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[package] uhttpd:

Browse Source 
- rewrite large parts of the server, use uloop event driven structure
	- support concurrent requests and make the upper limit configurable
	- implement initial version of HTTP-to-ubus JSON proxy and session.* namespace
	- add compile time support for debug information
	- code style changes
	- bump package revision

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@31931 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
jow
2012-05-28 00:52:24 +00:00
parent dfea949949
commit 8b4e17bfbc
18 changed files with 2637 additions and 1393 deletions
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838
package/uhttpd/src/uhttpd-cgi.c
View File

@@ -1,7 +1,7 @@
/*
* uhttpd - Tiny single-threaded httpd - CGI handler
*
* Copyright (C) 2010-2011 Jo-Philipp Wich <xm@subsignal.org>
* Copyright (C) 2010-2012 Jo-Philipp Wich <xm@subsignal.org>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -20,25 +20,24 @@
#include "uhttpd-utils.h"
#include "uhttpd-cgi.h"
static struct http_response * uh_cgi_header_parse(char *buf, int len, int *off)
static bool
uh_cgi_header_parse(struct http_response *res, char *buf, int len, int *off)
{
char *bufptr = NULL;
char *hdrname = NULL;
int hdrcount = 0;
int pos = 0;
static struct http_response res;
if (((bufptr = strfind(buf, len, "\r\n\r\n", 4)) != NULL) ||
((bufptr = strfind(buf, len, "\n\n", 2)) != NULL))
{
*off = (int)(bufptr - buf) + ((bufptr[0] == '\r') ? 4 : 2);
memset(&res, 0, sizeof(res));
memset(res, 0, sizeof(*res));
res.statuscode = 200;
res.statusmsg = "OK";
res->statuscode = 200;
res->statusmsg = "OK";
bufptr = &buf[0];
@@ -70,25 +69,30 @@ static struct http_response * uh_cgi_header_parse(char *buf, int len, int *off)
if (pos <= len)
{
if ((hdrcount + 1) < array_size(res.headers))
if ((hdrcount+1) < array_size(res->headers))
{
if (!strcasecmp(hdrname, "Status"))
{
res.statuscode = atoi(bufptr);
res->statuscode = atoi(bufptr);
if (res.statuscode < 100)
res.statuscode = 200;
if (res->statuscode < 100)
res->statuscode = 200;
if (((bufptr = strchr(bufptr, ' ')) != NULL) &&
(&bufptr[1] != 0))
{
res.statusmsg = &bufptr[1];
res->statusmsg = &bufptr[1];
}
D("CGI: HTTP/1.x %03d %s\n",
res->statuscode, res->statusmsg);
}
else
{
res.headers[hdrcount++] = hdrname;
res.headers[hdrcount++] = bufptr;
D("CGI: HTTP: %s: %s\n", hdrname, bufptr);
res->headers[hdrcount++] = hdrname;
res->headers[hdrcount++] = bufptr;
}
bufptr = &buf[pos];
@@ -96,16 +100,16 @@ static struct http_response * uh_cgi_header_parse(char *buf, int len, int *off)
}
else
{
return NULL;
return false;
}
}
}
}
return &res;
return true;
}
return NULL;
return false;
}
static char * uh_cgi_header_lookup(struct http_response *res,
@@ -122,485 +126,443 @@ static char * uh_cgi_header_lookup(struct http_response *res,
return NULL;
}
static int uh_cgi_error_500(struct client *cl, struct http_request *req,
const char *message)
static void uh_cgi_shutdown(struct uh_cgi_state *state)
{
if (uh_http_sendf(cl, NULL,
"HTTP/%.1f 500 Internal Server Error\r\n"
"Content-Type: text/plain\r\n%s\r\n",
req->version,
(req->version > 1.0)
? "Transfer-Encoding: chunked\r\n" : "") >= 0)
