Contains the Concourse pipeline definition for building a line-server container
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package main
import (
"io"
"net/http"
"net/url"
"strconv"
"strings"
"github.com/andreimarcu/linx-server/backends"
"github.com/andreimarcu/linx-server/expiry"
"github.com/zenazn/goji/web"
)
func fileServeHandler(c web.C, w http.ResponseWriter, r *http.Request) {
fileName := c.URLParams["name"]
metadata, err := checkFile(fileName)
if err == backends.NotFoundErr {
notFoundHandler(c, w, r)
return
} else if err != nil {
oopsHandler(c, w, r, RespAUTO, "Corrupt metadata.")
return
}
if !Config.allowHotlink {
referer := r.Header.Get("Referer")
u, _ := url.Parse(referer)
p, _ := url.Parse(getSiteURL(r))
if referer != "" && !sameOrigin(u, p) {
http.Redirect(w, r, Config.sitePath+fileName, 303)
return
}
}
w.Header().Set("Content-Security-Policy", Config.fileContentSecurityPolicy)
w.Header().Set("Referrer-Policy", Config.fileReferrerPolicy)
_, reader, err := storageBackend.Get(fileName)
if err != nil {
oopsHandler(c, w, r, RespAUTO, err.Error())
}
w.Header().Set("Content-Type", metadata.Mimetype)
w.Header().Set("Content-Length", strconv.FormatInt(metadata.Size, 10))
w.Header().Set("Etag", metadata.Sha256sum)
w.Header().Set("Cache-Control", "max-age=0")
if r.Method != "HEAD" {
defer reader.Close()
if _, err = io.CopyN(w, reader, metadata.Size); err != nil {
oopsHandler(c, w, r, RespAUTO, err.Error())
}
}
}
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 = Config.sitePath + "/static/images/favicon.gif"
}
filePath := strings.TrimPrefix(path, Config.sitePath+"static/")
file, err := staticBox.Open(filePath)
if err != nil {
notFoundHandler(c, w, r)
return
}
w.Header().Set("Etag", timeStartedStr)
w.Header().Set("Cache-Control", "max-age=86400")
http.ServeContent(w, r, filePath, timeStarted, file)
return
}
}
func checkFile(filename string) (metadata backends.Metadata, err error) {
metadata, err = storageBackend.Head(filename)
if err != nil {
return
}
if expiry.IsTsExpired(metadata.Expiry) {
storageBackend.Delete(filename)
err = backends.NotFoundErr
return
}
return
}