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Set the TCP_NODELAY socket option and clear TCP_NOPUSH in order to flush 

any pending HTTP request rather than calling shutdown(2) with SHUT_WR.
This makes libfetch (and thus fetch(1)) work again with Squid proxies
configured to not allow half-closed connections.

Reported by:	Pawel Worach (pawel.worach AT telia DOT com)
This commit is contained in:
Kelly Yancey 2005-03-02 19:09:28 +00:00
parent bed34fbfb6
commit 448980e704
1 changed files with 15 additions and 2 deletions
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17
lib/libfetch/http.c
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@ -792,7 +792,7 @@ _http_request(struct url *URL, const char *op, struct url_stat *us,
conn_t *conn;
struct url *url, *new;
int chunked, direct, need_auth, noredirect, verbose;
int e, i, n;
int e, i, n, val;
off_t offset, clength, length, size;
time_t mtime;
const char *p;
@ -913,7 +913,20 @@ _http_request(struct url *URL, const char *op, struct url_stat *us,
_http_cmd(conn, "Range: bytes=%lld-", (long long)url->offset);
_http_cmd(conn, "Connection: close");
_http_cmd(conn, "");
shutdown(conn->sd, SHUT_WR);
/*
* Force the queued request to be dispatched. Normally, one
* would do this with shutdown(2) but squid proxies can be
* configured to disallow such half-closed connections. To
* be compatible with such configurations, fiddle with socket
* options to force the pending data to be written.
*/
val = 0;
setsockopt(conn->sd, IPPROTO_TCP, TCP_NOPUSH, &val,
sizeof(val));
val = 1;
setsockopt(conn->sd, IPPROTO_TCP, TCP_NODELAY, &val,
sizeof(val));
/* get reply */
switch (_http_get_reply(conn)) {