net/tools/flip_server/loadtime_measurement.h

   1 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef NET_TOOLS_FLIP_SERVER_LOADTIME_MEASUREMENT_H__
   6 #define NET_TOOLS_FLIP_SERVER_LOADTIME_MEASUREMENT_H__
   7
   8 #include <errno.h>
   9 #include <fcntl.h>
  10 #include <stdio.h>
  11 #include <sys/types.h>
  12 #include <unistd.h>
  13
  14 #include <map>
  15 #include <string>
  16 #include <vector>
  17
  18 // Class to handle loadtime measure related urls, which all start with testing
  19 // The in memory server has a singleton object of this class. It includes a
  20 // html file containing javascript to go through a list of urls and upload the
  21 // loadtime. The users can modify urls.txt to define the urls they want to
  22 // measure and start with downloading the html file from browser.
  23 class LoadtimeMeasurement {
  24  public:
  25   LoadtimeMeasurement(const std::string& urls_file,
  26                       const std::string& pageload_html_file)
  27       : num_urls_(0), pageload_html_file_(pageload_html_file) {
  28     std::string urls_string;
  29     read_file_to_string(urls_file.c_str(), &urls_string);
  30     split_string(urls_string, '\n', &urls_);
  31     num_urls_ = urls_.size();
  32   }
  33
  34   // This is the entry function for all the loadtime measure related urls
  35   // It handles the request to html file, get_total_iteration to get number
  36   // of urls in the urls file, get each url, report the loadtime for
  37   // each url, and the test is completed.
  38   void ProcessRequest(const std::string& uri, std::string& output) {
  39     // remove "/testing/" from uri to get the action
  40     std::string action = uri.substr(9);
  41     if (pageload_html_file_.find(action) != std::string::npos) {
  42       read_file_to_string(pageload_html_file_.c_str(), &output);
  43       return;
  44     }
  45     if (action.find("get_total_iteration") == 0) {
  46       char buffer[16];
  47       snprintf(buffer, 16, "%d", num_urls_);
  48       output.append(buffer, strlen(buffer));
  49       return;
  50     }
  51     if (action.find("geturl") == 0) {
  52       size_t b = action.find_first_of('=');
  53       if (b != std::string::npos) {
  54         int num = atoi(action.substr(b + 1).c_str());
  55         if (num < num_urls_) {
  56           output.append(urls_[num]);
  57         }
  58       }
  59       return;
  60     }
  61     if (action.find("test_complete") == 0) {
  62       for (std::map<std::string, int>::const_iterator it = loadtimes_.begin();
  63            it != loadtimes_.end(); ++it) {
  64         LOG(INFO) << it->first << " " << it->second;
  65       }
  66       loadtimes_.clear();
  67       output.append("OK");
  68       return;
  69     }
  70     if (action.find("record_page_load") == 0) {
  71       std::vector<std::string> query;
  72       split_string(action, '?', &query);
  73       std::vector<std::string> params;
  74       split_string(query[1], '&', &params);
  75       std::vector<std::string> url;
  76       std::vector<std::string> loadtime;
  77       split_string(params[1], '=', &url);
  78       split_string(params[2], '=', &loadtime);
  79       loadtimes_[url[1]] = atoi(loadtime[1].c_str());
  80       output.append("OK");
  81       return;
  82     }
  83   }
  84
  85  private:
  86   void read_file_to_string(const char* filename, std::string* output) {
  87     output->clear();
  88     int fd = open(filename, 0, "r");
  89     if (fd == -1)
  90       return;
  91     char buffer[4096];
  92     ssize_t read_status = read(fd, buffer, sizeof(buffer));
  93     while (read_status > 0) {
  94       output->append(buffer, static_cast<size_t>(read_status));
  95       do {
  96         read_status = read(fd, buffer, sizeof(buffer));
  97       } while (read_status <= 0 && errno == EINTR);
  98     }
  99     close(fd);
 100   }
 101
 102   void split_string(std::string& str, char sepa,
 103                     std::vector<std::string>* sub_strs) {
 104     size_t b = 0;
 105     size_t e = str.find_first_of(sepa, b);
 106     while (e != std::string::npos && e > b) {
 107       sub_strs->push_back(str.substr(b, e - b));
 108       b = e + 1;
 109       e = str.find_first_of(sepa, b);
 110     }
 111     if (b < str.size()) {
 112       sub_strs->push_back(str.substr(b));
 113     }
 114   }
 115
 116   int num_urls_;
 117   std::vector<std::string> urls_;
 118   std::map<std::string, int> loadtimes_;
 119   const std::string pageload_html_file_;
 120 };
 121
 122 #endif  // NET_TOOLS_FLIP_SERVER_LOADTIME_MEASUREMENT_H__
 123