scheduled cleanup

.gitea/workflows/demo.yaml

@@ -1,37 +0,0 @@
-name: Gitea Actions Demo
-run-name: ${{ gitea.actor }} is testing out Gitea Actions 🚀
-on: [push]
-
-jobs:
-  Explore-Gitea-Actions:
-    runs-on: x86
-    container:
-      image: gitea.gregorlohaus.com/gregor/graal:latest
-      credentials:
-        username: lohausgregor@gmail.com
-        password: ${{ secrets.REGPASS }}
-    steps:
-      - name: Check out repository code
-        uses: actions/checkout@v4
-      - run: /usr/local/bin/docker-entrypoint.sh postgres &
-      - name: build
-        working-directory: ${{ gitea.workspace }}/Backend
-        env:
-          JAVA_HOME: /root/.sdkman/candidates/java/current 
-        run: /root/.sdkman/candidates/gradle/9.4.0/bin/gradle build
-      - name: deploy
-        shell: bash
-        run: |
-          eval "$(ssh-agent -s)"
-          ssh-add <(echo "${{ secrets.DEPLOYSSHKEY }}")
-          mkdir -p ~/.ssh
-          ssh-keyscan 162.55.217.172 >> ~/.ssh/known_hosts
-          scp ${{ gitea.workspace }}/Backend/build/native/nativeCompile/gtransfer anon@162.55.217.172:/home/anon/.local/bin/gtransfernew
-          ssh anon@162.55.217.172 "chmod +x /home/anon/.local/bin/gtransfernew"
-          ssh anon@162.55.217.172 "mv /home/anon/.local/bin/gtransfernew /home/anon/.local/bin/gtransfer"
-          ssh anon@162.55.217.172 "sudo systemctl restart gtransfer"
-      - name: upload binary
-        uses: https://gitea.com/actions/gitea-upload-artifact@v4
-        with:
-          name: gtransfer
-          path: ${{ gitea.workspace }}/Backend/build/native/nativeCompile/gtransfer

.gitignore

@@ -8,4 +8,3 @@ devenv.local.nix
 # pre-commit
 .pre-commit-config.yaml
 .gradle
-layout.kdl

Backend/build.gradle

@@ -20,7 +20,6 @@ repositories {
 }
 
 dependencies {
-	implementation 'com.google.code.gson:gson:2.10.1'
 	implementation 'org.springframework.boot:spring-boot-starter-web'
 	implementation 'org.springframework.boot:spring-boot-starter-thymeleaf'
 	implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
@@ -34,16 +33,6 @@ dependencies {
 	implementation 'io.github.wasabithumb:jtoml-serializer-reflect:1.4.2'
 }
 
-graalvmNative {
-	binaries {
-		main {
-			buildArgs.add("--static-nolibc")
-			buildArgs.add("--libc=glibc")
-			buildArgs.add("--verbose")
-		}
-	}
-}
-
 tasks.named('test') {
 	useJUnitPlatform()
 }

Backend/src/main/java/com/gregor_lohaus/gtransfer/GtransferApplication.java

@@ -1,6 +1,5 @@
 package com.gregor_lohaus.gtransfer;
 
-import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.context.annotation.ImportRuntimeHints;
@@ -10,17 +9,11 @@ import com.gregor_lohaus.gtransfer.config.ConfigRuntimeHints;
 import com.gregor_lohaus.gtransfer.model.ModelRuntimeHints;
 import com.gregor_lohaus.gtransfer.native_image.HibernateRuntimeHints;
 import com.gregor_lohaus.gtransfer.native_image.WebRuntimeHints;
-import com.gregor_lohaus.gtransfer.services.filecleanup.FileCleanupService;
-
-import org.springframework.scheduling.annotation.EnableScheduling;
 
 @SpringBootApplication
 @RestController
-@EnableScheduling
 @ImportRuntimeHints({ConfigRuntimeHints.class, HibernateRuntimeHints.class, ModelRuntimeHints.class, WebRuntimeHints.class})
 public class GtransferApplication {
-	@Autowired
-	private FileCleanupService cleanupService;
 	public static void main(String[] args) {
 		SpringApplication.run(GtransferApplication.class, args);
 	}

Backend/src/main/java/com/gregor_lohaus/gtransfer/config/ConfigEnvironmentPostProcessor.java

@@ -5,9 +5,9 @@ import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import com.gregor_lohaus.gtransfer.config.types.Config;
-// import com.google.gson.Gson;
+
-// import com.google.gson.GsonBuilder;
 import org.springframework.boot.EnvironmentPostProcessor;
+// import org.springframework.boot.env.EnvironmentPostProcessor;
 import org.springframework.boot.SpringApplication;
 import org.springframework.core.env.ConfigurableEnvironment;
 
@@ -41,10 +41,6 @@ public class ConfigEnvironmentPostProcessor implements EnvironmentPostProcessor
 				System.exit(1);
 			}
 			Config defaultConfig = DefaultConfig.config;
-			// Gson gson = new GsonBuilder().setPrettyPrinting().serializeNulls().create();
-			// String json = gson.toJson(defaultConfig);
-			// System.out.println(json);
-			
 			table = ConfigSerializer.toToml(defaultConfig);
 			toml.write(CONFIG_FILE_PATH, table);
 		}

Backend/src/main/java/com/gregor_lohaus/gtransfer/config/ConfigRuntimeHints.java

@@ -55,16 +55,6 @@ public class ConfigRuntimeHints implements RuntimeHintsRegistrar {
         MemberCategory.INVOKE_PUBLIC_CONSTRUCTORS,
         MemberCategory.ACCESS_DECLARED_FIELDS,
         MemberCategory.ACCESS_PUBLIC_FIELDS);
-    hints.reflection().registerType(ServerConfig.class,
-        MemberCategory.INVOKE_DECLARED_CONSTRUCTORS,
-        MemberCategory.INVOKE_PUBLIC_CONSTRUCTORS,
-        MemberCategory.ACCESS_DECLARED_FIELDS,
-        MemberCategory.ACCESS_PUBLIC_FIELDS);
-    hints.reflection().registerType(SslConfig.class,
-        MemberCategory.INVOKE_DECLARED_CONSTRUCTORS,
-        MemberCategory.INVOKE_PUBLIC_CONSTRUCTORS,
-        MemberCategory.ACCESS_DECLARED_FIELDS,
-        MemberCategory.ACCESS_PUBLIC_FIELDS);
     hints.reflection().registerType(TypeAdapter.class,
         MemberCategory.ACCESS_DECLARED_FIELDS,
         MemberCategory.ACCESS_PUBLIC_FIELDS);

Backend/src/main/java/com/gregor_lohaus/gtransfer/config/DefaultConfig.java

@@ -6,10 +6,8 @@ import com.gregor_lohaus.gtransfer.config.types.Config;
 import com.gregor_lohaus.gtransfer.config.types.DataSourceConfig;
 import com.gregor_lohaus.gtransfer.config.types.JpaConfig;
 import com.gregor_lohaus.gtransfer.config.types.MultipartConfig;
-import com.gregor_lohaus.gtransfer.config.types.ServerConfig;
 import com.gregor_lohaus.gtransfer.config.types.ServletConfig;
 import com.gregor_lohaus.gtransfer.config.types.SpringConfig;
-import com.gregor_lohaus.gtransfer.config.types.SslConfig;
 import com.gregor_lohaus.gtransfer.config.types.StorageService;
 import com.gregor_lohaus.gtransfer.config.types.StorageServiceType;
 import com.gregor_lohaus.gtransfer.config.types.UploadConfig;
@@ -46,19 +44,11 @@ public class DefaultConfig {
 
     c.springConfig = sc;
 
