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CONNECT: Revert Curl_proxyCONNECT back to 7.29.0 design

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This reverts commit cb3e6dfa35 and instead fixes the problem
differently.

The reverted commit addressed a test failure in test 1021 by simplifying
and generalizing the code flow in a way that damaged the
performance. Now we modify the flow so that Curl_proxyCONNECT() again
does as much as possible in one go, yet still do test 1021 with and
without valgrind. It failed due to mistakes in the multi state machine.

Bug: http://curl.haxx.se/bug/view.cgi?id=1397
Reported-by: Paul Saab
This commit is contained in:
Daniel Stenberg 2014-07-19 23:58:58 +02:00
parent d242839af8
commit a4cece3d47
2 changed files with 42 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

51
lib/http_proxy.c
View File

@ -98,8 +98,6 @@ CURLcode Curl_proxyCONNECT(struct connectdata *conn,
struct SessionHandle *data=conn->data;
struct SingleRequest *k = &data->req;
CURLcode result;
long timeout =
data->set.timeout?data->set.timeout:PROXY_TIMEOUT; /* in milliseconds */
curl_socket_t tunnelsocket = conn->sock[sockindex];
curl_off_t cl=0;
bool closeConnection = FALSE;
@ -223,14 +221,25 @@ CURLcode Curl_proxyCONNECT(struct connectdata *conn,
return result;
conn->tunnel_state[sockindex] = TUNNEL_CONNECT;
/* now we've issued the CONNECT and we're waiting to hear back, return
and get called again polling-style */
return CURLE_OK;
} /* END CONNECT PHASE */
{ /* BEGIN NEGOTIATION PHASE */
check = Curl_timeleft(data, NULL, TRUE);
if(check <= 0) {
failf(data, "Proxy CONNECT aborted due to timeout");
return CURLE_RECV_ERROR;
}
if(0 == Curl_socket_ready(tunnelsocket, CURL_SOCKET_BAD, 0))
/* return so we'll be called again polling-style */
return CURLE_OK;
else {
DEBUGF(infof(data,
"Read response immediately from proxy CONNECT\n"));
}
/* at this point, the tunnel_connecting phase is over. */
{ /* READING RESPONSE PHASE */
size_t nread; /* total size read */
int perline; /* count bytes per line */
int keepon=TRUE;
@ -247,9 +256,7 @@ CURLcode Curl_proxyCONNECT(struct connectdata *conn,
while((nread<BUFSIZE) && (keepon && !error)) {
/* if timeout is requested, find out how much remaining time we have */
check = timeout - /* timeout time */
Curl_tvdiff(Curl_tvnow(), conn->now); /* spent time */
check = Curl_timeleft(data, NULL, TRUE);
if(check <= 0) {
failf(data, "Proxy CONNECT aborted due to timeout");
error = SELECT_TIMEOUT; /* already too little time */
@ -279,6 +286,7 @@ CURLcode Curl_proxyCONNECT(struct connectdata *conn,
/* proxy auth was requested and there was proxy auth available,
then deem this as "mere" proxy disconnect */
conn->bits.proxy_connect_closed = TRUE;
infof(data, "Proxy CONNECT connection closed");
}
else {
error = SELECT_ERROR;
@ -527,7 +535,7 @@ CURLcode Curl_proxyCONNECT(struct connectdata *conn,
conn->sock[sockindex] = CURL_SOCKET_BAD;
break;
}
} /* END NEGOTIATION PHASE */
} /* END READING RESPONSE PHASE */
/* If we are supposed to continue and request a new URL, which basically
* means the HTTP authentication is still going on so if the tunnel
@ -542,13 +550,11 @@ CURLcode Curl_proxyCONNECT(struct connectdata *conn,
} while(data->req.newurl);
if(200 != data->req.httpcode) {
failf(data, "Received HTTP code %d from proxy after CONNECT",
data->req.httpcode);
if(closeConnection && data->req.newurl)
if(closeConnection && data->req.newurl) {
conn->bits.proxy_connect_closed = TRUE;
if(data->req.newurl) {
infof(data, "Connect me again please\n");
}
else if(data->req.newurl) {
/* this won't be used anymore for the CONNECT so free it now */
free(data->req.newurl);
data->req.newurl = NULL;
@ -557,7 +563,14 @@ CURLcode Curl_proxyCONNECT(struct connectdata *conn,
/* to back to init state */
conn->tunnel_state[sockindex] = TUNNEL_INIT;
return CURLE_RECV_ERROR;
if(conn->bits.proxy_connect_closed)
/* this is not an error, just part of the connection negotiation */
return CURLE_OK;
else {
failf(data, "Received HTTP code %d from proxy after CONNECT",
data->req.httpcode);
return CURLE_RECV_ERROR;
}
}
conn->tunnel_state[sockindex] = TUNNEL_COMPLETE;

16
lib/multi.c
View File

@ -1137,11 +1137,7 @@ static CURLMcode multi_runsingle(struct Curl_multi *multi,
data->result = Curl_http_connect(data->easy_conn, &protocol_connect);
if(data->easy_conn->bits.proxy_connect_closed) {
/* reset the error buffer */
if(data->set.errorbuffer)
data->set.errorbuffer[0] = '\0';
data->state.errorbuf = FALSE;
/* connect back to proxy again */
data->result = CURLE_OK;
result = CURLM_CALL_MULTI_PERFORM;
multistate(data, CURLM_STATE_CONNECT);
@ -1167,7 +1163,15 @@ static CURLMcode multi_runsingle(struct Curl_multi *multi,
&protocol_connect);
}
if(CURLE_OK != data->result) {
if(data->easy_conn->bits.proxy_connect_closed) {
/* connect back to proxy again since it was closed in a proxy CONNECT
setup */
data->result = CURLE_OK;
result = CURLM_CALL_MULTI_PERFORM;
multistate(data, CURLM_STATE_CONNECT);
break;
}
else if(CURLE_OK != data->result) {
/* failure detected */
/* Just break, the cleaning up is handled all in one place */
disconnect_conn = TRUE;