encodeSet = FORM_ENCODE_SET,
            alreadyEncoded = true,
            plusIsSpace = true,
            charset = charset,
          )
      }

      fun build(): FormBody = FormBody(names, values)
    }

  companion object {
    private val CONTENT_TYPE: MediaType = "application/x-www-form-urlencoded".toMediaType()
  }

 */
package okhttp3.recipes.kt

import java.io.IOException
import okhttp3.FormBody
import okhttp3.HttpUrl.Companion.toHttpUrl
import okhttp3.OkHttpClient
import okhttp3.Request

class PostForm {
  private val client = OkHttpClient()

  fun run() {
    val formBody =
      FormBody
        .Builder()
        .add("search", "Jurassic Park")
        .build()
    val request =

import java.io.IOException
import java.nio.charset.StandardCharsets
import okio.Buffer
import org.junit.jupiter.api.Test

class FormBodyTest {
  @Test
  fun urlEncoding() {
    val body =
      FormBody
        .Builder()
        .add("a+=& b", "c+=& d")
        .add("space, the", "final frontier")
        .add("%25", "%25")
        .build()
    assertThat(body.size).isEqualTo(3)

  }

  @Test
  fun formBody() {
    val formBody: FormBody = FormBody.Builder().build()
    val size: Int = formBody.size
    val encodedName: String = formBody.encodedName(0)
    val name: String = formBody.name(0)
    val encodedValue: String = formBody.encodedValue(0)
    val value: String = formBody.value(0)
    val contentType: MediaType = formBody.contentType()

Use `FormBody.Builder` to build a request body that works like an HTML `<form>` tag. Names and values will be encoded using an HTML-compatible form URL encoding.

=== ":material-language-kotlin: Kotlin"
    ```kotlin
      private val client = OkHttpClient()

      fun run() {
        val formBody = FormBody.Builder()
            .add("search", "Jurassic Park")

}

public final class okhttp3/FormBody$Builder {
	public fun <init> ()V
	public fun <init> (Ljava/nio/charset/Charset;)V
	public synthetic fun <init> (Ljava/nio/charset/Charset;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
	public final fun add (Ljava/lang/String;Ljava/lang/String;)Lokhttp3/FormBody$Builder;
	public final fun addEncoded (Ljava/lang/String;Ljava/lang/String;)Lokhttp3/FormBody$Builder;

}

public final class okhttp3/FormBody$Builder {
	public fun <init> ()V
	public fun <init> (Ljava/nio/charset/Charset;)V
	public synthetic fun <init> (Ljava/nio/charset/Charset;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
	public final fun add (Ljava/lang/String;Ljava/lang/String;)Lokhttp3/FormBody$Builder;
	public final fun addEncoded (Ljava/lang/String;Ljava/lang/String;)Lokhttp3/FormBody$Builder;

    concurrently close an SSL socket. This would have appeared in crash logs as
    `NullPointerException: bio == null`.
 *  Fix: Use plus `+` instead of `%20` to encode space characters in `FormBody`. This was a
    longstanding bug in OkHttp. The fix makes OkHttp consistent with major web browsers.
 *  Fix: Don't crash if Conscrypt returns a null version.