From 15c408ab8635fe45226abc2c55c9bebfe1ccb6c8 Mon Sep 17 00:00:00 2001 From: Dean Camera Date: Mon, 25 Jan 2010 12:10:13 +0000 Subject: Moved initial completed version of the Webserver project out of the Projects/Incomplete directory. --- Projects/Webserver/Lib/WebserverApp.c | 143 ++++++++++++++++++++++++++++++++++ 1 file changed, 143 insertions(+) create mode 100644 Projects/Webserver/Lib/WebserverApp.c (limited to 'Projects/Webserver/Lib/WebserverApp.c') diff --git a/Projects/Webserver/Lib/WebserverApp.c b/Projects/Webserver/Lib/WebserverApp.c new file mode 100644 index 000000000..6ac94d6ac --- /dev/null +++ b/Projects/Webserver/Lib/WebserverApp.c @@ -0,0 +1,143 @@ +/* + 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 "WebserverApp.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"; + +/** HTTP page to serve to the host when a HTTP request is made. This page is too long for a single response, thus it is automatically + * broken up into smaller blocks and sent as a series of packets each time the webserver application callback is run. + */ +char PROGMEM HTTPPage[] = + "" + " " + " " + " LUFA Webserver Demo" + " " + " " + " " + "

Hello from your USB AVR!

" + "

" + " Hello! Welcome to the LUFA RNDIS Demo Webserver test page, running on your USB AVR via the LUFA library and uIP TCP/IP network stack. This" + " demonstrates a simple HTTP webserver serving out pages to HTTP clients." + "

" + " Project Information: http://www.fourwalledcubicle.com/LUFA.php." + "

" + " LUFA Version: " LUFA_VERSION_STRING + "

" + " " + ""; + +/** Initialization function for the simple HTTP webserver. */ +void WebserverApp_Init(void) +{ + /* Listen on port 80 for HTTP connections from hosts */ + uip_listen(HTONS(80)); +} + +/** 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) +{ + char* AppDataPtr = (char*)uip_appdata; + uint16_t AppDataSize = 0; + + if (uip_closed() || uip_aborted() || uip_timedout()) + { + /* Terminated or completed connection - don't send any new data */ + return; + } + else if (uip_connected()) + { + /* New connection - initialize connection state and data pointer to the appropriate HTTP header */ + uip_conn->appstate.SendPos = HTTP200Header; + uip_conn->appstate.CurrentState = WEBSERVER_STATE_SendHeaders; + } + + /* Calculate the maximum segment size and remaining data size */ + uint16_t BytesRemaining = strlen_P(uip_conn->appstate.SendPos); + uint16_t MaxSegSize = uip_mss(); + + /* No more bytes remaining in the current data being sent - progress to next data chunk or + * terminate the connection once all chunks are sent */ + if (!(BytesRemaining)) + { + /* Check which data chunk we are currently sending (header or data) */ + if (uip_conn->appstate.CurrentState == WEBSERVER_STATE_SendHeaders) + { + uip_conn->appstate.SendPos = HTTPPage; + uip_conn->appstate.CurrentState = WEBSERVER_STATE_SendData; + } + else if (uip_conn->appstate.CurrentState == WEBSERVER_STATE_SendData) + { + uip_close(); + uip_conn->appstate.CurrentState = WEBSERVER_STATE_Closed; + } + + return; + } + else if (BytesRemaining > MaxSegSize) + { + /* More bytes remaining to send than the maximum segment size, send next chunk */ + AppDataSize = MaxSegSize; + } + else + { + /* Less bytes than the segment size remaining, send all remaining bytes in the one packet */ + AppDataSize = BytesRemaining; + } + + /* Copy over the next data segment to the application buffer, advance send position pointer */ + strncpy_P(uip_appdata, uip_conn->appstate.SendPos, AppDataSize); + uip_conn->appstate.SendPos += AppDataSize; + + /* Send the data to the requesting host */ + uip_send(AppDataPtr, AppDataSize); +} -- cgit v1.2.3