Develop Reference

HttpConnectionUrl always return status code 307

I am trying to hit a web service. it is working fine with android 4.4 or android 5.X. but when i am trying to hit "http://inmotion-prod.cloudapp.net:145/service1.svc/json/GetCustomerUUID" using android 4.1.1 it always returning me 307 status code. but this url is working fine with android 4.4 or 5.x. i also tried to hit other url it is working fine on android 4.1.1.
so please tell me what is the problem
Log.i(TAG, url);
String response = null;
HttpURLConnection conn = null;
try {
URL webServiceUrl = new URL(url);
conn = (HttpURLConnection) webServiceUrl
.openConnection();
Log.i(TAG, "Connection open");
conn.setRequestMethod(GET);
conn.setConnectTimeout(CONNECTION_TIME_OUT);
conn.setRequestProperty(CONTENT_TYPE, contentType);
conn.setRequestProperty(ACCEPT_TYPE, acceptType);
conn.setDoInput(true);
conn.connect();
Log.i(TAG, "Connection Connected");
if (conn.getResponseCode() == HttpURLConnection.HTTP_OK && conn.getInputStream() != null) {
response = StreamUtility.convertStreamToString(conn.getInputStream());
conn.getInputStream().close();
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if (conn != null) {
conn.disconnect();
}
}
return response;
}

Replace your URL address with http://inmotion-prod.cloudapp.net:145/service1.svc/json/GetCustomerUUID/ (pay attention to / at the end). The response code will be 200.
UPDATE:
With your current URL address (http://inmotion-prod.cloudapp.net:145/service1.svc/json/GetCustomerUUID) without / at the end, you can use the following code:
String address = "http://inmotion-prod.cloudapp.net:145/service1.svc/json/GetCustomerUUID";
URL url = new URL(address);
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setInstanceFollowRedirects(false);
// if print out (debug or logging), you will see secondURL has / at the end
URL secondURL = new URL(urlConnection.getHeaderField("Location"));
HttpURLConnection urlConnection1 = (HttpURLConnection) secondURL.openConnection();
Then use urlConnection1.getResponseCode()
Hope it helps!

BNK's answer helped, I fixed it like this so that it also works on newer devices (location header was returned as null / empty!)
String headerLocation = httpsUrlConnection.getHeaderField("Location");
logger.debug("Location header: " + headerLocation);
// if the redirect URL ends with a "/" sign, but the original URL does not, it's probably the redirect bug
String originalURL = url.toString();
if (!TextUtils.isEmpty(headerLocation) && headerLocation.endsWith("/") && !originalURL.endsWith("/"))
{
logger.info("Redirect Location differs from original URL, create new connection to: " + headerLocation);
httpsUrlConnection = (HttpsURLConnection) new URL(headerLocation).openConnection();
// optional
httpsUrlConnection.setSSLSocketFactory(sslSocketFactory);
}

POST function for REST service returns empty response

I'm trying to do a post method for a REST service, but I'm not getting any response from server:
public JSONObject postValues (String strUrl, String strJsonArray) throws Exception{
JSONObject jsonObject = null;
URL url = new URL(strUrl);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setReadTimeout(10000);
conn.setConnectTimeout(15000);
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setRequestMethod("POST");
conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
strJsonArray = "data=" + strJsonArray;
Log.e("result",""+strJsonArray);
OutputStream os = conn.getOutputStream();
os.write(strJsonArray.getBytes());
os.flush();
conn.connect();
if (conn.getResponseCode() != 200) {
throw new RuntimeException("Failed : HTTP error code : "
+ conn.getResponseCode());
}
BufferedReader br = new BufferedReader(new InputStreamReader(
(conn.getInputStream())));
String output;
StringBuilder sb = new StringBuilder();
System.out.println("Output from Server .... \n");
while ((output = br.readLine()) != null) {
Log.e("output",output);
sb.append(output);
}
Log.e("output",sb.toString());
jsonObject = new JSONObject(sb.toString());
conn.disconnect();
return jsonObject;
}
When I see my logCat a get:
output {}
I know that the server is working right because I'm using the "advanced REST client" plugin of google chrome. If I call the URL manually (using the plugin of course)I get the desired answer:
{"message":"OK","code":200}
But if I try to use my function, my strJsonArray is inserted but I get an empty respond from server.
Is there anything wrong with my code?.

