add

+/**************************************************************************
+* file:              dmpesritileprovider.cpp
+
+* Author:            wanzhongping
+* Date:              2021-05-28 14:24:01
+* Email:             zhongpingw@chinadci.com
+* copyright:         广州城市信息研究所有限公司
+***************************************************************************/
+#include "dmpesritileprovider.h"
+#include "dmpwmtsutils.h"
+#include <string>
+
+namespace DmpWmts
+{
+    DmpEsriTileProvider::DmpEsriTileProvider()
+    {
+        this->_rootPath ="/mnt/d/Data/tile/ShareMap2014/Layers/_alllayers/";
+    }
+
+    std::string DmpEsriTileProvider::IntToHex8Str(const int num)
+    {
+        char* buffer = new char[8];
+        sprintf(buffer,"%08x",num);
+        std::string str = std::string(buffer, 8);
+        delete[] buffer;
+        return str;
+    }
+    void DmpEsriTileProvider::WriteTile(const int row, const int col, const int level, const std::string& format, DmpServerResponse& response)
+    { 
+        std::string level_str = "L" + IntToFormatStr(level);
+        std::string row_str = "R" + IntToHex8Str(row);
+        std::string col_str = "C" + IntToHex8Str(col);
+        
+        std::string tile_path = _rootPath + level_str + "/"+ row_str+"/"+ col_str + "." + format;
+
+        std::ifstream fread(tile_path, std::ifstream::binary);
+        if(!fread)
+        {
+            response.SendError(500, "找不到瓦片:(");
+            return;
+        }
+        fread.seekg(0,fread.end);
+        int length = fread.tellg();
+        if(length > 0)
+        { 
+            fread.seekg(0,fread.beg);
+            char* buff = new char[length]; 
+            fread.read(buff,length);
+
+            std::string f = (format == "jpg") ? "image/jpg" : "image/png";     
+            response.SetHeader("Content-Type", f);
+            response.WriteContent(buff, length);
+
+            delete buff;
+        }
+        else
+        {
+            response.SendError(500, "找不到瓦片:(");
+        }
+        fread.close();
+    }
+}
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