I have the following code for make a post to an url an retrieve the response as a String. But I'd like to get also the HTTP response code (404,503, etc). Where can I recover it?
I've tried with the methods offered by the HttpReponse class but didn't find it.
Thanks
public static String post(String url, List<BasicNameValuePair> postvalues) {
try {
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(url);
if ((postvalues == null)) {
postvalues = new ArrayList<BasicNameValuePair>();
}
httppost.setEntity(new UrlEncodedFormEntity(postvalues, "UTF-8"));
// Execute HTTP Post Request
HttpResponse response = httpclient.execute(httppost);
return requestToString(response);
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
private static String requestToString(HttpResponse response) {
String result = "";
try {
InputStream in = response.getEntity().getContent();
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
StringBuilder str = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
str.append(line + "\n");
}
in.close();
result = str.toString();
} catch (Exception ex) {
result = "Error";
}
return result;
}
You can modify your code like this:
//...
HttpResponse response = httpclient.execute(httppost);
if(response.getStatusLine().getStatusCode() == HttpStatus.SC_OK){
//edit: there is already function for this
return EntityUtils.toString(response.getEntity(), "UTF-8");
} else {
//Houston we have a problem
//we should do something with bad http status
return null;
}
EDIT: just one more thing ...
instead of requestToString(..); you can use EntityUtils.toString(..);
Have you tried this?
// Execute HTTP Post Request
HttpResponse response = httpclient.execute(httppost);
response.getStatusLine().getStatusCode();
Have you tried the following?
response.getStatusLine().getStatusCode()
Related
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 want to get a String return type for a http response I get for http post request i trigger, but my return variable is giving error
"message cannot be resolved to a variable"
Subsequently I have to convert that return string value to a json string data.
here is my code....
public String sendPOST(String _postData) {
CloseableHttpClient httpClient = HttpClients.createDefault();
HttpPost httpPost = new HttpPost(POST_URL);
httpPost.addHeader("User-Agent", USER_AGENT);
StringEntity entity = new StringEntity(_postData, HTTP.UTF_8);
entity.setContentType("application/json");
httpPost.setEntity(entity);
CloseableHttpResponse httpResponse;
try {
httpResponse = httpClient.execute(httpPost);
System.out.println("POST Response Status:: " + httpResponse.getStatusLine().getStatusCode());
BufferedReader reader = new BufferedReader(new InputStreamReader(httpResponse.getEntity().getContent()));
String inputLine;
StringBuffer response = new StringBuffer();
while ((inputLine = reader.readLine()) != null) {
response.append(inputLine);
String message = org.apache.commons.io.IOUtils.toString(reader);
String type = message.getClass().getName();
System.out.println(type);
System.out.println("Final : " + message);
}
reader.close();
// print result
System.out.println(response.toString());
httpClient.close();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return message;
}
Because local "message" variable you are using outside of loop. Add global "message" variable, That should solve your problem.
I am trying to do an httpPost into a webservice. I want to send a list as an array. Here is what I 've done so far.
public Response searchMessages(#QueryParam("tags") List<String> tags, #QueryParam("senders") List<String> senders, #QueryParam("api_keys") List<String> apiKeys) throws Exception
{Iterator<String> tagsIt = tags.iterator();
Iterator<String> sendersIt = senders.iterator();
Iterator<String> apiKeysIt = apiKeys.iterator();
CloseableHttpClient httpClient = null;
HttpPost httpPost =null;
List<NameValuePair> nvps=null;
CloseableHttpResponse response=null;
InputStream in=null;
String myResponse = "";
try
{
httpClient = HttpClients.createDefault();
httpPost = new HttpPost(url);
while(tagsIt.hasNext())
{
String keyIt = tagsIt.next();
nvps.add(new BasicNameValuePair("tags",hashMap.get(keyIt)));
}
while(sendersIt.hasNext())
{
String keySend = sendersIt.next();
nvps.add(new BasicNameValuePair("senders",hashMap.get(keySend)));
}
while(apiKeysIt.hasNext())
{
String keySend = sendersIt.next();
nvps.add(new BasicNameValuePair("apiKeys",hashMap.get(keySend)));
}
//System.out.println(key+" "+hashMap.get(key));
httpPost.setEntity(new UrlEncodedFormEntity(nvps,Consts.UTF_8));
response = httpClient.execute(httpPost);
BufferedReader buffer=null;
try{
//System.out.println(response.toString());
in= response.getEntity().getContent();
buffer = new BufferedReader(new InputStreamReader(in));
String s = "";
while ((s = buffer.readLine()) != null) {
myResponse += s+"\n";
}
status= response.getStatusLine().getStatusCode();
resp = Response.status(status).entity(myResponse).build();
}
catch(Exception e)
{
e.printStackTrace();
}
}
finally
{
in.close();
response.close();
httpClient.close();
}
My issue is that I get a null pointer exception in in.close() line.
