Develop Reference

Send Image with Parameters To Server Using HttpURLConnection in android

I am trying to upload two images along with some parameters to a server through my android application. After having searched online and following the instructions from here and here, as well as other sources, I have the following code:
String boundary = "***" + System.currentTimeMillis() + "***";
String twoHyphens = "--";
String crlf = "\r\n";
String output = "";
try {
HttpURLConnection httpUrlConnection = null;
URL url = new URL(myUrl);
httpUrlConnection = (HttpURLConnection) url.openConnection();
httpUrlConnection.setUseCaches(false);
httpUrlConnection.setDoInput(true);
httpUrlConnection.setDoOutput(true);
httpUrlConnection.setRequestMethod("POST");
httpUrlConnection.setRequestProperty("Connection", "Keep-Alive");
httpUrlConnection.setRequestProperty("Cache-Control", "no-cache");
httpUrlConnection.setRequestProperty("ENCTYPE", "multipart/form-data");
httpUrlConnection.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);
DataOutputStream request = new DataOutputStream(httpUrlConnection.getOutputStream());
request.writeBytes(twoHyphens + boundary + crlf);
// Convert and add first image
ByteArrayOutputStream bao1 = new ByteArrayOutputStream();
params[0].compress(Bitmap.CompressFormat.JPEG, 100, bao1);
byte[] ba1 = bao1.toByteArray();
request.writeBytes("Content-Disposition: form-data; name=\"image1\";filename=\"image1\"" + crlf);
request.writeBytes(crlf);
request.write(ba1);
request.writeBytes(crlf);
request.writeBytes(twoHyphens + boundary + crlf);
// Convert and add second image
ByteArrayOutputStream bao2 = new ByteArrayOutputStream();
params[1].compress(Bitmap.CompressFormat.JPEG, 100, bao2);
byte[] ba2 = bao2.toByteArray();
request.writeBytes("Content-Disposition: form-data; name=\"image2\";filename=\"image2\"" + crlf);
request.writeBytes(crlf);
request.write(ba2);
request.writeBytes(crlf);
request.writeBytes(twoHyphens + boundary + crlf);
request.writeBytes("Content-Disposition: form-data; name=\"username\"" + crlf);
request.writeBytes(crlf);
request.writeBytes(username);
request.writeBytes(crlf);
request.writeBytes(twoHyphens + boundary + twoHyphens);
request.writeBytes("Content-Disposition: form-data; name=\"datestr\"" + crlf);
request.writeBytes(crlf);
request.writeBytes(timeStampString);
request.writeBytes(crlf);
request.writeBytes(twoHyphens + boundary + twoHyphens);
request.flush();
request.close();
int responseCode = httpUrlConnection.getResponseCode();
if (responseCode == HttpsURLConnection.HTTP_OK) {
InputStream responseStream = new BufferedInputStream(httpUrlConnection.getInputStream());
BufferedReader responseStreamReader = new BufferedReader(new InputStreamReader(responseStream, Charset.forName("UTF-8")));
String line;
while ((line = responseStreamReader.readLine()) != null) {
output = line;
Log.d(TAG, line);
}
responseStreamReader.close();
}
httpUrlConnection.disconnect();
if (output == "") {
httpResultsReturned = false;
} else {
httpResultsReturned = true;
}
} catch (ProtocolException e) {
e.printStackTrace();
return "failed";
} catch (MalformedURLException e) {
e.printStackTrace();
return "failed";
} catch (IOException e) {
e.printStackTrace();
return "failed";
}
On the server side I try to access the data as follows:
<?php
if($_SERVER['REQUEST_METHOD'] === 'POST'){
$image1 = $_FILES['image1']['name'];
$image2 = $_FILES['image2']['name'];
$datestr= $_POST['datestr'];
$username= $_POST['username'];
}
?>
Eventually, both images are successfully transmitted, however I cannot send/receive the extra parameters. I receive the responses correctly, but throughout all the php code (there are parts that I omitted in this question), it seems like none of the parameters are sent/received.
In this question, AndroSco shared the solution that worked for him, but in his php file it looks like he only accesses the image and not the parameter...
Since I don't have a lot of experience on this field, I believe that there is probably something very obvious that I do incorrectly/don't do at all!
Any suggestions will be appreciated!
Thanks!

After much frustration, I found the bug in my code. After having imported the two images in the transmitted message and when I wanted to import the other parameters, I wrote the boundary incorrectly. Instead of adding this:
request.writeBytes(twoHyphens + boundary + crlf);
having a new line at the end, I wrote this:
request.writeBytes(twoHyphens + boundary + twoHyphens);
adding two hyphens at the end of the line.
After replacing the twoHyphens with crlf, everything worked nicely!

