When using filteredStream how can I be sure that the tweets won't be duplicated?
The streams in Twitter does not send duplicates. They can send information about a tweet being deleted, but they will not send duplicates.
Also, are there any other ways to harvest old tweets..
Unfortunately I have never heard of such a solution, and I investigated this subject when I was doing research.
You can get old tweets from an external provider (Gnip or Datashift) but you will have to pay to use these services.
Linvi
The streams in Twitter does not send duplicates. They can send information about a tweet being deleted, but they will not send duplicates.
Also, are there any other ways to harvest old tweets..
Unfortunately I have never heard of such a solution, and I investigated this subject when I was doing research.
You can get old tweets from an external provider (Gnip or Datashift) but you will have to pay to use these services.
Linvi