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Cannot add attachment to new RT ticket

I'm currently using RT 4.4.3 in a project and I'm trying to create a new ticket with an attachment, using Java code.
I tried to follow the instructions provided by this BestPractical resource hosted on GitHub and specified in this list of pulls.
The code fragment that tries to perform the operation is the following:
PostMethod mPost = new PostMethod(TicketListConstants.SEGNALAZIONI_RTIR_URI + "/ticket");
mPost.setRequestHeader("Content-type", "application/json");
mPost.setRequestHeader("Authorization", TicketListConstants.SEGNALAZIONI_RTIR_TOKEN);
/*String json = ;
NameValuePair[] data = {
new NameValuePair("content", json)
};*/
UploadPortletRequest uploadRequest = PortalUtil.getUploadPortletRequest(request);
File file = uploadRequest.getFile("fileName");
String filename = uploadRequest.getFileName("fileName");
byte[] filecontent = this.encodeBase64(file);
mPost.setRequestBody("{ \"Queue\": \"Infosharing\", \"Subject\": \""+subject+"\",\"From\":\""+currentUser.getEmailAddress()+"\",\"To\":\"test#liferay.com\",\"Owner\":\""
+currentUser.getEmailAddress()+"\",\"Requestor\":\""+currentUser.getEmailAddress()+"\",\"Content\":\""+description+"\",\"AttachmentsContents\":[{\"FileName\":\""+filename+"\",\"FileType\":\"application/pdf\",\"FileContent\":\""+filecontent+"\"}]}");
HttpClient cl = new HttpClient();
String result = "";
String newId = "";
try {
cl.executeMethod(mPost);
result = mPost.getResponseBodyAsString();
if (result != null) {
JSONObject json = null;
try {
json = JSONFactoryUtil.createJSONObject(result);
} catch (JSONException e) {
_log.error("Error extracting ticket info: "+e.getMessage());
}
newId = json.getString("id");
}
} catch (UnsupportedEncodingException e){
_log.error("Error in searching tickets: "+e.getMessage());
} catch (IOException io) {
_log.error("Error in searching tickets: "+io.getMessage());
}
So the JSON I'm sending to RT is the following:
{ "Queue": "Infosharing", "Subject": "Tutto in uno","From":"test#liferay.com","To":"test#liferay.com","Owner":"test#liferay.com","Requestor":"test#liferay.com","Content":"Aggiungo tutto in un solo passaggio","AttachmentsContents":[{"FileName":"prova.txt","FileType":"plain/text","FileContent":""}]}
The problem is that the ticket is correctly created but no attachment is added.
I also tried to perform the same using SOAPUI but no attachment is added to the ticket even if the response is without any error.
Could somebody help me what I'm doing wrong?
EDIT 2019-06-10: since it seems that, as reported here, at least till the end of December 2018:
CREATING ATTACHMENTS Currently RT does not allow creating attachments
via their API.
See https://rt-wiki.bestpractical.com/wiki/REST#Ticket_Attachment
but it should be possible, as a temporary workaround, to post attachments to ticket's comments, can anybody help finding a solution to this problem?

Since I cannot test your code, I suggest you to use HttpClient 4, I provide below a sample code snippet. Modify the code as per your requirement and try to check.
HttpPost post = new HttpPost("http://rtserver.com");
FileBody fileBody = new FileBody(file, ContentType.DEFAULT_BINARY);
StringBody stringBody1 = new StringBody("Message 1", ContentType.MULTIPART_FORM_DATA);
MultipartEntityBuilder builder = MultipartEntityBuilder.create();
builder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
builder.addPart("upfile", fileBody);
builder.addPart("text1", stringBody1);
HttpEntity entity = builder.build();
post.setEntity(entity);
HttpResponse response = client.execute(post);

