118 lines
3.8 KiB
PHP
118 lines
3.8 KiB
PHP
<?php
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namespace App\Controllers;
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use App\Models\Config;
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use App\Services\AIService;
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class ChatController
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{
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public static function completions(): void
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{
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$input = json_decode(file_get_contents('php://input'), true);
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$provider = $input['provider'] ?? '';
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$model = $input['model'] ?? '';
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$messages = $input['messages'] ?? [];
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$stream = $input['stream'] ?? true;
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$systemPrompt = $input['systemPrompt'] ?? '';
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$thinkingMode = $input['thinkingMode'] ?? false;
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if (!$provider || !$model || !$messages) {
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http_response_code(400);
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echo json_encode(['success' => false, 'message' => '缺少必要参数（provider、model、messages）']);
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return;
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}
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if (!is_array($messages) || empty($messages)) {
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http_response_code(400);
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echo json_encode(['success' => false, 'message' => 'messages 必须是非空数组']);
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return;
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}
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// 获取供应商配置
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$configRow = Config::getByKey('providers');
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if (!$configRow) {
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http_response_code(500);
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echo json_encode(['success' => false, 'message' => '未找到供应商配置']);
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return;
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}
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$providers = json_decode($configRow['config_value'], true);
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if (!is_array($providers)) {
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http_response_code(500);
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echo json_encode(['success' => false, 'message' => '供应商配置格式错误']);
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return;
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}
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$providerKey = $provider;
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if (!isset($providers[$providerKey])) {
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http_response_code(400);
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echo json_encode(['success' => false, 'message' => '供应商不存在: ' . $providerKey]);
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return;
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}
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$providerConfig = $providers[$providerKey];
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if (empty($providerConfig['enabled'])) {
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http_response_code(400);
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echo json_encode(['success' => false, 'message' => '供应商已禁用: ' . $providerKey]);
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return;
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}
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$models = $providerConfig['models'] ?? [];
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if (!empty($models) && !in_array($model, $models)) {
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http_response_code(400);
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echo json_encode(['success' => false, 'message' => '模型不在供应商支持列表中: ' . $model]);
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return;
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}
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// 非流式模式暂不支持
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if (!$stream) {
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http_response_code(400);
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echo json_encode(['success' => false, 'message' => '当前仅支持流式响应']);
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return;
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}
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// 设置 SSE 响应头
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header('Content-Type: text/event-stream');
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header('Cache-Control: no-cache');
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header('Connection: keep-alive');
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header('X-Accel-Buffering: no');
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// 关闭输出缓冲
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while (ob_get_level()) {
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ob_end_flush();
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}
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$options = [
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'provider' => $providerConfig,
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'systemPrompt' => $systemPrompt,
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'thinkingMode' => (bool) $thinkingMode
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];
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try {
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AIService::streamChat($providerKey, $model, $messages, $options, function ($chunk, $type = 'content') {
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if ($type === 'thinking') {
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self::sendSSE(['thinking' => $chunk]);
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} else {
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self::sendSSE(['content' => $chunk]);
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}
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});
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self::sendSSE('[DONE]');
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} catch (\Throwable $e) {
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self::sendSSE(['type' => 'error', 'message' => $e->getMessage()]);
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}
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}
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private static function sendSSE($data): void
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{
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if (is_string($data)) {
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echo "data: " . $data . "\n\n";
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} else {
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echo "data: " . json_encode($data, JSON_UNESCAPED_UNICODE) . "\n\n";
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}
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flush();
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}
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}
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