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.h
- Revision:
- 24:27800de38eab
- Parent:
- 23:0fc3d7b5e596
- Child:
- 26:3c4c10e989b1
--- a/RdWebServer.h Mon Aug 31 08:54:17 2015 +0000 +++ b/RdWebServer.h Mon Aug 31 15:00:41 2015 +0000 @@ -53,6 +53,9 @@ #define RD_ERR(x, ...) #endif +// Length of strings +const int MAX_CMDSTR_LEN = 100; +const int MAX_ARGSTR_LEN = 100; const int SUBST_MAX_FNAME_LEN = 40; // note local files on MBED are 8.3 but this might include other files extern RawSerial pc; @@ -79,7 +82,8 @@ int _nFileLen; }; -typedef char* (*CmdCallbackType)(int method, char*cmdStr, char* argStr, char* msgBuffer); +typedef char* (*CmdCallbackType)(int method, char*cmdStr, char* argStr, char* msgBuffer, int msgLen, + int contentLen, unsigned char* pPayload, int payloadLen, int splitPayloadPos); class RdWebServerCmdDef { @@ -131,8 +135,8 @@ void run(); void addCommand(char* pCmdStr, int cmdType, CmdCallbackType callback = NULL, char* substFileName = NULL, bool cacheIfPossible = false); - static unsigned char* getPayloadDataFromMsg(char* msgBuf); - static int getPayloadLengthFromMsg(char* msgBuf); + static unsigned char* getPayloadDataFromMsg(char* msgBuf, int msgLen, int& payloadLen); + static int getContentLengthFromMsg(char* msgBuf); private : int _port; @@ -141,10 +145,11 @@ bool _initOk; std::vector<RdWebServerCmdDef*> _commands; std::vector<RdFileCacheEntry*> _cachedFiles; - bool extractCmdArgs(char* buf, char* pCmdStr, int maxCmdStrLen, char* pArgStr, int maxArgStrLen); + bool extractCmdArgs(char* buf, char* pCmdStr, int maxCmdStrLen, char* pArgStr, int maxArgStrLen, int& contentLen); char* _pBaseWebFolder; char _httpHeader[HTTPD_MAX_HDR_LENGTH+1]; char _buffer[HTTPD_MAX_REQ_LENGTH+1]; + int _bufferReceivedLen; bool handleLocalFileRequest(char* cmdStr, char* argStr, TCPSocketConnection &client, bool bCacheIfPossible); bool handleSDFileRequest(char* cmdStr, char* argStr, TCPSocketConnection &client); @@ -159,6 +164,14 @@ int _timeoutOnBlocking; bool _closeConnAfterSend; bool _closeConnOnReceiveFail; + + // Handling of split payloads on receipt (e.g. POST) + int _curSplitPayloadPos; + char _curCmdStr[MAX_CMDSTR_LEN]; + char _curArgStr[MAX_ARGSTR_LEN]; + int _curContentLen; + int _curHttpMethod; + RdWebServerCmdDef* _curWebServerCmdDef; };