Ilya I
Example of HTTPServer with additional features: * SNTPClient, DST rules * Link status indication * Local or SDCard-based WebServer * RPC-able class * Static and Dynamic HTML page
Embed:
(wiki syntax)
Show/hide line numbers
main.cpp
00001 // Written by IVA2K 00002 // 00003 // Example of HTTPServer with additional features: 00004 // * SNTP Client (Simple NTP) 00005 // * Link status indication (LED4 or RJ45 socket LED on MBED-BoB2-mod) 00006 // * Local file system (create index.htm page on MBED!) 00007 // * SD-based WebServer 00008 // * RPC-able class (myrpc, allows remote function call that blinks LED1 N times) 00009 // * Static HTML page 00010 // * Dynamic HTML page 00011 // 00012 // Instructions: 00013 // 1 Plug MBED into MBED-BoB2 (or other ETH connector breakout) 00014 // 2 Plug ETH connector into your network (needs DHCP to get IP address and Internet connection) 00015 // 3 Power up MBED using USB cable 00016 // 4 Install MBED serial driver (http://mbed.org/handbook/SerialPC) 00017 // 5 Copy compiled .bin to your MBED (make sure target device selected in the compiler is correct) 00018 // 6 Open terminal on the mbed serial port 00019 // 7 Push MBED reset button 00020 // 8 Terminal will display info message with mac address, followed by IP address (if connection succeeds) 00021 // in the following items, replace 10.0.0.321 with actual MBED IP address from the terminal 00022 // 9 Open browser and enter the following URL: 00023 // http://10.0.0.321/rpc/myrpc1/blink,10 00024 // 10 MBED will blink the LED 10 times 00025 // 11 Open browser and enter the following URL: 00026 // http://10.0.0.321/rpc/myrpc1/gettime 00027 // 12 The browser will show date and time from the MBED synchronized to NTP server 00028 // 13 Open browser and enter the following URL: 00029 // http://10.0.0.321/static.htm 00030 // 14 The browser will show static HTML page 00031 // 15 Open browser and enter the following URL: 00032 // http://10.0.0.321/dynamic.htm 00033 // 16 The browser will show dynamic HTML page 00034 // 17 Create a simple index.htm page on the MBED 00035 // 18 Open browser and enter the following URL: 00036 // http://10.0.0.321 00037 // 19 The browser will show index HTML page 00038 // 20 Create a simple index.htm page on a micro SD card, plug the card into MBED-BoB2 00039 // 21 Open browser and enter the following URL: 00040 // http://10.0.0.321 00041 // 22 The browser will show index HTML page from SD card 00042 // 23 Optionally, create file "sntp.ini" on MBED or SD card. Copy-paste SNTP configuration from the terminal into this file and modify to your needs. 00043 // 00044 // Notes: there are still some bugs in HTTPServer code. 00045 // To help fight some of them, copy a valid favicon.ico (a 16x16 icon) file to MBED. 00046 // 00047 00048 #include "mbed.h" 00049 #include "SDFileSystem.h" 00050 #include "HTTPServer.h" 00051 #include "HTTPRPC.h" 00052 #include "HTTPFS.h" 00053 #include "HTTPStaticPage.h" 00054 #include "HTTPDynamicPage.h" 00055 #include "HTTPLinkStatus.h" 00056 #include "SNTPClient.h" 00057 00058 #define CLS "\033[2J" 00059 00060 const char content[] = 00061 "<HTML>" 00062 "<HEAD>" 00063 "<title>Static Page</title>" 00064 "</HEAD>" 00065 "<BODY>" 00066 "<H1>Hello World</H1>" 00067 "<p>Page generated statically from code.</p>" 00068 "</BODY></HTML>" 00069 ; 00070 00071 #define MAX_DYNAMIC_CONTENT_LEN 2048 00072 char dynamic_content[MAX_DYNAMIC_CONTENT_LEN]; 00073 00074 const char content_fmt[] = 00075 "<HTML>" 00076 "<HEAD>" 00077 "<title>Dynamic Page</title>" 00078 "</HEAD>" 00079 "<BODY>" 00080 "<H1>Hello World</H1>" 00081 "<p>Page generated dynamically from code.</p>" 00082 "<p>URL=%s</p>" 00083 "<p>Header Fields=%s</p>" 00084 "</BODY></HTML>" 00085 ; 00086 00087 DigitalOut led1(LED1, "led1"); 00088 DigitalOut led2(LED2, "led2"); 00089 DigitalOut led3(LED3, "led3"); 00090 DigitalOut led4(LED4, "led4"); 00091 DigitalIn sw1(p9, "sw1"); 00092 DigitalIn sw2(p10, "sw2"); 00093 LocalFileSystem local("local"); 00094 SDFileSystem sd(p5, p6, p7, p8, "sd"); // MBED-BoB2 00095 00096 #include "myrpc.h" 00097 myrpc myrpc1(LED1, "myrpc1"); 00098 00099 extern Ethernet eth; // eth is defined elsewhere, avoid compiler error. 