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#include "FetchUtil.h"
#include "nsError.h"
#include "nsIUnicodeDecoder.h"
#include "nsNetUtil.h"
#include "nsString.h"
#include "mozilla/dom/EncodingUtils.h"
namespace mozilla {
namespace dom {
// static
nsresult
FetchUtil::GetValidRequestMethod(const nsACString& aMethod, nsCString& outMethod)
{
nsAutoCString upperCaseMethod(aMethod);
ToUpperCase(upperCaseMethod);
if (!NS_IsValidHTTPToken(aMethod)) {
outMethod.SetIsVoid(true);
return NS_ERROR_DOM_SYNTAX_ERR;
}
if (upperCaseMethod.EqualsLiteral("CONNECT") ||
upperCaseMethod.EqualsLiteral("TRACE") ||
upperCaseMethod.EqualsLiteral("TRACK")) {
outMethod.SetIsVoid(true);
return NS_ERROR_DOM_SECURITY_ERR;
}
if (upperCaseMethod.EqualsLiteral("DELETE") ||
upperCaseMethod.EqualsLiteral("GET") ||
upperCaseMethod.EqualsLiteral("HEAD") ||
upperCaseMethod.EqualsLiteral("OPTIONS") ||
upperCaseMethod.EqualsLiteral("POST") ||
upperCaseMethod.EqualsLiteral("PUT")) {
outMethod = upperCaseMethod;
}
else {
outMethod = aMethod; // Case unchanged for non-standard methods
}
return NS_OK;
}
static bool
FindCRLF(nsACString::const_iterator& aStart,
nsACString::const_iterator& aEnd)
{
nsACString::const_iterator end(aEnd);
return FindInReadable(NS_LITERAL_CSTRING("\r\n"), aStart, end);
}
// Reads over a CRLF and positions start after it.
static bool
PushOverLine(nsACString::const_iterator& aStart,
const nsACString::const_iterator& aEnd)
{
if (*aStart == nsCRT::CR && (aEnd - aStart > 1) && *(++aStart) == nsCRT::LF) {
++aStart; // advance to after CRLF
return true;
}
return false;
}
// static
bool
FetchUtil::ExtractHeader(nsACString::const_iterator& aStart,
nsACString::const_iterator& aEnd,
nsCString& aHeaderName,
nsCString& aHeaderValue,
bool* aWasEmptyHeader)
{
MOZ_ASSERT(aWasEmptyHeader);
// Set it to a valid value here so we don't forget later.
*aWasEmptyHeader = false;
const char* beginning = aStart.get();
nsACString::const_iterator end(aEnd);
if (!FindCRLF(aStart, end)) {
return false;
}
if (aStart.get() == beginning) {
*aWasEmptyHeader = true;
return true;
}
nsAutoCString header(beginning, aStart.get() - beginning);
nsACString::const_iterator headerStart, iter, headerEnd;
header.BeginReading(headerStart);
header.EndReading(headerEnd);
iter = headerStart;
if (!FindCharInReadable(':', iter, headerEnd)) {
return false;
}
aHeaderName.Assign(StringHead(header, iter - headerStart));
aHeaderName.CompressWhitespace();
if (!NS_IsValidHTTPToken(aHeaderName)) {
return false;
}
aHeaderValue.Assign(Substring(++iter, headerEnd));
if (!NS_IsReasonableHTTPHeaderValue(aHeaderValue)) {
return false;
}
aHeaderValue.CompressWhitespace();
return PushOverLine(aStart, aEnd);
}
} // namespace dom
} // namespace mozilla
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