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Android multiple input q parameters in Google Translate API , with volley java

How to send multiple q input texts? As I see, the API doesn't allow q[] type arrays, instead it uses multiple q parameters.
protected Map<String,String> getParams(){
List<String> textString = new ArrayList<>();
Map<String,String> params = new HashMap<String, String>();
params.put("key", "key");
params.put("target", "DE");
params.put("q", text);
return params;
}
};

I found the following helper class:
class HttpParams extends HashMap<String, List<String>> {
private static final long serialVersionUID = 1L;
public HttpParams() {
super();
}
public HttpParams(int capacity) {
super(capacity);
}
public HttpParams(Map<String, List<String>> map) {
super(map);
}
public HttpParams(int capacity, float loadFactor) {
super(capacity, loadFactor);
}
/*
* This is the method to use for adding post parameters
*/
public void add(String key, String value) {
if (containsKey(key)) {
get(key).add(value);
}
else {
ArrayList<String> list = new ArrayList<String>();
list.add(value);
put(key, list);
}
}
/**
* Converts the Map into an application/x-www-form-urlencoded encoded string.
*/
public byte[] encodeParameters(String paramsEncoding) {
StringBuilder encodedParams = new StringBuilder();
try {
for (Map.Entry<String, List<String>> entry : entrySet()) {
String key = URLEncoder.encode(entry.getKey(), paramsEncoding);
for (String value : entry.getValue()) {
encodedParams.append(key);
encodedParams.append('=');
try {
encodedParams.append(URLEncoder.encode(value, paramsEncoding));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
encodedParams.append('&');
}
}
return encodedParams.toString().getBytes(paramsEncoding);
} catch (UnsupportedEncodingException uee) {
throw new RuntimeException("Encoding not supported: " + paramsEncoding, uee);
}
}
}
and then in Main class that extends Request overrided the getBody():
public void volleyPost(String text,OnServiceResponseListener onServiceResponseListener){
String URL = "Your Url here";
RequestQueue requestQueue = Volley.newRequestQueue(this);
HttpParams mParams = new HttpParams();
mParams.add("key", "key");
mParams.add("target", "languageCode");
String wordsArray [] = text.split(",");
for(int i = 0;i<wordsArray.length;i++) {
mParams.add("q", wordsArray[i]);
}
StringRequest stringRequest = new StringRequest(Request.Method.POST, URL,
new Response.Listener<String>() {
#Override
public void onResponse(String response) {
onServiceResponseListener.onSuccess(response);
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
onServiceResponseListener.onFailed(error.getMessage());
}
}){
#Override
public byte[] getBody() throws AuthFailureError {
if (mParams != null && mParams.size() > 0) {
Log.d(TAG,"mParams--->"+new Gson().toJson(mParams));
return mParams.encodeParameters(getParamsEncoding());
}
return null;
}
};
requestQueue.add(stringRequest);
}

Android Volley POST to Java EE not working

I'm trying to call a POST-Method on my Android Device to my Java EE Webapplication. Java Version 8, Android Application is on API Level 22 and i'm using a virtual device on my computer.
I can add the request to the Volley-queue but then it doesn't resolve my POST request.
This is the CustomerService on the Java EE Application:
#EJB
CustomerBean customerBean;
#POST
#Produces(MediaType.APPLICATION_JSON)
#Path("/registration")
public Long registration(#FormParam("email") String email, #FormParam("password") String pw) {
Customer c = customerBean.registration(email, pw);
if(c == null) {
return (long) 0;
}
return c.getId();
}
And this is the called method on CustomerBean:
#PersistenceContext
private EntityManager em;
public Customer registration(String email, String password) {
Customer c = (Customer) em.createQuery("FROM " + Customer.class.getSimpleName() + " c WHERE c.email = :email")
.setParameter("email", email).getSingleResult();
if(c == null) {
c = new Customer();
c.setEmail(email);
c.setPassword(password);
em.persist(c);
em.flush();
return c;
}
else {
return null;
}
}
And this is my Android-Client, who's sending the POST Request (MainActivity):
private Long api_regist(final String email, final String password) throws IOException {
RequestQueue queue = Volley.newRequestQueue(this);
String url = "http://10.0.2.2:8080/onlineshop-web/api/customer/registration";
final String[] result = new String[1];
StringRequest postRequest = new StringRequest(Request.Method.POST, url,
new Response.Listener<String>()
{
#Override
public void onResponse(String response) {
// response
Log.d("Response", response);
result[0] = response;
}
},
new Response.ErrorListener()
{
#Override
public void onErrorResponse(VolleyError error) {
// error
Log.d("Error.Response", error.toString());
}
}
) {
#Override
protected Map<String, String> getParams()
{
Map<String, String> params = new HashMap<String, String>();
params.put("email", email);
params.put("password", password);
return params;
}
};
queue.add(postRequest);
while (result[0] == null){
Log.d("Result:", " Empty");
} //TODO return value afterwards
So the result[0] is allways null.

