I am using eclipse ADT for my android development. let me explain my problem. I can receive the response from my server api, the problem is, the data is very huge and am unable to display entire response in my logcat. I used AsynTask for getting response.
DoinBackground method
getBookingResults = ServerConnection.getbookings(
BookingsActivity.this, Utils.URL + "users/"
+ "123145/" + "subscribed");
This is my Get() in separate class
public static String getData(Context ctx, String uri) {
BufferedReader reader = null;
StringBuilder sb = null;
try {
Log.d("Serverconnection URL ", uri);
URL url = new URL(uri);
HttpURLConnection con = (HttpURLConnection) url.openConnection();
con.setConnectTimeout(200000);
// save status code
Utils.statusCode = con.getResponseCode();
// String responseBody = EntityUtils.toString(response.getEntity());
sb = new StringBuilder();
reader = new BufferedReader(new InputStreamReader(
con.getInputStream()));
String line;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
Log.d("server connection getData", "" + sb.toString());
return sb.toString();
} catch (SocketTimeoutException e) {
Log.d("server connection getData Error ", "" + e);
} catch (IOException e) {
e.printStackTrace();
return " ";
} finally {
if (reader != null) {
try {
reader.close();
} catch (IOException e) {
e.printStackTrace();
return " ";
}
}
}
return sb.toString();
}
When i am checking the response string in my logcat is shows string length 11743. The logcat is not displaying entire response
Help me out to handle huge data response
Thanks in advance
Thing is that you cannot blindly allocate all the data from server otherwise risk of OOM is very high. You should use technique similar to what android suggests with list, keep in memory only those elements visible to user. In other words, first you have to figure out what the size is or expect that size may be huge. Then load data chunk by chunk to some UI element and implement some kind of "load by scroll". In case you cannot load from the net as you scroll, perhaps due to nature of the connection, then you should load chunk by chunk and save the data to local store. And then display it chunk by chunk as described above. This is how I would do it. Sorry, not exactly the answer you look for.
I need to upload a file to server. If i use the "curl -i -F filedata=#"PATH TO FILE" http://█.199.166.14/audiostream " it return a 200 OK code (Or may be this command incorrect) .
But when I use java function
public String send()
{
try {
url = "http://█.199.166.14/audiostream";
File file = new File(Environment.getExternalStorageDirectory().getAbsolutePath(), "test.pcm");
try {
Log.d("transmission", "started");
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(url);
ResponseHandler Rh = new BasicResponseHandler();
InputStreamEntity reqEntity = new InputStreamEntity(new FileInputStream(file), -1);
reqEntity.setContentType("binary/octet-stream");
reqEntity.setChunked(true); // Send in multiple parts if needed
httppost.setEntity(reqEntity);
HttpResponse response = httpclient.execute(httppost);
response.getEntity().getContentLength();
StringBuilder sb = new StringBuilder();
try {
BufferedReader reader =
new BufferedReader(new InputStreamReader(response.getEntity().getContent()), 65728);
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line);
}
}
catch (IOException e) { e.printStackTrace(); }
catch (Exception e) { e.printStackTrace(); }
Log.d("Response", sb.toString());
Log.d("Response", "StatusLine : " + response.getStatusLine() + " Entity: " + response.getEntity()+ " Locate: " + response.getLocale() + " " + Rh);
return sb.toString();
} catch (Exception e) {
// show error
Log.d ("Error", e.toString());
return e.toString();
}
}
catch (Exception e)
{
Log.d ("Error", e.toString());
return e.toString();
}
}
It's return 400 Bad request.
I'm also not sure that server proceed correctly my attempts to upload this file, but I can't check it.
From the error received its likely a bad formatted HTTP query. If audiostream is a php, write the full link.
Also it seems that there might be a wrong/bad encoded char at "http://█.199.166.14/audiostream, the link should be http://(IP or DNS)/(rest of URL)(the URI)
You should erase the link, then manually writte it again.
If those didnt fix the issue, its also possible that the Server (or its path equipment) might be blocking you. Check from the Access Log and the security rules of its accesses, that you are not blocked (some routers may block users from performing repeated querys as a sort of anti "Denial of Service" measure)
I m implementing a REST based HTTP server in Android. The server responds for GET, DELETE and POST requests. Two android devices communicate using HTTP Post (I m using a service, where a device keeps listening on a port and post to next device and this keeps going on).
I m testing the GET and DELETE using Mozilla Poster. Should I add a separate socket/port to handle the same? Because when I try now, sometimes I get timeout error or no response found. However, I am able to see server response in Logcat window. Please help me.
