A simple web server mainly based on ideas from Jasper Schuurmans Netduino web server
Dependents: RdBlindsServer SpideyWallWeb RdGasUseMonitor
A fast and reliable web server for MBED! http://robdobson.com/2015/08/a-reliable-mbed-webserver/
It has a very neat way to implement REST commands and can serve files from local storage (on LPC1768 for instance) and from SD cards. It also has a caching facility which is particularly useful for serving files from local storage.
The server can be run in the main() thread (and has a sub-2ms response time if this is done) or in a mbed-rtos thread which increases the response time to (a still respectable) 30ms or so.
The latest project that uses this is here - https://developer.mbed.org/users/Bobty/code/SpideyWallWeb/
int main (void) { // Ethernet interface EthernetInterface::init(); // Connect ethernet EthernetInterface::connect(); // Init the web server pc.printf("Starting web server\r\n"); char* baseWebFolder = "/sd/"; // should be /sd/ for SDcard files - not used for local file system RdWebServer webServer; // Add commands to handle the home page and favicon webServer.addCommand("", RdWebServerCmdDef::CMD_LOCALFILE, NULL, "index.htm", true); webServer.addCommand("favicon.ico", RdWebServerCmdDef::CMD_LOCALFILE, NULL, NULL, true); // Add the lightwall control commands webServer.addCommand("name", RdWebServerCmdDef::CMD_CALLBACK, &lightwallGetSystemName); webServer.addCommand("clear", RdWebServerCmdDef::CMD_CALLBACK, &lightwallClear); webServer.addCommand("rawfill", RdWebServerCmdDef::CMD_CALLBACK, &lightwallRawFill); webServer.addCommand("fill", RdWebServerCmdDef::CMD_CALLBACK, &lightwallFill); webServer.addCommand("showleds", RdWebServerCmdDef::CMD_CALLBACK, &lightwallShowLeds); // Start the server webServer.init(WEBPORT, &led4, baseWebFolder); webServer.run(); } // Get system name - No arguments required char* lightwallGetSystemName(int method, char*cmdStr, char* argStr, char* msgBuffer, int msgLen, int contentLen, unsigned char* pPayload, int payloadLen, int splitPayloadPos) { // Perform any required actions here .... // ... // Return the system name return systemName; }
This server was originally based on a Netduino web server from Jasper Schuurmans but has been optimised for speed.
Diff: RdWebServer.cpp
- Revision:
- 8:de915bd70ec1
- Parent:
- 7:fe7c33f7fbb8
- Child:
- 9:35668248199b
--- a/RdWebServer.cpp Sat Feb 07 10:34:09 2015 +0000 +++ b/RdWebServer.cpp Fri Feb 20 08:53:08 2015 +0000 @@ -68,15 +68,15 @@ char argStr[MAX_ARGSTR_LEN]; if (extractCmdArgs(_buffer+3, cmdStr, MAX_CMDSTR_LEN, argStr, MAX_ARGSTR_LEN)) { - pc.printf("CmdStr %s\n\r", cmdStr); - pc.printf("ArgStr %s\n\r", argStr); +// pc.printf("CmdStr %s\n\r", cmdStr); +// pc.printf("ArgStr %s\n\r", argStr); bool cmdFound = false; for (std::vector<RdWebServerCmdDef*>::iterator it = _commands.begin() ; it != _commands.end(); ++it) { // pc.printf("Testing <<%s>> with <<%s>>\r\n", (*it)->_pCmdStr, cmdStr); if (strcasecmp((*it)->_pCmdStr, cmdStr) == 0) { - pc.printf("FoundCmd <%s> Type %d\n\r", cmdStr, (*it)->_cmdType); +// pc.printf("FoundCmd <%s> Type %d\n\r", cmdStr, (*it)->_cmdType); cmdFound = true; if ((*it)->_cmdType == RdWebServerCmdDef::CMD_CALLBACK) { @@ -108,10 +108,11 @@ void RdWebServer::run() { + TCPSocketConnection client; + Timer connectLimitTimer; - while (1) + while (isListening()) { - TCPSocketConnection client; pc.printf("Waiting for TCP connection\r\n"); if(_socketSrv.accept(client)<0) { @@ -119,33 +120,55 @@ } else { + client.set_blocking(false, 1000); pc.printf("Connection from IP: %s\n\r",client.get_address()); if (_pStatusLed != NULL) *_pStatusLed = true; - - // Get received data - int rxLen = client.receive(_buffer, HTTPD_MAX_REQ_LENGTH); - if (rxLen == -1) + + connectLimitTimer.reset(); + connectLimitTimer.start(); + while(true) { - continue; - } - else if (rxLen == 0) - { - pc.printf("received buffer is empty.\n\r"); - continue; + // Check connection timer - 10 seconds timeout on HTTP operation + if (connectLimitTimer.read() >= 10) + { + pc.printf("Connection timed out\n\r"); + break; + } + // Get received data + int rxLen = client.receive(_buffer, HTTPD_MAX_REQ_LENGTH); + if (rxLen == -1) + { + continue; + } + else if (rxLen == 0) + { + pc.printf("received buffer is empty.\n\r"); + continue; + } + else if (rxLen > HTTPD_MAX_REQ_LENGTH) + { + sprintf(_httpHeader,"HTTP/1.1 413 Request Entity Too Large \r\nContent-Type: text\r\nConnection: Close\r\n\r\n"); + client.send(_httpHeader,strlen(_httpHeader)); + client.send(_buffer, rxLen); + continue; + } + _buffer[rxLen] = '\0'; + + // Handle buffer + handleReceivedHttp(client); + + // Done + break; } - else if (rxLen > HTTPD_MAX_REQ_LENGTH) - { - sprintf(_httpHeader,"HTTP/1.1 413 Request Entity Too Large \r\nContent-Type: text\r\nConnection: Close\r\n\r\n"); - client.send(_httpHeader,strlen(_httpHeader)); - client.send(_buffer, rxLen); - continue; - } - _buffer[rxLen] = '\0'; - - // Handle buffer - handleReceivedHttp(client); + + // Connection now closed + printf("Connection closed ...\r\n"); + client.close(); + if (_pStatusLed != NULL) + *_pStatusLed = false; } + } } @@ -159,12 +182,12 @@ const int HTTPD_MAX_FNAME_LENGTH = 127; char filename[HTTPD_MAX_FNAME_LENGTH+1]; - pc.printf("Requesting file %s\n\r", inFileName); +// pc.printf("Requesting file %s\n\r", inFileName); char *lstchr = strrchr(inFileName, NULL) -1; if ('/' == *lstchr) { - pc.printf("Request file %s%s\n", _pBaseWebFolder, inFileName); + pc.printf("Request directory %s%s\n", _pBaseWebFolder, inFileName); *lstchr = 0; sprintf(filename, "%s%s", _pBaseWebFolder, inFileName); DIR *d = opendir(filename);