diff options
Diffstat (limited to 'lib/lufa/Projects/Webserver/Lib/HTTPServerApp.c')
| -rw-r--r-- | lib/lufa/Projects/Webserver/Lib/HTTPServerApp.c | 284 |
1 files changed, 284 insertions, 0 deletions
diff --git a/lib/lufa/Projects/Webserver/Lib/HTTPServerApp.c b/lib/lufa/Projects/Webserver/Lib/HTTPServerApp.c new file mode 100644 index 000000000..ba5ce8b99 --- /dev/null +++ b/lib/lufa/Projects/Webserver/Lib/HTTPServerApp.c @@ -0,0 +1,284 @@ +/* + 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; +} + |