Error when the webapi baseUrl has a trailing slash in `exportCohortDefinitionSet`

[MaximMoinat]

The following gives a http error 404 ‘Resource not found’: exportCohortDefinitionSet(baseUrl = 'http://localhost:8080/WebAPI/', cohortIds = cohortIds)

After a lot of searching on the OHDSI forums, I found that this caused by the trailing slash in the given WebApi URL (i.e. baseUrl = 'http://localhost:8080/WebAPI' does work). This is very hard to figure out as the error message is very generic. Also, the method documentation does not explicitly say that the url should be given without a slash.

It would be great if this case can be better handled. I see two options:

• return warning that a trailing slash should be removed
• always strip the trailing slashes from the baseUrl (not sure if this has unwanted side-effects)

[MaximMoinat]

Footnote: Atlas->Configuration gives the WebAPI with a trailing slash. This is probably where many people find their WebAPI url, so many will add the trailing slash.

[MaximMoinat]

There is already a '.checkBaseUrl' function that does exactly this. However, this is not called in the exportCohortDefinitonSet function