I'm trying to read a website but strangely it returns only part of it. It just ends in the middle of section.
I tried using the setChunkedStreamingMode method but it didn't change anything.
HttpURLConnection connection = ((HttpURLConnection) new URL(url).openConnection());
connection.setDoOutput(true);
connection.setDoInput(true);
connection.setInstanceFollowRedirects(false);
connection.setRequestMethod("POST");
// I write some data...
String content = readInputStream(connection.getInputStream());
ReadInputStream method:
private static String readInputStream(InputStream in) throws IOException {
int len = 0;
byte[] buffer = new byte[10000];
ByteArrayOutputStream byteArray = new ByteArrayOutputStream();
while((len = in.read(buffer)) != -1) {
byteArray.write(buffer,0, len);
}
in.close();
return new String(byteArray.toByteArray());
}
Is there some sort of limit of data?
there is no problem with HttpUrlConnection
try this:
StringBuilder stringBuilder = new StringBuilder();
BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
String line;
while ((line = reader.readLine()) != null) {
stringBuilder.append(line);
}
inputStream.close();
Related
I want to upload the image to the server.
I got the bitmap of the image and encoded it to base64.
I convert the base64 of the image to a string using the encodeToString method.
I post the string to PHP using httpurlconnection. Actually, I got the string from PHP which is not the whole string. I don`t get any error. Please give me feedback!
public String httpURLConnectionPost(final String urlString){
String result="";
try {
URL url = new URL(urlString);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("POST");
connection.setDoOutput(true);
connection.setDoInput(true);
connection.setUseCaches(false);
connection.connect();
Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.download);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos);
byte[] imageBytes = baos.toByteArray();
String encodedImage = Base64.encodeToString(imageBytes, Base64.NO_CLOSE);
String body= "image="+encodedImage;
Log.d("serverPostData","body = " +body);
BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(connection.getOutputStream(), "UTF-8"));
writer.write(body);
writer.close();
int responseCode = connection.getResponseCode();
if(responseCode == HttpURLConnection.HTTP_OK){
InputStream inputStream = connection.getInputStream();
StringBuilder stringBuilder = new StringBuilder();
String line;
BufferedReader br = new BufferedReader(new InputStreamReader(inputStream));
while ((line = br.readLine()) != null) {
stringBuilder .append(line);
}
result = stringBuilder .toString();
}
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
The php got the string and decode it.
<?php
include("mysqli_connect.php");
$image= $_POST['image'];
$a = uniqid() ;
$ImagePath = "good/$a.JPEG";
$ServerURL = "https://172.30.10.1/$ImagePath";
$InsertSQL = "INSERT INTO Photoshop(photo) VALUES('$ServerURL')" ;
if(mysqli_query($connect, $InsertSQL)){
file_put_contents($ImagePath,base64_decode($image));
echo $image;
}else{
echo "failed";
}
mysqli_close();
?>
Try this to convert image to base64:
Uri uri = data.getData();
Bitmap bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), uri);
String encodedImageData = getEncoded64ImageStringFromBitmap(bitmap);
Now pass the data in API:
JsonObject data1 = new JsonObject();
data1.addProperty("imageData", "data:image/png;base64," + encodedImageData);
Now set ImageBitmap:
image.setImageBitmap(bitmap);
Here is the method:
private String getEncoded64ImageStringFromBitmap(Bitmap bitmap) {
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 70, stream);
byte[] byteFormat = stream.toByteArray();
// get the base 64 string
String imgString = Base64.encodeToString(byteFormat, Base64.NO_WRAP);
return imgString;
}
And for HttpUrlConnection try this...
jsonObject = new JSONObject();
jsonObject.put("imageString", encodedImage);
String data = jsonObject.toString();
String yourURL = "yourphpfileurl";
URL url = new URL(yourURL);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoOutput(true);
connection.setDoInput(true);
connection.setRequestMethod("POST");
connection.setFixedLengthStreamingMode(data.getBytes().length);
connection.setRequestProperty("Content-Type", "application/json;charset=UTF-8");
OutputStream out = new BufferedOutputStream(connection.getOutputStream());
BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(out, "UTF-8"));
writer.write(data);
writer.flush();
writer.close();
out.close();
connection.connect();
InputStream in = new BufferedInputStream(connection.getInputStream());
BufferedReader reader = new BufferedReader(new InputStreamReader(
in, "UTF-8"));
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line);
}
in.close();
String result = sb.toString();
connection.disconnect();
Hope this one will work for you...
I solved my probelm that the base64 need to replace empty to "+".
