prepareFormWithBinaryData
inline suspend fun HttpClient.prepareFormWithBinaryData(formData: List<PartData>, crossinline block: HttpRequestBuilder.() -> Unit = {}): HttpStatement
inline suspend fun HttpClient.prepareFormWithBinaryData(url: String, formData: List<PartData>, crossinline block: HttpRequestBuilder.() -> Unit = {}): HttpStatement
Prepares a POST request containing form parameters encoded using the multipart/form-data format.