uploading files to a dataset in CKAN / datahub.io through a Java client

I am testing the uploading of files to a dataset on CKAN / datahub.io through a Java client of the API.
public String uploadFile()
throws CKANException {
String returned_json = this._connection.MultiPartPost("", "");
System.out.println("r: " + returned_json);
return returned_json;
}
and
protected String MultiPartPost(String path, String data)
throws CKANException {
URL url = null;
try {
url = new URL(this.m_host + ":" + this.m_port + path);
} catch (MalformedURLException mue) {
System.err.println(mue);
return null;
}
String body = "";
HttpClient httpclient = new DefaultHttpClient();
try {
String fileName = "D:\\test.jpg";
FileBody bin = new FileBody(new File(fileName),"image/jpeg");
StringBody comment = new StringBody("Filename: " + fileName);
MultipartEntity reqEntity = new MultipartEntity();
reqEntity.addPart("bin", bin);
reqEntity.addPart("comment", comment);
HttpPost postRequest = new HttpPost("http://datahub.io/api/storage/auth/form/2013-01-24T130158/test.jpg");
postRequest.setEntity(reqEntity);
postRequest.setHeader("X-CKAN-API-Key", this._apikey);
HttpResponse response = httpclient.execute(postRequest);
int statusCode = response.getStatusLine().getStatusCode();
System.out.println("status code: " + statusCode);
BufferedReader br = new BufferedReader(
new InputStreamReader((response.getEntity().getContent())));
String line;
while ((line = br.readLine()) != null) {
body += line;
}
System.out.println("body: " + body);
} catch (IOException ioe) {
System.out.println(ioe);
} finally {
httpclient.getConnectionManager().shutdown();
}
return body;
}
2 responses I get to my POST request:
a 413 error ("request entity too large") when the jpeg I try to upload is 2.83 Mb. This disappears when I shrink the file to a smaller size. Is there a limit to file size uploads?
a 500 error ("internal server error"). This is where I am stuck. It might have to do with the fact that my dataset on datahub.io is not "datastore enabled"? (I see a disabled "Data API" button next to my resource files in the dataset, with a tooltip saying:
"Data API is unavailable for this resource as DataStore is disabled"
=> is it a possible reason for this 500 error? If so, how could I enable it from the client side? (pointers to Python code would be useful!)
Thx!
PS: the dataset I am using for testing purposes: http://datahub.io/dataset/testapi

Only someone with access to the exception log could tell you why the 500 is occurring.
However, I'd check your request is the same as what you'd get from the python client that was written alongside the datastore: https://github.com/okfn/ckanclient/blob/master/ckanclient/init.py#L546
You're sending the "bin" image buffer and "comment" file_key in your multipart request. Note the file_key must be changed for every upload, so add in a timestamp or something. And maybe you need to add in a Content-Type: for the binary.

