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@ -1,18 +1,19 @@
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package com.dsideal.gw.Handler;
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import cn.hutool.json.JSONObject;
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import com.dsideal.gw.GwApplication;
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import com.jfinal.handler.Handler;
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import okhttp3.*;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import java.io.IOException;
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import java.util.HashMap;
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import java.util.Map;
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public class RouterHandler extends Handler {
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/**
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* 功能：输出JSON文本串
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*
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* @param res
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* @param jo
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*/
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@ -33,29 +34,65 @@ public class RouterHandler extends Handler {
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renderJson(res, new JSONObject().put("msg", msg));
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}
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//OkHttp的实例，单例模式
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private static final OkHttpClient OK_HTTP_CLIENT = new OkHttpClient();
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//OkHttp的回调函数，同步执行
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private void executeRequest(Request request, HttpServletResponse res) throws IOException {
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Response response = OK_HTTP_CLIENT.newCall(request).execute();
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if (response.isSuccessful()) {
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String responseBody = response.body().string();
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renderJson(res, responseBody);
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} else {
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renderJson(res, "请求失败！");
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}
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}
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@Override
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public void handle(String target, HttpServletRequest req, HttpServletResponse res, boolean[] isHandled) {
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//可以正确获取到URL的完整路径
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String servletPath = req.getServletPath();
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String queryString = req.getQueryString();
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//路由到哪个微服务
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int firstSlashIndex = servletPath.indexOf('/'); // 找到第一个 '/' 的索引
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int secondSlashIndex = servletPath.indexOf('/', firstSlashIndex + 1); // 从第一个 '/' 之后开始找第二个 '/' 的索引
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JSONObject jo = new JSONObject();
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Map<String, Object> _map = new HashMap<>();
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_map.put("servletPath", servletPath);
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_map.put("success", true);
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jo.putAll(_map);
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if (req.getMethod().equals("GET")) {
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renderJson(res, "现在调用是GET！");
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} else if (req.getMethod().equals("POST")) {
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renderJson(res, "现在调用是POST！");
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} else if (req.getContentType() != null && req.getContentType().contains("multipart/form-data")) {
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renderJson(res, "现在调用是上传操作！");
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if (firstSlashIndex != -1 && secondSlashIndex != -1) {
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String prefix = servletPath.substring(firstSlashIndex + 1, secondSlashIndex); // 截取两个 '/' 之间的内容
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if (!GwApplication.routeDict.containsKey(prefix)) {
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renderJson(res, prefix + "前缀没有找到合适的路由表，请检查是否请求正确！");
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} else {
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//路由到哪个微服务
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String FORWARD_URL = GwApplication.routeDict.get(prefix);
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//处理GET请求
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if (req.getMethod().equals("GET")) {
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//参数:queryString
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Request request;
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if (queryString != null) {
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request = new Request.Builder().url(FORWARD_URL + "?" + queryString).get().build();
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} else {
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request = new Request.Builder().url(FORWARD_URL).get().build();
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}
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try {
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executeRequest(request, res);
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} catch (IOException e) {
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renderJson(res, "请求失败！"+ e);
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}
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}//处理POST请求
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else if (req.getMethod().equals("POST")) {
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// RequestBody body = RequestBody.create(jsonBody, MediaType.parse("application/json; charset=utf-8"));
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// Request request = new Request.Builder().url(FORWARD_URL).post(body).build();
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} else {
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// MinIO - 服务端签名直传（前端 + 后端 + 效果演示）
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//https://blog.csdn.net/CYK_byte/article/details/140254412
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renderJson(res, "系统只支持GET,POST，其它的OPTIONS不支持！文件上传请使用S3协议进行直传，不通过JAVA处理，JAVA只处理授权！");
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}
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}
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} else {
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renderJson(res, "系统只支持GET,POST和文件上传，其它的OPTIONS不允许！");
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renderJson(res, "输入的字符串格式不正确，没有找到两个 '/'。");
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}
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//输出结果
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renderJson(res, jo);
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//停止filter
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isHandled[0] = true;
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}
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