C++ StringView::toString方法代码示例

// https://wicg.github.io/entries-api/#resolve-a-relative-path
static String resolveRelativeVirtualPath(StringView baseVirtualPath, StringView relativeVirtualPath)
{
    ASSERT(baseVirtualPath[0] == '/');
    if (!relativeVirtualPath.isEmpty() && relativeVirtualPath[0] == '/')
        return relativeVirtualPath.length() == 1 ? relativeVirtualPath.toString() : resolveRelativeVirtualPath("/", relativeVirtualPath.substring(1));

    Vector<StringView> virtualPathSegments;
    for (auto segment : baseVirtualPath.split('/'))
        virtualPathSegments.append(segment);

    for (auto segment : relativeVirtualPath.split('/')) {
        ASSERT(!segment.isEmpty());
        if (segment == ".")
            continue;
        if (segment == "..") {
            if (!virtualPathSegments.isEmpty())
                virtualPathSegments.removeLast();
            continue;
        }
        virtualPathSegments.append(segment);
    }

    if (virtualPathSegments.isEmpty())
        return "/"_s;

    StringBuilder builder;
    for (auto& segment : virtualPathSegments) {
        builder.append('/');
        builder.append(segment);
    }
    return builder.toString();
}

 size_t lastHyphenLocation(const StringView& text,
                           size_t beforeIndex) const override {
   CFIndex result = CFStringGetHyphenationLocationBeforeIndex(
       text.toString().impl()->createCFString().get(), beforeIndex,
       CFRangeMake(0, text.length()), 0, m_localeCF.get(), 0);
   return result == kCFNotFound ? 0 : result;
 }

static void setWindowFeature(WindowFeatures& features, StringView key, StringView value)
{
    // Listing a key with no value is shorthand for key=yes
    int numericValue;
    if (value.isEmpty() || equalLettersIgnoringASCIICase(value, "yes"))
        numericValue = 1;
    else
        numericValue = value.toInt();

    // We treat key of "resizable" here as an additional feature rather than setting resizeable to true.
    // This is consistent with Firefox, but could also be handled at another level.

    if (equalLettersIgnoringASCIICase(key, "left") || equalLettersIgnoringASCIICase(key, "screenx"))
        features.x = numericValue;
    else if (equalLettersIgnoringASCIICase(key, "top") || equalLettersIgnoringASCIICase(key, "screeny"))
        features.y = numericValue;
    else if (equalLettersIgnoringASCIICase(key, "width") || equalLettersIgnoringASCIICase(key, "innerwidth"))
        features.width = numericValue;
    else if (equalLettersIgnoringASCIICase(key, "height") || equalLettersIgnoringASCIICase(key, "innerheight"))
        features.height = numericValue;
    else if (equalLettersIgnoringASCIICase(key, "menubar"))
        features.menuBarVisible = numericValue;
    else if (equalLettersIgnoringASCIICase(key, "toolbar"))
        features.toolBarVisible = numericValue;
    else if (equalLettersIgnoringASCIICase(key, "location"))
        features.locationBarVisible = numericValue;
    else if (equalLettersIgnoringASCIICase(key, "status"))
        features.statusBarVisible = numericValue;
    else if (equalLettersIgnoringASCIICase(key, "fullscreen"))
        features.fullscreen = numericValue;
    else if (equalLettersIgnoringASCIICase(key, "scrollbars"))
        features.scrollbarsVisible = numericValue;
    else if (numericValue == 1)
        features.additionalFeatures.append(key.toString());
}

size_t MockHyphenation::lastHyphenLocation(const StringView& text,
                                           size_t beforeIndex) const {
  String str = text.toString();
  if (str.endsWith("phenation", TextCaseASCIIInsensitive)) {
    if (beforeIndex - (str.length() - 9) > 4)
      return 4 + (str.length() - 9);
    if (str.endsWith("hyphenation", TextCaseASCIIInsensitive) &&
        beforeIndex - (str.length() - 11) > 2) {
      return 2 + (str.length() - 11);
    }
  }
  return 0;
}

bool ScriptCustomElementDefinitionBuilder::callableForName(
    const StringView& name,
    v8::Local<v8::Function>& callback) const {
  v8::Local<v8::Value> value;
  if (!valueForName(m_prototype, name, value))
    return false;
  // "undefined" means "omitted", so return true.
  if (value->IsUndefined())
    return true;
  if (!value->IsFunction()) {
    m_exceptionState.throwTypeError(String::format(
        "\"%s\" is not a callable object", name.toString().ascii().data()));
    return false;
  }
  callback = value.As<v8::Function>();
  return true;
}

bool MultipartHandle::parseHeadersIfPossible()
{
    size_t contentLength = m_buffer.size();

    if (!contentLength)
        return false;

    const char* content = m_buffer.data();

