Json

Processes the request and the response payload as JSON, serializingand de-serializing them using a specific serializer: JsonSerializer.

1. val client = HttpClient(HttpClientEngine) {
2. install(JsonFeature)
3. }

You have a full example using JSON.

This feature is defined in the class io.ktor.client.features.json.JsonFeature in the artifact io.ktor:ktor-client-json:$ktor_version.

• Common
• Jvm
• Native
• Js
• Kotlin
• Kotlin
• Maven
• Groovy

1. dependencies {
2. implementation "io.ktor:ktor-client-json:$ktor_version"
3. }

1. dependencies {
2. implementation("io.ktor:ktor-client-json:$ktor_version")
3. }

1. <project>
2. ...
3. <dependencies>
4. <dependency>
5. <groupId>io.ktor</groupId>
6. <artifactId>ktor-client-json</artifactId>
7. <version>${ktor.version}</version>
8. <scope>compile</scope>
9. </dependency>
10. </dependencies>
11. </project>

1. dependencies {
2. implementation "io.ktor:ktor-client-json-jvm:$ktor_version"
3. }

1. dependencies {
2. implementation("io.ktor:ktor-client-json-jvm:$ktor_version")
3. }

1. <project>
2. ...
3. <dependencies>
4. <dependency>
5. <groupId>io.ktor</groupId>
6. <artifactId>ktor-client-json-jvm</artifactId>
7. <version>${ktor.version}</version>
8. <scope>compile</scope>
9. </dependency>
10. </dependencies>
11. </project>

1. dependencies {
2. implementation "io.ktor:ktor-client-json-native:$ktor_version"
3. }

1. dependencies {
2. implementation("io.ktor:ktor-client-json-native:$ktor_version")
3. }

1. <project>
2. ...
3. <dependencies>
4. <dependency>
5. <groupId>io.ktor</groupId>
6. <artifactId>ktor-client-json-native</artifactId>
7. <version>${ktor.version}</version>
8. <scope>compile</scope>
9. </dependency>
10. </dependencies>
11. </project>

1. dependencies {
2. implementation "io.ktor:ktor-client-json-js:$ktor_version"
3. }

1. dependencies {
2. implementation("io.ktor:ktor-client-json-js:$ktor_version")
3. }

1. <project>
2. ...
3. <dependencies>
4. <dependency>
5. <groupId>io.ktor</groupId>
6. <artifactId>ktor-client-json-js</artifactId>
7. <version>${ktor.version}</version>
8. <scope>compile</scope>
9. </dependency>
10. </dependencies>
11. </project>

To use this feature with Kotlin/JS, you need to include the io.ktor:ktor-client-json-js artifact.

Serializers

The JsonFeature has a default serializer(implicitly obtained or by calling defaultSerializer())based on a ServiceLoader on JVM(supporting Gson or Jackson depending on the artifact included),and a serializer based on kotlinx.serialization for Native as well as for JavaScript.

You can also get the default serializer by calling io.ktor.client.features.json.defaultSerializer()

Gson

1. val client = HttpClient(HttpClientEngine) {
2. install(JsonFeature) {
3. serializer = GsonSerializer()
4. }
5. }

To use this feature, you need to include io.ktor:ktor-client-gson artifact.

Jackson

1. val client = HttpClient(HttpClientEngine) {
2. install(JsonFeature) {
3. serializer = JacksonSerializer()
4. }
5. }

To use this feature, you need to include io.ktor:ktor-client-jackson artifact.

Kotlinx.Serialization

1. val client = HttpClient(HttpClientEngine) {
2. install(JsonFeature) {
3. serializer = KotlinxSerializer()
4. }
5. }

«««< HEADTo use this feature, you need to include io.ktor:ktor-client-serialization-jvm artifact on the JVM and io.ktor:ktor-client-serialization-native on iOS.

=======

Add multiplatform dependencies

• Common
• Jvm
• Native
• Js
• Kotlin
• Kotlin
• Maven
• Groovy

1. dependencies {
2. implementation "io.ktor:ktor-client-serialization:$ktor_version"
3. }

1. dependencies {
2. implementation("io.ktor:ktor-client-serialization:$ktor_version")
3. }

1. <project>
2. ...
3. <dependencies>
4. <dependency>
5. <groupId>io.ktor</groupId>
6. <artifactId>ktor-client-serialization</artifactId>
7. <version>${ktor.version}</version>
8. <scope>compile</scope>
9. </dependency>
10. </dependencies>
11. </project>

1. dependencies {
2. implementation "io.ktor:ktor-client-serialization-jvm:$ktor_version"
3. }

1. dependencies {
2. implementation("io.ktor:ktor-client-serialization-jvm:$ktor_version")
3. }

1. <project>
2. ...
3. <dependencies>
4. <dependency>
5. <groupId>io.ktor</groupId>
6. <artifactId>ktor-client-serialization-jvm</artifactId>
7. <version>${ktor.version}</version>
8. <scope>compile</scope>
9. </dependency>
10. </dependencies>
11. </project>

1. dependencies {
2. implementation "io.ktor:ktor-client-serialization-native:$ktor_version"
3. }

1. dependencies {
2. implementation("io.ktor:ktor-client-serialization-native:$ktor_version")
3. }

1. <project>
2. ...
3. <dependencies>
4. <dependency>
5. <groupId>io.ktor</groupId>
6. <artifactId>ktor-client-serialization-native</artifactId>
7. <version>${ktor.version}</version>
8. <scope>compile</scope>
9. </dependency>
10. </dependencies>
11. </project>

1. dependencies {
2. implementation "io.ktor:ktor-client-serialization-js:$ktor_version"
3. }

1. dependencies {
2. implementation("io.ktor:ktor-client-serialization-js:$ktor_version")
3. }

1. <project>
2. ...
3. <dependencies>
4. <dependency>
5. <groupId>io.ktor</groupId>
6. <artifactId>ktor-client-serialization-js</artifactId>
7. <version>${ktor.version}</version>
8. <scope>compile</scope>
9. </dependency>
10. </dependencies>
11. </project>