I have been going through the same kind of troubles as the poster of this question. After quite a bit of trial and error, I came up with a solution to the problem. In my case, I had some control over the CKAN repository that I wanted to upload to. If you don't, your problem might be impossible to solve...
I assume you are using the 1.8 version of CKAN?
First of all, check whether the CKAN repository has been set up to allow file upload and if not, configure it to allow that. This can be done on the server using the steps posted here: http://docs.ckan.org/en/ckan-1.8/filestore.html#local-file-storage
The 413 error that you mentioned should be adressed next. This has to do with the general configuration of the server. In my case, the CKAN was hosted through nginx. I added a "client_max_body_size 100M" line to the nginx.conf file. See this post for instance: http://recursive-design.com/blog/2009/11/18/nginx-error-413-request-entity-too-large/
Then there is only the 500 error left. At the time of this writing, the api documentation of CKAN is still a little immature... It does indeed say that you have to build a request like you have made for file upload. However, this request is just to ask for permission for the file upload. If your credentials check out for file upload (not every user may be allowed to upload files), the response holds an object telling you where to send your file to... Because of the unclear api, you ended up merging these two requests.
The following scenario shows a follow up of two requests to handle the file upload. It might be that some steps in the scenario work out differently in your case, because of a repository that has been set up a little differently. If you get error messages, please be sure to check the response's body for clues!
Here is the authentication request that I used:
String body = "";
String generatedFilename=null;
HttpClient httpclient = new DefaultHttpClient();
try {
// create new identifier for every file, use time
SimpleDateFormat dateFormatGmt = new SimpleDateFormat("yyyyMMMddHHmmss");
dateFormatGmt.setTimeZone(TimeZone.getTimeZone("GMT"));
String date=dateFormatGmt.format(new Date());
generatedFilename=date +"/"+filename;
HttpGet getRequest = new HttpGet(this.CKANrepos+ "/api/storage/auth/form/"+generatedFilename);
getRequest.setHeader(CKANapiHeader, this.CKANapi);
HttpResponse response = httpclient.execute(getRequest);
int statusCode = response.getStatusLine().getStatusCode();
BufferedReader br = new BufferedReader(
new InputStreamReader((response.getEntity().getContent())));
String line;
while ((line = br.readLine()) != null) {
body += line;
}
if(statusCode!=200){
throw new IllegalStateException("File reservation failed, server responded with code: "+statusCode+
"\n\nThe message was: "+body);
}
}finally {
httpclient.getConnectionManager().shutdown();
}
Now, if all goes well, the server responds with a json object holding the parameters to use when doing the actual file upload. In my case, the object looked like:
{file_key:"some-filename-to-use-when-uploading"}
Be sure to check the json object though, as I'm given to understand that there may be custom ckan repositories that require more or different parameters.
These responses can then be used in the actual file upload:
File file = new File("/tmp/file.rdf");
String body = "";
HttpClient httpclient = new DefaultHttpClient();
try {
FileBody bin = new FileBody(file,"application/rdf+xml");
MultipartEntity reqEntity = new MultipartEntity();
reqEntity.addPart("file", bin);
reqEntity.addPart("key", new StringBody(filename));
HttpPost postRequest = new HttpPost(this.CKANrepos+"/storage/upload_handle");
postRequest.setEntity(reqEntity);
postRequest.setHeader(CKANapiHeader, this.CKANapi);
HttpResponse response = httpclient.execute(postRequest);
int statusCode = response.getStatusLine().getStatusCode();
BufferedReader br = new BufferedReader(
new InputStreamReader((response.getEntity().getContent())));
String line;
while ((line = br.readLine()) != null) {
body += line;
}
if(statusCode!=200){
getWindow().showNotification("Upload Statuscode: "+statusCode,
body,
Window.Notification.TYPE_ERROR_MESSAGE);
}
}finally {
httpclient.getConnectionManager().shutdown();
}
as you can see, the file_key property has now been transformed into the simple 'key' property. I don't know why.
This will get your file uploaded. The response to this upload request will hold a json object telling you where the file got uploaded to. edit: actually it seems that my ckan responded with a simple html page to tell me that the file got uploaded... I had to parse the page to confirm that the file was uploaded correctly :(
In my case, the file was at
this.CKANrepos +"/storage/f/"+location
where location is the filename returned in the authentication phase.
In the previous code fragments:
//the location of your ckan repository, including /api and possibly version, e.g.
this.CKANrepos = "http://datahub.io/api/3/";
this.CKANapiHeader="X-CKAN-API-Key";
this.CKANapi = "your ckan api key here";

How to upload data using POST-query?

I have following problem: I'm developing the application which need to authorize on server and upload data from my mobile into it. The server side is ready and works correctly. So, for authorizing I use the following code:
URL url = new URL(VALIDATING_URL);
URLConnection connection=url.openConnection();
connection.setDoOutput(true);
PrintWriter out=new PrintWriter(connection.getOutputStream());
out.print(POST_QUERY_EMAIL+email);
out.print("&");
out.print(POST_QUERY_PASS+password);
out.print("&");
out.print(POST_QUERY_CHANNEL+channel);
out.close();
Scanner in=new Scanner(connection.getInputStream());
StringBuilder result=new StringBuilder();
while (in.hasNextLine()) {
result.append(in.nextLine());
result.append("\n");
}
in.close();
It works correctly, and the application will get needed result if I enter correctly data. So, now I need to upload data into server using POST-query, but I don't know how I can do it. Using HTML forms, video is usually uploaded using 'userfile' variable and will be got from $_FILES array in PHP scipts. How can I upload do it from Java? Can I just print data into PrintStream from InputStream?
Thank you, I hope you can help me

Try this,
public void postData() throws Exception {
HttpClient client = new DefaultHttpClient();
HttpPost httppost = new HttpPost("https://www.xyz.com");
List<NameValuePair> list = new ArrayList<NameValuePair>(1);
list.add(new BasicNameValuePair("name","ABC");
httppost.setEntity(new UrlEncodedFormEntity(list));
HttpResponse r = client.execute(httppost);
}

I would suggest reading this. It shows you how to do a POST with URLConnection and explains what's going on.

