forked from gregjones/httpcache
/
httpcache_test.go
352 lines (291 loc) · 10 KB
/
httpcache_test.go
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package httpcache
import (
"fmt"
. "launchpad.net/gocheck"
"net"
"net/http"
"testing"
"time"
)
var _ = fmt.Print
func Test(t *testing.T) { TestingT(t) }
type S struct {
listener net.Listener
client http.Client
transport *Transport
}
var _ = Suite(&S{})
func (s *S) SetUpSuite(c *C) {
t := NewMemoryCacheTransport()
client := http.Client{Transport: t}
s.transport = t
s.client = client
ln, err := net.Listen("tcp", ":9090")
if err != nil {
panic(err)
}
s.listener = ln
http.HandleFunc("/", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Cache-Control", "max-age=3600")
}))
http.HandleFunc("/nostore", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Cache-Control", "no-store")
}))
http.HandleFunc("/etag", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
etag := "124567"
if r.Header.Get("if-none-match") == etag {
w.WriteHeader(http.StatusNotModified)
}
w.Header().Set("etag", etag)
}))
http.HandleFunc("/lastmodified", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
lm := "Fri, 14 Dec 2010 01:01:50 GMT"
if r.Header.Get("if-modified-since") == lm {
w.WriteHeader(http.StatusNotModified)
}
w.Header().Set("last-modified", lm)
}))
http.HandleFunc("/varyaccept", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Cache-Control", "max-age=3600")
w.Header().Set("Content-Type", "text/plain")
w.Header().Set("Vary", "Accept")
w.Write([]byte("Some text content"))
}))
http.HandleFunc("/doublevary", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Cache-Control", "max-age=3600")
w.Header().Set("Content-Type", "text/plain")
w.Header().Set("Vary", "Accept, Accept-Language")
w.Write([]byte("Some text content"))
}))
http.HandleFunc("/varyunused", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Cache-Control", "max-age=3600")
w.Header().Set("Content-Type", "text/plain")
w.Header().Set("Vary", "X-Madeup-Header")
w.Write([]byte("Some text content"))
}))
go http.Serve(s.listener, nil)
}
func (s *S) TearDownSuite(c *C) {
err := s.listener.Close()
if err != nil {
panic(err)
}
}
func (s *S) TearDownTest(c *C) {
s.transport.Cache = NewMemoryCache()
}
func (s *S) TestGetOnlyIfCachedHit(c *C) {
req, err := http.NewRequest("GET", "http://localhost:9090/", nil)
c.Assert(err, IsNil)
resp, err := s.client.Do(req)
defer resp.Body.Close()
c.Assert(resp.Header.Get(XFromCache), Equals, "")
req2, err2 := http.NewRequest("GET", "http://localhost:9090/", nil)
req2.Header.Add("cache-control", "only-if-cached")
resp2, err2 := s.client.Do(req)
defer resp2.Body.Close()
c.Assert(err2, IsNil)
c.Assert(resp2.Header.Get(XFromCache), Equals, "1")
c.Assert(resp2.StatusCode, Equals, 200)
}
func (s *S) TestGetOnlyIfCachedMiss(c *C) {
req, err := http.NewRequest("GET", "http://localhost:9090/", nil)
req.Header.Add("cache-control", "only-if-cached")
resp, err := s.client.Do(req)
defer resp.Body.Close()
c.Assert(err, IsNil)
c.Assert(resp.Header.Get(XFromCache), Equals, "")
c.Assert(resp.StatusCode, Equals, 504)
}
func (s *S) TestGetNoStoreRequest(c *C) {
req, err := http.NewRequest("GET", "http://localhost:9090/", nil)
req.Header.Add("Cache-Control", "no-store")
resp, err := s.client.Do(req)
defer resp.Body.Close()
c.Assert(err, IsNil)
