add filter to projectstore entries request (#25)

* Add HttpServerRequest::Decode to decode http request parameters
* Add support to filter projectstore `entries` request using the `fieldfilter` where the wanted fields are comma (,) delimited
* Add support for responding with compressed payloads for projectstore `entries` requests by adding AcceptType `compressed-binary` to the request header
* Add support for responding with compressed payloads for projectstore `files` requests by adding AcceptType `compressed-binary` to the request header
* Add support for responding with compressed payloads for projectstore `chunkinfo` requests by adding AcceptType `compressed-binary` to the request header

1 files changed, 34 insertions, 0 deletions

diff --git a/src/zenhttp/httpserver.cpp b/src/zenhttp/httpserver.cpp
index dcbeac907..adb3128bf 100644
--- a/src/zenhttp/httpserver.cpp
+++ b/src/zenhttp/httpserver.cpp
@@ -530,6 +530,40 @@ HttpServerRequest::WriteResponse(HttpResponseCode ResponseCode, HttpContentType
 	WriteResponse(ResponseCode, ContentType, Buffers);
 }
 
+std::string
+HttpServerRequest::Decode(std::string_view PercentEncodedString)
+{
+	size_t		Length = PercentEncodedString.length();
+	std::string Decoded;
+	Decoded.reserve(Length);
+	size_t Offset = 0;
+	while (Offset < Length)
+	{
+		char C = PercentEncodedString[Offset];
+		if (C == '%' && (Offset <= (Length - 3)))
+		{
+			std::string_view CharHash(&PercentEncodedString[Offset + 1], 2);
+			uint8_t			 DecodedChar = 0;
+			if (ParseHexBytes(CharHash, &DecodedChar))
+			{
+				Decoded.push_back((char)DecodedChar);
+				Offset += 3;
+			}
+			else
+			{
+				Decoded.push_back(C);
+				Offset++;
+			}
+		}
+		else
+		{
+			Decoded.push_back(C);
+			Offset++;
+		}
+	}
+	return Decoded;
+}
+
 HttpServerRequest::QueryParams
 HttpServerRequest::GetQueryParams()
 {