Delver is a “Social Shopping Platform”, You are more than welcome to check our website at www.delver.com
We are still in “closed beta” but, leave me a comment or an email and I will send you an invitation.
We also opened our Blog where we will post about new features, technology and other cool stuff.
After we understand what video stream is all about and we wrote our first piece of SWFObject in Javascript. let’s try to have this working on our servers, of course that such things tend to fail. But let’s understand why…
First thing we need to understand is whether such failures occur due to my code, file
format or server configuration.
let’s have a simple check trying to access the file directly using our browser.
IIS7:
configure your IIS to serve the following files: swf and mp4 using Static Content
<
add
name
="FlashFiles"
path
="*.swf"
verb
="*"
modules
="StaticFileModule"
scriptProcessor
=""
resourceType
="File"
requireAccess
="Script"
/>
<
add
name
="VideoFiles"
path
="*.mp4"
verb
="*"
modules
="StaticFileModule"
scriptProcessor
=""
resourceType
="File"
requireAccess
="Script"
/>
Setting handler(s) won’t be good enough, requesting the server again will return “404.3
– mime type missing”.
Don’t worry Adding new mime type to IIS 7 - is easy:
<
configuration
>
<
system.webServer
>
<
staticContent
>
<
mimeMap
fileExtension
=".mp4"
mimeType
="video/mp4"
/>
</
staticContent
>
</
system.webServer
>
</
configuration
>
Apache:
While installing the static content on our static servers (apache) – we’ve found out
that requesting the files from firefox return with “no content length” and “incorrect
mime type”
adding the correct mime type to the /etc/mime.type
video/mp4 mp4
Check the Request\Response we’ve found out that our servers are still returning compressed
response , googling it find out that Firefox cann’t handle gzipped video stream,
compression was selectively disabled by adding the following line to /etc/httpd/conf.d/static.d/static.conf:
SetEnvIfNoCase Request_URI \.(?:gif|jpe?g|png|mp4)$ no-gzip dont-vary
Apache solution provided by Tomer G.
You can read here my introduction about video streaming.
In order to embed rich media content into web pages and have our code compatible with
different browsers we will use the SWFObject
2.2.
The SWFObject will render the right tags for the right browsers.
Here is a short, unobtrusive JS for showing your movie:
1: $(function()
{
2:
var videoBase
= 'http://static-server/';
3:
4: $('.VideoTeaserArea').click(function()
{
5: $(this).openLightBox("<div
id='media'></div>");
6: playMovie('intro-movie.swf');
7: });
8:
9:
function playMovie(videoFile)
{
10:
var videoUrl
= videoBase + videoFile;
11:
var att
= { data: videoUrl, width: "640", height: "378",
allowfullscreen:true};
12:
var
params =
{ flashvars: "autostart=true"};
13:
var id
= "media";
14:
var myObject
= swfobject.createSWF(att, params, id);
15: }
16: });
- line 2: Our movie directory, better place such content on static server or even
CDNs.
- line 4: VideoTeaserArea is a class name that we spread all over our site - clicking
on it will trigger the movie.
- line 5: openLightBox – on our site the movie will be opened in a light
box.
- line 11: the videoUrl, will be seen in the configured size. allowfullscreen is false
by default. read
more here
- line 12: flashVars will be used here in order to have our movie start as
our light-box will be opened.
- line 13: The placeholder we want to replace while loading the movie
- line 14: Add reference to the swfObject.js in order to have its instance(read bellow).
The createSWF method is a low level API which enable combining with other Javascript
libraries.
in order to have this code running we must add script tag:
<script type="text/javascript" src="swfobject.js"></script>
Now, after having embedding SWF to our site - Let’s understand how to make this work on IIS and Apache.
So our mission is to have our website play a short intro movie.
Wiki Definition
“Progressive download is a term used to describe the transfer of digital media files from a server to a client , typically using the HTTP protocol when initiated from a computer. The consumer may begin playback of the media before the download is complete. The key difference between streaming media and progressive download is in how the digital media data is received and stored by the end user device that is accessing the digital media.”
Actually the “progressive download” feature implemented in most media players allows them to begin playing the file as soon as enough data received.
File formats: SWF VS. FLV
After this short explanation, we are ready to start:
In the next posts we will talk about steps 3 and 4.
For now you can keep reading about step 1 - here
Area 51 – GIS is a new place supported by the Stack Overflow to post your Qusetions and Answers about Geographic information systems. Part of the questions are talking about interesting issues like: Databases comparisons, Algorithms, New tools, GeoTagging, GeoJson, Kml, Map Caching layers etc.
Public beta will begin in 5 days.
Finally, after a long time I find time to upgrade my blog to the newly 2.3 version.
I had many problems installing this version Go-daddy, Monorail and SecurityException.
The last one was also the funny one, after Google-ing a little bit, I found this post by
Gabel one of my co-workers.
What’s new?
So first I created my self a new homepage which you can see here.
Second, you can track my reading-list, my twitter statuses and my projects (will be
published later).
Have fun.
Test methods must be written as production code.
