First commit.

src/HtmlHelper.hpp

@@ -0,0 +1,35 @@
+#pragma once
+
+#include <string>
+
+namespace pipedal {
+
+class HtmlHelper {
+
+public:
+    static std::string timeToHttpDate();
+    static std::string timeToHttpDate(time_t time);
+
+
+    static std::string encode_url_segment(const char*pStart, const char*pEnd, bool isQuerySegment = false);
+    static void encode_url_segment(std::ostream&os, const char*pStart, const char *pEnd, bool isQuerySegment = false);
+    static void encode_url_segment(std::ostream&os, const std::string&segment, bool isQuerySegment = false)
+    {
+        const char*p = segment.c_str();
+        encode_url_segment(os,p, p + segment.length(),isQuerySegment);
+    }
+
+
+    static std::string decode_url_segment(const char*pStart, const char*pEnd, bool isQuerySegment = false);
+
+    static std::string decode_url_segment(const char*text, bool isQuerySegment = false);
+
+    static void utf32_to_utf8_stream(std::ostream &s, uint32_t uc);
+
+    static std::string Rfc5987EncodeFileName(const std::string&name);
+
+    static std::string SafeFileName(const std::string name);
+
+};
+
+} // namespace.