Why files are sand and saved in format .bin ?

Good day! Rewrote the script from Python to Groovy, send reports to the server, but attachments do not appear, if you upload them they are in .bin format. Tell me the pictures do not need to be encrypted when sending?

task sendReports {
    group "Work Allure Server api"
    description "send results test in remote server"
    doLast {
        File f = new File("${project.buildDir}/allure-results");
        if (f.exists() && f.isDirectory()) {
            def request = new Request()
            f.eachFile {
                Reports files = new Reports(
                        file_name: it.name,
                        content_base64: it.text.bytes.encodeBase64()
                )
                request.results.add(files)
            }
            def req = new URL(gradle.allureServer+"/send-results").openConnection()
            req.setRequestMethod("POST")
            req.setRequestProperty("Content-Type", "application/json; charset=UTF-8")
            req.setDoOutput(true)
            req.getOutputStream().write(JsonOutput.toJson(request).getBytes("UTF-8"))
            logger.quiet "Status code: ${req.getResponseCode()}"
            def resp = new JsonSlurper().parseText(req.getInputStream().getText())
            logger.quiet "Response: ${resp}"
        } else {
            logger.quiet "Not folder: ${project.buildDir}/allure-results"
        }
    }
}

class Request {
    List<Reports> results = new LinkedList<>()
}
class Reports {
    String file_name
    String content_base64
}

[fescobar]

@FullZero5 I’ve added it a new example in case you use pipelines in Jenkins https://github.com/fescobar/allure-docker-service/blob/master/allure-docker-api-usage/send_results_jenkins_pipeline.groovy

[FullZero5]

I’ll add the code, it might come in handy for someone (it works somehow)

task sendReports {
    group "Work Allure Server api"
    description "send results test in remote server"
    doLast {
        File f = new File("${project.buildDir}/allure-results")
        if (f.exists() && f.isDirectory()) {
            def request = new Request()
            f.eachFile {
                Reports files = new Reports(
                        file_name: it.name,
                        content_base64: it.bytes.encodeBase64()
                )
                request.results.add(files)
            }
            def req = new URL(gradle.allureServer+"/send-results").openConnection()
            req.setRequestMethod("POST")
            req.setRequestProperty("Content-Type", "application/json; charset=UTF-8")
            req.setDoOutput(true)
            req.getOutputStream().write(JsonOutput.toJson(request).getBytes("UTF-8"))
            logger.quiet "Status code: ${req.getResponseCode()}"
            def resp = new JsonSlurper().parseText(req.getInputStream().getText())
            logger.quiet "Response: ${resp}"
        } else {
            logger.quiet "Not folder: ${project.buildDir}/allure-results"
        }
    }
}

class Request {
    List<Reports> results = new LinkedList<>()
}
class Reports {
    String file_name
    String content_base64
}