Merge pull request #3740 from stilez/patch-59

1 files changed, 59 insertions, 12 deletions

diff --git a/src/usr/local/www/diag_command.php b/src/usr/local/www/diag_command.php
index bac4848..6e4e78e 100755
--- a/src/usr/local/www/diag_command.php
+++ b/src/usr/local/www/diag_command.php
@@ -255,34 +255,81 @@ if ($_POST['submit'] == "EXEC" && !isBlank($_POST['txtCommand'])):?>
 		</div>
 	</div>
 <?php
+	
 	// Experimental version. Writes the user's php code to a file and executes it via a new instance of PHP
 	// This is intended to prevent bad code from breaking the GUI
 	if ($_POST['submit'] == "EXECPHP" && !isBlank($_POST['txtPHPCommand'])) {
-		puts("<div class=\"panel panel-success responsive\"><div class=\"panel-heading\"><h2 class=\"panel-title\">PHP Response</h2></div>");
 
-		$tmpname = tempnam("/tmp", "");
-		$phpfile = fopen($tmpname, "w");
-		fwrite($phpfile, "<?php\n");
-		fwrite($phpfile, "require_once(\"/etc/inc/config.inc\");\n");
-		fwrite($phpfile, "require_once(\"/etc/inc/functions.inc\");\n\n");
-		fwrite($phpfile, $_POST['txtPHPCommand'] . "\n");
-		fwrite($phpfile, "?>\n");
-		fclose($phpfile);
+		safe_mkdir($g[tmp_path_user_code]);     //create if doesn't exist
+		$tmpfile = tempnam($g[tmp_path_user_code], "");
+		$phpcode = <<<END_FILE
+<?php
+require_once("/etc/inc/config.inc");
+require_once("/etc/inc/functions.inc");
 
-		$output = array();
-		exec("/usr/local/bin/php -d log_errors=off " . $tmpname, $output);
+// USER CODE STARTS HERE:
 
-		unlink($tmpname);
+%s
+?>
+END_FILE;
+		$lineno_correction = 6;  // line numbering correction, this should be the number of lines added above, BEFORE the user's code
+
+		file_put_contents($tmpfile, sprintf($phpcode, $_POST['txtPHPCommand']));
+
+		$output = $matches = array();
+		$retval = 0;
+		exec("/usr/local/bin/php -d log_errors=off {$tmpfile}", $output, $retval);
+
+		puts('<div class="panel panel-success responsive"><div class="panel-heading"><h2 class="panel-title">PHP Response</h2></div>');
+
+		// Help user to find bad code line, if it gave an error
+		$errmsg_found = preg_match("`error.*:.* (?:in|File:) {$tmpfile}(?:\(| on line |, Line: )(\d+)(?:, Message:|\).* eval\(\)'d code|$)`i", implode("\n", $output), $matches);
+		if ($retval || $errmsg_found) {
+			/* Trap failed code - test both retval and output message
+			 * Typical messages as at 2.3.x:
+			 *   "Parse error: syntax error, ERR_DETAILS in FILE on line NN"
+			 *   "PHP ERROR: Type: NN, File: FILE, Line: NN, Message: ERR_DETAILS" 
+			 *   "Parse error: syntax error, unexpected end of file in FILE(NN) : eval()'d code on line 1" [the number in (..) is the error line]
+			*/
+			if ($matches[1] > $lineno_correction) {
+				$errline = $matches[1] - $lineno_correction;
+				$errtext = sprintf(gettext('Line %s appears to have generated an error, and has been highlighted. The full response is below.'), $errline);
+			} else {
+				$errline = -1;
+				$errtext = gettext('The code appears to have generated an error, but the line responsible cannot be identified. The full response is below.');
+			}
+			$errtext .= '<br/>' . sprintf(gettext('Note that the line number in the full PHP response will be %s lines too large. Nested code and eval() errors may incorrectly point to "line 1".'), $lineno_correction);
+			$syntax_output = array();
+			$html = "";
+			exec("/usr/local/bin/php -s -d log_errors=off {$tmpfile}", $syntax_output);
+			// Lines 0, 2 and 3 are CSS wrapper for the syntax highlighted code which is at line 1 <br> separated.
+			$syntax_output = explode("<br />", $syntax_output[1]);
+			$margin_layout = '%3s %' . strlen(count($syntax_output)) . 'd:';
+			for ($lineno = 1; $lineno < count($syntax_output) - $lineno_correction; $lineno++) {
+				$margin = str_replace(' ', '&nbsp;', sprintf($margin_layout, ($lineno == $errline ? '&gt;&gt;&gt;' : ''), $lineno));
+				$html .= "<span style='color:black;backgroundcolor:lightgrey'><tt>{$margin}</tt></span>&nbsp;&nbsp;{$syntax_output[$lineno + $lineno_correction - 1]}<br/>\n";
+			}
+			print_info_box($errtext, 'danger');
+			print "<div style='margin:20px'><b>" . gettext("Error locator:") . "</b>\n";
+			print "<div id='errdiv' style='height:7em; width:60%; overflow:auto; white-space: nowrap; border:darkgrey solid 1px; margin-top: 20px'>\n";
+			print $html . "\n</div></div>\n";
+		}
 
 		$output = implode("\n", $output);
 		print("<pre>" . htmlspecialchars($output) . "</pre>");
 
 //		echo eval($_POST['txtPHPCommand']);
+
 		puts("</div>");
+
+		unlink($tmpfile);
 ?>
 <script type="text/javascript">
 //<![CDATA[
 	events.push(function() {
+		// scroll error locator if needed (does nothing if no error)
+		$('#errdiv').scrollTop(<?=max($errline - ($lineno_correction - 3.5), 0);?> * parseFloat($('#errdiv').css('line-height')));
+
 		// Scroll to the bottom of the page to more easily see the results of a PHP exec command
 		$("html, body").animate({ scrollTop: $(document).height() }, 1000);
 	});