Code to handle GET request:
if(method.equals("GET"))
{
if(checkFileExisting())
{
BufferedReader reader = new BufferedReader(new FileReader(new File(getFilesDir()+File.separator+"script.json")));
String read;
StringBuilder builder = new StringBuilder("");
while((read = reader.readLine()) != null)
{
builder.append(read);
}
String JSONContents = builder.toString();
reader.close();
JSONObject jsonObject;
try {
jsonObject = new JSONObject(JSONContents);
String name = jsonObject.getString("name");
JSONObject stateObject = jsonObject.getJSONObject("state");
String stateValue = stateObject.getString("value");
if(name.equals(target))
{
HttpResponse response = new BasicHttpResponse(HttpVersion.HTTP_1_1, 200, "OK");
response.setEntity(new StringEntity("State is:" + stateValue));
conn.sendResponseHeader(response);
conn.sendResponseEntity(response);
}
else
{
HttpResponse response = new BasicHttpResponse(HttpVersion.HTTP_1_1, 404, "Not Found");
response.setEntity(new StringEntity("The requested resource " + target + " could not be found due to mismatch!!"));
conn.sendResponseHeader(response);
conn.sendResponseEntity(response);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
else
{
HttpResponse response = new BasicHttpResponse(HttpVersion.HTTP_1_1, 404, "Not Found");
response.setEntity(new StringEntity("The requested resource " + target + " could not be found!!"));
conn.sendResponseHeader(response);
conn.sendResponseEntity(response);
}
}
The link http://www.integratingstuff.com/2011/10/24/adding-a-webserver-to-an-android-app/ has a very good example. I missed conn.close() in my code.
What I try to do
Hello Guys, I'm trying to create an App in which I can view the Orders the Customers gave to me. For this I created a interface on my server, on which I can send post/get/set request's. The response of the Server is in JSON-Format. (For your Information atm only dummydata is filled in)
Now when I do a get request from my app to the server, I get a response from it but it isn't complete about the half of the response I should get isn't there! :( But when I open the URL with the Get-Request in my browser, I get the full response.
Question
Like you see it can't be a server-based problem, because I also tryed via 'curl' to do this get requst, and allways got the full response.
In my App i work with the DefaultHttpClient, so I tought the Problem simply could be that there's a limit for the response but I didn't found it.
So where can I change this "response-size" and what else could be the problem why I don't get the full response! Some good code-snippets or whatever you can imagine would help!
Down here you'll find the code of the Methode which does the Get-Request.
Code
If you need more Code, just write it in the comments!
getOrders()
public void getOrders() {
Log.d("DataHandlerService", "Aufträge werden geladen");
Thread t = new Thread() {
public void run() {
SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
String userid = settings.getString("userid", "uid");
Log.d("DataHandlerService", userid);
// Download-URL
String URL = "http://api.i-v-o.ch/users/" + userid
+ "/assignments.json";
Log.d("Request-URL", URL);
DefaultHttpClient client = new DefaultHttpClient();
HttpResponse response;
try {
HttpGet request = new HttpGet();
request.setURI(new URI(URL));
request.addHeader("Content-Type",
"application/x-www-form-urlencoded");
response = client.execute(request);
int statuscode = response.getStatusLine().getStatusCode();
switch (statuscode) {
case 200:
if (response != null) {
StringBuilder sb = new StringBuilder();
BufferedReader rd = new BufferedReader(
new InputStreamReader(response.getEntity()
.getContent()));
String line;
while ((line = rd.readLine()) != null) {
sb.append(line + "\n");
}
String result;
result = sb.toString();
Log.d("Response", result);
JSONReader(result); //here the json will be generated
}
break;
case 500:
// Error-Handling
break;
}
} catch (Exception e) {
e.printStackTrace();
Log.e("DataHandler", "URLConnection-Error" + e);
}
}
};
t.start();
}
Here's the Response you asked for, like you see a part of it isn't there!:
