新增

2026-08-11 17:39:41 +08:00
parent cfe4c82c90
commit 25467b9d91
350 changed files with 201115 additions and 132208 deletions
@@ -0,0 +1,136 @@
+<?php
+
+declare(strict_types=1);
+
+namespace app\common\service;
+
+/**
+ * Dify Chat App blocking 客户端。
+ *
+ * 只接受服务端配置中的模型 profile，避免把上游地址和密钥暴露给前端。
+ */
+class DifyChatService
+{
+    /**
+     * @param array<string,mixed> $inputs
+     * @return array{ok:bool,content?:string,message_id?:string,latency_ms?:int,error_code?:string,error?:string}
+     */
+    public static function chat(string $profile, array $inputs, string $query, string $user): array
+    {
+        $config = config('prescription_ai') ?: [];
+        if (empty($config['enable'])) {
+            return self::error('CONFIG_DISABLED', '处方 AI 解释未启用');
+        }
+
+        $modelConfig = $config['models'][$profile] ?? null;
+        if (!is_array($modelConfig)) {
+            return self::error('INVALID_PROFILE', '不支持的 AI 模型');
+        }
+
+        $baseUrl = trim((string) ($config['base_url'] ?? ''));
+        $apiKey = trim((string) ($modelConfig['api_key'] ?? ''));
+        if ($baseUrl === '' || $apiKey === '') {
+            return self::error('CONFIG_MISSING', '该模型尚未配置 Dify 地址或 App Key');
+        }
+        if (!function_exists('curl_init')) {
+            return self::error('CURL_UNAVAILABLE', '服务器尚未启用 cURL 扩展');
+        }
+
+        $payload = [
+            'inputs' => $inputs,
+            'query' => $query,
+            'response_mode' => 'blocking',
+            'user' => $user,
+        ];
+        $body = json_encode($payload, JSON_UNESCAPED_UNICODE | JSON_INVALID_UTF8_SUBSTITUTE);
+        if ($body === false) {
+            return self::error('REQUEST_BUILD_FAILED', '处方数据编码失败');
+        }
+
+        $timeout = max(10, min(120, (int) ($config['timeout'] ?? 90)));
+        $ch = curl_init();
+        if ($ch === false) {
+            return self::error('CURL_INIT_FAILED', '无法初始化 AI 请求');
+        }
+        curl_setopt_array($ch, [
+            CURLOPT_URL => self::buildEndpoint($baseUrl),
+            CURLOPT_POST => true,
+            CURLOPT_POSTFIELDS => $body,
+            CURLOPT_RETURNTRANSFER => true,
+            CURLOPT_CONNECTTIMEOUT => min(8, max(3, (int) ceil($timeout / 4))),
+            CURLOPT_TIMEOUT => $timeout,
+            CURLOPT_SSL_VERIFYPEER => true,
+            CURLOPT_SSL_VERIFYHOST => 2,
+            CURLOPT_HTTPHEADER => [
+                'Content-Type: application/json',
+                'Accept: application/json',
+                'Authorization: Bearer ' . $apiKey,
+            ],
+        ]);
+
+        $startedAt = microtime(true);
+        $responseBody = curl_exec($ch);
+        $errno = curl_errno($ch);
+        $httpCode = (int) curl_getinfo($ch, CURLINFO_HTTP_CODE);
+        curl_close($ch);
+        $latencyMs = (int) round((microtime(true) - $startedAt) * 1000);
+
+        if ($errno !== 0) {
+            if ($errno === CURLE_OPERATION_TIMEDOUT) {
+                return self::error('UPSTREAM_TIMEOUT', '模型响应超时，请稍后重试', $latencyMs);
+            }
+            return self::error('UPSTREAM_UNAVAILABLE', '暂时无法连接 AI 服务，请稍后重试', $latencyMs);
+        }
+
+        $decoded = json_decode((string) $responseBody, true);
+        if ($httpCode === 401 || $httpCode === 403) {
+            return self::error('CONFIG_INVALID', '模型 App Key 无效或无权限', $latencyMs);
+        }
+        if ($httpCode === 429 || $httpCode >= 500) {
+            return self::error('UPSTREAM_BUSY', '模型服务繁忙，请稍后重试', $latencyMs);
+        }
+        if ($httpCode >= 400) {
+            return self::error('UPSTREAM_REJECTED', '模型未能处理本次请求', $latencyMs);
+        }
+        if (!is_array($decoded)) {
+            return self::error('INVALID_RESPONSE', '模型返回格式异常，请重试', $latencyMs);
+        }
+
+        $answer = trim((string) ($decoded['answer'] ?? ''));
+        if ($answer === '') {
+            return self::error('EMPTY_RESPONSE', '模型未返回报告内容，请重试', $latencyMs);
+        }
+
+        return [
+            'ok' => true,
+            'content' => $answer,
+            'message_id' => (string) ($decoded['message_id'] ?? ''),
+            'latency_ms' => $latencyMs,
+        ];
+    }
+
+    private static function buildEndpoint(string $baseUrl): string
+    {
+        $baseUrl = rtrim($baseUrl, '/');
+        if (str_ends_with($baseUrl, '/chat-messages')) {
+            return $baseUrl;
+        }
+        if (str_ends_with($baseUrl, '/v1')) {
+            return $baseUrl . '/chat-messages';
+        }
+        return $baseUrl . '/v1/chat-messages';
+    }
+
+    /**
+     * @return array{ok:false,error_code:string,error:string,latency_ms:int}
+     */
+    private static function error(string $code, string $message, int $latencyMs = 0): array
+    {
+        return [
+            'ok' => false,
+            'error_code' => $code,
+            'error' => $message,
+            'latency_ms' => $latencyMs,
+        ];
+    }
+}