Fix cURL Error 26 (SSE Size Mismatch)

lib/BackgroundJobs/IndexerJob.php

@@ -239,6 +239,7 @@ protected function index(array $files): void {
 				$file->getMtime(),
 				$file->getMimeType(),
 				ProviderConfigService::getDefaultProviderKey(),
+				(int)$fileSize,
 			);
 			$allSourceIds[] = ProviderConfigService::getSourceId($file->getId());
 

lib/Service/LangRopeService.php

@@ -60,7 +60,7 @@ private function requestToExApp(
 
 		// todo: app_api is always available now (composer update)
 		try {
-			$appApiFunctions = \OCP\Server::get(\OCA\AppAPI\PublicFunctions::class);
+			$appApiFunctions = $this->getAppApiFunctions();
 		} catch (ContainerExceptionInterface|NotFoundExceptionInterface $e) {
 			throw new RuntimeException('Could not get AppAPI public functions');
 		}
@@ -287,10 +287,24 @@ public function indexSources(array $sources): array {
 		}
 
 		$params = array_map(function (Source $source) {
+			$contents = $source->content;
+			if ($source->size !== null) {
+				if (class_exists('\GuzzleHttp\Psr7\Utils')) {
+					$stream = \GuzzleHttp\Psr7\Utils::streamFor($source->content);
+				} else {
+					$stream = \GuzzleHttp\Psr7\stream_for($source->content);
+				}
+				$contents = \GuzzleHttp\Psr7\FnStream::decorate($stream, [
+					'getSize' => function () use ($source) {
+						return $source->size;
+					},
+				]);
+			}
+
 			return [
 				'name' => 'sources',
 				'filename' => $source->reference, // eg. 'files__default: 555'
-				'contents' => $source->content,
+				'contents' => $contents,
 				'headers' => [
 					'userIds' => implode(',', $source->userIds),
 					'title' => $source->title,
@@ -424,4 +438,8 @@ public function getWithPresentableSources(string $llmResponse, string ...$source
 
 		return $llmResponse . $output;
 	}
+
+	protected function getAppApiFunctions() {
+		return \OCP\Server::get(\OCA\AppAPI\PublicFunctions::class);
+	}
 }

lib/Service/ScanService.php

@@ -39,6 +39,15 @@ public function scanUserFiles(string $userId, array $mimeTypeFilter, ?string $di
 			$userFolder = $this->root->getUserFolder($userId)->get($directory);
 		}
 
+		if ($userFolder instanceof File) {
+			$source = $this->getSourceFromFile($mimeTypeFilter, $userFolder);
+			if ($source !== null) {
+				$this->langRopeService->indexSources([$source]);
+				yield $source;
+			}
+			return [];
+		}
+
 		yield from ($this->scanDirectory($mimeTypeFilter, $userFolder));
 		return [];
 	}
@@ -123,6 +132,7 @@ public function getSourceFromFile(array $mimeTypeFilter, File $node): ?Source {
 			$node->getMTime(),
 			$node->getMimeType(),
 			$providerKey,
+			(int)$node->getSize(),
 		);
 	}
 }

lib/Type/Source.php

@@ -16,6 +16,7 @@ public function __construct(
 		public int|string $modified,
 		public string $type,
 		public string $provider,
+		public ?int $size = null,
 	) {
 	}
 }

mock_server.log

@@ -0,0 +1,11 @@
+ * Serving Flask app 'mock_server'
+ * Debug mode: off
+WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead.
+ * Running on all addresses (0.0.0.0)
+ * Running on http://127.0.0.1:23000
+ * Running on http://192.168.0.2:23000
+Press CTRL+C to quit
+127.0.0.1 - - [05/Feb/2026 19:24:49] "PUT /loadSources HTTP/1.1" 200 -
+127.0.0.1 - - [05/Feb/2026 19:31:28] "PUT /loadSources HTTP/1.1" 400 -
+127.0.0.1 - - [05/Feb/2026 19:32:18] "PUT /loadSources HTTP/1.1" 200 -
+127.0.0.1 - - [05/Feb/2026 19:32:20] "PUT /loadSources HTTP/1.1" 400 -

tests/reproduction/create_test_file.php

@@ -0,0 +1,26 @@
+<?php
+define('NC_CLI_MODE', true);
+require_once '/var/www/html/lib/base.php';
+
+use OCP\Server;
+use OCP\Files\IRootFolder;
+
+try {
+    $rootFolder = Server::get(IRootFolder::class);
+    $userFolder = $rootFolder->getUserFolder('admin');
+
+    if ($userFolder->nodeExists('test.txt')) {
+        $file = $userFolder->get('test.txt');
+        $file->delete();
+    }
+
+    $file = $userFolder->newFile('test.txt');
+    // Write 1MB of data
+    $file->putContent(str_repeat('A', 1024 * 1024));
+
+    echo "Created encrypted test.txt successfully.\n";
+
+} catch (\Exception $e) {
+    echo "Error creating file: " . $e->getMessage() . "\n";
+    exit(1);
+}

