I've been stuck on this particular dilemma for some time, I have scoured the site and found some help, but not to my particular issue. I'm trying to connect to a website to extract JSON data from it. The host is what i'm not sure about:
DefaultHttpClient client = new DefaultHttpClient();
HttpHost targetHost = new HttpHost("www.wunderground.com", 80);
HttpGet httpGet = new HttpGet(urllink); // urllink is "api.wunderground.com/api/my_key/conditions/forecast/hourly/alerts/q/32256.json"
httpGet.setHeader("Accept", "application/json");
httpGet.setHeader("Content-type", "application/json");
HttpResponse response = client.execute(targetHost, httpGet);
HttpEntity entity = response.getEntity();
InputStream instream = entity.getContent();
BufferedReader reader = new BufferedReader(new InputStreamReader(instream));
StringBuilder stringBuilder = new StringBuilder();
String line = null;
try {
while ((line = reader.readLine()) != null) {
stringBuilder.append(line + "\n");
}
} catch (Exception e) {
// print stacktrace
return null;
} finally {
try {
instream.close();
} catch (Exception e) {
// print stacktrace
return null;
}
}
return stringBuilder.toString();
The host could either be www.wunderground.com or api.wunderground.com, but when I try either of them i get Unknown host exception.
I found the error. It was that I did not have the permission in the android manifest!
The call should be similar to:
http://api.wunderground.com/api/Your_Key/conditions/q/CA/San_Francisco.json
or as stated in the API,
GET http://api.wunderground.com/api/Your_Key/features/settings/q/query.format
Related
While trying to run a httppost at my client (Android application) side using the below code, but on my browser, i do receive just the JSON output of the expected data.
protected String doInBackground(String... params) {
DefaultHttpClient httpclient = new DefaultHttpClient(new BasicHttpParams());
HttpPost httppost = new HttpPost("http://192.168.43.229/thecee/mobile_app/the_lost.php");
// Depends on your web service
httppost.setHeader("Content-type", "application/json");
InputStream inputStream = null;
String result = null;
try {
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
inputStream = entity.getContent();
// json is UTF-8 by default
BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream, "UTF-8"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null)
{
sb.append(line + "\n");
}
result = sb.toString();
Log.d("The Content", result);
} catch (Exception e) {
// Oops
}
finally{
try {
if (inputStream != null) inputStream.close();
} catch (Exception squish) {
}
}
return result;
}
I am getting the error message below while trying to parse it.
03-31 04:29:50.463 18871-19413/com.example.ji.thecce D/The Content:
http://www.w3.org/1999/xhtml'>
The request failed
Response Error.
Technical description:502 Bad Gateway - Response Error, a
bad response was received from another proxy server or the destination
origin server.
03-31 04:29:50.466 18871-18871/com.example.ji.thecce
W/System.err: org.json.JSONException: Value
I will sincerely appreciate your response.
Thanks for your time.
public static String[] Webcall(String emailID) {
try {
URL url = new URL(AppConfig.URL + emailID);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("POST");
conn.setRequestProperty("Accept", "application/json");
conn.setRequestProperty("Authorization", "application/json");
conn.setRequestProperty("userEmailId", emailID);
if (conn.getResponseCode() != 200) {
throw new RuntimeException("Failed : HTTP error code : " + conn.getResponseCode());
}
BufferedReader br = new BufferedReader(new InputStreamReader((conn.getInputStream())));
String output;
System.out.println("Output from Server .... \n");
while ((output = br.readLine()) != null) {
System.out.println(output);
}
conn.disconnect();
org.json.JSONObject _jsonObject = new org.json.JSONObject(output);
org.json.JSONArray _jArray = _jsonObject.getJSONArray("manager");
String[] str = new String[_jArray.length()];
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
This is my code I am trying to call web service and get data.
But when I hit web service then I am getting below exception
Failed : HTTP error code : 404
Please suggest me where am doing wrong try to give solution for this .
