I have got an error message "Chart download failed."

[Mars2105]

Hello,

I have got always an error message "Chart download failed." after typing a diagramm URL, e.g. for URL http://cf.datawrapper.de/d02Bg/1/

This URL is correct. How can I eliminate this error. I have a very little knowlidges about ruby on rails.

My apache settings are

Many thanks for your help.
Slava

[tf]

Hi Slava,

please have a look in the log file of the background worker scraping the charts: log/jobs/production/scraping.log.

Datawrapper changed their URL scheme recently. Newly generated charts have URLs starting with datawrapper.dwcdn.net. The old datawrapper charts cause a connection refused error, while trying to access http://piwik.datawrapper.de/piwik.js. I also see that error in the DevTools console when I open your chart URL in Chrome.

In my case that error caused scraping of charts to fail.

To use the new datawrapper URL scheme, you need to add it to the list of supported hosts in the pageflow-chart initializer. I'll update the README now since I think it is not yet mentioned there.

Cheers

[Mars2105]

Many thanks for your answer.

We have the problem resolved.

Strange but the version of pageflow-chart folder has other content of files
as on this page https://github.com/codevise/pageflow-chart

For this reason I have replaced the folder "pageflow-chart" completely with
the last GIT version (gem version 0.1.0)

$ cd /var/lib/gems/2.1.0/gems
$ rm -Rf pageflow-chart-0.1.0/
$ git clone https://github.com/codevise/pageflow-chart.git
pageflow-chart-0.1.0
$ cd pageflow-chart-0.1.0
$ ls -l
$ service apache2 restart

Many thanks for your support.
Slava

[Mars2105]

Can I use this URL?
https://charts.datawrapper.de/LCHQB/index.html

[tf]

You have to add a new supported host in the initializer. See the updated README (configuration section)

I've now released v0.1.1. Before, there were some yet unreleased changes in the github repository. If you wish to use an upstream version straight from github again in the future, I'd suggest using bundler's git support instead of tinkering with the gem folder manually.

[Mars2105]

Like this?
File config/initializers/pageflow_chart.rb

Pageflow::Chart.configure do |config|
config.scraped_sites_root_url = '/datawrapper'

Allow scraping charts from custom account URLs

config.supported_hosts << 'http://charts.datawrapper.de'
end

[Mars2105]

Which command must I use?
gem update pageflow-chart or other?

[tf]

Yes, that's the correct config file.

[tf]

No. You have to use bundler. Please understand that we can not provide support for general Ruby on Rails questions in this context.

Have a look at the Updating Pageflow wiki page. The steps there also apply to other pageflow gems like this one. Also have a look at the bundler docs for more background info.

[Mars2105]

Thank you.
gem 'pageflow-chart', git: 'https://github.com/codevise/pageflow-chart.git'

[tf]

Or simply gem 'pageflow-chart' in the Gemfile and then bundle update pageflow-chart to update the Gemfile.lock.

[Mars2105]

Many thanks! It works!

[tf]

Great. I'll close this issue then.