Contains the Concourse pipeline definition for building a line-server container
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package main
import (
"bytes"
"io"
"net/http"
"os"
"path"
"strings"
"github.com/zenazn/goji/web"
)
func fileServeHandler(c web.C, w http.ResponseWriter, r *http.Request) {
fileName := c.URLParams["name"]
filePath := path.Join(Config.filesDir, fileName)
err := checkFile(fileName)
if err == NotFoundErr {
notFoundHandler(c, w, r)
return
} else if err == BadMetadata {
oopsHandler(c, w, r, RespAUTO, "Corrupt metadata.")
return
}
if !Config.allowHotlink {
referer := r.Header.Get("Referer")
prefix := strings.TrimSuffix(Config.siteURL, "/")
if referer != "" && !strings.HasPrefix(referer, prefix) {
w.WriteHeader(403)
return
}
}
w.Header().Set("Content-Security-Policy", Config.fileContentSecurityPolicy)
http.ServeFile(w, r, filePath)
}
var staticCache = make(map[string][]byte)
func staticHandler(c web.C, w http.ResponseWriter, r *http.Request) {
path := r.URL.Path
if path[len(path)-1:] == "/" {
notFoundHandler(c, w, r)
return
} else {
if path == "/favicon.ico" {
path = "/static/images/favicon.gif"
}
filePath := strings.TrimPrefix(path, "/static/")
_, exists := staticCache[filePath]
if !exists {
file, err := staticBox.Open(filePath)
if err != nil {
notFoundHandler(c, w, r)
return
}
buf := bytes.NewBuffer(nil)
io.Copy(buf, file)
staticCache[filePath] = buf.Bytes()
}
w.Header().Set("Etag", timeStartedStr)
w.Header().Set("Cache-Control", "max-age=86400")
http.ServeContent(w, r, filePath, timeStarted, bytes.NewReader(staticCache[filePath]))
return
}
}
func checkFile(filename string) error {
filePath := path.Join(Config.filesDir, filename)
_, err := os.Stat(filePath)
if err != nil {
return NotFoundErr
}
expired, err := isFileExpired(filename)
if err != nil {
return err
}
if expired {
os.Remove(path.Join(Config.filesDir, filename))
os.Remove(path.Join(Config.metaDir, filename))
return NotFoundErr
}
return nil
}