Bug 21109

Summary:	oai.pl returns invalid resumptionToken cursor
Product:	Koha	Reporter:	Pablo AB <pablo.bianchi>
Component:	Web services	Assignee:	Bugs List <koha-bugs>
Status:	NEW ---	QA Contact:	Testopia <testopia>
Severity:	minor
Priority:	P4
Version:	Main
Hardware:	All
OS:	All
See Also:	https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=17785
Change sponsored?:	---	Patch complexity:	---
Documentation contact:		Documentation submission:
Text to go in the release notes:		Version(s) released in:
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Bug Depends on:
Bug Blocks:	21102

Description Pablo AB 2018-07-24 00:20:22 UTC

Tested with https://github.com/zimeon/oaipmh-validator
and curl -s "baseURL?verb=ListRecords&metadataPrefix=oai_dc" | xmllint --format - | grep resumptionToken

### Checking for correct use of resumptionToken (if used)
REQUEST: baseURL?verb=ListRecords&metadataPrefix=oai_dc GET
FAIL:    A cursor value was supplied with the resumptionToken but it did not have the correct value zero for the first response. The value was '50'.

This value is OAI-PMH:MaxCount syspref.

_cursor_ indicate the number of previous replies have already delivered: "cursor -- a count of the number of elements of the complete list thus far returned (i.e. cursor starts at 0)."
See https://www.openarchives.org/OAI/openarchivesprotocol.html#FlowControl
See https://www.openarchives.org/OAI/2.0/guidelines-harvester.htm#resumptionToken