谷粒商城Nginx轉網關(二十一)

 136、商城業務-首頁-整合thymeleaf渲染首頁 - 140、商城業務-nginx-搭建域名訪問環境二（負載均衡到網關)

 坑主要出現在我服務器的虛擬機訪問不到我的本地訪問，所以nginx暫時不能在上面，自己在本地測試的話，就先安裝在本地虛擬機上，到后面帶上都部署到k8s上，在切換到服務器虛擬機上。

渲染代碼：

    @GetMapping({"/", "index.html"})
    public String indexPage(Model model) {
        List<CategoryEntity> categoryEntities = categoryservice.getLevel1Categorys();
        model.addAttribute("categorys", categoryEntities);
        return "index";
    }

    @ResponseBody
    @GetMapping("/index/catalog.json")
    public Map<String, List<Catalog2Vo>> getCatalogJson() {
        Map<String, List<Catalog2Vo>> map = categoryservice.getCatalogJson();

        return map;
    }

 /**
     * 查詢所有一級分類
     *
     * @return
     */
    @Override
    public List<CategoryEntity> getLevel1Categorys() {
        List<CategoryEntity> categoryEntities = baseMapper.selectList(new QueryWrapper<CategoryEntity>().eq("parent_cid", 0));
        return categoryEntities;
    }

    @Override
    public Map<String, List<Catalog2Vo>> getCatalogJson() {
        //查詢出所有分類
        List<CategoryEntity> selectList = baseMapper.selectList(null);
        //先查出所有一級分類
        List<CategoryEntity> level1Categorys = getCategorys(selectList, 0L);
        //封裝數據 map k,v 結構
        Map<String, List<Catalog2Vo>> map = level1Categorys.stream().collect(Collectors.toMap(k -> k.getCatId().toString(), v -> {
            //每一個的一級分類，查到這個一級分類的二級分類
            List<CategoryEntity> category2Entities = getCategorys(selectList, v.getCatId());
            List<Catalog2Vo> catelog2Vos = null;

            if (category2Entities != null) {
                catelog2Vos = category2Entities.stream().map(level2 -> {
                    //封裝catalog2Vo
                    Catalog2Vo catalog2Vo = new Catalog2Vo(v.getCatId().toString(), null, level2.getCatId().toString(), level2.getName());
                    //每一個二級分類，查到三級分類
                    List<CategoryEntity> category3Entities = getCategorys(selectList, level2.getCatId());
                    if (category3Entities != null) {
                        List<Object> catalog3List = category3Entities.stream().map(level3 -> {
                            //封裝catalog3Vo
                            Catalog2Vo.Catalog3Vo catalog3Vo = new Catalog2Vo.Catalog3Vo(level2.getCatId().toString(), level3.getCatId().toString(), level3.getName());
                            return catalog3Vo;
                        }).collect(Collectors.toList());
                        //封裝catalog3Vo到catalog2Vo
                        catalog2Vo.setCatalog3List(catalog3List);
                    }
                    return catalog2Vo;
                }).collect(Collectors.toList());
            }
            //返回v=catalog2Vo
            return catelog2Vos;
        }));
        return map;
    }

    /**
     * 根據傳進分類篩選出對應級別
     *
     * @param list
     * @param parent_cid
     * @return
     */
    public List<CategoryEntity> getCategorys(List<CategoryEntity> list, Long parent_cid) {
        List<CategoryEntity> collect = list.stream().filter(l -> parent_cid.equals(l.getParentCid())).collect(Collectors.toList());
        return collect;
    }

          <ul>
            <li th:each="category:${categorys}">
              <a href="#" class="header_main_left_a" th:attr="ctg-data=${category.catId}"><b th:text="${category.name}">家用電器</b></a>
            </li>
          </ul>

nginx 

[root@192 conf.d]# cat gulimall.conf
server {
    listen       80;
    server_name  gulimall.com;

    #charset koi8-r;
    #access_log  /var/log/nginx/log/host.access.log  main;

    location / {
          proxy_set_header Host $host;
           proxy_pass   http://gulimall;
    }

    #error_page  404              /404.html;

    # redirect server error pages to the static page /50x.html
    #
    error_page   500 502 503 504  /50x.html;
    location = /50x.html {
        root   /usr/share/nginx/html;
    }

    # proxy the PHP scripts to Apache listening on 127.0.0.1:80
    #
    #location ~ \.php$ {
    #    proxy_pass   http://127.0.0.1;
    #}

    # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
    #
    #location ~ \.php$ {
    #    root           html;
    #    fastcgi_pass   127.0.0.1:9000;
    #    fastcgi_index  index.php;
    #    fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;
    #    include        fastcgi_params;
    #}

    # deny access to .htaccess files, if Apache's document root
    # concurs with nginx's one
    #
    #location ~ /\.ht {
    #    deny  all;
    #}
}

[root@192 conf.d]#

 注：收獲最多的就是  proxy_set_header Host $host;如果只配置網關的話，后面加api能路由到商品訪問，但是訪問不到gulimall。

 修改網關：

      - id: gulimall_host
        uri: lb://gulimall-product
        predicates:
          - Host=**.gulimall.com,gulimall.com

要把這個放到最后面，如果放到前面當請求接口的時候，會優先匹配到這個路由，而真正的訪問商品訪問是要去掉api的。

測試如下：