    // Check if we have the header closing strings.
    if (!strnstr(content, "\r\n\r\n", contentLength)) {
        // Some servers closes the headers with only \n-s.
        if (!strnstr(content, "\n\n", contentLength)) {
            // Don't have the header closing string. Wait for more data.
            return false;
        }
    }

    // Parse the HTTP headers.
    String value;
    StringView name;
    char* p = const_cast<char*>(content);
    const char* end = content + contentLength;
    size_t totalConsumedLength = 0;
    for (; p < end; ++p) {
        String failureReason;
        size_t consumedLength = parseHTTPHeader(p, end - p, failureReason, name, value, false);
        if (!consumedLength)
            break; // No more header to parse.

        p += consumedLength;
        totalConsumedLength += consumedLength;

        // The name should not be empty, but the value could be empty.
        if (name.isEmpty())
            break;

        m_headers.add(name.toString(), value);
    }

    m_buffer.remove(0, totalConsumedLength + 1);
    return true;
}

const char* WebSocketHandshake::readHTTPHeaders(const char* start, const char* end)
{
    StringView name;
    String value;
    bool sawSecWebSocketExtensionsHeaderField = false;
    bool sawSecWebSocketAcceptHeaderField = false;
    bool sawSecWebSocketProtocolHeaderField = false;
    const char* p = start;
    for (; p < end; p++) {
        size_t consumedLength = parseHTTPHeader(p, end - p, m_failureReason, name, value);
        if (!consumedLength)
            return nullptr;
        p += consumedLength;

        // Stop once we consumed an empty line.
        if (name.isEmpty())
            break;

        HTTPHeaderName headerName;
        if (!findHTTPHeaderName(name, headerName)) {
            // Evidence in the wild shows that services make use of custom headers in the handshake
            m_serverHandshakeResponse.addHTTPHeaderField(name.toString(), value);
            continue;
        }

        // https://tools.ietf.org/html/rfc7230#section-3.2.4
        // "Newly defined header fields SHOULD limit their field values to US-ASCII octets."
        if ((headerName == HTTPHeaderName::SecWebSocketExtensions
            || headerName == HTTPHeaderName::SecWebSocketAccept
            || headerName == HTTPHeaderName::SecWebSocketProtocol)
            && !value.containsOnlyASCII()) {
            m_failureReason = makeString(name, " header value should only contain ASCII characters");
            return nullptr;
        }
        
        if (headerName == HTTPHeaderName::SecWebSocketExtensions) {
            if (sawSecWebSocketExtensionsHeaderField) {
                m_failureReason = ASCIILiteral("The Sec-WebSocket-Extensions header must not appear more than once in an HTTP response");
                return nullptr;
            }
            if (!m_extensionDispatcher.processHeaderValue(value)) {
                m_failureReason = m_extensionDispatcher.failureReason();
                return nullptr;
            }
            sawSecWebSocketExtensionsHeaderField = true;
        } else {
            if (headerName == HTTPHeaderName::SecWebSocketAccept) {
                if (sawSecWebSocketAcceptHeaderField) {
                    m_failureReason = ASCIILiteral("The Sec-WebSocket-Accept header must not appear more than once in an HTTP response");
                    return nullptr;
                }
                sawSecWebSocketAcceptHeaderField = true;
            } else if (headerName == HTTPHeaderName::SecWebSocketProtocol) {
                if (sawSecWebSocketProtocolHeaderField) {
                    m_failureReason = ASCIILiteral("The Sec-WebSocket-Protocol header must not appear more than once in an HTTP response");
                    return nullptr;
                }
                sawSecWebSocketProtocolHeaderField = true;
            }

            m_serverHandshakeResponse.addHTTPHeaderField(headerName, value);
        }
    }
    return p;
}