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uhttpd: - fix parsing of interpreter entries in the config file, fixes serving of static files as .cgi with X-Wrt - better cope with connection aborts, especially during header transfer - fix return value checking of TLS reads and writes, solves some blocking issues

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SVN-Revision: 22692
This commit is contained in:
Jo-Philipp Wich
2010-08-18 00:04:52 +00:00
parent af0ecdebfd
commit cbdeb30a1b
8 changed files with 141 additions and 108 deletions
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61
package/uhttpd/src/uhttpd-cgi.c
View File

@@ -139,7 +139,7 @@ void uh_cgi_request(
struct client *cl, struct http_request *req,
struct path_info *pi, struct interpreter *ip
) {
int i, hdroff, bufoff;
int i, hdroff, bufoff, rv;
int hdrlen = 0;
int buflen = 0;
int fd_max = 0;
@@ -376,12 +376,6 @@ void uh_cgi_request(
memset(hdr, 0, sizeof(hdr));
timeout.tv_sec = cl->server->conf->script_timeout;
timeout.tv_usec = 0;
#define ensure(x) \
do { if( x < 0 ) goto out; } while(0)
/* I/O loop, watch our pipe ends and dispatch child reads/writes from/to socket */
while( 1 )
{
@@ -391,11 +385,21 @@ void uh_cgi_request(
FD_SET(rfd[0], &reader);
FD_SET(wfd[1], &writer);
timeout.tv_sec = (header_sent < 1) ? cl->server->conf->script_timeout : 3;
timeout.tv_usec = 0;
ensure_out(rv = select_intr(fd_max, &reader,
(content_length > -1) ? &writer : NULL, NULL, &timeout));
/* timeout */
if( rv == 0 )
{
ensure_out(kill(child, 0));
}
/* wait until we can read or write or both */
if( select_intr(fd_max, &reader,
(content_length > -1) ? &writer : NULL, NULL,
(header_sent < 1) ? &timeout : NULL) > 0
) {
else if( rv > 0 )
{
/* ready to write to cgi program */
if( FD_ISSET(wfd[1], &writer) )
{
@@ -403,7 +407,10 @@ void uh_cgi_request(
if( content_length > 0 )
{
/* read it from socket ... */
if( (buflen = uh_tcp_recv(cl, buf, min(content_length, sizeof(buf)))) > 0 )
ensure_out(buflen = uh_tcp_recv(cl, buf,
min(content_length, sizeof(buf))));
if( buflen > 0 )
{
/* ... and write it to child's stdin */
if( write(wfd[1], buf, buflen) < 0 )
@@ -456,7 +463,7 @@ void uh_cgi_request(
if( (res = uh_cgi_header_parse(hdr, hdrlen, &hdroff)) != NULL )
{
/* write status */
ensure(uh_http_sendf(cl, NULL,
ensure_out(uh_http_sendf(cl, NULL,
"HTTP/%.1f %03d %s\r\n"
"Connection: close\r\n",
req->version, res->statuscode,
@@ -466,7 +473,7 @@ void uh_cgi_request(
if( !uh_cgi_header_lookup(res, "Location") &&
!uh_cgi_header_lookup(res, "Content-Type")
) {
ensure(uh_http_send(cl, NULL,
ensure_out(uh_http_send(cl, NULL,
"Content-Type: text/plain\r\n", -1));
}
@@ -474,32 +481,32 @@ void uh_cgi_request(
if( (req->version > 1.0) &&
!uh_cgi_header_lookup(res, "Transfer-Encoding")
) {
ensure(uh_http_send(cl, NULL,
ensure_out(uh_http_send(cl, NULL,
"Transfer-Encoding: chunked\r\n", -1));
}
/* write headers from CGI program */
foreach_header(i, res->headers)
{
ensure(uh_http_sendf(cl, NULL, "%s: %s\r\n",
ensure_out(uh_http_sendf(cl, NULL, "%s: %s\r\n",
res->headers[i], res->headers[i+1]));
}
/* terminate header */
ensure(uh_http_send(cl, NULL, "\r\n", -1));
ensure_out(uh_http_send(cl, NULL, "\r\n", -1));
/* push out remaining head buffer */
if( hdroff < hdrlen )
ensure(uh_http_send(cl, req, &hdr[hdroff], hdrlen - hdroff));
ensure_out(uh_http_send(cl, req, &hdr[hdroff], hdrlen - hdroff));
}
/* ... failed and head buffer exceeded */
else if( hdrlen >= sizeof(hdr) )
{
ensure(uh_cgi_error_500(cl, req,
ensure_out(uh_cgi_error_500(cl, req,
"The CGI program generated an invalid response:\n\n"));
ensure(uh_http_send(cl, req, hdr, hdrlen));
ensure_out(uh_http_send(cl, req, hdr, hdrlen));
}
/* ... failed but free buffer space, try again */
@@ -510,7 +517,7 @@ void uh_cgi_request(
/* push out remaining read buffer */
if( bufoff < buflen )
ensure(uh_http_send(cl, req, &buf[bufoff], buflen - bufoff));
ensure_out(uh_http_send(cl, req, &buf[bufoff], buflen - bufoff));
header_sent = 1;
continue;
@@ -518,7 +525,7 @@ void uh_cgi_request(
/* headers complete, pass through buffer to socket */
ensure(uh_http_send(cl, req, buf, buflen));
ensure_out(uh_http_send(cl, req, buf, buflen));
}
/* looks like eof from child */
@@ -538,7 +545,7 @@ void uh_cgi_request(
* build the required headers here.
*/
ensure(uh_http_sendf(cl, NULL,
ensure_out(uh_http_sendf(cl, NULL,
"HTTP/%.1f 200 OK\r\n"
"Content-Type: text/plain\r\n"
"%s\r\n",
@@ -546,11 +553,11 @@ void uh_cgi_request(
? "Transfer-Encoding: chunked\r\n" : ""
));
ensure(uh_http_send(cl, req, hdr, hdrlen));
ensure_out(uh_http_send(cl, req, hdr, hdrlen));
}
/* send final chunk if we're in chunked transfer mode */
ensure(uh_http_send(cl, req, "", 0));
ensure_out(uh_http_send(cl, req, "", 0));
break;
}
}
@@ -561,13 +568,13 @@ void uh_cgi_request(
{
if( (errno != EINTR) && ! header_sent )
{
ensure(uh_http_sendhf(cl, 504, "Gateway Timeout",
ensure_out(uh_http_sendhf(cl, 504, "Gateway Timeout",
"The CGI script took too long to produce "
"a response"));
}
/* send final chunk if we're in chunked transfer mode */
ensure(uh_http_send(cl, req, "", 0));
ensure_out(uh_http_send(cl, req, "", 0));
break;
}