tests/reproduction/debug_sizes.php

@@ -0,0 +1,36 @@
+<?php
+define('NC_CLI_MODE', true);
+require_once '/var/www/html/lib/base.php';
+
+use OCP\Server;
+use OCP\Files\IRootFolder;
+
+function checkFile($path) {
+    try {
+        $rootFolder = Server::get(IRootFolder::class);
+        $userFolder = $rootFolder->getUserFolder('admin');
+        if (!$userFolder->nodeExists($path)) {
+            echo "File $path not found.\n";
+            return;
+        }
+        $file = $userFolder->get($path);
+
+        $reportedSize = $file->getSize();
+        echo "File::getSize() for $path: " . $reportedSize . "\n";
+
+        $handle = $file->fopen('rb');
+        $stat = fstat($handle);
+        echo "fstat()['size'] for $path: " . $stat['size'] . "\n";
+
+        $contents = stream_get_contents($handle);
+        $actualReadSize = strlen($contents);
+        echo "Actual Read Size for $path: " . $actualReadSize . "\n";
+
+        echo "Mismatch for $path: " . ($reportedSize - $actualReadSize) . "\n";
+    } catch (\Exception $e) {
+        echo "Error checking $path: " . $e->getMessage() . "\n";
+    }
+}
+
+checkFile('test.txt');
+checkFile('Nextcloud Manual.pdf'); // Check the default file too

tests/reproduction/docker-compose.yml

@@ -0,0 +1,20 @@
+services:
+  nextcloud:
+    image: nextcloud:latest
+    environment:
+      - NEXTCLOUD_ADMIN_USER=admin
+      - NEXTCLOUD_ADMIN_PASSWORD=password
+    volumes:
+      - ../../:/var/www/html/custom_apps/context_chat
+    ports:
+      - "8080:80"
+
+  context_chat_backend:
+    image: python:3.9-slim
+    command: sh -c "pip install flask && python /mock_server.py"
+    volumes:
+      - ./mock_server.py:/mock_server.py
+    networks:
+      default:
+        aliases:
+          - context_chat_backend

tests/reproduction/mock_server.py

@@ -0,0 +1,33 @@
+from flask import Flask, request, jsonify
+import sys
+
+app = Flask(__name__)
+
+@app.route('/heartbeat', methods=['GET'])
+def heartbeat():
+    return jsonify({"status": "ok"}), 200
+
+@app.route('/loadSources', methods=['PUT'])
+def load_sources():
+    content_length = request.headers.get('Content-Length')
+    if content_length:
+        content_length = int(content_length)
+
+    body = request.get_data()
+    actual_length = len(body)
+
+    print(f"Header Content-Length: {content_length}")
+    print(f"Actual Body Length: {actual_length}")
+
+    if content_length is not None and content_length != actual_length:
+        print("FAIL: Size Mismatch")
+        return jsonify({"error": "Size Mismatch"}), 400
+
+    print("SUCCESS")
+    return jsonify({
+        "loaded_sources": ["test_source"],
+        "sources_to_retry": []
+    }), 200
+
+if __name__ == '__main__':
+    app.run(host='0.0.0.0', port=23000)

tests/reproduction/register_mock.php

@@ -0,0 +1,52 @@
+<?php
+define('NC_CLI_MODE', true);
+require_once '/var/www/html/console.php';
+
+use OCP\Server;
+use OCA\AppAPI\Db\ExApp;
+use OCA\AppAPI\Db\ExAppMapper;
+
+try {
+    if (!class_exists(ExAppMapper::class)) {
+        echo "AppAPI classes not found.\n";
+        exit(1);
+    }
+
+    $mapper = Server::get(ExAppMapper::class);
+
+    // Try to find existing
+    try {
+        $existing = $mapper->find('context_chat_backend');
+        $mapper->delete($existing);
+        echo "Deleted existing registration.\n";
+    } catch (\Exception $e) {
+        // Not found, ignore
+    }
+
+    $exApp = new ExApp();
+    $exApp->setAppId('context_chat_backend');
+    $exApp->setName('Context Chat Backend');
+    $exApp->setDeployMethod('manual_install');
+    $exApp->setVersion('1.0.0');
+    $exApp->setEnabled(1);
+    $exApp->setHost('context_chat_backend');
+    $exApp->setPort(23000);
+    $exApp->setProtocol('http');
+    $exApp->setSecret('secret');
+    $exApp->setHash('hash');
+    $exApp->setLastUpdated(time());
+
+    // Set other required fields if any (based on standard ExApp entity)
+    // Some versions require 'scopes' or 'daemon_config_name'
+    if (method_exists($exApp, 'setDaemonConfigName')) {
+        $exApp->setDaemonConfigName('manual_install');
+    }
+
+    $mapper->insert($exApp);
+
+    echo "Registered context_chat_backend successfully via Mapper.\n";
+
+} catch (\Exception $e) {
+    echo "Error registering app: " . $e->getMessage() . "\n";
+    exit(1);
+}

