84 lines
2.7 KiB
PHP
84 lines
2.7 KiB
PHP
<?php
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declare(strict_types=1);
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namespace App\Services;
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use App\Models\Client;
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use Illuminate\Support\Facades\Http;
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use Illuminate\Support\Facades\Log;
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use Illuminate\Support\Facades\RateLimiter;
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class LlmService
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{
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private const REQUEST_TIMEOUT = 30; // 请求超时时间（秒）
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/**
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* 发送 LLM 请求
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*
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* @param Client $client 客户
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* @param string $prompt 提示词
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* @param array $options 可选参数
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* @return array{response: string, usage: array}
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* @throws \RuntimeException
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*/
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public function sendRequest(Client $client, string $prompt, array $options = []): array
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{
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// 检查请求频率限制
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$key = 'llm_request_' . $client->id;
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if (RateLimiter::tooManyAttempts($key, $client->rate_limit)) {
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$seconds = RateLimiter::availableIn($key);
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throw new \RuntimeException("请求过于频繁，请在 {$seconds} 秒后重试。");
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}
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try {
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$provider = $client->llmProvider;
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if ($provider->status !== 'active') {
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throw new \RuntimeException('LLM 提供商当前不可用。');
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}
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// 发送请求到 LLM 提供商
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$response = Http::timeout($client->timeout)
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->withToken($provider->api_token)
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->withHeaders([
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'Content-Type' => 'application/json',
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'Accept' => 'application/json',
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])
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->post($provider->api_url, array_merge([
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'prompt' => $prompt,
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], $options));
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if (!$response->successful()) {
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Log::error('LLM provider request failed', [
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'status' => $response->status(),
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'body' => $response->body(),
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'provider' => $provider->name,
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'client_id' => $client->id,
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]);
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throw new \RuntimeException('LLM 提供商服务异常，请稍后重试。');
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}
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// 记录成功的请求
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RateLimiter::hit($key, 60);
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$result = $response->json();
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return [
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'response' => $result['choices'][0]['text'] ?? $result['response'] ?? '',
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'usage' => $result['usage'] ?? [],
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];
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} catch (\Illuminate\Http\Client\ConnectionException $e) {
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Log::error('LLM provider connection timeout', [
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'error' => $e->getMessage(),
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'trace' => $e->getTraceAsString(),
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'provider' => $provider->name ?? null,
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'client_id' => $client->id,
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]);
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throw new \RuntimeException('LLM 提供商响应超时，请稍后重试。');
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}
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}
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}
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