Mercurial > hg > orthanc
diff Core/Toolbox.cpp @ 2043:35ccba7adae9
Toolbox::UriEncode
author | Sebastien Jodogne <s.jodogne@gmail.com> |
---|---|
date | Thu, 23 Jun 2016 10:08:27 +0200 |
parents | 08ce34cfacad |
children | 54417b0831c4 |
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--- a/Core/Toolbox.cpp Wed Jun 22 15:31:07 2016 +0200 +++ b/Core/Toolbox.cpp Thu Jun 23 10:08:27 2016 +0200 @@ -1506,4 +1506,63 @@ return fopen(path.c_str(), m); } + + + + static bool IsUnreservedCharacter(char c) + { + // This function checks whether "c" is an unserved character + // wrt. an URI percent-encoding + // https://en.wikipedia.org/wiki/Percent-encoding#Percent-encoding%5Fin%5Fa%5FURI + + return ((c >= 'A' && c <= 'Z') || + (c >= 'a' && c <= 'z') || + (c >= '0' && c <= '9') || + c == '-' || + c == '_' || + c == '.' || + c == '~'); + } + + void Toolbox::UriEncode(std::string& target, + const std::string& source) + { + // Estimate the length of the percent-encoded URI + size_t length = 0; + + for (size_t i = 0; i < source.size(); i++) + { + if (IsUnreservedCharacter(source[i])) + { + length += 1; + } + else + { + // This character must be percent-encoded + length += 3; + } + } + + target.clear(); + target.reserve(length); + + for (size_t i = 0; i < source.size(); i++) + { + if (IsUnreservedCharacter(source[i])) + { + target.push_back(source[i]); + } + else + { + // This character must be percent-encoded + uint8_t byte = static_cast<uint8_t>(source[i]); + uint8_t a = byte >> 4; + uint8_t b = byte & 0x0f; + + target.push_back('%'); + target.push_back(a < 10 ? a + '0' : a - 10 + 'A'); + target.push_back(b < 10 ? b + '0' : b - 10 + 'A'); + } + } + } }