c.Assert(resp.Header.Get(XFromCache), Equals, "")
resp2, err2 := s.client.Do(req)
defer resp2.Body.Close()
c.Assert(err2, IsNil)
c.Assert(resp2.Header.Get(XFromCache), Equals, "")
}
func (s *S) TestGetNoStoreResponse(c *C) {
req, err := http.NewRequest("GET", "http://localhost:9090/nostore", nil)
resp, err := s.client.Do(req)
defer resp.Body.Close()
c.Assert(err, IsNil)
c.Assert(resp.Header.Get(XFromCache), Equals, "")
resp2, err2 := s.client.Do(req)
defer resp2.Body.Close()
c.Assert(err2, IsNil)
c.Assert(resp2.Header.Get(XFromCache), Equals, "")
}
func (s *S) TestGetWithEtag(c *C) {
req, err := http.NewRequest("GET", "http://localhost:9090/etag", nil)
resp, err := s.client.Do(req)
defer resp.Body.Close()
c.Assert(err, IsNil)
c.Assert(resp.Header.Get(XFromCache), Equals, "")
resp2, err2 := s.client.Do(req)
defer resp2.Body.Close()
c.Assert(err2, IsNil)
c.Assert(resp2.Header.Get(XFromCache), Equals, "1")
}
func (s *S) TestGetWithLastModified(c *C) {
req, err := http.NewRequest("GET", "http://localhost:9090/lastmodified", nil)
resp, err := s.client.Do(req)
defer resp.Body.Close()
c.Assert(err, IsNil)
c.Assert(resp.Header.Get(XFromCache), Equals, "")
resp2, err2 := s.client.Do(req)
defer resp2.Body.Close()
c.Assert(err2, IsNil)
c.Assert(resp2.Header.Get(XFromCache), Equals, "1")
}
func (s *S) TestGetWithVary(c *C) {
req, err := http.NewRequest("GET", "http://localhost:9090/varyaccept", nil)
req.Header.Set("Accept", "text/plain")
resp, err := s.client.Do(req)
defer resp.Body.Close()
c.Assert(err, IsNil)
c.Assert(resp.Header.Get("Vary"), Equals, "Accept")
resp2, err2 := s.client.Do(req)
defer resp2.Body.Close()
c.Assert(err2, IsNil)
c.Assert(resp2.Header.Get(XFromCache), Equals, "1")
req.Header.Set("Accept", "text/html")
resp3, err3 := s.client.Do(req)
defer resp3.Body.Close()
c.Assert(err3, IsNil)
c.Assert(resp3.Header.Get(XFromCache), Equals, "")
req.Header.Set("Accept", "")
resp4, err4 := s.client.Do(req)
defer resp4.Body.Close()
c.Assert(err4, IsNil)
c.Assert(resp4.Header.Get(XFromCache), Equals, "")
}
func (s *S) TestGetWithDoubleVary(c *C) {
req, err := http.NewRequest("GET", "http://localhost:9090/doublevary", nil)
req.Header.Set("Accept", "text/plain")
req.Header.Set("Accept-Language", "da, en-gb;q=0.8, en;q=0.7")
resp, err := s.client.Do(req)
defer resp.Body.Close()
c.Assert(err, IsNil)
c.Assert(resp.Header.Get("Vary"), Not(Equals), "")
resp2, err2 := s.client.Do(req)
defer resp2.Body.Close()
c.Assert(err2, IsNil)
c.Assert(resp2.Header.Get(XFromCache), Equals, "1")
req.Header.Set("Accept-Language", "")
resp3, err3 := s.client.Do(req)
defer resp3.Body.Close()
c.Assert(err3, IsNil)
c.Assert(resp3.Header.Get(XFromCache), Equals, "")
req.Header.Set("Accept-Language", "da")
resp4, err4 := s.client.Do(req)
defer resp4.Body.Close()
c.Assert(err4, IsNil)
c.Assert(resp4.Header.Get(XFromCache), Equals, "")
}
func (s *S) TestGetVaryUnused(c *C) {
req, err := http.NewRequest("GET", "http://localhost:9090/varyunused", nil)
req.Header.Set("Accept", "text/plain")
resp, err := s.client.Do(req)
defer resp.Body.Close()
c.Assert(err, IsNil)
c.Assert(resp.Header.Get("Vary"), Not(Equals), "")
resp2, err2 := s.client.Do(req)
defer resp2.Body.Close()
c.Assert(err2, IsNil)
c.Assert(resp2.Header.Get(XFromCache), Equals, "1")
}
func (s *S) TestParseCacheControl(c *C) {
h := http.Header{}