How to initialize Multipart request for custom HttpServeletRequest

I am using springboot 2x. Our project is using a Custom HttpServeletRequest which extends HttpServletRequestWrapper and implements MultipartHttpServletRequest. Everything works fine. But when I want to work for file upload, it can't initialized Multipart request. It shows error :
java.lang.IllegalStateException: Multipart request not initialized
My question is, how can I solve this error. How Multipart request will be initialized.
I am giving all code regarding this.
public class XHttpServletRequest extends HttpServletRequestWrapper implements MultipartHttpServletRequest {
public XHttpServletRequest (HttpServletRequest request) {
super(request);
}
private MultiValueMap<String, MultipartFile> multipartFiles;
private String method;
#Override
public String getMethod() {
if (this.method == null) return super.getMethod();
return this.method;
}
public void setMethod(String method) {
this.method = method;
}
private Map<String,String[]> parameters = new LinkedHashMap<String,String[]>();
public void setParameter(String name, String value) {
parameters.put(name, new String[] {value});
}
#Override
public String getParameter(String name) {
if (parameters.get(name) != null) {
return parameters.get(name)[0];
}
HttpServletRequest req = (HttpServletRequest) super.getRequest();
return req.getParameter(name);
}
public Map<String, String[]> getParameterMap() {
Map<String, String[]> result = new LinkedHashMap<String, String[]>();
result.putAll(super.getRequest().getParameterMap());
result.putAll(parameters);
return Collections.<String, String[]>unmodifiableMap(result);
}
public Enumeration<String> getParameterNames() {
Set<String> result = new LinkedHashSet<String>(Collections.list(super.getRequest().getAttributeNames()));
result.addAll(parameters.keySet());
return new Vector<String>(result).elements();
}
public String[] getParameterValues(String name) {
if (parameters.get(name) != null) {
return parameters.get(name);
}
HttpServletRequest req = (HttpServletRequest) super.getRequest();
return req.getParameterValues(name);
}
#Override
public HttpServletRequest getRequest() {
return (HttpServletRequest) super.getRequest();
}
#Override
public HttpMethod getRequestMethod() {
return HttpMethod.resolve(getRequest().getMethod());
}
#Override
public HttpHeaders getRequestHeaders() {
HttpHeaders headers = new HttpHeaders();
Enumeration<String> headerNames = getHeaderNames();
while (headerNames.hasMoreElements()) {
String headerName = headerNames.nextElement();
headers.put(headerName, Collections.list(getHeaders(headerName)));
}
return headers;
}
#Override
public HttpHeaders getMultipartHeaders(String s) {
return null;
}
#Override
public Iterator<String> getFileNames() {
return getMultipartFiles().keySet().iterator();
}
#Override
public MultipartFile getFile(String name) {
return getMultipartFiles().getFirst(name);
}
#Override
public List<MultipartFile> getFiles(String name) {
List<MultipartFile> multipartFiles = getMultipartFiles().get(name);
if (multipartFiles != null) {
return multipartFiles;
}
else {
return Collections.emptyList();
}
}
#Override
public Map<String, MultipartFile> getFileMap() {
return getMultipartFiles().toSingleValueMap();
}
#Override
public MultiValueMap<String, MultipartFile> getMultiFileMap() {
return getMultipartFiles();
}
#Override
public String getMultipartContentType(String s) {
return null;
}
/**
* Set a Map with parameter names as keys and list of MultipartFile objects as values.
* To be invoked by subclasses on initialization.
*/
protected final void setMultipartFiles(MultiValueMap<String, MultipartFile> multipartFiles) {
this.multipartFiles =
new LinkedMultiValueMap<>(Collections.unmodifiableMap(multipartFiles));
}
/**
* Obtain the MultipartFile Map for retrieval,
* lazily initializing it if necessary.
* #see #initializeMultipart()
*/
protected MultiValueMap<String, MultipartFile> getMultipartFiles() {
if (this.multipartFiles == null) {
initializeMultipart();
}
return this.multipartFiles;
}
/**
* Lazily initialize the multipart request, if possible.
* Only called if not already eagerly initialized.
*/
