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/*--------------------------------------------------------------------

 * TITLE: Plasma TCP/IP HTTP Server

 * AUTHOR: Steve Rhoads (rhoadss@yahoo.com)

 * DATE CREATED: 4/22/06

 * FILENAME: http.c

 * PROJECT: Plasma CPU core

 * COPYRIGHT: Software placed into the public domain by the author.

 *    Software 'as is' without warranty.  Author liable for nothing.

 * DESCRIPTION:

 *    Plasma TCP/IP HTTP Server

 *--------------------------------------------------------------------*/

#include "rtos.h"

#include "tcpip.h"

#ifdef WIN32

#define UartPrintf printf

#define OS_MQueueCreate(A,B,C) 0

#define OS_MQueueGet(A,B,C) 0

#define OS_ThreadCreate(A,B,C,D,E) 0

#endif

static const char pageGif[]=

{

   "HTTP/1.0 200 OK\r\n"

   "Content-Length: %d\r\n"

   "Content-Type: binary/gif\r\n\r\n"

};

static const char pageGif2[]=

{

   "HTTP/1.0 200 OK\r\n"

   "Content-Type: binary/gif\r\n\r\n"

};

static const char pageBinary[]=

{

   "HTTP/1.0 200 OK\r\n"

   "Content-Length: %d\r\n"

   "Content-Type: binary/binary\r\n\r\n"

};

static const char pageBinary2[]=

{

   "HTTP/1.0 200 OK\r\n"

   "Content-Type: binary/binary\r\n\r\n"

};

static const char pageHtml[]={

   "HTTP/1.0 200 OK\r\n"

   "Content-Length: %d\r\n"

   "Content-Type: text/html\r\n\r\n"

};

static const char pageHtml2[]={

   "HTTP/1.0 200 OK\r\n"

   "Content-Type: text/html\r\n\r\n"

};

static const char pageText[]={

   "HTTP/1.0 200 OK\r\n"

   "Content-Length: %d\r\n"

   "Content-Type: text/text\r\n\r\n"

};

static const char pageEmpty[]=

{

   "HTTP/1.0 404 OK\r\n"

   "Content-Length: 0\r\n"

   "Content-Type: text/html\r\n\r\n"

};

static const PageEntry_t *HtmlPages;

static int HtmlFiles;

void HttpServer(IPSocket *socket)

{

   uint8 buf[600];

   char filename[80];

   int bytes, i, length, len, needFooter;

   char *name=NULL, *page=NULL;

   const char *header, *header2;

   if(socket == NULL)

      return;

   if(socket->funcPtr != HttpServer && socket->funcPtr)

   {

      socket->funcPtr(socket);

      return;

   }

   socket->dontFlush = 2;

   bytes = IPRead(socket, buf, sizeof(buf)-1);

   if(bytes)

   {

      buf[bytes] = 0;

      if(strncmp((char*)buf, "GET /", 5) == 0)

      {

         for(i = 0; ; ++i)

         {

            length = HtmlPages[i].length;

            if(length == -1)

               break;

            name = (char*)HtmlPages[i].name;

            page = (char*)HtmlPages[i].page;

            len = (int)strlen(name);

            if(strncmp((char*)buf+4, name, len) == 0)

               break;

         }

#ifndef EXCLUDE_FILESYS

         if(length == HTML_LENGTH_LIST_END && HtmlFiles)

         {

            FILE *file;

            char *ptr;

            name = (char*)buf + 5;

            ptr = strstr(name, " ");

            if(ptr)

               *ptr = 0;

            strcpy(filename, "/web/");

            strncat(filename, name, 60);

            file = fopen(filename, "rb");

            if(file == NULL)

            {

               strcpy(filename, "/flash/web/");

               strncat(filename, name, 60);

               file = fopen(filename, "rb");

            }

            if(file)

            {

               if(strstr(name, ".htm"))

                  IPWrite(socket, (uint8*)pageHtml2, sizeof(pageHtml2)-1);

               else if(strstr(name, ".gif"))

                  IPWrite(socket, (uint8*)pageGif2, sizeof(pageGif2)-1);

               else

                  IPWrite(socket, (uint8*)pageBinary2, sizeof(pageBinary2)-1);

               for(;;)

               {

                  len = fread(buf, 1, sizeof(buf), file);

                  if(len == 0)

                     break;

                  IPWrite(socket, (uint8*)buf, len);

               }

               fclose(file);

               IPWriteFlush(socket);

               IPClose(socket);

               return;

            }

         }

#endif //!EXCLUDE_FILESYS

         if(length != HTML_LENGTH_LIST_END)

         {

            if(length == HTML_LENGTH_CALLBACK)

            {

               IPCallbackPtr funcPtr = (IPCallbackPtr)(uint32)page;

               funcPtr(socket, buf, bytes);

               return;

            }

            if(length == 0)

               length = (int)strlen(page);

            needFooter = 0;

            header2 = NULL;

            if(strstr(name, ".html"))

               header = pageHtml;

            else if(strstr(name, ".htm") || strcmp(name, "/ ") == 0)

            {

               header = pageHtml;

               header2 = HtmlPages[0].page;

               needFooter = 1;

            }

            else if(strstr(HtmlPages[i].name, ".gif"))

               header = pageGif;

            else

               header = pageBinary;

            len = 0;

            if(header2)

               len += (int)strlen(header2) + (int)strlen(HtmlPages[1].page);

            sprintf((char*)buf, header, length + len);

            IPWrite(socket, buf, (int)strlen((char*)buf));

            if(header2)

               IPWrite(socket, (uint8*)header2, (int)strlen(header2));

            IPWrite(socket, (uint8*)page, length);

            if(needFooter)

               IPWrite(socket, (uint8*)HtmlPages[1].page, (int)strlen(HtmlPages[1].page));

         }

         else

         {

            IPWrite(socket, (uint8*)pageEmpty, (int)strlen(pageEmpty));

         }

         IPClose(socket);

      }

   }

}

void HttpInit(const PageEntry_t *Pages, int UseFiles)

{

   HtmlPages = Pages;

   HtmlFiles = UseFiles;

   IPOpen(IP_MODE_TCP, 0, 80, HttpServer);

   IPOpen(IP_MODE_TCP, 0, 8080, HttpServer);

}

#ifdef EXAMPLE_HTML

//Example test code

static void MyProg(IPSocket *socket, char *request, int bytes)

{

   char *text="HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n"

              "<html><body>Hello World!</body></html>";

   (void)request; (void)bytes;

   IPWrite(socket, (uint8*)text, (int)strlen(text));

   IPClose(socket);

}

static const PageEntry_t pageEntry[]=

{  //name, length, htmlText

   {"/Header", 0, "<HTML><HEAD><TITLE>Plasma CPU</TITLE></HEAD>\n<BODY>"},

   {"/Footer", 0, "</BODY></HTML>"},

   {"/ ", 0, "<h2>Home Page</h2>Welcome!  <a href='/other.htm'>Other</a>"

             " <a href='/cgi/myprog'>myprog</a>"},

   {"/other.htm ", 0, "<h2>Other</h2>Other."},

   //{"/binary/plasma.gif ", 1945, PlasmaGif},

   {"/cgi/myprog", HTML_LENGTH_CALLBACK, (char*)(int)MyProg},

   {"", HTML_LENGTH_LIST_END, NULL}

};

void HtmlInit(int UseFiles)

{

   (void)UseFiles;

   HttpInit(pageEntry, 1);

}

#endif