remote SMTP from docker compose

SymphonyManager/src/main/java/io/github/lumijiez/ftp/FTPFetcher.java

@@ -1,13 +1,17 @@
 package io.github.lumijiez.ftp;
 
 import io.github.lumijiez.Main;
+import io.github.lumijiez.http.AddressHolder;
 import org.apache.commons.net.ftp.FTPClient;
 
-import java.io.File;
-import java.io.FileOutputStream;
-import java.io.IOException;
+import java.io.*;
+import java.net.HttpURLConnection;
+import java.net.URL;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
 import java.util.Timer;
 import java.util.TimerTask;
+import java.util.UUID;
 
 public class FTPFetcher {
     String ftpServer = "ftp_server";
@@ -53,6 +57,12 @@ public class FTPFetcher {
                     boolean success = ftpClient.retrieveFile(fileName, fos);
                     if (success) {
                         Main.logger.info("File downloaded: {}", localFile.getName());
+
+                        sendFileToMultipartEndpoint(localFile,
+                                "http://"
+                                        + AddressHolder.getInstance().getHost()
+                                        + ":" + AddressHolder.getInstance().getPort()
+                                        + "/upload", "Description of " + fileName);
                     } else {
                         Main.logger.error("Failed to download the file: {}", fileName);
                     }
@@ -78,4 +88,68 @@ public class FTPFetcher {
             }
         }
     }
+
+    private static void sendFileToMultipartEndpoint(File file, String endpointUrl, String description) {
+        try {
+            String boundary = UUID.randomUUID().toString();
+
+            HttpURLConnection connection = (HttpURLConnection) new URL(endpointUrl).openConnection();
+            connection.setDoOutput(true);
+            connection.setRequestMethod("POST");
+            connection.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + boundary);
+
+            try (OutputStream outputStream = connection.getOutputStream();
+                 PrintWriter writer = new PrintWriter(new OutputStreamWriter(outputStream, StandardCharsets.UTF_8), true)) {
+
+                writer.append("--").append(boundary).append("\r\n");
+                writer.append("Content-Disposition: form-data; name=\"description\"\r\n");
+                writer.append("Content-Type: text/plain; charset=UTF-8\r\n\r\n");
+                writer.append(description).append("\r\n");
+
+                writer.append("--").append(boundary).append("\r\n");
+                writer.append("Content-Disposition: form-data; name=\"file\"; filename=\"")
+                        .append(file.getName()).append("\"\r\n");
+                writer.append("Content-Type: application/octet-stream\r\n\r\n");
+                writer.flush();
+
+                try (FileInputStream fileInputStream = new FileInputStream(file)) {
+                    byte[] buffer = new byte[4096];
+                    int bytesRead;
+                    while ((bytesRead = fileInputStream.read(buffer)) != -1) {
+                        outputStream.write(buffer, 0, bytesRead);
+                    }
+                }
+
+                writer.append("\r\n--").append(boundary).append("--\r\n");
+                writer.flush();
+            }
+
+            int responseCode = connection.getResponseCode();
+            if (responseCode == 200) {
+                System.out.println("File successfully uploaded to the endpoint " + AddressHolder.getInstance().getHost() + ":" + AddressHolder.getInstance().getPort() + ": " + file.getName());
+                try (BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()))) {
+                    String line;
+                    StringBuilder response = new StringBuilder();
+                    while ((line = reader.readLine()) != null) {
+                        response.append(line);
+                    }
+                    System.out.println("Server response: " + response);
+                }
+            } else {
+                try (BufferedReader errorReader = new BufferedReader(new InputStreamReader(connection.getErrorStream()))) {
+                    String line;
+                    StringBuilder errorResponse = new StringBuilder();
+                    while ((line = errorReader.readLine()) != null) {
+                        errorResponse.append(line);
+                    }
+                    System.err.println("Failed to upload file. Response code: " + responseCode);
+                    System.err.println("Error details: " + errorResponse);
+                }
+            }
+
+        } catch (IOException e) {
+            e.printStackTrace();
+            System.err.println("Error sending file to endpoint: " + e.getMessage());
+        }
+    }
 }