Ilya I
Example program with HTTPServer and sensor data streaming over TCPSockets, using Donatien Garnier's Net APIs and services code on top of LWIP. Files StreamServer.h and .cpp encapsulate streaming over TCPSockets. Broadcast is done by sendToAll(), and all incoming data is echoed back to the client. Echo code can be replaced with some remote control of the streaming interface. See main() that shows how to periodically send some data to all subscribed clients. To subscribe, a client should open a socket at <mbed_ip> port 123. I used few lines in TCL code to set up a quick sink for the data. HTTP files are served on port 80 concurrently to the streaming.
HttpServerTcpSockets.cpp@1:3ee499525aa5, 2010-06-14 (annotated)
- Committer:
- iva2k
- Date:
- Mon Jun 14 03:24:33 2010 +0000
- Revision:
- 1:3ee499525aa5
- Parent:
- 0:e614f7875b60
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| iva2k | 0:e614f7875b60 | 1 | #define MY_DEBUG_LEVEL 2 |
| iva2k | 0:e614f7875b60 | 2 | #define MBED_BOB2 1 |
| iva2k | 0:e614f7875b60 | 3 | #define USE_SD 0 |
| iva2k | 0:e614f7875b60 | 4 | |
| iva2k | 0:e614f7875b60 | 5 | #include "mbed.h" |
| iva2k | 0:e614f7875b60 | 6 | #include "EthernetNetIf.h" |
| iva2k | 0:e614f7875b60 | 7 | #include "HTTPServer.h" |
| iva2k | 0:e614f7875b60 | 8 | #include "StreamServer.h" |
| iva2k | 0:e614f7875b60 | 9 | |
| iva2k | 0:e614f7875b60 | 10 | #if USE_SD |
| iva2k | 0:e614f7875b60 | 11 | #include "SDFileSystem.h" |
| iva2k | 0:e614f7875b60 | 12 | #endif |
| iva2k | 0:e614f7875b60 | 13 | |
| iva2k | 0:e614f7875b60 | 14 | DigitalOut led1(LED1, "led1"); |
| iva2k | 0:e614f7875b60 | 15 | DigitalOut led2(LED2, "led2"); |
| iva2k | 0:e614f7875b60 | 16 | DigitalOut led3(LED3, "led3"); |
| iva2k | 0:e614f7875b60 | 17 | DigitalOut led4(LED4, "led4"); |
| iva2k | 0:e614f7875b60 | 18 | |
| iva2k | 0:e614f7875b60 | 19 | //LocalFileSystem fs("webfs"); |
| iva2k | 0:e614f7875b60 | 20 | LocalFileSystem local("webfs"); |
| iva2k | 0:e614f7875b60 | 21 | #if USE_SD |
| iva2k | 0:e614f7875b60 | 22 | SDFileSystem sd(p5, p6, p7, p8, "sd"); // MBED-BoB2 |
| iva2k | 0:e614f7875b60 | 23 | #endif |
| iva2k | 0:e614f7875b60 | 24 | |
| iva2k | 0:e614f7875b60 | 25 | EthernetNetIf eth; |
| iva2k | 0:e614f7875b60 | 26 | //#if 0 // Fixed address |
| iva2k | 0:e614f7875b60 | 27 | //EthernetNetIf eth( |
| iva2k | 0:e614f7875b60 | 28 | // IpAddr(192,168,0,101), //IP Address |
| iva2k | 0:e614f7875b60 | 29 | // IpAddr(255,255,255,0), //Network Mask |
| iva2k | 0:e614f7875b60 | 30 | // IpAddr(192,168,0,1), //Gateway |
| iva2k | 0:e614f7875b60 | 31 | // IpAddr(192,168,0,1) //DNS |
| iva2k | 0:e614f7875b60 | 32 | //); |
| iva2k | 0:e614f7875b60 | 33 | //#endif |
| iva2k | 0:e614f7875b60 | 34 | HTTPServer svr; |
| iva2k | 0:e614f7875b60 | 35 | StreamServer stream; |
| iva2k | 1:3ee499525aa5 | 36 | Serial pc(USBTX, USBRX); |
| iva2k | 0:e614f7875b60 | 37 | |
| iva2k | 0:e614f7875b60 | 38 | int gDebug=MY_DEBUG_LEVEL; |
| iva2k | 0:e614f7875b60 | 39 | float gWait = 0.005; // Main loop wait timeout |
| iva2k | 0:e614f7875b60 | 40 | |
| iva2k | 0:e614f7875b60 | 41 | int main() { |
| iva2k | 0:e614f7875b60 | 42 | bool use_sd = false; |
| iva2k | 0:e614f7875b60 | 43 | unsigned int cnt = 0; |
| iva2k | 0:e614f7875b60 | 44 | |
| iva2k | 1:3ee499525aa5 | 45 | pc.baud(115200); |
| iva2k | 0:e614f7875b60 | 46 | Base::add_rpc_class<DigitalOut>(); |
