Force output buffers to be flushed, if they're turned on.

If output buffering is turned on, PHP can be a bit slack about sending
the data to the client before closing the connection with exit(). These
changes ensure we call ob_flush() before we leave.  We call @ob_flush()
so we don't get noisy warnings when output buffering is off...

htdocs/admin.php

@@ -24,7 +24,7 @@ if ( ! @include_once( $code_file ) ) {
   $c->messages[] = sprintf('No page found to %s %s%s%s', $action, ($action == 'browse' ? '' : 'a '), $component, ($action == 'browse' ? 's' : ''));
   include('page-header.php');
   include('page-footer.php');
-  exit(0);
+  @ob_flush(); exit(0);
 }
 
 include('page-header.php');

htdocs/always.php

@@ -26,6 +26,7 @@ function early_exception_handler($e) {
   foreach( $trace AS $k => $v ) {
     printf( "%s[%d] %s%s%s()\n", $v['file'], $v['line'], (isset($v['class'])?$v['class']:''), (isset($v['type'])?$v['type']:''), (isset($v['function'])?$v['function']:'') );
   }
+  @ob_flush();
 }
 set_exception_handler('early_exception_handler');
 
@@ -89,7 +90,7 @@ if ( ! @include_once('AWLUtilities.php') ) {
   }
   if ( ! @include_once('AWLUtilities.php') ) {
     echo "Could not find the AWL libraries. Are they installed? Check your include_path in php.ini!\n";
-    exit;
+    @ob_flush(); exit(0);
   }
 }
 
@@ -145,7 +146,7 @@ else if ( @file_exists('config/config.php') ) {
 }
 else {
   include('davical_configuration_missing.php');
-  exit;
+  @ob_flush();  exit(0);
 }
 $config_warnings = trim(ob_get_contents());
 ob_end_clean();

htdocs/caldav.php

@@ -17,17 +17,17 @@ if ( isset($_SERVER['PATH_INFO']) && preg_match( '{^(/favicon.ico|davical.css|(i
   else {
     fpassthru($fh);
   }
-  exit(0);
+  @ob_flush(); exit(0);
 }
 require_once('./always.php');
 
 if ( isset($_SERVER['PATH_INFO']) && preg_match( '{^/\.well-known/(.+)$}', $_SERVER['PATH_INFO'], $matches ) ) {
   require ('well-known.php');
-  exit(0);
+  @ob_flush(); exit(0);
 }
 elseif ( isset($_SERVER['PATH_INFO']) && $_SERVER['PATH_INFO'] == '/autodiscover/autodiscover.xml' ) {
   require ('autodiscover-handler.php');
-  exit(0);
+  @ob_flush(); exit(0);
 }
 
 function logRequestHeaders() {
@@ -102,7 +102,7 @@ if ( ! ($request->IsPrincipal() || isset($request->collection) || $request->meth
     $redirect_url = ConstructURL('/caldav.php'.$matches[1]);
     dbg_error_log( 'LOG WARNING', 'Redirecting %s for "%s" to "%s"', $request->method, $request->path, $redirect_url );
     header('Location: '.$redirect_url );
-    exit(0);
+    @ob_flush(); exit(0);
   }
 }
 

htdocs/index.php

@@ -4,7 +4,7 @@ if ( $_SERVER['REQUEST_METHOD'] != "GET" && $_SERVER['REQUEST_METHOD'] != "POST"
   * If the request is not a GET or POST then they must really want caldav.php!
   */
   include("./caldav.php");
-  exit;  // Not that it should return from that!
+  @ob_flush(); exit(0);  // Not that it should return from that!
 }
 
 include("./always.php");

htdocs/tools.php

@@ -21,7 +21,7 @@ require_once("caldav-PUT-functions.php");
 include_once('check_UTF8.php');
 
 if ( !$session->AllowedTo("Admin" ) )
-  exit;
+  @ob_flush(); exit(0);
 
 if( function_exists("sync_LDAP") && isset($_POST['Sync_LDAP'])){
   sync_LDAP();

inc/CalDAVRequest.php

@@ -1201,8 +1201,7 @@ EOSQL;
       @dbg_error_log("statistics", "Method: %s, Status: %d, Script: %5.3lfs, Queries: %5.3lfs, URL: %s",
                          $this->method, $status, $script_time, $c->total_query_time, $this->path);
     }
-
-    exit(0);
+    @ob_flush(); exit(0);
   }
 
