So, I have this Angular code base where both ./assets/... and /assets/.... paths are used interchangeably in HTML (<img src='...'>) and CSS (background: url(...)) files.
The issue is, after exporting the app with --base-href=http://localhost/path/, some resources (images) resolve with http://localhost/path/assets/... while the other resolve with http://localhost/assets/... (resolving to the top directory on the server). I am unable to pin-point this behaviour.
I can surely put a dot in front of the resources with the pattern /assets/..., but how come they are working fine in the first place i.e. resolving correctly to http://localhost/path/assets/...? The behaviour is ambiguous. Any ideas?
i gonna explain it, but I recommend you to take a look at the documentation of angular.io
to define the base href:
Click Here
"./assets" -> Relative URL, in angular always is the Base Href
"/assets" -> It's a absolute url Trying to get from the root of the domain
Relative -> mydomain.com/my/app/assets
Absolute -> mydomain.com/assets
I am using Create-React-App and I want to add background image for my header section and I am doing this in that way:
background-image: url('~/Screenshot_11.png');
After this I'm getting this error:
./src/styles/main.scss
(./node_modules/css-loader/dist/cjs.js??ref--6-oneOf-5-1!./node_modules/postcss-loader/src??postcss!./node_modules/sass-loader/lib/loader.js??ref--6-oneOf-5-3!./src/styles/main.scss)
Module not found: You attempted to import
../../../../../../../Screenshot_11.png which falls outside of the
project src/ directory. Relative imports outside of src/ are not
supported.
I've set up homepage in package.json
"homepage": "http://localhost:3000",
In my older projects that works but today I cannot import this correctly.
They have changed that but I don't know why. Working path:
background-image: url('/Screenshot_11.png');
EDIT 2021
For people who think that it doesn't work:
https://codesandbox.io/s/agitated-turing-gsnr3
you can import that image as
import Background from './Screenshot_11.png'
and use
background-image: `url(${Background})`
This still does not work for me with images in the public folder.
UPDATED 19 March 2021
Regarding using of <ROOT/public/images> in .css files.
It appears to be a breaking change (will be considered as a bug?) in create-react-app (react-scripts) package v4.x.
And more precisely in package 'css-loader' v4.x.
3.x branch works OK with that.
Here is the corresponding issue on the github repo:
https://github.com/facebook/create-react-app/issues/9870
(and there are few more actually).
No fixes (yet). (will be?..)
But a few workarounds mentioned there.
Which one to use... it depends on your project, I suppose.
Some of workarounds:
downgrade to react-scripts 3.4.x
don't use url in CSS files :) you still can use in .JSX (inline styles). Or put in .html. They are obviously not processed by css-loader.
reconfigure webpack to add url:false to css-loader options (either eject CRA or use this: https://github.com/gsoft-inc/craco or this: https://github.com/timarney/react-app-rewired
(you can find sample configurations at the github issue page)
use this new feature of css-loader https://github.com/webpack-contrib/css-loader/pull/1264
(released in 5.1.0, current last version is 5.1.3; to use that version you can add the following to the package.json: "resolutions": { "css-loader": "5.1.3" } (at root level) )
as you see, the HTML content is not colorful, and it cannot autocomplete HTML tag
There are 2 ways to do that.
1) You could manually set the syntax to "Javascript React".
For that click on "Javascript" on the bottom right of your screen:
Then simply enter "react" and select it. After that you should have autocomplete for the html parts inside your render functions.
2) You can instruct VSCode to always open .js files as "javascriptreact". For that go to your settings and copy files.associations over to your local settings. Make sure it looks something like this and save:
"files.associations": {
"*.js": "javascriptreact"
}
Note on that one: This will always set the syntax to "javascriptreact" when you open .js files and might not always be what you want. A better solution would be to generally name react files as myfile.jsx. This way vscode will automatically set the syntax to "javascriptreact".
Hope this helps.