{
return uh_http_send(cl, req, message, -1);
}
return -1;
close(state->rfd);
close(state->wfd);
free(state);
}
void uh_cgi_request(struct client *cl, struct http_request *req,
struct path_info *pi, struct interpreter *ip)
static bool uh_cgi_socket_cb(struct client *cl)
{
int i, hdroff, bufoff, rv;
int hdrlen = 0;
int buflen = 0;
int fd_max = 0;
int content_length = 0;
int header_sent = 0;
int i, len, hdroff;
char buf[UH_LIMIT_MSGHEAD];
struct uh_cgi_state *state = (struct uh_cgi_state *)cl->priv;
struct http_response *res = &state->cl->response;
struct http_request *req = &state->cl->request;
/* there is unread post data waiting */
while (state->content_length > 0)
{
/* remaining data in http head buffer ... */
if (state->cl->httpbuf.len > 0)
{
len = min(state->content_length, state->cl->httpbuf.len);
D("CGI: Child(%d) feed %d HTTP buffer bytes\n",
state->cl->proc.pid, len);
memcpy(buf, state->cl->httpbuf.ptr, len);
state->cl->httpbuf.len -= len;
state->cl->httpbuf.ptr +=len;
}
/* read it from socket ... */
else
{
len = uh_tcp_recv(state->cl, buf,
min(state->content_length, sizeof(buf)));
if ((len < 0) && ((errno == EAGAIN) || (errno == EWOULDBLOCK)))
break;
D("CGI: Child(%d) feed %d/%d TCP socket bytes\n",
state->cl->proc.pid, len,
min(state->content_length, sizeof(buf)));
}
if (len)
state->content_length -= len;
else
state->content_length = 0;
/* ... write to CGI process */
len = uh_raw_send(state->wfd, buf, len,
cl->server->conf->script_timeout);
}
/* try to read data from child */
while ((len = uh_raw_recv(state->rfd, buf, sizeof(buf), -1)) > 0)
{
/* we have not pushed out headers yet, parse input */
if (!state->header_sent)
{
/* try to parse header ... */
memcpy(state->httpbuf, buf, len);
if (uh_cgi_header_parse(res, state->httpbuf, len, &hdroff))
{
/* write status */
ensure_out(uh_http_sendf(state->cl, NULL,
"HTTP/%.1f %03d %s\r\n"
"Connection: close\r\n",
req->version, res->statuscode, res->statusmsg));
/* add Content-Type if no Location or Content-Type */
if (!uh_cgi_header_lookup(res, "Location") &&
!uh_cgi_header_lookup(res, "Content-Type"))
{
ensure_out(uh_http_send(state->cl, NULL,
"Content-Type: text/plain\r\n", -1));
}
/* if request was HTTP 1.1 we'll respond chunked */
if ((req->version > 1.0) &&
!uh_cgi_header_lookup(res, "Transfer-Encoding"))
{
ensure_out(uh_http_send(state->cl, NULL,
"Transfer-Encoding: chunked\r\n", -1));
}
/* write headers from CGI program */
foreach_header(i, res->headers)
{
ensure_out(uh_http_sendf(state->cl, NULL, "%s: %s\r\n",
res->headers[i], res->headers[i+1]));
}
/* terminate header */
ensure_out(uh_http_send(state->cl, NULL, "\r\n", -1));
state->header_sent = true;
/* push out remaining head buffer */
if (hdroff < len)
{
D("CGI: Child(%d) relaying %d rest bytes\n",
state->cl->proc.pid, len - hdroff);
ensure_out(uh_http_send(state->cl, req,
&buf[hdroff], len - hdroff));
}
}
/* ... failed and head buffer exceeded */
else
{
/* I would do this ...
*
* uh_cgi_error_500(cl, req,
* "The CGI program generated an "
* "invalid response:\n\n");
*
* ... but in order to stay as compatible as possible,
* treat whatever we got as text/plain response and
* build the required headers here.