I do not know where my mistake is.Please help.
I have an app android that in an AsyncTask make 2 get request to a servlet.
I want to retrieve a String that contains a simple response.
This is my AsyncTask:
protected String doInBackground(Void... params) {
return uploadFile();
}
#SuppressWarnings("deprecation")
private String uploadFile() {
String responseString = null;
String responseStr = null;
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(Config.FILE_UPLOAD_URL);
try {
AndroidMultiPartEntity entity = new AndroidMultiPartEntity(
new ProgressListener() {
#Override
public void transferred(long num) {
publishProgress((int) ((num / (float) totalSize) * 100));
}
});
File sourceFile = new File(filePath);
// Adding file data to http body
entity.addPart("image", new FileBody(sourceFile));
totalSize = entity.getContentLength();
httppost.setEntity(entity);
// Making server call
HttpResponse response = httpclient.execute(httppost);
HttpEntity r_entity = response.getEntity();
int statusCode = response.getStatusLine().getStatusCode();
if (statusCode == 200) {
// Server response
responseString = EntityUtils.toString(r_entity);
try {
HttpClient client = new DefaultHttpClient();
URI getURL = new URI("http://192.168.1.101:8080/MusaServlet?collection="+collection+"&name="+filename);
Log.i("QUERY",getURL.getQuery());
HttpGet get = new HttpGet(getURL);
HttpResponse responseGet = client.execute(get);
HttpEntity resEntityGet = responseGet.getEntity();
if (resEntityGet != null) {
Log.i("GET RESPONSE",EntityUtils.toString(resEntityGet));
}
responseStr = EntityUtils.toString(responseGet.getEntity());
} catch (Exception e) {
e.printStackTrace();
}
} else {
responseString = "Error occurred! Http Status Code: "
+ statusCode;
}
} catch (ClientProtocolException e) {
responseString = e.toString();
} catch (IOException e) {
responseString = e.toString();
}
return responseStr;
}
Instead the servlet code is:
PrintWriter out = response.getWriter();
out.println("HELLO STUPID APP!");
However the dialog showed by app is empty! No words!
What's the problem guys?
Thank's
At first check your GET request status code as
responseGet.getStatusLine().getStatusCode();
If is giving number 200 then GET is successfull.
Now if is 200 then you will get the response what you have sent by following code
HttpEntity resEntityGet = responseGet.getEntity();
and then
String result;
if(resEntityGet !=null ){
result= EntityUtils.toString(resEntityGet);
}
Now the most important thing is once you perform responseGet.getEntity() the data of GET response will be passed to the variable.. you assign.. and later on calling responseGet.getEntity() will always return empty...
That may be the reason you are getting empty response in your dialog
EDIT:
Ok I have modified my code and playing with logcat I'm sure that the responseCode is not 200.
What is the problem now? -.-"
I constructed an HttpClient, and set timeout parameters.
the code is like this:
while(bufferedinputstream.read()!=-1){
post.setEntity(multipartEntity);
HttpResponse response = httpClient.excute(post);
}
it worked fine for the first several request, and then somehow the response is not returned, and no exception or timeout exception was thrown. Anyone has any idea what's happening?
since you re not getting any errors or exceptions (do you print them out?), you could check the satusCode of your response. Maybe it helps.
(overridden method from my AsyncTask)
protected String doInBackground(String... arg) {
String url = arg[0]; // Added this line
//...
Log.i(DEBUG_TAG, "URL CALL -> " + url);
HttpClient client = new DefaultHttpClient();
HttpPost post = new HttpPost(url);
String mResponse = "";
try {
List<NameValuePair> params = new LinkedList<NameValuePair>();
//...
post.setEntity(new UrlEncodedFormEntity(params));
HttpResponse mHTTPResponse = client.execute(post);
StatusLine statusLine = mHTTPResponse.getStatusLine();
int statusCode = statusLine.getStatusCode();
if (statusCode == 200) { //
//get response
BufferedReader rd = new BufferedReader(new InputStreamReader(
mHTTPResponse.getEntity().getContent()));
StringBuilder builder = new StringBuilder();
String aux = "";
while ((aux = rd.readLine()) != null) {
builder.append(aux);
}
mResponse = builder.toString();
} else {
//cancel task and show error
Log.e(DEBUG_TAG, "ERROR in Request:" + statusCode);
this.cancel(true);
}
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return mResponse;
}