Squashed 'lib/lufa/' content from commit 385d40300

git-subtree-dir: lib/lufa
git-subtree-split: 385d4030035dbaf41591309dbde47653bd03841b

1 files changed, 284 insertions, 0 deletions

diff --git a/Projects/Webserver/Lib/HTTPServerApp.c b/Projects/Webserver/Lib/HTTPServerApp.c
new file mode 100644
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+++ b/Projects/Webserver/Lib/HTTPServerApp.c
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+/*
+             LUFA Library
+     Copyright (C) Dean Camera, 2017.
+
+  dean [at] fourwalledcubicle [dot] com
+           www.lufa-lib.org
+*/
+
+/*
+  Copyright 2017  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 disclaims 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 on port 80.
+ */
+
+#define  INCLUDE_FROM_HTTPSERVERAPP_C
+#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.
+ */
+const char PROGMEM HTTP200Header[] = "HTTP/1.1 200 OK\r\n"
+                                     "Server: LUFA " LUFA_VERSION_STRING "\r\n"
+                                     "Connection: close\r\n"
+                                     "MIME-version: 1.0\r\n"
+                                     "Content-Type: ";
+
+/** HTTP server response header, for transmission before a resource not found error. This indicates to the host that the given
+ *  URL is invalid, and gives extra error information.
+ */
+const char PROGMEM HTTP404Header[] = "HTTP/1.1 404 Not Found\r\n"
+                                     "Server: LUFA " LUFA_VERSION_STRING "\r\n"
+                                     "Connection: close\r\n"
+                                     "MIME-version: 1.0\r\n"
+                                     "Content-Type: text/plain\r\n\r\n"
+                                     "Error 404: File Not Found: /";
+
+/** Default filename to fetch when a directory is requested */
+const char PROGMEM DefaultDirFileName[] = "index.htm";
+
+/** Default MIME type sent if no other MIME type can be determined. */
+const char PROGMEM DefaultMIMEType[] = "text/plain";
+
+/** List of MIME types for each supported file extension. */
+const MIME_Type_t MIMETypes[] =
+	{
+		{.Extension = "htm", .MIMEType = "text/html"},
+		{.Extension = "jpg", .MIMEType = "image/jpeg"},
+		{.Extension = "gif", .MIMEType = "image/gif"},
+		{.Extension = "bmp", .MIMEType = "image/bmp"},
+		{.Extension = "png", .MIMEType = "image/png"},
+		{.Extension = "ico", .MIMEType = "image/x-icon"},
+		{.Extension = "exe", .MIMEType = "application/octet-stream"},
+		{.Extension = "gz",  .MIMEType = "application/x-gzip"},
+		{.Extension = "zip", .MIMEType = "application/zip"},
+		{.Extension = "pdf", .MIMEType = "application/pdf"},
+	};
+
+/** FATFs structure to hold the internal state of the FAT driver for the Dataflash contents. */
+FATFS DiskFATState;
+
+
+/** Initialization function for the simple HTTP webserver. */
+void HTTPServerApp_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 HTTPServerApp_Callback(void)
+{
+	uip_tcp_appstate_t* const AppState = &uip_conn->appstate;
+
+	if (uip_aborted() || uip_timedout() || uip_closed())
+	{
+		/* Lock to the closed state so that no further processing will occur on the connection */
+		AppState->HTTPServer.CurrentState  = WEBSERVER_STATE_Closing;
+		AppState->HTTPServer.NextState     = WEBSERVER_STATE_Closing;
+	}
+
+	if (uip_connected())
+	{
+		/* New connection - initialize connection state values */
+		AppState->HTTPServer.CurrentState  = WEBSERVER_STATE_OpenRequestedFile;
+		AppState->HTTPServer.NextState     = WEBSERVER_STATE_OpenRequestedFile;
+		AppState->HTTPServer.FileOpen      = false;
+		AppState->HTTPServer.ACKedFilePos  = 0;
+		AppState->HTTPServer.SentChunkSize = 0;
+	}
+
+	if (uip_acked())
+	{
+		/* Add the amount of ACKed file data to the total sent file bytes counter */
+		AppState->HTTPServer.ACKedFilePos += AppState->HTTPServer.SentChunkSize;
+
+		/* Progress to the next state once the current state's data has been ACKed */
+		AppState->HTTPServer.CurrentState = AppState->HTTPServer.NextState;
+	}
+
+	if (uip_rexmit())
+	{
+		/* Return file pointer to the last ACKed position */
+		f_lseek(&AppState->HTTPServer.FileHandle, AppState->HTTPServer.ACKedFilePos);
+	}
+
+	if (uip_rexmit() || uip_acked() || uip_newdata() || uip_connected() || uip_poll())
+	{
+		switch (AppState->HTTPServer.CurrentState)
+		{
+			case WEBSERVER_STATE_OpenRequestedFile:
+				HTTPServerApp_OpenRequestedFile();
+				break;
+			case WEBSERVER_STATE_SendResponseHeader:
+				HTTPServerApp_SendResponseHeader();
+				break;
+			case WEBSERVER_STATE_SendData:
+				HTTPServerApp_SendData();
+				break;
+			case WEBSERVER_STATE_Closing:
+				/* Connection is being terminated for some reason - close file handle */
+				f_close(&AppState->HTTPServer.FileHandle);
+				AppState->HTTPServer.FileOpen = false;
+
+				/* If connection is not already closed, close it */
