C++ nsACString::First方法代码示例

NS_IMETHODIMP MsgMailNewsUrlBase::Resolve(const nsACString &relativePath, nsACString &result) 
{
  // only resolve anchor urls....i.e. urls which start with '#' against the mailnews url...
  // everything else shouldn't be resolved against mailnews urls.
  nsresult rv = NS_OK;

  if (!relativePath.IsEmpty() && relativePath.First() == '#') // an anchor
    return m_baseURL->Resolve(relativePath, result);
  else
  {
    // if relativePath is a complete url with it's own scheme then allow it...
    nsCOMPtr<nsIIOService> ioService =
      mozilla::services::GetIOService();
    NS_ENSURE_TRUE(ioService, NS_ERROR_UNEXPECTED);
    nsAutoCString scheme;

    rv = ioService->ExtractScheme(relativePath, scheme);
    // if we have a fully qualified scheme then pass the relative path back as the result
    if (NS_SUCCEEDED(rv) && !scheme.IsEmpty())
    {
      result = relativePath;
      rv = NS_OK;
    }
    else
    {
      result.Truncate();
      rv = NS_ERROR_FAILURE;
    }
  }

  return rv;
}

NS_IMETHODIMP
RustURL::SetPath(const nsACString & aPath)
{
  ENSURE_MUTABLE();

  nsAutoCString path;
  nsresult rv = GetPrePath(path);
  if (NS_FAILED(rv)) {
    return rv;
  }

  if (aPath.Length() > 0 && aPath.First() != '/') {
    path.Append('/');
  }
  path.Append(aPath);

  return SetSpec(path);
}

static bool HostIgnoredByProxy(const nsACString& aIgnore,
                               const nsACString& aHost)
{
  if (aIgnore.Equals(aHost, nsCaseInsensitiveCStringComparator()))
    return true;

  if (aIgnore.First() == '*' &&
      StringEndsWith(aHost, nsDependentCSubstring(aIgnore, 1),
                     nsCaseInsensitiveCStringComparator()))
    return true;

  int32_t mask = 128;
  nsReadingIterator<char> start;
  nsReadingIterator<char> slash;
  nsReadingIterator<char> end;
  aIgnore.BeginReading(start);
  aIgnore.BeginReading(slash);
  aIgnore.EndReading(end);
  if (FindCharInReadable('/', slash, end)) {
    ++slash;
    nsDependentCSubstring maskStr(slash, end);
    nsAutoCString maskStr2(maskStr);
    nsresult err;
    mask = maskStr2.ToInteger(&err);
    if (NS_FAILED(err)) {
      mask = 128;
    }
    --slash;
  } else {
    slash = end;
  }

  nsDependentCSubstring ignoreStripped(start, slash);
  PRIPv6Addr ignoreAddr, hostAddr;
  if (!ConvertToIPV6Addr(ignoreStripped, &ignoreAddr, &mask) ||
      !ConvertToIPV6Addr(aHost, &hostAddr, nullptr))
    return false;

  proxy_MaskIPv6Addr(ignoreAddr, mask);
  proxy_MaskIPv6Addr(hostAddr, mask);
  
  return memcmp(&ignoreAddr, &hostAddr, sizeof(PRIPv6Addr)) == 0;
}

static PRBool GConfIgnoreHost(const nsACString& aIgnore,
                              const nsACString& aHost)
{
  if (aIgnore.Equals(aHost, nsCaseInsensitiveCStringComparator()))
    return PR_TRUE;

  if (aIgnore.First() == '*' &&
      StringEndsWith(aHost, nsDependentCSubstring(aIgnore, 1),
                     nsCaseInsensitiveCStringComparator()))
    return PR_TRUE;

