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237 lines
8.0 KiB
237 lines
8.0 KiB
/*
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LUFA Library
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Copyright (C) Dean Camera, 2010.
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dean [at] fourwalledcubicle [dot] com
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www.fourwalledcubicle.com
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*/
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/*
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Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com)
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Permission to use, copy, modify, distribute, and sell this
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software and its documentation for any purpose is hereby granted
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without fee, provided that the above copyright notice appear in
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all copies and that both that the copyright notice and this
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permission notice and warranty disclaimer appear in supporting
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documentation, and that the name of the author not be used in
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advertising or publicity pertaining to distribution of the
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software without specific, written prior permission.
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The author disclaim all warranties with regard to this
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software, including all implied warranties of merchantability
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and fitness. In no event shall the author be liable for any
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special, indirect or consequential damages or any damages
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whatsoever resulting from loss of use, data or profits, whether
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in an action of contract, negligence or other tortious action,
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arising out of or in connection with the use or performance of
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this software.
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*/
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/** \file
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*
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* Simple HTTP Webserver Application. When connected to the uIP stack,
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* this will serve out files to HTTP clients.
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*/
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#include "HTTPServerApp.h"
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/** HTTP server response header, for transmission before the page contents. This indicates to the host that a page exists at the
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* given location, and gives extra connection information.
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*/
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char PROGMEM HTTP200Header[] = "HTTP/1.1 200 OK\r\n"
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"Server: LUFA RNDIS\r\n"
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"Connection: close\r\n"
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"MIME-version: 1.0\r\n"
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"Content-Type: ";
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/** HTTP server response header, for transmission before a resource not found error. This indicates to the host that the given
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* given URL is invalid, and gives extra error information.
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*/
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char PROGMEM HTTP404Header[] = "HTTP/1.1 404 Not Found\r\n"
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"Server: LUFA RNDIS\r\n"
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"Connection: close\r\n"
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"MIME-version: 1.0\r\n"
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"Content-Type: text/plain\r\n\r\n"
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"Error 404: File Not Found";
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/** Default MIME type sent if no other MIME type can be determined */
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char PROGMEM DefaultMIMEType[] = "text/plain";
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/** List of MIME types for each supported file extension - must be terminated with \ref END_OF_MIME_LIST entry. */
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MIME_Type_t PROGMEM MIMETypes[] =
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{
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{.Extension = "htm", .MIMEType = "text/html"},
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{.Extension = "jpg", .MIMEType = "image/jpeg"},
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{.Extension = "gif", .MIMEType = "image/gif"},
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{.Extension = "bmp", .MIMEType = "image/bmp"},
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{.Extension = "png", .MIMEType = "image/png"},
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{.Extension = "exe", .MIMEType = "application/octet-stream"},
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{.Extension = "gz", .MIMEType = "application/x-gzip"},
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{.Extension = "ico", .MIMEType = "image/x-icon"},
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{.Extension = "zip", .MIMEType = "application/zip"},
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{.Extension = "pdf", .MIMEType = "application/pdf"},
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};
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/** FAT Fs structure to hold the internal state of the FAT driver for the dataflash contents. */
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FATFS DiskFATState;
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/** Initialization function for the simple HTTP webserver. */
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void WebserverApp_Init(void)
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{
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/* Listen on port 80 for HTTP connections from hosts */
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uip_listen(HTONS(HTTP_SERVER_PORT));
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/* Mount the dataflash disk via FatFS */
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f_mount(0, &DiskFATState);
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}
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/** uIP stack application callback for the simple HTTP webserver. This function must be called each time the
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* TCP/IP stack needs a TCP packet to be processed.
