package com.iailab.gateway.util;
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import cn.hutool.core.net.NetUtil;
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import cn.hutool.core.util.IdUtil;
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import cn.hutool.core.util.StrUtil;
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import org.springframework.cloud.client.ServiceInstance;
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import org.springframework.http.HttpHeaders;
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import java.util.Objects;
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/**
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* 环境 Utils
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*
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* copy from iailab-common-env 的 EnvUtils 类
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*
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* @author iailab
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*/
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public class EnvUtils {
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private static final String HEADER_TAG = "tag";
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public static final String HOST_NAME_VALUE = "${HOSTNAME}";
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public static String getTag(HttpHeaders headers) {
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String tag = headers.getFirst(HEADER_TAG);
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// 如果请求的是 "${HOSTNAME}",则解析成对应的本地主机名
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// 目的:特殊逻辑,解决 IDEA Rest Client 不支持环境变量的读取,所以就服务器来做
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return Objects.equals(tag, HOST_NAME_VALUE) ? getHostName() : tag;
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}
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public static String getTag(ServiceInstance instance) {
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return instance.getMetadata().get(HEADER_TAG);
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}
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public static String getHostName() {
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return StrUtil.blankToDefault(NetUtil.getLocalHostName(), IdUtil.fastSimpleUUID());
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}
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}
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