[Kotlin] Replace deprecated Ktor base64 encoding with Kotlin std library call (#23345)

wing328 · rlnt · web-flow · commit 7ad89515063e · 2026-03-25T14:48:24.000+08:00
* replace deprecated Ktor base64 encoding with Kotlin std library call fixes #22808 * update kotlin samples --------- Co-authored-by: rlnt <relentless@rlnt.dev>
diff --git a/modules/openapi-generator/src/main/resources/kotlin-client/libraries/jvm-ktor/auth/HttpBasicAuth.kt.mustache b/modules/openapi-generator/src/main/resources/kotlin-client/libraries/jvm-ktor/auth/HttpBasicAuth.kt.mustache
@@ -1,6 +1,6 @@
 package {{packageName}}.auth
 
-import io.ktor.util.encodeBase64
+import kotlin.io.encoding.Base64
 
 {{^nonPublicApi}}{{#explicitApi}}public {{/explicitApi}}{{/nonPublicApi}}class HttpBasicAuth : Authentication {
     {{^nonPublicApi}}{{#explicitApi}}public {{/explicitApi}}{{/nonPublicApi}}var username: String? = null
@@ -9,7 +9,7 @@ import io.ktor.util.encodeBase64
     override fun apply(query: MutableMap<String, List<String>>, headers: MutableMap<String, String>) {
         if (username == null && password == null) return
         val str = (username ?: "") + ":" + (password ?: "")
-        val auth = str.encodeBase64()
+        val auth = Base64.encode(str.encodeToByteArray())
         headers["Authorization"] = "Basic $auth"
     }
 }
diff --git a/modules/openapi-generator/src/main/resources/kotlin-client/libraries/multiplatform/auth/HttpBasicAuth.kt.mustache b/modules/openapi-generator/src/main/resources/kotlin-client/libraries/multiplatform/auth/HttpBasicAuth.kt.mustache
@@ -1,6 +1,6 @@
 package {{packageName}}.auth
 
-import io.ktor.util.encodeBase64
+import kotlin.io.encoding.Base64
 
 {{^nonPublicApi}}{{#explicitApi}}public {{/explicitApi}}{{/nonPublicApi}}class HttpBasicAuth : Authentication {
     {{^nonPublicApi}}{{#explicitApi}}public {{/explicitApi}}{{/nonPublicApi}}var username: String? = null
@@ -9,7 +9,7 @@ import io.ktor.util.encodeBase64
     override fun apply(query: MutableMap<String, List<String>>, headers: MutableMap<String, String>) {
         if (username == null && password == null) return
         val str = (username ?: "") + ":" + (password ?: "")
-        val auth = str.encodeBase64()
+        val auth = Base64.encode(str.encodeToByteArray())
         headers["Authorization"] = "Basic $auth"
     }
 }
diff --git a/samples/client/petstore/kotlin-array-simple-string-multiplatform/src/commonMain/kotlin/org/openapitools/client/auth/HttpBasicAuth.kt b/samples/client/petstore/kotlin-array-simple-string-multiplatform/src/commonMain/kotlin/org/openapitools/client/auth/HttpBasicAuth.kt
@@ -1,6 +1,6 @@
 package org.openapitools.client.auth
 
-import io.ktor.util.encodeBase64
+import kotlin.io.encoding.Base64
 
 class HttpBasicAuth : Authentication {
     var username: String? = null
@@ -9,7 +9,7 @@ class HttpBasicAuth : Authentication {
     override fun apply(query: MutableMap<String, List<String>>, headers: MutableMap<String, String>) {
         if (username == null && password == null) return
         val str = (username ?: "") + ":" + (password ?: "")
-        val auth = str.encodeBase64()
+        val auth = Base64.encode(str.encodeToByteArray())
         headers["Authorization"] = "Basic $auth"
     }
 }
diff --git a/samples/client/petstore/kotlin-bigdecimal-default-multiplatform/src/commonMain/kotlin/org/openapitools/client/auth/HttpBasicAuth.kt b/samples/client/petstore/kotlin-bigdecimal-default-multiplatform/src/commonMain/kotlin/org/openapitools/client/auth/HttpBasicAuth.kt
@@ -1,6 +1,6 @@
 package org.openapitools.client.auth
 
-import io.ktor.util.encodeBase64
+import kotlin.io.encoding.Base64
 
 class HttpBasicAuth : Authentication {
     var username: String? = null
@@ -9,7 +9,7 @@ class HttpBasicAuth : Authentication {
     override fun apply(query: MutableMap<String, List<String>>, headers: MutableMap<String, String>) {
         if (username == null && password == null) return
         val str = (username ?: "") + ":" + (password ?: "")
-        val auth = str.encodeBase64()
+        val auth = Base64.encode(str.encodeToByteArray())
         headers["Authorization"] = "Basic $auth"
     }
 }
diff --git a/samples/client/petstore/kotlin-default-values-multiplatform/src/commonMain/kotlin/org/openapitools/client/auth/HttpBasicAuth.kt b/samples/client/petstore/kotlin-default-values-multiplatform/src/commonMain/kotlin/org/openapitools/client/auth/HttpBasicAuth.kt
@@ -1,6 +1,6 @@
 package org.openapitools.client.auth
 
