Handling http errors

[mbojan]

Extracted from #17.

Internet-related errors, like timeouts etc. They are thrown by httr::GET, which is used in several places, but most importantly in while_oai, which is the core of list_* functions.

• Things like timeouts could be addressed by proper pre-configuring httr::GET (passing additional arguments through httr::config
• Perhaps it should be possible to add an optional sleep time between requests in while_oai.

[sckott]

... is passed through to while_oai() so i think the user can configure this themselves. or do you think we need more than ...?

[mbojan]

I think ... should be enough in most cases. I vaguely recall that at some point I was getting some errors and thought it was because I was making to many request too quickly, hence the second bullet above. However I think the problem was somewhere else in the end.

I believe we can close this one.

[sckott]

ok, thanks, closing