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| author | Dean Camera <dean@fourwalledcubicle.com> | 2010-01-25 12:10:13 +0000 |
|---|---|---|
| committer | Dean Camera <dean@fourwalledcubicle.com> | 2010-01-25 12:10:13 +0000 |
| commit | 15c408ab8635fe45226abc2c55c9bebfe1ccb6c8 (patch) | |
| tree | 8b2b811f5857fadb9227e7faa64960d1efdf1b28 /Projects/Webserver/Lib/WebserverApp.c | |
| parent | d66f227ccef46a65e17b06d31c82c30158ae36a5 (diff) | |
| download | lufa-15c408ab8635fe45226abc2c55c9bebfe1ccb6c8.tar.gz lufa-15c408ab8635fe45226abc2c55c9bebfe1ccb6c8.tar.bz2 lufa-15c408ab8635fe45226abc2c55c9bebfe1ccb6c8.zip | |
Moved initial completed version of the Webserver project out of the Projects/Incomplete directory.
Diffstat (limited to 'Projects/Webserver/Lib/WebserverApp.c')
| -rw-r--r-- | Projects/Webserver/Lib/WebserverApp.c | 143 |
1 files changed, 143 insertions, 0 deletions
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[] =
+ "<html>"
+ " <head>"
+ " <title>"
+ " LUFA Webserver Demo"
+ " </title>"
+ " </head>"
+ " <body>"
+ " <h1>Hello from your USB AVR!</h1>"
+ " <p>"
+ " 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."
+ " <br /><br />"
+ " <small>Project Information: <a href=\"http://www.fourwalledcubicle.com/LUFA.php\">http://www.fourwalledcubicle.com/LUFA.php</a>.</small>"
+ " <hr />"
+ " <i>LUFA Version: </i>" LUFA_VERSION_STRING
+ " </p>"
+ " </body>"
+ "</html>";
+
+/** 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);
+}
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