Due to the old version of http, the Algolia package can't be added to Flutter projects that have http updates. So, I updated all dependencies.

lib/src/algolia.dart

@@ -1,4 +1,4 @@
-part of algolia;
+part of '../algolia.dart';
 
 enum ApiRequestType {
   get,

lib/src/batch.dart

@@ -1,4 +1,4 @@
-part of algolia;
+part of '../algolia.dart';
 
 /// **AlgoliaBatch**
 /// A [AlgoliaBatch] is a series of write operations to be performed as one unit.

lib/src/error.dart

@@ -1,4 +1,4 @@
-part of algolia;
+part of '../algolia.dart';
 
 class AlgoliaError {
   final Map _message;

lib/src/event_snapshot.dart

@@ -1,4 +1,4 @@
-part of algolia;
+part of '../algolia.dart';
 
 enum AlgoliaEventType {
   click,

lib/src/facet_value_snapshot.dart

@@ -1,4 +1,4 @@
-part of algolia;
+part of '../algolia.dart';
 
 class AlgoliaFacetValueSnapshot {
   final Algolia algolia;

lib/src/index_reference.dart

@@ -1,4 +1,4 @@
-part of algolia;
+part of '../algolia.dart';
 
 /// Scopes of the data to copy when copying an index.
 /// When copying, you may specify optional scopes to the operation. Doing

lib/src/index_settings.dart

@@ -1,4 +1,4 @@
-part of algolia;
+part of '../algolia.dart';
 
 ///
 /// **AlgoliaIndexSettings**
@@ -59,8 +59,7 @@ class AlgoliaSettings {
   @override
   String toString() {
     return {
-      'url': '${algolia._host}indexes' +
-          (_index.isNotEmpty ? '/' + Uri.encodeFull(_index) : ''),
+      'url': '${algolia._host}indexes${_index.isNotEmpty ? '/${Uri.encodeFull(_index)}' : ''}',
       'headers': algolia._headers,
       'parameters': _parameters,
     }.toString();

lib/src/index_snapshot.dart

@@ -1,4 +1,4 @@
-part of algolia;
+part of '../algolia.dart';
 
 class AlgoliaIndexesSnapshot {
   AlgoliaIndexesSnapshot._(this.algolia, Map<String, dynamic> map)

lib/src/object_reference.dart

@@ -1,4 +1,4 @@
-part of algolia;
+part of '../algolia.dart';
 
 class AlgoliaObjectReference {
   AlgoliaObjectReference._(this.algolia, String? index, String? objectId)

lib/src/object_snapshot.dart

@@ -1,4 +1,4 @@
-part of algolia;
+part of '../algolia.dart';
 
 // Implementation & bug solved by https://github.com/franvera
 // - highlightResult [Bug] (commit ref: 0d76d24fe8aa347a0933920afe5ded43bdcbd68b)

lib/src/query.dart

@@ -1,4 +1,4 @@
-part of algolia;
+part of '../algolia.dart';
 
 enum AlgoliaSortFacetValuesBy {
   alpha,
@@ -49,8 +49,7 @@ class AlgoliaQuery {
   @override
   String toString() {
     return {
-      'url': '${algolia._host}indexes' +
-          (encodedIndex.isNotEmpty ? '/' + encodedIndex : ''),
+      'url': '${algolia._host}indexes${encodedIndex.isNotEmpty ? '/$encodedIndex' : ''}',
       'headers': algolia._headers,
       'parameters': _parameters,
     }.toString();

lib/src/query_snapshot.dart

@@ -1,4 +1,4 @@
-part of algolia;
+part of '../algolia.dart';
 
 class AlgoliaQuerySnapshot {
   AlgoliaQuerySnapshot._(this.algolia, this.index, Map<String, dynamic> map)

lib/src/synonyms_reference.dart

@@ -1,4 +1,4 @@
-part of algolia;
+part of '../algolia.dart';
 
 enum SynonymsType {
   synonym,

lib/src/task.dart

@@ -1,4 +1,4 @@
-part of algolia;
+part of '../algolia.dart';
 
 class AlgoliaTask {
   AlgoliaTask._(this.algolia, String? index, Map<String, dynamic> data)

lib/src/util/enum_util.dart

@@ -1,4 +1,4 @@
-part of algolia;
+part of '../../algolia.dart';
 
 class EnumUtil {
   static T fromStringEnum<T>(Iterable<T> values, String stringType) {

lib/src/util/json_encode.dart

@@ -1,4 +1,4 @@
-part of algolia;
+part of '../../algolia.dart';
 
 dynamic jsonEncodeHelper(dynamic item) {
   if (item is DateTime) {