The first thing is check url is it working on computer using postman or restclient and if it is working fine then tried to post using below code, this code is for posting data in json format using HttpPost you can use retrofit lib as Milad suggested.
public static String POST(String url, String email)
{
InputStream inputStream = null;
String result = "";
try {
// 1. create HttpClient
HttpClient httpclient = new DefaultHttpClient();
// 2. make POST request to the given URL
HttpPost httpPost = new HttpPost(url);
String json = "";
// 3. build jsonObject
JSONObject jsonObject = new JSONObject();
jsonObject.accumulate("email", email);
// 4. convert JSONObject to JSON to String
json = jsonObject.toString();
// 5. set json to StringEntity
StringEntity se = new StringEntity(json);
// 6. set httpPost Entity
httpPost.setEntity(se);
// 7. Set some headers to inform server about the type of the content
httpPost.setHeader("Accept", "application/json");
httpPost.setHeader("Content-type", "application/json");
// 8. Execute POST request to the given URL
HttpResponse httpResponse = httpclient.execute(httpPost);
// 9. receive response as inputStream
inputStream = httpResponse.getEntity().getContent();
// 10. convert inputstream to string
if(inputStream != null)
result = convertInputStreamToString(inputStream);
else
result = "Did not work!";
} catch (Exception e) {
Log.d("InputStream", e.getLocalizedMessage());
}
// 11. return result
return result;
}
private static String convertInputStreamToString(InputStream inputStream) throws IOException{
BufferedReader bufferedReader = new BufferedReader( new InputStreamReader(inputStream));
String line = "";
String result = "";
while((line = bufferedReader.readLine()) != null)
result += line;
inputStream.close();
return result;
}
I think u should try to re-check URL that you send request to.
follow the output error, code 404 that mean the URL is broken or dead link.
You can do the same by using jersy-client and jersy core.Here is the code snippet
private static void generateXML(String xmlName, String requestXML, String url)
{
try
{
Client client = Client.create();
WebResource webResource = client
.resource(url);
ClientResponse response = (ClientResponse)webResource.accept(new String[] { "application/xml" }).post(ClientResponse.class, requestXML);
if (response.getStatus() != 200) {
throw new RuntimeException("Failed : HTTP error code : " + response.getStatus());
}
String output = (String)response.getEntity(String.class);
PrintWriter writer = new PrintWriter(xmlName, "UTF-8");
writer.println(output);
writer.close();
}
catch (Exception e) {
try {
throw new CustomException("Rest-Client May Be Not Working From Your System");
} catch (CustomException e1) {
System.exit(1);
}
}
}
Call this method from your code with varibales.
I get Data from Json in android,date get and save in String Variable.but when use DecodeUrl its error:
Error: java.lang.IllegalArgumentException: Invalid % sequence at 40:
my code:
#SuppressLint("NewApi")
public String JsonReguest(String url) {
String json = "";
String result = "";
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder()
.permitAll().build();
StrictMode.setThreadPolicy(policy);
HttpClient httpclient = new DefaultHttpClient();
// Prepare a request object
HttpGet httpget = new HttpGet(url);
httpget.setHeader("Accept", "application/json");
httpget.setHeader("Content-Type", "application/json");
HttpResponse response;
try {
response = httpclient.execute(httpget);
response.setHeader("Content-Type","UTF-8");
HttpEntity entity = response.getEntity();
if (entity != null) {
InputStream instream = entity.getContent();
result = convertStreamToString(instream);
InputStream stream = new ByteArrayInputStream(result.getBytes("UTF-8"));
result = convertStreamToString(stream);
// String encode_url=URLEncoder.encode(result,"UTF-8");
// String decode_url=URLDecoder.decode(encode_url,"UTF-8");
//result=decode_url;
//String decodedUrl = URLDecoder.decode(result, "UTF-8");
result=URLDecoder.decode(result);
}
} catch (Exception e) {
Log.e("Error", e.toString());
}
return result;
}
public static String convertStreamToString(InputStream is) {
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line = null;
try {
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return sb.toString();
}
simple text of json :
{"CategoryID":11,"ParentID":0,"Title":"%u062E%u0648%u062F%u0631%u0648","PicAddress":""},{"CategoryID":16,"ParentID":0,"Title":"%u0627%u0645%u0644%u0627%u0643%20","PicAddress":""}
this line crashed : result=URLDecoder.decode(result);
how to Resolve Problems.
first decode specifing your encoding
String result = URLDecoder.decode(url, "UTF-8");
and then go to http://json.org/, scroll down and choose one of the supported json parsing Java libraries
As Selvin commented %uxxxx is not a standard Url encoded string , so it's obvious to get an error
you have 2 options:
Contact the service provider to fix her url encoded strings and use URLDecoder.decode in your code
write a custom decoder for such strings
P.S. ask your questions more clear to avoid getting negative points
I am receiving the below error message when I execute this code.
