{Pharo Mooc}

15. Challenge 3 - Solution

Two little challenges:

First, the web site http://api.geonames.org/countryInfoJSON gives information in JSON about countries and you should extract the capitals. You can use the 'demo' and '' as login and password.
Second, the web site http://www.omdbapi.com/ offers an api to get information about movies. For example using t allows one to specify the title of a movie. Define a query to get the poster of 'The Terminator'.

15.0.1. Hints:

Have a look at ZnEasy or ZnClient.
To get the contents of an HTML request, send it the message contents.
To parse and convert a string representing JSON into Pharo collection, use the STON class (check the class side).
To pass a binding to a request, use the message queryAt:put:.
Using the inspector is a good idea to explore objects and query results.

The Poster of Terminator in a Pharo Inspector.

15.0.2. Solutions

15.0.2.1. Getting the Capitals

((STON fromString: (
    ZnEasy
        get: 'http://api.geonames.org/countryInfoJSON'
        username: 'demo'
        password: '') contents) at: #geonames) collect: [ : d | d at: #capital ]

15.0.2.2. Get poster of The Terminator movie

(ZnEasy getJpeg: ((STON fromString:
    (ZnClient new
        url: 'http://www.omdbapi.com/';
        queryAt: 't' put: 'The Terminator';
        get;
        contents)) at: #Poster)) inspect

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