wkhtmltopdf, 0.12.6, Warning: Blocked access to file - wkhtmltopdf

Question

When upgrade wkhtmltopdf to 0.12.6, it came to such messages and the image did not show in the target pdf:
Warning: Blocked access to file /path/to/bpa_product_layering.png
BTW, the same source html file works well with 0.12.5

Answer 1

This is caused by the change of default behavior in version 0.12.6 of wkhtmltopdf. wkhtmltopdf disables local file access by default now. It could be solved by adding the command line parameter
--enable-local-file-access
or the combination
--disable-local-file-access --allow <path>

Answer 2

For those that are using laravel-snappy, add the 'enable-local-file-access' option in the config\snappy.php:
'pdf' => [
'enabled' => true,
'binary' => env('WKHTML_PDF_BINARY', '/usr/local/bin/wkhtmltopdf'),
'timeout' => false,
'options' => [
'enable-local-file-access' => true,
'orientation' => 'landscape',
'encoding' => 'UTF-8'
],
'env' => [],
],
'image' => [
'enabled' => true,
'binary' => env('WKHTML_IMG_BINARY', '/usr/local/bin/wkhtmltoimage'),
'timeout' => false,
'options' => [
'enable-local-file-access' => true,
'orientation' => 'landscape',
'encoding' => 'UTF-8'
],
'env' => [],
],
wkhtmltopdf disables local file access by default in the 0.12.6 version

Answer 3

Just bumping this thread with a correction in case you're still getting the same error in spite of using:
--enable-local-file-access
For some reason, this cmd line argument does not work when being specified after input/output files, you have to write this argument right after wkhtmltopdf.exe.
So
wkhtmltopdf.exe --enable-local-file-access input.html output.pdf
instead of other variants.

Answer 4

in my case, I put "enable-local-file-access": "", in options, it worked.

Answer 5

In Windows with Python, I came across a similar error as well when running code:
result = imgkit.from_file('postlayout.A.html', 'out.jpg', config=wkhtmltoimage_binaries)
Error:
Warning: Blocked access to file C:/XXXXXX/background.A.jpg
Error: Failed to load about:blank, with network status code 301 and
http status code 0 - Protocol "about" is unknown
What I did to resolve this:
Add variable options
kitoptions = {
"enable-local-file-access": None
}
Add options to call
FROM
result = imgkit.from_file('postlayout.A.html', 'out.jpg', config=wkhtmltoimage_binaries)
TO
result = imgkit.from_file('postlayout.A.html', 'out.jpg', config=wkhtmltoimage_binaries, options=kitoptions)
Full Source:
import imgkit
#library path to kit
path_wkthmltopdf = r'C:\Program Files\wkhtmltopdf\bin\wkhtmltoimage.exe'
wkhtmltoimage_binaries = imgkit.config(wkhtmltoimage=path_wkthmltopdf)
#OPTIONS
kitoptions = {
"enable-local-file-access": None
}
html_file_directory = r'C:\XXXX\template'
result = imgkit.from_file('postlayout.A.html', 'out.jpg', config=wkhtmltoimage_binaries, options=kitoptions)
if result:
print("successful")
else:
print("failed")

Answer 6

For the C API, contrary to what the documentation says, it's not load.blockLocalFileAccess but loadPage.blockLocalFileAccess that you must set to "false":
wkhtmltoimage_set_global_setting(settings, "loadPage.blockLocalFileAccess", "false");
Hopefully, the documentation will be updated soon; see issue #4763.

Answer 7

I confirm that the problem comes from the wkhtmltopdf version. For those on Symfony (3.4), just add an option in config.yml:
knp_snappy:
pdf:
options:
enable-local-file-access: true

Answer 8

I know am a bit late in party but just wanted to write clear example with c# here so one can understand clearly.
ProcessStartInfo proc = new ProcessStartInfo();
proc = new ProcessStartInfo();
proc.RedirectStandardError = true;
proc.UseShellExecute = false;
proc.WorkingDirectory = #"" + Config.WkhtmltopdfPath;
proc.FileName = #"" + Config.WkhtmltopdfPath + #"\wkhtmltopdf.exe";
proc.Arguments = #" --enable-local-file-access -T 0 -B 0 --page-width 210mm --page-height 450mm " + fileName + ".html " + fileName + ".pdf";
Process inkscape = Process.Start(proc);