How to use writeDataPart method of com.github.kittinunf.fuel.core.requests.internal class

...99                writeParameter(stream, name, data).toDouble()100            }101            // Blobs / Files102            val filesWithHeadersLength = lazyDataparts.sumByDouble { lazyDataPart ->103                writeDataPart(stream, lazyDataPart(request)).toDouble()104            }105            // Sum and Trailer106            val writtenLength = 0L +107                parameterLength +108                filesWithHeadersLength +109                stream.writeBoundary() + stream.writeString("--") +110                stream.writeNewline()111            // This is a buffered stream, so flush what's remaining112            writtenLength.toLong().also { stream.flush() }113        }114    }115    /**116     * Returns the length of the body in bytes117     * @return [Long?] the length in bytes, null if it is unknown118     */119    override val length: Long? by lazy {120        (121            // Parameters size122            request.parameters.sumByDouble { (name, data) ->123                writeParameter(ByteArrayOutputStream(), name, data).toDouble()124            } +125            // Blobs / Files size126            request.dataParts.sumByDouble { lazyDataPart ->127                val dataPart = lazyDataPart(request)128                // Allow for unknown sizes129                val length = dataPart.contentLength ?: return@lazy null130                if (length == -1L) return@lazy -1L131                0.0 + writeDataPartHeader(ByteArrayOutputStream(), dataPart) + length + CRLF.size132            } +133            // Trailer size134            "--$boundary--".toByteArray(DEFAULT_CHARSET).size + CRLF.size135        ).toLong()136    }137    private val boundary: String by lazy {138        request[Headers.CONTENT_TYPE].lastOrNull()139            ?.let { Regex("boundary=([^\\s]+)").find(it)?.groupValues?.getOrNull(1)?.trim('"') }140            ?: throw BoundaryMissing(request)141    }142    private fun writeParameter(outputStream: OutputStream, name: String, data: Any?): Long {143        outputStream.apply {144            return 0L +145                writeBoundary() +146                writeNewline() +147                writeString("${Headers.CONTENT_DISPOSITION}: form-data; name=\"$name\"") +148                writeNewline() +149                writeString("${Headers.CONTENT_TYPE}: text/plain; charset=\"${DEFAULT_CHARSET.name()}\"") +150                writeNewline() +151                writeNewline() +152                writeString(data.toString()) +153                writeNewline()154        }155    }156    private fun writeDataPart(outputStream: OutputStream, dataPart: DataPart): Long {157        outputStream.apply {158            val headerLength = writeDataPartHeader(outputStream, dataPart)159            val dataLength = dataPart.inputStream().use { it.copyTo(this) }160            return headerLength + dataLength + writeNewline()161        }162    }163    private fun writeDataPartHeader(outputStream: OutputStream, dataPart: DataPart): Long {164        outputStream.apply {165            return 0L +166                writeBoundary() +167                writeNewline() +168                writeString("${Headers.CONTENT_DISPOSITION}: ${dataPart.contentDisposition}") +169                writeNewline() +170                writeString("${Headers.CONTENT_TYPE}: ${dataPart.contentType}") +171                writeNewline() +172                writeNewline()173        }174    }175    private fun OutputStream.writeNewline() = writeBytes(CRLF)176    private fun OutputStream.writeBytes(bytes: ByteArray) = write(bytes).let { bytes.size.toLong() }177    private fun OutputStream.writeString(string: String, charset: Charset = DEFAULT_CHARSET) = writeBytes(string.toByteArray(charset))...

1public static void writeDataPart(java.io.OutputStream out, java.lang.String name, java.lang.String fileName, java.lang.String contentType, byte[] data) throws java.io.IOException {2public static void writeDataPart(java.io.OutputStream out, java.lang.String name, java.lang.String fileName, java.lang.String contentType, byte[] data) throws java.io.IOException {3public static void writeDataPart(java.io.OutputStream out, java.lang.String name, java.lang.String fileName, java.lang.String contentType, byte[] data) throws java.io.IOException {4public static void writeDataPart(java.io.OutputStream out, java.lang.String name, java.lang.String fileName, java.lang.String contentType, byte[] data) throws java.io.IOException {5public static void writeDataPart(java.io.OutputStream out, java.lang.String name, java.lang.String fileName, java.lang.String contentType, byte[] data) throws java.io.IOException {6public static void writeDataPart(java.io.OutputStream out, java.lang.String name, java.lang.String fileName, java.lang.String contentType, byte[] data) throws java.io.IOException {7public static void writeDataPart(java.io.OutputStream out, java.lang.String name, java.lang.String fileName, java.lang.String contentType, byte[] data) throws java.io.IOException {8public static void writeDataPart(java.io.OutputStream out, java.lang.String name, java.lang.String fileName, java.lang.String contentType, byte[] data) throws java.io.IOException {9public static void writeDataPart(java.io.OutputStream out, java.lang.String name, java.lang.String fileName, java.lang.String contentType, byte[] data) throws java.io.IOException

1val params = listOf("name" to "John Doe", "age" to 27)2val params = listOf("name" to "John Doe", "age" to 27)3val params = listOf("name" to "John Doe", "age" to 27)4val params = listOf("name" to "John Doe", "age" to 27)5val params = listOf("name" to "John Doe", "age" to 27)6val params = listOf("name" to "John Doe", "age" to 27)7val params = listOf("name" to "John Doe", "age" to 27)8val params = listOf("name" to "John Doe", "age" to 27)9val (request, response, result) = "

1    val requestBody = writeDataPart(request.body)2    val requestStream = new ByteArrayInputStream(requestBody)3    val requestEntity = new InputStreamEntity(requestStream, requestBody.length)4    requestEntity.setContentType(request.contentType)5    requestEntity.setContentEncoding(request.contentEncoding)6    requestEntity.setChunked(true)7    request.setEntity(requestEntity)8    val response = httpClient.execute(request)9    val responseBody = EntityUtils.toString(response.getEntity)10    val responseHeaders = response.getAllHeaders.map(h => h.getName -> h.getValue).toMap11    val responseContentType = Option(response.getEntity.getContentType).map(_.getValue).getOrElse("")12    val responseContentEncoding = Option(response.getEntity.getContentEncoding).map(_.getValue).getOrElse("")13    val (data, error) = if (responseCode >= 200 && responseCode < 300) {14      (responseBody, null)15    } else {16      (null, new Exception(responseMessage))17    }18    val result = new DefaultResult(19    response.close()20  }21}