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*/
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void WebserverApp_Callback(void)
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{
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uip_tcp_appstate_t* const AppState = &uip_conn->appstate;
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char* AppData = (char*)uip_appdata;
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uint16_t AppDataSize = 0;
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if (uip_aborted() || uip_timedout())
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{
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/* Close the file before terminating, if it is open */
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f_close(&AppState->FileToSend);
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AppState->CurrentState = WEBSERVER_STATE_Closed;
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return;
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}
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else if (uip_closed())
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{
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AppState->CurrentState = WEBSERVER_STATE_Closed;
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return;
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}
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else if (uip_connected())
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{
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/* New connection - initialize connection state and data pointer to the appropriate HTTP header */
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AppState->CurrentState = WEBSERVER_STATE_OpenRequestedFile;
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}
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switch (AppState->CurrentState)
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{
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case WEBSERVER_STATE_OpenRequestedFile:
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/* Wait for the packet containing the request header */
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if (uip_datalen())
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{
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/* Must be a GET request, abort otherwise */
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if (strncmp(AppData, "GET ", (sizeof("GET ") - 1)) != 0)
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{
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uip_abort();
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break;
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}
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/* Copy over the requested filename from the GET request as all-lowercase */
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for (uint8_t i = 0; i < (sizeof(AppState->FileName) - 1); i++)
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{
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AppState->FileName[i] = tolower(AppData[sizeof("GET ") + i]);
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if (AppState->FileName[i] == ' ')
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{
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AppState->FileName[i] = 0x00;
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break;
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}
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}
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/* Ensure requested filename is null-terminated */
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AppState->FileName[(sizeof(AppState->FileName) - 1)] = 0x00;
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/* If no filename specified, assume the default of index.htm */
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if (AppState->FileName[0] == 0x00)
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strcpy(AppState->FileName, "index.htm");
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/* Try to open the file from the Dataflash disk */
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AppState->FileOpen = (f_open(&AppState->FileToSend, AppState->FileName, FA_OPEN_EXISTING | FA_READ) == FR_OK);
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AppState->CurrentState = WEBSERVER_STATE_SendResponseHeader;
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}
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break;
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case WEBSERVER_STATE_SendResponseHeader:
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/* Determine what HTTP header should be sent to the client */
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if (AppState->FileOpen)
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{
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AppDataSize = strlen_P(HTTP200Header);
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strncpy_P(AppData, HTTP200Header, AppDataSize);
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}
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else
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{
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AppDataSize = strlen_P(HTTP404Header);
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strncpy_P(AppData, HTTP404Header, AppDataSize);
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}
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uip_send(AppData, AppDataSize);
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AppState->CurrentState = WEBSERVER_STATE_SendMIMETypeHeader;
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break;
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case WEBSERVER_STATE_SendMIMETypeHeader:
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/* File must have been found and opened for MIME header to be sent */
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if (AppState->FileOpen)
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{
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char* Extension = strpbrk(AppState->FileName, ".");
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/* Check to see if a file extension was found for the requested filename */
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if (Extension != NULL)
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{
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/* Look through the MIME type list, copy over the required MIME type if found */
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for (int i = 0; i < (sizeof(MIMETypes) / sizeof(MIMETypes[0])); i++)
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{
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if (strcmp_P(&Extension[1], MIMETypes[i].Extension) == 0)
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{
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AppDataSize = strlen_P(MIMETypes[i].MIMEType);
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strncpy_P(AppData, MIMETypes[i].MIMEType, AppDataSize);
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break;
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}
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}
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}
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/* Check if a MIME type was found and copied to the output buffer */
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if (!(AppDataSize))
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{
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/* MIME type not found - copy over the default MIME type */
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AppDataSize = strlen_P(DefaultMIMEType);
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strncpy_P(AppData, DefaultMIMEType, AppDataSize);
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}
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/* Add the end-of line terminator and end-of-headers terminator after the MIME type */
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strncpy(&AppData[AppDataSize], "\r\n\r\n", sizeof("\r\n\r\n"));
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AppDataSize += (sizeof("\r\n\r\n") - 1);
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uip_send(AppData, AppDataSize);
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}
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AppState->CurrentState = WEBSERVER_STATE_SendData;
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break;
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case WEBSERVER_STATE_SendData:
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/* If end of file/file not open, progress to the close state */
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if (!(AppState->FileOpen))
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{
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f_close(&AppState->FileToSend);
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uip_close();
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AppState->CurrentState = WEBSERVER_STATE_Closed;
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break;
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}
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uint16_t MaxSegSize = uip_mss();
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/* Read the next chunk of data from the open file */
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f_read(&AppState->FileToSend, AppData, MaxSegSize, &AppDataSize);
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AppState->FileOpen = (MaxSegSize == AppDataSize);
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/* If data was read, send it to the client */
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if (AppDataSize)
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uip_send(AppData, AppDataSize);
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break;
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}
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}
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