Collecting Social Media Data Two different methods: 1. Screen - PowerPoint PPT Presentation

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Collecting Social Media Data Two different methods: 1. Screen scraping: extract data from source code of website 2. Web APIs (application programming interface): use a set of structured https requests that return JSON or XML files Collecting

Collecting Social Media Data Two different methods: 1. Screen scraping: extract data from source code of website 2. Web APIs (application programming interface): use a set of structured https requests that return JSON or XML files
Collecting Social Media Data Two different methods: 1. Screen scraping: extract data from source code of website 2. Web APIs (application programming interface): use a set of structured https requests that return JSON or XML files Types of APIs: 1. RESTful APIs: queries for static information in current moment (e.g. user profiles, posts, etc.) 2. Streaming APIs: changes in users’ data in real time (e.g. new messages, deletions, etc.)
Collecting Social Media Data Two different methods: 1. Screen scraping: extract data from source code of website 2. Web APIs (application programming interface): use a set of structured https requests that return JSON or XML files Types of APIs: 1. RESTful APIs: queries for static information in current moment (e.g. user profiles, posts, etc.) 2. Streaming APIs: changes in users’ data in real time (e.g. new messages, deletions, etc.) Rate limits 1. Restrictions on number of API calls by user and period of time 2. APIs are expensive!
Connecting with an API Constructing a REST API call ◮ Baseline URL: http://graph.facebook.com/ ◮ Parameters: ?ids=barackobama,johnmccain
Connecting with an API Constructing a REST API call ◮ Baseline URL: http://graph.facebook.com/ ◮ Parameters: ?ids=barackobama,johnmccain Response often in JSON format. (example)
Connecting with an API Constructing a REST API call ◮ Baseline URL: http://graph.facebook.com/ ◮ Parameters: ?ids=barackobama,johnmccain Response often in JSON format. (example) Authentication ◮ Most common is an open standard called OAuth ◮ Connections without sharing username and password, only temporary tokens that can be refreshed ◮ httr package in R implements most cases (examples)
Twitter and Facebook R packages ◮ Twitter: twitteR for REST, streamR for Streaming ◮ Facebook: Rfacebook
Twitter and Facebook R packages ◮ Twitter: twitteR for REST, streamR for Streaming ◮ Facebook: Rfacebook Python: tweepy and facebook-sdk
Twitter and Facebook R packages ◮ Twitter: twitteR for REST, streamR for Streaming ◮ Facebook: Rfacebook Python: tweepy and facebook-sdk Open-source code released by SMaPP lab (GitHUB)
Twitter and Facebook R packages ◮ Twitter: twitteR for REST, streamR for Streaming ◮ Facebook: Rfacebook Python: tweepy and facebook-sdk Open-source code released by SMaPP lab (GitHUB) Integration with quanteda

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