wtf/url/src/URLQueryCanonicalizer.h

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  28
  29
  30 #ifndef URLQueryCanonicalizer_h
  31 #define URLQueryCanonicalizer_h
  32
  33 #include "RawURLBuffer.h"
  34 #include "URLBuffer.h"
  35 #include "URLCharacterTypes.h"
  36 #include "URLComponent.h"
  37 #include "URLEscape.h"
  38
  39 namespace WTF {
  40
  41 template<typename InChar, typename OutChar, void convertCharset(const InChar*, int length, URLBuffer<char>&)>
  42 class URLQueryCanonicalizer {
  43 public:
  44     static void canonicalize(const InChar* spec, const URLComponent& query, URLBuffer<OutChar>& buffer, URLComponent& resultQuery)
  45     {
  46         if (query.length() < 0) {
  47             resultQuery = URLComponent();
  48             return;
  49         }
  50
  51         buffer->append('?');
  52         resultQuery.setBegin(buffer->length());
  53         convertToQueryEncoding(spec, query, buffer);
  54         resultQuery.setLength(buffer->length() - resultQuery.begin());
  55     }
  56
  57 private:
  58     static bool isAllASCII(const InChar* spec, const URLComponent& query)
  59     {
  60         int end = query.end();
  61         for (int i = query.begin(); i < end; ++i) {
  62             if (static_cast<unsigned>(spec[i]) >= 0x80)
  63                 return false;
  64         }
  65         return true;
  66     }
  67
  68 #ifndef NDEBUG
  69     static bool isRaw8Bit(const InChar* source, int length)
  70     {
  71         for (int i = source; i < length; ++i) {
  72             if (source[i] & 0xFF != source[i])
  73                 return false;
  74         }
  75         return true;
  76     }
  77 #endif
  78
  79     static void appendRaw8BitQueryString(const InChar* source, int length, URLBuffer<OutChar>* buffer)
  80     {
  81         ASSERT(isRaw8Bit(source, length));
  82         for (int i = 0; i < length; ++i) {
  83             if (!URLCharacterTypes::isQueryChar(source[i]))
  84                 appendURLEscapedCharacter(static_cast<unsigned char>(source[i]), buffer);
  85             else
  86                 buffer->append(static_cast<char>(source[i]));
  87         }
  88     }
  89
  90     static void convertToQueryEncoding(const InChar* spec, const URLComponent& query, URLBuffer<OutChar>& buffer)
  91     {
  92         if (isAllASCII(spec, query)) {
  93             appendRaw8BitQueryString(&spec[query.begin()], query.length(), buffer);
  94             return;
  95         }
  96
  97         RawURLBuffer<char, 1024> convertedQuery;
  98         convertCharset(spec, query, convertedQuery);
  99         appendRaw8BitQueryString(convertedQuery.data(), convertedQuery.length(), buffer);
 100     }
 101 };
 102
 103 }
 104
 105 #endif
 106
 107