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Support for relative urls #53

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23bf244
Support for relative urls
Jun 2, 2017
3a0f60d
Added relative url documentation
Jun 2, 2017
59f042e
Fixed back button
Jun 2, 2017
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16 changes: 14 additions & 2 deletions htmlpreview.js
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Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,19 @@ var HTMLPreview = {
previewform: document.getElementById('previewform'),

file: function() {
return location.search.substring(1); //Get everything after the ?
var url = location.search.substring(1); //Get everything after the ?
var referrer = document.referrer;
if ((url.startsWith('./') || url.startsWith('../')) && referrer) {
if (referrer.toLowerCase().endsWith('.md')) {
referrer = referrer.substring(0, referrer.lastIndexOf('/')+1);
}
if (! referrer.endsWith('/')) {
referrer = referrer + '/';
}
return referrer + url;
} else {
return url;
}
},

raw: function() {
Expand Down Expand Up @@ -68,7 +80,7 @@ var HTMLPreview = {
&& data.query.results.resources.status == 200) {
HTMLPreview.content = data.query.results.resources.content.replace(/<head>/i, '<head><base href="' + HTMLPreview.raw() + '">').replace(/<script( type=["'](text|application)\/javascript["'])?/gi, '<script type="text/htmlpreview"').replace(/<\/body>/i, '<script src="//' + location.hostname + '/htmlpreview.min.js"></script><script>HTMLPreview.replaceAssets();</script></body>').replace(/<\/head>\s*<frameset/gi, '<script src="//' + location.hostname + '/htmlpreview.min.js"></script><script>document.addEventListener("DOMContentLoaded",HTMLPreview.replaceAssets,false);</script></head><frameset'); //Add <base> just after <head> and inject <script> just before </body> or </head> if <frameset>
setTimeout(function() {
document.open();
document.open("text/html", "replace");
document.write(HTMLPreview.content);
document.close();
}, 50); //Delay updating document to have it cleared before
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2 changes: 1 addition & 1 deletion htmlpreview.min.js
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7 changes: 3 additions & 4 deletions index.html
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Original file line number Diff line number Diff line change
Expand Up @@ -15,7 +15,7 @@
color: #666;
}
form {
padding: 20px;
padding: 20px;
text-align: center;
}
strong {
Expand All @@ -34,11 +34,10 @@
<form id="previewform" action="">
<h1>GitHub &amp; BitBucket HTML Preview</h1>
<p>Enter URL of the HTML file to preview: <input type="url" id="file" value="" placeholder="e.g. https://github.com/user/repo/blob/master/index.html" size="60" autofocus> <input type="submit" value="&raquo;"></p>
<p>or prepend to the URL: <strong>http://htmlpreview.github.io/?</strong>https://github.com/twbs/bootstrap/blob/gh-pages/2.3.2/index.html</p>
<p>or use this bookmarklet while browsing GitHub or BitBucket: <a href="javascript:void('http://htmlpreview.github.io/'==window.location?alert('Drag me to your bookmarks bar!'):window.location='http://htmlpreview.github.io/?'+window.location)"><strong>HTMLPreview</strong></a></p>
<p>or prepend to the URL: <strong>http://htmlpreviewer.github.io/?</strong>https://github.com/twbs/bootstrap/blob/gh-pages/2.3.2/index.html</p>
<p id="footer">Developed by <a href="https://github.com/niutech">niu tech</a> | Contribute on <a href="https://github.com/htmlpreview/htmlpreview.github.com">GitHub</a></p>
</form>
<script src="/htmlpreview.min.js"></script>
<script src="htmlpreview.min.js"></script>
<script>HTMLPreview.init();</script>
</body>
</html>
4 changes: 4 additions & 0 deletions readme.md
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Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,10 @@ In order to use it, just prepend this fragment to the URL of any HTML file: **[h
- http://htmlpreview.github.io/?https://github.com/twbs/bootstrap/gh-pages/2.3.2/index.html
- http://htmlpreview.github.io/?https://github.com/documentcloud/backbone/blob/master/examples/todos/index.html

When used from a markdown file on github, it is also possible to use relative urls within the same repository. Very useful for linking from .md files to html files relative to the same revision in the repository. e.g.:

- https://htmlpreview.github.io/?../../raml/api.html#nodes__nodeid__gws_post

What it does is load HTML using YQL, then process all links, frames, scripts and styles, and load each of them using YQL, so they can be evaluted in the browser. Here is the workflow:
```
HTMLPreview.init() -> HTMLPreview.send(HTML) -> YQL fetch HTML -> HTMLPreview.loadHTML(data) -> HTMLPreview.replaceAssets() -> HTMLPreview.send(CSS) -> YQL fetch CSS -> HTMLPreview.loadCSS(data) -> HTMLPreview.send(JS) -> YQL fetch JS -> HTMLPreview.loadJS(data)
Expand Down