-    ServerConfig svc2 = new ServerConfig();
-    svc2.port = 8080;
-    SslConfig ssl = new SslConfig();
-    ssl.enabled = false;
-    ssl.certificatePrivateKey = "";
-    ssl.certificate = "";
-    svc2.sslConfig = ssl;
-    c.serverConfig = svc2;
-
     UploadConfig uc = new UploadConfig();
     uc.maxDownloadLimit = 100;
     uc.maxExpiryDays = 30;
     uc.cleanupEnabled = true;
+    uc.cleanupIntervalMs = 3600000L;
     c.uploadConfig = uc;
 
     config = c;

Backend/src/main/java/com/gregor_lohaus/gtransfer/config/types/Config.java

@@ -9,9 +9,6 @@ public class Config implements TomlSerializable {
   @Nested(name = "spring")
   @NoPrefix
   public SpringConfig springConfig;
-  @Nested(name = "server")
-  @NoPrefix
-  public ServerConfig serverConfig;
   @Nested(name = "storageService")
   public StorageService storageService;
   @Nested(name = "upload")

Backend/src/main/java/com/gregor_lohaus/gtransfer/config/types/ServerConfig.java

@@ -1,13 +0,0 @@
-package com.gregor_lohaus.gtransfer.config.types;
-
-import com.gregor_lohaus.gtransfer.config.annotations.Nested;
-import com.gregor_lohaus.gtransfer.config.annotations.Property;
-
-import io.github.wasabithumb.jtoml.serial.TomlSerializable;
-
-public class ServerConfig implements TomlSerializable {
-  @Property(name = "port")
-  public Integer port;
-  @Nested(name = "ssl")
-  public SslConfig sslConfig;
-}

Backend/src/main/java/com/gregor_lohaus/gtransfer/config/types/SslConfig.java

@@ -1,14 +0,0 @@
-package com.gregor_lohaus.gtransfer.config.types;
-
-import com.gregor_lohaus.gtransfer.config.annotations.Property;
-
-import io.github.wasabithumb.jtoml.serial.TomlSerializable;
-
-public class SslConfig implements TomlSerializable {
-  @Property(name = "enabled")
-  public Boolean enabled;
-  @Property(name = "certificate")
-  public String certificate;
-  @Property(name = "certificate-private-key")
-  public String certificatePrivateKey;
-}

Backend/src/main/java/com/gregor_lohaus/gtransfer/config/types/UploadConfig.java

@@ -11,4 +11,6 @@ public class UploadConfig implements TomlSerializable {
   public Integer maxExpiryDays;
   @Property(name = "cleanupEnabled")
   public Boolean cleanupEnabled;
+  @Property(name = "cleanupIntervalMs")
+  public Long cleanupIntervalMs;
 }

Backend/src/main/java/com/gregor_lohaus/gtransfer/controller/DownloadController.java

@@ -10,6 +10,7 @@ import org.springframework.http.MediaType;
 import org.springframework.http.ResponseEntity;
 import org.springframework.stereotype.Controller;
 import org.springframework.transaction.annotation.Transactional;
+import org.springframework.ui.Model;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.ResponseBody;
@@ -27,8 +28,10 @@ public class DownloadController {
     @Autowired
     private AbstractStorageService storageService;
 
-    @GetMapping("/download")
+    @GetMapping("/download/{id}")
-    public String page() {
+    public String page(@PathVariable String id, Model model) {
+        fileRepository.findById(id)
+                .ifPresent(f -> model.addAttribute("filename", f.getName()));
         return "download/page";
     }
 

Backend/src/main/java/com/gregor_lohaus/gtransfer/controller/Env.java

@@ -0,0 +1,28 @@
+package com.gregor_lohaus.gtransfer.controller;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.core.env.ConfigurableEnvironment;
+import org.springframework.core.env.MutablePropertySources;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import com.gregor_lohaus.gtransfer.services.filewriter.AbstractStorageService;
+
+@RestController
+public class Env {
+	@Autowired
+	private ConfigurableEnvironment env;
+	@Autowired
+	private AbstractStorageService storageService;
+  @GetMapping("/env")
+  public String env() {
+		StringBuilder b = new StringBuilder();
+		MutablePropertySources sources = this.env.getPropertySources();
+		sources.forEach((var m) -> {
+			b.append(m.toString());
+			b.append("\n");
+		});
+		b.append(storageService.getClass().toString());
+		return b.toString();
+  }
+}

Backend/src/main/java/com/gregor_lohaus/gtransfer/controller/UploadController.java

@@ -45,7 +45,8 @@ public class UploadController {
             @RequestParam("hash") String hash,
             @RequestParam("name") String name,
             @RequestParam(required = false) Integer expiryDays,
-            @RequestParam(required = false) Integer downloadLimit) throws IOException {
+            @RequestParam(required = false) Integer downloadLimit,
+            Model model) throws IOException {
 
         storageService.put(hash, file.getBytes());
 
@@ -56,6 +57,7 @@ public class UploadController {
         f.setDownloadLimit(limit);
         fileRepository.save(f);
 
+        model.addAttribute("id", hash);
         return "upload/result :: view";
     }
 }

Backend/src/main/java/com/gregor_lohaus/gtransfer/services/FileCleanupService.java

@@ -1,4 +1,4 @@
-package com.gregor_lohaus.gtransfer.services.filecleanup;
+package com.gregor_lohaus.gtransfer.services;
 
 import java.time.LocalDateTime;
 import java.util.List;
@@ -15,11 +15,10 @@ import com.gregor_lohaus.gtransfer.model.File;
 import com.gregor_lohaus.gtransfer.model.FileRepository;
 import com.gregor_lohaus.gtransfer.services.filewriter.AbstractStorageService;
 
+@Component
+@ConditionalOnProperty(name = "gtransfer-config.upload.cleanupEnabled", havingValue = "true", matchIfMissing = true)
 public class FileCleanupService {
-    private Boolean enabled;
+
-    public FileCleanupService(Boolean enabled) {
-        this.enabled = enabled;
-    }
     private static final Logger log = LoggerFactory.getLogger(FileCleanupService.class);
 
     @Autowired
@@ -28,24 +27,17 @@ public class FileCleanupService {
     @Autowired
     private AbstractStorageService storageService;
 
-    @Scheduled(fixedDelay = 30000)
+    @Scheduled(fixedDelayString = "${gtransfer-config.upload.cleanupIntervalMs:3600000}")
     @Transactional
     public void cleanupExpiredFiles() {
-        log.info("Cleaneup started");
-        if (!enabled) {
-            log.info("Cleaneup skipped");
-            return;            
-        }
         List<File> expired = fileRepository.findExpired(LocalDateTime.now());
-        if (expired.isEmpty()) {
+        if (expired.isEmpty()) return;
-            log.info("Nothing to clean up");
-            return;
-        };
 
         for (File file : expired) {
             storageService.delete(file.getId());
             fileRepository.delete(file);
         }
+
         log.info("Cleaned up {} expired file(s)", expired.size());
     }
 }