While writing your tests you must act the same methods you write for your production
code which means:
This is a code you will probably find in your test projects
1: [Test]
2:
public
void GetCommentsByQuery_LookFormHmmmText_FindAtLeaseOne()
3: {
4: SvnLogParser
parser = new SvnLogParser();
5:
string textToSearch
= "Hmmm...";
6: var
results = parser.GetCommentsByQuery(comment => comment.Contains(textToSearch));
7: CollectionAssertExtensions.IsNotEmpty(results);
8: }
9:
10: [Test]
11:
public
void GetCommentsByQuery_LookFormBugText_FindAtLeastOne()
12: {
13: SvnLogParser
parser = new SvnLogParser();
14:
string textToSearch
= "bug";
15: var
results = parser.GetCommentsByQuery(comment => comment.Contains(textToSearch));
16: CollectionAssertExtensions.IsNotEmpty(results);
17: }
You can see that the two methods are pretty much the same, the only change is the
textToSearch variable.
There are some excuses for such duplication:
We, of course, can refactor this code, like this:
1: [Test]
2:
public
void GetCommentsByQuery_LookFormBugText_FindAtLeastOne()
3: {
4:
string textToSearch
= "bug";
5: GetCommentsByQuery_AssertAllItemsStartsWith(textToSearch);
6: }
7:
8:
9: [Test]
10:
public
void GetCommnentsByQuery_LookForHmmmText_VerifyInsideComment()
11: {
12:
string textToSearch
= "Hmmm...";
13: GetCommentsByQuery_AssertAllItemsStartsWith(textToSearch);
14: }
15:
16:
public
void GetCommentsByQuery_AssertAllItemsStartsWith(string textToSearch)
17: {
18: SvnLogParser
parser = new SvnLogParser();
19: var
results = parser.GetCommentsByQuery(comment => comment.StartsWith(textToSearch));
20:
21: CollectionAssertExtensions.AllItemsSatisfy(results,
res => res.Comment.StartsWith(textToSearch));
22: }
This is better when you think of clone detection: less identical rows and the logic
was extracted to one method.
But people might say that they can't see the AAA (Arrange, Act, Assert) and they want
it in one place,
Moreover, in such code sample, it is harder to find all the input parameters, cause
they will be spread all over the TestFixture methods.
NUnit 2.5 added TestCaseAttribute, this can help us write tests that are:
1: [TestCase("Hm...")]
2: [TestCase("bug")]
2: [TestCase("bug")]
3:
public
void GetCommentsByQuery_LookForText_FindAtLeastOne(string textToSearch)
4: {
5: SvnLogParser
parser = new SvnLogParser();
6: var
results = parser.GetCommentsByQuery(comment => comment.Contains(textToSearch));
7: CollectionAssertExtensions.IsNotEmpty(results);
8: }
Here you can avoid the duplication and you won't need to refactor your Tests to more
than one method, while you still see them running using the given parameter,
for example when the second parameter will fail you will see this output:
------ Test started: Assembly: App.Tests.dll ------
TestCase 'App.Tests.NewFolder1.SvnLogParserTests.GetCommentsByQuery_LookForText_FindAtLeastOne("Hm...")'
failed:
Expected: True
But was: False
C:\ShaniData\ProjectsByTitle\Delver\App.Tests\NewFolder1\SvnLogParserTests.cs(75,0): at App.Tests.NewFolder1.CollectionAssertExtensions.IsNotEmpty[T]
C:\ShaniData\ProjectsByTitle\Delver\App.Tests\NewFolder1\SvnLogParserTests.cs(33,0): at App.Tests.NewFolder1.SvnLogParserTests.GetCommentsByQuery_LookForText_Find...
4 passed, 1 failed, 0 skipped, took 0.78 seconds (NUnit 2.5).
The output will point the given method and the parameter used - which will ease finding
the error.
You can extend reading about the usage here
For more background about when we use this API you can read my last post about Rendering Objects to Html
Simple Rendering of query:
1: var
query = new StringTemplate("SELECT
$column$ FROM $table$;");
2: query.SetAttribute("column", "name");
3: query.SetAttribute("table", "User");
4: var
data = query.ToString();
1: var
group = new StringTemplateGroup("SimpleTemplates",@"C:\Templates\TemplateEngineTestCase");
2: var
query = group.GetInstanceOf("1_simple");
3: query.SetAttribute("column", "name");
4: query.SetAttribute("table", "User");
5: var
data = query.ToString();
//1_simple.st SELECT $column$ FROM $table$;
In the last template usage (1_simple.st) We bind the parameters using strings only. but we also have a better options: let's assume we wrote down such template:
//2_simpleObjects.st Full Name: $Person.FirstName$ - $Person.LastName$
But let's assume that we don't have the Person class\instance, we can simply write it using the anonymous types:
1: var
user = new {FirstName = "Shani",
LastName = "Raba"};
2: var
group = new StringTemplateGroup("OOTempaltes", @"C:\Templates\TemplateEngineTestCase");
3: var
query = group.GetInstanceOf("2_simpleObjects");
4:
5: query.SetAttribute("Person",
user);
Till now it is all pretty simple to implement by yourself, but the real issue here
is the List binding feature.
You can write such template:
//3_simpleLoop.st
$items: {num1|
<li>$num1$</li> }$
$end$
and bind the list using this code:
1: var
templateFolder = new StringTemplateGroup("SimpleLoopTemplates", @"C:\Tempaltes\TemplateEngineTestCase");
2: var
template = templateFolder.GetInstanceOf("3_simpleLoop");
3:
4: template.SetAttribute("items", new List<string>
{"Shani", "Doron", "Nati", "Yossi"});
Conclusion:
Dr. Alistair Cockburn will be in Israel.
I recommend you this user-group: Scrum
Event. come and learn from the best.
See you there.