舒孝元博客

[TOC]

## Nginx 配置

```
server {
    listen        80;
    server_name  php-demo-local.com;
    root   /www/php_demo/public;

add_header X-Frame-Options "SAMEORIGIN";
    add_header X-Content-Type-Options "nosniff";

index index.php;

charset utf-8;

access_log  /var/log/nginx/php.demo.local.com.access.log;
    error_log   /var/log/nginx/php.demo.local.com.error.log;

location / {
        try_files $uri $uri/ /index.php?$query_string;
    }

# 针对 SSE 请求的配置
    location /api/chatai/doubao-chat {
        # 禁用响应缓冲
        proxy_buffering off;
        proxy_cache off;
        proxy_set_header Connection '';
        proxy_http_version 1.1;
        chunked_transfer_encoding off;

# 增加超时时间，避免长时间连接被断开
        proxy_read_timeout 86400;
        client_max_body_size 100M;

fastcgi_buffering off;  # 如果使用FastCGI
    }

# 你会经常在日志中看到找不到 favicon.ico.php找不到的500报错
    location = /favicon.ico { access_log off; log_not_found off; }
    location = /robots.txt  { access_log off; log_not_found off; }

error_page 404 /index.php;

location ~ \.php$ {
        root           /www/php_demo;
        fastcgi_pass   php81:9000;
        fastcgi_index  index.php;
        fastcgi_param  SCRIPT_FILENAME /www/php_demo/public$fastcgi_script_name;
        include        fastcgi_params;
    }

location ~ /\.(?!well-known).* {
        deny all;
    }
}
```

## Laravel 代码设置

```
public function douBaoChat(Request $request)
{
    set_time_limit(0);
    ini_set('memory_limit', '-1M');

// 验证请求
    $request->validate([
        'message' => 'required|string|max:2000',
    ]);

// 获取用户消息
    $userMessage = $request->input('message');

try {
        $params = [
            'model'    => 'doubao-seed-1-6-250615',
            'messages' => [
                [
                    'role'    => 'system',
                    'content' => '你是一个AI对话助手，帮助用户解决问题。请保持专业和友好。',
                ],
                [
                    'role'    => 'user',
                    'content' => $userMessage,
                ],
            ],

"stream"      => true, //响应内容是否流式返回
            'temperature' => 0.2,
            // 'max_tokens'  => 1000, // 默认 4096 会受到模型上下文影响
        ];

$response = new StreamedResponse(function () use ($params) {
            $response = Http::withHeaders([
                'Authorization' => 'Bearer ' . config('chatai.doubao.api_key'),
                'Content-Type'  => 'application/json',
                'Accept'        => 'text/event-stream',
            ])->withOptions([
                'stream' => true,
            ])->post('https://ark.cn-beijing.volces.com/api/v3/chat/completions', $params);

$stream = $response->getBody()->detach();

while (!feof($stream)) {
                $chunk = fgets($stream);
                if ($chunk) {
                    echo "data: " . $chunk . "\n\n";
                    if (ob_get_level() > 0) {
                        ob_flush();
                    }
                    flush();
                }
            }

fclose($stream);
        });

$response->headers->set('Content-Type', 'text/event-stream');
        $response->headers->set('Cache-Control', 'no-cache');
        $response->headers->set('X-Accel-Buffering', 'no');
        $response->headers->set('Connection', 'keep-alive');

return $response;

} catch (\Exception $e) {
        // 记录异常信息
        Log::error('处理AI请求时发生异常', [
            'error' => $e->getMessage(),
            'trace' => $e->getTraceAsString(),
        ]);

return response()->json([
            'success'  => false,
            'response' => '抱歉，发生了内部错误，请稍后再试。',
        ], 500);
    }
}
```

## 前端配置

Nginx配合laravel框架实现SSE流式输出