| iva2k | 0:e614f7875b60 | 47 | |
| iva2k | 0:e614f7875b60 | 48 | printf("\r\nSetting up...\r\n"); |
| iva2k | 0:e614f7875b60 | 49 | EthernetErr ethErr = eth.setup(); |
| iva2k | 0:e614f7875b60 | 50 | if(ethErr) |
| iva2k | 0:e614f7875b60 | 51 | { |
| iva2k | 0:e614f7875b60 | 52 | printf("Error %d in setup.\n", ethErr); |
| iva2k | 0:e614f7875b60 | 53 | return -1; |
| iva2k | 0:e614f7875b60 | 54 | } |
| iva2k | 0:e614f7875b60 | 55 | printf("\r\nSetup OK\r\n"); |
| iva2k | 0:e614f7875b60 | 56 | |
| iva2k | 0:e614f7875b60 | 57 | #if USE_SD |
| iva2k | 0:e614f7875b60 | 58 | // Check if we can use SD card for the web server |
| iva2k | 0:e614f7875b60 | 59 | FILE *fp = fopen("/sd/index.htm", "r"); |
| iva2k | 0:e614f7875b60 | 60 | if (fp == NULL) { |
| iva2k | 0:e614f7875b60 | 61 | if (gDebug) printf("DEBUG: No SD card found or no index.htm file - using LocalFilesystem for WebServer.\r\n"); |
| iva2k | 0:e614f7875b60 | 62 | } else { |
| iva2k | 0:e614f7875b60 | 63 | use_sd = true; |
| iva2k | 0:e614f7875b60 | 64 | fclose(fp); |
| iva2k | 0:e614f7875b60 | 65 | if (gDebug) printf("DEBUG: Found SD card with index.htm file - using SD for WebServer.\r\n"); |
| iva2k | 0:e614f7875b60 | 66 | } |
| iva2k | 0:e614f7875b60 | 67 | #endif |
| iva2k | 0:e614f7875b60 | 68 | |
| iva2k | 0:e614f7875b60 | 69 | svr.addHandler<SimpleHandler>("/hello"); |
| iva2k | 0:e614f7875b60 | 70 | svr.addHandler<RPCHandler>("/rpc"); |
| iva2k | 0:e614f7875b60 | 71 | svr.addHandler<FSHandler>(""); //Default handler |
| iva2k | 0:e614f7875b60 | 72 | //FIXME: can't use this: , use_sd ? "/sd/" : "/local/"); |
| iva2k | 0:e614f7875b60 | 73 | //Example : Access to mbed.htm : http://a.b.c.d/webfs/mbed.htm |
| iva2k | 0:e614f7875b60 | 74 | |
| iva2k | 0:e614f7875b60 | 75 | svr.bind(80); |
| iva2k | 0:e614f7875b60 | 76 | |
| iva2k | 0:e614f7875b60 | 77 | printf("\r\nHTTP Listening...\r\n"); |
| iva2k | 0:e614f7875b60 | 78 | |
| iva2k | 0:e614f7875b60 | 79 | //#### STREAM SOCKETS |
| iva2k | 0:e614f7875b60 | 80 | stream.bind(123); |
| iva2k | 0:e614f7875b60 | 81 | |
| iva2k | 0:e614f7875b60 | 82 | Timer tm; |
| iva2k | 0:e614f7875b60 | 83 | tm.start(); |
| iva2k | 0:e614f7875b60 | 84 | //Listen indefinitely |
| iva2k | 0:e614f7875b60 | 85 | while(true) |
| iva2k | 0:e614f7875b60 | 86 | { |
| iva2k | 0:e614f7875b60 | 87 | Net::poll(); |
| iva2k | 0:e614f7875b60 | 88 | if(tm.read()>.5) |
| iva2k | 0:e614f7875b60 | 89 | { |
| iva2k | 0:e614f7875b60 | 90 | led1=!led1; //Show that we are alive |
| iva2k | 0:e614f7875b60 | 91 | if ((cnt % 4) == 0) { |
| iva2k | 0:e614f7875b60 | 92 | char buf[100]; |
| iva2k | 0:e614f7875b60 | 93 | int len = sprintf(buf, ".tick.%d======================================================================\r\n", cnt); |
| iva2k | 0:e614f7875b60 | 94 | stream.sendToAll(buf, len); |
| iva2k | 1:3ee499525aa5 | 95 | printf("%s - %d clients\r\n", buf, stream.countClients()); |
| iva2k | 1:3ee499525aa5 | 96 | // printf(".tick.%d - %d clients\r\n", cnt, stream.countClients()); |
| iva2k | 0:e614f7875b60 | 97 | } |
| iva2k | 0:e614f7875b60 | 98 | tm.start(); |
| iva2k | 0:e614f7875b60 | 99 | cnt++; |
| iva2k | 0:e614f7875b60 | 100 | } |
| iva2k | 1:3ee499525aa5 | 101 | // wait(gWait); |
| iva2k | 0:e614f7875b60 | 102 | } |
| iva2k | 0:e614f7875b60 | 103 | |
| iva2k | 0:e614f7875b60 | 104 | return 0; |
| iva2k | 0:e614f7875b60 | 105 | |
| iva2k | 0:e614f7875b60 | 106 | } |