Mercurial Hosting > luan
annotate website/src/tutorial.html.luan @ 750:f172f1dff4b6
minor
| author | Franklin Schmidt <fschmidt@gmail.com> |
|---|---|
| date | Fri, 15 Jul 2016 01:25:08 -0600 |
| parents | 2113294ccc6d |
| children | 48506d03e230 |
| rev | line source |
|---|---|
|
693
ca169567ce07
module URIs must now include ".luan"
Franklin Schmidt <fschmidt@gmail.com>
parents:
686
diff
changeset
|
1 local Io = require "luan:Io.luan" |
|
ca169567ce07
module URIs must now include ".luan"
Franklin Schmidt <fschmidt@gmail.com>
parents:
686
diff
changeset
|
2 local Html = require "luan:Html.luan" |
|
ca169567ce07
module URIs must now include ".luan"
Franklin Schmidt <fschmidt@gmail.com>
parents:
686
diff
changeset
|
3 local Http = require "luan:http/Http.luan" |
|
ca169567ce07
module URIs must now include ".luan"
Franklin Schmidt <fschmidt@gmail.com>
parents:
686
diff
changeset
|
4 local Shared = require "site:/Shared.luan" |
| 382 | 5 |
|
386
db23f654f87d
make all of website use luan
Franklin Schmidt <fschmidt@gmail.com>
parents:
383
diff
changeset
|
6 |
|
505
7bc63886d4f2
web page modules now return a function
Franklin Schmidt <fschmidt@gmail.com>
parents:
503
diff
changeset
|
7 return function() |
| 382 | 8 Io.stdout = Http.response.text_writer() |
|
391
2f5cc9c2cbf0
replace Html.simply_html_page with simply_html_head and simply_html_body_bottom
Franklin Schmidt <fschmidt@gmail.com>
parents:
387
diff
changeset
|
9 %> |
|
2f5cc9c2cbf0
replace Html.simply_html_page with simply_html_head and simply_html_body_bottom
Franklin Schmidt <fschmidt@gmail.com>
parents:
387
diff
changeset
|
10 <html> |
|
2f5cc9c2cbf0
replace Html.simply_html_page with simply_html_head and simply_html_body_bottom
Franklin Schmidt <fschmidt@gmail.com>
parents:
387
diff
changeset
|
11 <head> |
|
2f5cc9c2cbf0
replace Html.simply_html_page with simply_html_head and simply_html_body_bottom
Franklin Schmidt <fschmidt@gmail.com>
parents:
387
diff
changeset
|
12 <title>Luan Tutorial</title> |
|
562
7cc9d4a53d3b
remove SimplyHTML from documentation
Franklin Schmidt <fschmidt@gmail.com>
parents:
512
diff
changeset
|
13 <style> |
|
7cc9d4a53d3b
remove SimplyHTML from documentation
Franklin Schmidt <fschmidt@gmail.com>
parents:
512
diff
changeset
|
14 @import "/site.css"; |
|
7cc9d4a53d3b
remove SimplyHTML from documentation
Franklin Schmidt <fschmidt@gmail.com>
parents:
512
diff
changeset
|
15 </style> |
|
391
2f5cc9c2cbf0
replace Html.simply_html_page with simply_html_head and simply_html_body_bottom
Franklin Schmidt <fschmidt@gmail.com>
parents:
387
diff
changeset
|
16 </head> |
|
2f5cc9c2cbf0
replace Html.simply_html_page with simply_html_head and simply_html_body_bottom
Franklin Schmidt <fschmidt@gmail.com>
parents:
387
diff
changeset
|
17 <body> |
| 382 | 18 |
| 19 <div container> | |
|
387
23d075ce1e48
add website/src/Shared.luan
Franklin Schmidt <fschmidt@gmail.com>
parents:
386
diff
changeset
|
20 <% Shared.header() %> |
|
562
7cc9d4a53d3b
remove SimplyHTML from documentation
Franklin Schmidt <fschmidt@gmail.com>
parents:
512
diff
changeset
|
21 <h1>Luan Tutorial</h1> |
| 382 | 22 |
| 23 | |
| 24 <p>Create a file <b>hello.luan</b> containing:</p> | |
| 25 | |
|
562
7cc9d4a53d3b
remove SimplyHTML from documentation
Franklin Schmidt <fschmidt@gmail.com>
parents:
512
diff
changeset
|
26 <pre><%=Html.encode[[ |
| 382 | 27 %> |
| 28 Hello World | |
| 29 <% | |
|
562
7cc9d4a53d3b
remove SimplyHTML from documentation
Franklin Schmidt <fschmidt@gmail.com>
parents:
512
diff
changeset
|
30 ]]%></pre> |
| 382 | 31 |
| 32 <p>To run this, type <b>luan file:hello</b> on the command line. This should print <b>Hello World</b>.</p> | |
| 33 | |
| 34 <p>The syntax here is based on <a href="http://en.wikipedia.org/wiki/JavaServer_Pages">JSP</a>. Let's change it a little:</p> | |
| 35 | |
|
562
7cc9d4a53d3b
remove SimplyHTML from documentation
Franklin Schmidt <fschmidt@gmail.com>
parents:
512
diff
changeset
|
36 <pre><%=Html.encode[[ |
|
686
