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Diffstat (limited to 'Projects/Webserver/Lib/HTTPServerApp.c')
| -rw-r--r-- | Projects/Webserver/Lib/HTTPServerApp.c | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/Projects/Webserver/Lib/HTTPServerApp.c b/Projects/Webserver/Lib/HTTPServerApp.c new file mode 100644 index 000000000..01aab76ea --- /dev/null +++ b/Projects/Webserver/Lib/HTTPServerApp.c @@ -0,0 +1,177 @@ +/*
+ LUFA Library
+ Copyright (C) Dean Camera, 2010.
+
+ dean [at] fourwalledcubicle [dot] com
+ www.fourwalledcubicle.com
+*/
+
+/*
+ Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com)
+
+ Permission to use, copy, modify, distribute, and sell this
+ software and its documentation for any purpose is hereby granted
+ without fee, provided that the above copyright notice appear in
+ all copies and that both that the copyright notice and this
+ permission notice and warranty disclaimer appear in supporting
+ documentation, and that the name of the author not be used in
+ advertising or publicity pertaining to distribution of the
+ software without specific, written prior permission.
+
+ The author disclaim all warranties with regard to this
+ software, including all implied warranties of merchantability
+ and fitness. In no event shall the author be liable for any
+ special, indirect or consequential damages or any damages
+ whatsoever resulting from loss of use, data or profits, whether
+ in an action of contract, negligence or other tortious action,
+ arising out of or in connection with the use or performance of
+ this software.
+*/
+
+/** \file
+ *
+ * Simple HTTP Webserver Application. When connected to the uIP stack,
+ * this will serve out files to HTTP clients.
+ */
+
+#include "HTTPServerApp.h"
+
+/** HTTP server response header, for transmission before the page contents. This indicates to the host that a page exists at the
+ * given location, and gives extra connection information.
+ */
+char PROGMEM HTTP200Header[] = "HTTP/1.1 200 OK\r\n"
+ "Server: LUFA RNDIS\r\n"
+ "Content-type: text/html\r\n"
+ "Connection: close\r\n\r\n";
+
+/** HTTP server response header, for transmission before a resource not found error. This indicates to the host that the given
+ * given URL is invalid, and gives extra error information.
+ */
+char PROGMEM HTTP404Header[] = "HTTP/1.1 404 Not Found\r\n"
+ "Server: LUFA RNDIS\r\n"
+ "Connection: close\r\n\r\n"
+ "The requested file was not found.";
+
+/** FAT Fs structure to hold the internal state of the FAT driver for the dataflash contents. */
+FATFS DiskFATState;
+
+/** Initialization function for the simple HTTP webserver. */
+void WebserverApp_Init(void)
+{
+ /* Listen on port 80 for HTTP connections from hosts */
+ uip_listen(HTONS(HTTP_SERVER_PORT));
+
+ /* Mount the dataflash disk via FatFS */
+ f_mount(0, &DiskFATState);
+}
+
+/** uIP stack application callback for the simple HTTP webserver. This function must be called each time the
+ * TCP/IP stack needs a TCP packet to be processed.
+ */
+void WebserverApp_Callback(void)
+{
+ uip_tcp_appstate_t* const AppState = &uip_conn->appstate;
+ char* AppData = (char*)uip_appdata;
+ uint16_t AppDataSize = 0;
+
+ if (uip_aborted() || uip_timedout())
+ {
+ /* Close the file before terminating, if it is open */
+ f_close(&AppState->FileToSend);
+
+ AppState->CurrentState = WEBSERVER_STATE_Closed;
+
+ return;
+ }
+ else if (uip_closed())
+ {
+ /* Completed connection, just return */
+ return;
+ }
+ else if (uip_connected())
+ {
+ /* New connection - initialize connection state and data pointer to the appropriate HTTP header */
+ AppState->CurrentState = WEBSERVER_STATE_OpenRequestedFile;
+ }
+
+ switch (AppState->CurrentState)
+ {
+ case WEBSERVER_STATE_OpenRequestedFile:
+ /* Wait for the packet containing the request header */
+ if (uip_datalen())
+ {
+ /* Must be a GET request, abort otherwise */
+ if (strncmp(AppData, "GET ", (sizeof("GET ") - 1)) != 0)
+ {
+ uip_abort();
+ break;
+ }
+
+ char FileName[13];
+
+ /* Copy over the requested filename from the GET request */
+ for (uint8_t i = 0; i < (sizeof(FileName) - 1); i++)
+ {
+ FileName[i] = AppData[sizeof("GET ") + i];
+
+ if (FileName[i] == ' ')
+ {
+ FileName[i] = 0x00;
+ break;
+ }
+ }
+
+ /* Ensure requested filename is null-terminated */
+ FileName[(sizeof(FileName) - 1)] = 0x00;
+
+ /* If no filename specified, assume the default of INDEX.HTM */
+ if (FileName[0] == 0x00)
+ strcpy(FileName, "INDEX.HTM");
+
+ /* Try to open the file from the Dataflash disk */
+ AppState->FileOpen = (f_open(&AppState->FileToSend, FileName, FA_OPEN_EXISTING | FA_READ) == FR_OK);
+
+ AppState->CurrentState = WEBSERVER_STATE_SendHeaders;
+ }
+
+ break;
+ case WEBSERVER_STATE_SendHeaders:
+ /* Determine what HTTP header should be sent to the client */
+ if (AppState->FileOpen)
+ {
+ AppDataSize = strlen_P(HTTP200Header);
+ strncpy_P(AppData, HTTP200Header, AppDataSize);
+ }
+ else
+ {
+ AppDataSize = strlen_P(HTTP404Header);
+ strncpy_P(AppData, HTTP404Header, AppDataSize);
+ }
+
+ uip_send(AppData, AppDataSize);
+
+ AppState->CurrentState = WEBSERVER_STATE_SendData;
+ break;
+ case WEBSERVER_STATE_SendData:
+ /* If end of file/file not open, progress to the close state */
+ if (!(AppState->FileOpen))
+ {
+ f_close(&AppState->FileToSend);
+ uip_close();
+ AppState->CurrentState = WEBSERVER_STATE_Closed;
+ break;
+ }
+
+ uint16_t MaxSegSize = uip_mss();
+
+ /* Read the next chunk of data from the open file */
+ f_read(&AppState->FileToSend, AppData, MaxSegSize, &AppDataSize);
+ AppState->FileOpen = (MaxSegSize == AppDataSize);
+
+ /* If data was read, send it to the client */
+ if (AppDataSize)
+ uip_send(AppData, AppDataSize);
+
+ break;
+ }
+}
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