Backend/src/main/java/com/gregor_lohaus/gtransfer/services/filecleanup/FileCleanupServiceConfiguration.java

@@ -1,19 +0,0 @@
-
-package com.gregor_lohaus.gtransfer.services.filecleanup;
-
-import org.springframework.beans.factory.annotation.Value;
-import org.springframework.context.annotation.Bean;
-import org.springframework.context.annotation.Configuration;
-
-import com.gregor_lohaus.gtransfer.config.types.StorageServiceType;
-
-@Configuration
-public class FileCleanupServiceConfiguration {
-  @Bean
-  public FileCleanupService fileCleanupService(
-    @Value("${gtransfer-config.upload.cleanupEnabled}")
-    Boolean enabled
-  ) {
-    return new FileCleanupService(enabled);
-  }
-}

Backend/src/main/java/com/gregor_lohaus/gtransfer/services/filewriter/StorageServiceConfiguration.java

@@ -5,10 +5,12 @@ import java.nio.file.Path;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.scheduling.annotation.EnableScheduling;
 
 import com.gregor_lohaus.gtransfer.config.types.StorageServiceType;
 
 @Configuration
+@EnableScheduling
 public class StorageServiceConfiguration {
 
     //TODO S3 implementation

Backend/src/main/resources/static/crypto.js

@@ -16,32 +16,13 @@ async function encryptFile(arrayBuffer) {
 
     // SHA-256(rawKey) → file identifier sent to server; server never sees the key itself
     const rawKey = await crypto.subtle.exportKey('raw', key);
-    const hash = await hashKey(rawKey);
+    const hash = Array.from(new Uint8Array(await crypto.subtle.digest('SHA-256', rawKey)))
+        .map(b => b.toString(16).padStart(2, '0'))
+        .join('');
 
-    const base64urlKey = encodeKey(rawKey);
+    // Base64url-encode key for URL fragment
+    const base64urlKey = btoa(String.fromCharCode(...new Uint8Array(rawKey)))
+        .replace(/\+/g, '-').replace(/\//g, '_').replace(/=/g, '');
 
     return { payload, hash, base64urlKey };
 }
-
-async function hashKey(rawKey) {
-    return Array.from(new Uint8Array(await crypto.subtle.digest('SHA-256', rawKey)))
-        .map(b => b.toString(16).padStart(2, '0'))
-        .join('');
-}
-
-async function decryptFile(payload, key) {
-    const bytes = new Uint8Array(payload);
-    const iv = bytes.slice(0, 12);
-    const ciphertext = bytes.slice(12);
-    return crypto.subtle.decrypt({ name: 'AES-GCM', iv }, key, ciphertext);
-}
-
-function encodeKey(rawKey) {
-    return btoa(String.fromCharCode(...new Uint8Array(rawKey)))
-        .replace(/\+/g, '-').replace(/\//g, '_').replace(/=/g, '');
-}
-
-function decodeKey(base64url) {
-    const base64 = base64url.replace(/-/g, '+').replace(/_/g, '/');
-    return Uint8Array.from(atob(base64), c => c.charCodeAt(0));
-}

Backend/src/main/resources/static/download.js

@@ -1,133 +1,87 @@
+(async function () {
     const fragment = location.hash.slice(1);
     if (!fragment) {
         showError('No decryption key found in URL.');
-} else try {
+        return;
+    }
+
+    try {
         setStatus('Deriving key\u2026');
 
-    const rawKeyBytes = decodeKey(fragment);
+        // Decode base64url → raw key bytes
-    const id = await hashKey(rawKeyBytes);
+        const base64 = fragment.replace(/-/g, '+').replace(/_/g, '/');
+        const rawKeyBytes = Uint8Array.from(atob(base64), c => c.charCodeAt(0));
 
+        // Import key
         const key = await crypto.subtle.importKey(
             'raw', rawKeyBytes, { name: 'AES-GCM' }, false, ['decrypt']
         );
 
+        // Derive hash → verify it matches the file ID in the URL
+        const hash = Array.from(new Uint8Array(await crypto.subtle.digest('SHA-256', rawKeyBytes)))
+            .map(b => b.toString(16).padStart(2, '0'))
+            .join('');
+
+        const pathId = location.pathname.split('/').pop();
+        if (hash !== pathId) {
+            showError('Invalid link — key does not match file.');
+            return;
+        }
+
         setStatus('Downloading\u2026');
-    const response = await fetch('/download/' + id + '/data');
+        const response = await fetch(location.pathname + '/data');
 
         if (response.status === 410) {
             showError('This file has expired or reached its download limit.');
-    } else if (!response.ok) {
+            return;
+        }
+        if (!response.ok) {
             showError(`Download failed (${response.status}).`);
-    } else {
+            return;
+        }
+
+        // Extract filename from Content-Disposition header
         const disposition = response.headers.get('Content-Disposition') || '';
         const filename = disposition.match(/filename="?([^"]+)"?/)?.[1] || 'download';
 
         setStatus('Decrypting\u2026');
-        const plaintext = await decryptFile(await response.arrayBuffer(), key);
+        const encrypted = new Uint8Array(await response.arrayBuffer());
+        const iv         = encrypted.slice(0, 12);
+        const ciphertext = encrypted.slice(12);
 
-        showPreview(filename, plaintext);
+        const plaintext = await crypto.subtle.decrypt({ name: 'AES-GCM', iv }, key, ciphertext);
-    }
-} catch (err) {
-    showError('Decryption failed: ' + err.message);
-}
 
