Multipart File upload in java using okHttp and HttpClient

OkHTTP:

There are several ways to upload the file. OKHTTP is a one of a  client to call 

an api to upload file to the server.

	public static String uploadfile(String sourceID,String accessToken) {
	String fileUploadID = null;
	InputStream is = null;
	Response response = null;
	try {
	// String sourceID = projectDetails.getString("sourceID"); //
	String test = "this is from text";
	is = new FileInputStream("C:\\Users\\lKadariya\\Desktop\\Test
	\\DTtest\\TestFile\\original_testcases\\100\\100sample.docx");
	byte []content = IOUtils.toByteArray(is);
	//byte []content = test.getBytes(StandardCharsets.UTF_8);
	String uri = "https://transport-stg.transperfect.com/api/files/upload?
	filename=test.docx&targetFolderId="+sourceID;
	final MediaType MEDIA_TYPE = MediaType.parse("multipart/form-data");
	OkHttpClient client = new OkHttpClient();
	RequestBody requestBody = new MultipartBody.Builder()
	.setType(MultipartBody.FORM)
	.addPart(
	Headers.of("Content-Disposition", "form-data;"),
	RequestBody.create(MEDIA_TYPE, content)
	)
	.build();
	Request request = new Request.Builder()
	.header("Authorization", "Bearer " + accessToken)
	.url(uri)
	.post(requestBody)
	.build();
	response = client.newCall(request).execute();
	int responseCode = response.code();
	if (responseCode != 200) {
	System.out.println("uploadfile: Did not receive token. HTTP code: " +
	responseCode + " responseBody:"+response.body());
	} else {
	String taggedResult = response.body().string();
	// System.out.println(taggedResult);
	Object json = new JSONTokener(taggedResult).nextValue();
	JSONObject jobj = null;
	if(json instanceof JSONObject){
	jobj = new JSONObject(taggedResult) ;
	} else if(json instanceof JSONArray){
	jobj = (JSONObject)new JSONArray(taggedResult).get(0);
	}
	Object error = jobj.getString("error");
	if (error == "null"){
	fileUploadID = (String)jobj.get("id");
	}
	}
	} catch (NoRouteToHostException re) {
	System.out.println("uploadfile: unable to route to host."+re);
	}catch (IOException ie) {
	System.out.println("uploadfile: problem executing HTTP request."+ ie);
	}catch (Exception e) {
	System.out.println("uploadfile: an error occurred." +e );
	} finally {
	response.body().close();
	try{
	if(is !=null)is.close();
	}catch (IOException e){
	System.out.println("uploadfile: an error occurred." +e );
	}
	}
	return fileUploadID;
	}

view raw OKHttp.java hosted with ❤ by GitHub

HTTPCLIENT:

We can also use HTTP Client to write an api client to upload files to server.

	public static String uploadDocumentFilehttp(String sourceID,String accessToken,
	String partID, String fileName) {
	String fileUploadID = null;
	try(CloseableHttpClient httpClient = HttpClientBuilder.create().build()) {
	byte fileData[] = Files.readAllBytes(Paths.get("C:\\Users\\lKadariya\\Desktop\\Test
	\\DTtest\\TestFile\\original_testcases\\100\\100sample.pptx"));
	String authorizationValue = "Bearer "+accessToken;
	HttpEntity data = MultipartEntityBuilder.create()
	.setMode(HttpMultipartMode.BROWSER_COMPATIBLE)
	.addBinaryBody("srcUploader",fileData,ContentType.DEFAULT_BINARY,fileName)
	.build();
	HttpUriRequest request = RequestBuilder.post("https://"+HOST_TRANSPORT+
	"/api/files/upload")
	.addHeader("Authorization",authorizationValue)
	.addHeader("Accept","application/json")
	.addParameter("filename",fileName)
	.addParameter("targetFolderId",sourceID)
	.setEntity(data)
	.build();
	try(CloseableHttpResponse response = httpClient.execute(request);) {
	int code = response.getStatusLine().getStatusCode();
	if (code != 200) {
	HttpEntity entity = response.getEntity();
	ContentType contentType = ContentType.getOrDefault(entity);
	Charset charset = contentType.getCharset();
	if (charset == null) {
	charset = Charset.forName("UTF-8");
	}
	String errorBody = EntityUtils.toString(entity, charset);
	// log.info("uploadfile: Unable to process uploadfile. HTTP code: " + code +
	" responseBody:"+errorBody);//
	throw new PostEditException("uploadfile: Unable to process uploadfile.
	HTTP code:" + code + " responseBody:"+errorBody);
	} else {
	HttpEntity entity = response.getEntity();
	ContentType contentType = ContentType.getOrDefault(entity);
	Charset charset = contentType.getCharset();
	if (charset == null) {
	charset = Charset.forName("UTF-8");
	}
	String taggedResult = EntityUtils.toString(entity, charset);
	Object json = new JSONTokener(taggedResult).nextValue();
	JSONObject jobj = null;
	if(json instanceof JSONObject){
	jobj = (JSONObject)json ;
	} else if(json instanceof JSONArray){
	jobj = (JSONObject)((JSONArray) json).getJSONObject(0);
	}
	Object error = jobj.getString("error");
	if (error == "null"){
	fileUploadID = (String)jobj.get("id");
	}
	}
	}catch (Exception e){
	// log.error("uploadfile: an error occurred in http execute." +e );//
	throw new PostEditException("uploadfile: an error occurred http execute.", e); }
	} catch (NoRouteToHostException re) {
	// log.error("uploadfile: unable to route to host."+re);//
	throw new PostEditException("uploadfile: unable to route to host.",re);
	}catch (IOException ie) {
	// log.error("uploadfile: problem executing HTTP request."+ ie);//
	throw new PostEditException("uploadfile: problem executing HTTP request.",ie);
	}catch (Exception e) {
	// log.error("uploadfile: an error occurred." +e );//
	throw new PostEditException("uploadfile: an error occurred.", e); }
	return fileUploadID;
	}

view raw HTTPClient.java hosted with ❤ by GitHub