Merge pull request #41 from moneroexamples/preload_template_files

Preload template files to improve performance

src/page.h

@@ -253,8 +253,6 @@ class page {
 
     string lmdb2_path;
 
-    string css_styles;
-
     bool testnet;
 
     bool enable_pusher;
@@ -270,6 +268,13 @@ class page {
     uint64_t no_of_mempool_tx_of_frontpage;
     uint64_t no_blocks_on_index;
 
+    // instead of constatnly reading template files
+    // from hard drive for each request, we can read
+    // them only once, when the explorer starts into this map
+    // this will improve performance of the explorer and reduce
+    // read operation in OS
+    map<string, string> template_file;
+
 
 public:
 
@@ -293,7 +298,7 @@ public:
               enable_autorefresh_option {_enable_autorefresh_option},
               no_blocks_on_index {_no_blocks_on_index}
     {
-        css_styles = xmreg::read(TMPL_CSS_STYLES);
+
         no_of_mempool_tx_of_frontpage = 25;
 
         // just moneky patching now, to check
@@ -324,6 +329,29 @@ public:
                  << endl;
         }
 
+
+        // read template files for all the pages
+        // into template_file map
+
+        template_file["css_styles"]      = xmreg::read(TMPL_CSS_STYLES);
+        template_file["header"]          = xmreg::read(TMPL_HEADER);
+        template_file["footer"]          = get_footer();
+        template_file["index2"]          = get_full_page(xmreg::read(TMPL_INDEX2));
+        template_file["mempool"]         = xmreg::read(TMPL_MEMPOOL);
+        template_file["mempool_full"]    = get_full_page(template_file["mempool"]);
+        template_file["block"]           = get_full_page(xmreg::read(TMPL_BLOCK));
+        template_file["tx"]              = get_full_page(xmreg::read(TMPL_TX));
+        template_file["my_outputs"]      = get_full_page(xmreg::read(TMPL_MY_OUTPUTS));
+        template_file["rawtx"]           = get_full_page(xmreg::read(TMPL_MY_RAWTX));
+        template_file["checkrawtx"]      = get_full_page(xmreg::read(TMPL_MY_CHECKRAWTX));
+        template_file["pushrawtx"]       = get_full_page(xmreg::read(TMPL_MY_PUSHRAWTX));
+        template_file["rawkeyimgs"]      = get_full_page(xmreg::read(TMPL_MY_RAWKEYIMGS));
+        template_file["rawoutputkeys"]   = get_full_page(xmreg::read(TMPL_MY_RAWOUTPUTKEYS));
+        template_file["checkrawkeyimgs"] = get_full_page(xmreg::read(TMPL_MY_CHECKRAWKEYIMGS));
+        template_file["checkoutputkeys"] = get_full_page(xmreg::read(TMPL_MY_CHECKRAWOUTPUTKEYS));
+        template_file["address"]         = get_full_page(xmreg::read(TMPL_ADDRESS));
+        template_file["search_results"]  = get_full_page(xmreg::read(TMPL_SEARCH_RESULTS));
+
     }
 
     /**
@@ -494,16 +522,10 @@ public:
         // append mempool_html to the index context map
         context["mempool_info"] = mempool_html;
 
-        // read index.html
-        string index2_html = xmreg::read(TMPL_INDEX2);
-
-        // add header and footer
-        string full_page = get_full_page(index2_html);
-
         add_css_style(context);
 
         // render the page
-        return mstch::render(full_page, context);
+        return mstch::render(template_file["index2"], context);
 
     }
 
@@ -640,8 +662,6 @@ public:
             return t1 > t2;
         });
 
-        // read mempool.html
-        string mempool_html = xmreg::read(TMPL_MEMPOOL);
 
         if (add_header_and_footer)
         {
@@ -650,11 +670,8 @@ public:
 
             context["partial_mempool_shown"] = false;
 
-            // add header and footer
-            string full_page = get_full_page(mempool_html);
-
             // render the page
-            return mstch::render(full_page, context);
+            return mstch::render(template_file["mempool_full"], context);
         }
 
         // this is for partial disply on front page.
@@ -672,7 +689,7 @@ public:
         context["partial_mempool_shown"] = true;
 
         // render the page
-        return mstch::render(mempool_html, context);
+        return mstch::render(template_file["mempool"], context);
     }
 
 
@@ -842,16 +859,10 @@ public:
         context["blk_reward"]
                 = xmreg::xmr_amount_to_str(txd_coinbase.xmr_outputs - sum_fees, "{:0.6f}");
 
-        // read block.html
-        string block_html = xmreg::read(TMPL_BLOCK);
-
         add_css_style(context);
 
-        // add header and footer
-        string full_page = get_full_page(block_html);
-
         // render the page
-        return mstch::render(full_page, context);
+        return mstch::render(template_file["block"], context);
     }
 
 
@@ -1643,20 +1654,10 @@ public:
         context["possible_spending"] = xmreg::xmr_amount_to_str(
                 possible_spending, "{:0.12f}", false);
 
-
-        //cout << "no_of_matched_mixins: " << no_of_matched_mixins << endl;
-
-
-        // read my_outputs.html
-        string my_outputs_html = xmreg::read(TMPL_MY_OUTPUTS);
-
-        // add header and footer
-        string full_page = get_full_page(my_outputs_html);
-
         add_css_style(context);
 