*/
ensure_out(uh_http_sendf(state->cl, NULL,
"HTTP/%.1f 200 OK\r\n"
"Content-Type: text/plain\r\n"
"%s\r\n",
req->version, (req->version > 1.0)
? "Transfer-Encoding: chunked\r\n" : ""
));
state->header_sent = true;
D("CGI: Child(%d) relaying %d invalid bytes\n",
state->cl->proc.pid, len);
ensure_out(uh_http_send(state->cl, req, buf, len));
}
}
else
{
/* headers complete, pass through buffer to socket */
D("CGI: Child(%d) relaying %d normal bytes\n",
state->cl->proc.pid, len);
ensure_out(uh_http_send(state->cl, req, buf, len));
}
}
/* child has been marked dead by timeout or child handler, bail out */
if (false && cl->dead)
{
D("CGI: Child(%d) is marked dead, returning\n", state->cl->proc.pid);
goto out;
}
if ((len == 0) ||
((errno != EAGAIN) && (errno != EWOULDBLOCK) && (len == -1)))
{
D("CGI: Child(%d) presumed dead [%s]\n",
state->cl->proc.pid, strerror(errno));
goto out;
}
return true;
out:
if (!state->header_sent)
{
if (state->cl->timeout.pending)
uh_http_sendhf(state->cl, 502, "Bad Gateway",
"The CGI process did not produce any response\n");
else
uh_http_sendhf(state->cl, 504, "Gateway Timeout",
"The CGI process took too long to produce a "
"response\n");
}
else
{
uh_http_send(state->cl, req, "", 0);
}
uh_cgi_shutdown(state);
return false;
}
bool uh_cgi_request(struct client *cl, struct path_info *pi,
struct interpreter *ip)
{
int i;
int rfd[2] = { 0, 0 };
int wfd[2] = { 0, 0 };
char buf[UH_LIMIT_MSGHEAD];
char hdr[UH_LIMIT_MSGHEAD];
pid_t child;
fd_set reader;
fd_set writer;
sigset_t ss;
struct sigaction sa;
struct timeval timeout;
struct http_response *res;
struct uh_cgi_state *state;
struct http_request *req = &cl->request;
/* allocate state */
if (!(state = malloc(sizeof(*state))))
{
uh_http_sendhf(cl, 500, "Internal Server Error", "Out of memory");
return false;
}
/* spawn pipes for me->child, child->me */
if ((pipe(rfd) < 0) || (pipe(wfd) < 0))
{
uh_http_sendhf(cl, 500, "Internal Server Error",
"Failed to create pipe: %s", strerror(errno));
if (rfd[0] > 0) close(rfd[0]);
if (rfd[1] > 0) close(rfd[1]);
if (wfd[0] > 0) close(wfd[0]);
if (wfd[1] > 0) close(wfd[1]);
return;
uh_http_sendhf(cl, 500, "Internal Server Error",
"Failed to create pipe: %s\n", strerror(errno));
return false;
}
/* fork off child process */
switch ((child = fork()))
{
/* oops */
case -1:
uh_http_sendhf(cl, 500, "Internal Server Error",
"Failed to fork child: %s", strerror(errno));
return;
/* oops */
case -1:
uh_http_sendhf(cl, 500, "Internal Server Error",
"Failed to fork child: %s\n", strerror(errno));
/* exec child */
case 0:
/* unblock signals */
sigemptyset(&ss);
sigprocmask(SIG_SETMASK, &ss, NULL);
return false;
/* restore SIGTERM */
sa.sa_flags = 0;
sa.sa_handler = SIG_DFL;
sigemptyset(&sa.sa_mask);
sigaction(SIGTERM, &sa, NULL);
/* close loose pipe ends */
close(rfd[0]);
close(wfd[1]);
/* patch stdout and stdin to pipes */
dup2(rfd[1], 1);
dup2(wfd[0], 0);
/* avoid leaking our pipe into child-child processes */
fd_cloexec(rfd[1]);
fd_cloexec(wfd[0]);
/* check for regular, world-executable file _or_ interpreter */
if (((pi->stat.st_mode & S_IFREG) &&
(pi->stat.st_mode & S_IXOTH)) || (ip != NULL))
{
/* build environment */
clearenv();
/* common information */
setenv("GATEWAY_INTERFACE", "CGI/1.1", 1);
setenv("SERVER_SOFTWARE", "uHTTPd", 1);
setenv("PATH", "/sbin:/usr/sbin:/bin:/usr/bin", 1);
#ifdef HAVE_TLS
/* https? */
if (cl->tls)
setenv("HTTPS", "on", 1);
/* exec child */
case 0:
#ifdef DEBUG
sleep(atoi(getenv("UHTTPD_SLEEP_ON_FORK") ?: "0"));
#endif
/* addresses */
setenv("SERVER_NAME", sa_straddr(&cl->servaddr), 1);
setenv("SERVER_ADDR", sa_straddr(&cl->servaddr), 1);
setenv("SERVER_PORT", sa_strport(&cl->servaddr), 1);
setenv("REMOTE_HOST", sa_straddr(&cl->peeraddr), 1);
