Method getNextStream

Sming/Components/Network/src/Data/Stream/MultipartStream.cpp:17–64

#include <esp_system.h>

IDataSourceStream* MultipartStream::getNextStream()
{
	if(footerSent) {
		return nullptr;
	}

	// Return content, if available
	if(bodyPart.stream != nullptr) {
		auto stream = bodyPart.stream;
		bodyPart.stream = nullptr;
		return stream;
	}

	// Fetch next part to send
	bodyPart = producer();

	// Generate header fragment
	auto stream = new MemoryDataStream();
	stream->ensureCapacity(4 + 16 + 4);
	stream->print("\r\n");
	stream->print("--");
	stream->print(getBoundary());
	if(!bodyPart) {
		stream->print("--");
		footerSent = true;
	}
	stream->print("\r\n");

	if(bodyPart) {
		if(bodyPart.stream != nullptr && !bodyPart.headers->contains(HTTP_HEADER_CONTENT_LENGTH)) {
			auto avail = bodyPart.stream->available();
			if(avail >= 0) {
				(*bodyPart.headers)[HTTP_HEADER_CONTENT_LENGTH] = avail;
			}
		}

		for(unsigned i = 0; i < bodyPart.headers->count(); i++) {
			stream->print((*bodyPart.headers)[i]);
		}

		delete bodyPart.headers;
		bodyPart.headers = nullptr;

		stream->print("\r\n");
	}

	return stream;
}

const char* MultipartStream::getBoundary()
{