Server returned HTTP response code: 405

I need to fetch content from third party web application UI but after login, site redirects to many pages. I am not understanding how to retrieve data from last opened page.
Presently I am receiving in.readLine() method returns null if I use "OPTIONS" instead of GET.
If I use GET then error 405.
Rest Client shows the connection success through GET method and also redirecting it to desired page.
Please suggest.
I connected to url through URLConnection
HttpsURLConnection con = (HttpsURLConnection) new URL("https://***.com/MRcgi/MRhomepage.pl" + "?" + query).openConnection();
Complete code is as follows-
String charset = "UTF-8"; // Or in Java 7 and later, use the constant:
String USER = "*****";
String PROJECTID = "1";
String MRP = "1eba539717f66151f557b49fd7e8a8d28";//dynamically changes
String OPTION = "none";
String WRITECACHE = "1";
String FIRST_TIME_IN_FP = "1";
String FIRST_TIME_IN_PROJ = "1";
String dispatch_script = "MRlogin.pl";
String query = String
.format("USER=%s&PROJECTID=%s&MRP=%s&OPTION=%s&WRITECACHE=%s&FIRST_TIME_IN_FP=%s&FIRST_TIME_IN_PROJ=%s&dispatch_script=%s&",
URLEncoder.encode(USER, charset),
URLEncoder.encode(PROJECTID, charset),
URLEncoder.encode(MRP, charset),
URLEncoder.encode(OPTION, charset),
URLEncoder.encode(WRITECACHE, charset),
URLEncoder.encode(FIRST_TIME_IN_FP, charset),
URLEncoder.encode(FIRST_TIME_IN_PROJ, charset),
URLEncoder.encode(dispatch_script, charset));
HttpsURLConnection con = (HttpsURLConnection) new URL(
"https://***com/MRcgi/MRhomepage.pl" + "?" + query)
.openConnection();
String userPassword = "domain\\user:password";
String encoding = new String(
org.apache.commons.codec.binary.Base64
.encodeBase64(org.apache.commons.codec.binary.StringUtils
.getBytesUtf8(userPassword)));
System.out.println("----" + encoding);
con.setRequestMethod("GET");
con.setRequestProperty("Content-Type", "text/plain");
con.setRequestProperty("charset", "UTF-8");
con.setRequestProperty("Authorization", "Basic " + encoding);
USER=user&MRP=15c6ca083c2f75a73e0fbbd2832290f29&PROJECTID=1&USECACHEURL=1&IGNORE_REAL_ACTIVE_TIME=1";
con.setDoOutput(true);
DataOutputStream wr = new DataOutputStream(con.getOutputStream());
//wr.writeBytes(urlParameters);
wr.flush();
wr.close();
int responseCode = con.getResponseCode();
System.out.println("Response Code : " + responseCode);
BufferedReader in = new BufferedReader(new InputStreamReader(
con.getInputStream()));
String inputLine;
StringBuffer response = new StringBuffer();
System.out.println("-----" + in.readLine());
while ((inputLine = in.readLine()) != null) {
response.append(inputLine);
}
in.close();
System.out.println(response.toString());
}

setDoOutput(true) is used for POST and PUT requests. If it is false then it is for using GET requests.
Its not required in my code, so I simply commented setDoOutput(true), and request went as GET
Also below url helped me a lot in understanding it-
What exactly does URLConnection.setDoOutput() affect?

Uploading a bitmap from android to a server results in an unopenable file

So I've used some code from stackoverflow that uses HttpURLConnection to send a bitmap from Android to my local WAMP server. The only issue I have is that the data being sent can't be open by an image viewer. I have a feeling it has to do with the method that I am sending the data.
HttpURLConnection httpUrlConnection = null;
URL url = new URL(ip+urls[0]);
httpUrlConnection = (HttpURLConnection) url.openConnection();
httpUrlConnection.setUseCaches(false);
httpUrlConnection.setDoOutput(true);
httpUrlConnection.setRequestMethod("POST");
httpUrlConnection.setRequestProperty("Connection", "Keep-Alive");
httpUrlConnection.setRequestProperty("Cache-Control", "no-cache");
httpUrlConnection.setRequestProperty(
"Content-Type", "multipart/form-data;boundary=" + this.boundary);
DataOutputStream request = new DataOutputStream(
httpUrlConnection.getOutputStream());
request.writeBytes(this.twoHyphens + this.boundary + this.crlf);
request.writeBytes("Content-Disposition: form-data; name=\"" +
this.attachmentName + "\";filename=\"" +
this.attachmentFileName + "\"" + this.crlf);
request.writeBytes(this.crlf);
int bytes = bitmap.getByteCount();
Log.e("bitmap bytes",Integer.toString(bytes));
ByteBuffer buffer = ByteBuffer.allocate(bytes);
bitmap.copyPixelsToBuffer(buffer);
byte[] pixels = buffer.array();
request.write(pixels);
request.writeBytes(this.crlf);
request.writeBytes(this.twoHyphens + this.boundary +
this.twoHyphens + this.crlf);
request.flush();
request.close();
//Response
InputStream responseStream = new
BufferedInputStream(httpUrlConnection.getInputStream());
BufferedReader responseStreamReader =
new BufferedReader(new InputStreamReader(responseStream));
String line = "";
StringBuilder stringBuilder = new StringBuilder();
while ((line = responseStreamReader.readLine()) != null) {
stringBuilder.append(line).append("\n");
}
responseStreamReader.close();
String response = stringBuilder.toString();
responseStream.close();
httpUrlConnection.disconnect();
return response;
I have checked the file sizes and they are the same. I plan on sending the image back to my android device in the future, however I wanted to make sure the uploading part worked first. If the file is supposed to be unopenable and I'm understanding the code wrong I apologize for the wasted time.