Save the file as .jsx ie (App.jsx) instead of .js
This is because you are saving the file as .js ie App.js.JavaScript files cannot understand HTML tags.
Another alternative is you can save in (.js) but your web pack should be configured in such a way that it should transpile it into .jsx.
For doing refer this - https://github.com/facebook/create-react-app
React understand javascript xml only.
I'm just starting to create a blog with Pelican and wanted to link to an image. I did this by including the following line in my Markdown file:
<img src="./myImg1a.png" alt="./myImg.png" style="width: 750px; height: 800px;"/>
This line was successfully reproduced in the html file, which Pelican placed in the output directory (i.e. /myBlog/output). I placed the png files in the output directory (i.e. the same directory as the html files and got the following error:
WARNING:root:Unable to find file /category/myImg1a.png/index.html or variations.
where /category refers to myBlog/output/category. When I, instead, used the following html code:
<img src="/myImg1a.png" alt="/myImg.png" style="width: 750px; height: 800px;"/>
everything worked fine. I don't understand why this should be:
If the image file is in the same directory as the html file, shouldn't "./myImg1.png" be correct and "/myImg.png" be incorrect?
Why was the folder /category/myImg1a.png/index.html being sought at all?
First of all, by design, you should not change the contents of the output directly/manually.
You should put all your static contents in separate directory which is usually named as images or paths. And, then configure the path(s) in pelicanconf.py as:
# ...
PATH = 'content'
STATIC_PATHS = ['images', 'files'] # add any no. of locations
# ...
In that case, when Pelican is building actual page, it will look for any referenced static file in ./content/images and ./content/files locations. If cannot find there, it will emit the error message.
Now, answering to your trouble ...
By,
... src="./myImg1a.png" ...
Pelican look for this myImg1a.png file in your myBlog/content/ folder as you are mentioning ./ which is the root folder for Pelican is working on.
But, when you are referring it as
... src="/myImg1a.png" ...
Pelican eventually finds it in the html file's directory. By getting / as location, Pelican is looking for it in the same directory of your myblog/my-blog-post/index.html which is myblog/my-blog-post/.
Hence, working. But not in the ideal way.
For a deeper understanding, please take a look into Pelican's documentation on this matter.
Why was the folder /category/myImg1a.png/index.html being sought at all?
Pelican, here, just trying to be smart.
I've seen multiple questions that are very similar to this one, so I was hesitant at first to post it. But nothing suggested resolved my issue and I can't seem to figure out what's wrong myself.
For a project I made for one client they wanted to ability to convert quotes for their customers (generated using an online form) to PDFs. Simple enough. As the entire project was in PHP, I used the following simple process:
Save the quote as a temporary HTML file
Use WkHTMLtoPDF to convert the HTML file to a PDF
Output this PDF file
Clean up (delete temporary files)
This worked until they changed servers. The new server has a firewall.
At first the PDF conversion step was returning a firewall page saying that the server couldn't make outbound connections. To resolve this I fed the HTML file directly instead of linking to it (/var/www/mysite/temp/18382.html instead of www.example.com/temp/18382.html). This converted the HTML, but the firewall prevented the loading of CSS and images
I can overcome the CSS by simply embedding it directly in the site instead of linking to it (using the <style> tags), but this doesn't work for images
I tried using relative links first. I changed <img src="http://www.example.com/temp/image.jpg" /> to <img src="./image.jpg" />. This didn't work.
Next I tried <img src="file:///var/www/mysite/temp/image.jpg" /> but this didn't work, either
I read around and look through the WkHTMLtoPDF manual and I tried several different command line arguments like --enable-local-file-access, --enable /var/www/mysite/temp/, and --images but nothing seems to fix it
In my case - wkhtmltopdf version 0.12.2.1 (with patched qt) - adding a base tag to the head section with the absolute path made sure images and css did get loaded.
<html>
<head>
...
<base href="http://www.example.com/">
<link href="/assets/css/style.css" rel="stylesheet">
...
