src/third_party/WebKit/Source/WTF/wtf/url/src/URLCanonPathurl.cpp

/*
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// Functions for canonicalizing "path" URLs. Not to be confused with the path
// of a URL, these are URLs that have no authority section, only a path. For
// example, "javascript:" and "data:".

#include "config.h"
#include "URLCanon.h"

#include "RawURLBuffer.h"
#include "URLCanonInternal.h"

#if USE(WTFURL)

namespace WTF {

namespace URLCanonicalizer {

namespace {

template<typename CharacterType, typename UCHAR>
bool doCanonicalizePathURL(const URLComponentSource<CharacterType>& source, const URLSegments& parsed, URLBuffer<char>& output, URLSegments& ouputParsed)
{
    // Scheme: this will append the colon.
    bool success = canonicalizeScheme(source.scheme, parsed.scheme, output, ouputParsed.scheme);

    // We assume there's no authority for path URLs. Note that hosts should never
    // have -1 length.
    ouputParsed.username.reset();
    ouputParsed.password.reset();
    ouputParsed.host.reset();
    ouputParsed.port.reset();

    if (parsed.path.isValid()) {
        // Copy the path using path URL's more lax escaping rules (think for
        // javascript:). We convert to UTF-8 and escape non-ASCII, but leave all
        // ASCII characters alone. This helps readability of JavaStript.
        ouputParsed.path.setBegin(output.length());
        int end = parsed.path.end();
        for (int i = parsed.path.begin(); i < end; ++i) {
            UCHAR uch = static_cast<UCHAR>(source.path[i]);
            if (uch < 0x20 || uch >= 0x80)
                success &= AppendUTF8EscapedChar(source.path, &i, end, output);
            else
                output.append(static_cast<char>(uch));
        }
        ouputParsed.path.setLength(output.length() - ouputParsed.path.begin());
    } else {
        // Empty path.
        ouputParsed.path.reset();
    }

    // Assume there's no query or ref.
    ouputParsed.query.reset();
    ouputParsed.fragment.reset();

    return success;
}

} // namespace

bool canonicalizePathURL(const char* spec, const URLSegments& parsed, URLBuffer<char>& output, URLSegments& ouputParsed)
{
    return doCanonicalizePathURL<char, unsigned char>(URLComponentSource<char>(spec), parsed, output, ouputParsed);
}

bool canonicalizePathURL(const UChar* spec, const URLSegments& parsed, URLBuffer<char>& output, URLSegments& ouputParsed)
{
    return doCanonicalizePathURL<UChar, UChar>(URLComponentSource<UChar>(spec), parsed, output, ouputParsed);
}

bool ReplacePathURL(const char* base, const URLSegments& baseParsed, const Replacements<char>& replacements, URLBuffer<char>& output, URLSegments* ouputParsed)
{
    URLComponentSource<char> source(base);
    URLSegments parsed(baseParsed);
    SetupOverrideComponents(base, replacements, &source, &parsed);
    return doCanonicalizePathURL<char, unsigned char>(source, parsed, output, *ouputParsed);
}

bool ReplacePathURL(const char* base, const URLSegments& baseParsed, const Replacements<UChar>& replacements, URLBuffer<char>& output, URLSegments* ouputParsed)
{
    RawURLBuffer<char> utf8;
    URLComponentSource<char> source(base);
    URLSegments parsed(baseParsed);
    SetupUTF16OverrideComponents(base, replacements, utf8, &source, &parsed);
    return doCanonicalizePathURL<char, unsigned char>(source, parsed, output, *ouputParsed);
}

} // namespace URLCanonicalizer

} // namespace WTF

#endif // USE(WTFURL)