Everything looks good...
You could use Wireshark to capture the packets sent to and received from the server using an emulator and the chrome rest client. Then you can compare them and maybe find out what's wrong.
You could also check if theres something in the error stream (conn.getErrorStream()).

Android - Login HTTP works API 10 Only

To get some information, my app emulates the behaviour of a web browser. The log-in session of the target website has 3 steps:
Access the form (gives a cookie for authentication)
Send a POST request with all information
The server answers contains a link in the headers that indicates the address to go to
I have three functions for that, one that gets the page and extracts the session Cookie.
The second one extracts the form of this first page and puts the right infos.
The third one prepares the POST request, sends it, and read the Location in the headers.
It works fine... But with API 10 only.......
Does anyone know what has changed after API 10??
I've tried on Emulators with API 13 or more, and at the moment of sending the POST request, the server answers as if the Cookie given in the first page is not valid. (I get an answer Code of 200, and the login page... Instead of a 302 answer and the Location to follow).
I use the java.net CookieManager & CookieHandler
Here is the first function for example:
private String GetPageContent(String url) throws Exception {
URL obj = new URL(url);
conn = (HttpURLConnection) obj.openConnection();
// default is GET
conn.setRequestMethod("GET");
conn.setUseCaches(false);
// act like a browser
conn.setRequestProperty("User-Agent", USER_AGENT);
conn.setRequestProperty("Accept","text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
conn.setRequestProperty("Accept-Language", "fr-FR,fr;q=0.8,en-US;q=0.6,en;q=0.4");
conn.setRequestProperty("Accept-Charset", "ISO-8859-1,utf-8;q=0.7,*;q=0.3");
if (MainActivity.cookies != null) {
for (String cookie : MainActivity.cookies) {
conn.setRequestProperty("Cookie", cookie);
}
}
int responseCode = conn.getResponseCode();
System.out.println("\nSending 'GET' request to URL : " + url);
System.out.println("Response Code : " + responseCode);
BufferedReader in =
new BufferedReader(new InputStreamReader(conn.getInputStream()));
String inputLine;
StringBuffer response = new StringBuffer();
while ((inputLine = in.readLine()) != null) {
response.append(inputLine);
}
in.close();
// Get the response cookies
setCookies(conn.getHeaderFields().get("Set-Cookie"));
return response.toString();
}
And this is the third function (nothing special in the second one:
private void sendPost(String url, String postParams) throws Exception {
URL obj = new URL(url);
conn = (HttpURLConnection) obj.openConnection();
// Acts like a browser
conn.setUseCaches(false);
conn.setRequestMethod("POST");
conn.setRequestProperty("User-Agent", USER_AGENT);
conn.setRequestProperty("Accept",
"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
conn.setRequestProperty("Accept-Language", "fr-FR,fr;q=0.8,en-US;q=0.6,en;q=0.4");
for (String cookie : MainActivity.cookies) {
System.out.println("Adding Cookie: "+cookie);
conn.addRequestProperty("Cookie", cookie.split(";", 1)[0]);
}
conn.setRequestProperty("Connection", "keep-alive");
conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
conn.setRequestProperty("Content-Length", Integer.toString(postParams.length()));
// Update Progress bar -> 25
mProgression += 5;
msg = mHandler.obtainMessage(PROGRESSION, mProgression, 0);
mHandler.sendMessage(msg);
conn.setDoOutput(true);
conn.setDoInput(true);
// Send post request
DataOutputStream wr = new DataOutputStream(conn.getOutputStream());
wr.writeBytes(postParams);
wr.flush();
wr.close();
int responseCode = conn.getResponseCode();
System.out.println("\nSending 'POST' request to URL : " + url);
System.out.println("Post parameters : " + postParams);
System.out.println("Response Code : " + responseCode);
System.out.println("Attempt to get location");
// Get the location of the ticket in the ResponseHeader
setLocation(conn.getHeaderFields().get("Location"));
// Get the Cookie of the ResponseHeader AFTER sending credentials
setLoginCookies(conn.getHeaderFields().get("Set-Cookie"));
BufferedReader in =
new BufferedReader(new InputStreamReader(conn.getInputStream()));
String inputLine;
StringBuffer response = new StringBuffer();
while ((inputLine = in.readLine()) != null) {
response.append(inputLine);
}
in.close();
// System.out.println(response.toString());
}
There is no problem with the log cat, the third function can't go past the "get("Location")" since the server doesn't return any location...
Thanks to whoever takes time to answer that one...
Btw, it's my first app :)
Thanks again!

