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https://github.com/KrzysiekJ/jekyll-paspagon

Sell your Jekyll blog posts in various formats for cryptocurrencies.
https://github.com/KrzysiekJ/jekyll-paspagon

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Sell your Jekyll blog posts in various formats for cryptocurrencies.

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README 

        
# jekyll-paspagon



This [Jekyll](http://jekyllrb.com) plugin allows you to sell blog posts in various formats (HTML, EPUB, AZW3, MOBI, PDF and more) for [BlackCoin](http://blackcoin.co), using Amazon S3 and [Paspagon](http://paspagon.com).



## Installation



### Install dependencies



If you want to sell posts in formats other than HTML, [install Pandoc](http://pandoc.org/installing.html). If you want to sell MOBI, AZW3 or PDF files, install [Calibre](https://calibre-ebook.com/).



### Install plugin



Add the `jekyll-paspagon` gem to the `:jekyll_plugins` group in your `Gemfile`:



```ruby

group :jekyll_plugins do

  gem 'jekyll-paspagon', '~>1'

end

```



### Configure Paspagon



To your `_config.yml`, add a section adhering to the following example:



```yaml

paspagon:

  # By making this entry, you indicate that you accept Paspagon’s terms of

  # service. Be sure that you’ve actually read these terms!

  accept-terms: https://github.com/Paspagon/paspagon.github.io/blob/master/terms-seller.md

  buckets:

    your-bucket-name:

      seller:

        country-code: PL

        email: [email protected] # Email is optional

      payment:

        # This section provides default values that you can override for each post.

        #

        # You can specify prices in BLK, BTC, XAU (troy ounce of gold) and some

        # other currencies (see Paspagon’s terms of service for a complete list).

        # (Paspagon takes only one price into account).

        price:

          USD: 3

        address:

          BLK: Byour-address

        # Time (in seconds) after which download link will expire.

        link-expiration-time: 600

  # A name of a bucket which will be used to store S3 request logs.

  logging_bucket: paspagon-logs-foo

```



### Set default post configuration



Add the bucket and formats configuration to the `default` section in your `_config.yml`. This is optional, but handy.



```yaml

defaults:

  - scope:

      path: ""

    values:

      formats:

        # This section provides default values that you can override for each post.

        html:

          paid_after: 15 # HTML version will be paid 15 days after publication.

        pdf:

          content_disposition: attachment

          # If you don’t provide content type, the plugin will try to set a

          # reasonable default for some popular formats, falling back to

          # application/octet-stream if necessary.

          content_type: application/pdf

          paid_before: 2 # PDF version will be paid for the first two days.

        epub: {} # EPUB version will be paid from the beginning.

      bucket: your-bucket-name

```



Caveat: “default” values in Jekyll are actually not default values that can be simply overridden. Instead they get “deep merged” into post variables. If you want to unset a specific nested value inside the `formats` hash, set it to `false`.



### Change post template



Inform your readers that you offer alternate post formats by modifying the post template. In a simple form the relevant fragment may look like this:



```liquid

{% unless page.formats == empty %}

  
Available formats:

    {% for format in page.format_array %}

      {{ format.name }}{% unless forloop.last %},{% endunless %}

    {% endfor %}

  


{% endunless %}

```



A more sophisticated example, which uses the `page.excerpt_only` variable (set only when HTML is a paid format and a summary is being rendered):



```liquid

{% unless page.formats == empty %}

  


    {% if page.excerpt_only %}

      Available formats:

    {% else %}

      Alternate formats:

    {% endif %}

    {% for format in page.format_array %}

      {% if format.name != 'HTML' or page.excerpt_only %}

        {{ format.name }}{% unless forloop.last %},{% endunless %}

      {% endif %}

    {% endfor %}

  


{% endunless %}

```



### Change feed template



If you provide a RSS/Atom feed, you may want to ensure that it contains only post excerpts instead of complete contents. Typically, you will need to change `{{ post.content | xml_escape }}` to `{{ post.excerpt | xml_escape }}` in your `feed.xml` template.



### Generate full URLs everywhere



If you’re going to sell HTML versions of your posts (which will be hosted on a different domain), you should ensure that links on your website contain the domain. The easiest way to do it is to remove all occurences of `site.url` from the templates (usually in `feed.xml` and `_includes/head.html`), add the domain to the `baseurl` setting in `_config.yml` and use its old value only when running jekyll serve:



```shell

jekyll serve --baseurl ''

```



Remember to run `jekyll build` before each deployment.



## Usage



After doing the steps above, paid versions of your posts will be generated automatically.



If you specify thresholds like `paid_before`, you will need to run `jekyll build` again after reaching them.



You may override formats, assigned buckets, prices, payment addresses and link expiration times for each post by putting the relevant data in the YAML front matter:



```yaml

layout: post

title: Foo

payment:

  price:

    USD: false

    XAU: 3

  address:

    BLK: Bfoo

bucket: foo

formats:

  epub:

    paid_after: 15

  pdf:

    # Setting this to false means that a post will be paid from the beginning.

    # If you want a format to be free instead, set this to 0.

    paid_before: false

  azw3: {}

```



Two Jekyll subcommands are available to synchronize paid content with Amazon S3. You need to [specify AWS credentials](http://blogs.aws.amazon.com/security/post/Tx3D6U6WSFGOK2H/A-New-and-Standardized-Way-to-Manage-Credentials-in-the-AWS-SDKs) beforehand.



### paspagon_prepare



This command creates necessary buckets, configures logging and log expiration (to 90 days) and sets permissions for Paspagon. It typically needs to be executed only once, after configuring Paspagon.



### paspagon_sync



This command uploads missing or updated paid files to S3 and removes ones which are not present locally. It should be ran each time a blog content update is deployed.



## Markdown compatibility



jekyll-paspagon uses Pandoc to generate formats other than HTML. The default input format is `markdown_github+yaml_metadata_block-hard_line_breaks`. It may be impacted by some site settings like Kramdown’s `hard_wrap`, but the most reliable way of changing it is setting it explicitly in `_config.yml`:



```yaml

pandoc:

  input: markdown_phpextra+yaml_metadata_block-fenced_code_blocks+strikeout

```



For more information, refer to [Pandoc’s documentation on Markdown](http://pandoc.org/README.html#pandocs-markdown).



## Versioning



This project uses [semantic versioning](http://semver.org/).



## License



This software is licensed under [the MIT License](LICENSE).