JSON::ParserError on gateway timeout when proxy responds with HTML

[bjeanes]

The root cause of this is because, in multiple places, the client tries to decode the body before checking the response code and appears to assume that any non-200 will comply with the shape {"error": "..."} which is not the case across the board.

zammad-api-client-ruby/lib/zammad_api/list_base.rb

Lines 68 to 69 in d897889

	data = JSON.parse(response.body)
	if response.status != 200

zammad-api-client-ruby/lib/zammad_api/resources/base.rb

Lines 42 to 45 in d897889

	if response.body.to_s != '' && response.body.to_s != ' '
	data = JSON.parse(response.body)
	end
	return true if response.status == 200

zammad-api-client-ruby/lib/zammad_api/resources/base.rb

Lines 77 to 80 in d897889

	data = JSON.parse(response.body)
	if response.status != 200
	raise "Can't find object (#{self.class.name}): #{data['error']}"
	end

zammad-api-client-ruby/lib/zammad_api/resources/base.rb

Lines 107 to 108 in d897889

	attributes = JSON.parse(response.body)
	return attributes if response.status == 201

zammad-api-client-ruby/lib/zammad_api/resources/base.rb

Lines 118 to 120 in d897889

	attributes = JSON.parse(response.body)
	return attributes if response.status == 200

zammad-api-client-ruby/lib/zammad_api/resources/ticket.rb

Lines 6 to 9 in d897889

	data = JSON.parse(response.body)
	if response.status != 200
	raise "Can't get articles (#{self.class.name}): #{data['error']}"
	end

It would be preferable to check the response code first and extract the data["error"] in a failsafe way (e.g. by rescuing on the JSON::ParserError