-function setStatus(msg) {
+        // Trigger browser download
-    const el = htmx.find('#download-status');
+        const url = URL.createObjectURL(new Blob([plaintext]));
-    if (el) el.textContent = msg;
-}
-
-function escapeHtml(str) {
-    return str.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;').replace(/"/g, '&quot;');
-}
-
-function getMimeType(filename) {
-    const ext = filename.split('.').pop().toLowerCase();
-    const types = {
-        jpg: 'image/jpeg', jpeg: 'image/jpeg', png: 'image/png', gif: 'image/gif',
-        webp: 'image/webp', svg: 'image/svg+xml', bmp: 'image/bmp', ico: 'image/x-icon',
-        mp4: 'video/mp4', webm: 'video/webm', ogv: 'video/ogg', mov: 'video/quicktime',
-        mp3: 'audio/mpeg', wav: 'audio/wav', ogg: 'audio/ogg', flac: 'audio/flac',
-        aac: 'audio/aac', m4a: 'audio/mp4',
-        txt: 'text/plain', md: 'text/plain', csv: 'text/csv', log: 'text/plain',
-        json: 'application/json', xml: 'text/xml',
-        js: 'text/plain', ts: 'text/plain', py: 'text/plain', java: 'text/plain',
-        c: 'text/plain', cpp: 'text/plain', h: 'text/plain', sh: 'text/plain',
-        yaml: 'text/plain', yml: 'text/plain', toml: 'text/plain', ini: 'text/plain',
-        pdf: 'application/pdf',
-    };
-    return types[ext] || 'application/octet-stream';
-}
-
-function showPreview(filename, plaintext) {
-    const mimeType = getMimeType(filename);
-    const blob = new Blob([plaintext], { type: mimeType });
-    const url = URL.createObjectURL(blob);
-    window.addEventListener('unload', () => URL.revokeObjectURL(url));
-
-    const name = escapeHtml(filename);
-    const downloadBtn = `<button id="download-btn" class="btn btn-outline-success mt-2">Download</button>`;
-    let previewHtml;
-
-    if (mimeType.startsWith('image/')) {
-        previewHtml = `
-            <img src="${url}" alt="${name}" class="preview-media mb-3">
-            <div class="fw-medium mb-2">${name}</div>
-            ${downloadBtn}`;
-    } else if (mimeType.startsWith('video/')) {
-        previewHtml = `
-            <video src="${url}" controls class="preview-media mb-3"></video>
-            <div class="fw-medium mb-2">${name}</div>
-            ${downloadBtn}`;
-    } else if (mimeType.startsWith('audio/')) {
-        previewHtml = `
-            <div class="drop-zone-icon mb-3">&#x1F3B5;</div>
-            <div class="fw-medium mb-2">${name}</div>
-            <audio src="${url}" controls class="preview-audio mb-3"></audio>
-            ${downloadBtn}`;
-    } else if (mimeType === 'application/pdf') {
-        previewHtml = `
-            <div class="fw-medium mb-2">${name}</div>
-            <iframe src="${url}" class="preview-pdf mb-3"></iframe>
-            ${downloadBtn}`;
-    } else if (mimeType.startsWith('text/') || mimeType === 'application/json') {
-        const text = new TextDecoder().decode(plaintext);
-        const preview = text.length > 10000 ? text.slice(0, 10000) + '\n\u2026' : text;
-        previewHtml = `
-            <div class="fw-medium mb-2">${name}</div>
-            <pre class="preview-text mb-3">${escapeHtml(preview)}</pre>
-            ${downloadBtn}`;
-    } else {
-        previewHtml = `
-            <div class="drop-zone-icon mb-3">&#x1F4C4;</div>
-            <div class="fw-medium mb-2">${name}</div>
-            ${downloadBtn}`;
-    }
-
-    htmx.swap(htmx.find('#download-state'), previewHtml, { swapStyle: 'innerHTML' });
-
-    htmx.on(htmx.find('#download-btn'), 'click', () => {
         const a = document.createElement('a');
         a.href = url;
         a.download = filename;
         a.click();
+        URL.revokeObjectURL(url);
+
         showSuccess(filename);
-    });
+
+    } catch (err) {
+        showError('Decryption failed: ' + err.message);
+    }
+})();
+
+function setStatus(msg) {
+    const el = document.getElementById('download-status');
+    if (el) el.textContent = msg;
 }
 
 function showSuccess(filename) {
-    const name = escapeHtml(filename);
+    document.getElementById('download-state').innerHTML = `
-    htmx.swap(htmx.find('#download-state'), `
         <div class="drop-zone-icon mb-3">&#x2705;</div>
-        <div class="fw-medium mb-1">${name}</div>
+        <div class="fw-medium mb-1">${filename}</div>
         <div class="drop-zone-text mb-3">Your download has started.</div>
-        <a href="/" class="btn btn-link drop-zone-text text-decoration-none">Send a file</a>`,
+        <a href="/" class="btn btn-link drop-zone-text text-decoration-none">Send a file</a>`;
-        { swapStyle: 'innerHTML' });
 }
 
 function showError(msg) {
-    htmx.swap(htmx.find('#download-state'), `
+    document.getElementById('download-state').innerHTML = `
         <div class="drop-zone-icon mb-3">&#x26A0;</div>
-        <div class="drop-zone-text mb-3">${escapeHtml(msg)}</div>
+        <div class="drop-zone-text mb-3">${msg}</div>
-        <a href="/" class="btn btn-link drop-zone-text text-decoration-none">Go home</a>`,
+        <a href="/" class="btn btn-link drop-zone-text text-decoration-none">Go home</a>`;
-        { swapStyle: 'innerHTML' });
 }

Backend/src/main/resources/static/style.css

@@ -65,37 +65,3 @@ footer, footer a {
 footer a:hover {
     color: #8b949e;
 }
-
-.preview-media {
-    max-width: 100%;
-    border-radius: 8px;
-    display: block;
-    margin-left: auto;
-    margin-right: auto;
-}
-
-.preview-audio {
-    width: 100%;
-}
-
-.preview-pdf {
-    width: 100%;
-    height: 420px;
-    border: none;
-    border-radius: 8px;
-    display: block;
-}
-
-.preview-text {
-    text-align: left;
-    max-height: 320px;
-    overflow: auto;
-    background: #0d1117;
-    padding: 1rem;
-    border-radius: 8px;
-    font-size: 0.78rem;
-    color: #e6edf3;
-    border: 1px solid #30363d;
-    white-space: pre-wrap;
-    word-break: break-word;
-}

Backend/src/main/resources/static/upload.js

@@ -1,50 +1,54 @@
-const dropZone = htmx.find('#drop-zone');
+const dropZone = document.getElementById('drop-zone');
-const fileInput = htmx.find('#file-input');
+const fileInput = document.getElementById('file-input');
 const promptHtml = dropZone.innerHTML;
 
 let selectedFile = null;
 
-htmx.on(dropZone, 'click', () => {
+// ── File selection ────────────────────────────────────────────────────────────
+
+dropZone.addEventListener('click', () => {
     if (selectedFile === null) fileInput.click();
 });
 
-htmx.on(fileInput, 'change', e => {
+fileInput.addEventListener('change', e => {
     if (e.target.files[0]) onFileSelected(e.target.files[0]);
 });
 
-htmx.on(dropZone, 'dragover', e => {
+dropZone.addEventListener('dragover', e => {
     e.preventDefault();
-    htmx.addClass(dropZone, 'dragover');
+    dropZone.classList.add('dragover');
 });
 
-htmx.on(dropZone, 'dragleave', () => htmx.removeClass(dropZone, 'dragover'));
+dropZone.addEventListener('dragleave', () => dropZone.classList.remove('dragover'));
 
-htmx.on(dropZone, 'drop', e => {
+dropZone.addEventListener('drop', e => {
     e.preventDefault();
-    htmx.removeClass(dropZone, 'dragover');
+    dropZone.classList.remove('dragover');
     if (e.dataTransfer.files[0] && selectedFile === null) onFileSelected(e.dataTransfer.files[0]);
 });
 
 function onFileSelected(file) {
     selectedFile = file;
+    // Use htmx to fetch the options form — server renders max values from config
     htmx.ajax('GET', '/upload/options?name=' + encodeURIComponent(file.name), {
         target: '#drop-zone',
         swap: 'innerHTML'
     });
 }
 
-async function startUpload() {
+// ── Upload (called from onclick in server-rendered options form) ──────────────
-    const expiryDays    = htmx.find('#expiry-days')?.value;
-    const downloadLimit = htmx.find('#download-limit')?.value;
 