+				uip_close();
+
+				AppState->HTTPServer.CurrentState = WEBSERVER_STATE_Closed;
+				AppState->HTTPServer.NextState    = WEBSERVER_STATE_Closed;
+				break;
+		}
+	}
+}
+
+/** HTTP Server State handler for the Request Process state. This state manages the processing of incoming HTTP
+ *  GET requests to the server from the receiving HTTP client.
+ */
+static void HTTPServerApp_OpenRequestedFile(void)
+{
+	uip_tcp_appstate_t* const AppState    = &uip_conn->appstate;
+	char*               const AppData     = (char*)uip_appdata;
+
+	/* No HTTP header received from the client, abort processing */
+	if (!(uip_newdata()))
+	  return;
+
+	char* RequestToken      = strtok(AppData, " ");
+	char* RequestedFileName = strtok(NULL, " ");
+
+	/* Must be a GET request, abort otherwise */
+	if (strcmp_P(RequestToken, PSTR("GET")) != 0)
+	{
+		uip_abort();
+		return;
+	}
+
+	/* Copy over the requested filename */
+	strlcpy(AppState->HTTPServer.FileName, &RequestedFileName[1], sizeof(AppState->HTTPServer.FileName));
+
+	/* Determine the length of the URI so that it can be checked to see if it is a directory */
+	uint8_t FileNameLen = strlen(AppState->HTTPServer.FileName);
+
+	/* If the URI is a directory, append the default filename */
+	if ((AppState->HTTPServer.FileName[FileNameLen - 1] == '/') || !(FileNameLen))
+	{
+		strlcpy_P(&AppState->HTTPServer.FileName[FileNameLen], DefaultDirFileName,
+		          (sizeof(AppState->HTTPServer.FileName) - FileNameLen));
+	}
+
+	/* Try to open the file from the Dataflash disk */
+	AppState->HTTPServer.FileOpen     = (f_open(&AppState->HTTPServer.FileHandle, AppState->HTTPServer.FileName,
+	                                            (FA_OPEN_EXISTING | FA_READ)) == FR_OK);
+
+	/* Lock to the SendResponseHeader state until connection terminated */
+	AppState->HTTPServer.CurrentState = WEBSERVER_STATE_SendResponseHeader;
+	AppState->HTTPServer.NextState    = WEBSERVER_STATE_SendResponseHeader;
+}
+
+/** HTTP Server State handler for the HTTP Response Header Send state. This state manages the transmission of
+ *  the HTTP response header to the receiving HTTP client.
+ */
+static void HTTPServerApp_SendResponseHeader(void)
+{
+	uip_tcp_appstate_t* const AppState    = &uip_conn->appstate;
+	char*               const AppData     = (char*)uip_appdata;
+
+	char* Extension     = strpbrk(AppState->HTTPServer.FileName, ".");
+	bool  FoundMIMEType = false;
+
+	/* If the file isn't already open, it wasn't found - send back a 404 error response and abort */
+	if (!(AppState->HTTPServer.FileOpen))
+	{
+		/* Copy over the HTTP 404 response header and send it to the receiving client */
+		strcpy_P(AppData, HTTP404Header);
+		strcat(AppData, AppState->HTTPServer.FileName);
+		uip_send(AppData, strlen(AppData));
+
+		AppState->HTTPServer.NextState = WEBSERVER_STATE_Closing;
+		return;
+	}
+
+	/* Copy over the HTTP 200 response header and send it to the receiving client */
+	strcpy_P(AppData, HTTP200Header);
+
+	/* Check to see if a MIME type for the requested file's extension was found */
+	if (Extension != NULL)
+	{
+		/* Look through the MIME type list, copy over the required MIME type if found */
+		for (uint8_t i = 0; i < (sizeof(MIMETypes) / sizeof(MIMETypes[0])); i++)
+		{
+			if (strcmp(&Extension[1], MIMETypes[i].Extension) == 0)
+			{
+				strcat(AppData, MIMETypes[i].MIMEType);
+				FoundMIMEType = true;
+				break;
+			}
+		}
+	}
+
+	/* Check if a MIME type was found and copied to the output buffer */
+	if (!(FoundMIMEType))
+	{
+		/* MIME type not found - copy over the default MIME type */
+		strcat_P(AppData, DefaultMIMEType);
+	}
+
+	/* Add the end-of-line terminator and end-of-headers terminator after the MIME type */
+	strcat_P(AppData, PSTR("\r\n\r\n"));
+
+	/* Send the MIME header to the receiving client */
+	uip_send(AppData, strlen(AppData));
+
+	/* When the MIME header is ACKed, progress to the data send stage */
+	AppState->HTTPServer.NextState = WEBSERVER_STATE_SendData;
+}
+
+/** HTTP Server State handler for the Data Send state. This state manages the transmission of file chunks
+ *  to the receiving HTTP client.
+ */
+static void HTTPServerApp_SendData(void)
+{
+	uip_tcp_appstate_t* const AppState    = &uip_conn->appstate;
+	char*               const AppData     = (char*)uip_appdata;
+
+	/* Get the maximum segment size for the current packet */
+	uint16_t MaxChunkSize = uip_mss();
+
+	/* Read the next chunk of data from the open file */
+	f_read(&AppState->HTTPServer.FileHandle, AppData, MaxChunkSize, &AppState->HTTPServer.SentChunkSize);
+
+	/* Send the next file chunk to the receiving client */
+	uip_send(AppData, AppState->HTTPServer.SentChunkSize);
+
+	/* Check if we are at the last chunk of the file, if so next ACK should close the connection */
+	if (MaxChunkSize != AppState->HTTPServer.SentChunkSize)
+	  AppState->HTTPServer.NextState = WEBSERVER_STATE_Closing;
+}
+