 }

inc/DAViCalSession.php

@@ -113,7 +113,7 @@ class DAViCalSession extends Session
       || (isset($c->restrict_admin_port) && $c->restrict_admin_port != $_SERVER['SERVER_PORT'] ) ) {
       header('Location: caldav.php');
       dbg_error_log( 'LOG WARNING', 'Access to "%s" via "%s:%d" rejected.', $_SERVER['REQUEST_URI'], $current_domain, $_SERVER['SERVER_PORT'] );
-      exit(0);
+      @ob_flush(); exit(0);
     }
     if ( isset($c->restrict_admin_roles) && $roles == '' ) $roles = $c->restrict_admin_roles;
     if ( $this->logged_in && $roles == '' ) return;
@@ -156,7 +156,7 @@ class DAViCalSession extends Session
     }
 
     include('page-footer.php');
-    exit;
+    @ob_flush(); exit(0);
   }
 }
 

inc/HTTPAuthSession.php

@@ -88,7 +88,7 @@ class HTTPAuthSession {
     header( $auth_header );
     echo 'Please log in for access to this system.';
     dbg_error_log( "HTTPAuth", ":Session: User is not authorised: %s ", $_SERVER['REMOTE_ADDR'] );
-    exit;
+    @ob_flush();   exit(0);
   }
 
 

inc/always.php.in

@@ -26,6 +26,7 @@ function early_exception_handler($e) {
   foreach( $trace AS $k => $v ) {
     printf( "%s[%d] %s%s%s()\n", $v['file'], $v['line'], (isset($v['class'])?$v['class']:''), (isset($v['type'])?$v['type']:''), (isset($v['function'])?$v['function']:'') );
   }
+  @ob_flush();
 }
 set_exception_handler('early_exception_handler');
 
@@ -89,7 +90,7 @@ if ( ! @include_once('AWLUtilities.php') ) {
   }
   if ( ! @include_once('AWLUtilities.php') ) {
     echo "Could not find the AWL libraries. Are they installed? Check your include_path in php.ini!\n";
-    exit;
+    @ob_flush(); exit(0);
   }
 }
 
@@ -145,7 +146,7 @@ else if ( @file_exists('config/config.php') ) {
 }
 else {
   include('davical_configuration_missing.php');
-  exit;
+  @ob_flush();  exit(0);
 }
 $config_warnings = trim(ob_get_contents());
 ob_end_clean();

inc/auth-functions.php

@@ -299,7 +299,7 @@ function AuthExternalAWL( $username, $password ) {
   </body>
   </html>
 EOERRMSG;
-    exit(1);
+    @ob_flush();  exit(1);
   }
 
   if ( $qry->Exec('Login',__LINE__,__FILE__) && $qry->rows() == 1 ) {

inc/autodiscover-handler.php

@@ -14,7 +14,7 @@ $request = new CalDAVRequest();
 
 if ( !isset($c->enable_autodiscover) || ! $c->enable_autodiscover ) {
   $request->DoResponse( 404 );
-  exit(0);
+  exit(0); // unneccessary
 }
 
 $ns_outlook_req_2006 = "http://schemas.microsoft.com/exchange/autodiscover/outlook/requestschema/2006";
@@ -40,7 +40,7 @@ function errorResponse( $code, $message, $debugdata = '' ) {
 ERROR;
 
   $request->DoResponse( $code, $response, 'text/xml; charset="utf-8"' );
-  exit(0);
+  exit(0); // unneccessary
 }
 
 

inc/caldav-PROPPATCH.php

@@ -353,6 +353,5 @@ if ( $qry->Commit() ) {
 * Or it was all crap.
 */
 $request->DoResponse( 500 );
-
-exit(0);
+exit(0); // unneccessary
 

inc/well-known.php

@@ -34,7 +34,7 @@ switch ( $request->path ) {
 if ( $c->enable_scheduling != true )
 {
  $request->DoResponse( 404, translate('The application program does not understand that request.') );
- exit ();
+ // Does not return
 }
 
 header ( 'iSchedule-Version: 1.0' );
@@ -103,5 +103,6 @@ RESPONSE;
     </capability-set>
  </query-result>
 RESPONSE;
- exit ( 0 );
+
+  @ob_flush();   exit(0);
 }