BloggerApi.getPost (appkey, postid, username, password)
Functions that implement Blogger's XML-RPC API see http://www.blogger.com/developers/api/1_docs/ for further details blogger.getTemplate and blogger.setTemplate are not supported

Sourcecode in BloggerApi/bloggerAPI.js:
1:   function getPost(appkey, postid, username, password) {
2:      var usr = root.blogger.getUser(username, password);
3:      var entry = root.storiesByID.get(postid.toString());
4:      if (!entry)
5:         throw("Couldn't find the entry with id " + postid);
6:      try {
7:         entry.checkEdit(usr, entry.site.members.getMembershipLevel(usr));
8:      } catch (deny) {
9:         throw ("You're not allowed to edit the entry with id " + postid);
10:     }
11:     var result = new Object();
12:     result.content = entry.content.getProperty("text");
13:     result.userid = entry.creator.name;
14:     result.postid = entry._id;
15:     result.dateCreated = entry.createtime;
16:     return result;
17:  }