ICPC 西安区域赛 2025 办赛总结&备忘录

• 前期准备
  • 选手机
  • 服务器
    • PHP相关配置
    • 优化后的外榜反代
    • 打印
    • 滚榜
• 赛中问题
• 后续优化
  • 优化PHP Session储存
  • 优化宽带尖峰
  • 优化代码

{
    auto_https off
    debug
    cache {
        ttl 0s
    }
}

:80 {
    @staticfile path_regexp allowed_files \.(js|css|png|jpg|ttf|woff2|svg|ico)$
    handle @staticfile {
        cache {
            ttl 604800s
        }
        reverse_proxy http://10.12.13.20 {
            header_down Cache-Control "public, max-age=604800, must-revalidate"
        }
    }

    handle /* {
        cache {
            ttl 3s
            stale 5s
        }
        rewrite * /public?static=true
        reverse_proxy http://10.12.13.20
    }
}

#!/bin/bash

# ========== 配置部分 ==========
URL="http://10.12.13.20/public"     # 要监控的URL
TIMEOUT=5                           # 超时时间（秒）
INTERVAL=5                          # 每次检查间隔（秒）
SERVICE="php8.3-fpm"                # 要重启的服务名，可改成 php8.2-fpm 等
LOG_FILE="./fpm_monitor.log"
# ==============================

while true; do
    START_TIME=$(date +%s%3N)
    HTTP_CODE=$(curl -o /dev/null -s -w "%{http_code}" --max-time $((TIMEOUT)) "$URL")
    END_TIME=$(date +%s%3N)

    ELAPSED_MS=$((END_TIME - START_TIME))
    ELAPSED_SEC=$(echo "scale=3; $ELAPSED_MS / 1000" | bc)

    if (( $(echo "$ELAPSED_SEC > $TIMEOUT" | bc -l) )) || [ "$HTTP_CODE" -ne 200 ]; then
        fpm_status=$(curl -s --max-time 1 http://localhost:8080/fpm_status)
        echo $fpm_status >> "$LOG_FILE"
        echo -e "\n" >> "$LOG_FILE"
        echo "$(date '+%F %T') [WARN] $URL response time ${ELAPSED_SEC}s or code=$HTTP_CODE, restarting $SERVICE" >> "$LOG_FILE"
        systemctl restart "$SERVICE"
    else
        echo "$(date '+%F %T') [INFO] $URL response time ${ELAPSED_SEC}s or code=$HTTP_CODE" >> "$LOG_FILE"
    fi

    sleep "$INTERVAL"
done

[19-Oct-2025 06:22:30]  [pool domjudge] pid 494122
script_filename = /opt/domjudge/domserver/webapp/public/index.php
[0x000075337d813fc0] execute() /opt/domjudge/domserver/lib/vendor/symfony/http-foundation/Session/Storage/Handler/PdoSessionHandler.php:631
[0x000075337d813ee0] doRead() /opt/domjudge/domserver/lib/vendor/symfony/http-foundation/Session/Storage/Handler/AbstractSessionHandler.php:69
[0x000075337d813e40] read() /opt/domjudge/domserver/lib/vendor/symfony/http-foundation/Session/Storage/Handler/PdoSessionHandler.php:297
[0x000075337d813dc0] read() /opt/domjudge/domserver/lib/vendor/symfony/http-foundation/Session/Storage/Handler/AbstractSessionHandler.php:49
[0x000075337d813d40] validateId() /opt/domjudge/domserver/lib/vendor/symfony/http-foundation/Session/Storage/Proxy/SessionHandlerProxy.php:69
[0x000075337d813cc0] validateId() /opt/domjudge/domserver/lib/vendor/symfony/http-foundation/Session/Storage/NativeSessionStorage.php:172
[0x000075337d813c70] session_start() /opt/domjudge/domserver/lib/vendor/symfony/http-foundation/Session/Storage/NativeSessionStorage.php:172
[0x000075337d813bc0] start() /opt/domjudge/domserver/lib/vendor/symfony/http-foundation/Session/Storage/NativeSessionStorage.php:311
[0x000075337d813b40] getBag() /opt/domjudge/domserver/lib/vendor/symfony/http-foundation/Session/Session.php:222
[0x000075337d813ab0] getBag() /opt/domjudge/domserver/lib/vendor/symfony/http-foundation/Session/Session.php:242
[0x000075337d813a50] getAttributeBag() /opt/domjudge/domserver/lib/vendor/symfony/http-foundation/Session/Session.php:69
[0x000075337d8139d0] get() /opt/domjudge/domserver/lib/vendor/symfony/security-http/Firewall/ContextListener.php:98
[0x000075337d8138d0] authenticate() /opt/domjudge/domserver/lib/vendor/symfony/security-http/Firewall/AbstractListener.php:26
[0x000075337d813850] __invoke() /opt/domjudge/domserver/lib/vendor/symfony/security-http/Firewall.php:128
[0x000075337d8137b0] callListeners() /opt/domjudge/domserver/lib/vendor/symfony/security-http/Firewall.php:95
[0x000075337d8136c0] onKernelRequest() /opt/domjudge/domserver/lib/vendor/symfony/event-dispatcher/EventDispatcher.php:260
[0x000075337d8135f0] Symfony\Component\EventDispatcher\{closure}() /opt/domjudge/domserver/lib/vendor/symfony/event-dispatcher/EventDispatcher.php:220
[0x000075337d813530] callListeners() /opt/domjudge/domserver/lib/vendor/symfony/event-dispatcher/EventDispatcher.php:56
[0x000075337d813480] dispatch() /opt/domjudge/domserver/lib/vendor/symfony/http-kernel/HttpKernel.php:157
[0x000075337d8133a0] handleRaw() /opt/domjudge/domserver/lib/vendor/symfony/http-kernel/HttpKernel.php:76

# This file is the entry point to configure your own services.
# Files in the packages/ subdirectory configure your dependencies.

