orthanc: Core/Toolbox.cpp comparison

Toolbox::UriEncode

author	Sebastien Jodogne <s.jodogne@gmail.com>
date	Thu, 23 Jun 2016 10:08:27 +0200
parents	08ce34cfacad
children	54417b0831c4

comparison

equal deleted inserted replaced

-:5b93382f88e1
+:35ccba7adae9
 throw OrthancException(ErrorCode_ParameterOutOfRange);
 }
 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');
+}
+}
+}
 }

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