for _ = range parseCacheControl(h) {
c.Fatal("cacheControl should be empty")
}
h.Set("cache-control", "no-cache")
cc := parseCacheControl(h)
c.Assert(cc["no-cache"], Equals, "1")
h.Set("cache-control", "no-cache, max-age=3600")
cc = parseCacheControl(h)
c.Assert(cc["no-cache"], Equals, "1")
c.Assert(cc["max-age"], Equals, "3600")
}
func (s *S) TestNoCacheRequestExpiration(c *C) {
respHeaders := http.Header{}
respHeaders.Set("Cache-Control", "max-age=7200")
reqHeaders := http.Header{}
reqHeaders.Set("Cache-Control", "no-cache")
c.Assert(getFreshness(respHeaders, reqHeaders), Equals, transparent)
}
func (s *S) TestNoCacheResponseExpiration(c *C) {
respHeaders := http.Header{}
respHeaders.Set("Cache-Control", "no-cache")
respHeaders.Set("Expires", "Wed, 19 Apr 3000 11:43:00 GMT")
reqHeaders := http.Header{}
c.Assert(getFreshness(respHeaders, reqHeaders), Equals, stale)
}
func (s *S) TestReqMustRevalidate(c *C) {
// not paying attention to request setting max-stale means never returning stale
// responses, so always acting as if must-revalidate is set
respHeaders := http.Header{}
reqHeaders := http.Header{}
reqHeaders.Set("Cache-Control", "must-revalidate")
c.Assert(getFreshness(respHeaders, reqHeaders), Equals, stale)
}
func (s *S) TestRespMustRevalidate(c *C) {
respHeaders := http.Header{}
respHeaders.Set("Cache-Control", "must-revalidate")
reqHeaders := http.Header{}
c.Assert(getFreshness(respHeaders, reqHeaders), Equals, stale)
}
func (s *S) TestFreshExpiration(c *C) {
now := time.Now()
respHeaders := http.Header{}
respHeaders.Set("date", now.Format(time.RFC1123))
respHeaders.Set("expires", now.Add(time.Duration(2)*time.Second).Format(time.RFC1123))
reqHeaders := http.Header{}
c.Assert(getFreshness(respHeaders, reqHeaders), Equals, fresh)
time.Sleep(3 * time.Second)
c.Assert(getFreshness(respHeaders, reqHeaders), Equals, stale)
}
func (s *S) TestMaxAge(c *C) {
now := time.Now()
respHeaders := http.Header{}
respHeaders.Set("date", now.Format(time.RFC1123))
respHeaders.Set("cache-control", "max-age=2")
reqHeaders := http.Header{}
c.Assert(getFreshness(respHeaders, reqHeaders), Equals, fresh)
time.Sleep(3 * time.Second)
c.Assert(getFreshness(respHeaders, reqHeaders), Equals, stale)
}
func (s *S) TestMaxAgeZero(c *C) {
now := time.Now()
respHeaders := http.Header{}
respHeaders.Set("date", now.Format(time.RFC1123))
respHeaders.Set("cache-control", "max-age=0")
reqHeaders := http.Header{}
c.Assert(getFreshness(respHeaders, reqHeaders), Equals, stale)
}
func (s *S) TestBothMaxAge(c *C) {
now := time.Now()
respHeaders := http.Header{}
respHeaders.Set("date", now.Format(time.RFC1123))
respHeaders.Set("cache-control", "max-age=2")
reqHeaders := http.Header{}
reqHeaders.Set("cache-control", "max-age=0")
c.Assert(getFreshness(respHeaders, reqHeaders), Equals, stale)
}
func (s *S) TestMinFreshWithExpires(c *C) {
now := time.Now()
respHeaders := http.Header{}
respHeaders.Set("date", now.Format(time.RFC1123))
respHeaders.Set("expires", now.Add(time.Duration(2)*time.Second).Format(time.RFC1123))
reqHeaders := http.Header{}
reqHeaders.Set("cache-control", "min-fresh=1")
c.Assert(getFreshness(respHeaders, reqHeaders), Equals, fresh)
reqHeaders = http.Header{}
reqHeaders.Set("cache-control", "min-fresh=2")
c.Assert(getFreshness(respHeaders, reqHeaders), Equals, stale)
}