-    htmx.swap(dropZone, `
+async function startUpload() {
+    const expiryDays = document.getElementById('expiry-days')?.value;
+    const downloadLimit = document.getElementById('download-limit')?.value;
+
+    dropZone.innerHTML = `
         <div class="mb-3">
             <div class="spinner-border text-success" role="status">
                 <span class="visually-hidden">Loading\u2026</span>
             </div>
         </div>
-        <div class="drop-zone-text" id="upload-status">Encrypting\u2026</div>`,
+        <div class="drop-zone-text" id="upload-status">Encrypting\u2026</div>`;
-        { swapStyle: 'innerHTML' });
 
     try {
         const { payload, hash, base64urlKey } = await encryptFile(await selectedFile.arrayBuffer());
@@ -61,33 +65,38 @@ async function startUpload() {
         const response = await fetch('/upload', { method: 'POST', body: formData });
         if (!response.ok) throw new Error(`Server error ${response.status}`);
 
-        htmx.swap(dropZone, await response.text(), { swapStyle: 'innerHTML' });
+        // Server returns HTML fragment; prepend origin and append key fragment client-side
+        dropZone.innerHTML = await response.text();
         htmx.process(dropZone);
-        htmx.find('#share-link').value = window.location.origin + '/download#' + base64urlKey;
+        const shareLink = document.getElementById('share-link');
+        shareLink.value = window.location.origin + shareLink.value + '#' + base64urlKey;
 
     } catch (err) {
-        htmx.swap(dropZone, `
+        dropZone.innerHTML = `
             <div class="drop-zone-icon mb-3">&#x26A0;</div>
             <div class="drop-zone-text mb-3">${err.message}</div>
-            <button class="btn btn-link drop-zone-text text-decoration-none" onclick="resetUpload()">Try again</button>`,
+            <button class="btn btn-link drop-zone-text text-decoration-none" onclick="resetUpload()">Try again</button>`;
-            { swapStyle: 'innerHTML' });
     }
 }
 
 function setStatus(msg) {
-    const el = htmx.find('#upload-status');
+    const el = document.getElementById('upload-status');
     if (el) el.textContent = msg;
 }
 
+// ── Reset (called from onclick in server-rendered fragments) ──────────────────
+
 function resetUpload() {
     selectedFile = null;
     fileInput.value = '';
-    htmx.swap(dropZone, promptHtml, { swapStyle: 'innerHTML' });
+    dropZone.innerHTML = promptHtml;
 }
 
+// ── Copy link (called from onclick in result fragment) ────────────────────────
+
 async function copyLink() {
-    await navigator.clipboard.writeText(htmx.find('#share-link').value);
+    await navigator.clipboard.writeText(document.getElementById('share-link').value);
-    const btn = htmx.find('#copy-btn');
+    const btn = document.getElementById('copy-btn');
     btn.textContent = 'Copied!';
     setTimeout(() => { btn.textContent = 'Copy'; }, 2000);
 }

Backend/src/main/resources/templates/download/page.html

@@ -3,12 +3,10 @@
 <head>
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
-    <title>GTransfer</title>
+    <title th:text="${filename != null ? filename + ' — GTransfer' : 'GTransfer'}">GTransfer</title>
     <link rel="stylesheet" th:href="@{/webjars/bootstrap/dist/css/bootstrap.min.css}">
     <link rel="stylesheet" th:href="@{/style.css}">
-    <script th:src="@{/webjars/htmx.org/dist/htmx.min.js}" defer></script>
+    <script th:src="@{/download.js}" defer></script>
-    <script th:src="@{/crypto.js}" defer></script>
-    <script th:src="@{/download.js}" type="module"></script>
 </head>
 <body class="d-flex flex-column min-vh-100">
 
@@ -20,6 +18,7 @@
     <main class="flex-grow-1 d-flex align-items-center justify-content-center py-5 px-3">
         <div id="download-state" class="drop-zone text-center py-5 px-4" style="max-width: 520px; width: 100%;">
             <div class="drop-zone-icon mb-3">&#x1F512;</div>
+            <div class="fw-medium mb-2" th:if="${filename != null}" th:text="${filename}"></div>
             <div class="drop-zone-text" id="download-status">Preparing&hellip;</div>
         </div>
     </main>

Backend/src/main/resources/templates/index.html

@@ -28,7 +28,7 @@
                 </p>
             </div>
             <div class="col-lg-7 d-flex justify-content-center justify-content-lg-end">
-                <input type="file" id="file-input" accept="*/*" hidden>
+                <input type="file" id="file-input" hidden>
                 <div id="drop-zone" class="drop-zone text-center py-5 px-4 w-100">
                     <div class="drop-zone-icon mb-3">&#x1F4C2;</div>
                     <div class="mb-2">

Backend/src/main/resources/templates/upload/result.html

@@ -5,7 +5,8 @@
     <div class="drop-zone-icon mb-3">&#x2705;</div>
     <div class="drop-zone-text mb-3">Your file is ready to share</div>
     <div class="input-group mb-2">
-        <input type="text" id="share-link" class="form-control form-control-sm" readonly>
+        <input type="text" id="share-link" class="form-control form-control-sm"
+               th:value="@{/download/{id}(id=${id})}" readonly>
         <button id="copy-btn" class="btn btn-outline-success btn-sm" onclick="copyLink()">Copy</button>
     </div>
     <button class="btn btn-link drop-zone-text text-decoration-none small" onclick="resetUpload()">

Dockerfile

@@ -1,12 +0,0 @@
-FROM postgres:15.17-trixie
-RUN apt update
-RUN apt install -y curl wget zip unzip build-essential zlib1g-dev nodejs ssh
-RUN curl -s "https://get.sdkman.io?ci=true" | bash
-SHELL ["/bin/bash", "-c"]
-RUN source "/root/.sdkman/bin/sdkman-init.sh" \
-  && sdk install java 25.0.2-graalce \
-  && sdk install gradle
-ENV POSTGRES_PASSWORD=gtransfer
-ENV POSTGRES_USER=gtransfer
-ENV POSTGRES_DB=gtransfer
-ENTRYPOINT ["/bin/bash"]

