/*** GCMD::ACTION ComposeHTMLSDPage(CLIENTINFO * pClientInfo)
*
* Parameters:
* pClientInfo - the client info representing this connection and web page
*
* Return Values:
* GCMD::ACTION - GCMD::CONTINUE, just return with no outside action
* - GCMD::READ, non-blocking read of input data into the rgbIn buffer appended to the end of cbRead
* - GCMD::GETLINE, blocking read until a line of input is read or until the rgbIn buffer is full, always the line starts at the beginnig of the rgbIn
* - GCMD::WRITE, loop writing until all cbWrite bytes are written from the pbOut buffer
* - GCMD::DONE, we are done processing and the connection can be closed
*
* Description:
*
* This renders a page off of the SD filesystem. Pages of type
* .htm, .html, .jpeg, .png, .txt and more may be rendered
* The file extension on the filename determine the MIME type
* returned to the client.
*
* ------------------------------------------------------------ */
GCMD::ACTION ComposeHTMLSDPage(CLIENTINFO * pClientInfo)
{
char * pFileNameEnd = NULL;
GCMD::ACTION retCMD = GCMD::CONTINUE;
switch(pClientInfo->htmlState)
{
case HTTPSTART:
if(pClientMutex != NULL || (sdLockId = lockSD()) == SDUNLOCKED)
{
break;
}
pClientMutex = pClientInfo;
Serial.println("Read an HTML page off of the SD card");
Serial.print("Entering Client ID: 0x");
Serial.println((uint32_t) pClientMutex, HEX);
pClientInfo->htmlState = PARSEFILENAME;
retCMD = GCMD::GETLINE;
break;
case PARSEFILENAME:
// the assumption is that the file name will be on the first line of the command
// there is a bunch of other stuff on the line we don't care about, but it is at the
// end of the line.
Serial.println((char *) pClientInfo->rgbIn);
// find the begining of the file name
szFileName = strstr((const char *) pClientInfo->rgbIn, szGET);
if(szFileName == NULL)
{
pClientInfo->htmlState = JMPFILENOTFOUND;
break;
}
szFileName += sizeof(szGET) - 1;
// find the end of the file name
pFileNameEnd = strstr(szFileName, szEndOfURL);
if(pFileNameEnd == NULL)
{
pClientInfo->htmlState = JMPFILENOTFOUND;
break;
}
else if(pFileNameEnd == szFileName)
{
szFileName = szDefaultPage;
}
else
{
*pFileNameEnd = '\0';
}
Serial.print("SD FileName:");
Serial.println(szFileName);
if(dFile.fsopen(szFileName, FA_READ) == FR_OK)
{
Serial.print("HTML page:");
Serial.print(szFileName);
Serial.println(" exists!");
pClientInfo->htmlState = BUILDHTTP;
}
else
{
Serial.print("Unable to find HTML page:");
Serial.println(szFileName);
pClientInfo->htmlState = JMPFILENOTFOUND;
}
break;
// We need to build the HTTP directive
case BUILDHTTP:
if(dFile && (dFile.fslseek(0) == FR_OK))
{
pClientInfo->cbWrite = BuildHTTPOKStr(false, dFile.fssize(), szFileName, (char *) pClientInfo->rgbOut, sizeof(pClientInfo->rgbOut));
if(pClientInfo->cbWrite > 0)
{
pClientInfo->pbOut = pClientInfo->rgbOut;
retCMD = GCMD::WRITE;
pClientInfo->htmlState = SENDFILE;
cbSent = 0;
tStart = millis();
Serial.print("Writing file:");
Serial.println(szFileName);
}
else
{
Serial.print("Unable to build HTTP directive for file:");
Serial.println(szFileName);
pClientInfo->htmlState = JMPFILENOTFOUND;
}
}
else
{
Serial.print("Unable to open HTML page:");
