does not support grafana rule queries atm
   // neither do "federated rules"

public/app/features/alerting/unified/utils/misc.ts

@@ -13,10 +13,10 @@ import {
 import { FolderDTO } from '../../../../types';
 
 import { ALERTMANAGER_NAME_QUERY_KEY } from './constants';
-import { getRulesSourceName } from './datasource';
+import { getRulesSourceName, isCloudRulesSource } from './datasource';
 import { getMatcherQueryParams } from './matchers';
 import * as ruleId from './rule-id';
-import { createUrl } from './url';
+import { createAbsoluteUrl, createUrl } from './url';
 
 export function createViewLink(ruleSource: RulesSource, rule: CombinedRule, returnTo: string): string {
   const sourceName = getRulesSourceName(ruleSource);
@@ -50,6 +50,14 @@ export function createMuteTimingLink(muteTimingName: string, alertManagerSourceN
   });
 }
 
+export function createShareLink(ruleSource: RulesSource, rule: CombinedRule): string {
+  if (isCloudRulesSource(ruleSource)) {
+    return createAbsoluteUrl(`/alerting/${encodeURIComponent(ruleSource.name)}/${encodeURIComponent(rule.name)}/find`);
+  }
+
+  return window.location.href.split('?')[0];
+}
+
 export function arrayToRecord(items: Array<{ key: string; value: string }>): Record<string, string> {
   return items.reduce<Record<string, string>>((rec, { key, value }) => {
     rec[key] = value;

public/app/features/alerting/unified/utils/url.ts

@@ -2,5 +2,24 @@ import { config } from '@grafana/runtime';
 
 export function createUrl(path: string, queryParams?: string[][] | Record<string, string> | string | URLSearchParams) {
   const searchParams = new URLSearchParams(queryParams);
-  return `${config.appSubUrl}${path}?${searchParams.toString()}`;
+  const searchParamsString = searchParams.toString();
+
+  return `${config.appSubUrl}${path}${searchParamsString ? `?${searchParamsString}` : ''}`;
+}
+
+export function createAbsoluteUrl(
+  path: string,
+  queryParams?: string[][] | Record<string, string> | string | URLSearchParams
+) {
+  const searchParams = new URLSearchParams(queryParams);
+  const searchParamsString = searchParams.toString();
+
+  try {
+    const baseUrl = new URL(config.appSubUrl, config.appUrl);
+    baseUrl.pathname = path;
+
+    return `${baseUrl.href}${searchParamsString ? `?${searchParamsString}` : ''}`;
+  } catch (err) {
+    return createUrl(path, queryParams);
+  }
 }