33f1b4ad2c9d
more documentation fixes
Franklin Schmidt <fschmidt@gmail.com>
parents:
562
diff
changeset
|
37 local name = "Bob" |
| 382 | 38 %> |
| 39 Hello <%= name %> | |
| 40 <% | |
|
562
7cc9d4a53d3b
remove SimplyHTML from documentation
Franklin Schmidt <fschmidt@gmail.com>
parents:
512
diff
changeset
|
41 ]]%></pre> |
| 382 | 42 |
| 43 <p>This should print <b>Hello Bob</b>. Now let's try a more conventional approach:</p> | |
| 44 | |
|
562
7cc9d4a53d3b
remove SimplyHTML from documentation
Franklin Schmidt <fschmidt@gmail.com>
parents:
512
diff
changeset
|
45 <pre> |
|
693
ca169567ce07
module URIs must now include ".luan"
Franklin Schmidt <fschmidt@gmail.com>
parents:
686
diff
changeset
|
46 local Io = require "luan:Io.luan" |
| 382 | 47 local print = Io.print |
| 48 | |
| 49 print("Hello World") | |
|
562
7cc9d4a53d3b
remove SimplyHTML from documentation
Franklin Schmidt <fschmidt@gmail.com>
parents:
512
diff
changeset
|
50 </pre> |
| 382 | 51 |
|
693
ca169567ce07
module URIs must now include ".luan"
Franklin Schmidt <fschmidt@gmail.com>
parents:
686
diff
changeset
|
52 <p>In Luan, a function call with one string argument doesn't require parenthesis, so <b>print("Hello World")</b> is the same as <b>print "Hello World"</b> and <b>require "luan:Io.luan"</b> is the same as <b>require("luan:Io.luan")</b>. Both <b>require</b> and <b>print</b> are functions.</p> |
| 382 | 53 |
|
693
ca169567ce07
module URIs must now include ".luan"
Franklin Schmidt <fschmidt@gmail.com>
parents:
686
diff
changeset
|
54 <p>The <b>require</b> function takes a <a href="http://en.wikipedia.org/wiki/Uniform_resource_identifier">URI</a> as an argument. Examples of URIs are "<b>luan:Io.luan</b>" and "<b>file:hello.luan</b>". <b>require</b> is used to import a module, which is returned from the <b>require</b> function call. In the case above, we assign the module to the local variable <b>Io</b>. The function <b>print</b> is a member of this module. We could have done <b>Io.print("Hello World")</b> but instead we chose to assign <b>print</b> to a local variable and use that to call the function.</p> |
| 382 | 55 |
| 56 <p>Luan starts with only two defined functions: <b>require</b> and <b>java</b>. You will use <b>require</b> to import whatever you need. This is a little more work, but makes it clear in each file where each function comes from.</p> | |
| 57 | |
| 58 <p>Let's a make fancier version:</p> | |
| 59 | |
|
562
7cc9d4a53d3b
remove SimplyHTML from documentation
Franklin Schmidt <fschmidt@gmail.com>
parents:
512
diff
changeset
|
60 <pre> |
|
693
ca169567ce07
module URIs must now include ".luan"
Franklin Schmidt <fschmidt@gmail.com>
parents:
686
diff
changeset
|
61 local Io = require "luan:Io.luan" |
| 382 | 62 local print = Io.print |
| 63 | |
|
512
d96944467ffc
update documentation for luan changes
Franklin Schmidt <fschmidt@gmail.com>
parents:
505
diff
changeset
|
64 local function hello(name) |
| 382 | 65 print("Hello "..name) |
| 66 end | |
| 67 | |
| 68 hello("Bob") | |
|
562
7cc9d4a53d3b
remove SimplyHTML from documentation
Franklin Schmidt <fschmidt@gmail.com>
parents:
512
diff
changeset
|
69 </pre> |
| 382 | 70 |
| 71 <p>The <b>..</b> operator does concatenation. This will print <b>Hello Bob</b>.</p> | |
| 72 | |
| 73 <p>Now let's make a web page. First we need a directory for our website. So create a directory <b>site</b>. In this directory, create a file <b>hi.luan</b> containing: | |
| 74 | |
|
562
7cc9d4a53d3b
remove SimplyHTML from documentation
Franklin Schmidt <fschmidt@gmail.com>
parents:
512
diff
changeset
|
75 <pre><%=Html.encode[[ |
|
693
ca169567ce07
module URIs must now include ".luan"
Franklin Schmidt <fschmidt@gmail.com>
parents:
686
diff
changeset
|
76 local Io = require "luan:Io.luan" |
|
ca169567ce07
module URIs must now include ".luan"
Franklin Schmidt <fschmidt@gmail.com>
parents:
686
diff
changeset
|
77 local Http = require "luan:http/Http.luan" |
| 382 | 78 |
|
512
d96944467ffc
