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Code Issues Releases Wiki Activity

Prevent rewinding unless pipelining.

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See http://curl.haxx.se/mail/lib-2009-12/0107.html
This commit is contained in:
Yang Tse 2009-12-11 18:41:29 +00:00
parent 2fc1752d6e
commit 463d2d395c
1 changed files with 17 additions and 12 deletions
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5
lib/transfer.c
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@ -383,6 +383,8 @@ static int data_pending(const struct connectdata *conn)
static void read_rewind(struct connectdata *conn,
size_t thismuch)
{
DEBUGASSERT(conn->read_pos >= thismuch);
conn->read_pos -= thismuch;
conn->bits.stream_was_rewound = TRUE;
@ -634,6 +636,8 @@ static CURLcode readwrite_data(struct SessionHandle *data,
if((-1 != k->maxdownload) &&
(k->bytecount + nread >= k->maxdownload)) {
if(conn->data->multi && Curl_multi_canPipeline(conn->data->multi)) {
/* The 'excess' amount below can't be more than BUFSIZE which
always will fit in a size_t */
size_t excess = (size_t)(k->bytecount + nread - k->maxdownload);
@ -647,6 +651,7 @@ static CURLcode readwrite_data(struct SessionHandle *data,
k->size, k->maxdownload, k->bytecount, nread);
read_rewind(conn, excess);
}
}
nread = (ssize_t) (k->maxdownload - k->bytecount);
if(nread < 0 ) /* this should be unusual */