protected void initializeMultipart() {
throw new IllegalStateException("Multipart request not initialized");
}
}
Another class extends XHttpServletRequest and this is instead of HttpServeletRequest in our project. The following code:
public class YHttpRequest extends MutableHttpServletRequest {
private ByteArrayOutputStream cachedBytes;
public YHttpRequest(HttpServletRequest request) {
super(request);
}
#Override
public ServletInputStream getInputStream() throws IOException {
if (cachedBytes == null)
cacheInputStream();
return new CachedServletInputStream();
}
#Override
public BufferedReader getReader() throws IOException{
return new BufferedReader(new InputStreamReader(getInputStream()));
}
private void cacheInputStream() throws IOException {
/* Cache the inputstream in order to read it multiple times. For
* convenience, I use apache.commons IOUtils
*/
cachedBytes = new ByteArrayOutputStream();
IOUtils.copy(super.getInputStream(), cachedBytes);
}
public List<Map<String, Object>> getListData() throws RequestException {
List<Map<String, Object>> data = new ArrayList<>();
try {
ObjectMapper mapper = new ObjectMapper();
data = mapper.readValue(this.getInputStream(), new TypeReference<ArrayList<LinkedHashMap>>(){});
System.out.println(data);
}
catch (Exception e) {
// System.out.println(e.)
throw new RequestException("Unable to parse request data", e);
}
return data;
}
private Object cachedData = null;
public Object getRawData() throws RequestException {
Object data = new LinkedHashMap<>();
try {
ObjectMapper mapper = new ObjectMapper();
// data = mapper.readValue(this.getInputStream());
try {
data = mapper.readValue(this.getInputStream(), new TypeReference<HashMap>() {
});
}
catch (JsonMappingException e) {
// e.printStackTrace();
}
try {
data = mapper.readValue(this.getInputStream(), new TypeReference<List<HashMap>>() {
});
}
catch (JsonMappingException e) {
// e.printStackTrace();
}
System.out.println(data);
}
catch (Exception e) {
// System.out.println(e.)
throw new RequestException("Unable to parse request data", e);
}
return data;
}
public Object getData() throws RequestException {
if (this.cachedData == null) {
this.cachedData = this.getRawData();
}
return this.cachedData;
}
/* An inputstream which reads the cached request body */
public class CachedServletInputStream extends ServletInputStream {
private ByteArrayInputStream input;
public CachedServletInputStream() {
/* create a new input stream from the cached request body */
input = new ByteArrayInputStream(cachedBytes.toByteArray());
}
#Override
public boolean isFinished() {
return input.available() == 0;
}
#Override
public boolean isReady() {
return true;
}
#Override
public void setReadListener(ReadListener readListener) {
// throw new IOException("zubair says: Method not implemented in Cached Servlet Input Stream class");
}
#Override
public int read() throws IOException {
return input.read();
}
}
// Storage for Path variable
private Map<String, Object> pathVariableMap = null;
public Map<String, Object> getPathVariableMap() {
if (this.pathVariableMap == null) {
this.pathVariableMap = new LinkedHashMap<>();
this.pathVariableMap.putAll((Map<? extends String, ?>) this.getAttribute(HandlerMapping.URI_TEMPLATE_VARIABLES_ATTRIBUTE));
}
return this.pathVariableMap;
}
public Object getPathVariable(String key) {
return this.getPathVariableMap().get(key);
}
public FurinaHttpRequest setPathVariable(String key, Object value) {
this.getPathVariableMap().put(key, value);
return this;
}
public FurinaHttpRequest clearPathVariableMap() {
this.getPathVariableMap().clear();
return this;
}
}
The controller code:
public String handleFileUpload(YHttpRequest request) {
if (request.getMethod().equalsIgnoreCase("GET")){
return "{}";
}
Map<String, MultipartFile> file= request.getFileMap();
try {
for(Map.Entry<String, MultipartFile> entry : file.entrySet()){
storageService.store(entry.getValue());
//model.addAttribute("message", "You successfully uploaded " + entry.getValue().getOriginalFilename() + "!");
files.add(entry.getValue().getOriginalFilename());
}
} catch (Exception e) {
//model.addAttribute("message", "FAIL to upload !");
}
return "{}";
}

