add

+/**************************************************************************
+* file:              dmpesribundlev2provider.cpp
+
+* Author:            wanzhongping
+* Date:              2021-06-02 11:29:16
+* Email:             zhongpingw@chinadci.com
+* copyright:         广州城市信息研究所有限公司
+***************************************************************************/
+#include "dmpesribundlev2provider.h"
+#include "dmpwmtsutils.h"
+
+namespace DmpWmts
+{
+    DmpEsriBundleV2Provider::DmpEsriBundleV2Provider()
+    {
+        _rootPath ="/mnt/d/Data/SDZT_DIANZDT_2016_FS2K/Layers/_alllayers";
+    }
+    void DmpEsriBundleV2Provider::WriteTile(const int row, const int col, const int level, const std::string& format, DmpServerResponse& response)
+    { 
+        int packSize = _packetSize;
+        int rGroup = (int)row/packSize;
+        rGroup = rGroup * packSize;
+        int cGroup = (int)col/packSize;
+        cGroup = cGroup*packSize;
+
+        std::string bundleBase = GetBundlePath(level,rGroup,cGroup);
+        std::string bundleFilePath = bundleBase + ".bundle";
+
+        int index = packSize * (row - rGroup) + (col - cGroup);
+
+        //读取bundle文件,计算偏移量
+        std::ifstream fread(bundleFilePath, std::ifstream::binary);
+        if(!fread)
+        {
+            response.SendError(500, "找不到瓦片:(");
+        }    
+        fread.seekg(64 + 8 * index, fread.beg);
+        char* buffer = new char[4];
+        fread.read(buffer,4);
+        long offset = (long)(buffer[0]&0xff) 
+                    + (long)(buffer[1]&0xff) * 256 
+                    + (long)(buffer[2]&0xff) * 65536
+                    + (long)(buffer[3]&0xff) * 16777216 
+                    -4;
+        delete [] buffer;
+        
+        //读取bundle文件获取切片  
+        fread.seekg(offset, fread.beg);
+        char* buff = new char[4];
+        fread.read(buff, 4);
+        long len = (long)(buff[0]&0xff) 
+                 + (long)(buff[1]&0xff) * 256 
+                 + (long)(buff[2]&0xff) * 65536
+                 + (long)(buff[3]&0xff) * 16777216;
+        delete[] buff;
+        char* imgBuffer = new char[len];
+        fread.read(imgBuffer, len);
+        fread.close();
+        if(len > 0)
+        {
+            response.RemoveHeader("Content-Type"); 
+            std::string f = (format == "jpg") ? "image/jpg" : "image/png";     
+            response.SetHeader("Content-Type", f);
+            response.WriteContent(imgBuffer, len);
+        }
+        else
+        {
+            response.SendError(500, "找不到瓦片:(");
+        }
+        delete[] imgBuffer;
+    }
+}
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