nsresult
nsHttpTransaction::ParseHead(char *buf,
PRUint32 count,
PRUint32 *countRead)
{
nsresult rv;
PRUint32 len;
char *eol;
LOG(("nsHttpTransaction::ParseHead [count=%u]\n", count));
*countRead = 0;
NS_PRECONDITION(!mHaveAllHeaders, "oops");
// allocate the response head object if necessary
if (!mResponseHead) {
mResponseHead = new nsHttpResponseHead();
if (!mResponseHead)
return NS_ERROR_OUT_OF_MEMORY;
// report that we have a least some of the response
if (mActivityDistributor)
mActivityDistributor->ObserveActivity(
mChannel,
NS_HTTP_ACTIVITY_TYPE_HTTP_TRANSACTION,
NS_HTTP_ACTIVITY_SUBTYPE_RESPONSE_START,
PR_Now(), LL_ZERO, EmptyCString());
}
// if we don't have a status line and the line buf is empty, then
// this must be the first time we've been called.
if (!mHaveStatusLine && mLineBuf.IsEmpty()) {
// tolerate some junk before the status line
char *p = LocateHttpStart(buf, PR_MIN(count, 8));
if (!p) {
// Treat any 0.9 style response of a put as a failure.
if (mRequestHead->Method() == nsHttp::Put)
return NS_ERROR_ABORT;
mResponseHead->ParseStatusLine("");
mHaveStatusLine = PR_TRUE;
mHaveAllHeaders = PR_TRUE;
return NS_OK;
}
if (p > buf) {
// skip over the junk
*countRead = p - buf;
buf = p;
}
}
// otherwise we can assume that we don't have a HTTP/0.9 response.
while ((eol = static_cast<char *>(memchr(buf, '\n', count - *countRead))) != nsnull) {
// found line in range [buf:eol]
len = eol - buf + 1;
*countRead += len;
// actually, the line is in the range [buf:eol-1]
if ((eol > buf) && (*(eol-1) == '\r'))
len--;
buf[len-1] = '\n';
rv = ParseLineSegment(buf, len);
if (NS_FAILED(rv))
return rv;
if (mHaveAllHeaders)
return NS_OK;
// skip over line
buf = eol + 1;
}
// do something about a partial header line
if (!mHaveAllHeaders && (len = count - *countRead)) {
*countRead = count;
// ignore a trailing carriage return, and don't bother calling
// ParseLineSegment if buf only contains a carriage return.
if ((buf[len-1] == '\r') && (--len == 0))
return NS_OK;
rv = ParseLineSegment(buf, len);
if (NS_FAILED(rv))
return rv;
}
return NS_OK;
}
nsresult
nsHttpTransaction::ParseHead(char *buf,
PRUint32 count,
PRUint32 *countRead)
{
nsresult rv;
PRUint32 len;
char *eol;
LOG(("nsHttpTransaction::ParseHead [count=%u]\n", count));
*countRead = 0;
NS_PRECONDITION(!mHaveAllHeaders, "oops");
// allocate the response head object if necessary
if (!mResponseHead) {
mResponseHead = new nsHttpResponseHead();
if (!mResponseHead)
return NS_ERROR_OUT_OF_MEMORY;
// report that we have a least some of the response
if (mActivityDistributor)
mActivityDistributor->ObserveActivity(
mChannel,
NS_HTTP_ACTIVITY_TYPE_HTTP_TRANSACTION,
NS_HTTP_ACTIVITY_SUBTYPE_RESPONSE_START,
PR_Now(), LL_ZERO, EmptyCString());
}
if (!mHttpResponseMatched) {
// Normally we insist on seeing HTTP/1.x in the first few bytes,
// but if we are on a persistent connection and the previous transaction
// was not supposed to have any content then we need to be prepared
// to skip over a response body that the server may have sent even
// though it wasn't allowed.
if (!mConnection || !mConnection->LastTransactionExpectedNoContent()) {
// tolerate only minor junk before the status line
mHttpResponseMatched = true;
char *p = LocateHttpStart(buf, NS_MIN<PRUint32>(count, 11), true);
if (!p) {
// Treat any 0.9 style response of a put as a failure.
if (mRequestHead->Method() == nsHttp::Put)
return NS_ERROR_ABORT;
mResponseHead->ParseStatusLine("");
mHaveStatusLine = true;
mHaveAllHeaders = true;
return NS_OK;
}
if (p > buf) {
// skip over the junk
mInvalidResponseBytesRead += p - buf;
*countRead = p - buf;
buf = p;
}
}
else {
char *p = LocateHttpStart(buf, count, false);
if (p) {
mInvalidResponseBytesRead += p - buf;
*countRead = p - buf;
buf = p;
mHttpResponseMatched = true;
} else {
mInvalidResponseBytesRead += count;
*countRead = count;
if (mInvalidResponseBytesRead > MAX_INVALID_RESPONSE_BODY_SIZE) {
LOG(("nsHttpTransaction::ParseHead() "
"Cannot find Response Header\n"));
// cannot go back and call this 0.9 anymore as we
// have thrown away a lot of the leading junk
return NS_ERROR_ABORT;
}
return NS_OK;
}
}
}
// otherwise we can assume that we don't have a HTTP/0.9 response.
NS_ABORT_IF_FALSE (mHttpResponseMatched, "inconsistent");
while ((eol = static_cast<char *>(memchr(buf, '\n', count - *countRead))) != nsnull) {
// found line in range [buf:eol]
len = eol - buf + 1;
*countRead += len;
// actually, the line is in the range [buf:eol-1]
if ((eol > buf) && (*(eol-1) == '\r'))
len--;
buf[len-1] = '\n';
rv = ParseLineSegment(buf, len);
if (NS_FAILED(rv))
return rv;
if (mHaveAllHeaders)
return NS_OK;
// skip over line
buf = eol + 1;
if (!mHttpResponseMatched) {
// a 100 class response has caused us to throw away that set of
// response headers and look for the next response
return NS_ERROR_NET_INTERRUPT;
}
}
// do something about a partial header line
if (!mHaveAllHeaders && (len = count - *countRead)) {
*countRead = count;
// ignore a trailing carriage return, and don't bother calling
// ParseLineSegment if buf only contains a carriage return.
if ((buf[len-1] == '\r') && (--len == 0))
return NS_OK;
rv = ParseLineSegment(buf, len);
if (NS_FAILED(rv))
return rv;
}
return NS_OK;
}