A resource was acquired at attached stack trace but never released. See java.io.Closeable for information on avoiding resource leaks.:
I am unable to identify the resource leak in the below code. I'll be greatful if anyone point out what actually I am doing wrong.
HttpPost request = new HttpPost(url);
StringBuilder sb = new StringBuilder();
StringEntity entity = new StringEntity(jsonString);
entity.setContentType("application/json;charset=UTF-8");
entity.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE, "application/json;charset=UTF-8"));
request.setHeader("Accept", "application/json");
request.setEntity(entity);
HttpResponse response = null;
DefaultHttpClient httpclient = getHttpClientImpl();
BufferedReader reader = null;
InputStream in = null;
try {
response = httpclient.execute(request);
in = response.getEntity().getContent();
reader = new BufferedReader(new InputStreamReader(in));
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line);
}
} catch (IOException e) {
e.printStackTrace();
} catch (Exception se) {
Log.e("Exception", se + "");
throw se;
} finally {
if (in != null)
in.close();
if (reader != null)
reader.close();
if (client != null && client.getConnectionManager() != null) {
client.getConnectionManager().shutdown();
}
}
return sb.toString();
I don't really see any issues with that code, but I recommend closing all the idle connections in the pool.
public abstract void closeIdleConnections (long idletime, TimeUnit tunit)
Furthermore, there are some known issues with the DefaultHttpClient when not entirely configured correctly. I recommend using the AndroidHttpClient as an implementation of the HttpClient interface. Visit following documentation for the explanation:
http://developer.android.com/reference/android/net/http/AndroidHttpClient.html
I am trying to read the buffer (android application) and set the value to my TextView 'httpStuff'. But i dont think i am getting some response from the URI.
I don't get any runtime errors. I tried many flavour of the same logic. Nothing seems to be working.
INTERNET permission is already set in the manifest. SdkVersion="15". Any help ?
HttpClient client = new DefaultHttpClient();
URI website = new URI("http://www.mybringback.com");
HttpGet request = new HttpGet();
request.setURI(website);
HttpResponse response = client.execute(request);
HttpEntity entity = response.getEntity();
InputStream is = entity.getContent();
BufferedReader in = new BufferedReader(new InputStreamReader(is));
httpStuf.setText( in.readLine());
I think you are missing the while loop and also, when you say only in.readLine(), may be it is returning you an empty line from the response, though it is having enough data.So make sure to read the reader entirely like this and check its contents.
while ((line = rd.readLine()) != null) {
httpStuf.setText(line+"\r\n");
}
Hope this will help you.
This code worked for me
InputStream is = response.getEntity().getContent();
String strResponse = inputStreamToString(is);
private String inputStreamToString(InputStream is)
{
String line = "";
StringBuilder total = new StringBuilder();
// Wrap a BufferedReader around the InputStream
BufferedReader rd = new BufferedReader(new InputStreamReader(is), 1024 * 4);
// Read response until the end
try
{
while ((line = rd.readLine()) != null)
{
total.append(line);
}
} catch (IOException e)
{
Log.e(TAG, "error build string" + e.getMessage());
}
// Return full string
return total.toString();
}
try to get the status code of response and Then you can compare with the (HTTP status)
int responseCode=response.getStatusLine().getStatusCode()
I am using this method to simply catch the HTTP response and it works fine for me.
public String httpGetResponse(String url) {
try {
Log.i("HTTP Request", "httpGet Request for : " + url);
DefaultHttpClient client = new DefaultHttpClient();
HttpGet get = new HttpGet(url);
//get.setHeader("Connection", "keep-alive");
HttpResponse response = client.execute(get);
InputStream is = response.getEntity().getContent();
BufferedReader bufferedReader = new BufferedReader(
new InputStreamReader(is));
StringBuilder str = new StringBuilder();
String line = null;
while ((line = bufferedReader.readLine()) != null) {
str.append(line + "\n");
}
return str.toString();
} catch (Exception e) {
Log.e("HTTP error", "Error in function httpGetResponse : "
+ e.getMessage());
return null;
}
}