</head>
If your are on linux check the ownership of your images. For windows you will find some info on http://code.google.com/p/wkhtmltopdf/wiki/Usage.
I tried different kind of paths to the image:
<img src="file:///var/www/testpdf/flowers.jpg"><br>
<img src="./flowers.jpg"><br>
<img src="flowers.jpg"><br>
<img src="/var/www/testpdf/flowers.jpg"><br>
all images are showed correct. I didn't use any command line arguments
(only wkhtmltopdf /var/www/testpdf/makepdf.html makepdf.pdf)
For Windows you need to use absolute file system paths in your markup. For instance:
<link href='C:\Projects\Hello\Hello.Web\Content\custom\home.css' rel='stylesheet' type='text/css' />
! not http://localhost/Hello.Web/Content/custom/home.css
In order to have them embed, you can insert base64 encoded images like :
<img src="data:image/png;base64,someBase64content"/>
When a browser renders your HTML, it uses a relative path (sometimes with a URL at the beginning of it) like this:
<img src="/static/images/some_picture.png">
<img src="http://www.example.com/static/images/some_picture.png">
But when WkHTMLtoPDF is running on your server, it's interfacing with your local files directly through the filesystem, not through a web server. So for local files, unlike a browser, WkHTMLtoPDF wants the actual filepath:
<img src="/var/www/myapplication/static/images/some_picture.png">
(This worked for me with Python Flask)
on Windows use path: file:///C:/some/dir/some/file.img (notice the tripple /)
It is may be too late :)
BTW, just add this config into your options in last.
options = {'enable-local-file-access': None}
pdfkit.from_string(html, 'filename.pdf', options=options)
After taking in everyone's kind assistance from here and around the net, I discovered something that worked for me - coding in asp.net (c#).
I needed to access the image by url (not file path), as the original source html still needed to be accessed. Through troubleshooting, I discovered these points.
These flags had to be passed in to the command line process:
"-q -n --disable-smart-shrinking --images --page-size A4"
URL still has to be absolute.
Image must be a jpg! I was originally trying to do a gif, to no avail.
I discovered adding "--enable-local-file-access" didn't help, as it requires '\' slashes in the image path instead of '/' slashes, which doesn't help if you also hope to use the source html (in some browsers). Also, if you need to access the local file system, you need to provide an absolute path, as it reads straight from the root and goes from there.
Hope this helps others.
Cheers
-y
I know this is quite old topic, but I've just faced the same issue and maybe it will help to someone.
I tried different approaches, like css background image and using string as base64 encoded data image. Sometimes it helped, sometimes not - no particular rule I could found.
It turned out that upgrading library wkhtmltopdf solved the problem.
I was using version 0.12.0 and upgraded to 0.12.3
What fixed it for me was removing the references to my CSS files. It turned out I had was setting img { max-height: 100%; } in an otherwise-empty div so that was being interpreted as max-height: 0.
So check out your CSS and there might an issue there. This worked:
<div><img src="image.png"/></div>
And running command line in the directory with image.png:
wkhtmltopdf example.html example.pdf
But this does not:
<div><img src="image.png" style = "max-height: 100%; "/></div>
Because the image gets squished to 0 height. Firefox seems to correct this so it wasn't obvious.
This is probably due to SE Linux or firewall rules that prevent you from going out on the internet and back to your own server. You can update your host file to point calls to your domain back to your machine's home address.
make sure you have the latest version of wkhtmltopdf with patched qt.
you can implement a helper that flask jinja uses it to distinguish if the template is for rendering or only generating pdf, or maybe both.
let' say that tmpl_bind is the data object to bind in the template, add a new key tmpl_bind["pdf"] set it True or False.
when using wkhtmltopdf or pdfkit, add enable-local-file-access to options object.
now create a helper function called static_file
def static_file(filename, pdf=False):
# wkhtmltopdf only read absolute path
if pdf:
basedir = os.path.abspath(app.root_path)
return "".join([basedir, "/static/", filename])
else:
return url_for('static', filename = filename)
as we say, wkhtmltopdf for some os only read files when you include their absolute path. Note that you may add or remove parts from the app.root_path, according to your app structure, but this will work in most of cases.
