Slack: ファイルアップロード（Bots）

main();
function main() {
  const token = configs.get("Token");
  const channel = configs.get("ChannelName");
  const file = engine.findDataByNumber(configs.get("File"));
//  const comment = configs.get("Comment");
//check whether files exist or not
  if (file == null){
    engine.log ("No File to upload");
    return;
  }
  //check whether number of files is under the limit
  const numOfFiles = file.length;
  if (numOfFiles > httpClient.getRequestingLimit()){
    throw "Number of Files is over the limit.";
  }
  for (let i = 0; i < numOfFiles; i++){
    upload(token,file[i],channel);
  }
}
//Upload and output log process
function upload (token,file,channel){ 
  let response = httpClient.begin()
    .bearer(token)
    .multipart('file',file)
    .multipart('channels',channel)
    .post("https://slack.com/api/files.upload");
    
  const status = response.getStatusCode();
  const responseTxt = response.getResponseAsString();
  const responseJson = JSON.parse(responseTxt);
  if (responseJson.ok == false ) {
    const error = file.getName() + "\nFailed to upload \n" + responseTxt;
    throw error;
  }
  engine.log(file.getName());
  engine.log("status:" + status);
  engine.log(responseTxt);
}