PHP json_encode() returns nothing

OK, few days ago I wrote a block of code in Java that sends post requests to a PHP file in order to store some data in a MySQL database and receive back simple json_encode() strings such as "error_101" responses from PHP and it worked just fine. Yesterday I reinstalled my XAMPP because I've had some problems with openssl PHP extention and now none of my json_encode() reponses return a value. I've checked the phpinfo() and it says that json support is enabled. To mention that values sent to PHP from JAVA are JSON objects as well and the json_decode() works just fine!
Here's my code to send responses from PHP to JAVA:
<?php
header('Content-type: application/json');
echo json_encode("error_101");
?>
Here's the code to get the response in JAVA
HttpParams httpParams = new BasicHttpParams();
HttpConnectionParams.setConnectionTimeout(httpParams, 10000);
HttpConnectionParams.setSoTimeout(httpParams, 10000);
HttpClient client = new DefaultHttpClient(httpParams);
String url = "http://192.168.254.19/android/register.php";
HttpPost request = new HttpPost(url);
request.setEntity(new ByteArrayEntity(json.toString().getBytes("UTF8")));
request.setHeader("json", json.toString());
HttpResponse response = client.execute(request);
HttpEntity entity = response.getEntity();
String result = null;
if (entity != null) {
InputStream instream = entity.getContent();
InputStreamReader is_reader = new InputStreamReader(instream);
BufferedReader br = new BufferedReader(is_reader);
result = br.readLine();
Log.i("Read from server", result);
Toast.makeText(this, result, Toast.LENGTH_LONG).show();
}
The response I'm getting is "<br />"

You sure you don't have some debug code somewhere up the chain that reads
echo $TesttVar1 . '<br />';
That would also stop the "header()" from working. Turn on ALL errors (error_reporting(E_ALL); ini_set('display_errors', 'on'); ) and that will show you the line the is output, if that's the case.
But to help weed it out if it is json_encode, just return "Error_101" without the function to test. But I don't think you're getting that far down the program.

json_encode needs an array. like
json_encode(array('status'=>'error_101'));

in this case:
header("Content-type: text/html");
echo json_encode("error_101");
it works.
in this other case:
header("Content-type: application/json");
echo json_encode("error_101");
it doesn't work.
It seems a bug!

Reading JSON data from the net (Twitter)

I found this great tutorial on how to use JSON to retrieve Twitter updates, and post it in a TextView:
http://www.ibm.com/developerworks/xml/library/x-andbene1/
I've followed this tutorial step by step, so my code is the same.
In the method examineJSONFile(), we have this line:
InputStream is = this.getResources().openRawResource(R.raw.jsontwitter);
This file is downloaded directly from the Twitter website, as mentioned in the second paragraph of http://www.ibm.com/developerworks/xml/library/x-andbene1/#aotf.
All this is great, except for one thing: it's absolutely no use that one has to download the Twitter updates (tweets) and then build the app using this as a raw file. It should be possible to download this JSON file at runtime, and then show the tweets in the TextView afterwards.
I have tried to create the InputStream in another way, like this:
String url = "http://twitter.com/statuses/user_timeline/bbcnews.json";
HttpClient httpclient = new DefaultHttpClient();
HttpResponse response = httpclient.execute(new HttpGet(url));
InputStream is = response.getEntity().getContent();
BufferedReader br = new BufferedReader(new InputStreamReader(is,"UTF-8"));
StringBuffer sb = new StringBuffer();
try
{
String line = null;
while ((line = br.readLine())!=null)
{
sb.append(line);
sb.append('\n');
}
}
catch (IOException e)
{
e.printStackTrace();
}
String jsontext = new String(sb.toString());
But it seems this line: HttpResponse response = httpclient.execute(new HttpGet(url)); throws an exception.
Any help please?

You seem to be missing the INTERNET permission. Look at the logs and it would be clear what exactly is the problem.