LICENSE

@@ -1,339 +0,0 @@
-                    GNU GENERAL PUBLIC LICENSE
-                       Version 2, June 1991
-
- Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
- 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- Everyone is permitted to copy and distribute verbatim copies
- of this license document, but changing it is not allowed.
-
-                            Preamble
-
-  The licenses for most software are designed to take away your
-freedom to share and change it.  By contrast, the GNU General Public
-License is intended to guarantee your freedom to share and change free
-software--to make sure the software is free for all its users.  This
-General Public License applies to most of the Free Software
-Foundation's software and to any other program whose authors commit to
-using it.  (Some other Free Software Foundation software is covered by
-the GNU Lesser General Public License instead.)  You can apply it to
-your programs, too.
-
-  When we speak of free software, we are referring to freedom, not
-price.  Our General Public Licenses are designed to make sure that you
-have the freedom to distribute copies of free software (and charge for
-this service if you wish), that you receive source code or can get it
-if you want it, that you can change the software or use pieces of it
-in new free programs; and that you know you can do these things.
-
-  To protect your rights, we need to make restrictions that forbid
-anyone to deny you these rights or to ask you to surrender the rights.
-These restrictions translate to certain responsibilities for you if you
-distribute copies of the software, or if you modify it.
-
-  For example, if you distribute copies of such a program, whether
-gratis or for a fee, you must give the recipients all the rights that
-you have.  You must make sure that they, too, receive or can get the
-source code.  And you must show them these terms so they know their
-rights.
-
-  We protect your rights with two steps: (1) copyright the software, and
-(2) offer you this license which gives you legal permission to copy,
-distribute and/or modify the software.
-
-  Also, for each author's protection and ours, we want to make certain
-that everyone understands that there is no warranty for this free
-software.  If the software is modified by someone else and passed on, we
-want its recipients to know that what they have is not the original, so
-that any problems introduced by others will not reflect on the original
-authors' reputations.
-
-  Finally, any free program is threatened constantly by software
-patents.  We wish to avoid the danger that redistributors of a free
-program will individually obtain patent licenses, in effect making the
-program proprietary.  To prevent this, we have made it clear that any
-patent must be licensed for everyone's free use or not licensed at all.
-
-  The precise terms and conditions for copying, distribution and
-modification follow.
-
-                    GNU GENERAL PUBLIC LICENSE
-   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
-
-  0. This License applies to any program or other work which contains
-a notice placed by the copyright holder saying it may be distributed
-under the terms of this General Public License.  The "Program", below,
-refers to any such program or work, and a "work based on the Program"
-means either the Program or any derivative work under copyright law:
-that is to say, a work containing the Program or a portion of it,
-either verbatim or with modifications and/or translated into another
-language.  (Hereinafter, translation is included without limitation in
-the term "modification".)  Each licensee is addressed as "you".
-
-Activities other than copying, distribution and modification are not
-covered by this License; they are outside its scope.  The act of
-running the Program is not restricted, and the output from the Program
-is covered only if its contents constitute a work based on the
-Program (independent of having been made by running the Program).
-Whether that is true depends on what the Program does.
-
-  1. You may copy and distribute verbatim copies of the Program's
-source code as you receive it, in any medium, provided that you
-conspicuously and appropriately publish on each copy an appropriate
-copyright notice and disclaimer of warranty; keep intact all the
-notices that refer to this License and to the absence of any warranty;
-and give any other recipients of the Program a copy of this License
-along with the Program.
-
-You may charge a fee for the physical act of transferring a copy, and
-you may at your option offer warranty protection in exchange for a fee.
-
-  2. You may modify your copy or copies of the Program or any portion
-of it, thus forming a work based on the Program, and copy and
-distribute such modifications or work under the terms of Section 1
-above, provided that you also meet all of these conditions:
-
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-
-    b) You must cause any work that you distribute or publish, that in
-    whole or in part contains or is derived from the Program or any
-    part thereof, to be licensed as a whole at no charge to all third
-    parties under the terms of this License.
-
-    c) If the modified program normally reads commands interactively
-    when run, you must cause it, when started running for such
-    interactive use in the most ordinary way, to print or display an
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-    a warranty) and that users may redistribute the program under
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-    does not normally print such an announcement, your work based on
-    the Program is not required to print an announcement.)
-
-These requirements apply to the modified work as a whole.  If
-identifiable sections of that work are not derived from the Program,
-and can be reasonably considered independent and separate works in
-themselves, then this License, and its terms, do not apply to those
-sections when you distribute them as separate works.  But when you
-distribute the same sections as part of a whole which is a work based
-on the Program, the distribution of the whole must be on the terms of
-this License, whose permissions for other licensees extend to the
-entire whole, and thus to each and every part regardless of who wrote it.
-
-Thus, it is not the intent of this section to claim rights or contest
-your rights to work written entirely by you; rather, the intent is to
-exercise the right to control the distribution of derivative or
-collective works based on the Program.
-
-In addition, mere aggregation of another work not based on the Program
-with the Program (or with a work based on the Program) on a volume of
-a storage or distribution medium does not bring the other work under
-the scope of this License.
-
-  3. You may copy and distribute the Program (or a work based on it,
-under Section 2) in object code or executable form under the terms of
-Sections 1 and 2 above provided that you also do one of the following:
-
-    a) Accompany it with the complete corresponding machine-readable
-    source code, which must be distributed under the terms of Sections
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-    b) Accompany it with a written offer, valid for at least three
-    years, to give any third party, for a charge no more than your
-    cost of physically performing source distribution, a complete
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-    c) Accompany it with the information you received as to the offer
-    to distribute corresponding source code.  (This alternative is
-    allowed only for noncommercial distribution and only if you
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-    an offer, in accord with Subsection b above.)
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-distribution of the source code, even though third parties are not
-compelled to copy the source along with the object code.
-
-  4. You may not copy, modify, sublicense, or distribute the Program
-except as expressly provided under this License.  Any attempt
-otherwise to copy, modify, sublicense or distribute the Program is
-void, and will automatically terminate your rights under this License.
-However, parties who have received copies, or rights, from you under
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-parties remain in full compliance.
-
-  5. You are not required to accept this License, since you have not
-signed it.  However, nothing else grants you permission to modify or
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-prohibited by law if you do not accept this License.  Therefore, by
-modifying or distributing the Program (or any work based on the
-Program), you indicate your acceptance of this License to do so, and
-all its terms and conditions for copying, distributing or modifying
-the Program or works based on it.
-
-  6. Each time you redistribute the Program (or any work based on the
-Program), the recipient automatically receives a license from the
-original licensor to copy, distribute or modify the Program subject to
-these terms and conditions.  You may not impose any further
-restrictions on the recipients' exercise of the rights granted herein.
-You are not responsible for enforcing compliance by third parties to
-this License.
-
-  7. If, as a consequence of a court judgment or allegation of patent
-infringement or for any other reason (not limited to patent issues),
-conditions are imposed on you (whether by court order, agreement or
-otherwise) that contradict the conditions of this License, they do not
-excuse you from the conditions of this License.  If you cannot
-distribute so as to satisfy simultaneously your obligations under this
-License and any other pertinent obligations, then as a consequence you
-may not distribute the Program at all.  For example, if a patent
-license would not permit royalty-free redistribution of the Program by
-all those who receive copies directly or indirectly through you, then
-the only way you could satisfy both it and this License would be to
-refrain entirely from distribution of the Program.
-
-If any portion of this section is held invalid or unenforceable under
-any particular circumstance, the balance of the section is intended to
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-
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-such claims; this section has the sole purpose of protecting the
-integrity of the free software distribution system, which is
-implemented by public license practices.  Many people have made
-generous contributions to the wide range of software distributed
-through that system in reliance on consistent application of that
-system; it is up to the author/donor to decide if he or she is willing
-to distribute software through any other system and a licensee cannot
-impose that choice.
-
-This section is intended to make thoroughly clear what is believed to
-be a consequence of the rest of this License.
-
-  8. If the distribution and/or use of the Program is restricted in
-certain countries either by patents or by copyrighted interfaces, the
-original copyright holder who places the Program under this License
-may add an explicit geographical distribution limitation excluding
-those countries, so that distribution is permitted only in or among
-countries not thus excluded.  In such case, this License incorporates
-the limitation as if written in the body of this License.
-
-  9. The Free Software Foundation may publish revised and/or new versions
-of the General Public License from time to time.  Such new versions will
-be similar in spirit to the present version, but may differ in detail to
-address new problems or concerns.
-
-Each version is given a distinguishing version number.  If the Program
-specifies a version number of this License which applies to it and "any
-later version", you have the option of following the terms and conditions
-either of that version or of any later version published by the Free
-Software Foundation.  If the Program does not specify a version number of
-this License, you may choose any version ever published by the Free Software
-Foundation.
-
-  10. If you wish to incorporate parts of the Program into other free
-programs whose distribution conditions are different, write to the author
-to ask for permission.  For software which is copyrighted by the Free
-Software Foundation, write to the Free Software Foundation; we sometimes
-make exceptions for this.  Our decision will be guided by the two goals
-of preserving the free status of all derivatives of our free software and
-of promoting the sharing and reuse of software generally.
-
-                            NO WARRANTY
-
-  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
-FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
-OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
-PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
-OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
-MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
-TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
-PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
-REPAIR OR CORRECTION.
-
-  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
-WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
-REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
-INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
-OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
-TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
-YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
-PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
-POSSIBILITY OF SUCH DAMAGES.
-
-                     END OF TERMS AND CONDITIONS
-
-            How to Apply These Terms to Your New Programs
-
-  If you develop a new program, and you want it to be of the greatest
-possible use to the public, the best way to achieve this is to make it
-free software which everyone can redistribute and change under these terms.
-
-  To do so, attach the following notices to the program.  It is safest
-to attach them to the start of each source file to most effectively
-convey the exclusion of warranty; and each file should have at least
-the "copyright" line and a pointer to where the full notice is found.
-
-    <one line to give the program's name and a brief idea of what it does.>
-    Copyright (C) <year>  <name of author>
-
-    This program is free software; you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation; either version 2 of the License, or
-    (at your option) any later version.
-
-    This program is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU General Public License for more details.
-
-    You should have received a copy of the GNU General Public License along
-    with this program; if not, write to the Free Software Foundation, Inc.,
-    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-
-Also add information on how to contact you by electronic and paper mail.
-
-If the program is interactive, make it output a short notice like this
-when it starts in an interactive mode:
-
-    Gnomovision version 69, Copyright (C) year name of author
-    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
-    This is free software, and you are welcome to redistribute it
-    under certain conditions; type `show c' for details.
-
-The hypothetical commands `show w' and `show c' should show the appropriate
-parts of the General Public License.  Of course, the commands you use may
-be called something other than `show w' and `show c'; they could even be
-mouse-clicks or menu items--whatever suits your program.
-
-You should also get your employer (if you work as a programmer) or your
-school, if any, to sign a "copyright disclaimer" for the program, if
-necessary.  Here is a sample; alter the names:
-
-  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
-  `Gnomovision' (which makes passes at compilers) written by James Hacker.
-
-  <signature of Ty Coon>, 1 April 1989
-  Ty Coon, President of Vice
-
-This General Public License does not permit incorporating your program into
-proprietary programs.  If your program is a subroutine library, you may
-consider it more useful to permit linking proprietary applications with the
-library.  If this is what you want to do, use the GNU Lesser General
-Public License instead of this License.