Serial.println(szFileName);
pClientInfo->htmlState = JMPFILENOTFOUND;
}
break;
// Send the file
case SENDFILE:
{
uint32_t cbT = 0;
if((cbT = SDRead(dFile, pClientInfo->rgbOut, sizeof(pClientInfo->rgbOut))) > 0)
{
cbSent += cbT;
pClientInfo->pbOut = pClientInfo->rgbOut;
pClientInfo->cbWrite = cbT;
tStart = millis();
retCMD = GCMD::WRITE;
}
else if(cbSent == dFile.fssize())
{
pClientInfo->htmlState = EXIT;
}
else if((millis() - tStart) > SDREADTIMEOUT)
{
pClientInfo->htmlState = HTTPTIMEOUT;
}
}
break;
case EXIT:
Serial.println("Wrote page cleanly");
pClientInfo->htmlState = HTTPDISCONNECT;
break;
case JMPFILENOTFOUND:
Serial.println("Jumping to HTTP File Not Found page");
if(isMySD(sdLockId))
{
if(dFile)
{
dFile.fsclose();
}
sdLockId = unlockSD(sdLockId);
}
pClientMutex = NULL;
return(JumpToComposeHTMLPage(pClientInfo, ComposeHTTP404Error));
break;
case HTTPTIMEOUT:
Serial.println("Timeout error occured, closing the session");
// fall thru to close
case HTTPDISCONNECT:
if(pClientMutex == pClientInfo)
{
Serial.print("Closing Client ID: 0x");
Serial.println((uint32_t) pClientMutex, HEX);
if(isMySD(sdLockId))
{
if(dFile)
{
dFile.fsclose();
}
sdLockId = unlockSD(sdLockId);
}
pClientMutex = NULL;
}
// fall thru Done
case DONE:
default:
pClientInfo->cbWrite = 0;
retCMD = GCMD::DONE;
break;
}
return(retCMD);
}
/*** GCMD::ACTION ComposeHTMLGetIO(CLIENTINFO * pClientInfo)
*
* Parameters:
* pClientInfo - the client info representing this connection and web page
*
* Return Values:
* GCMD::ACTION - GCMD::CONTINUE, just return with no outside action
* - GCMD::READ, non-blocking read of input data into the rgbIn buffer appended to the end of cbRead
* - GCMD::GETLINE, blocking read until a line of input is read or until the rgbIn buffer is full, always the line starts at the beginnig of the rgbIn
* - GCMD::WRITE, loop writing until all cbWrite bytes are written from the pbOut buffer
* - GCMD::DONE, we are done processing and the connection can be closed
*
* Description:
*
* This renders a page of the LEDs, BTNs, or SWTs on the device
* It reads a template page from the SD card, puts it into a temp
* RAM buffer, and then updates the template with acutal values
* ------------------------------------------------------------ */
GCMD::ACTION ComposeHTMLGetIO(CLIENTINFO * pClientInfo)
{
char * pFileNameEnd = NULL;
GCMD::ACTION retCMD = GCMD::CONTINUE;
switch(pClientInfo->htmlState)
{
case HTTPSTART:
// serialize so we only do this page once at a time
// this protects the szPageBuffer
if(pClientMutex != NULL)
{
break;
}
pClientMutex = pClientInfo;
Serial.println("Get IO Page Detected");
Serial.print("Entering Client ID: 0x");
Serial.println((uint32_t) pClientMutex, HEX);
pClientInfo->htmlState = READTEMPLATE;
break;
// Read the template htm
case READTEMPLATE:
// We want to serialize usage to the SD card
if((sdLockId = lockSD()) == SDUNLOCKED)
{
break;
}
// open the templeate file
if((fileSD = SD.open(szIOPage, FILE_READ)) && fileSD.seek(0) )
{
// because we have the SD file data now, build the HTTP header in the output temp buffer
// we will only use this if all goes well.