tests/reproduction/run_test.sh

@@ -0,0 +1,104 @@
+#!/bin/bash
+set -e
+
+# Start containers
+docker-compose up -d
+
+echo "Waiting for container to accept commands..."
+sleep 10
+
+# Check if Nextcloud is installed
+echo "Checking Nextcloud status..."
+if docker-compose exec -u 33 nextcloud php occ status | grep -q "installed: true"; then
+    echo "Nextcloud is already installed."
+else
+    echo "Nextcloud is not installed. Installing..."
+    docker-compose exec -u 33 nextcloud php occ maintenance:install \
+        --database "sqlite" \
+        --admin-user "admin" \
+        --admin-pass "password"
+fi
+
+echo "Waiting for Nextcloud to be fully ready..."
+max_retries=10
+count=0
+while [ $count -lt $max_retries ]; do
+    if docker-compose exec -u 33 nextcloud php occ status | grep -q "installed: true"; then
+        echo "Nextcloud is ready."
+        break
+    fi
+    echo "Waiting for status update... (Attempt $((count+1))/$max_retries)"
+    sleep 5
+    count=$((count+1))
+done
+
+if [ $count -eq $max_retries ]; then
+    echo "Timeout waiting for Nextcloud to be ready."
+    exit 1
+fi
+
+echo "Configuring Nextcloud..."
+
+# Enable encryption
+docker-compose exec -u 33 nextcloud php occ app:enable encryption
+docker-compose exec -u 33 nextcloud php occ encryption:enable
+docker-compose exec -u 33 nextcloud php occ encryption:enable-master-key
+
+# Enable apps
+docker-compose exec -u 33 nextcloud php occ app:enable context_chat
+docker-compose exec -u 33 nextcloud php occ app:enable app_api
+
+# Register Mock Backend via OCC
+echo "Cleaning up previous registrations..."
+docker-compose exec -u 33 nextcloud php occ app_api:app:unregister context_chat_backend --force --no-interaction || true
+docker-compose exec -u 33 nextcloud php occ app_api:daemon:unregister manual_install --no-interaction || true
+
+echo "Registering Mock Backend..."
+
+# Register daemon config
+# Using just hostname for daemon, allowing app port to be appended correctly
+docker-compose exec -u 33 nextcloud php occ app_api:daemon:register manual_install "Manual Install" manual-install http context_chat_backend http://localhost --no-interaction || true
+
+# Register the app
+# We use --force-scopes to avoid interactive prompts
+docker-compose exec -u 33 nextcloud php occ app_api:app:register context_chat_backend manual_install --json-info '{"id":"context_chat_backend","name":"Context Chat Backend","deploy_method":"manual_install","version":"1.0.0","secret":"secret","host":"context_chat_backend","port":23000,"scopes":[],"protocol":"http","system_app":0}' --force-scopes --no-interaction || true
+
+# Enable the app (it was listed as disabled)
+echo "Enabling Context Chat Backend..."
+docker-compose exec -u 33 nextcloud php occ app_api:app:enable context_chat_backend --no-interaction || true
+
+# Debug: List registered apps
+echo "Listing AppAPI apps..."
+docker-compose exec -u 33 nextcloud php occ app_api:app:list
+
+# Configure context_chat
+docker-compose exec -u 33 nextcloud php occ config:app:set context_chat backend_init --value true
+
+# Create test file
+echo "Creating test file via VFS (Encrypted)..."
+docker-compose cp create_test_file.php nextcloud:/var/www/html/create_test_file.php
+docker-compose exec -u 33 nextcloud php /var/www/html/create_test_file.php
+
+# Verify file existence via PHP
+echo "Verifying file existence in Nextcloud VFS..."
+if docker-compose exec -u 33 nextcloud php -r 'define("NC_CLI_MODE", true); require_once "/var/www/html/lib/base.php"; echo \OCP\Server::get(\OCP\Files\IRootFolder::class)->getUserFolder("admin")->nodeExists("test.txt") ? "YES" : "NO";' | grep -q "YES"; then
+    echo "SUCCESS: test.txt found in Nextcloud VFS."
+else
+    echo "FAILURE: test.txt NOT found in Nextcloud VFS."
+    exit 1
+fi
+
+# DEBUG: Check Sizes
+echo "DEBUG: Checking file sizes..."
+docker-compose cp debug_sizes.php nextcloud:/var/www/html/debug_sizes.php
+docker-compose exec -u 33 nextcloud php /var/www/html/debug_sizes.php
+
+# Run Indexer on the specific file
+echo "Running Scan (Direct Indexing) on test.txt..."
+docker-compose exec -u 33 nextcloud php occ context_chat:scan admin --directory test.txt
+
+# Check logs
+echo "Checking backend logs..."
+docker-compose logs --no-log-prefix context_chat_backend
+
+echo "Test completed successfully."