* this will serve out files to HTTP clients.\r
*/\r
\r
+#define INCLUDE_FROM_HTTPSERVERAPP_C\r
#include "HTTPServerApp.h"\r
\r
/** HTTP server response header, for transmission before the page contents. This indicates to the host that a page exists at the\r
*/\r
void WebserverApp_Callback(void)\r
{\r
- uip_tcp_appstate_t* const AppState = &uip_conn->appstate;\r
- char* AppData = (char*)uip_appdata;\r
- uint16_t AppDataSize = 0;\r
+ uip_tcp_appstate_t* const AppState = &uip_conn->appstate;\r
\r
if (uip_aborted() || uip_timedout() || uip_closed())\r
{\r
- /* Check if the open file needs to be closed */\r
+ /* Connection is being terminated for some reason - close file handle if open */\r
if (AppState->FileOpen)\r
{\r
f_close(&AppState->FileHandle);\r
AppState->FileOpen = false;\r
}\r
-\r
- AppState->PrevState = WEBSERVER_STATE_Closed;\r
- AppState->CurrentState = WEBSERVER_STATE_Closed;\r
-\r
- return;\r
+ \r
+ /* Lock to the closed state so that no further processing will occur on the connection */\r
+ AppState->CurrentState = WEBSERVER_STATE_Closed;\r
+ AppState->NextState = WEBSERVER_STATE_Closed;\r
}\r
- else if (uip_connected())\r
+\r
+ if (uip_connected())\r
{\r
/* New connection - initialize connection state values */\r
- AppState->PrevState = WEBSERVER_STATE_OpenRequestedFile;\r
- AppState->CurrentState = WEBSERVER_STATE_OpenRequestedFile;\r
- AppState->FileOpen = false;\r
+ AppState->CurrentState = WEBSERVER_STATE_OpenRequestedFile;\r
+ AppState->NextState = WEBSERVER_STATE_OpenRequestedFile;\r
+ AppState->FileOpen = false;\r
+ AppState->ACKedFilePos = 0;\r
+ AppState->SentChunkSize = 0;\r
}\r
- else if (uip_rexmit())\r
+\r
+ if (uip_acked())\r
{\r
- /* Re-try last state */\r
- AppState->CurrentState = AppState->PrevState;\r
+ /* Add the amount of ACKed file data to the total sent file bytes counter */\r
+ AppState->ACKedFilePos += AppState->SentChunkSize;\r
+\r
+ /* Progress to the next state once the current state's data has been ACKed */\r
+ AppState->CurrentState = AppState->NextState;\r
}\r
- \r
- switch (AppState->CurrentState)\r
+\r
+ if (uip_rexmit() || uip_newdata() || uip_acked() || uip_connected() || uip_poll())\r
{\r
- case WEBSERVER_STATE_OpenRequestedFile:\r
- /* Wait for the packet containing the request header */\r
- if (uip_newdata())\r
- {\r
- char* RequestToken = strtok(AppData, " ");\r
- \r
- /* Must be a GET request, abort otherwise */\r
- if (strcmp(RequestToken, "GET") != 0)\r
- {\r
- uip_abort();\r
- break;\r
- }\r
- \r
- char* RequestedFileName = strtok(NULL, " ");\r
- \r
- /* If the requested filename has more that just the leading '/' path in it, copy it over */\r
- if (strlen(RequestedFileName) > 1)\r
- strncpy(AppState->FileName, &RequestedFileName[1], (sizeof(AppState->FileName) - 1));\r
- else\r
- strcpy(AppState->FileName, "index.htm");\r
-\r
- /* Ensure filename is null-terminated */\r
- AppState->FileName[(sizeof(AppState->FileName) - 1)] = 0x00;\r
+ switch (AppState->CurrentState)\r
+ {\r
+ case WEBSERVER_STATE_OpenRequestedFile:\r
+ Webserver_OpenRequestedFile();\r
+ break;\r
+ case WEBSERVER_STATE_SendResponseHeader:\r
+ Webserver_SendResponseHeader();\r
+ break;\r
+ case WEBSERVER_STATE_SendMIMETypeHeader:\r
+ Webserver_SendMIMETypeHeader(); \r
+ break;\r
+ case WEBSERVER_STATE_SendData:\r
+ Webserver_SendData();\r
+ break;\r
+ case WEBSERVER_STATE_Closing:\r
+ uip_close();\r
\r
- /* Try to open the file from the Dataflash disk */\r
- AppState->FileOpen = (f_open(&AppState->FileHandle, AppState->FileName, FA_OPEN_EXISTING | FA_READ) == FR_OK);\r
- AppState->CurrentFilePos = 0;\r
-\r
- AppState->PrevState = WEBSERVER_STATE_OpenRequestedFile;\r
- AppState->CurrentState = WEBSERVER_STATE_SendResponseHeader;\r
- }\r
+ AppState->NextState = WEBSERVER_STATE_Closed;\r
+ break;\r
+ } \r
+ } \r
+}\r
\r
- break;\r
- case WEBSERVER_STATE_SendResponseHeader:\r
- /* Determine what HTTP header should be sent to the client */\r
- if (AppState->FileOpen)\r
- {\r