// this will be held for 2 states
cbFile = fileSD.size();
pClientInfo->cbWrite = BuildHTTPOKStr(false, cbFile, szIOPage, (char *) pClientInfo->rgbOut, sizeof(pClientInfo->rgbOut));
// since szIOPage is a template .htm, this better always be true!
if( 0 < cbFile && cbFile < sizeof(szPageBuffer) && SDRead(fileSD, (uint8_t *) szPageBuffer, cbFile) == cbFile )
{
// That Read could have takin some time, so lets release and pick up
// on another state
szPageBuffer[cbFile] = '\0';
iReplace = 0;
pchLast = szPageBuffer;
pClientInfo->htmlState = REPLACE;
}
// not good, not expected either
else
{
Serial.print("Unable to build HTTP directive for file:");
Serial.println(szIOPage);
Serial.print("Sizeof ");
Serial.print(szIOPage);
Serial.print(" is ");
Serial.print(cbFile, DEC);
Serial.println(" bytes");
Serial.print("Sizeof page buffer is");
Serial.print(sizeof(szPageBuffer), DEC);
Serial.println(" bytes");
pClientInfo->htmlState = JMPFILENOTFOUND;
}
}
// something is wrong with the SD card; which happens :-(
else
{
Serial.print("Unable to open HTML page:");
Serial.println(szIOPage);
pClientInfo->htmlState = JMPFILENOTFOUND;
}
// no matter what, were are done with the SD Card
fileSD.close();
sdLockId = unlockSD(sdLockId);
break;
case REPLACE:
// do our replacentments one string at a time.
if(iReplace < cReplacementStrings)
{
if((pchLast = strstr(pchLast, szReplaceStr)) == NULL)
{
// oh this is not good, something is wrong with the template file
Serial.print("Unable able to find template replacemnt on index ");
Serial.print(iReplace, DEC);
Serial.print(" in template file ");
Serial.println(szIOPage);
pClientInfo->htmlState = JMPFILENOTFOUND;
}
else
{
bool isOn = digitalRead(rgReplacePins[iReplace]);
if(iReplace < HTTPCIO)
{
if(isOn)
{
memcpy(pchLast, szON, sizeof(szON)-1);
}
else
{
memcpy(pchLast, szOFF, sizeof(szOFF)-1);
}
}
else if((iReplace - HTTPCIO) < HTTPCLED)
{
if(isOn)
{
memcpy(pchLast, szChecked, sizeof(szChecked)-1);
}
else
{
memcpy(pchLast, szUnChecked, sizeof(szUnChecked)-1);
}
}
// do the next replacement string.
iReplace++;
}
}
// time to start writing stuff out, first the HTTP header that has
// been sitting in pClientInfo->rgbOut
else
{
pClientInfo->pbOut = pClientInfo->rgbOut;
retCMD = GCMD::WRITE;
pClientInfo->htmlState = SENDFILE;
}
break;
// Send the file
case SENDFILE:
pClientInfo->cbWrite = cbFile;
pClientInfo->pbOut = (byte *) szPageBuffer;
retCMD = GCMD::WRITE;
pClientInfo->htmlState = EXIT;
break;
case EXIT:
Serial.println("Wrote page cleanly");
pClientInfo->htmlState = HTTPDISCONNECT;
break;
case JMPFILENOTFOUND:
Serial.println("Jumping to HTTP File Not Found page");
pClientMutex = NULL;
return(JumpToComposeHTMLPage(pClientInfo, ComposeHTTP404Error));
break;
case HTTPTIMEOUT:
Serial.println("Timeout error occured, closing the session");
// fall thru to close
case HTTPDISCONNECT:
if(pClientMutex == pClientInfo)
{
Serial.print("Closing Client ID: 0x");
Serial.println((uint32_t) pClientMutex, HEX);
pClientMutex = NULL;
}
// fall thru Done
case DONE:
default:
pClientInfo->cbWrite = 0;
retCMD = GCMD::DONE;
break;
}
return(retCMD);
}