-import io.ktor.util.encodeBase64
+import kotlin.io.encoding.Base64
 
 class HttpBasicAuth : Authentication {
     var username: String? = null
@@ -9,7 +9,7 @@ class HttpBasicAuth : Authentication {
     override fun apply(query: MutableMap<String, List<String>>, headers: MutableMap<String, String>) {
         if (username == null && password == null) return
         val str = (username ?: "") + ":" + (password ?: "")
-        val auth = str.encodeBase64()
+        val auth = Base64.encode(str.encodeToByteArray())
         headers["Authorization"] = "Basic $auth"
     }
 }
diff --git a/samples/client/petstore/kotlin-enum-integers-multiplatform/src/commonMain/kotlin/org/openapitools/client/auth/HttpBasicAuth.kt b/samples/client/petstore/kotlin-enum-integers-multiplatform/src/commonMain/kotlin/org/openapitools/client/auth/HttpBasicAuth.kt
@@ -1,6 +1,6 @@
 package org.openapitools.client.auth
 
-import io.ktor.util.encodeBase64
+import kotlin.io.encoding.Base64
 
 class HttpBasicAuth : Authentication {
     var username: String? = null
@@ -9,7 +9,7 @@ class HttpBasicAuth : Authentication {
     override fun apply(query: MutableMap<String, List<String>>, headers: MutableMap<String, String>) {
         if (username == null && password == null) return
         val str = (username ?: "") + ":" + (password ?: "")
-        val auth = str.encodeBase64()
+        val auth = Base64.encode(str.encodeToByteArray())
         headers["Authorization"] = "Basic $auth"
     }
 }
diff --git a/samples/client/petstore/kotlin-jvm-ktor-gson/src/main/kotlin/org/openapitools/client/auth/HttpBasicAuth.kt b/samples/client/petstore/kotlin-jvm-ktor-gson/src/main/kotlin/org/openapitools/client/auth/HttpBasicAuth.kt
@@ -1,6 +1,6 @@
 package org.openapitools.client.auth
 
-import io.ktor.util.encodeBase64
+import kotlin.io.encoding.Base64
 
 class HttpBasicAuth : Authentication {
     var username: String? = null
@@ -9,7 +9,7 @@ class HttpBasicAuth : Authentication {
     override fun apply(query: MutableMap<String, List<String>>, headers: MutableMap<String, String>) {
         if (username == null && password == null) return
         val str = (username ?: "") + ":" + (password ?: "")
-        val auth = str.encodeBase64()
+        val auth = Base64.encode(str.encodeToByteArray())
         headers["Authorization"] = "Basic $auth"
     }
 }
diff --git a/samples/client/petstore/kotlin-jvm-ktor-jackson/src/main/kotlin/org/openapitools/client/auth/HttpBasicAuth.kt b/samples/client/petstore/kotlin-jvm-ktor-jackson/src/main/kotlin/org/openapitools/client/auth/HttpBasicAuth.kt
@@ -1,6 +1,6 @@
 package org.openapitools.client.auth
 
-import io.ktor.util.encodeBase64
+import kotlin.io.encoding.Base64
 
 class HttpBasicAuth : Authentication {
     var username: String? = null
@@ -9,7 +9,7 @@ class HttpBasicAuth : Authentication {
     override fun apply(query: MutableMap<String, List<String>>, headers: MutableMap<String, String>) {
         if (username == null && password == null) return
         val str = (username ?: "") + ":" + (password ?: "")
-        val auth = str.encodeBase64()
+        val auth = Base64.encode(str.encodeToByteArray())
         headers["Authorization"] = "Basic $auth"
     }
 }
diff --git a/samples/client/petstore/kotlin-jvm-ktor-kotlinx_serialization/src/main/kotlin/org/openapitools/client/auth/HttpBasicAuth.kt b/samples/client/petstore/kotlin-jvm-ktor-kotlinx_serialization/src/main/kotlin/org/openapitools/client/auth/HttpBasicAuth.kt
@@ -1,6 +1,6 @@
 package org.openapitools.client.auth
 
-import io.ktor.util.encodeBase64
+import kotlin.io.encoding.Base64
 
 class HttpBasicAuth : Authentication {
     var username: String? = null
@@ -9,7 +9,7 @@ class HttpBasicAuth : Authentication {
     override fun apply(query: MutableMap<String, List<String>>, headers: MutableMap<String, String>) {
         if (username == null && password == null) return
         val str = (username ?: "") + ":" + (password ?: "")
-        val auth = str.encodeBase64()
+        val auth = Base64.encode(str.encodeToByteArray())
         headers["Authorization"] = "Basic $auth"
     }
 }
diff --git a/samples/client/petstore/kotlin-multiplatform-allOf-discriminator/src/commonMain/kotlin/org/openapitools/client/auth/HttpBasicAuth.kt b/samples/client/petstore/kotlin-multiplatform-allOf-discriminator/src/commonMain/kotlin/org/openapitools/client/auth/HttpBasicAuth.kt
@@ -1,6 +1,6 @@
 package org.openapitools.client.auth
 
