Skip to content
GitLab
An error occurred while loading the file. Please try again.
Switch branch/tag
Find file BlameHistoryPermalink
web_server.cpp 9.80 KiB
Open in Web IDE
1 
#include "web_server.h"
2
3 
//TODO: Add link to repos
4
5 
namespace config {
6 
  // Values should be defined in config.h
7 
#ifdef HTTP_USER
8 
  const char *http_user = HTTP_USER;
9 
#else
10 
  const char *http_user = "";
11 
#endif
12 
#ifdef HTTP_PASSWORD
13 
  const char *http_password = HTTP_PASSWORD;
14 
#else
15 
  const char *http_password = "";
16 
#endif
17
18 
}
19
20 
namespace web_server {
21
22 
  const char *header_template;
23 
  const char *body_template;
24 
  const char *script_template;
25 
  void handleWebServerRoot();
26 
  void handleWebServerCSV();
27 
  void handlePageNotFound();
28 
  void handleDeleteCSV();
29
30 
#if defined(ESP8266)
31 
  ESP8266WebServer http(80); // Create a webserver object that listens for HTTP request on port 80
32 
#elif defined(ESP32)
33 
  WebServer http(80);
34 
#endif
35
36 
  void update() {
37 
    http.handleClient(); // Listen for HTTP requests from clients
38 
  }
39
40 
  void initialize() {
41 
    header_template =
42 
        PSTR("<!doctype html><html lang=en>"
43 
            "<head>\n"
44 
            "<title>%d ppm - CO2 SENSOR - %s - %s</title>\n"
45 
            "<meta charset='UTF-8'>"
46 
            // HfT Favicon
47 
            "<link rel='icon' type='image/png' sizes='16x16' href='data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABHNCSVQICAgIfAhkiAAAAHtJREFUOE9jvMnA+5+BAsBIFQMkl85h+P3kGcOb8jqwW+TPH2H4de0GA29UGNxtfx49YWCRk0HwHz5iuKegwwB2AS4DkA2F6VR6cAWsEQbgBqDY9vARw/ejJ+Au+LxsFcPz6BSwHpwGYPMCSS6gyAAKYhESiKMGjPgwAADopHVhn5ynEwAAAABJRU5ErkJggg=='/>"
48 
            // Responsive grid:
49 
            "<link rel='stylesheet' href='https://unpkg.com/purecss@2.0.3/build/pure-min.css'>\n"
50 
            "<link rel='stylesheet' href='https://unpkg.com/purecss@2.0.3/build/grids-responsive-min.css'>\n"
51 
            // JS Graphs:
52 
            "<script src='https://cdn.plot.ly/plotly-basic-1.58.2.min.js'></script>\n"
53 
            // Fullscreen
54 
            "<meta name='viewport' content='width=device-width, initial-scale=1'>\n"
55 
            // Refresh after every measurement.