setenv("REMOTE_ADDR", sa_straddr(&cl->peeraddr), 1);
setenv("REMOTE_PORT", sa_strport(&cl->peeraddr), 1);
/* close loose pipe ends */
close(rfd[0]);
close(wfd[1]);
/* path information */
setenv("SCRIPT_NAME", pi->name, 1);
setenv("SCRIPT_FILENAME", pi->phys, 1);
setenv("DOCUMENT_ROOT", pi->root, 1);
setenv("QUERY_STRING", pi->query ? pi->query : "", 1);
/* patch stdout and stdin to pipes */
dup2(rfd[1], 1);
dup2(wfd[0], 0);
if (pi->info)
setenv("PATH_INFO", pi->info, 1);
/* avoid leaking our pipe into child-child processes */
fd_cloexec(rfd[1]);
fd_cloexec(wfd[0]);
/* REDIRECT_STATUS, php-cgi wants it */
switch (req->redirect_status)
{
case 404:
setenv("REDIRECT_STATUS", "404", 1);
break;
/* check for regular, world-executable file _or_ interpreter */
if (((pi->stat.st_mode & S_IFREG) &&
(pi->stat.st_mode & S_IXOTH)) || (ip != NULL))
{
/* build environment */
clearenv();
default:
setenv("REDIRECT_STATUS", "200", 1);
break;
}
/* common information */
setenv("GATEWAY_INTERFACE", "CGI/1.1", 1);
setenv("SERVER_SOFTWARE", "uHTTPd", 1);
setenv("PATH", "/sbin:/usr/sbin:/bin:/usr/bin", 1);
/* http version */
if (req->version > 1.0)
setenv("SERVER_PROTOCOL", "HTTP/1.1", 1);
else
setenv("SERVER_PROTOCOL", "HTTP/1.0", 1);
#ifdef HAVE_TLS
/* https? */
if (cl->tls)
setenv("HTTPS", "on", 1);
#endif
/* request method */
switch (req->method)
{
case UH_HTTP_MSG_GET:
setenv("REQUEST_METHOD", "GET", 1);
break;
/* addresses */
setenv("SERVER_NAME", sa_straddr(&cl->servaddr), 1);
setenv("SERVER_ADDR", sa_straddr(&cl->servaddr), 1);
setenv("SERVER_PORT", sa_strport(&cl->servaddr), 1);
setenv("REMOTE_HOST", sa_straddr(&cl->peeraddr), 1);
setenv("REMOTE_ADDR", sa_straddr(&cl->peeraddr), 1);
setenv("REMOTE_PORT", sa_strport(&cl->peeraddr), 1);
case UH_HTTP_MSG_HEAD:
setenv("REQUEST_METHOD", "HEAD", 1);
break;
/* path information */
setenv("SCRIPT_NAME", pi->name, 1);
setenv("SCRIPT_FILENAME", pi->phys, 1);
setenv("DOCUMENT_ROOT", pi->root, 1);
setenv("QUERY_STRING", pi->query ? pi->query : "", 1);
case UH_HTTP_MSG_POST:
setenv("REQUEST_METHOD", "POST", 1);
break;
}
if (pi->info)
setenv("PATH_INFO", pi->info, 1);
/* request url */
setenv("REQUEST_URI", req->url, 1);
/* REDIRECT_STATUS, php-cgi wants it */
switch (req->redirect_status)
{
case 404:
setenv("REDIRECT_STATUS", "404", 1);
break;
/* remote user */
if (req->realm)
setenv("REMOTE_USER", req->realm->user, 1);
/* request message headers */
foreach_header(i, req->headers)
{
if (!strcasecmp(req->headers[i], "Accept"))
setenv("HTTP_ACCEPT", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "Accept-Charset"))
setenv("HTTP_ACCEPT_CHARSET", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "Accept-Encoding"))
setenv("HTTP_ACCEPT_ENCODING", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "Accept-Language"))
setenv("HTTP_ACCEPT_LANGUAGE", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "Authorization"))
setenv("HTTP_AUTHORIZATION", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "Connection"))
setenv("HTTP_CONNECTION", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "Cookie"))
setenv("HTTP_COOKIE", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "Host"))
setenv("HTTP_HOST", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "Referer"))
setenv("HTTP_REFERER", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "User-Agent"))
setenv("HTTP_USER_AGENT", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "Content-Type"))
setenv("CONTENT_TYPE", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "Content-Length"))
setenv("CONTENT_LENGTH", req->headers[i+1], 1);
}
/* execute child code ... */
if (chdir(pi->root))
perror("chdir()");
if (ip != NULL)
execl(ip->path, ip->path, pi->phys, NULL);
else
