ZYT/zyt
2
0
Fork 0
Code Issues Actions Packages Projects Releases Wiki Activity

更新

Browse Source
This commit is contained in:
Your Name
2026-08-14 14:37:30 +08:00
parent 21790e35f4
commit 18c15d1262
117 changed files with 28157 additions and 8080 deletions
Download Patch File Download Diff File Expand all files Collapse all files
server/app/common/service/DifyChatService.php
+225 -31
View File
@@ -5,12 +5,20 @@ declare(strict_types=1);
namespace app\common\service;
/**
* Dify Chat App blocking 客户端。
* 处方/诊单 AI 上游客户端。
*
* 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。
* 兼容 Dify blocking chat-messages 与 OpenAI-compatible chat completions。
* 地址和凭据只从服务端 prescription_ai 配置读取，不进入响应、日志或请求正文。
*/
class DifyChatService
{
/** @var array<int,string> */
private const ALLOWED_PROFILES = ['qwen', 'openai'];
private const MIN_TIMEOUT = 1;
private const MAX_TIMEOUT = 300;
/**
* @param array<string,mixed> $inputs
* @return array{ok:bool,content?:string,message_id?:string,latency_ms?:int,error_code?:string,error?:string}
@@ -19,45 +27,197 @@ class DifyChatService
{
$config = config('prescription_ai') ?: [];
if (empty($config['enable'])) {
return self::error('CONFIG_DISABLED', '处方 AI 解释未启用');
return self::error('CONFIG_DISABLED', 'AI 报告功能未启用');
}
$modelConfig = $config['models'][$profile] ?? null;
if (!is_array($modelConfig)) {
$modelConfig = self::resolveProfileConfig($config, $profile);
if ($modelConfig === null) {
return self::error('INVALID_PROFILE', '不支持的 AI 模型');
}
$baseUrl = trim((string) ($config['base_url'] ?? ''));
$apiKey = trim((string) ($modelConfig['api_key'] ?? ''));
$rawApiKey = (string) ($modelConfig['api_key'] ?? '');
$apiKey = trim($rawApiKey);
if ($baseUrl === '' || $apiKey === '') {
return self::error('CONFIG_MISSING', '该模型尚未配置 Dify 地址或 App Key');
return self::error('CONFIG_MISSING', '该模型服务尚未完整配置');
}
if (!self::isValidBaseUrl($baseUrl) || strpbrk($rawApiKey, "\r\n") !== false) {
return self::error('CONFIG_INVALID', 'AI 服务配置无效');
}
$timeout = (int) ($config['timeout'] ?? 0);
if (!self::isValidTimeout($timeout)) {
return self::error('CONFIG_INVALID', 'AI 服务超时配置无效');
}
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,
$model = trim((string) ($modelConfig['name'] ?? ''));
if ($model === '') {
return self::error('CONFIG_INVALID', 'AI 模型配置无效');
}
$requestSpecs = self::buildRequestSpecs($baseUrl, $model, $inputs, $query, $user);
$startedAt = microtime(true);
$lastResponse = null;
foreach ($requestSpecs as $index => $requestSpec) {
$elapsedSeconds = (int) floor(microtime(true) - $startedAt);
$remainingTimeout = $timeout - $elapsedSeconds;
if ($remainingTimeout < self::MIN_TIMEOUT) {
return self::error(
'UPSTREAM_TIMEOUT',
'模型响应超时，请稍后重试',
self::elapsedMilliseconds($startedAt)
);
}
$response = self::sendRequest(
$requestSpec['url'],
$requestSpec['payload'],
$apiKey,
$remainingTimeout
);
$lastResponse = $response;
// /v1 在两种协议中都是合法基址。仅在明确表示路径不存在时尝试另一协议，
// 避免因业务参数错误而重复提交同一份临床数据。
$hasFallback = isset($requestSpecs[$index + 1]);
if ($hasFallback && in_array($response['http_code'], [404, 405], true)) {
continue;
}
return self::formatResponse($response, $startedAt);
}
return self::formatResponse($lastResponse ?? [
'body' => '',
'errno' => 0,
'http_code' => 0,
], $startedAt);
}
/**
* @param array<string,mixed> $config
* @return array<string,mixed>|null
*/
private static function resolveProfileConfig(array $config, string $profile): ?array
{
if (!in_array($profile, self::ALLOWED_PROFILES, true)) {
return null;
}
$modelConfig = $config['models'][$profile] ?? null;
return is_array($modelConfig) ? $modelConfig : null;
}
/**
* @param array<string,mixed> $inputs
* @return array<int,array{protocol:string,url:string,payload:array<string,mixed>}>
*/
private static function buildRequestSpecs(
string $baseUrl,
string $model,
array $inputs,
string $query,
string $user
): array {
$baseUrl = rtrim($baseUrl, '/');
$path = strtolower((string) (parse_url($baseUrl, PHP_URL_PATH) ?? ''));
$difySpec = [
'protocol' => 'dify',
'url' => self::buildEndpoint($baseUrl, 'chat-messages'),
'payload' => [
'inputs' => $inputs,
'query' => $query,
'response_mode' => 'blocking',
'user' => $user,
],
];
$openAiSpec = [
'protocol' => 'openai',
'url' => self::buildEndpoint($baseUrl, 'chat/completions'),
'payload' => [
'model' => $model,
'messages' => [
['role' => 'user', 'content' => $query],
],
],
];
if (str_ends_with($path, '/chat-messages')) {
return [$difySpec];
}
if (str_ends_with($path, '/chat/completions')) {
return [$openAiSpec];
}
// 保持既有 /v1 Dify 配置优先，同时让 OpenAI-compatible 服务在 404/405 后透明回退。
return [$difySpec, $openAiSpec];
}
private static function buildEndpoint(string $baseUrl, string $endpoint): string