This will work
public String handleFileUpload(YHttpRequest request) {
if (request.getMethod().equalsIgnoreCase("GET")){
return "{}";
}
StandardMultipartHttpServletRequest standardMultipartHttpServletRequest = new StandardMultipartHttpServletRequest(request);
Map<String, MultipartFile> file= request.getFileMap();
try {
for(Map.Entry<String, MultipartFile> entry : file.entrySet()){
storageService.store(entry.getValue());
//model.addAttribute("message", "You successfully uploaded " + entry.getValue().getOriginalFilename() + "!");
files.add(entry.getValue().getOriginalFilename());
}
} catch (Exception e) {
//model.addAttribute("message", "FAIL to upload !");
}
return "{}";
}

Can we send body with x-www-url-form-encodede in delete request using volley library?

How to send data in x-www-form-urlencoded in android to pass delete request?
#Override
public byte[] getBody() {
Map<String, String> params = new HashMap<>();
params.put("is_admin","1");
params.put("client_dbname",sessionManager.clientdbname());
params.put("user_id" ,"1");
//yeah, I copied this from the base method.
if (params !=null)
{
try {
para = params.toString().getBytes("UTF-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
return para;
}

This because Volley doesn't send the Body for DELETE by default. Only for POST, PUT and PATCH.
Use this third party for Delete Request
https://github.com/ngocchung/DeleteRequest
Try this class for Delete Request:
public class StringJSONBodyReqest extends StringRequest {
private static final String TAG = StringJSONBodyReqest.class.getName();
private final String mContent;
public StringJSONBodyReqest(int method, String url, String content, Response.Listener<String> listener, Response.ErrorListener errorListener) {
super(method, url, listener, errorListener);
mContent = content;
}
#Override
public Map<String, String> getHeaders() throws AuthFailureError {
HashMap<String, String> headers = new HashMap<String, String>();
headers.put("api-version", "1");
return headers;
}
#Override
public byte[] getBody() throws AuthFailureError {
byte[] body = new byte[0];
try {
body = mContent.getBytes("UTF-8");
} catch (UnsupportedEncodingException e) {
Log.e(TAG, "Unable to gets bytes from JSON", e.fillInStackTrace());
}
return body;
}
#Override
public String getBodyContentType() {
return "application/json";
}
}

