I am using the following code to read json data from url , but it has fixed length of 500 for the json data. How can I ensure that all the data(variable length) is always read.
private String downloadUrl(String myurl) throws IOException {
InputStream is = null;
// Only display the first 500 characters of the retrieved
// web page content.
int len = 500;
try {
URL url = new URL(myurl);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setReadTimeout(10000 /* milliseconds */);
conn.setConnectTimeout(15000 /* milliseconds */);
conn.setRequestMethod("GET");
conn.setDoInput(true);
// Starts the query
conn.connect();
int response = conn.getResponseCode();
Log.d(DEBUG_TAG, "The response is: " + response);
is = conn.getInputStream();
// Convert the InputStream into a string
String contentAsString = readIt(is, len);
return contentAsString;
// Makes sure that the InputStream is closed after the app is
// finished using it.
} finally {
if (is != null) {
is.close();
}
}
}
public String readIt(InputStream stream, int len) throws IOException, UnsupportedEncodingException {
Reader reader = null;
reader = new InputStreamReader(stream, "UTF-8");
char[] buffer = new char[len];
reader.read(buffer);
return new String(buffer);
}
Thanks.
Reference
InputStream in = new BufferedInputStream(conn.getInputStream());
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
StringBuilder sb = new StringBuilder();
String newLine = System.getProperty("line.separator");
String line;
while ((line = reader.readLine()) != null) {
sb.append(line + newLine);
}
String result = sb.toString();
byte[] data = new byte[1024];
int bytesRead = inputstream.read(data);
while(bytesRead != -1) {
doSomethingWithData(data, bytesRead);
bytesRead = inputstream.read(data);
}
Related
I am getting pdf file in response of API, I am using HttpUrlConnection (Android Java). I am unable to get pdf file from the response.
My code to get response is:
URL url = new URL(RESULT_DOWNLOAD_URL);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoOutput(true);
connection.setDoInput(true);
connection.setAllowUserInteraction(false);
connection.setRequestProperty("Connection", "Keep-Alive");
connection.setConnectTimeout(90000);
connection.setReadTimeout(90000);
connection.setRequestMethod("POST");
connection.setRequestProperty("Content-Type", "application/pdf");
connection.setRequestProperty("Accept", "application/pdf");
connection.setRequestProperty("access-token", resultAccessToken);
connection.setChunkedStreamingMode(1024);
connection.connect();
JSONObject jsonObject = new JSONObject();
jsonObject.put("reference",reference);
DataOutputStream os = new DataOutputStream(connection.getOutputStream());
byte[] payload = jsonObject.toString().getBytes(StandardCharsets.UTF_8);
int progressPercent = 0;
int offset = 0;
int bufferLength = payload.length / 100;
while(progressPercent < 100) {
os.write(payload, offset, bufferLength);
offset += bufferLength;
++progressPercent;
this.publishProgress(progressPercent);
}
os.write(payload, offset, payload.length % 100);
os.flush();
os.close();
int responseCode = connection.getResponseCode();
if ((responseCode >= HttpURLConnection.HTTP_OK)
&& responseCode < 300) {
inputStream = connection.getInputStream();
resultResponse = inputStreamToString(inputStream);
Log.d(TAG, "Response : " + resultResponse);
}
private static String inputStreamToString(InputStream inputStream) throws IOException {
StringBuilder out = new StringBuilder();
BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
String line;
while ((line = reader.readLine()) != null) {
out.append(line);
}
reader.close();
return out.toString();
}
Response is like(for understanding, I converted it in string form):
I want to download file from this response, response is returning pdf file.
Add this code...
int responseCode = connection.getResponseCode();
if ((responseCode >= HttpURLConnection.HTTP_OK)
&& responseCode < 300) {
inputStream = connection.getInputStream();
String FolderPath = "Images/"
File folder = null;
if(Build.VERSION.SDK_INT >= 29){ //Build.VERSION_CODES.R
folder = new File(context.getFilesDir() + "/" + FolderPath);
}else {
folder = new File(
Environment.getExternalStorageDirectory() + "/"
+ FolderPath);
}
if (!folder.exists())
folder.mkdirs();
String FilePath = folder.getAbsolutePath() + "/"
+ Path.substring(Path.lastIndexOf('/') + 1);
OutputStream output = new FileOutputStream(FilePath, false);
byte data[] = new byte[8192];
int count = -1;
while ((count = inputStream.read(data)) != -1) {
output.write(data, 0, count);
}
// flushing output
output.flush();
// closing streams
output.close();
inputStream.close();
}
I want to upload Image to Perticular Url(www.myUrl.com/myFolderName/) through android and retrieve the address of that url.
