outputstream

My goal is to send a TCP packet with empty data field, in order to test the socket with the remote machine. I am using the OutputStream class's method of write(byte[] b). my attempt: outClient = ClientSocket.getOutputStream(); outClient.write(("").getBytes()); Doing so, the packet never show up on the wire. It works fine if "" is replaced by " " or any non-zero string. I tried jpcap, which worked with me, but didn't serve my goal. I thought of extending the OutputStream class, and implementing my own OutputStream.write method. But this is beyond my knowledge. Please give me advice if someone

I'm writing a Play! application which exposes a REST API allowing users to generate PDF reports. I'm constrained by the requirements to use a old Java API to do the actual report generation. That library has a method generate(OutputStream out, ...) , i.e. it takes a java.io.OutputStream where it writes the resulting report. My problem is integrating this with Play/Akka to serve the contents in Chunked Encoding. To that end, I need to create an Enumerator[Array[Byte]] which somehow contains the OutputStream from the Java library. I have come up with a working solution that uses a

I am doing two succssive calls to my servlet from android in this way: //FIRST CONNECTION URL url = new URL("http://172.16.32.160:8080/xyz/check_availability"); HttpURLConnection connection =(HttpURLConnection) url.openConnection(); connection.setDoOutput(true); ObjectOutputStream out=new ObjectOutputStream(connection.getOutputStream()); String a="xya"; String b="xsw"; out.writeObject(a); out.flush(); ObjectInputStream in=new ObjectInputStream(connection.getInputStream()); String s=(String) in.readObject(); in.close(); out.close(); Toast.makeText(getApplicationContext(), "1", Toast.LENGTH_LONG

I am working in a legacy java application, In many files, socket and streams are used, where sockets are getting closed but not the streams, is this necessary to close all the streams before closing the socket. because I am getting "too many open files error", is this error because of not closing the streams..... closing the socket will automatically close the streams also? From the Socket Javadoc : Closing this socket will also close the socket's InputStream and OutputStream . So generally speaking, closing the socket should be enough to close both streams it created. Your "too many open

I'm using the following code to close an InputStream and an OutputStream from a connection to a server: try { if (mInputStream != null) { mInputStream.close(); mInputStream = null; } if (mOutputStream != null) { mOutputStream.close(); mOutputStream = null; } } catch (IOException e) { e.printStackTrace(); } However, the streams are not closing, they are still alive. If I connect again there are two different InputStreams. No exception is being caught in the catch section. What am I doing wrong? Two problems with your posted code: The .close() calls should be handled in a finally block. This way

Is it possible to close the output stream of a PHP script? I have a script which needs to do some post processing, but during and after the post processing it won't send any data to the client anymore, so I'd like to close the connection before the post processing. Edit: In my application I have a cache which needs to be rebuild every now and then. However, I don't want to slow a user down. What I want is to determine at the end of the script if the cache needs to be rebuild. So I want to close the output stream first, so the user gets it's data, and then I want to rebuild the cache. It isn't