- AppDataSize = strlen_P(HTTP200Header);\r
- strncpy_P(AppData, HTTP200Header, AppDataSize);\r
- }\r
- else\r
- {\r
- AppDataSize = strlen_P(HTTP404Header);\r
- strncpy_P(AppData, HTTP404Header, AppDataSize);\r
- }\r
+/** HTTP Server State handler for the Request Process state. This state manages the processing of incomming HTTP\r
+ * GET requests to the server from the receiving HTTP client.\r
+ */\r
+static void Webserver_OpenRequestedFile(void)\r
+{\r
+ uip_tcp_appstate_t* const AppState = &uip_conn->appstate;\r
+ char* AppData = (char*)uip_appdata;\r
+ \r
+ /* No HTTP header received from the client, abort processing */\r
+ if (!(uip_newdata()))\r
+ return;\r
+ \r
+ char* RequestToken = strtok(AppData, " ");\r
\r
- AppState->PrevState = WEBSERVER_STATE_SendResponseHeader;\r
- AppState->CurrentState = WEBSERVER_STATE_SendMIMETypeHeader;\r
- break;\r
- case WEBSERVER_STATE_SendMIMETypeHeader:\r
- /* File must have been found and opened for MIME header to be sent */\r
- if (AppState->FileOpen)\r
- {\r
- char* Extension = strpbrk(AppState->FileName, ".");\r
- \r
- /* Check to see if a file extension was found for the requested filename */\r
- if (Extension != NULL)\r
- {\r
- /* Look through the MIME type list, copy over the required MIME type if found */\r
- for (int i = 0; i < (sizeof(MIMETypes) / sizeof(MIMETypes[0])); i++)\r
- {\r
- if (strcmp_P(&Extension[1], MIMETypes[i].Extension) == 0)\r
- {\r
- AppDataSize = strlen_P(MIMETypes[i].MIMEType);\r
- strncpy_P(AppData, MIMETypes[i].MIMEType, AppDataSize); \r
- break;\r
- }\r
- } \r
- }\r
-\r
- /* Check if a MIME type was found and copied to the output buffer */\r
- if (!(AppDataSize))\r
- {\r
- /* MIME type not found - copy over the default MIME type */\r
- AppDataSize = strlen_P(DefaultMIMEType);\r
- strncpy_P(AppData, DefaultMIMEType, AppDataSize); \r
- }\r
- \r
- /* Add the end-of line terminator and end-of-headers terminator after the MIME type */\r
- strncpy(&AppData[AppDataSize], "\r\n\r\n", sizeof("\r\n\r\n"));\r
- AppDataSize += (sizeof("\r\n\r\n") - 1);\r
- }\r
- \r
- AppState->PrevState = WEBSERVER_STATE_SendMIMETypeHeader;\r
- AppState->CurrentState = WEBSERVER_STATE_SendData; \r
- break;\r
- case WEBSERVER_STATE_SendData:\r
- /* If end of file/file not open, progress to the close state */\r
- if (!(AppState->FileOpen) && !(uip_rexmit()))\r
- {\r
- f_close(&AppState->FileHandle);\r
- uip_close();\r
+ /* Must be a GET request, abort otherwise */\r
+ if (strcmp(RequestToken, "GET") != 0)\r
+ {\r
+ uip_abort();\r
+ return;\r
+ }\r
\r
- AppState->PrevState = WEBSERVER_STATE_Closed;\r
- AppState->CurrentState = WEBSERVER_STATE_Closed;\r
- break;\r
- }\r
+ char* RequestedFileName = strtok(NULL, " ");\r
+ \r
+ /* If the requested filename has more that just the leading '/' path in it, copy it over */\r
+ if (strlen(RequestedFileName) > 1)\r
+ strncpy(AppState->FileName, &RequestedFileName[1], (sizeof(AppState->FileName) - 1));\r
+ else\r
+ strcpy(AppState->FileName, "index.htm");\r
\r
- uint16_t MaxSegSize = uip_mss();\r
- \r
- /* Return file pointer to the last ACKed position */\r
- f_lseek(&AppState->FileHandle, AppState->CurrentFilePos);\r
+ /* Ensure filename is null-terminated */\r
+ AppState->FileName[(sizeof(AppState->FileName) - 1)] = 0x00;\r
+ \r
+ /* Try to open the file from the Dataflash disk */\r
+ AppState->FileOpen = (f_open(&AppState->FileHandle, AppState->FileName, FA_OPEN_EXISTING | FA_READ) == FR_OK);\r
+\r
+ /* Lock to the SendResponseHeader state until connection terminated */\r
+ AppState->CurrentState = WEBSERVER_STATE_SendResponseHeader;\r
+ AppState->NextState = WEBSERVER_STATE_SendResponseHeader;\r
+}\r
+\r
+/** HTTP Server State handler for the HTTP Response Header Send state. This state manages the transmission of\r
+ * the HTTP response header to the receiving HTTP client.\r
+ */\r
+static void Webserver_SendResponseHeader(void)\r
+{\r
+ uip_tcp_appstate_t* const AppState = &uip_conn->appstate;\r
