C++ OutputBuffer::EncodeString方法代码示例

// Get the list of files in the specified directory in JSON format.
// If flagDirs is true then we prefix each directory with a * character.
OutputBuffer *RepRap::GetFilesResponse(const char *dir, bool flagsDirs)
{
	// Need something to write to...
	OutputBuffer *response;
	if (!OutputBuffer::Allocate(response))
	{
		return nullptr;
	}

	response->copy("{\"dir\":");
	response->EncodeString(dir, strlen(dir), false);
	response->cat(",\"files\":[");

	FileInfo fileInfo;
	bool firstFile = true;
	bool gotFile = platform->GetMassStorage()->FindFirst(dir, fileInfo);
	size_t bytesLeft = OutputBuffer::GetBytesLeft(response);	// don't write more bytes than we can
	char filename[FILENAME_LENGTH];
	filename[0] = '*';
	const char *fname;

	while (gotFile)
	{
		if (fileInfo.fileName[0] != '.')			// ignore Mac resource files and Linux hidden files
		{
			// Get the long filename if possible
			if (flagsDirs && fileInfo.isDirectory)
			{
				strncpy(filename + sizeof(char), fileInfo.fileName, FILENAME_LENGTH - 1);
				filename[FILENAME_LENGTH - 1] = 0;
				fname = filename;
			}
			else
			{
				fname = fileInfo.fileName;
			}

			// Make sure we can end this response properly
			if (bytesLeft < strlen(fname) * 2 + 4)
			{
				// No more space available - stop here
				break;
			}

			// Write separator and filename
			if (!firstFile)
			{
				bytesLeft -= response->cat(',');
			}
			bytesLeft -= response->EncodeString(fname, FILENAME_LENGTH, false);

			firstFile = false;
		}
		gotFile = platform->GetMassStorage()->FindNext(fileInfo);
	}
	response->cat("]}");

	return response;
}

//.........这里部分代码省略.........
				response->catf("%c%.3f", ch, liveCoordinates[axis]);
				ch = ',';
			}
		}
	}

	// Current tool number
	const int toolNumber = (currentTool == nullptr) ? -1 : currentTool->Number();
	response->catf("]},\"currentTool\":%d", toolNumber);

	// Output - only reported once
	{
		bool sendBeep = (beepDuration != 0 && beepFrequency != 0);
		bool sendMessage = (message[0] != 0);
		if (sendBeep || sendMessage)
		{
			response->cat(",\"output\":{");

			// Report beep values
			if (sendBeep)
			{
				response->catf("\"beepDuration\":%d,\"beepFrequency\":%d", beepDuration, beepFrequency);
				if (sendMessage)
				{
					response->cat(",");
				}
				beepFrequency = beepDuration = 0;
			}

			// Report message
			if (sendMessage)
			{
				response->cat("\"message\":");
				response->EncodeString(message, ARRAY_SIZE(message), false);
				message[0] = 0;
			}
			response->cat("}");
		}
	}

	// Parameters
	{
		// ATX power
		response->catf(",\"params\":{\"atxPower\":%d", platform->AtxPower() ? 1 : 0);

		// Cooling fan value
		response->cat(",\"fanPercent\":");
		ch = '[';
		for(size_t i = 0; i < NUM_FANS; i++)
		{
			response->catf("%c%.2f", ch, platform->GetFanValue(i) * 100.0);
			ch = ',';
		}

		// Speed and Extrusion factors
		response->catf("],\"speedFactor\":%.2f,\"extrFactors\":", gCodes->GetSpeedFactor() * 100.0);
		ch = '[';
		for (size_t extruder = 0; extruder < GetExtrudersInUse(); extruder++)
		{
			response->catf("%c%.2f", ch, gCodes->GetExtrusionFactor(extruder) * 100.0);
			ch = ',';
		}
		response->cat((ch == '[') ? "[]" : "]");
		response->catf(",\"babystep\":%.03f}", gCodes->GetBabyStepOffset());
	}

// Get a JSON-style filelist including file types and sizes
OutputBuffer *RepRap::GetFilelistResponse(const char *dir)
{
	// Need something to write to...
	OutputBuffer *response;
	if (!OutputBuffer::Allocate(response))
	{
		return nullptr;
	}

