X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/cba6935f55f95b99a177d2cbe9130d6d589e10a8..c7bdebaaf134729356852918b387071c92f85e72:/IkiWiki/Wrapper.pm?ds=sidebyside

diff --git a/IkiWiki/Wrapper.pm b/IkiWiki/Wrapper.pm
index 927368fae..69500029c 100644
--- a/IkiWiki/Wrapper.pm
+++ b/IkiWiki/Wrapper.pm
@@ -28,10 +28,11 @@ sub gen_wrappers () {
 	%config=(%origconfig);
 }
 
+our $program_to_wrap = $0;
 sub gen_wrapper () {
 	$config{srcdir}=File::Spec->rel2abs($config{srcdir});
 	$config{destdir}=File::Spec->rel2abs($config{destdir});
-	my $this=File::Spec->rel2abs($0);
+	my $this=File::Spec->rel2abs($program_to_wrap);
 	if (! -x $this) {
 		error(sprintf(gettext("%s doesn't seem to be executable"), $this));
 	}
@@ -49,7 +50,9 @@ sub gen_wrapper () {
 	push @envsave, qw{REMOTE_ADDR QUERY_STRING REQUEST_METHOD REQUEST_URI
 	               CONTENT_TYPE CONTENT_LENGTH GATEWAY_INTERFACE
 		       HTTP_COOKIE REMOTE_USER HTTPS REDIRECT_STATUS
+		       HTTP_HOST SERVER_PORT HTTPS HTTP_ACCEPT
 		       REDIRECT_URL} if $config{cgi};
+	my $envsize=$#envsave;
 	my $envsave="";
 	foreach my $var (@envsave) {
 		$envsave.=<<"EOF";
@@ -57,6 +60,18 @@ sub gen_wrapper () {
 		addenv("$var", s);
 EOF
 	}
+	if (ref $config{ENV} eq 'HASH') {
+		foreach my $key (keys %{$config{ENV}}) {
+			my $val=$config{ENV}{$key};
+			utf8::encode($val) if utf8::is_utf8($val);
+			$val =~ s/([^A-Za-z0-9])/sprintf '""\\x%02x""', ord($1)/ge;
+			$envsize += 1;
+			$envsave.=<<"EOF";
+	addenv("$key", "$val");
+EOF
+		}
+		delete $config{ENV};
+	}
 	
 	my @wrapper_hooks;
 	run_hooks(genwrapper => sub { push @wrapper_hooks, shift->() });
@@ -92,12 +107,53 @@ EOF
 		# memory, a pile up of processes could cause thrashing
 		# otherwise. The fd of the lock is stored in
 		# IKIWIKI_CGILOCK_FD so unlockwiki can close it.
-		$pre_exec=<<"EOF";
+		#
+		# A lot of cgi wrapper processes can potentially build
+		# up and clog an otherwise unloaded web server. To
+		# partially avoid this, when a GET comes in and the lock
+		# is already held, rather than blocking a html page is
+		# constructed that retries. This is enabled by setting
+		# cgi_overload_delay.
+		if (defined $config{cgi_overload_delay} &&
+		    $config{cgi_overload_delay} =~/^[0-9]+/) {
+			my $i=int($config{cgi_overload_delay});
+			$pre_exec.="#define CGI_OVERLOAD_DELAY $i\n"
+				if $i > 0;
+			my $msg=gettext("Please wait");
+			$msg=~s/"/\\"/g;
+			$pre_exec.='#define CGI_PLEASE_WAIT_TITLE "'.$msg."\"\n";
+			if (defined $config{cgi_overload_message} && length $config{cgi_overload_message}) {
+				$msg=$config{cgi_overload_message};
+				$msg=~s/"/\\"/g;
+			}
+			$pre_exec.='#define CGI_PLEASE_WAIT_BODY "'.$msg."\"\n";
+		}
+		$pre_exec.=<<"EOF";
 	lockfd=open("$config{wikistatedir}/cgilock", O_CREAT | O_RDWR, 0666);
-	if (lockfd != -1 && flock(lockfd, LOCK_EX) == 0) {
-		char *fd_s=malloc(8);
-		sprintf(fd_s, "%i", lockfd);
-		setenv("IKIWIKI_CGILOCK_FD", fd_s, 1);
+	if (lockfd != -1) {
+#ifdef CGI_OVERLOAD_DELAY
+		char *request_method = getenv("REQUEST_METHOD");
+		if (request_method && strcmp(request_method, "GET") == 0) {
+			if (lockf(lockfd, F_TLOCK, 0) == 0) {
+				set_cgilock_fd(lockfd);
+			}
+			else {
+				printf("Content-Type: text/html\\nRefresh: %i; URL=%s\\n\\n<html><head><title>%s</title><head><body><p>%s</p></body></html>",
+					CGI_OVERLOAD_DELAY,
+					getenv("REQUEST_URI"),
+					CGI_PLEASE_WAIT_TITLE,
+					CGI_PLEASE_WAIT_BODY);
+				exit(0);
+			}
+		}
+		else if (lockf(lockfd, F_LOCK, 0) == 0) {
+			set_cgilock_fd(lockfd);
+		}
+#else
+		if (lockf(lockfd, F_LOCK, 0) == 0) {
+			set_cgilock_fd(lockfd);
+		}
+#endif
 	}
 EOF
 	}
@@ -128,15 +184,28 @@ EOF
 #include <sys/file.h>
 
 extern char **environ;
-char *newenviron[$#envsave+6];
+char *newenviron[$envsize+7];
 int i=0;
 
 void addenv(char *var, char *val) {
 	char *s=malloc(strlen(var)+1+strlen(val)+1);
-	if (!s)
+	if (!s) {
 		perror("malloc");
-	sprintf(s, "%s=%s", var, val);
-	newenviron[i++]=s;
+		exit(1);
+	}
+	else {
+		sprintf(s, "%s=%s", var, val);
+		newenviron[i++]=s;
+	}
+}
+
+void set_cgilock_fd (int lockfd) {
+	char fd_s[12];
+	sprintf(fd_s, "%i", lockfd);
+	if (setenv("IKIWIKI_CGILOCK_FD", fd_s, 1) != 0) {
+		perror("setenv");
+		exit(1);
+	}
 }
 
 int main (int argc, char **argv) {
@@ -147,6 +216,7 @@ $check_commit_hook
 @wrapper_hooks
 $envsave
 	newenviron[i++]="HOME=$ENV{HOME}";
+	newenviron[i++]="PATH=$ENV{PATH}";
 	newenviron[i++]="WRAPPED_OPTIONS=$configstring";
 
 #ifdef __TINYC__
@@ -212,7 +282,7 @@ $set_background_command
 EOF
 
 	my @cc=exists $ENV{CC} ? possibly_foolish_untaint($ENV{CC}) : 'cc';
-	push @cc, possibly_foolish_untaint($ENV{CFLAGS}) if exists $ENV{CFLAGS};
+	push @cc, split(' ', possibly_foolish_untaint($ENV{CFLAGS})) if exists $ENV{CFLAGS};
 	if (system(@cc, "$wrapper.c", "-o", "$wrapper.new") != 0) {
 		#translators: The parameter is a C filename.
 		error(sprintf(gettext("failed to compile %s"), "$wrapper.c"));
@@ -235,8 +305,7 @@ EOF
 		error("rename $wrapper.new $wrapper: $!");
 	}
 	#translators: The parameter is a filename.
-	printf(gettext("successfully generated %s"), $wrapper);
-	print "\n";
+	debug(sprintf(gettext("successfully generated %s"), $wrapper));
 }
 
 1