285 lines
10 KiB
C
285 lines
10 KiB
C
/*
|
|
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;
|
|
}
|
|
|