Humble bundle book bundles - download all books at once

hb_all_books_dl.js

/* 
After purchasing a humble book bundle, go to your download page for that bundle. 
Open a console window for the page and paste in the below javascript
*/ 
$('a').each(function(i){
   if ($.trim($(this).text()) == 'MOBI') {
      $('body').append('<iframe id="dl_iframe_'+i+'" style="display:none;">');
      document.getElementById('dl_iframe_'+i).src = $(this).data('web');
   }
});

I like my files to be organized, so here's my take on it.

const commands = [];

document.querySelectorAll('.row').forEach(row => {
  const bookTitle = row.dataset.humanName;

  [...row.querySelectorAll('.downloads .flexbtn a')].forEach(el => {
    const downloadLink = el.href;
    const fileName = /\.com\/([^?]+)/.exec(downloadLink)[1];

    commands.push(`curl --create-dirs -o "${bookTitle}/${fileName}" "${downloadLink}"`);
  });
});

console.log(commands.join('; '));

Instead of wget this uses curl, because wget's -O does not create directories automatically (and while -P does, -O and -P cannot be used together).

The resulting directory tree is like this:

.
├── Advanced Penetration Testing
│   ├── advancedpenetrationtesting.epub
│   └── advancedpenetrationtesting.pdf
├── Applied Cryptography: Protocols, Algorithms and Source Code in C, 20th Anniversary Edition
│   ├── applied_cryptography_protocols_algorithms_and_source_code_in_c.epub
│   └── applied_cryptography_protocols_algorithms_and_source_code_in_c.pdf
└── Cryptography Engineering: Design Principles and Practical Applications
    ├── cryptography_engineering_design_principles_and_practical_applications.epub
    ├── cryptography_engineering_design_principles_and_practical_applications.pdf
    └── cryptography_engineering_design_principles_and_practical_applications.prc

I took @jmerle's code and changed the last line:

console.log(commands.join('; ');

to:

console.log(commands.join(' && ');

That way, it didn't try to download everything at once.

If you want to verify your downloads, here's the code to make the md5 hashes visible:

var md5_links = document.querySelectorAll(".dlmd5");
for (i in md5_links) {
  md5_links[i].click();
}

OR...

If you are like me and have way too many book bundles, you might be interested in something like the following code.

function getTitle() {
  var re = /^Humble\ Book\ Bundle\:\ (.*)\ \(/g;
  return re.exec(document.title)[1];
}
function showHashes() {
  document.querySelectorAll('.dlmd5').forEach(md5 => {
    if (md5.innerText.trim() == 'md5') {
      md5.click();
    }
  });
}
function gatherInfo() {
  const data = [];
  const bundleTitle = getTitle();
  showHashes();
  document.querySelectorAll('.row').forEach(row => {
    const bookTitle = row.dataset.humanName;
    [...row.querySelectorAll('.downloads .download')].forEach(dl => {
      const downloadLink = dl.querySelector('.flexbtn a').href;
      const filename = /\.com\/([^?]+)/.exec(downloadLink)[1];
      const md5 = dl.querySelector('a.dlmd5').innerText.trim();
      data.push({
        "bundleTitle": bundleTitle,
        "bookTitle": bookTitle,
        "filename": filename,
        "downloadLink": downloadLink,
        "md5": md5
      });
    });
  });
  return data;
}
function downloadBookBundle() {
  const commands = []
  const md5Sums = [];
  const info = gatherInfo();
  for (var i in info) {
    bundleTitle = info[i]["bundleTitle"];
    bookTitle = info[i]["bookTitle"];
    filename = info[i]["filename"];
    downloadLink = info[i]["downloadLink"];
    md5 = info[i]["md5"];
    commands.push(`curl --create-dirs -o "${bundleTitle}/${bookTitle}/${filename}" "${downloadLink}"`);
    md5Sums.push(`${md5}  ${bundleTitle}/${bookTitle}/${filename}`);
  };
  console.log(commands.join(' && '));
  console.log(md5Sums.join('\n'));
}
downloadBookBundle();

It is based upon's @jmerle's approach and is also forked here: https://gist.github.com/fsteffek/bf4ac1e3d2601629a6c9cca94b5649f6.

What does it do?

1. It prints the command line command for curl to download your Humble Book Bundle. I modified it, so each bundle is saved into a separate folder:

.
├── Bundle Name
│   └── Book Name
│       └── Files
└── More Bundles

2. It prints the content of an md5 file, which md5sum can read/check. Paste it into a file like hb_all_books.md5 ...

5b3e6de1fc4c45be45b1299ea50a6a7d  Essential Knowledge by MIT Press/Cloud Computing/cloudcomputing.epub
a14391f6971da830d064c2c0fd132019  Essential Knowledge by MIT Press/Cloud Computing/cloudcomputing.mobi
...

... and check it with md5sum -c hb_all_books.md5.

Essential Knowledge by MIT Press/Cloud Computing/cloudcomputing.epub: OK
Essential Knowledge by MIT Press/Cloud Computing/cloudcomputing.mobi: OK
...

Feel free to tell me how to make this script more readable, convenient and generally just better.

My JavaScript fork of this script is still working today: https://gist.github.com/zuazo/a91ecbb97b90ef3ef9ce8caf361199a2