Rob Dobson
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.
Revision 0:b5b4d07f7827, committed 2013-09-18
- Comitter:
- Bobty
- Date:
- Wed Sep 18 21:36:50 2013 +0000
- Child:
- 1:75bb184de749
- Commit message:
- Initial
Changed in this revision
| RdWebServer.cpp | Show annotated file Show diff for this revision Revisions of this file |
| RdWebServer.h | Show annotated file Show diff for this revision Revisions of this file |
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/RdWebServer.cpp Wed Sep 18 21:36:50 2013 +0000
@@ -0,0 +1,105 @@
+#include "RdWebServer.h"
+
+RdWebServer::RdWebServer()
+{
+ _serverIsListening = false;
+ _pStatusLed = NULL;
+}
+
+RdWebServer::~RdWebServer()
+{
+}
+
+bool RdWebServer::init(int port, DigitalOut* pStatusLed)
+{
+ _port = port;
+ _pStatusLed = pStatusLed;
+
+// _socketSrv.set_blocking(true);
+
+
+ //setup tcp socket
+ if(_socketSrv.bind(port)< 0)
+ {
+ printf("tcp server bind failed.\n\r");
+ return false;
+ }
+ else
+ {
+ printf("tcp server bind successed.\n\r");
+ _serverIsListening = true;
+ }
+
+ if(_socketSrv.listen(1) < 0)
+ {
+ printf("tcp server listen failed.\n\r");
+ return false;
+ }
+ else
+ {
+ printf("tcp server is listening...\n\r");
+ }
+
+ return true;
+}
+
+
+void RdWebServer::run()
+{
+ TCPSocketConnection client;
+ bool clientIsConnected = false;
+
+ //listening for http GET request
+ while (isListening())
+ {
+ //blocking mode(never timeout)
+ if(_socketSrv.accept(client)<0)
+ {
+ printf("failed to accept connection.\n\r");
+ }
+ else
+ {
+ printf("connection success!\n\rIP: %s\n\r",client.get_address());
+ clientIsConnected = true;
+ if (_pStatusLed != NULL)
+ *_pStatusLed = true;
+
+ while(clientIsConnected)
+ {
+ char buffer[1024] = {};
+ switch(client.receive(buffer, 1023))
+ {
+ case 0:
+ printf("recieved buffer is empty.\n\r");
+ clientIsConnected = false;
+ break;
+ case -1:
+ printf("failed to read data from client.\n\r");
+ clientIsConnected = false;
+ break;
+ default:
+ printf("Recieved Data: %d\n\r\n\r%.*s\n\r",strlen(buffer),strlen(buffer),buffer);
+ if(buffer[0] == 'G' && buffer[1] == 'E' && buffer[2] == 'T' )
+ {
+ printf("GET request incomming.\n\r");
+
+
+ //setup http response header & data
+ char echoHeader[256] = {};
+ sprintf(echoHeader,"HTTP/1.1 200 OK\n\rContent-Length: %d\n\rContent-Type: text\n\rConnection: Close\n\r\n\r",strlen(buffer));
+ client.send(echoHeader,strlen(echoHeader));
+ client.send(buffer,strlen(buffer));
+ clientIsConnected = false;
+ printf("echo back done.\n\r");
+ }
+ break;
+ }
+ }
+ printf("close connection.\n\rtcp server is listening...\n\r");
+ client.close();
+ if (_pStatusLed != NULL)
+ *_pStatusLed = false;
+ }
+ }
+}
+
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/RdWebServer.h Wed Sep 18 21:36:50 2013 +0000
@@ -0,0 +1,30 @@
+#ifndef RD_WEB_SERVER
+#define RD_WEB_SERVER
+
+#include <map>
+
+#include "mbed.h"
+#include "EthernetInterface.h"
+
+class RdWebServer
+{
+ public :
+
+ RdWebServer();
+ virtual ~RdWebServer();
+
+ bool init(int port, DigitalOut* pStatusLed);
+ void run();
+ bool isListening()
+ {
+ return _serverIsListening;
+ };
+
+ private :
+ int _port;
+ DigitalOut* _pStatusLed;
+ TCPSocketServer _socketSrv;
+ bool _serverIsListening;
+};
+
+#endif