feat(http): add new middleware feature

packages/wyatt_http_client/lib/src/utils/convert.dart

@@ -14,6 +14,8 @@
 // You should have received a copy of the GNU General Public License
 // along with this program. If not, see <https://www.gnu.org/licenses/>.
 
+import 'dart:convert';
+
 class Convert {
   static String toHex(List<int> bytes, {bool upperCase = false}) {
     final buffer = StringBuffer();
@@ -29,6 +31,15 @@ class Convert {
       return buffer.toString();
     }
   }
+
+  static String mapToQuery(Map<String, String> map, {Encoding? encoding}) {
+    final pairs = <List<String>>[];
+    map.forEach((key, value) => pairs.add([
+          Uri.encodeQueryComponent(key, encoding: encoding ?? utf8),
+          Uri.encodeQueryComponent(value, encoding: encoding ?? utf8)
+        ]),);
+    return pairs.map((pair) => '${pair[0]}=${pair[1]}').join('&');
+  }
 }
 
 extension UriX on Uri {

packages/wyatt_http_client/lib/src/utils/delay.dart

@@ -0,0 +1,36 @@
+// Copyright (C) 2022 WYATT GROUP
+// Please see the AUTHORS file for details.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+import 'dart:core';
+import 'dart:math';
+
+abstract class Delay {
+  static Duration getRetryDelay(int attempt) {
+    assert(attempt >= 0, 'attempt cannot be negative');
+    if (attempt <= 0) {
+      return Duration.zero;
+    }
+    final rand = Random();
+    final Duration delayFactor = const Duration(milliseconds: 200);
+    final double randomizationFactor = 0.25;
+    final Duration maxDelay = const Duration(seconds: 30);
+
+    final rf = randomizationFactor * (rand.nextDouble() * 2 - 1) + 1;
+    final exp = min(attempt, 31); // prevent overflows.
+    final delay = delayFactor * pow(2.0, exp) * rf;
+    return delay < maxDelay ? delay : maxDelay;
+  }
+}

packages/wyatt_http_client/lib/src/utils/protocols.dart

@@ -18,6 +18,5 @@ enum Protocols {
   http,
   https;
 
-  String get name => toString().split('.').last;
   String get scheme => '$name://';
 }

packages/wyatt_http_client/lib/src/utils/request_utils.dart

@@ -0,0 +1,89 @@
+// Copyright (C) 2022 WYATT GROUP
+// Please see the AUTHORS file for details.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+import 'package:http/http.dart';
+
+abstract class RequestUtils {
+  static Request _copyNormalRequestWith(
+    Request original, {
+    String? method,
+    Uri? url,
+    Map<String, String>? headers,
+    int? maxRedirects,
+    bool? followRedirects,
+    bool? persistentConnection,
+    String? body,
+  }) {
+    final request = Request(method ?? original.method, url ?? original.url)
+      ..followRedirects = followRedirects ?? original.followRedirects
+      ..headers.addAll(headers ?? original.headers)
+      ..maxRedirects = maxRedirects ?? original.maxRedirects
+      ..persistentConnection =
+          persistentConnection ?? original.persistentConnection
+      ..body = body ?? original.body;
+
+    return request;
+  }
+
+  static BaseRequest copyRequestWith(
+    BaseRequest original, {
+    String? method,
+    Uri? url,
+    Map<String, String>? headers,
+    int? maxRedirects,
+    bool? followRedirects,
+    bool? persistentConnection,
+    String? body,
+  }) {
+    if (original is Request) {
+      return _copyNormalRequestWith(
+        original,
+        method: method,
+        url: url,
+        headers: headers,
+        maxRedirects: maxRedirects,
+        followRedirects: followRedirects,
+        persistentConnection: persistentConnection,
+        body: body,
+      );
+    } else {
+      throw UnimplementedError(
+        'Cannot handle requests of type ${original.runtimeType}',
+      );
+    }
+  }
+
+  static Request _copyNormalRequest(Request original) {
+    final request = Request(original.method, original.url)
+      ..followRedirects = original.followRedirects
+      ..headers.addAll(original.headers)
+      ..maxRedirects = original.maxRedirects
+      ..persistentConnection = original.persistentConnection
+      ..body = original.body;
+
+    return request;
+  }
+
+  static BaseRequest copyRequest(BaseRequest original) {
+    if (original is Request) {
+      return _copyNormalRequest(original);
+    } else {
+      throw UnimplementedError(
+        'Cannot handle requests of type ${original.runtimeType}',
+      );
+    }
+  }
+}

packages/wyatt_http_client/lib/src/utils/utils.dart

@@ -1,89 +1,23 @@
 // Copyright (C) 2022 WYATT GROUP
 // Please see the AUTHORS file for details.
-//
+// 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // any later version.
-//
+// 
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 // GNU General Public License for more details.
-//
+// 
 // You should have received a copy of the GNU General Public License
 // along with this program. If not, see <https://www.gnu.org/licenses/>.
 
-import 'package:http/http.dart';
-
-abstract class Utils {
-  static Request _copyNormalRequest(Request original) {
-    final request = Request(original.method, original.url)
-      ..followRedirects = original.followRedirects
-      ..headers.addAll(original.headers)
-      ..maxRedirects = original.maxRedirects
-      ..persistentConnection = original.persistentConnection
-      ..body = original.body;
-
-    return request;
-  }
-
-  static Request _copyNormalRequestWith(
-    Request original, {
-    String? method,
-    Uri? url,
-    Map<String, String>? headers,
-    int? maxRedirects,
-    bool? followRedirects,
-    bool? persistentConnection,
-    String? body,
-  }) {
-    final request = Request(method ?? original.method, url ?? original.url)
-      ..followRedirects = followRedirects ?? original.followRedirects
-      ..headers.addAll(headers ?? original.headers)
-      ..maxRedirects = maxRedirects ?? original.maxRedirects
-      ..persistentConnection =
-          persistentConnection ?? original.persistentConnection
-      ..body = body ?? original.body;
-
-    return request;
-  }
-
-  static BaseRequest copyRequest(BaseRequest original) {
-    if (original is Request) {
-      return _copyNormalRequest(original);
-    } else {
-      throw UnimplementedError(
-        'Cannot handle requests of type ${original.runtimeType}',
-      );
-    }
-  }
-
-  static BaseRequest copyRequestWith(
-    BaseRequest original, {
-    String? method,
-    Uri? url,
-    Map<String, String>? headers,
-    int? maxRedirects,
-    bool? followRedirects,
-    bool? persistentConnection,
-    String? body,
-  }) {
-    if (original is Request) {
-      return _copyNormalRequestWith(
-        original,
-        method: method,
-        url: url,
-        headers: headers,
-        maxRedirects: maxRedirects,
-        followRedirects: followRedirects,
-        persistentConnection: persistentConnection,
-        body: body,
-      );
-    } else {
-      throw UnimplementedError(
-        'Cannot handle requests of type ${original.runtimeType}',
-      );
-    }
-  }
-}
+export 'authentication_methods.dart';
+export 'digest_auth.dart';
+export 'header_keys.dart';
+export 'http_methods.dart';
+export 'http_status.dart';
+export 'protocols.dart';
+export 'request_utils.dart';