<?php
include("mysqli_connect.php");
$image= $_POST['image'];
$change = str_replace(" ","+",$image);
$a = uniqid() ;
$ImagePath = "good/$a.JPEG";
$ServerURL = "https://172.30.10.1/$ImagePath";
$InsertSQL = "INSERT INTO Photoshop(photo) VALUES('$ServerURL')" ;
if(mysqli_query($connect, $InsertSQL)){
file_put_contents($ImagePath,base64_decode($change ));
echo $image;
}else{
echo "failed";
}
mysqli_close();
?>
I trying to read a json file from dbpedia and parse it. But the code that i have wrote can not correctly read the whole json file and for that reason parsing error comes. Here is my code for reading and parsing...
URL url=new URL("http://dbpedia.org/data3/assembly.json");
BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream()));
String inputLine="asdf";
while (( in.readLine()) != null)
{
if (inputLine=="asdf")
inputLine=in.readLine();
else
inputLine+=in.readLine();
//System.out.println(inputLine);
}
System.out.println(inputLine);
Object obj = parser.parse(inputLine);
JSONObject jsonObject = (JSONObject) obj;
You can create a helper method to read the file from url:
private static String readUrl(String urlString) throws Exception {
BufferedReader reader = null;
try {
URL url = new URL(urlString);
reader = new BufferedReader(new InputStreamReader(url.openStream()));
StringBuffer buffer = new StringBuffer();
int read;
char[] chars = new char[1024];
while ((read = reader.read(chars)) != -1) {
buffer.append(chars, 0, read);
}
return buffer.toString();
} finally {
if (reader != null)
reader.close();
}
}
then you can call the method like this
try {
JSONObject json = new JSONObject(readUrl("http://dbpedia.org/data3/assembly.json"));
...
} catch (JSONException e) {
e.printStackTrace();
}
It's up to you, if you need StringBuffer or StringBuilder
I'm reading a response from an HttpURLConnection object to a String like so:
HttpURLConnection conn = ...;
BufferedReader rd = new BufferedReader(new InputStreamReader(
conn.getInputStream());
StringBuilder sb = ...;
String line = "";
while ((line = rd.readLine()) != null) {
sb.append(line);
}
String asString = sb.toString();
If I want to read instead to a byte array first, then convert that byte array to a String, what's the right way to do it?
InputStream is = conn.getInputStream();
ByteArrayOutputStream baos = new ByteArrayOutputStream(16384);
byte[] buf = new byte[512];
while (true) {
int len = in.read(buf);
if (len == -1) {
break;
}
baos.write(buf, 0, len);
}
byte[] out = baos.toByteArray();
// as a string:
String asString = new String(out);
but I'm not specifying the character in either case - are the two String outputs at the end of the examples equivalent?
Thanks
I want to pass a java application sent a string that is a json,it isn't get this json in servlet, how do I do, who can help me?
This is my servlet code:
public void service(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException {
BufferedInputStream in = new BufferedInputStream(req.getInputStream());
byte[] data = null;
byte[] bts = new byte[1024];
int index;
while ((index = in.read(bts)) >= 0) {
if (data == null) {
data = new byte[index];
System.arraycopy(bts, 0, data, 0, index);
}
else {
byte[] tmp = data;
data = new byte[tmp.length + index];
System.arraycopy(tmp, 0, data, 0, tmp.length);
System.arraycopy(bts, 0, data, tmp.length, index);
}
}
String json = new String(data);
System.out.print(json);
}
and this is my java application:
String _url = "http://localhost:8080/jsf/test";
URL url = null;
HttpURLConnection urlconn = null;
String json = URLEncoder.encode(JSONObject.fromObject(req)
.toString(), "UTF-8");
url = new URL(_url);
urlconn = (HttpURLConnection) url.openConnection();
urlconn.setRequestMethod("POST");
urlconn.setDoOutput(true);
urlconn.setDoInput(true);
OutputStream out = urlconn.getOutputStream();
out.write(json.getBytes("UTF-8"));
out.flush();
out.close();
BufferedReader rd = new BufferedReader(new InputStreamReader(
urlconn.getInputStream(), "UTF-8"));
StringBuffer sb = new StringBuffer();
int ch;
while ((ch = rd.read()) > -1) {
sb.append((char) ch);
}
System.out.println(sb);
rd.close();
You should write json data to outputStream as out.write(json.getBytes()); . See the complete code below:
String _url = "http://localhost:8080/jsf/test";