-import io.ktor.util.encodeBase64
+import kotlin.io.encoding.Base64
 
 class HttpBasicAuth : Authentication {
     var username: String? = null
@@ -9,7 +9,7 @@ class HttpBasicAuth : Authentication {
     override fun apply(query: MutableMap<String, List<String>>, headers: MutableMap<String, String>) {
         if (username == null && password == null) return
         val str = (username ?: "") + ":" + (password ?: "")
-        val auth = str.encodeBase64()
+        val auth = Base64.encode(str.encodeToByteArray())
         headers["Authorization"] = "Basic $auth"
     }
 }
diff --git a/samples/client/petstore/kotlin-multiplatform-kotlinx-datetime/src/commonMain/kotlin/org/openapitools/client/auth/HttpBasicAuth.kt b/samples/client/petstore/kotlin-multiplatform-kotlinx-datetime/src/commonMain/kotlin/org/openapitools/client/auth/HttpBasicAuth.kt
@@ -1,6 +1,6 @@
 package org.openapitools.client.auth
 
-import io.ktor.util.encodeBase64
+import kotlin.io.encoding.Base64
 
 class HttpBasicAuth : Authentication {
     var username: String? = null
@@ -9,7 +9,7 @@ class HttpBasicAuth : Authentication {
     override fun apply(query: MutableMap<String, List<String>>, headers: MutableMap<String, String>) {
         if (username == null && password == null) return
         val str = (username ?: "") + ":" + (password ?: "")
-        val auth = str.encodeBase64()
+        val auth = Base64.encode(str.encodeToByteArray())
         headers["Authorization"] = "Basic $auth"
     }
 }
diff --git a/samples/client/petstore/kotlin-multiplatform/src/commonMain/kotlin/org/openapitools/client/auth/HttpBasicAuth.kt b/samples/client/petstore/kotlin-multiplatform/src/commonMain/kotlin/org/openapitools/client/auth/HttpBasicAuth.kt
@@ -1,6 +1,6 @@
 package org.openapitools.client.auth
 
-import io.ktor.util.encodeBase64
+import kotlin.io.encoding.Base64
 
 class HttpBasicAuth : Authentication {
     var username: String? = null
@@ -9,7 +9,7 @@ class HttpBasicAuth : Authentication {
     override fun apply(query: MutableMap<String, List<String>>, headers: MutableMap<String, String>) {
         if (username == null && password == null) return
         val str = (username ?: "") + ":" + (password ?: "")
-        val auth = str.encodeBase64()
+        val auth = Base64.encode(str.encodeToByteArray())
         headers["Authorization"] = "Basic $auth"
     }
 }

Original file line number	Diff line number	Diff line change
`@@ -1,6 +1,6 @@`
`1`	`1`	`package {{packageName}}.auth`
`2`	`2`
`3`		`-import io.ktor.util.encodeBase64`
	`3`	`+import kotlin.io.encoding.Base64`
`4`	`4`
`5`	`5`	`{{^nonPublicApi}}{{#explicitApi}}public {{/explicitApi}}{{/nonPublicApi}}class HttpBasicAuth : Authentication {`
`6`	`6`	`{{^nonPublicApi}}{{#explicitApi}}public {{/explicitApi}}{{/nonPublicApi}}var username: String? = null`
`@@ -9,7 +9,7 @@ import io.ktor.util.encodeBase64`
`9`	`9`	`override fun apply(query: MutableMap<String, List<String>>, headers: MutableMap<String, String>) {`
`10`	`10`	`if (username == null && password == null) return`
`11`	`11`	`val str = (username ?: "") + ":" + (password ?: "")`
`12`		`- val auth = str.encodeBase64()`
	`12`	`+ val auth = Base64.encode(str.encodeToByteArray())`
`13`	`13`	`headers["Authorization"] = "Basic $auth"`
`14`	`14`	`}`
`15`	`15`	`}`
Original file line number	Diff line number	Diff line change
`@@ -1,6 +1,6 @@`
`1`	`1`	`package org.openapitools.client.auth`
`2`	`2`
`3`		`-import io.ktor.util.encodeBase64`
	`3`	`+import kotlin.io.encoding.Base64`
`4`	`4`
`5`	`5`	`class HttpBasicAuth : Authentication {`
`6`	`6`	`var username: String? = null`
`@@ -9,7 +9,7 @@ class HttpBasicAuth : Authentication {`
`9`	`9`	`override fun apply(query: MutableMap<String, List<String>>, headers: MutableMap<String, String>) {`
`10`	`10`	`if (username == null && password == null) return`
`11`	`11`	`val str = (username ?: "") + ":" + (password ?: "")`
`12`		`- val auth = str.encodeBase64()`
	`12`	`+ val auth = Base64.encode(str.encodeToByteArray())`
`13`	`13`	`headers["Authorization"] = "Basic $auth"`
`14`	`14`	`}`
`15`	`15`	`}`