Unable to mimmick POSTMAN request in Volley

I am new to using Volley on Android. Using the old http client stuff I could make my web requests perfectly with the various headers and parameters, now I am unable. My request looks like this in Postman:
POST /token HTTP/1.1
Host: my.api.co.za
Accept: application/json
Content-Type: application/x-www-form-urlencoded
Cache-Control: no-cache
username=test&password=1234&grant_type=password
Yet I am unable to recreate and execute this request in Volley. I have tried making a custom Json request class that extends Request<JSONObject> but to no avail. Please see my code below:
public class CustomJsonRequest extends Request<JSONObject> {
private Response.Listener<JSONObject> listener;
private Map<String, String> params;
public CustomJsonRequest(int method, String url, Listener<JSONObject> responseListener, ErrorListener errorListener) {
super(method, url, errorListener);
this.listener = responseListener;
}
#Override
public Map getHeaders() throws AuthFailureError {
Map headers = new HashMap();
headers.put("Accept", "application/json");
headers.put("Content-Type", "application/x-www-form-urlencoded");
return headers;
}
#Override
public byte[] getBody() throws AuthFailureError {
HashMap<String, String> params = new HashMap<String, String>();
params.put("username", "test");
params.put("password", "1234");
params.put("grant_type", "password");
if (params != null && params.size() > 0) {
return encodeParameters(params, getParamsEncoding());
}
return null;
}
/**
* Converts <code>params</code> into an application/x-www-form-urlencoded encoded string.
*/
private byte[] encodeParameters(Map<String, String> params, String paramsEncoding) {
StringBuilder encodedParams = new StringBuilder();
try {
for (Map.Entry<String, String> entry : params.entrySet()) {
encodedParams.append(URLEncoder.encode(entry.getKey(), paramsEncoding));
encodedParams.append('=');
encodedParams.append(URLEncoder.encode(entry.getValue(), paramsEncoding));
encodedParams.append('&');
}
encodedParams.deleteCharAt(encodedParams.lastIndexOf("&"));
Log.e("params", encodedParams.toString());
return encodedParams.toString().getBytes(paramsEncoding);
} catch (UnsupportedEncodingException uee) {
throw new RuntimeException("Encoding not supported: " + paramsEncoding, uee);
}
}
#Override
protected Response<JSONObject> parseNetworkResponse(NetworkResponse response) {
try {
String jsonString = new String(response.data,
HttpHeaderParser.parseCharset(response.headers));
Log.e("response", response.toString());
return Response.success(new JSONObject(jsonString),
HttpHeaderParser.parseCacheHeaders(response));
} catch (UnsupportedEncodingException e) {
return Response.error(new ParseError(e));
} catch (JSONException je) {
return Response.error(new ParseError(je));
}
}
#Override
protected void deliverResponse(JSONObject response) {
// TODO Auto-generated method stub
Log.e("response", response.toString());
listener.onResponse(response);
}
private Priority mPriority;
public void setPriority(Priority priority) {
mPriority = priority;
}
#Override
public Priority getPriority() {
return mPriority == null ? Priority.NORMAL : mPriority;
}
}
And I call this as follows in my MainActivity class:
CustomJsonRequest request = new CustomJsonRequest(Request.Method.POST, AUTH_URL, new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
//showJSON(response);
VolleyLog.v("Response:%n %s", response);
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
txtError(error);
}
});
Can somebody tell me where I am going wrong in creating this request?

You can try with my following sample code:
String url = "http://server/token";
Map<String, String> stringMap = new HashMap<>();
stringMap.put("grant_type", "password");
stringMap.put("username", "bnk");
stringMap.put("password", "bnk123");
Uri.Builder builder = new Uri.Builder();
Iterator entries = stringMap.entrySet().iterator();
while (entries.hasNext()) {
Map.Entry entry = (Map.Entry) entries.next();
builder.appendQueryParameter(entry.getKey().toString(), entry.getValue().toString());
entries.remove();
}
String requestBody = builder.build().getEncodedQuery();
JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.POST, url, requestBody, new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
// do something...
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
// do something...
}
}){
#Override
public String getBodyContentType() {
return "application/x-www-form-urlencoded";
}
};
UPDATE:
If your project uses Google's official volley as a module, you should add the following into JsonObjectRequest.java file:
public JsonObjectRequest(int method, String url, String requestBody,
Listener<JSONObject> listener, ErrorListener errorListener) {
super(method, url, requestBody, listener, errorListener);
}
UPDATE 2:
If you don't want to edit JsonObjectRequest.java file as I mentioned above, you can use the following code:
JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.POST, url, null, new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
// do something...
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
// do something...
}
}) {
#Override
public String getBodyContentType() {
return "application/x-www-form-urlencoded";
}
#Override
public byte[] getBody() {
// init parameters
Map<String, String> params = new HashMap<>();
params.put("grant_type", "password");
params.put("username", "bnk");
params.put("password", "bnk123");
// encode parameters (can use Uri.Builder as above)
String paramsEncoding = "UTF-8";
StringBuilder encodedParams = new StringBuilder();
try {
for (Map.Entry<String, String> entry : params.entrySet()) {
encodedParams.append(URLEncoder.encode(entry.getKey(), paramsEncoding));
encodedParams.append('=');
encodedParams.append(URLEncoder.encode(entry.getValue(), paramsEncoding));
encodedParams.append('&');
}
return encodedParams.toString().getBytes(paramsEncoding);
} catch (UnsupportedEncodingException uee) {
throw new RuntimeException("Encoding not supported: " + paramsEncoding, uee);
}
}
};
Hope it helps!