README.md

@@ -1,47 +0,0 @@
-# GTransfer
-
-A self-hosted, end-to-end encrypted file transfer service. The server stores only ciphertext and never has access to encryption keys or plaintext.
-
-### [Canonical Repo Url](https://gitea.gregorlohaus.com/gregor/gtransfer)
-
-## Encryption flow
-
-### Upload
-
-1. **Key generation** — the browser generates a random 256-bit AES-GCM key using the [Web Crypto API](https://developer.mozilla.org/en-US/docs/Web/API/Web_Crypto_API). The key never leaves the browser.
-
-2. **Encryption** — the file is encrypted with AES-GCM. A random 96-bit (12-byte) IV is generated for each upload. The IV is prepended to the ciphertext to produce the payload:
-   ```
-   payload = IV (12 bytes) || ciphertext
-   ```
-
-3. **File ID** — the server needs a way to identify the file without knowing the key. The client computes `SHA-256(rawKey)` and uses the hex digest as the file ID. This is a one-way operation — the server cannot reverse it to obtain the key.
-
-4. **Upload** — the encrypted payload and file ID are sent to the server. The server stores the ciphertext and records the file ID, name, expiry, and download limit in the database.
-
-5. **Share link** — the raw key is base64url-encoded and placed in the [URL fragment](https://developer.mozilla.org/en-US/docs/Web/API/URL/hash):
-   ```
-   https://example.com/download#<base64url(rawKey)>
-   ```
-   Browsers never include the fragment in HTTP requests, so the key is never transmitted to the server.
-
-### Download
-
-1. **Key extraction** — the browser reads the key from the URL fragment and decodes it from base64url.
-
-2. **File lookup** — the client computes `SHA-256(rawKey)` to derive the file ID and fetches the encrypted payload from `/download/<id>/data`.
-
-3. **Decryption** — the IV is read from the first 12 bytes of the payload, and the remainder is decrypted with AES-GCM. AES-GCM is authenticated encryption, so any tampering with the ciphertext causes decryption to fail with an authentication error.
-
-4. **Download** — the plaintext is written to a `Blob` and the browser is prompted to save it.
-
-### Security properties
-
-| Property | Detail |
-|---|---|
-| Encryption | AES-256-GCM |
-| IV | 96-bit random, unique per upload |
-| Key derivation | None — key is randomly generated |
-| File ID | SHA-256(rawKey) — server cannot reverse to key |
-| Key transport | URL fragment — never sent to server |
-| Server access | Ciphertext, file metadata, SHA-256 of key only |

devenv.lock

@@ -17,62 +17,6 @@
         "type": "github"
       }
     },
-    "flake-compat": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1767039857,
-        "owner": "NixOS",
-        "repo": "flake-compat",
-        "rev": "5edf11c44bc78a0d334f6334cdaf7d60d732daab",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "repo": "flake-compat",
-        "type": "github"
-      }
-    },
-    "git-hooks": {
-      "inputs": {
-        "flake-compat": "flake-compat",
-        "gitignore": "gitignore",
-        "nixpkgs": [
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1772024342,
-        "owner": "cachix",
-        "repo": "git-hooks.nix",
-        "rev": "6e34e97ed9788b17796ee43ccdbaf871a5c2b476",
-        "type": "github"
-      },
-      "original": {
-        "owner": "cachix",
-        "repo": "git-hooks.nix",
-        "type": "github"
-      }
-    },
-    "gitignore": {
-      "inputs": {
-        "nixpkgs": [
-          "git-hooks",
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1762808025,
-        "owner": "hercules-ci",
-        "repo": "gitignore.nix",
-        "rev": "cb5e3fdca1de58ccbc3ef53de65bd372b48f567c",
-        "type": "github"
-      },
-      "original": {
-        "owner": "hercules-ci",
-        "repo": "gitignore.nix",
-        "type": "github"
-      }
-    },
     "nixpkgs": {
       "inputs": {
         "nixpkgs-src": "nixpkgs-src"
@@ -112,11 +56,7 @@
     "root": {
       "inputs": {
         "devenv": "devenv",
-        "git-hooks": "git-hooks",
+        "nixpkgs": "nixpkgs"
-        "nixpkgs": "nixpkgs",
-        "pre-commit-hooks": [
-          "git-hooks"
-        ]
       }
     }
   },

devenv.nix

@@ -36,9 +36,9 @@
   scripts.build-backend.exec = ''
     gradle -p ./Backend build && echo $(date) > ./Backend/buildcompleted.at
   '';
-  # enterShell = ''
+
-  #   PATH="$(pwd)/x86_64-linux-musl-native/bin:$PATH"
+  enterShell = ''
-  # '';
+  '';
 