  PRInt32 mask = 128;
  nsReadingIterator<char> start;
  nsReadingIterator<char> slash;
  nsReadingIterator<char> end;
  aIgnore.BeginReading(start);
  aIgnore.BeginReading(slash);
  aIgnore.EndReading(end);
  if (FindCharInReadable('/', slash, end)) {
    ++slash;
    nsDependentCSubstring maskStr(slash, end);
    nsCAutoString maskStr2(maskStr);
    PRInt32 err;
    mask = maskStr2.ToInteger(&err);
    if (err != 0) {
      mask = 128;
    }
    --slash;
  } else {
    slash = end;
  }

  PRIPv6Addr ignoreAddr, hostAddr;
  if (!ConvertToIPV6Addr(aIgnore, &ignoreAddr) ||
      !ConvertToIPV6Addr(aHost, &hostAddr))
    return PR_FALSE;

  proxy_MaskIPv6Addr(ignoreAddr, mask);
  proxy_MaskIPv6Addr(hostAddr, mask);
  
  return memcmp(&ignoreAddr, &hostAddr, sizeof(PRIPv6Addr)) == 0;
}

nsresult nsDefaultURIFixup::ConvertFileToStringURI(const nsACString& aIn,
                                                   nsCString& aOut)
{
    bool attemptFixup = false;

#if defined(XP_WIN)
    // Check for \ in the url-string or just a drive (PC)
    if(kNotFound != aIn.FindChar('\\') ||
       (aIn.Length() == 2 && (aIn.Last() == ':' || aIn.Last() == '|')))
    {
        attemptFixup = true;
    }
#elif defined(XP_UNIX)
    // Check if it starts with / (UNIX)
    if(aIn.First() == '/')
    {
        attemptFixup = true;
    }
#else
    // Do nothing (All others for now) 
#endif

    if (attemptFixup)
    {
        // Test if this is a valid path by trying to create a local file
        // object. The URL of that is returned if successful.

        // NOTE: Please be sure to check that the call to NS_NewLocalFile
        //       rejects bad file paths when using this code on a new
        //       platform.

        nsCOMPtr<nsIFile> filePath;
        nsresult rv;

        // this is not the real fix but a temporary fix
        // in order to really fix the problem, we need to change the 
        // nsICmdLineService interface to use wstring to pass paramenters 
        // instead of string since path name and other argument could be
        // in non ascii.(see bug 87127) Since it is too risky to make interface change right
        // now, we decide not to do so now.
        // Therefore, the aIn we receive here maybe already in damage form
        // (e.g. treat every bytes as ISO-8859-1 and cast up to char16_t
        //  while the real data could be in file system charset )
        // we choice the following logic which will work for most of the case.
        // Case will still failed only if it meet ALL the following condiction:
        //    1. running on CJK, Russian, or Greek system, and 
        //    2. user type it from URL bar
        //    3. the file name contains character in the range of 
        //       U+00A1-U+00FF but encode as different code point in file
        //       system charset (e.g. ACP on window)- this is very rare case
        // We should remove this logic and convert to File system charset here
        // once we change nsICmdLineService to use wstring and ensure
        // all the Unicode data come in is correctly converted.
        // XXXbz nsICmdLineService doesn't hand back unicode, so in some cases
        // what we have is actually a "utf8" version of a "utf16" string that's
        // actually byte-expanded native-encoding data.  Someone upstream needs
        // to stop using AssignWithConversion and do things correctly.  See bug
        // 58866 for what happens if we remove this
        // PossiblyByteExpandedFileName check.
        NS_ConvertUTF8toUTF16 in(aIn);
        if (PossiblyByteExpandedFileName(in)) {
          // removes high byte
          rv = NS_NewNativeLocalFile(NS_LossyConvertUTF16toASCII(in), false, getter_AddRefs(filePath));
        }
        else {
          // input is unicode
          rv = NS_NewLocalFile(in, false, getter_AddRefs(filePath));
        }

        if (NS_SUCCEEDED(rv))
        {
            NS_GetURLSpecFromFile(filePath, aOut);
            return NS_OK;
        }
    }

    return NS_ERROR_FAILURE;
}