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authorRoland Reichwein <mail@reichwein.it>2020-12-20 16:52:47 +0100
committerRoland Reichwein <mail@reichwein.it>2020-12-20 16:52:47 +0100
commit73f0b597dec0705db01ed4eec7abaebc0295a243 (patch)
tree3599be15154a9eeaa09cb86e1918a13ac3a73bef /plugins/statistics/statistics.cpp
parentef63da27938ae091a341893c38e59d489888625a (diff)
webserver 1.12: Added graphical statistics page (gnuplot generated)
Diffstat (limited to 'plugins/statistics/statistics.cpp')
-rw-r--r--plugins/statistics/statistics.cpp48
1 files changed, 47 insertions, 1 deletions
diff --git a/plugins/statistics/statistics.cpp b/plugins/statistics/statistics.cpp
index b1778f7..415369d 100644
--- a/plugins/statistics/statistics.cpp
+++ b/plugins/statistics/statistics.cpp
@@ -1,5 +1,8 @@
#include "statistics.h"
+#include "libcommon/file.h"
+#include "libcommon/tempfile.h"
+
#include <boost/algorithm/string/predicate.hpp>
#include <boost/algorithm/string/split.hpp>
#include <boost/coroutine2/coroutine.hpp>
@@ -23,9 +26,48 @@ namespace {
{
SetResponseHeader("status", status);
SetResponseHeader("content_type", "text/html");
+
return status + " " + message;
}
+ std::string statsPng(std::function<std::string(const std::string& key)>& GetServerParam,
+ std::function<plugin_interface_setter_type>& SetResponseHeader)
+ {
+ // Create PNG statistics via Gnuplot
+ std::string statistics{GetServerParam("statistics")};
+
+ Tempfile tempStats{".txt"}; // input data
+ File::setFile(tempStats.GetPath(), statistics);
+
+ Tempfile tempPng{".png"}; // output
+
+ Tempfile tempGnuplot{".gnuplot"};
+ std::stringstream s;
+ s << "set terminal png truecolor\n";
+ s << "set output " << tempPng.GetPath() << "\n"; // quotes added automatically for paths
+ s << "set title \"Webserver Throughput\"\n";
+ s << "set xlabel \"Time\"\n";
+ s << "set timefmt \"%s\"\n";
+ s << "set format x \"%Y-%m-%d\"\n";
+ s << "set xdata time\n";
+ s << "set xtics rotate by 45 right\n";
+ s << "set ylabel \"Bytes\"\n";
+ s << "set datafile separator \",\"\n";
+ s << "set grid\n";
+ s << "set style fill solid\n";
+ s << "plot " << tempStats.GetPath() << " using 1:($4+$5) with boxes title \"Bytes I/O\" lt rgb \"#1132A7\"\n";
+ File::setFile(tempGnuplot.GetPath(), s.str());
+
+ int exit_code{system(("gnuplot "s + tempGnuplot.GetPath().generic_string()).c_str())};
+ if (exit_code) {
+ std::cerr << "Error: gnuplot returned " << std::to_string(exit_code) << std::endl;
+ return HttpStatus("500", "Statistics error"s, SetResponseHeader);
+ }
+
+ SetResponseHeader("content_type", "image/png");
+ return File::getFile(tempPng.GetPath());
+ }
+
// returns sum over specified column
uint64_t getSum(const std::string& stats, size_t column)
{
@@ -95,9 +137,12 @@ std::string statistics_plugin::generate_page(
if (target.size() && target.back() != '/' && fs::is_directory(path)) {
std::string location{GetRequestParam("location") + "/"s};
SetResponseHeader("location", location);
- return HttpStatus("301", "Correcting directory path", SetResponseHeader);
+ return HttpStatus("301", "Correcting directory path", SetResponseHeader); // 301 Moved Permanently
}
+ if (path.filename() == "stats.png")
+ return statsPng(GetServerParam, SetResponseHeader);
+
try {
SetResponseHeader("content_type", "text/html");
@@ -122,6 +167,7 @@ std::string statistics_plugin::generate_page(
result += "<p>IPv6 fraction by bytes: "s + std::to_string(ipv6_fraction_by_bytes * 100) + "%</p>";
result += "<p>HTTPS fraction by requests: "s + std::to_string(https_fraction_by_requests * 100) + "%</p>";
result += "<p>HTTPS fraction by bytes: "s + std::to_string(https_fraction_by_bytes * 100) + "%</p>";
+ result += "<p><img src=\"stats.png\"/></p>";
result += "<pre>"s + statistics + "</pre>"s;
result += footer;