+ char* AppData = (char*)uip_appdata;\r
+\r
+ char* HeaderToSend;\r
+ uint16_t HeaderLength;\r
+\r
+ /* Determine what HTTP header should be sent to the client */\r
+ if (AppState->FileOpen)\r
+ {\r
+ HeaderToSend = HTTP200Header;\r
+ AppState->NextState = WEBSERVER_STATE_SendMIMETypeHeader;\r
+ }\r
+ else\r
+ {\r
+ HeaderToSend = HTTP404Header;\r
+ AppState->NextState = WEBSERVER_STATE_Closing;\r
+ }\r
+\r
+ HeaderLength = strlen_P(HeaderToSend);\r
+ strncpy_P(AppData, HeaderToSend, HeaderLength);\r
+ uip_send(AppData, HeaderLength);\r
+}\r
+\r
+/** HTTP Server State handler for the MIME Header Send state. This state manages the transmission of the file\r
+ * MIME type header for the requested file to the receiving HTTP client.\r
+ */\r
+static void Webserver_SendMIMETypeHeader(void)\r
+{\r
+ uip_tcp_appstate_t* const AppState = &uip_conn->appstate;\r
+ char* AppData = (char*)uip_appdata;\r
\r
- /* Read the next chunk of data from the open file */\r
- f_read(&AppState->FileHandle, AppData, MaxSegSize, &AppDataSize);\r
+ char* Extension = strpbrk(AppState->FileName, ".");\r
+ uint16_t MIMEHeaderLength = 0;\r
\r
- /* If we are not re-transmitting a lost segment, advance file position */\r
- if (uip_acked() && !(uip_rexmit()))\r
+ /* Check to see if a file extension was found for the requested filename */\r
+ if (Extension != NULL)\r
+ {\r
+ /* Look through the MIME type list, copy over the required MIME type if found */\r
+ for (int i = 0; i < (sizeof(MIMETypes) / sizeof(MIMETypes[0])); i++)\r
+ {\r
+ if (strcmp_P(&Extension[1], MIMETypes[i].Extension) == 0)\r
{\r
- AppState->FileOpen = (AppDataSize > 0);\r
- AppState->CurrentFilePos += AppDataSize;\r
+ MIMEHeaderLength = strlen_P(MIMETypes[i].MIMEType);\r
+ strncpy_P(AppData, MIMETypes[i].MIMEType, MIMEHeaderLength); \r
+ break;\r
}\r
- \r
- /* Stay in the SendData state if retransmission is required until all data sent */\r
- AppState->PrevState = WEBSERVER_STATE_SendData;\r
+ } \r
+ }\r
\r
- break;\r
+ /* Check if a MIME type was found and copied to the output buffer */\r
+ if (!(MIMEHeaderLength))\r
+ {\r
+ /* MIME type not found - copy over the default MIME type */\r
+ MIMEHeaderLength = strlen_P(DefaultMIMEType);\r
+ strncpy_P(AppData, DefaultMIMEType, MIMEHeaderLength);\r
}\r
+ \r
+ /* Add the end-of line terminator and end-of-headers terminator after the MIME type */\r
+ strncpy(&AppData[MIMEHeaderLength], "\r\n\r\n", sizeof("\r\n\r\n"));\r
+ MIMEHeaderLength += (sizeof("\r\n\r\n") - 1);\r
+ \r
+ /* Send the MIME header to the receiving client */\r
+ uip_send(AppData, MIMEHeaderLength);\r
+ \r
+ /* When the MIME header is ACKed, progress to the data send stage */\r
+ AppState->NextState = WEBSERVER_STATE_SendData;\r
+}\r
\r
- /* If data has been loaded into the application buffer by the server, send it to the client */\r
- if (AppDataSize)\r
- uip_send(AppData, AppDataSize);\r
+/** HTTP Server State handler for the Data Send state. This state manages the transmission of file chunks\r
+ * to the receiving HTTP client.\r
+ */\r
+static void Webserver_SendData(void)\r
+{\r
+ uip_tcp_appstate_t* const AppState = &uip_conn->appstate;\r
+ char* AppData = (char*)uip_appdata;\r
+\r
+ /* Must determine the maximum segment size to determine maximum file chunk size */\r
+ uint16_t MaxSegmentSize = uip_mss();\r
+\r
+ /* Return file pointer to the last ACKed position */\r
+ f_lseek(&AppState->FileHandle, AppState->ACKedFilePos);\r
+ \r
+ /* Read the next chunk of data from the open file */\r
+ f_read(&AppState->FileHandle, AppData, MaxSegmentSize, &AppState->SentChunkSize);\r
+ \r
+ /* Send the next file chunk to the receiving client */\r
+ uip_send(AppData, AppState->SentChunkSize);\r
+ \r
+ /* Check if we are at the last chunk of the file, if so next ACK should close the connection */\r
+ AppState->NextState = (MaxSegmentSize != AppState->SentChunkSize) ? WEBSERVER_STATE_Closing : WEBSERVER_STATE_SendData;\r
}\r
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