Here is my code
class SaveFile extends AsyncTask<String,String,String>
{
FileInputStream fileInputStream;
HttpURLConnection connection;
URL url;
DataOutputStream outputStream;
int bytesRead,bytesAvailable,bufferSize;
byte[] buffer;
int maxBufferSize = 1 * 1024 * 1024;
File selectedFile = new File(selectedImagePath);
//selectedImagePath = path of Image in phonememory
#Override
protected String doInBackground(String... params)
{
Log.v(TAG,"Image path is " + selectedImagePath);
try
{
fileInputStream = new FileInputStream(selectedFile);
url = new URL(SEND_IMAGE);
connection= (HttpURLConnection)url.openConnection();
Log.v(TAG,"connection established");
connection.setDoOutput(true);
connection.setDoInput(true);
connection.setRequestMethod("POST");
connection.setRequestProperty("Connection","Keep-Alive");
connection.setRequestProperty("ENCTYPE","multipart/form-data");
connection.setRequestProperty("Content-Type","multipart/form-data;boundary=*****");
//connection.setRequestProperty("image1",selectedImagePath);
//connection.setRequestProperty("user_id","1");
outputStream = new DataOutputStream(connection.getOutputStream());
outputStream.writeBytes("--*****\r\n");
outputStream.writeBytes("Content-Disposition:form-data;name=\"uploaded_file\";filename=\""+selectedImagePath+"\""+"\r\n");
outputStream.writeBytes("\r\n");
//outputStream.writeBytes("--*****\r\n");
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable,maxBufferSize);
buffer = new byte[bufferSize];
bytesRead = fileInputStream.read(buffer,0,bufferSize);
while (bytesRead>0)
{
outputStream.write(buffer,0,bufferSize);
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable,maxBufferSize);
bytesRead = fileInputStream.read(buffer,0,bufferSize);
}
outputStream.writeBytes("\r\n");
outputStream.writeBytes("--*****--\r\n");
int serverResponseCode = connection.getResponseCode();
String serverResponseMessage = connection.getResponseMessage();
if(serverResponseCode == HttpURLConnection.HTTP_OK) {
String line;
StringBuilder sb = new StringBuilder();
BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
while ((line = reader.readLine()) != null) {
sb.append(line);
}
Log.v(TAG,"Response is " +sb.toString());
}
Log.v("UploadImage", "Server Response is: " + serverResponseMessage + ": " + serverResponseCode);
fileInputStream.close();
outputStream.flush();
outputStream.close();
}
catch (Exception e)
{
Log.v("UploadImage"," " + e.toString());
}
return null;
}
#Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
}
}
but I am getting serverResponse 404
I tried solutions like Uploading Image to Server - Android but not worked.
I searched a lot.but couldnt find solution
Please Help!!
I want to say that this maybe a server error. 404 in most cases is an error that says, "you have used wrong url". Check whether this url is correct.try to upload your data in your browser.
I am getting long string data from server via socket and there is reading issue .
Data is around 10 MB .