   # https://devenv.sh/tasks/
   # tasks = {

layout.kdl

@@ -0,0 +1,337 @@
+layout {
+    cwd "/home/anon"
+    tab name="Tab #1" focus=true {
+        pane size=1 borderless=true {
+            plugin location="zellij:tab-bar"
+        }
+        pane command="devenv" cwd="Dev/GTransfer" {
+            args "shell"
+        }
+        pane size=1 borderless=true {
+            plugin location="zellij:status-bar"
+        }
+        floating_panes {
+            pane command="devenv" cwd="Dev/GTransfer" {
+                height 30
+                width 170
+                x 85
+                y 16
+                args "up"
+            }
+            pane command="hx" cwd=".config/gtransfer" {
+                height 30
+                width 170
+                x 87
+                y 18
+                args "config.toml"
+            }
+            pane command="devenv" cwd="Dev/GTransfer" {
+                height 30
+                width 170
+                x 89
+                y 20
+                args "shell"
+            }
+            pane command="claude" cwd="Dev/GTransfer" {
+                height 30
+                width 170
+                x 91
+                y 22
+                args "."
+            }
+            pane command="yy" cwd="Dev/GTransfer" {
+                height 30
+                width 170
+                x 93
+                y 24
+            }
+        }
+    }
+    new_tab_template {
+        pane size=1 borderless=true {
+            plugin location="zellij:tab-bar"
+        }
+        pane cwd="/home/anon"
+        pane size=1 borderless=true {
+            plugin location="zellij:status-bar"
+        }
+    }
+    swap_tiled_layout name="vertical" {
+        tab max_panes=5 {
+            pane size=1 borderless=true {
+                plugin location="tab-bar"
+            }
+            pane {
+                pane split_direction="vertical" {
+                    pane
+                    pane {
+                        children
+                    }
+                }
+            }
+            pane size=1 borderless=true {
+                plugin location="status-bar"
+            }
+        }
+        tab max_panes=8 {
+            pane size=1 borderless=true {
+                plugin location="tab-bar"
+            }
+            pane {
+                pane split_direction="vertical" {
+                    pane {
+                        children
+                    }
+                    pane {
+                        pane
+                        pane
+                        pane
+                        pane
+                    }
+                }
+            }
+            pane size=1 borderless=true {
+                plugin location="status-bar"
+            }
+        }
+        tab max_panes=12 {
+            pane size=1 borderless=true {
+                plugin location="tab-bar"
+            }
+            pane {
+                pane split_direction="vertical" {
+                    pane {
+                        children
+                    }
+                    pane {
+                        pane
+                        pane
+                        pane
+                        pane
+                    }
+                    pane {
+                        pane
+                        pane
+                        pane
+                        pane
+                    }
+                }
+            }
+            pane size=1 borderless=true {
+                plugin location="status-bar"
+            }
+        }
+    }
+    swap_tiled_layout name="horizontal" {
+        tab max_panes=4 {
+            pane size=1 borderless=true {
+                plugin location="tab-bar"
+            }
+            pane {
+                pane
+                pane
+            }
+            pane size=1 borderless=true {
+                plugin location="status-bar"
+            }
+        }
+        tab max_panes=8 {
+            pane size=1 borderless=true {
+                plugin location="tab-bar"
+            }
+            pane {
+                pane {
+                    pane split_direction="vertical" {
+                        children
+                    }
+                    pane split_direction="vertical" {
+                        pane
+                        pane
+                        pane
+                        pane
+                    }
+                }
+            }
+            pane size=1 borderless=true {
+                plugin location="status-bar"
+            }
+        }
+        tab max_panes=12 {
+            pane size=1 borderless=true {
+                plugin location="tab-bar"
+            }
+            pane {
+                pane {
+                    pane split_direction="vertical" {
+                        children
+                    }
+                    pane split_direction="vertical" {
+                        pane
+                        pane
+                        pane
+                        pane
+                    }
+                    pane split_direction="vertical" {
+                        pane
+                        pane
+                        pane
+                        pane
+                    }
+                }
+            }
+            pane size=1 borderless=true {
+                plugin location="status-bar"
+            }
+        }
+    }
+    swap_tiled_layout name="stacked" {
+        tab min_panes=5 {
+            pane size=1 borderless=true {
+                plugin location="tab-bar"
+            }
+            pane {
+                pane split_direction="vertical" {
+                    pane
+                    pane stacked=true {
+                        children
+                    }
+                }
+            }
+            pane size=1 borderless=true {
+                plugin location="status-bar"
+            }
+        }
+    }
+    swap_floating_layout name="staggered" {
+        floating_panes {
+        }
+    }
+    swap_floating_layout name="enlarged" {
+        floating_panes max_panes=10 {
+            pane cwd="/home/anon" {
+                height "90%"
+                width "90%"
+                x "5%"
+                y 1
+            }
+            pane cwd="/home/anon" {
+                height "90%"
+                width "90%"
+                x "5%"
+                y 2
+            }
+            pane cwd="/home/anon" {
+                height "90%"
+                width "90%"
+                x "5%"
+                y 3
+            }
+            pane cwd="/home/anon" {
+                height "90%"
+                width "90%"
+                x "5%"
+                y 4
+            }
+            pane cwd="/home/anon" {
+                height "90%"
+                width "90%"
+                x "5%"
+                y 5
+            }
+            pane cwd="/home/anon" {
+                height "90%"
+                width "90%"
+                x "5%"
+                y 6
+            }
+            pane cwd="/home/anon" {
+                height "90%"
+                width "90%"
+                x "5%"
+                y 7
+            }
+            pane cwd="/home/anon" {
+                height "90%"
+                width "90%"
+                x "5%"
+                y 8
+            }
+            pane cwd="/home/anon" {
+                height "90%"
+                width "90%"
+                x "5%"
+                y 9
+            }
+            pane cwd="/home/anon" {
+                height "90%"
+                width "90%"
+                x 10
+                y 10
+            }
+        }
+    }
+    swap_floating_layout name="spread" {
+        floating_panes max_panes=1 {
+            pane cwd="/home/anon" {
+                x "50%"
+                y "50%"
+            }
+        }
+        floating_panes max_panes=2 {
+            pane cwd="/home/anon" {
+                width "45%"
+                x "1%"
+                y "25%"
+            }
+            pane cwd="/home/anon" {
+                width "45%"
+                x "50%"
+                y "25%"
+            }
+        }
+        floating_panes max_panes=3 {
+            pane cwd="/home/anon" {
+                height "45%"
+                width "45%"
+                y "55%"
+            }
+            pane cwd="/home/anon" {
+                width "45%"
+                x "1%"
+                y "1%"
+            }
+            pane cwd="/home/anon" {
+                width "45%"
+                x "50%"
+                y "1%"
+            }
+        }
+        floating_panes max_panes=4 {
+            pane cwd="/home/anon" {
+                height "45%"
+                width "45%"
+                x "1%"
+                y "55%"
+            }
+            pane cwd="/home/anon" {
+                height "45%"
+                width "45%"
+                x "50%"
+                y "55%"
+            }
+            pane cwd="/home/anon" {
+                height "45%"
+                width "45%"
+                x "1%"
+                y "1%"
+            }
+            pane cwd="/home/anon" {
+                height "45%"
+                width "45%"
+                x "50%"
+                y "1%"
+            }
+        }
+    }
+}
+