# Put parameters here that don't need to change on each machine where the app is deployed
# https://symfony.com/doc/current/best_practices.html#use-parameters-for-application-configuration
imports:
    - { resource: static.yaml }

parameters:
    locale: en
    # Enable this to support removing time intervals from the contest.
    # This code is rarely tested and we discourage using it.
    removed_intervals: false
    # Minimum password length for users
    min_password_length: 10

services:
    # default configuration for services in *this* file
    _defaults:
        autowire: true      # Automatically injects dependencies in your services.
        autoconfigure: true # Automatically registers your services as commands, event subscribers, etc.

    # makes classes in src/ available to be used as services
    # this creates a service per class whose id is the fully-qualified class name
    App\:
        resource: '../src/'
        exclude:
            - '../src/DependencyInjection'
            - '../src/Entity'
            - '../src/Migrations'
            - '../src/Kernel.php'
    
    # 添加下面的部分
    Redis:
        class: Redis
        calls:
            - connect: ['127.0.0.1', 6379]

    Symfony\Component\HttpFoundation\Session\Storage\Handler\RedisSessionHandler:
        arguments: ['@Redis']
        public: true

    session.handler.redis:
        alias: Symfony\Component\HttpFoundation\Session\Storage\Handler\RedisSessionHandler
        public: true

# see https://symfony.com/doc/current/reference/configuration/framework.html
framework:
    secret: '%env(APP_SECRET)%'
    esi: false
    fragments: false
    http_method_override: true
    annotations: false
    handle_all_throwables: true
    serializer:
        enabled: true
        name_converter: serializer.name_converter.camel_case_to_snake_case

    # Enables session support. Note that the session will ONLY be started if you read or write from it.
    # Remove or comment this section to explicitly disable session support.
    session:
        # 修改此处
        # handler_id: "%env(DATABASE_URL)%"
        handler_id: 'session.handler.redis'
        cookie_secure: auto
        cookie_samesite: lax
        storage_factory_id: session.storage.factory.native

    php_errors:
        log: true

    assets:
        version: "v=%domjudge.version%"

when@test:
    framework:
        test: true
        session:
            storage_factory_id: session.storage.factory.mock_file

    public function getConfigSpecification(): array
    {
        // We use Symfony resource caching so we can load the config on every
        // request without having a performance impact.
        // See https://symfony.com/doc/4.3/components/config/caching.html for
        // more information.
        $cacheFile = $this->cacheDir . '/djDbConfig.php';
        $this->configCache->cache($cacheFile,
            function (ConfigCacheInterface $cache) {
                // @codeCoverageIgnoreStart
                $yamlDbConfigFile = $this->etcDir . '/db-config.yaml';
                $fileLocator      = new FileLocator($this->etcDir);
                $loader           = new YamlConfigLoader($fileLocator);
                $yamlConfig       = $loader->load($yamlDbConfigFile);

                // We first modify the data such that it contains the category as a field,
                // since requesting data is faster in that case.
                $config = [];
                foreach ($yamlConfig as $category) {
                    foreach ($category['items'] as $item) {
                        $config[$item['name']] = $item + ['category' => $category['category']];
                    }
                }

                $code          = var_export($config, true);
                $specification = <<<EOF
<?php

return {$code};
EOF;

                $cache->write($specification,
                    [new FileResource($yamlDbConfigFile)]);
                // @codeCoverageIgnoreEnd
            });
        return array_map(
            fn(array $item) => ConfigurationSpecification::fromArray($item),
            require $cacheFile
        );
    }

    public function getConfigSpecification(): array
    {
        // We use Symfony resource caching so we can load the config on every
        // request without having a performance impact.
        // See https://symfony.com/doc/4.3/components/config/caching.html for
        // more information.
        $cacheFile = $this->cacheDir . '/djDbConfig.php';
        $this->configCache->cache($cacheFile,
            function (ConfigCacheInterface $cache) {
                // @codeCoverageIgnoreStart
                $yamlDbConfigFile = $this->etcDir . '/db-config.yaml';
                $fileLocator      = new FileLocator($this->etcDir);
                $loader           = new YamlConfigLoader($fileLocator);
                $yamlConfig       = $loader->load($yamlDbConfigFile);

                // We first modify the data such that it contains the category as a field,
                // since requesting data is faster in that case.
                $config = [];
                foreach ($yamlConfig as $category) {
                    foreach ($category['items'] as $item) {
//                        $config[$item['name']] = $item + ['category' => $category['category']];
                        $config[$item['name']] = ConfigurationSpecification::fromArray(
                                $item + ['category' => $category['category']]
                        );
                    }
                }

                $code          = var_export(serialize($config), true);
                $specification = <<<EOF
<?php

return unserialize({$code});
EOF;

                $cache->write($specification,
                    [new FileResource($yamlDbConfigFile)]);
                // @codeCoverageIgnoreEnd
            });

//        return array_map(
//            fn(array $item) => ConfigurationSpecification::fromArray($item),
//            require $cacheFile
//        );
        return require $cacheFile;
    }