execl(pi->phys, pi->phys, NULL);
/* in case it fails ... */
printf("Status: 500 Internal Server Error\r\n\r\n"
"Unable to launch the requested CGI program:\n"
" %s: %s\n",
ip ? ip->path : pi->phys, strerror(errno));
default:
setenv("REDIRECT_STATUS", "200", 1);
break;
}
/* 403 */
/* http version */
if (req->version > 1.0)
setenv("SERVER_PROTOCOL", "HTTP/1.1", 1);
else
setenv("SERVER_PROTOCOL", "HTTP/1.0", 1);
/* request method */
switch (req->method)
{
printf("Status: 403 Forbidden\r\n\r\n"
"Access to this resource is forbidden\n");
case UH_HTTP_MSG_GET:
setenv("REQUEST_METHOD", "GET", 1);
break;
case UH_HTTP_MSG_HEAD:
setenv("REQUEST_METHOD", "HEAD", 1);
break;
case UH_HTTP_MSG_POST:
setenv("REQUEST_METHOD", "POST", 1);
break;
}
close(wfd[0]);
close(rfd[1]);
exit(0);
/* request url */
setenv("REQUEST_URI", req->url, 1);
break;
/* remote user */
if (req->realm)
setenv("REMOTE_USER", req->realm->user, 1);
/* parent; handle I/O relaying */
default:
/* close unneeded pipe ends */
close(rfd[1]);
close(wfd[0]);
/* max watch fd */
fd_max = max(rfd[0], wfd[1]) + 1;
/* find content length */
if (req->method == UH_HTTP_MSG_POST)
/* request message headers */
foreach_header(i, req->headers)
{
foreach_header(i, req->headers)
{
if (!strcasecmp(req->headers[i], "Content-Length"))
{
content_length = atoi(req->headers[i+1]);
break;
}
}
if (!strcasecmp(req->headers[i], "Accept"))
setenv("HTTP_ACCEPT", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "Accept-Charset"))
setenv("HTTP_ACCEPT_CHARSET", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "Accept-Encoding"))
setenv("HTTP_ACCEPT_ENCODING", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "Accept-Language"))
setenv("HTTP_ACCEPT_LANGUAGE", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "Authorization"))
setenv("HTTP_AUTHORIZATION", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "Connection"))
setenv("HTTP_CONNECTION", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "Cookie"))
setenv("HTTP_COOKIE", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "Host"))
setenv("HTTP_HOST", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "Referer"))
setenv("HTTP_REFERER", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "User-Agent"))
setenv("HTTP_USER_AGENT", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "Content-Type"))
setenv("CONTENT_TYPE", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "Content-Length"))
setenv("CONTENT_LENGTH", req->headers[i+1], 1);
}
memset(hdr, 0, sizeof(hdr));
/* execute child code ... */
if (chdir(pi->root))
perror("chdir()");
/* I/O loop, watch our pipe ends and dispatch child reads/writes from/to socket */
while (1)
if (ip != NULL)
execl(ip->path, ip->path, pi->phys, NULL);
else
execl(pi->phys, pi->phys, NULL);
/* in case it fails ... */
printf("Status: 500 Internal Server Error\r\n\r\n"
"Unable to launch the requested CGI program:\n"
" %s: %s\n", ip ? ip->path : pi->phys, strerror(errno));
}
/* 403 */
else
{
printf("Status: 403 Forbidden\r\n\r\n"
"Access to this resource is forbidden\n");
}
close(wfd[0]);
close(rfd[1]);
exit(0);
break;
/* parent; handle I/O relaying */
default:
memset(state, 0, sizeof(*state));
state->cl = cl;
state->cl->proc.pid = child;
/* close unneeded pipe ends */
close(rfd[1]);
close(wfd[0]);
D("CGI: Child(%d) created: rfd(%d) wfd(%d)\n", child, rfd[0], wfd[1]);
state->content_length = cl->httpbuf.len;
/* find content length */
if (req->method == UH_HTTP_MSG_POST)
{
foreach_header(i, req->headers)
{
FD_ZERO(&reader);
FD_ZERO(&writer);
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)
if (!strcasecmp(req->headers[i], "Content-Length"))
{
ensure_out(kill(child, 0));
}
/* wait until we can read or write or both */
else if (rv > 0)
{