private String createSocketConnection() throws IOException {
String result = "";
{
String host = ServiceUrlManager.socketIP;
int port = ServiceUrlManager.socketPort;
InetAddress address = InetAddress.getByName(host);
socket = new Socket(address, port);
socket.setSoTimeout(timeOut);
Log.d(TAG, ":::::Socket Connection " + socket.isConnected());
DataOutputStream dataOutputStream = new DataOutputStream(socket.getOutputStream());
dataOutputStream.write(createMSG());
dataOutputStream.write(sockecData);
dataOutputStream.flush();
//Read data from server connection
InputStream inputStream = socket.getInputStream();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte buffer[] = new byte[1024];
for(int s; (s=inputStream.read(buffer)) != -1; )
{
baos.write(buffer, 0, s);
}
String data = ISOUtil.hexString(baos.toByteArray());
result = data.substring(0, baos.toByteArray().length); // response message
Log.d(TAG, "::::Response " + result);
}
return result;
}
BufferedReader in =
new BufferedReader(
new InputStreamReader(inputStream.getInputStream()));
StringBuilder sb= new StringBuilder();
while(br.readLine!=null){
sb.append(br.readLine());
}
This URL return & open text file directly, i just want to read its content how can i do it
http://translate.google.com.tw/translate_a/t?client=t&hl=en&sl=en&tl=gu&ie=UTF-8&oe=UTF-8&multires=1&oc=1&otf=2&ssel=0&tsel=0&sc=1&q=this+is+translate+demo
i have tried
public static String translate(String sl, String tl, String text) throws IOException{
// fetch
URL url = new URL("https://translate.google.com.tw/translate_a/t?client=t&hl=en&sl=" +
sl + "&tl=" + tl + "&ie=UTF-8&oe=UTF-8&multires=1&oc=1&otf=2&ssel=0&tsel=0&sc=1&q=" +
URLEncoder.encode(text, "UTF-8"));
Log.d("URL", ":: "+url);
URLConnection urlConnection = url.openConnection();
urlConnection.setRequestProperty("User-Agent", "Something Else");
Log.d("URL", ":: After opening Connection");
BufferedReader br = new BufferedReader(new InputStreamReader(urlConnection.getInputStream()));
Log.d("URL", ":: br "+br);
String result = br.readLine();
br.close();
// parse
Log.d("URL", ":: "+result);
result = result.substring(2, result.indexOf("]]") + 1);
StringBuilder sb = new StringBuilder();
String[] splits = result.split("(?<!\\\\)\"");
for(int i = 1; i < splits.length; i += 8)
sb.append(splits[i]);
return sb.toString().replace("\\n", "\n").replaceAll("\\\\(.)", "$1");
}
If Your Url directly open's the Text File then this code reads the TextFile and print's also as follows:
public class URLReader {
public static void main(String[] args) throws Exception {
URL oracle = new URL("http://www.oracle.com/");
BufferedReader in = new BufferedReader(
new InputStreamReader(oracle.openStream()));
String inputLine;
while ((inputLine = in.readLine()) != null)
System.out.println(inputLine);
in.close();
}
}
i am working in android. i want to integrate foursquare with my application.
for functioning of check in at a place. i am using this following code:-
URL url = new URL("https://api.foursquare.com/v2/checkins/add/");
URLConnection conn = url.openConnection();
conn.setDoOutput(true);
OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());
wr.write(data);
wr.flush();
BufferedReader rd = new BufferedReader(new
InputStreamReader(conn.getInputStream()));
String line;
while ((line = rd.readLine()) != null) {
}
but this is generating file not found exception. please help me what mistake i have done.
thank you in advance.
Try with following approach
read and write data from URL
void readAndWriteFromWeb(){
//make connection
URL url = new URL("https://api.foursquare.com/v2/checkins/add/");
HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
httpURLConnection.setRequestMethod("POST");
httpURLConnection.setDoOutput(true);
httpURLConnection.setDoInput(true);
httpURLConnection.setAllowUserInteraction(true);
httpURLConnection.setRequestProperty("Connection", "keep-alive");
httpURLConnection.setRequestProperty("ConnectionTimeout", "12000");
httpURLConnection.setRequestProperty("Content-Length", "" + request.length);
//write data
OutputStream out = httpURLConnection.getOutputStream();
out.write(request);
out.flush();
//Log.e("Request URL "+url, "Request Data "+request);
//read data
InputStream inputStream = httpURLConnection.getInputStream();
int length = httpURLConnection.getContentLength();
//Log.e("Content Length", "" + length);
int readLength = 0;
int chunkSize = 1024;
int readBytes = 0;
byte[] data = new byte[chunkSize];
StringBuilder builder = new StringBuilder();
while((readBytes = inputStream.read(data)) != -1){
builder.append(new String(data,0,readBytes).trim());
readLength += readBytes;
//Release the memory.
data = null;
//Check the remaining length
if((length - readLength) < chunkSize){
if((length - readLength) == 0){
break;
}
data = new byte[((length) - readLength)];
}else{
data = new byte[chunkSize];
}
}
}