X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/b7a49ee36479a00208ee80343fc3fc2be2da92fb..5304b20c55fd2db8f4f414f1fc0c017006e0ee7c:/IkiWiki/Wrapper.pm
diff --git a/IkiWiki/Wrapper.pm b/IkiWiki/Wrapper.pm
index 4fe2d8111..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));
}
@@ -49,8 +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_HOST SERVER_PORT HTTPS HTTP_ACCEPT
REDIRECT_URL} if $config{cgi};
+ my $envsize=$#envsave;
my $envsave="";
foreach my $var (@envsave) {
$envsave.=<<"EOF";
@@ -58,6 +60,18 @@ sub gen_wrapper () {
addenv("$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->() });
@@ -93,12 +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%s%s
",
+ 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
}
@@ -129,15 +184,28 @@ EOF
#include
extern char **environ;
-char *newenviron[$#envsave+7];
+char *newenviron[$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) {
@@ -214,7 +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"));