We can not find rest API for attachment.

Check out Lithium's REST documentation for attachments. I haven't used them before via REST but hope this helps. http://lithosphere.lithium.com/t5/rest-api/bd-p/developers-rest-api?branch=Attachment 

We are unable to find any solution in the above link

There is a bug in the docs -- you can't have a space at the end of the URL -- try this instead:

http://lithosphere.lithium.com/t5/rest-api/bd-p/developers-rest-api?branch=Attachment

Thanks,

-Doug

Hi Harshal,

You can add 1 or more attachments to any normal REST API post/edit/reply call by making the request using "multipart/form-data" for the content type and including 1 or more files as POST parameters.  Here are links to the standard post, reply, and edit calls for a board:

http://lithosphere.lithium.com/t5/rest-api/bd-p/developers-rest-api?leaf-id=Board.messages.post#Board.messages.post

http://lithosphere.lithium.com/t5/rest-api/bd-p/developers-rest-api?leaf-id=Message.reply#Message.reply

http://lithosphere.lithium.com/t5/rest-api/bd-p/developers-rest-api?leaf-id=Message.edit#Message.edit

What is the attachement parameter to be used for upload the files?

Hi pratikgadekar,

the field parameter name to post a message with restapi is "message.upload".

here is my Java sample code to post a message with an an attachment via REST API. (you may need to import the latest apache http jar files)

    public static void main(String[] args) throws Exception {

        // Setup
        String communityUrl = "http://mycommunityid.stage.lithium.com";
        String restUser = "HaidongG";
        String restPassword = "my_secret_password";

        String communityRestUrl = communityUrl + "/restapi/vc";

        debug("Authentication ...");
        String loginUrl = communityRestUrl + "/authentication/sessions/login?user.login=" + restUser + "&user.password=" + restPassword;
        String authenResult = httpGet(loginUrl, null);
        String restSessionKey = extractSessionKeyFromXML(authenResult);

        String board = "this_is_my_board_id";
        String subject = encode("Subject 9th April");
        String body = encode("Body 9th April");

        debug("creating Message with attachment");
        String postUrl = communityRestUrl + "/boards/id/" + board + "/messages/post";
        String createResult = httpPostMessage(postUrl, restSessionKey, subject, body, new File("c:/tmp/test.jpg"));
        String messageId = extractMessageIdFromXML(createResult);
        debug("\n\n messageId=" + messageId + "\n\n");
    }
    
    private static String httpPostMessage(String urlStr, String restSessionKey, String subject, String body, File file) throws Exception {

        urlStr = addSessionKeyToURL(urlStr, restSessionKey);
        debug("Posting to " + urlStr + ", Attachment is " + file.getAbsolutePath());

        HttpPost post = new HttpPost(urlStr);
        MultipartEntityBuilder builder = MultipartEntityBuilder.create();

        builder.addTextBody("message.subject", subject);
        builder.addTextBody("message.body", body);        
        builder.addPart("message.upload", new FileBody(file));

        HttpEntity entity = builder.build();
        post.setEntity(entity);
        HttpClient client = HttpClientBuilder.create().build();
        HttpResponse response = null;
        try {
            response = client.execute(post);
        } catch (ClientProtocolException e) {
            debug(e);
        } catch (IOException e) {
            debug(e);
        }

        return getResponseString(response);
    }

 I hope that my code helps to explain better.

Best Regards

Haidong

I believe the logic allows any parameter name for files.  As long as the API request to post a message is a multipart/form-data request, it will take whatever files are included and add them as attachments.

-Doug

yes, Doug is right. any file name will do.

I have just tested with 

builder.addPart("message.uploadxxxxxxxxx", new FileBody(file));

 and my file got uploaded via REST too.

Any clue how this would be done in .NET?