in app configuration add this line after importing static_file function if it is in another file
app.jinja_env.globals['static'] = static_file
finally, in the template import files, images by calling the static_file helper function
<link href="{{ static('css/style.css', pdf) }}" rel="stylesheet" />
<img src="{{ static('assets/images/logo.svg', pdf) }}" class="logo">
For me the problem was resolved by doing two things:
1: In your app/config/config.yml
- Under the knp_snappy
- For the option temporary_folder write ./
- i.e: temporary_folder: ./
2: Now in your html.twig pages remove the asset and write:
From: <link rel="stylesheet" type="text/css" href="{{ asset('css/default_template.css') }}">
To: <link rel="stylesheet" type="text/css" href="css/default_template.css">
And after that, it worked for me.
Hopefully i've helped somebody. Thank you !
To generate your pdf with your images or styles you need to provide the server path as follows:
<img src="https://upload.wikimedia.org/wikipedia/...image.png" />
<link href="http://localhost:8080/css/file.css" media="all" rel="stylesheet" type="text/css" />
Note this second link, it's the local address to your stylesheet, or could be a remote like the first link. The file path didn't work for me, only the server path to the resource.
Ps: In my situation, I am using spring boot in Intellij IDE and I needed to invalidate cache of IDE and not run in debug mode in order to work, otherwise it may be not update things.
URL of images must be absolute not relative.
Check this working example in a twig template:
<img src="{{ absolute_url(asset('images/example.png')) }}"/>
Just spent a few days on getting a Flask/ Blueprint /static file/ css to be read by wkhtmltopdf, so I thought I'd share what I learned.
Win 7, Flask 0.12 on Python 3.4.4, using Pycharm pro, latest pdfkit and wkhtmltopdf.
download the wkhtmltopdf here
install it -mine installed on:
C:\Program Files\wkhtmltopdf\bin\wkhtmltopdf.exe
right after you import pdfkit into your flask routes.py script ,insert the lines:
path_wkthmltopdf = r'C:\Program Files\wkhtmltopdf\bin\wkhtmltopdf.exe'
config = pdfkit.configuration(wkhtmltopdf=path_wkthmltopdf)
(note the "r" in the first line here !! )
when you use pdfkit in a route, add ",configuration = config" as an argument, eg:
pdfkit.from_string(html_text, output_filename, configuration = config)
this tells pdfkit where to look for wkhtmltopdf. Yes, you need to do this.
NOW in your flask BASE TEMPLATE add , _external = True to your css route, eg:
(this will keep wkhtmltopdf from throwing error cant find css)
NOW (serious bootstrap template juju warning):
go into your flask /external libraries /site-packages /flask_bootstrap /templates /base.html template and:
a. fix CSS link:
<link href="{{bootstrap_find_resource('css/bootstrap.css', cdn='bootstrap')}}" rel="stylesheet" media="screen">
add "http:" so it looks like:
<link href="http:{{bootstrap_find_resource('css/bootstrap.css', cdn='bootstrap')}}" rel="stylesheet" media="screen">
b. fix JS links:
add "http:" so the JS links look like:
<script src="http:{{bootstrap_find_resource('jquery.js', cdn='jquery')}}"></script>
<script src="http:{{bootstrap_find_resource('js/bootstrap.js', cdn='bootstrap')}}"></script>
and with all this
your flask html to pdf conversion
using pdfkit and wkhtmltopdf
should run without errors.
note: I moved to flask from PHP and if you are a flask-er, please post your solutions up here. The flask community is MUCH smaller than the PHP community so we all have to pitch in.
opt = dict()
opt["orientation"] = "landscape"
opt["enable-local-file-access"] = ""
config = pdfkit.configuration(wkhtmltopdf='/usr/bin/wkhtmltopdf')
enable local file access to access images