Add server-side validation to Subscription APIs

[levb]

Subscription management APIs,

mattermost-plugin-jira/server/subscribe.go

Line 527 in f0cd373

func httpChannelSubscriptions(p *Plugin, w http.ResponseWriter, r *http.Request) (int, error) {

, should implement server-side data validation, they currently rely on the webapp submitting valid data.

https://mattermost.atlassian.net/browse/MM-17903

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[shovanmaity]

hi @levb i would like to take it

[levb]

@imazik are you intending to finish this ticket, or should we put it back in the "Up for grabs"?

[RajatVaryani]

@levb Can you please elaborate more on the validations required on server side?

[levb]

@mickmister This was your ticket, can you please elaborate? Please edit the description as needed?

[jfrerich]

@mickmister, does server-side validation implementation still need to be added?

[mickmister]

@jfrerich Nope, closing per #432

[jfrerich]

@mickmister Awesome!