[{"created_at":"2012-01-06T17:10:00Z","end_datetime":"2008-03-25T13:00:00Z","id":2127,"start_datetime":"2008-03-25T13:00:00Z","updated_at":"2012-01-06T17:10:00Z","title":"2127 Foobar","referee_forename":"Peter","referee_surname":"Gertsch","referee_full_name":"Peter Gertsch","category_title":"Installation - SAT","status_title":"Closed - Erfolgreich"},{"created_at":"2012-01-06T17:10:03Z","end_datetime":"2008-04-04T12:00:00Z","id":2134,"start_datetime":"2008-04-04T12:00:00Z","updated_at":"2012-01-06T17:10:03Z","title":"2134 Foobar","referee_forename":"Daniel","referee_surname":"Brunner","referee_full_name":"Daniel Brunner","category_title":"Installation - SAT","status_title":"Closed - Erfolgreich"},{"created_at":"2012-01-06T17:10:03Z","end_datetime":"2008-04-07T12:00:00Z","id":2136,"start_datetime":"2008-04-07T12:00:00Z","updated_at":"2012-01-06T17:10:03Z","title":"2136 Foobar","referee_forename":"Andreas","referee_surname":"Lutz","referee_full_name":"Andreas Lutz","category_title":"Installation - SAT","status_title":"Closed - technisches problem"},{"created_at":"2012-01-06T17:10:08Z","end_datetime":"2008-05-22T07:00:00Z","id":2144,"start_datetime":"2008-05-22T07:00:00Z","updated_at":"2012-01-06T17:10:08Z","title":"2144 Foobar","referee_forename":"Pascal","referee_surname":"Pichand","referee_full_name":"Pascal Pichand","category_title":"Installation - SAT","status_title":"Closed - Erfolgreich"},{"created_at":"2012-01-06T17:10:08Z","end_datetime":"2008-05-15T07:00:00Z","id":2145,"start_datetime":"2008-05-15T07:00:00Z","updated_at":"2012-01-06T17:10:08Z","title":"2145 Foobar","referee_forename":"Hansruedi","referee_surname":"W\u00fcrgler","referee_full_name":"Hansruedi W\u00fcrgler","category_title":"Installation - SAT","status_title":"Closed - Erfolgreich"},{"created_at":"2012-01-06T17:10:08Z","end_datetime":"2008-05-26T08:00:00Z","id":2146,"start_datetime":"2008-05-26T08:00:00Z","updated_at":"2012-01-06T17:10:08Z","title":"2146 Foobar","referee_forename":"Martina","referee_surname":"Issler","referee_full_name":"Martina Issler","category_title":"Installation - SAT","status_title":"Closed - Erfolgreich"},{"created_at":"2012-01-06T17:10:08Z","end_datetime":"2008-06-03T14:00:00Z","id":2147,"start_datetime":"2008-06-03T14:00:00Z","updated_at":"2012-01-06T17:10:08Z","title":"2147 Foobar","referee_forename":"Matthias ","referee_surname":"Kuhn","referee_full_name":"Matthias Kuhn","category_title":"Installation - SAT","status_title":"Closed - Erfolgreich"},{"created_at":"2012-01-06T17:10:12Z","end_datetime":"2008-07-07T07:00:00Z","id":2157,"start_datetime":"2008-07-07T07:00:00Z","updated_at":"2012-01-06T17:10:12Z","title":"2157 Foobar","referee_forename":"Eberhard","referee_surname":"Polatzek","referee_full_name":"Eberhard Polatzek","category_title":"Installation - SAT","status_title":"Closed - Erfolgreich"},{"created_at":"2012-01-06T17:10:13Z","end_datetime":"2008-07-11T08:00:00Z","id":2161,"start_datetime":"2008-07-11T08:00:00Z","updated_at":"2012-01-06T17:10:13Z","title":"2161 Foobar","referee_forename":"Magali","referee_surname":"Bohin","referee_full_name":"Magali Bohin","category_title":"Installation - SAT","status_title":"Closed - Erfolgreich"},{"created_at":"2012-01-06T17:10:14Z","end_datetime":"2008-07-25T08:30:00Z","id":2163,"start_datetime":"2008-07-25T08:30:00Z","updated_at":"2012-01-06T17:10:14Z","title":"2163 Foobar","referee_forename":"(Hotel Centrum Griesalp)","referee_surname":"Haltenegg Betriebs AG","referee_full_name":"(Hotel Centrum Griesalp) Haltenegg Betriebs AG","category_title":"Installation - SAT","status_title":"Closed - Erfolgreich"},{"created_at":"2012-01-06T17:10:16Z","end_datetime":"2008-08-07T09:00:00Z","id":2170,"start_datetime":"2008-08-07T09:00:00Z","updated_at":"2012-01-06T17:10:16Z","title":"2170 Foobar","referee_forename":".","referee_surname":"SAC Hollandiah\u00fctte","referee_full_name":". SAC Hollandiah\u00fctte","category_title":"Installation - SAT","status_title":"Closed - Erfolgreich"},{"created_at":"2012-01-06T17:10:16Z","end_datetime":"2009-05-07T06:30:00Z","i
Ah. Right, the problem isn't your connection or anything like that. Your service is returning an array - not an object - thus you should parse it like this:
HttpResponse response = ...
if (.. validate status ..) {
JSONArray array = new JSONArray(HttpEntityUtils.toString(response.getEntity()));
// Your JSONArray is now ready to play with.
