feat: 모바일 페이지 링크이미지 출력

mens-api/src/main/java/kr/xit/ens/ktgbs/web/KtGbsInboundController.java

@@ -1,9 +1,7 @@
 package kr.xit.ens.ktgbs.web;
 
 import org.springframework.http.MediaType;
-import org.springframework.web.bind.annotation.PostMapping;
-import org.springframework.web.bind.annotation.RequestBody;
-import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.bind.annotation.*;
 
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.media.Content;
@@ -14,6 +12,14 @@ import kr.xit.biz.ens.model.ktgbs.KtGbsDTO;
 import kr.xit.biz.ktgbs.service.IBizKtGbsService;
 import lombok.RequiredArgsConstructor;
 
+import javax.servlet.ServletOutputStream;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URL;
+
 /**
  * <pre>
  * description : KT GBIS 에서 사용 되는 API
@@ -78,4 +84,44 @@ public class KtGbsInboundController {
     public KtCommonDTO.KtCommonResponse messageResult(@RequestBody final KtGbsDTO.MsgRsltRequest reqDTO) {
         return bizService.messageResult(reqDTO);
     }
+
+    @Operation(summary = "링크이미지 출력")
+    @GetMapping(value = "/goji/sys/util/lnk/img")
+    public void printImg(HttpServletRequest request, HttpServletResponse response, @RequestParam String link, @RequestParam String type) throws IOException {
+
+        String mime = null;
+        if ("jpg".equals(type) || "jpeg".equals(type))
+            mime = "image/jpeg";
+        else if ("png".equals(type))
+            mime = "image/png";
+        else if ("gif".equals(type))
+            mime = "image/gif";
+        else
+            mime = "image/jpeg";
+
+
+        try (InputStream inputStream = new URL(link).openStream();
+             ServletOutputStream outputStream = response.getOutputStream();) {
+
+            response.setHeader("Cache-Control", "no-store");
+            response.setHeader("Pragma", "no-cache");
+            response.setDateHeader("Expires", 0);
+            response.setContentType(mime);
+
+
+            int length;
+            byte[] buffer = new byte[1024];
+            while ((length = inputStream.read(buffer)) != -1) {
+                outputStream.write(buffer, 0, length);
+            }
+
+
+            outputStream.flush();
+
+        } catch (FileNotFoundException e) {
+            response.getWriter().println("File is Not Found." + e.getMessage());
+        } catch (IOException e) {
+            response.getWriter().println("I/O Error Occurred!!. " + e.getMessage());
+        }
+    }
 }