From bee5c12ab7897b01b552be43f23e27d4a989e525 Mon Sep 17 00:00:00 2001
From: vbudko <valerij.budko@gmail.com>
Date: Tue, 6 May 2025 10:25:19 +0100
Subject: [PATCH 1/2] Implement urlFallback

---
 api/search.js | 28 +++++++++++++++++++++-------
 env.config.js |  2 ++
 2 files changed, 23 insertions(+), 7 deletions(-)

diff --git a/api/search.js b/api/search.js
index 229619b9..1aeeeec0 100644
--- a/api/search.js
+++ b/api/search.js
@@ -6,16 +6,31 @@ export const fetchWorks = async (body) => {
   const { t } = body
   const split = t?.split('-')
   const isUndefined = split?.some((item) => item === undefined)
-  const url = new URL(
+
+  const urlPrimary = new URL(
     `/v3/search/works${!isUndefined || t ? `?t=${t}` : ''}`,
     process.env.API_URL
   ).href
-  const { data: dataWorks } = await apiRequest(url, {
-    body,
-    method: 'POST',
-  })
 
-  return dataWorks
+  const urlFallback = new URL(
+    `/v3/search/works${!isUndefined || t ? `?t=${t}` : ''}`,
+    process.env.API_URL_01
+  ).href
+
+  try {
+    const { data: dataWorks } = await apiRequest(urlPrimary, {
+      method: 'POST',
+      body,
+    })
+    return dataWorks
+  } catch (err) {
+    console.warn(`Primary API failed (${urlPrimary}), retrying fallback…`, err)
+    const { data: dataWorks } = await apiRequest(urlFallback, {
+      method: 'POST',
+      body,
+    })
+    return dataWorks
+  }
 }
 
 export const fetchAggregations = async (body) => {
@@ -32,7 +47,6 @@ export const fetchAggregations = async (body) => {
 
 export const downloadResultsInCSV = async (body) => {
   const url = new URL(`/v3/search/works`, process.env.API_URL).href
-
   await apiRequest(url, {
     body,
     method: 'POST',
diff --git a/env.config.js b/env.config.js
index 2f45da02..3260e3e4 100644
--- a/env.config.js
+++ b/env.config.js
@@ -6,10 +6,12 @@ const local = {
 
 const development = {
   API_URL: 'https://api-dev.core.ac.uk/internal',
+  API_URL_01: 'https://api-dev.core.ac.uk/internal',
 }
 
 const production = {
   API_URL: 'https://api.core.ac.uk/internal',
+  API_URL_01: 'https://api01.core.ac.uk/internal',
 }
 
 const validate = (config) =>

From 1e2187a3e26886cce567f2650f0f449476491e42 Mon Sep 17 00:00:00 2001
From: vbudko <valerij.budko@gmail.com>
Date: Tue, 6 May 2025 10:35:39 +0100
Subject: [PATCH 2/2] Implement urlFallback

---
 api/search.js | 39 +++++++++++++++++++++++++++++----------
 1 file changed, 29 insertions(+), 10 deletions(-)

diff --git a/api/search.js b/api/search.js
index 1aeeeec0..174bbf9a 100644
--- a/api/search.js
+++ b/api/search.js
@@ -24,7 +24,8 @@ export const fetchWorks = async (body) => {
     })
     return dataWorks
   } catch (err) {
-    console.warn(`Primary API failed (${urlPrimary}), retrying fallback…`, err)
+    console.warn('Primary API failed')
+    console.error(`Primary API failed (${urlPrimary}), retrying fallback…`, err)
     const { data: dataWorks } = await apiRequest(urlFallback, {
       method: 'POST',
       body,
@@ -34,15 +35,33 @@ export const fetchWorks = async (body) => {
 }
 
 export const fetchAggregations = async (body) => {
-  const url = new URL(`/v3/search/works/aggregate`, process.env.API_URL).href
-  const { data: aggregations } = await apiRequest(url, {
-    body: {
-      ...body,
-      q: body.q || '',
-    },
-    method: 'POST',
-  })
-  return aggregations
+  const urlPrimary = new URL(`/v3/search/works/aggregate`, process.env.API_URL).href
+  const urlFallback = new URL(`/v3/search/works/aggregate`, process.env.API_URL_01).href
+
+  try {
+    const { data: aggregations } = await apiRequest(urlPrimary, {
+      body: {
+        ...body,
+        q: body.q || '',
+      },
+      method: 'POST',
+    })
+    return aggregations
+  } catch (err) {
+    console.warn('Primary API failed')
+    console.error(
+      `Primary API failed (${urlPrimary}), retrying fallback for aggregate …`,
+      err
+    )
+    const { data: aggregations } = await apiRequest(urlFallback, {
+      body: {
+        ...body,
+        q: body.q || '',
+      },
+      method: 'POST',
+    })
+    return aggregations
+  }
 }
 
 export const downloadResultsInCSV = async (body) => {