Uploading file using Java gives 200 response, but no file was uploaded

[Illés Ákos]

Hi all!

I'm trying to upload a pdf file to one of my Jira issues using Java. I tried older solutions posted on this forum, but they doesn't seem to work. Here is what I have now:

public CloseableHttpResponse addAttachment(String baseUrl, String issueKey, String filePath) throws IOException{
    try (CloseableHttpClient client = HttpClientBuilder.create().build();) {
        HttpPost httpPost = new HttpPost(baseUrl+"/"+issueKey+"/attachments");
        httpPost.setHeader(new BasicHeader("Authorization", "Bearer " + apiKey));
        httpPost.setHeader("X-Atlassian-Token", "no-check");
        httpPost.setHeader("Content-Type", "multipart/form-data;boundary=gc0p4Jq0M2Yt08jU534c0p");

        File file = new File(filePath);
        MultipartEntityBuilder builder = MultipartEntityBuilder.create();
        builder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
        builder.addBinaryBody("file", file, ContentType.APPLICATION_OCTET_STREAM, file.getName());

        HttpEntity entity = builder.build();

        httpPost.setEntity(entity);

        CloseableHttpResponse response = client.execute(httpPost);
        
        return response;
    }
}

My problem is that it sends the request and responds with 200, but with a body of: [], and nothing is uploaded. Everything works fine with Postman, so it must be something with my code.

Someone please help me fix it.

Thanks,
Ákos

[Illés Ákos · Accepted solution]

I couldn't solve the problem, but found a workaround. If I use a curl command from the code then it works. 
For anyone, who has the same problem here is my code:

public String addAttachment(String issueKey, String filePath) throws IOException {
    //Command to execute
    String[] command = {
            "curl",
            "-X", "POST",
            "-H", "Authorization: Bearer " + apiKey,
            "-H", "X-Atlassian-Token: no-check",
            "-F", "file=@"+filePath,
            baseUrl + "/issue/" + issueKey + "/attachments"
    };

    // Create ProcessBuilder
    ProcessBuilder processBuilder = new ProcessBuilder(command);

    // Start the process
    Process process = processBuilder.start();

    // Read the output
    BufferedReader reader =
            new BufferedReader(new InputStreamReader(process.getInputStream()));
    String respond = "";
    String line;
    while ((line = reader.readLine()) != null) {
        respond = respond.concat(line);
    }
    return respond;
}