Java and HttpURLConnection not sending data

Question

I'm trying to get HttpURLConnection to post a JSON string to a PHP file remotely. It's not working no matter what I do. This is my current code:

HttpURLConnection httpcon = (HttpURLConnection) ((new URL('http://domain.com/me.php').openConnection()));
                            httpcon.setDoOutput(true);
                            httpcon.setRequestProperty("Content-Type", "application/json");
                            httpcon.setRequestProperty("Accept", "application/json");
                            httpcon.setRequestMethod("POST");
                            httpcon.connect();

                            String initial = "{'out': '" + idir + prod + ".jpg', 'in': '" + item[3] + "'}";
                            byte[] outputBytes = initial.getBytes("UTF-8");

                            OutputStream os = httpcon.getOutputStream();
                            os.write(outputBytes);

                            os.close();

I know that the initial string contains data, I have run a System.out.println on it and the outputBytes variables and both have contents.

I know it's not posting because I have the PHP file set to save posted contents to a file locally. No file is ever created when running it.

I know the PHP side of things work and the server accepts posts as I can run this just fine:

$ curl -H "Accept: application/json" -H "Content-Type: application/json" -d "{'value': 7.5}" "http://domain.com/me.php"

And it works fine creating the file and writing post content to output file.

EDIT

Ok, after printing the responses I'm now getting a 401 code, unauthorized. I'm using Apache HTPASSWD authentication, but I was passing the user and pass in the URL as http://user:[email protected]/me.php. This worked from curl from the CLI, so I thought it would work here also, evidently it does not.

So how do I authenticate using HttpURLConnection?

I forgot to mention, it is within a try and catch but no exceptions come up. — jfreak53
– jfreak53, Commented Aug 20, 2014 at 19:50
There's a getResponseCode method. You can also getInputStream or getErrorStream to see if there was a response body. — Sotirios Delimanolis
– Sotirios Delimanolis, Commented Aug 20, 2014 at 19:55
@luanjot At this point it doesn't matter wether PHP parses correctly or not. The fact of the matter is PHP isn't even creating the file on calling it from a url. The file write method of PHP is called at the very top before anything, heck I can call the PHP file from a URL bar in a browser and get an empty file created. So the fact is that no matter what PHP is doing Java is never making a connection to the file, hence where the problem lies. — jfreak53
– jfreak53, Commented Aug 20, 2014 at 19:58
You should update your question with those details. I don't know how but I'm sure there are some related questions/answers around here. — Sotirios Delimanolis
– Sotirios Delimanolis, Commented Aug 20, 2014 at 20:04

Community · Accepted Answer · 2017-05-23 11:57:42Z

1

You need to set up basic authentication. You can do it through plain Java or using Apache HttpClient.

How to handle HTTP authentication using HttpURLConnection?

http://www.baeldung.com/httpclient-4-basic-authentication

edited May 23, 2017 at 11:57

CommunityBot

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answered Aug 20, 2014 at 21:06

markbernard

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