/* ready to write to cgi program */
if (FD_ISSET(wfd[1], &writer))
{
/* there is unread post data waiting */
if (content_length > 0)
{
/* read it from socket ... */
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)
perror("write()");
content_length -= buflen;
}
/* unexpected eof! */
else
{
if (write(wfd[1], "", 0) < 0)
perror("write()");
content_length = 0;
}
}
/* there is no more post data, close pipe to child's stdin */
else if (content_length > -1)
{
close(wfd[1]);
content_length = -1;
}
}
/* ready to read from cgi program */
if (FD_ISSET(rfd[0], &reader))
{
/* read data from child ... */
if ((buflen = read(rfd[0], buf, sizeof(buf))) > 0)
{
/* we have not pushed out headers yet, parse input */
if (!header_sent)
{
/* head buffer not full and no end yet */
if (hdrlen < sizeof(hdr))
{
bufoff = min(buflen, sizeof(hdr) - hdrlen);
memcpy(&hdr[hdrlen], buf, bufoff);
hdrlen += bufoff;
}
else
{
bufoff = 0;
}
/* try to parse header ... */
if ((res = uh_cgi_header_parse(hdr, hdrlen, &hdroff)) != NULL)
{
/* write status */
ensure_out(uh_http_sendf(cl, NULL,
"HTTP/%.1f %03d %s\r\n"
"Connection: close\r\n",
req->version, res->statuscode,
res->statusmsg));
/* add Content-Type if no Location or Content-Type */
if( !uh_cgi_header_lookup(res, "Location") &&
!uh_cgi_header_lookup(res, "Content-Type")
) {
ensure_out(uh_http_send(cl, NULL,
"Content-Type: text/plain\r\n", -1));
}
/* if request was HTTP 1.1 we'll respond chunked */
if( (req->version > 1.0) &&
!uh_cgi_header_lookup(res, "Transfer-Encoding")
) {
ensure_out(uh_http_send(cl, NULL,
"Transfer-Encoding: chunked\r\n", -1));
}
/* write headers from CGI program */
foreach_header(i, res->headers)
{
ensure_out(uh_http_sendf(cl, NULL, "%s: %s\r\n",
res->headers[i], res->headers[i+1]));
}
/* terminate header */
ensure_out(uh_http_send(cl, NULL, "\r\n", -1));
/* push out remaining head buffer */
if (hdroff < hdrlen)
ensure_out(uh_http_send(cl, req, &hdr[hdroff], hdrlen - hdroff));
}
/* ... failed and head buffer exceeded */
else if (hdrlen >= sizeof(hdr))
{
ensure_out(uh_cgi_error_500(cl, req,
"The CGI program generated an invalid response:\n\n"));
ensure_out(uh_http_send(cl, req, hdr, hdrlen));
}
/* ... failed but free buffer space, try again */
else
{
continue;
}
/* push out remaining read buffer */
if (bufoff < buflen)
ensure_out(uh_http_send(cl, req, &buf[bufoff], buflen - bufoff));
header_sent = 1;
continue;
}
/* headers complete, pass through buffer to socket */
ensure_out(uh_http_send(cl, req, buf, buflen));
}
/* looks like eof from child */
else
{
/* cgi script did not output useful stuff at all */
if (!header_sent)
{
/* I would do this ...
*
* uh_cgi_error_500(cl, req,
* "The CGI program generated an "
* "invalid response:\n\n");
*
* ... but in order to stay as compatible as possible,
* treat whatever we got as text/plain response and
* build the required headers here.
*/
ensure_out(uh_http_sendf(cl, NULL,
"HTTP/%.1f 200 OK\r\n"
"Content-Type: text/plain\r\n"
"%s\r\n",
req->version, (req->version > 1.0)
? "Transfer-Encoding: chunked\r\n" : ""
));
ensure_out(uh_http_send(cl, req, hdr, hdrlen));
}
/* send final chunk if we're in chunked transfer mode */
ensure_out(uh_http_send(cl, req, "", 0));
break;
}
}
}
/* timeout exceeded or interrupted by SIGCHLD */
else
{
if ((errno != EINTR) && ! header_sent)
{
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_out(uh_http_send(cl, req, "", 0));
state->content_length = atoi(req->headers[i+1]);
break;
}
}
}
out:
close(rfd[0]);
close(wfd[1]);
state->rfd = rfd[0];
fd_nonblock(state->rfd);
if (!kill(child, 0))
{
kill(child, SIGTERM);
waitpid(child, NULL, 0);
}
state->wfd = wfd[1];
fd_nonblock(state->wfd);
break;
cl->cb = uh_cgi_socket_cb;
cl->priv = state;
break;
}
return true;
}