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Added base64 image extraction to markdown page content

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- Included tests to cover.
- Manually tested via API update and interface page update.

Closes #2898
This commit is contained in:
Dan Brown 2021-10-18 11:42:50 +01:00
parent 6e325de226
commit cb45c53029
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GPG Key ID: 46D9F943C24A2EF9
4 changed files with 86 additions and 7 deletions
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2
app/Entities/Models/Page.php
View File

@ -28,7 +28,7 @@ class Page extends BookChild
public static $listAttributes = ['name', 'id', 'slug', 'book_id', 'chapter_id', 'draft', 'template', 'text', 'created_at', 'updated_at', 'priority'];
public static $contentAttributes = ['name', 'id', 'slug', 'book_id', 'chapter_id', 'draft', 'template', 'html', 'text', 'created_at', 'updated_at', 'priority'];
protected $fillable = ['name', 'priority', 'markdown'];
protected $fillable = ['name', 'priority'];
public $textField = 'text';

43
app/Entities/Tools/PageContent.php
View File

@ -37,7 +37,7 @@ class PageContent
*/
public function setNewHTML(string $html)
{
$html = $this->extractBase64Images($this->page, $html);
$html = $this->extractBase64ImagesFromHtml($html);
$this->page->html = $this->formatHtml($html);
$this->page->text = $this->toPlainText();
$this->page->markdown = '';
@ -48,6 +48,7 @@ class PageContent
*/
public function setNewMarkdown(string $markdown)
{
$markdown = $this->extractBase64ImagesFromMarkdown($markdown);
$this->page->markdown = $markdown;
$html = $this->markdownToHtml($markdown);
$this->page->html = $this->formatHtml($html);
@ -74,7 +75,7 @@ class PageContent
/**
* Convert all base64 image data to saved images.
*/
public function extractBase64Images(Page $page, string $htmlText): string
protected function extractBase64ImagesFromHtml(string $htmlText): string
{
if (empty($htmlText) || strpos($htmlText, 'data:image') === false) {
return $htmlText;
@ -86,7 +87,6 @@ class PageContent
$childNodes = $body->childNodes;
$xPath = new DOMXPath($doc);
$imageRepo = app()->make(ImageRepo::class);
$allowedExtensions = ['jpg', 'jpeg', 'png', 'gif', 'webp'];
// Get all img elements with image data blobs
$imageNodes = $xPath->query('//img[contains(@src, \'data:image\')]');
@ -96,7 +96,7 @@ class PageContent
$extension = strtolower(preg_split('/[\/;]/', $dataDefinition)[1] ?? 'png');
// Validate extension
if (!in_array($extension, $allowedExtensions)) {
if (!$imageRepo->imageExtensionSupported($extension)) {
$imageNode->setAttribute('src', '');
continue;
}
@ -105,7 +105,7 @@ class PageContent
$imageName = 'embedded-image-' . Str::random(8) . '.' . $extension;
try {
$image = $imageRepo->saveNewFromData($imageName, base64_decode($base64ImageData), 'gallery', $page->id);
$image = $imageRepo->saveNewFromData($imageName, base64_decode($base64ImageData), 'gallery', $this->page->id);
$imageNode->setAttribute('src', $image->url);
} catch (ImageUploadException $exception) {
$imageNode->setAttribute('src', '');
@ -121,6 +121,39 @@ class PageContent
return $html;
}
/**
* Convert all inline base64 content to uploaded image files.
*/
protected function extractBase64ImagesFromMarkdown(string $markdown)
{
$imageRepo = app()->make(ImageRepo::class);
$matches = [];
preg_match_all('/!\[.*?]\(.*?(data:image\/.*?)[)"\s]/', $markdown, $matches);
foreach ($matches[1] as $base64Match) {
[$dataDefinition, $base64ImageData] = explode(',', $base64Match, 2);
$extension = strtolower(preg_split('/[\/;]/', $dataDefinition)[1] ?? 'png');
// Validate extension
if (!$imageRepo->imageExtensionSupported($extension)) {
$markdown = str_replace($base64Match, '', $markdown);
continue;
}
// Save image from data with a random name
$imageName = 'embedded-image-' . Str::random(8) . '.' . $extension;
try {
$image = $imageRepo->saveNewFromData($imageName, base64_decode($base64ImageData), 'gallery', $this->page->id);
$markdown = str_replace($base64Match, $image->url, $markdown);
} catch (ImageUploadException $exception) {
$markdown = str_replace($base64Match, '', $markdown);
}
}
return $markdown;
}
/**
* Formats a page's html to be tagged correctly within the system.
*/

10
app/Uploads/ImageRepo.php
View File

@ -16,6 +16,8 @@ class ImageRepo
protected $restrictionService;
protected $page;
protected static $supportedExtensions = ['jpg', 'jpeg', 'png', 'gif', 'webp'];
/**
* ImageRepo constructor.
*/
@ -31,6 +33,14 @@ class ImageRepo
$this->page = $page;
}
/**
* Check if the given image extension is supported by BookStack.
*/
public function imageExtensionSupported(string $extension): bool
{
return in_array(trim($extension, '. \t\n\r\0\x0B'), static::$supportedExtensions);
}
/**
* Get an image with the given id.
*/

38
tests/Entity/PageContentTest.php
View File

@ -594,7 +594,7 @@ class PageContentTest extends TestCase
$this->deleteImage($imagePath);
}
public function test_base64_images_blanked_if_not_supported_extension_for_extract()
public function test_base64_images_within_html_blanked_if_not_supported_extension_for_extract()
{
$this->asEditor();
$page = Page::query()->first();
@ -607,4 +607,40 @@ class PageContentTest extends TestCase
$page->refresh();
$this->assertStringContainsString('<img src=""', $page->html);
}
public function test_base64_images_get_extracted_from_markdown_page_content()
{
$this->asEditor();
$page = Page::query()->first();
$this->put($page->getUrl(), [
'name' => $page->name, 'summary' => '',
'markdown' => 'test ![test](data:image/jpeg;base64,' . $this->base64Jpeg . ')',
]);
$page->refresh();
$this->assertStringMatchesFormat('%A<p%A>test <img src="http://localhost/uploads/images/gallery/%A.jpeg" alt="test">%A</p>%A', $page->html);
$matches = [];
preg_match('/src="http:\/\/localhost(.*?)"/', $page->html, $matches);
$imagePath = $matches[1];
$imageFile = public_path($imagePath);
$this->assertEquals(base64_decode($this->base64Jpeg), file_get_contents($imageFile));
$this->deleteImage($imagePath);
}
public function test_base64_images_within_markdown_blanked_if_not_supported_extension_for_extract()
{
$this->asEditor();
$page = Page::query()->first();
$this->put($page->getUrl(), [
'name' => $page->name, 'summary' => '',
'markdown' => 'test ![test](data:image/jiff;base64,' . $this->base64Jpeg . ')',
]);
$page->refresh();
$this->assertStringContainsString('<img src=""', $page->html);
}
}