More streams

[nfroidure]

Some driver could be enhanced by getting their response streamable :

• fslike drivers : Create a RestFsResponseStream that takes a list of files (with one file for single fs drivers) and ouput them using fread instead of file_get_contents.
• dblike/rowlike drivers : for drivers outputting datas that can be included in a CSV file with no loss should use a RestRowResponseStream object for sending response. For db, it should take in argument the fields list and the request (like the RestResponseSqlToCsv that should extend the newly created class)
• varstreams : a RestVarResponseStream class should be used to output varstreams
• templates : could also be streamed someday.

[nfroidure]

Files : https://github.com/nfroidure/Rest4/commit/b56cd2df26ce5994fcd71003b91521cee81815e8 Templates : https://github.com/nfroidure/Rest4/commit/c3f43ddc20a36533c0c9bf887f207aad9aa1bc67 Varstream not done by choice : https://github.com/nfroidure/Rest4/commit/93e82d9f57a0ef7d6a21017656f072bab49debdc