	// If the requested volume is not mounted, report an error
	if (!platform->GetMassStorage()->CheckDriveMounted(dir))
	{
		response->copy("{\"err\":1}");
		return response;
	}

	// Check if the directory exists
	if (!platform->GetMassStorage()->DirectoryExists(dir))
	{
		response->copy("{\"err\":2}");
		return response;
	}

	response->copy("{\"dir\":");
	response->EncodeString(dir, strlen(dir), false);
	response->cat(",\"files\":[");

	FileInfo fileInfo;
	bool firstFile = true;
	bool gotFile = platform->GetMassStorage()->FindFirst(dir, fileInfo);
	size_t bytesLeft = OutputBuffer::GetBytesLeft(response);	// don't write more bytes than we can

	while (gotFile)
	{
		if (fileInfo.fileName[0] != '.')			// ignore Mac resource files and Linux hidden files
		{
			// Make sure we can end this response properly
			if (bytesLeft < strlen(fileInfo.fileName) + 70)
			{
				// No more space available - stop here
				break;
			}

			// Write delimiter
			if (!firstFile)
			{
				bytesLeft -= response->cat(',');
			}
			firstFile = false;

			// Write another file entry
			bytesLeft -= response->catf("{\"type\":\"%c\",\"name\":", fileInfo.isDirectory ? 'd' : 'f');
			bytesLeft -= response->EncodeString(fileInfo.fileName, FILENAME_LENGTH, false);
			bytesLeft -= response->catf(",\"size\":%u", fileInfo.size);

			const struct tm * const timeInfo = gmtime(&fileInfo.lastModified);
			if (timeInfo->tm_year <= /*19*/80)
			{
				// Don't send the last modified date if it is invalid
				bytesLeft -= response->cat('}');
			}
			else
			{
				bytesLeft -= response->catf(",\"date\":\"%04u-%02u-%02uT%02u:%02u:%02u\"}",
						timeInfo->tm_year + 1900, timeInfo->tm_mon + 1, timeInfo->tm_mday,
						timeInfo->tm_hour, timeInfo->tm_min, timeInfo->tm_sec);
			}
		}
		gotFile = platform->GetMassStorage()->FindNext(fileInfo);
	}
	response->cat("]}");

	return response;
}

//.........这里部分代码省略.........
			}
		}
	}

	// Current tool number
	int toolNumber = (currentTool == nullptr) ? -1 : currentTool->Number();
	response->catf("]},\"currentTool\":%d", toolNumber);

	/* Output - only reported once */
	{
		bool sendBeep = (beepDuration != 0 && beepFrequency != 0);
		bool sendMessage = (message[0] != 0);
		bool sourceRight = (gCodes->HaveAux() && source == ResponseSource::AUX) || (!gCodes->HaveAux() && source == ResponseSource::HTTP);
		if ((sendBeep || message[0] != 0) && sourceRight)
		{
			response->cat(",\"output\":{");

			// Report beep values
			if (sendBeep)
			{
				response->catf("\"beepDuration\":%d,\"beepFrequency\":%d", beepDuration, beepFrequency);
				if (sendMessage)
				{
					response->cat(",");
				}

				beepFrequency = beepDuration = 0;
			}

			// Report message
			if (sendMessage)
			{
				response->cat("\"message\":");
				response->EncodeString(message, ARRAY_SIZE(message), false);
				message[0] = 0;
			}
			response->cat("}");
		}
	}

	/* Parameters */
	{
		// ATX power
		response->catf(",\"params\":{\"atxPower\":%d", platform->AtxPower() ? 1 : 0);

		// Cooling fan value
		response->cat(",\"fanPercent\":[");
		for(size_t i = 0; i < NUM_FANS; i++)
		{
			if (i == NUM_FANS - 1)
			{
				response->catf("%.2f", platform->GetFanValue(i) * 100.0);
			}
			else
			{
				response->catf("%.2f,", platform->GetFanValue(i) * 100.0);
			}
		}

		// Speed and Extrusion factors
		response->catf("],\"speedFactor\":%.2f,\"extrFactors\":", gCodes->GetSpeedFactor() * 100.0);
		ch = '[';
		for (size_t extruder = 0; extruder < GetExtrudersInUse(); extruder++)
		{
			response->catf("%c%.2f", ch, gCodes->GetExtrusionFactor(extruder) * 100.0);
			ch = ',';