void
net_FilterURIString(const nsACString& input, nsACString& result)
{
const char kCharsToStrip[] = "\r\n\t";
result.Truncate();
auto start = input.BeginReading();
auto end = input.EndReading();
// Trim off leading and trailing invalid chars.
auto charFilter = [](char c) { return static_cast<uint8_t>(c) > 0x20; };
auto newStart = std::find_if(start, end, charFilter);
auto newEnd = std::find_if(
std::reverse_iterator<decltype(end)>(end),
std::reverse_iterator<decltype(newStart)>(newStart),
charFilter).base();
// Check if chars need to be stripped.
auto itr = std::find_first_of(
newStart, newEnd, std::begin(kCharsToStrip), std::end(kCharsToStrip));
const bool needsStrip = itr != newEnd;
// Just use the passed in string rather than creating new copies if no
// changes are necessary.
if (newStart == start && newEnd == end && !needsStrip) {
result = input;
return;
}
result.Assign(Substring(newStart, newEnd));
if (needsStrip) {
result.StripChars(kCharsToStrip);
}
}
/* Extract URI-Scheme if possible */
nsresult
net_ExtractURLScheme(const nsACString &inURI,
nsACString& scheme)
{
nsACString::const_iterator start, end;
inURI.BeginReading(start);
inURI.EndReading(end);
// Strip C0 and space from begining
while (start != end) {
if ((uint8_t) *start > 0x20) {
break;
}
start++;
}
Tokenizer p(Substring(start, end), "\r\n\t");
p.Record();
if (!p.CheckChar(isAsciiAlpha)) {
// First char must be alpha
return NS_ERROR_MALFORMED_URI;
}
while (p.CheckChar(net_IsValidSchemeChar) || p.CheckWhite()) {
// Skip valid scheme characters or \r\n\t
}
if (!p.CheckChar(':')) {
return NS_ERROR_MALFORMED_URI;
}
p.Claim(scheme);
scheme.StripChars("\r\n\t");
return NS_OK;
}