56 
            // "<meta http-equiv='refresh' content='%d'>\n"
57 
            "</head>\n"
58 
            "<body>\n"
59
60 
            "<div class='pure-g'><div class='pure-u-1'><div class='pure-menu'><p class='pure-menu-heading'>HfT-Stuttgart CO<sub>2</sub> sensor</p></div></div>\n"
61 
            "<div class='pure-u-1'><ul class='pure-menu pure-menu-horizontal pure-menu-list'>\n"
62 
            "<li class='pure-menu-item'><a href='#graph' class='pure-menu-link'>Graph</a></li>\n"
63 
            "<li class='pure-menu-item'><a href='#table' class='pure-menu-link'>Info</a></li>\n"
64 
            "<li class='pure-menu-item'><a href='#log' class='pure-menu-link'>Log</a></li>\n"
65 
            "<li class='pure-menu-item'><a href='./%s' class='pure-menu-link'>Download CSV</a></li>\n"
66 
            "</ul></div></div>\n");
67
68 
    body_template =
69 
        PSTR("<div class='pure-g'>\n"
70 
            "<div class='pure-u-1' id='graph'></div>\n" // Graph placeholder
71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140
"</div>\n" "<div class='pure-g'>\n" //Sensor table "<table id='table' class='pure-table-striped pure-u-1 pure-u-md-1-2'>\n" "<tr><th>Sensor</th><th>%s</th></tr>\n" "<tr><td>CO<sub>2</sub> concentration</td><td>%5d ppm</td></tr>\n" "<tr><td>Temperature</td><td>%.1f&#8451;</td></tr>\n" "<tr><td>Humidity</td><td>%.1f%%</td></tr>\n" "<tr><td>Last measurement</td><td>%s</td></tr>\n" "<tr><td>Measurement timestep</td><td>%5d s</td></tr>\n" "<tr><td>Last CSV write</td><td>%s</td></tr>\n" "<tr><td>CSV timestep</td><td>%5d s</td></tr>\n" #ifdef MQTT "<tr><td>Last MQTT publish</td><td>%s</td></tr>\n" "<tr><td>MQTT publish timestep</td><td>%5d s</td></tr>\n" #endif "<tr><td>Temperature offset</td><td>%.1fK</td></tr>\n" "<tr><td>Local address</td><td><a href='http://%s.local/'>%s.local</a></td></tr>\n" "<tr><td>Local IP</td><td><a href='http://%s'>%s</a></td></tr>\n" "<tr><td>Free heap space</td><td>%6d bytes</td></tr>\n" "<tr><td>Available drive space</td><td>%d kB</td></tr>\n" "<tr><td>Max loop duration</td><td>%5d ms</td></tr>\n" "<tr><td>Board</td><td>%s</td></tr>\n" "<tr><td>Uptime</td><td>%4d h %02d min %02d s</td></tr>\n" "</table>\n" // CSV placeholder "<div id='log' class='pure-u-1 pure-u-md-1-2'></div>\n" "<form action='/delete_csv' method='POST' onsubmit=\"return confirm('Are you really sure you want to delete all data?') && (document.body.style.cursor = 'wait');\">" "<input type='submit' value='Delete CSV'/>" "</form>\n" "</div>\n"); script_template = PSTR("<script>\n" "document.body.style.cursor = 'default';\n" "fetch('./%s',{credentials:'include'})\n" // Get CSV, fill table and fill diagram ".then(response=>response.text())\n" ".then(csvText=>csvToTable(csvText))\n" ".then(htmlTable=>addLogTableToPage(htmlTable))\n" ".then(_=>Plotly.newPlot('graph',data,layout,{displaylogo:false}))\n" ".catch(e=>console.error(e));\n" "xs=[];\n" "data=[{x:xs,y:[],type:'scatter',name:'CO<sub>2</sub>',line:{color:'#2ca02c'}},\n" "{x:xs,y:[],type:'scatter',name:'Temperature',yaxis:'y2',line:{color:'#ff7f0e',dash:'dot'}},\n" "{x:xs,y:[],type:'scatter',name:'Humidity',yaxis:'y3',line:{color:'#1f77b4',dash:'dot'}}];\n" "layout={height:600,title:'%s',legend:{xanchor:'right',x:0.2,y:1.0},\n" "xaxis:{domain:[0.0,0.85]},yaxis:{ticksuffix:'ppm',range:[0,2000],dtick:200},\n" "yaxis2:{overlaying:'y',side:'right',ticksuffix:'°C',position:0.9,anchor:'free',range:[0,30],dtick:3},\n" "yaxis3:{overlaying:'y',side:'right',ticksuffix:'%%',position:0.95,anchor:'free',range:[0,100],dtick:10}\n" "};\n" "function csvToTable(csvText) {\n" "csvText=csvText.trim();\n" "lines=csvText.split('\\n');\n" "table=document.createElement('table');\n" "table.className='pure-table-striped';\n" "n=lines.length;\n" "lines.forEach((line,i)=>{\n" "fields=line.split(';');\n" "xs.push(fields[0]);\n" "data[0]['y'].push(fields[1]);\n" "data[1]['y'].push(fields[2]);\n" "data[2]['y'].push(fields[3]);\n" "if(i>4 && i<n-12){if(i==5){fields=['...','...','...','...']}else{return;}}\n" "row=document.createElement('tr');\n" "fields.forEach((field,index)=>{\n" "cell=document.createElement(i<2?'th':'td');\n" "cell.appendChild(document.createTextNode(field));\n" "row.appendChild(cell);});\n" "table.appendChild(row);});\n" "return table;}\n"
