func (h *gorouterHandler) ServeHTTP(res http.ResponseWriter, req *http.Request) {
// The X-Vcap-Request-Id must be set before the request is passed into the
// dropsonde InstrumentedHandler
router_http.SetVcapRequestIdHeader(req, h.logger)
h.handler.ServeHTTP(res, req)
}
const b3_id_regex = `^[[:xdigit:]]{16}$`
var _ = Describe("Headers", func() {
Describe("SetVcapRequestIdHeader", func() {
var (
logger lager.Logger
req *http.Request
)
BeforeEach(func() {
logger = lagertest.NewTestLogger("headers-test")
var err error
req, err = http.NewRequest("GET", "test.endpoint", nil)
Expect(err).ToNot(HaveOccurred())
})
JustBeforeEach(func() {
commonhttp.SetVcapRequestIdHeader(req, logger)
})
Context("when X-Vcap-Request-Id is not set", func() {
It("sets the X-Vcap-Request-Id header", func() {
reqID := req.Header.Get(commonhttp.VcapRequestIdHeader)
Expect(reqID).ToNot(BeEmpty())
Expect(reqID).To(MatchRegexp(uuid_regex))
})
It("logs the header", func() {
reqID := req.Header.Get(commonhttp.VcapRequestIdHeader)
Expect(logger).To(gbytes.Say("vcap-request-id-header-set"))
Expect(logger).To(gbytes.Say(reqID))
})