From b425e6ff28fe88e41415f3725fa8aac448462d30 Mon Sep 17 00:00:00 2001 From: Darko Luketic Date: Fri, 1 Nov 2019 14:25:11 +0100 Subject: [PATCH] added cache --- README.md | 6 +- cmd/serve.go | 9 +-- go.mod | 2 + go.sum | 159 ++++++++++++++++++++++++++++++++++++++++++++++ server/handler.go | 90 +++++++++++++++++++------- 5 files changed, 235 insertions(+), 31 deletions(-) create mode 100644 go.sum diff --git a/README.md b/README.md index 9b4891c..a4b3c07 100644 --- a/README.md +++ b/README.md @@ -2,7 +2,7 @@ a simple proxy for rendering SPA -WIP +## how to use ### configure nginx @@ -37,6 +37,6 @@ see also https://gist.github.com/thoop/8165802 } ``` -### TODO: +### configure -- cache for already fetched sites \ No newline at end of file +documentation WIP \ No newline at end of file diff --git a/cmd/serve.go b/cmd/serve.go index 6c87de5..833548b 100644 --- a/cmd/serve.go +++ b/cmd/serve.go @@ -16,12 +16,10 @@ limitations under the License. package cmd import ( - "fmt" "github.com/dalu/chromedom/server" "github.com/spf13/cobra" - "net" "net/http" - "os" + "time" ) // serveCmd represents the serve command @@ -32,13 +30,15 @@ var serveCmd = &cobra.Command{ RunE: func(cmd *cobra.Command, args []string) error { binary := cmd.Flag("binary").Value.String() s := http.DefaultServeMux - h := server.NewHandler(binary) + h := server.NewHandler(binary, 30*time.Minute) s.Handle("/", h) return http.ListenAndServe(":9292", s) // return RunUnix("/tmp/chromedom.sock", s) }, } +/* + func RunUnix(file string, engine *http.ServeMux) (err error) { fmt.Printf("Listening and serving HTTP on unix:/%s", file) os.Remove(file) @@ -51,6 +51,7 @@ func RunUnix(file string, engine *http.ServeMux) (err error) { err = http.Serve(listener, engine) return } +*/ func init() { rootCmd.AddCommand(serveCmd) diff --git a/go.mod b/go.mod index 0b2aa5d..d4554ea 100644 --- a/go.mod +++ b/go.mod @@ -3,7 +3,9 @@ module github.com/dalu/chromedom go 1.13 require ( + github.com/allegro/bigcache v1.2.1 github.com/mitchellh/go-homedir v1.1.0 + github.com/sirupsen/logrus v1.2.0 github.com/spf13/cobra v0.0.5 github.com/spf13/viper v1.4.0 ) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..45c6ffd --- /dev/null +++ b/go.sum @@ -0,0 +1,159 @@ +cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ= +github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU= +github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU= +github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc= +github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0= +github.com/allegro/bigcache v1.2.1 h1:hg1sY1raCwic3Vnsvje6TT7/pnZba83LeFck5NrFKSc= +github.com/allegro/bigcache v1.2.1/go.mod 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h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= diff --git a/server/handler.go b/server/handler.go index deabf10..792ddfe 100644 --- a/server/handler.go +++ b/server/handler.go @@ -20,29 +20,26 @@ import ( "fmt" "net/http" "os/exec" + "syscall" + "time" + + "github.com/allegro/bigcache" + "github.com/sirupsen/logrus" ) type Handler struct { - binary string + binary string + baseParams []string + uid int + logger *logrus.Logger + cache *bigcache.BigCache } -func NewHandler(binary string) *Handler { +func NewHandler(binary string, eviction time.Duration) *Handler { h := new(Handler) h.binary = binary - return h -} - -func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) { - b, e := h.FetchDom(fmt.Sprintf("https://%s%s", r.Host, r.RequestURI)) - if e != nil { - fmt.Fprintln(w, e.Error()) - return - } - w.Write(b.Bytes()) -} - -func (h *Handler) FetchDom(url string) (*bytes.Buffer, error) { - params := []string{ + h.uid = syscall.Getuid() + h.baseParams = []string{ "--disable-client-side-phishing-detection", "--disable-cloud-import", "--disable-default-apps", @@ -63,15 +60,60 @@ func (h *Handler) FetchDom(url string) (*bytes.Buffer, error) { "--headless", "--disable-gpu", "--disable-software-rasterizer", - "--no-sandbox", "--dump-dom", - url, } - cmd := exec.Command(h.binary, params...) - buf := bytes.NewBuffer(nil) - cmd.Stdout = buf - if e := cmd.Run(); e != nil { - return nil, e + h.logger = logrus.StandardLogger() + cacheConf := bigcache.DefaultConfig(eviction) + cacheConf.HardMaxCacheSize = 500 * 1024 * 1024 // 500MB + cache, e := bigcache.NewBigCache(cacheConf) + if e != nil { + h.logger.Fatal(e.Error()) + return nil } - return buf, nil + h.cache = cache + return h +} + +func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) { + b, e := h.FetchDom(fmt.Sprintf("https://%s%s", r.Host, r.RequestURI)) + if e != nil { + h.logger.Error(e) + if _, err := fmt.Fprintln(w, e.Error()); err != nil { + h.logger.Error(e) + return + } + return + } + if _, e := w.Write(b.Bytes()); e != nil { + h.logger.Error(e) + } + +} + +func (h *Handler) FetchDom(url string) (*bytes.Buffer, error) { + b, e := h.cache.Get(url) + if e != nil { + if e == bigcache.ErrEntryNotFound { + var params []string + if h.uid == 0 { + params = append(h.baseParams, "--no-sandbox") + } else { + params = h.baseParams + } + params = append(params, url) + cmd := exec.Command(h.binary, params...) + buf := bytes.NewBuffer(nil) + cmd.Stdout = buf + if e := cmd.Run(); e != nil { + return nil, e + } + if e := h.cache.Set(url, buf.Bytes()); e != nil { + h.logger.Error(e) + } + return buf, nil + } else { + return nil, e + } + } + return bytes.NewBuffer(b), nil }