141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210
"function addLogTableToPage(table){document.getElementById('log').appendChild(table);}\n" "</script>\n" "</body>\n" "</html>"); // Web-server http.on("/", handleWebServerRoot); http.on("/" + csv_writer::filename, handleWebServerCSV); http.on("/delete_csv", HTTP_POST, handleDeleteCSV); http.onNotFound(handlePageNotFound); http.begin(); Serial.print(F("You can access this sensor via http://")); Serial.print(SENSOR_ID); Serial.print(F(".local (might be unstable) or http://")); Serial.println(WiFi.localIP()); } // Allow access if http_user or http_password are empty, or if provided credentials match bool shouldBeAllowed() { return strcmp(config::http_user, "") == 0 || strcmp(config::http_password, "") == 0 || http.authenticate(config::http_user, config::http_password); } void handleWebServerRoot() { if (!shouldBeAllowed()) { return http.requestAuthentication(DIGEST_AUTH); } unsigned long ss = seconds(); unsigned int hh = ss / 3600; ss -= hh * 3600; uint8_t mm = ss / 60; ss -= mm * 60; uint16_t available_fs_space = csv_writer::getAvailableSpace() / 1024; //NOTE: Splitting in multiple parts in order to use less RAM char content[2000]; // Update if needed // Header size : 1383 - Body size : 1246 - Script size : 1648 // Header snprintf_P(content, sizeof(content), header_template, sensor::co2, SENSOR_ID.c_str(), WiFi.localIP().toString().c_str(), csv_writer::filename.c_str()); http.setContentLength(CONTENT_LENGTH_UNKNOWN); http.send_P(200, PSTR("text/html"), content); // Body snprintf_P(content, sizeof(content), body_template, SENSOR_ID.c_str(), sensor::co2, sensor::temperature, sensor::humidity, sensor::timestamp.c_str(), config::measurement_timestep, csv_writer::last_successful_write.c_str(), config::csv_interval, #ifdef MQTT mqtt::last_successful_publish.c_str(), config::sending_interval, #endif config::temperature_offset, SENSOR_ID.c_str(), SENSOR_ID.c_str(), WiFi.localIP().toString().c_str(), WiFi.localIP().toString().c_str(), get_free_heap_size(), available_fs_space, max_loop_duration, BOARD, hh, mm, ss); http.sendContent(content); // Script snprintf_P(content, sizeof(content), script_template, csv_writer::filename.c_str(), SENSOR_ID.c_str()); http.sendContent(content); } void handleWebServerCSV() { if (!shouldBeAllowed()) { return http.requestAuthentication(DIGEST_AUTH); } if (FS_LIB.exists(csv_writer::filename)) {
211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235
fs::File csv_file = FS_LIB.open(csv_writer::filename, "r"); http.sendHeader("Content-Length", String(csv_file.size())); http.streamFile(csv_file, F("text/csv")); csv_file.close(); } else { http.send(204, F("text/html"), F("No data available.")); } } void handleDeleteCSV() { if (!shouldBeAllowed()) { return http.requestAuthentication(DIGEST_AUTH); } Serial.print("Removing CSV file..."); FS_LIB.remove(csv_writer::filename); Serial.println(" Done!"); http.sendHeader("Location", "/"); http.send(303); } void handlePageNotFound() { http.send(404, F("text/plain"), F("404: Not found")); } }

Dies ist die Gitlab-Instanz des Transferportals der Hochschule für Technik Stuttgart. Hier geht es zurück zum Portal