{
$baseUrl = rtrim($baseUrl, '/');
$path = strtolower((string) (parse_url($baseUrl, PHP_URL_PATH) ?? ''));
if (str_ends_with($path, '/chat-messages') || str_ends_with($path, '/chat/completions')) {
return $baseUrl;
}
if (str_ends_with($path, '/v1')) {
return $baseUrl . '/' . $endpoint;
}
return $baseUrl . '/v1/' . $endpoint;
}
private static function isValidBaseUrl(string $baseUrl): bool
{
if (preg_match('/[\x00-\x20\x7f]/', $baseUrl)) {
return false;
}
$parts = parse_url($baseUrl);
if (!is_array($parts)) {
return false;
}
$scheme = strtolower((string) ($parts['scheme'] ?? ''));
return in_array($scheme, ['http', 'https'], true)
&& trim((string) ($parts['host'] ?? '')) !== ''
&& !isset($parts['user'])
&& !isset($parts['pass'])
&& !isset($parts['query'])
&& !isset($parts['fragment']);
}
private static function isValidTimeout(int $timeout): bool
{
return $timeout >= self::MIN_TIMEOUT && $timeout <= self::MAX_TIMEOUT;
}
/**
* @param array<string,mixed> $payload
* @return array{body:string,errno:int,http_code:int}
*/
private static function sendRequest(
string $url,
array $payload,
string $apiKey,
int $timeout
): array {
$body = json_encode($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');
return ['body' => '', 'errno' => -1, 'http_code' => 0];
}
$timeout = max(10, min(120, (int) ($config['timeout'] ?? 90)));
$ch = curl_init();
if ($ch === false) {
return self::error('CURL_INIT_FAILED', '无法初始化 AI 请求');
return ['body' => '', 'errno' => -2, 'http_code' => 0];
}
curl_setopt_array($ch, [
CURLOPT_URL => self::buildEndpoint($baseUrl),
CURLOPT_URL => $url,
CURLOPT_POST => true,
CURLOPT_POSTFIELDS => $body,
CURLOPT_RETURNTRANSFER => true,
CURLOPT_CONNECTTIMEOUT => min(8, max(3, (int) ceil($timeout / 4))),
CURLOPT_CONNECTTIMEOUT => min(8, max(1, (int) ceil($timeout / 4))),
CURLOPT_TIMEOUT => $timeout,
CURLOPT_SSL_VERIFYPEER => true,
CURLOPT_SSL_VERIFYHOST => 2,
@@ -68,35 +228,56 @@ class DifyChatService
],
]);
$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) - $startedAt) * 1000);
return [
'body' => is_string($responseBody) ? $responseBody : '',
'errno' => $errno,
'http_code' => $httpCode,
];
}
/**
* @param array{body:string,errno:int,http_code:int} $response
* @return array{ok:bool,content?:string,message_id?:string,latency_ms:int,error_code?:string,error?:string}
*/
private static function formatResponse(array $response, float $startedAt): array
{
$latencyMs = self::elapsedMilliseconds($startedAt);
$errno = $response['errno'];
$httpCode = $response['http_code'];
if ($errno !== 0) {
if ($errno === CURLE_OPERATION_TIMEDOUT) {
return self::error('UPSTREAM_TIMEOUT', '模型响应超时，请稍后重试', $latencyMs);
}
if ($errno === -1) {
return self::error('REQUEST_BUILD_FAILED', '病例数据编码失败', $latencyMs);
}
if ($errno === -2) {
return self::error('CURL_INIT_FAILED', '无法初始化 AI 请求', $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);
$decoded = json_decode($response['body'], true);
if ($httpCode === 401 || $httpCode === 403) {
return self::error('CONFIG_INVALID', '模型 App Key 无效或无权限', $latencyMs);
return self::error('CONFIG_INVALID', 'AI 服务凭据无效或无权限', $latencyMs);
}
if ($httpCode === 429 || $httpCode >= 500) {
return self::error('UPSTREAM_BUSY', '模型服务繁忙，请稍后重试', $latencyMs);
}
if ($httpCode >= 400) {
if ($httpCode >= 400 || $httpCode < 200) {
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'] ?? ''));
$answer = self::extractContent($decoded);
if ($answer === '') {
return self::error('EMPTY_RESPONSE', '模型未返回报告内容，请重试', $latencyMs);
}
@@ -104,21 +285,34 @@ class DifyChatService
return [
'ok' => true,
'content' => $answer,
'message_id' => (string) ($decoded['message_id'] ?? ''),
'message_id' => (string) ($decoded['message_id'] ?? $decoded['id'] ?? ''),
'latency_ms' => $latencyMs,
];
}
private static function buildEndpoint(string $baseUrl): string
/** @param array<string,mixed> $decoded */
private static function extractContent(array $decoded): string
{
$baseUrl = rtrim($baseUrl, '/');
if (str_ends_with($baseUrl, '/chat-messages')) {
return $baseUrl;
$content = $decoded['answer'] ?? $decoded['choices'][0]['message']['content'] ?? '';
if (is_string($content)) {
return trim($content);
}
if (str_ends_with($baseUrl, '/v1')) {
return $baseUrl . '/chat-messages';
if (!is_array($content)) {
return '';
}
return $baseUrl . '/v1/chat-messages';
$parts = [];
foreach ($content as $part) {
if (is_array($part) && ($part['type'] ?? '') === 'text' && is_string($part['text'] ?? null)) {
$parts[] = $part['text'];
}
}
return trim(implode('', $parts));
}
private static function elapsedMilliseconds(float $startedAt): int
{
return (int) round((microtime(true) - $startedAt) * 1000);
}
/**