}
And consider using an AsyncTask instead of a Thread, like this:
class AssignmentsTask extends AsyncTask<String, Void, JSONArray> {
#Override
protected JSONArray doInBackground(String... params) {
final String url = "http://api.i-v-o.ch/users/" + params[0]
+ "/assignments.json";
try {
HttpResponse response = mClient.execute(new HttpGet(url));
if (response.getStatusLine().getStatusCode() == 200) {
return new JSONArray(EntityUtils.toString(response.getEntity()));
} else {
Log.w(TAG, "Error receiving assignments for " + params[0] + ", " + response.getStatusLine());
}
} catch (ClientProtocolException e) {
Log.w(TAG, "Proto: Error fetching assignments for " + params[0], e);
} catch (IOException e) {
e.printStackTrace();
Log.w(TAG, "IO: Error reading assignments for " + params[0], e);
} catch (ParseException e) {
Log.w(TAG, "Parse: Error parsing assignments for " + params[0], e);
} catch (JSONException e) {
Log.w(TAG, "JSON: Error parsing JSON for " + params[0], e);
}
return null;
}
#Override
protected void onPostExecute(JSONArray result) {
// Stuff that handles the resulting JSONObject on
// the UI-thread goes here (i.e. update View:s)
// result is null if the operation failed
}
}
And to retrieve an order for the user "116":
new AssignmentsTask().execute("116");
The response size should be given by the web server you are contacting. You could read the response size using :
httpResponse.getEntity().getContentLength()
Also, what can happen is a connection timeout, making it impossible for the client to receive all data of the response. In that case, try using a timeout that is long enough to be sure you get all the data.
If your json is too large, then it's not a good idea in a mobile context to expect all the data coming in a single request, you could then have to design a web server that could give you chunks of a response, you would then require the first chunk, then the a different one, etc..
Usually, the http protocole's partial content is the answer for that problem.
i have implemented a try block that does some network requests but whenever it throws an exception such has a Timeout one, the android application displays a message Saying
Sorry: The application has stopped unexpectedy, please try again.
the only option presented to the user is a force close button. i want to catch this exception and simple display my own error message and let the user try the connection again instead of the user having to close the app.
Here is the code below:
all i want to do is return null after a exception is caught and what ever class that calls this will do it its own error handling like this:
if(postRequest == null){ display error message}
private HttpResponseObject PostRequest() {
//int response = 0;
String responseBody = "";
HttpResponseObject response = new HttpResponseObject();
try {
Log.d(TAG, "IN POST_REQUEST_METHOD");
Log.d(TAG, "URL : " + url);
httpclient = new DefaultHttpClient();
httpclient.getParams().setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, 1);
//httpclient.getParams().setParameter(CoreConnectionPNames.SO_TIMEOUT, 10000);
httpclient.getParams().setParameter(CoreConnectionPNames.SO_TIMEOUT, 5);
Log.d(TAG, "httpclient.getParams().setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, 5000);");
post = new HttpPost(url);
// ClientConnectionRequest connRequest = new ManagedClientConnection();
// post.setConnectionRequest((ClientConnectionRequest) connRequest.getConnection(3000, TimeUnit.MILLISECONDS));
ByteArrayEntity entity = new ByteArrayEntity(data.getBytes());
entity.setChunked(true);
post.setEntity(new StringEntity(data));
HttpResponse httpResponse = httpclient.execute(post);
HttpEntity resEntity = httpResponse.getEntity();
if (resEntity != null) {
// indicate that the content of this entity is no longer
// required
response.setResponseBody(EntityUtils.toString(resEntity));
Header[] header = httpResponse.getAllHeaders();
Log.d(TAG, "httpResponse.getAllHeaders() = " + header[0].getName());
response.setResponseHeader(httpResponse.getAllHeaders().toString());
resEntity.consumeContent();
}
// release all recources from the httpClient object
httpclient.getConnectionManager().shutdown();
response.setResponseCode(httpResponse.getStatusLine().getStatusCode() ) ;
Log.d(TAG, "responseBody = " + response.getResponseBody());
Log.d(TAG, "response code = " + response.getResponseCode());
Log.d(TAG, "response header = " + response.getResponseHeader());
return response;
} catch (SocketTimeoutException e) {
e.printStackTrace();
Log.d(TAG, "SocketTimeoutException e = " + e.toString());
return null;
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
Log.d(TAG, "IOException e = " + e.toString());
return null;
}
}
The Force Close dialog appears due to an uncaught exception. Since you are not throwing a checked exception yourself, this is due to a runtime exception, most probably a Null Pointer one. This means that there is bug in your code that causes this and not a network error.
In order to find the problem you need to know the type of the Exception being thrown and its message. You can see these at the LogCat - if you are using Eclipse it is available in the debug perspective.