Sending an HTTP POST request through the android emulator doesn't work

I'm running a tomcat servlet on my local machine and an Android emulator with an app that makes a post request to the servlet. The code for the POST is below (without exceptions and the like):
String strUrl = "http://10.0.2.2:8080/DeviceDiscoveryServer/server/devices/";
Device device = Device.getUniqueInstance();
urlParameters += URLEncoder.encode("user", "UTF-8") + "=" + URLEncoder.encode(device.getUser(), "UTF-8");
urlParameters += "&" + URLEncoder.encode("port", "UTF-8") + "=" + URLEncoder.encode(new Integer(Device.PORT).toString(), "UTF-8");
urlParameters += "&" + URLEncoder.encode("address", "UTF-8") + "=" + URLEncoder.encode(device.getAddress().getHostAddress(), "UTF-8");
URL url = new URL(strUrl);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoOutput(true);
connection.setRequestMethod("POST");
OutputStreamWriter wr = new OutputStreamWriter(connection.getOutputStream());
wr.write(urlParameters);
wr.flush();
wr.close();
Whenever this code is executed, the servlet isn't called. However if I change the type of the request to 'GET' and don't write anything to the outputstream, the servlet gets called and everything works fine. Am I just not making the POST correctly or is there some other error?

try the following code, it may help u
try
{
String argUrl =
"";
String requestXml = "";
URL url = new URL( argUrl );
URLConnection con = url.openConnection();
System.out.println("STRING" + requestXml);
// specify that we will send output and accept input
con.setDoInput(true);
con.setDoOutput(true);
con.setConnectTimeout( 20000 ); // long timeout, but not infinite
con.setReadTimeout( 20000 );
con.setUseCaches (false);
con.setDefaultUseCaches (false);
// tell the web server what we are sending
con.setRequestProperty ( "Content-Type", "text/xml" );
OutputStreamWriter writer = new OutputStreamWriter( con.getOutputStream() );
writer.write( requestXml );
writer.flush();
writer.close();
// reading the response
InputStreamReader reader = new InputStreamReader( con.getInputStream() );
StringBuilder buf = new StringBuilder();
char[] cbuf = new char[ 2048 ];
int num;
while ( -1 != (num=reader.read( cbuf )))
{
buf.append( cbuf, 0, num );
}
String result = buf.toString();
System.err.println( "\nResponse from server after POST:\n" + result );
}
catch( Throwable t )
{
t.printStackTrace( System.out );
}

Out of curiosity I tried getting the response code for my request:
int responseCode = connection.getResponseCode();
System.out.println(responseCode);
This actually made the request go through and I got 200. I checked my Tomcat logs and the request finally got handled. I guess doing url.openConnection() and writing to the OutputStream isn't enough.

Posting to a user's wall using the POST request and graph API

I am new to facebook app development and i have been trying to post a simple message on the wall of the user.i have managed to get the access token .Here is the code for the POST request.I am using java servlets
String data = URLEncoder.encode("access_token", "UTF-8") + "=" + URLEncoder.encode(accessToken, "UTF-8");
data += "&" + URLEncoder.encode("message", "UTF-8") + "=" + URLEncoder.encode("finally", "UTF-8");
out.println("data is\n"+data);
// Send data
String u="https://graph.facebook.com/me/feed";
URL urls = new URL(u);
URLConnection conn = url.openConnection();
conn.setDoOutput(true);
OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());
wr.write(data);
wr.flush();
Well this code is not working and i can not post on the wall.Any suggestion as to where i might be wrong?

I'm pretty sure that it's because you don't specify the application/x-www-form-urlencoded content type, try this:
URLConnection connection = new URL("https://graph.facebook.com/me/feed").openConnection();
connection.setDoOutput(true);
connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
DataOutputStream out = new DataOutputStream(connection.getOutputStream());
out.writeBytes(data);
out.flush();
out.close()
Edit
Ok, so there are two more things that might cause this problem:
You also need to specify the content length.
You might need to read the response to make it count..
This code was tested and it works:
StringBuffer buffer = new StringBuffer();
buffer.append("access_token").append('=').append(ACCESS_TOKEN);
buffer.append('&').append("message=").append('=').append("YO!");
String content = buffer.toString();
URLConnection connection = new URL("https://graph.facebook.com/me/feed").openConnection();
connection.setDoOutput(true);
connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
connection.setRequestProperty("Content-Length", Integer.toString(content.length()));
DataOutputStream out = new DataOutputStream(connection.getOutputStream());
out.writeBytes(content);
out.flush();
out.close();
BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
String inputLine;
while ((inputLine = in.readLine()) != null) {
System.out.println(inputLine);
}
in.close();