update documentation for luan changes
Franklin Schmidt <fschmidt@gmail.com>
parents:
505
diff
changeset
|
79 return function() |
| 382 | 80 Io.stdout = Http.response.text_writer() |
| 736 | 81 %> |
| 82 <html> | |
| 83 <body> | |
| 84 Hello World | |
| 85 </body> | |
| 86 </html> | |
| 87 <% | |
| 382 | 88 end |
|
562
7cc9d4a53d3b
remove SimplyHTML from documentation
Franklin Schmidt <fschmidt@gmail.com>
parents:
512
diff
changeset
|
89 ]]%></pre> |
| 382 | 90 |
|
693
ca169567ce07
module URIs must now include ".luan"
Franklin Schmidt <fschmidt@gmail.com>
parents:
686
diff
changeset
|
91 <p>Now go back to the parent directory and do <b>luan luan:http/serve.luan file:site</b>. This will run the Luan web server on port 8080. Try going to <a href="http://localhost:8080/">http://localhost:8080/</a>. You should see the directory. If you click on <b>hi.luan</b> you will see the source. But if you remove the <b>.luan</b> and just go to <a href="http://localhost:8080/hi">http://localhost:8080/hi</a> then you will run the program which will generate the web page.</p> |
| 382 | 92 |
|
562
7cc9d4a53d3b
remove SimplyHTML from documentation
Franklin Schmidt <fschmidt@gmail.com>
parents:
512
diff
changeset
|
93 <p>The Luan webserver expects the file to return a function and calls it to generate the page. Code of the form <b><%=Html.encode[[%>...<%]]%></b> writes its output to <b>Io.stdout</b> which by default is the standard output of the command line. So in the returned function one usually starts by setting <b>Io.stdout</b> to a <code>text_writer</code> which writes its output to the HTTP response (to the web browser).</p> |
| 382 | 94 |
| 95 <p>You can find this example and others in the <a href="examples">examples directory</a>. Take a look at <a href="examples/hi2.luan">hi2.luan</a> next. Remember to remove the <b>.luan</b> from the URL to run the code. And by the way, you can see the source for this page at <a href="tutorial.html.luan">tutorial.html.luan</a>.</p> | |
| 96 | |
| 401 | 97 <p>So now you have built your website and you want to publish it to the web. If you have your own domain, create a CNAME record for it pointing to <b>s1.luanhost.com</b>. If you don't have a domain, just use a domain like <b>bob.s1.luanhost.com</b> (anything of the form <b>*.s1.luanhost.com</b>). Assuming your directory is <b>site</b> and you will use the password <b>secret</b>, do the following from the command line: |
| 382 | 98 |
|
562
7cc9d4a53d3b
remove SimplyHTML from documentation
Franklin Schmidt <fschmidt@gmail.com>
parents:
512
diff
changeset
|
99 <pre> |
|
693
ca169567ce07
module URIs must now include ".luan"
Franklin Schmidt <fschmidt@gmail.com>
parents:
686
diff
changeset
|
100 luan luan:host/push.luan bob.s1.luanhost.com secret site |
|
562
7cc9d4a53d3b
remove SimplyHTML from documentation
Franklin Schmidt <fschmidt@gmail.com>
parents:
512
diff
changeset
|
101 </pre> |
| 382 | 102 |
|
693
ca169567ce07
module URIs must now include ".luan"
Franklin Schmidt <fschmidt@gmail.com>
parents:
686
diff
changeset
|
103 <p>The form is <b>luan luan:host/push.luan domain password directory</b>. If you change your site, just run this again and your site will be updated. To delete your site, do <b>luan luan:host/delete.luan domain password</b>.</p> |
| 382 | 104 |
| 105 <p>Hopefully this short tutorial gave you an idea of how to use Luan to make a website.</p> | |
| 106 | |
| 107 </div> | |
| 108 | |
|
391
2f5cc9c2cbf0
replace Html.simply_html_page with simply_html_head and simply_html_body_bottom
Franklin Schmidt <fschmidt@gmail.com>
parents:
387
diff
changeset
|
109 </body> |
|
2f5cc9c2cbf0
replace Html.simply_html_page with simply_html_head and simply_html_body_bottom
Franklin Schmidt <fschmidt@gmail.com>
parents:
387
diff
changeset
|
110 </html> |
|
2f5cc9c2cbf0
replace Html.simply_html_page with simply_html_head and simply_html_body_bottom
Franklin Schmidt <fschmidt@gmail.com>
parents:
387
diff
changeset
|
111 <% |
| 382 | 112 end |