X-Git-Url: https://git.immae.eu/?a=blobdiff_plain;f=src%2FWallabag%2FCoreBundle%2FHelper%2FContentProxy.php;h=ce82f6bc106b2270a304b105af61ca4badd47ceb;hb=7a65c2017bf4dd47414df27d0a07829580392c96;hp=3fe31c2c7d68b9115ab8bb412588270e87993873;hpb=2a1ceb67b4400f46f4d3067e887ff54aa906f0a2;p=github%2Fwallabag%2Fwallabag.git

diff --git a/src/Wallabag/CoreBundle/Helper/ContentProxy.php b/src/Wallabag/CoreBundle/Helper/ContentProxy.php
index 3fe31c2c..ce82f6bc 100644
--- a/src/Wallabag/CoreBundle/Helper/ContentProxy.php
+++ b/src/Wallabag/CoreBundle/Helper/ContentProxy.php
@@ -53,6 +53,7 @@ class ContentProxy
 
         if ((empty($content) || false === $this->validateContent($content)) && false === $disableContentUpdate) {
             $fetchedContent = $this->graby->fetchContent($url);
+            $fetchedContent['title'] = $this->sanitizeContentTitle($fetchedContent['title'], $fetchedContent['content_type']);
 
             // when content is imported, we have information in $content
             // in case fetching content goes bad, we'll keep the imported information instead of overriding them
@@ -68,6 +69,47 @@ class ContentProxy
         $this->stockEntry($entry, $content);
     }
 
+    /**
+     * Try to sanitize the title of the fetched content from wrong character encodings and invalid UTF-8 character.
+     * @param $title
+     * @param $contentType
+     * @return string
+     */
+    private function sanitizeContentTitle($title, $contentType) {
+        if ('application/pdf' === $contentType) {
+            $title = $this->convertPdfEncodingToUTF8($title);
+        }
+        return $this->sanitizeUTF8Text($title);
+    }
+
+    /**
+     * If the title from the fetched content comes from a PDF, then its very possible that the character encoding is not
+     * UTF-8. This methods tries to identify the character encoding and translate the title to UTF-8.
+     * @param $title
+     * @return string (maybe contains invalid UTF-8 character)
+     */
+    private function convertPdfEncodingToUTF8($title) {
+        // first try UTF-8 because its easier to detect its present/absence
+        foreach (array('UTF-8', 'UTF-16BE', 'WINDOWS-1252') as $encoding) {
+            if (mb_check_encoding($title, $encoding)) {
+                return mb_convert_encoding($title, 'UTF-8', $encoding);
+            }
+        }
+        return $title;
+    }
+
+    /**
+     * Remove invalid UTF-8 characters from the given string.
+     * @param String $rawText
+     * @return string
+     */
+    private function sanitizeUTF8Text($rawText) {
+        if (mb_check_encoding($rawText, 'UTF-8')) {
+            return $rawText;
+        }
+        return iconv("UTF-8", "UTF-8//IGNORE", $rawText);
+    }
+
     /**
      * Use a Symfony validator to ensure the language is well formatted.
      *