00100 Serial pc(USBTX, USBRX); 00101 int gDebug=1; 00102 float gWait = 0.005; // Main loop wait timeout 00103 00104 HTTPStatus myDynamicPage(HTTPConnection *con, HTTPDynamicPageData *pd) { 00105 #if 0 00106 // Static example. With this, we don't really need HTTPStaticPage 00107 pd->size = 0; // let it measure our page 00108 pd->page = (char*)content; // Nothing dynamic about that yet, but we can now get loose here. 00109 pd->page_free = NULL; // No mem free() needed 00110 #elif 0 00111 // Dynamic example, static buffer 00112 pd->size = sprintf(dynamic_content, content_fmt, con->getURL(), con->getHeaderFields()); 00113 pd->page = (char*)dynamic_content; 00114 pd->page_free = NULL; // No mem free() needed 00115 if(pd->size > sizeof(dynamic_content)) printf("ASSERTION FAILED: %s:%d\r\n", __FILE__, __LINE__); // Buffer overrun 00116 #else 00117 // Dynamic example, dynamic buffer 00118 int size = sizeof(content_fmt) + 512; // Just guess how much the data will expand 00119 char *buf = (char *)malloc(size); 00120 if (buf) { 00121 pd->size = sprintf(buf, content_fmt, con->getURL(), con->getHeaderFields()); 00122 pd->page = buf; 00123 pd->page_free = &free; // Use free() when done 00124 if(pd->size > size) printf("ASSERTION FAILED: %s:%d\r\n", __FILE__, __LINE__); // Buffer overrun 00125 #endif 00126 } 00127 return HTTP_OK; 00128 } 00129 00130 int main(void) { 00131 char mac[6]; 00132 int sw1_old=0, sw2_old=0; 00133 bool use_sd = false; 00134 00135 led1=1; 00136 led2=1; 00137 led3=1; 00138 led4=1; 00139 00140 // Start RTC 00141 time_t seconds = time(NULL); 00142 if (seconds == (unsigned)-1 || seconds == 0) { 00143 seconds = 1256729737; // Set RTC time to Wed, 28 Oct 2009 11:35:37 00144 set_time(seconds); 00145 printf("RTC initialized, start time %d seconds\r\n", seconds); 00146 } 00147 00148 char *hostname = "mbed"; 00149 HTTPServer http(hostname); // Use DHCP 00150 http.timeout(10000); // Sets the timout for a HTTP request. The timout is the time which is allowed to spent between two incomming TCP packets. If the time is passed the connection will be closed. 00151 00152 eth.address(mac); 00153 pc.printf(CLS "\r\n\r\nHTTPServer \"%s\" started\r\nMAC %02X:%02X:%02X:%02X:%02X:%02X\r\n%s", 00154 hostname, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5], 00155 gDebug?"Debug is ON\r\n":"" 00156 ); 00157 00158 Base::add_rpc_class<AnalogIn>(); 00159 Base::add_rpc_class<AnalogOut>(); 00160 Base::add_rpc_class<DigitalIn>(); 00161 Base::add_rpc_class<DigitalOut>(); 00162 Base::add_rpc_class<PwmOut>(); 00163 Base::add_rpc_class<Timer>(); 00164 Base::add_rpc_class<SPI>(); 00165 Base::add_rpc_class<BusOut>(); 00166 Base::add_rpc_class<BusIn>(); 00167 Base::add_rpc_class<myrpc>(); 00168 led1=0; 00169 00170 // Check if we can use SD card for the web server 00171 FILE *fp = fopen("/sd/index.htm", "r"); 00172 if (fp == NULL) { 00173 if (gDebug) printf("DEBUG: No SD card found or no index.htm file - using LocalFilesystem for WebServer.\r\n"); 00174 } else { 00175 use_sd = true; 00176 fclose(fp); 00177 if (gDebug) printf("DEBUG: Found SD card with index.htm file - using SD for WebServer.\r\n"); 00178 } 00179 00180 if (0 != SNTPReadIniFile("/sd/sntp.ini") ) 00181 SNTPReadIniFile("/local/sntp.ini"); 00182 SNTPWriteIniFile(stdout); 00183 00184 00185 http.addHandler(new HTTPLinkStatus("/", 00186 #if MBED_BOB2 00187 p25, p26, // MBED-BoB2-mods 00188 #else 00189 LED3, LED4, 00190 #endif 00191 0.1, 00192 /*do_urlfile*/ true, /*do_link_printf*/ true, /*do_log_printf*/ false, 00193 /*log_file*/ ( (gDebug>1) ? (use_sd ? "/sd/httpd.log" : "/local/httpd.log") : NULL) 00194 )); // Should be the first handler to get a preview of all requests 00195 http.addHandler(new HTTPRPC()); 00196 led2=0; 00197 00198 // Static/Dynamic pages must be installed before FileSystem on / 00199 http.addHandler(new HTTPStaticPage("/static.htm", content, strlen(content))); 00200 http.addHandler(new HTTPDynamicPage("/dynamic.htm", &myDynamicPage)); 00201 http.addHandler(new HTTPFileSystemHandler("/", use_sd ? "/sd/" : "/local/")); 00202 led3=0; 00203 00204 // FIXME: BUG If eth is not plugged, http.bind() hangs! 00205 http.bind(); 00206 00207 SNTPClientInit(); 00208 led4 = 0; 00209 00210 pc.printf("\r"); // Add linefeed for stupid Hyperterminal 00211 while(1) { 00212 http.poll(); // Have to call this method at least every 250ms to let the http server run. 00213 if (sw1 & !sw1_old) { 00214 printf("SW1\r\n"); 00215 } 00216 if (sw2 && !sw2_old) { 00217 printf(CLS "SW2\r\n"); 00218 } 00219 sw1_old = sw1; 00220 sw2_old = sw2; 00221 wait(gWait); 00222 } 00223 } 00224 00225 //END
Generated on Tue Jul 12 2022 17:12:14 by
1.7.2