(Ruby) Read a Single Facebook Post

Demonstrates how to read the contents of a single Facebook post. A post is an individual entry in a profile's feed. The profile could be a user, page, app, or group.

Chilkat Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

# This example assumes a previously obtained an access token
oauth2 = Chilkat::CkOAuth2.new()
oauth2.put_AccessToken("FACEBOOK-ACCESS-TOKEN")

rest = Chilkat::CkRest.new()

# Connect to Facebook...
success = rest.Connect("graph.facebook.com",443,true,true)
if (success != true)
    print rest.lastErrorText() + "\n";
    exit
end

# Provide the authentication credentials (i.e. the access key)
rest.SetAuthOAuth2(oauth2)

# This example assumes a post id was already retrieved.
# For example, it could've been retrieved by reading the user's feed:
# See Parsing the Facebook User Feed for code showing how to parse the JSON feed content.

postId = "10224048320139890_10210156138515282"

sbPath = Chilkat::CkStringBuilder.new()
sbPath.Append("/v2.7/")
sbPath.Append(postId)

# Select the fields we want.
# This example will select almost all the possible fields.
# See https://developers.facebook.com/docs/graph-api/reference/post/
rest.AddQueryParam("fields","id,message,created_time,caption,description,from,link,name,object_id,picture,place,privacy,properties,shares,source,status_type,story,targeting,to,type,updated_time,with_tags")

responseJson = rest.fullRequestNoBody("GET",sbPath.getAsString())
if (rest.get_LastMethodSuccess() != true)
    print rest.lastErrorText() + "\n";
    exit
end

json = Chilkat::CkJsonObject.new()
json.put_EmitCompact(false)
json.Load(responseJson)

# Show the JSON in human-readable format.
print json.emit() + "\n";

# A sample JSON response is shown here.  
# { 
#   "id": "12345678901234567_12345678900000004",
#   "message": "Ignore my posts -- I'm doing some testing for Facebook related programming...",
#   "created_time": "2016-09-29T20:46:18+0000",
#   "from": { 
#     "name": "John Doe",
#     "id": "12345678901234567"
#   },
#   "link": "https:\/\/www.facebook.com\/photo.php?fbid=10210199026247451&set=a.1237223526054.2038240.1094202869&type=3",
#   "object_id": "10210139026347451",
#   "picture": "https:\/\/scontent.xx.fbcdn.net\/v\/t1.0-9\/14462791_10210199026647451_7830642117574407060_n.jpg?oh=a7f9ed10ce9cd81a82adeb541c60e2e2&oe=58ABB195",
#   "privacy": { 
#     "allow": "",
#     "deny": "",
#     "description": "Public",
#     "friends": "",
#     "value": "EVERYONE"
#   },
#   "status_type": "added_photos",
#   "type": "photo",
#   "updated_time": "2016-09-29T20:46:18+0000"
# }

# This is the code to parse some fields in the JSON response.
print "type: " + json.stringOf("type") + "\n";
print "message: " + json.stringOf("message") + "\n";
print "id: " + json.stringOf("id") + "\n";
print "link: " + json.stringOf("link") + "\n";
print "privacy descripton: " + json.stringOf("privacy.description") + "\n";

dtime = Chilkat::CkDateTime.new()
bLocalTime = true
dtime.SetFromTimestamp(json.stringOf("created_time"))
# dt is a CkDtObj
dt = dtime.GetDtObj(bLocalTime)
print dt.get_Month().to_s() + "/" + dt.get_Day().to_s() + "/" + dt.get_Year().to_s() + "  " + dt.get_Hour().to_s() + 
    ":" + dt.get_Minute().to_s() + "\n";