Fixed a bug in which certain characters, such as the + character, w…

…ere not being properly percent-encoded in `Dictionary.formURLEncoded()`.

.swiftpm/xcode/xcshareddata/xcschemes/SpotifyAPI-Package.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1610"
+   LastUpgradeVersion = "1620"
    version = "1.7">
    <BuildAction
       parallelizeBuildables = "YES"

.swiftpm/xcode/xcshareddata/xcschemes/SpotifyAPI.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1610"
+   LastUpgradeVersion = "1620"
    version = "1.7">
    <BuildAction
       parallelizeBuildables = "YES"

CHANGELOG.md

@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [4.0.1] - 12/25/2024
+
+* Fixed a bug in which certain characters, such as the `+` character, were not being properly percent-encoded in `Dictionary.formURLEncoded()`. See [#70](https://github.com/Peter-Schorn/SpotifyAPI/pull/70).
+
 ## [4.0.0] - 12-10-2024
 
 * Added `SpotifyAPI.audiobookChapters(_:market:limit:offset:)`.

Sources/SpotifyWebAPI/Other/MiscellaneousUtilities.swift

@@ -23,12 +23,17 @@ public extension Dictionary where Key == String, Value == String {
      utf-8 character encoding.
      */
     func formURLEncoded() -> Data? {
+
+        let formDataString = self.map { key, value in
+            key.addingPercentEncoding(
+                withAllowedCharacters: .formURLAllowed
+            )! + "=" + value.addingPercentEncoding(
+                withAllowedCharacters: .formURLAllowed
+            )!
+        }.joined(separator: "&")
 
-        var urlComponents = URLComponents()
-        urlComponents.queryItems = self.map { item in
-            URLQueryItem(name: item.key, value: item.value)
-        }
-        return (urlComponents.percentEncodedQuery ?? "").data(using: .utf8)
+        return formDataString.data(using: .utf8)
+
     }
 
 }
@@ -225,6 +230,11 @@ public extension CharacterSet {
         .urlPathAllowed
     )
 
+    /// The characters that are allowed in a form-urlencoded string.
+    static let formURLAllowed = CharacterSet(
+        charactersIn: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_.~"
+    )
+
 }
 
 /// Generates an array of offests to get each page of results.