rest_overview.tex

\section{REST}

\centeredFrame{REST}
\centeredFrame{\alert{RE}presentational \alert{S}tate \alert{T}ransfer}

\imageFrame{images/homer-on-couch.jpg}

\itemizedFrame{introduced by Roy Fielding, who also worked on the following specifications:}{
 \item URI
 \item HTTP
 \item HTML
}

\centeredFrame{very short demo} % fetch status in XML from a browser

% RESOURCES - nouns
\centeredFrame{URI}
\centeredFrame{resources}
\centeredFrame{uniquely addressable using URIs}
\centeredFrame{http://localhost/users/1}
\centeredFrame{http://localhost/users/1/statuses/1}
\centeredFrame{http://localhost/users}
\centeredFrame{http://localhost/users/1/statuses}

% HTTP - verbs
\centeredFrame{HTTP}
\centeredFrame{CRUD}
\begin{frame}
  \frametitle{\insertsection}
  \begin{columns}
    \begin{column}{2cm}
      \begin{center}ACTION\end{center}
      CREATE\\
      READ\\
      UPDATE\\
      DELETE
    \end{column}    
    \begin{column}{2cm}      
    \end{column}
    \begin{column}{2cm}      
    \end{column}
  \end{columns}
\end{frame}

\begin{frame}
  \frametitle{\insertsection}
  \begin{columns}
    \begin{column}{2cm}
      \begin{center}ACTION\end{center}
      CREATE\\
      READ\\
      UPDATE\\
      DELETE
    \end{column}    
    \begin{column}{2cm}
      \begin{center}SQL\end{center}
      INSERT\\
      SELECT\\
      UPDATE\\
      DELETE
    \end{column}
    \begin{column}{2cm}      
    \end{column}
  \end{columns}
\end{frame}

\begin{frame}
  \frametitle{\insertsection}
  \begin{columns}
    \begin{column}{2cm}
      \begin{center}ACTION\end{center}
      CREATE\\
      READ\\
      UPDATE\\
      DELETE
    \end{column}    
    \begin{column}{2cm}
      \begin{center}SQL\end{center}
      INSERT\\
      SELECT\\
      UPDATE\\
      DELETE
    \end{column}
    \begin{column}{2cm}   
      \begin{center}HTTP\end{center}
      \uncover<2->{POST}\\
      \uncover<3->{GET}\\
      \uncover<4->{PUT}\\
      \uncover<5->{DELETE}
    \end{column}
  \end{columns}
\end{frame}

\itemizedFrame{think of REST as a sentence:}{
\item HTTP actions are verbs
\item resources' URIs are nouns
}

\begin{frame}
  \frametitle{\insertsection}
  \begin{columns}
    \begin{column}{.3\textwidth}
      \begin{flushright}
      \uncover<2->{POST\\}
      GET\\
      PUT\\
      DELETE
      \end{flushright}
    \end{column}    
    \begin{column}{.7\textwidth}
      \begin{flushleft}
      \uncover<2->{http://localhost/users\\}
      http://localhost/users/1\\
      http://localhost/users/1\\
      http://localhost/users/1\\
      \end{flushleft}
    \end{column}    
    \end{columns}
\end{frame}

\centeredFrame{uniform interface to interact with resources}

\begin{frame}
  \frametitle{\insertsection}
  \begin{columns}
    \begin{column}{.3\textwidth}
      \begin{flushright}
      POST\\
      GET\\
      PUT\\
      DELETE
      \end{flushright}
    \end{column}    
    \begin{column}{.7\textwidth}
      \begin{flushleft}
      http://localhost/users/1/statuses\\
      http://localhost/users/1/statuses/1\\
      http://localhost/users/1/statuses/1\\
      http://localhost/users/1/statuses/1\\
      \end{flushleft}
    \end{column}    
  \end{columns}
\end{frame}

% REPRESENTATION
\centeredFrame{resources can have many representations}
\imageFrame{images/cohen-representations.jpg}

\begin{frame}
  \frametitle{\insertsection}
  \begin{center}
  ``Get XML representation of user with ID 1''
  \end{center}
  \begin{columns}
    \begin{column}{.2\textwidth}
      \begin{flushright}
      GET\\
      GET
      \end{flushright}
    \end{column}    
    \begin{column}{.8\textwidth}
      \begin{flushleft}
      http://localhost/users/1\alert{.xml}\\
      \alert{Accept: application/xml} http://localhost/users/1
      \end{flushleft}
    \end{column}    
  \end{columns}
\end{frame}

\begin{frame}
  \frametitle{\insertsection}
  \begin{center}
  ``Get JSON representation of user with ID 1''
  \end{center}
  \begin{columns}
    \begin{column}{.2\textwidth}
      \begin{flushright}
      GET\\
      GET
      \end{flushright}
    \end{column}    
    \begin{column}{.8\textwidth}
      \begin{flushleft}
      http://localhost/users/1\alert{.json}\\
      \alert{Accept: application/json} http://localhost/users/1
      \end{flushleft}
    \end{column}    
  \end{columns}
\end{frame}

\begin{frame}
  \frametitle{\insertsection}
  \begin{center}
  ``Get HTML representation of user with ID 1''
  \end{center}
  \begin{columns}
    \begin{column}{.2\textwidth}
      \begin{flushright}
      GET\\
      GET
      \end{flushright}
    \end{column}    
    \begin{column}{.8\textwidth}
      \begin{flushleft}
      http://localhost/users/1\alert{.html}\\
      \alert{Accept: text/html} http://localhost/users/1
      \end{flushleft}
    \end{column}    
  \end{columns}
\end{frame}

\begin{frame}
  \frametitle{\insertsection}
  \begin{center}
  ``Get vCard representation of user with ID 1''
  \end{center}
  \begin{columns}
    \begin{column}{.2\textwidth}
      \begin{flushright}
      GET\\
      GET
      \end{flushright}
    \end{column}    
    \begin{column}{.8\textwidth}
      \begin{flushleft}
      http://localhost/users/1\alert{.vcf}\\
      \alert{Accept: text/x-vCard} http://localhost/users/1
      \end{flushleft}
    \end{column}    
  \end{columns}
\end{frame}

\centeredFrame{REST is not a standard\\it's a style of software architecture}