         // render the page
-        return mstch::render(full_page, context);
+        return mstch::render(template_file["my_outputs"], context);
     }
 
     string
@@ -1680,16 +1681,10 @@ public:
                 {"have_custom_lmdb"     , have_custom_lmdb}
         };
 
-        // read rawtx.html
-        string rawtx_html = xmreg::read(TMPL_MY_RAWTX);
-
-        // add header and footer
-        string full_page = get_full_page(rawtx_html);
-
         add_css_style(context);
 
         // render the page
-        return mstch::render(full_page, context);
+        return mstch::render(template_file["rawtx"], context);
     }
 
     string
@@ -2313,17 +2308,10 @@ public:
                 {"tx_details", xmreg::read(string(TMPL_PARIALS_DIR) + "/tx_details.html")},
         };
 
-
-        // read checkrawtx.html
-        string checkrawtx_html = xmreg::read(TMPL_MY_CHECKRAWTX);
-
-        // add header and footer
-        string full_page = get_full_page(checkrawtx_html);
-
         add_css_style(context);
 
         // render the page
-        return mstch::render(full_page, context, partials);
+        return mstch::render(template_file["checkrawtx"], context, partials);
     }
 
     string
@@ -2348,11 +2336,8 @@ public:
         };
         context.emplace("txs", mstch::array{});
 
-        // read pushrawtx.html
-        string pushrawtx_html = xmreg::read(TMPL_MY_PUSHRAWTX);
-
         // add header and footer
-        string full_page = get_full_page(pushrawtx_html);
+        string full_page = template_file["pushrawtx"];
 
         add_css_style(context);
 
@@ -2526,16 +2511,10 @@ public:
                 {"have_custom_lmdb"   , have_custom_lmdb}
         };
 
-        // read rawkeyimgs.html
-        string rawkeyimgs_html = xmreg::read(TMPL_MY_RAWKEYIMGS);
-
-        // add header and footer
-        string full_page = get_full_page(rawkeyimgs_html);
-
         add_css_style(context);
 
         // render the page
-        return mstch::render(full_page, context);
+        return mstch::render(template_file["rawkeyimgs"], context);
     }
 
     string
@@ -2547,16 +2526,10 @@ public:
                 {"have_custom_lmdb"   , have_custom_lmdb}
         };
 
-        // read rawoutputkeys.html
-        string rawoutputkeys_html = xmreg::read(TMPL_MY_RAWOUTPUTKEYS);
-
-        // add header and footer
-        string full_page = get_full_page(rawoutputkeys_html);
-
         add_css_style(context);
 
         // render the page
-        return mstch::render(full_page, context);
+        return mstch::render(template_file["rawoutputkeys"], context);
     }
 
     string
@@ -2579,11 +2552,8 @@ public:
                 {"error_msg"       , string{}},
         };
 
-        // read page template
-        string checkrawkeyimgs_html = xmreg::read(TMPL_MY_CHECKRAWKEYIMGS);
-
         // add header and footer
-        string full_page = get_full_page(checkrawkeyimgs_html);
+        string full_page = template_file["checkrawkeyimgs"];
 
         add_css_style(context);
 
@@ -2942,12 +2912,8 @@ public:
                 {"error_msg"       , string{}}
         };
 
-
-        // read page template
-        string checkoutputkeys_html = xmreg::read(TMPL_MY_CHECKRAWOUTPUTKEYS);
-
         // add header and footer
-        string full_page = get_full_page(checkoutputkeys_html);
+        string full_page = template_file["checkoutputkeys"];
 
         add_css_style(context);
 
@@ -3706,16 +3672,10 @@ public:
                 {"have_custom_lmdb"   , have_custom_lmdb}
         };
 
-        // read address.html
-        string address_html = xmreg::read(TMPL_ADDRESS);
-
-        // add header and footer
-        string full_page = get_full_page(address_html);
-
         add_css_style(context);
 
         // render the page
-        return mstch::render(full_page, context);
+        return mstch::render(template_file["address"], context);
     }
 
     // ;
@@ -3740,16 +3700,10 @@ public:
                 {"have_custom_lmdb"     , have_custom_lmdb}
         };
 
-        // read address.html
-        string address_html = xmreg::read(TMPL_ADDRESS);
-
         add_css_style(context);
 
-        // add header and footer
-        string full_page = get_full_page(address_html);
-
         // render the page
-        return mstch::render(full_page, context);
+        return mstch::render(template_file["address"], context);
     }
 
     map<string, vector<string>>
@@ -3951,11 +3905,8 @@ public:
             }
         }
 
-        // read search_results.html
-        string search_results_html = xmreg::read(TMPL_SEARCH_RESULTS);
-
         // add header and footer
-        string full_page = get_full_page(search_results_html);
+        string full_page = template_file["search_results"];
 
         // read partial for showing details of tx(s) found
         map<string, string> partials {
@@ -4695,11 +4646,11 @@ private:
 
 
     string
-    get_full_page(string& middle)
+    get_full_page(const string& middle)
     {
-        return xmreg::read(TMPL_HEADER)
+        return template_file["header"]
                + middle
-               + get_footer();
+               + template_file["footer"];
     }
 
     string
@@ -4722,7 +4673,7 @@ private:
     add_css_style(mstch::map& context)
     {
         context["css_styles"] = mstch::lambda{[&](const std::string& text) -> mstch::node {
-            return this->css_styles;
+            return template_file["css_styles"];
         }};
     }