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
main.cpp
- Committer:
- iva2k
- Date:
- 2010-01-08
- Revision:
- 1:ec4170739967
- Parent:
- 0:886e4b3119ad
File content as of revision 1:ec4170739967:
// Written by IVA2K // // Example of HTTPServer with additional features: // * SNTP Client (Simple NTP) // * Link status indication (LED4 or RJ45 socket LED on MBED-BoB2-mod) // * Local file system (create index.htm page on MBED!) // * SD-based WebServer // * RPC-able class (myrpc, allows remote function call that blinks LED1 N times) // * Static HTML page // * Dynamic HTML page // // Instructions: // 1 Plug MBED into MBED-BoB2 (or other ETH connector breakout) // 2 Plug ETH connector into your network (needs DHCP to get IP address and Internet connection) // 3 Power up MBED using USB cable // 4 Install MBED serial driver (http://mbed.org/handbook/SerialPC) // 5 Copy compiled .bin to your MBED (make sure target device selected in the compiler is correct) // 6 Open terminal on the mbed serial port // 7 Push MBED reset button // 8 Terminal will display info message with mac address, followed by IP address (if connection succeeds) // in the following items, replace 10.0.0.321 with actual MBED IP address from the terminal // 9 Open browser and enter the following URL: // http://10.0.0.321/rpc/myrpc1/blink,10 // 10 MBED will blink the LED 10 times // 11 Open browser and enter the following URL: // http://10.0.0.321/rpc/myrpc1/gettime // 12 The browser will show date and time from the MBED synchronized to NTP server // 13 Open browser and enter the following URL: // http://10.0.0.321/static.htm // 14 The browser will show static HTML page // 15 Open browser and enter the following URL: // http://10.0.0.321/dynamic.htm // 16 The browser will show dynamic HTML page // 17 Create a simple index.htm page on the MBED // 18 Open browser and enter the following URL: // http://10.0.0.321 // 19 The browser will show index HTML page // 20 Create a simple index.htm page on a micro SD card, plug the card into MBED-BoB2 // 21 Open browser and enter the following URL: // http://10.0.0.321 // 22 The browser will show index HTML page from SD card // 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. // // Notes: there are still some bugs in HTTPServer code. // To help fight some of them, copy a valid favicon.ico (a 16x16 icon) file to MBED. // #include "mbed.h" #include "SDFileSystem.h" #include "HTTPServer.h" #include "HTTPRPC.h" #include "HTTPFS.h" #include "HTTPStaticPage.h" #include "HTTPDynamicPage.h" #include "HTTPLinkStatus.h" #include "SNTPClient.h" #define CLS "\033[2J" const char content[] = "<HTML>" "<HEAD>" "<title>Static Page</title>" "</HEAD>" "<BODY>" "<H1>Hello World</H1>" "<p>Page generated statically from code.</p>" "</BODY></HTML>" ; #define MAX_DYNAMIC_CONTENT_LEN 2048 char dynamic_content[MAX_DYNAMIC_CONTENT_LEN]; const char content_fmt[] = "<HTML>" "<HEAD>" "<title>Dynamic Page</title>" "</HEAD>" "<BODY>" "<H1>Hello World</H1>" "<p>Page generated dynamically from code.</p>" "<p>URL=%s</p>" "<p>Header Fields=%s</p>" "</BODY></HTML>" ; DigitalOut led1(LED1, "led1"); DigitalOut led2(LED2, "led2"); DigitalOut led3(LED3, "led3"); DigitalOut led4(LED4, "led4"); DigitalIn sw1(p9, "sw1"); DigitalIn sw2(p10, "sw2"); LocalFileSystem local("local"); SDFileSystem sd(p5, p6, p7, p8, "sd"); // MBED-BoB2 #include "myrpc.h" myrpc myrpc1(LED1, "myrpc1"); extern Ethernet eth; // eth is defined elsewhere, avoid compiler error. Serial pc(USBTX, USBRX); int gDebug=1; float gWait = 0.005; // Main loop wait timeout HTTPStatus myDynamicPage(HTTPConnection *con, HTTPDynamicPageData *pd) { #if 0 // Static example. With this, we don't really need HTTPStaticPage pd->size = 0; // let it measure our page pd->page = (char*)content; // Nothing dynamic about that yet, but we can now get loose here. pd->page_free = NULL; // No mem free() needed #elif 0 // Dynamic example, static buffer pd->size = sprintf(dynamic_content, content_fmt, con->getURL(), con->getHeaderFields()); pd->page = (char*)dynamic_content; pd->page_free = NULL; // No mem free() needed if(pd->size > sizeof(dynamic_content)) printf("ASSERTION FAILED: %s:%d\r\n", __FILE__, __LINE__); // Buffer overrun #else // Dynamic example, dynamic buffer int size = sizeof(content_fmt) + 512; // Just guess how much the data will expand char *buf = (char *)malloc(size); if (buf) { pd->size = sprintf(buf, content_fmt, con->getURL(), con->getHeaderFields()); pd->page = buf; pd->page_free = &free; // Use free() when done if(pd->size > size) printf("ASSERTION FAILED: %s:%d\r\n", __FILE__, __LINE__); // Buffer overrun #endif } return HTTP_OK; } int main(void) { char mac[6]; int sw1_old=0, sw2_old=0; bool use_sd = false; led1=1; led2=1; led3=1; led4=1; // Start RTC time_t seconds = time(NULL); if (seconds == (unsigned)-1 || seconds == 0) { seconds = 1256729737; // Set RTC time to Wed, 28 Oct 2009 11:35:37 set_time(seconds); printf("RTC initialized, start time %d seconds\r\n", seconds); } char *hostname = "mbed"; HTTPServer http(hostname); // Use DHCP 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. eth.address(mac); pc.printf(CLS "\r\n\r\nHTTPServer \"%s\" started\r\nMAC %02X:%02X:%02X:%02X:%02X:%02X\r\n%s", hostname, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5], gDebug?"Debug is ON\r\n":"" ); Base::add_rpc_class<AnalogIn>(); Base::add_rpc_class<AnalogOut>(); Base::add_rpc_class<DigitalIn>(); Base::add_rpc_class<DigitalOut>(); Base::add_rpc_class<PwmOut>(); Base::add_rpc_class<Timer>(); Base::add_rpc_class<SPI>(); Base::add_rpc_class<BusOut>(); Base::add_rpc_class<BusIn>(); Base::add_rpc_class<myrpc>(); led1=0; // Check if we can use SD card for the web server FILE *fp = fopen("/sd/index.htm", "r"); if (fp == NULL) { if (gDebug) printf("DEBUG: No SD card found or no index.htm file - using LocalFilesystem for WebServer.\r\n"); } else { use_sd = true; fclose(fp); if (gDebug) printf("DEBUG: Found SD card with index.htm file - using SD for WebServer.\r\n"); } if (0 != SNTPReadIniFile("/sd/sntp.ini") ) SNTPReadIniFile("/local/sntp.ini"); SNTPWriteIniFile(stdout); http.addHandler(new HTTPLinkStatus("/", #if MBED_BOB2 p25, p26, // MBED-BoB2-mods #else LED3, LED4, #endif 0.1, /*do_urlfile*/ true, /*do_link_printf*/ true, /*do_log_printf*/ false, /*log_file*/ ( (gDebug>1) ? (use_sd ? "/sd/httpd.log" : "/local/httpd.log") : NULL) )); // Should be the first handler to get a preview of all requests http.addHandler(new HTTPRPC()); led2=0; // Static/Dynamic pages must be installed before FileSystem on / http.addHandler(new HTTPStaticPage("/static.htm", content, strlen(content))); http.addHandler(new HTTPDynamicPage("/dynamic.htm", &myDynamicPage)); http.addHandler(new HTTPFileSystemHandler("/", use_sd ? "/sd/" : "/local/")); led3=0; // FIXME: BUG If eth is not plugged, http.bind() hangs! http.bind(); SNTPClientInit(); led4 = 0; pc.printf("\r"); // Add linefeed for stupid Hyperterminal while(1) { http.poll(); // Have to call this method at least every 250ms to let the http server run. if (sw1 & !sw1_old) { printf("SW1\r\n"); } if (sw2 && !sw2_old) { printf(CLS "SW2\r\n"); } sw1_old = sw1; sw2_old = sw2; wait(gWait); } } //END