I think you should use a better client that will handle all the headers and the body by itself, you can use android built in HTTP client but it can not persist cookies, or you can use loopj async client that works great.
Actually I published a post that explained how we did it, you can read it here.

POSTing JSON and retrieving a response in Android

I am trying to post a JSON message to a site and to retrieve a JSON message back.
java.net.ProtocolException: method does not support a request body: POST
Does anyone know what is wrong? Thanks in advance
HttpURLConnection conn=null;
try{
URL url=new URL(urlString);
String userPassword = userName +":" + passWord;
byte[] bytes=Base64.encode(userPassword.getBytes(),Base64.DEFAULT);
String stringEncoding = new String(bytes, "UTF-8");
conn = (HttpURLConnection) url.openConnection();
conn.setReadTimeout(10000 /* milliseconds */);
conn.setConnectTimeout(15000 /* milliseconds */);
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setRequestMethod("POST");
conn.setRequestProperty ("Authorization", "Basic " + stringEncoding);
conn.setRequestProperty("Content-Type", "application/json;charset=utf-8");
Log.i("Net", "length="+conn.getContentLength());
Log.i("Net", "contentType="+conn.getContentType());
Log.i("Net", "content="+conn.getContent());
conn.connect();
}catch(Exception e){
Log.d("Url Formation Connection", e.toString());
}
//output{
try{
String requestString="{“ ";
wr = new OutputStreamWriter(conn.getOutputStream());
wr.write(requestString.toString());
wr.flush();
//input{
BufferedReader rd = null;
String response=" ";
is = conn.getInputStream();
rd = new BufferedReader(new InputStreamReader(is));
String line;
StringBuffer responseBuff = new StringBuffer();
while ((line = rd.readLine()) != null) {
// Process line...
responseBuff.append(line);
}
response = responseBuff.toString();
Log.d("response", response);
}catch(Exception e){
Log.d("buffer error", e.toString());
}finally {
if (is != null) {
try {
wr.close();
is.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

It could be that the server you're connecting to doesn't allow POST operations. I would try a GET request first, to see if you have permissions for that web service method.
Also, you could try your luck with a simpler HttpClient, although I haven't tested this solution myself: http://www.geekmind.net/2009/11/android-simple-httpclient-to.html

Just a guess but can you try setting:
conn.setDoOutput(false);
The documentation says: "Optionally upload a request body. Instances must be configured with setDoOutput(true) if they include a request body." HttpURLConnection
Since you do not have anything in your body, might as well set it to false.

The documentation Android has for setRequestMethod is minimal, however your error states that POST is not a valid method. Try using PUT instead:
conn.setRequestMethod("PUT");
Also see this post for any tweaks you may need to make.

Android POST data and COOKIES

I have a username as password which I need to send to a website as part of an android application (yes it is https), and once submitted to the seerver via POST, the server should return cookies. I need to be able to capture these cookies, and allow them to be accessed in a webview which I have settup.
How would I do this?
Thanks

You can call the setCookie function on the CookieManager instance, which you can get by calling a static method on it named getInstance.

Generally, in Java HttpURLConnection you can set / get a cookie this way (here is the whole connection process):
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
//set cookie. sCookie is my static cookie string
if(sCookie!=null && sCookie.length()>0){
conn.setRequestProperty("Cookie", sCookie);
}
// Send data
OutputStream os = conn.getOutputStream();
os.write(mData.getBytes());
os.flush();
os.close();
// Get the response!
int httpResponseCode = conn.getResponseCode();
if (httpResponseCode != HttpURLConnection.HTTP_OK){
throw new Exception("HTTP response code: "+httpResponseCode);
}
// Get the data and pass them to the XML parser
InputStream inputStream = conn.getInputStream();
Xml.parse(inputStream, Xml.Encoding.UTF_8, mSaxHandler);
inputStream.close();
//Get the cookie
String cookie = conn.getHeaderField("set-cookie");
if(cookie!=null && cookie.length()>0){
sCookie = cookie;
}
/* many cookies handling:
String responseHeaderName = null;
for (int i=1; (responseHeaderName = conn.getHeaderFieldKey(i))!=null; i++) {
if (responseHeaderName.equals("Set-Cookie")) {
String cookie = conn.getHeaderField(i);
}
}*/
conn.disconnect();