URL url = new URL(_url);
String json = "[{\"id\":\"DFAB8108D69642EBBD461160B4519B0F\",\"name\":\"name1\"},{\"id\":\"B048B2521A5619DCE0440003BA11CFDA\",\"name\":\"name2\"}]";
HttpURLConnection urlconn = (HttpURLConnection) url.openConnection();
urlconn.setRequestMethod("POST");
urlconn.setDoOutput(true);
OutputStream out = urlconn.getOutputStream();
out.write(json.getBytes());
out.flush();
out.close();
BufferedReader rd = new BufferedReader(new InputStreamReader(
urlconn.getInputStream(), "UTF-8"));
StringBuffer sb = new StringBuffer();
int ch;
while ((ch = rd.read()) > -1) {
sb.append((char) ch);
}
System.out.println(sb.toString());
rd.close();
Try something like this
String _url = "http://localhost:8080/jsf/test";
URL url = new URL(_url);
String json = "[{\"id\":\"DFAB8108D69642EBBD461160B4519B0F\",\"name\":\"name1\"},{\"id\":\"B048B2521A5619DCE0440003BA11CFDA\",\"name\":\"name2\"}]";
HttpURLConnection urlconn = (HttpURLConnection) url.openConnection();
urlconn .setDoOutput(true);
urlconn .setRequestProperty("Content-Type", "application/json");
urlconn .setRequestProperty("Accept", "application/json");
urlconn .setRequestMethod("POST");
urlconn .connect();
OutputStream os = httpcon.getOutputStream();
os.write((json.getBytes("UTF-8"));
os.close();
i want to download a csv file from a internet url.
I have tried every code that i can find online and not able to download.
URL google = new URL("myurl");
ReadableByteChannel rbc = Channels.newChannel(google.openStream());
FileOutputStream fos = new FileOutputStream("C://excelsheet.csv");
fos.getChannel().transferFrom(rbc, 0, 1 << 24);
This code is not working
I used this function , it is not working too.
public stacvoid saveUrl(String filename, String urlString) throws MalformedURLException, IOException
{
BufferedInputStream in = null;
FileOutputStream fout = null;
try
{
in = new BufferedInputStream(new URL(urlString).openStream());
fout = new FileOutputStream(filename);
byte data[] = new byte[1024];
int count;
while ((count = in.read(data, 0, 1024)) != -1)
{
fout.write(data, 0, count);
}
}
finally
{
if (in != null)
in.close();
if (fout != null)
fout.close();
}
}
I tried a simple input stream on my url , that doesn't work too.
URL oracle = new URL("myurl");
URLConnection yc = oracle.openConnection();
BufferedReader br = new BufferedReader(new InputStreamReader(
yc.getInputStream()));
Now instead of myurl , if i type any other url , the bufferedreader does get data.
If I enter myurl in a browser i get a popup to save or download the csv file.
So the problem is not with an incorrrect "myurl"
Is it possible that the servelet/code running on "myurl" actually checks if the request is coming from a browser and only then sends the data.
Thanks everyone . Used httpclient and it works for me. Heres the code that downloads an csv file , saves it locally and then reads it and parses all the tokens.
HttpClient httpclient = new DefaultHttpClient();
HttpGet httpget = new HttpGet("your url to download");
HttpResponse response = httpclient.execute(httpget);
System.out.println(response.getProtocolVersion());
System.out.println(response.getStatusLine().getStatusCode());
System.out.println(response.getStatusLine().getReasonPhrase());
System.out.println(response.getStatusLine().toString());
HttpEntity entity = response.getEntity();
if (entity != null) {
FileOutputStream fos = new java.io.FileOutputStream("C://excelsheet.csv");
entity.writeTo(fos);
fos.close();
}
//create BufferedReader to read csv file
BufferedReader br = new BufferedReader( new FileReader("C://excelsheet.csv"));
String strLine = "";
StringTokenizer st = null;
int lineNumber = 0, tokenNumber = 0;
while( (strLine = br.readLine()) != null)
{
lineNumber++;
//break comma separated line using ","
st = new StringTokenizer(strLine, ",");
while(st.hasMoreTokens())
{
//display csv values
tokenNumber++;
System.out.println("Line # " + lineNumber +
", Token # " + tokenNumber
+ ", Token : "+ st.nextToken());
}
//reset token number
tokenNumber = 0;
}
}
catch (Exception e) {
System.out.println("insdie the catch part");
System.out.println(e.toString());
}
Have you tried the HttpClient lib?
I used it sometime ago to download a set of exams from a site automatically.