(Another) Assignment Q&A

Appreciating the context … orWhat are we trying to do?

… building an application using external services… or a “service oriented” application

Source : Zdnet

Minimum Requirements / Deliverables (relaxed version)

3 / 4 components depending on group sizeo weather componento news componento a map componento one other (individual)

1 configuration file2 documentation file (xml – structure & schema yet to be published)using any or all of : php, xhtml, xml, kml, rss, css, javascript, yahoo-pipes,csv

BRISTOL / BORDEAUX example

How? crunch rss feeds

Source : yahoo weather rss feeds

Bristol : http://weather.yahooapis.com/forecastrss?p=UKXX0025&u=f

Bordeaux : http://weather.yahooapis.com/forecastrss?p=FRIF0476&u=f

(or use yahoo-pipes)

BRISTOL / BORDEAUX example

example using php & simplexml()

view commented code run code

require_once('utility_lib.php');

$url = 'http://weather.yahooapis.com/forecastrss?p=UKXX0025&u=f';

$rss = @simplexml_load_string(get_file($url));

if($rss) { foreach($rss->channel->item as $item) { echo $item->title.'<br/>'; $ns = $item->children('http://xml.weather.yahoo.com/ns/rss/1.0'); echo (string) $ns->condition->attributes()->text.'<br/>'; echo (string) $ns->condition->attributes()->temp.'&deg;F<br/>'; echo (string) $ns->condition->attributes()->date.'<br/>'; }} else echo "Can't get Bristol Weather Yahoo RSS!";

http://www.webservicex.net/

http://www.webservicex.net/globalweather.asmx/GetWeather?CityName=Bordeaux&CountryName=France

http://www.webservicex.net/globalweather.asmx/GetWeather?CityName=Bristol&CountryName=United Kingdom

example using php & simplexml()

Webservicex REST service: (notoriously unreliable – yahoo weather might be better)

BRISTOL / BORDEAUX example

BRISTOL / BORDEAUX example

<?xml version="1.0" encoding="utf-8" ?> <string xmlns="http://www.webserviceX.NET"> <?xml version="1.0" encoding="utf-16"?> <CurrentWeather> <Location>Bordeaux / Merignac, France (LFBD) 44-50N 000-42W 61M</Location> <Time>Nov 26, 2010 - 04:00 AM EST / 2010.11.26 0900 UTC</Time> <Wind> from the SSW (210 degrees) at 2 MPH (2 KT):0</Wind> <Visibility> greater than 7 mile(s):0</Visibility> <Temperature> 35 F (2 C)</Temperature> <DewPoint> 35 F (2 C)</DewPoint> <RelativeHumidity> 100%</RelativeHumidity> <Pressure> 29.91 in. Hg (1013 hPa)</Pressure> <Status>Success</Status> </CurrentWeather></string> </CurrentWeather></string>

Webservicex REST service response (Bordeaux weather) :

require_once('utility_lib.php');

$url = 'http://www.webservicex.net/globalweather.asmx/GetWeather?CityName=Bordeaux&CountryName=France';

$file = get_file($url);

preg_match('/(&lt;Current.*?&lt;\/CurrentWeather&gt;)/s', $file, $matches);

$xml = simplexml_load_string(html_entity_decode($matches[0]));

echo $xml->Location.'<br/>';echo $xml->Time.'<br/>';echo $xml->Wind.'<br/>';echo $xml->Temperature.'<br/>';

view commented code run code BRISTOL / BORDEAUX example

Process webservicex REST service response (Bordeaux weather) :

Getting and processing news feeds :Sources:Bristol (source: BBC): http://newsrss.bbc.co.uk/rss/local/bristol/front_page/rss.xml

Bordeaux (source: Yahoo News Service):http://news.search.yahoo.com/rss?ei=UTF-8&p=france+bordeaux+news&fr=news-us-ss

BRISTOL / BORDEAUX example

note keywords

$url = 'http://news.search.yahoo.com/rss?ei=UTF-8&p=france+bordeaux+news&fr=news-us-ss';

$rss = @simplexml_load_string(get_file($url), 'SimpleXMLElement', LIBXML_NOCDATA);

if($rss) { foreach($rss->channel->item as $item) { echo '<a href=\''.$item->link.'\'>'.$item->title.'</a><br/>'; }} else echo "Can't get Bristol Weather Yahoo RSS!";

view commented code run code

PHP script to get Bordeaux news:

Google static maps:

http://maps.google.com/maps/api/staticmap

?center=Bordeaux,France&zoom=15&size=800x480&sensor=false

centre of map zoom size size

flickr photos (from public area):

http://www.flickr.com/services/feeds/photos_public.gne

?tags=bristol,cathedral,history&tagmode=all

tags (comma delimited) include all tags

putting it all together:

i) set up a configuration file holding paths, api-keys and other dataview the code for dsa_config.php

ii) build a utility file holding functions and other common codeview the code for dsa_utility.php

iii) build a php a script to bring it all together view the code for index.php

Run the example application here:

http://www.cems.uwe.ac.uk/~p-chatterjee/php/dsa/index.php

registering your group:

- a group registration application will be made available Monday 23rd January on

- you will need to register your group with this application

- the application will assign your group an id

- note that without registration and without a group id – your work cannot be marked!!