X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/e3a1bf022cbc081cf7c7ebb441dc1ab1df200f98..8b3478bda6764b3f30aef69ec0a93729495296c0:/services/keep-web/handler.go

diff --git a/services/keep-web/handler.go b/services/keep-web/handler.go
index 2704263e71..847329f331 100644
--- a/services/keep-web/handler.go
+++ b/services/keep-web/handler.go
@@ -9,8 +9,9 @@ import (
 	"net/http"
 	"net/url"
 	"os"
+	"regexp"
+	"strconv"
 	"strings"
-	"time"
 
 	"git.curoverse.com/arvados.git/sdk/go/arvadosclient"
 	"git.curoverse.com/arvados.git/sdk/go/auth"
@@ -23,15 +24,14 @@ type handler struct{}
 var (
 	clientPool         = arvadosclient.MakeClientPool()
 	trustAllContent    = false
-	anonymousTokens    []string
 	attachmentOnlyHost = ""
 )
 
 func init() {
-	flag.BoolVar(&trustAllContent, "trust-all-content", false,
-		"Serve non-public content from a single origin. Dangerous: read docs before using!")
 	flag.StringVar(&attachmentOnlyHost, "attachment-only-host", "",
 		"Accept credentials, and add \"Content-Disposition: attachment\" response headers, for requests at this hostname:port. Prohibiting inline display makes it possible to serve untrusted and non-public content from a single origin, i.e., without wildcard DNS or SSL.")
+	flag.BoolVar(&trustAllContent, "trust-all-content", false,
+		"Serve non-public content from a single origin. Dangerous: read docs before using!")
 }
 
 // return a UUID or PDH if s begins with a UUID or URL-encoded PDH;
@@ -181,10 +181,19 @@ func (h *handler) ServeHTTP(wOrig http.ResponseWriter, r *http.Request) {
 			Name:     "arvados_api_token",
 			Value:    auth.EncodeTokenCookie([]byte(t)),
 			Path:     "/",
-			Expires:  time.Now().AddDate(10, 0, 0),
 			HttpOnly: true,
 		})
-		redir := (&url.URL{Host: r.Host, Path: r.URL.Path}).String()
+
+		// Propagate query parameters (except api_token) from
+		// the original request.
+		redirQuery := r.URL.Query()
+		redirQuery.Del("api_token")
+
+		redir := (&url.URL{
+			Host:     r.Host,
+			Path:     r.URL.Path,
+			RawQuery: redirQuery.Encode(),
+		}).String()
 
 		w.Header().Add("Location", redir)
 		statusCode, statusText = http.StatusSeeOther, redir
@@ -295,8 +304,10 @@ func (h *handler) ServeHTTP(wOrig http.ResponseWriter, r *http.Request) {
 	}
 	defer rdr.Close()
 
-	// One or both of these can be -1 if not found:
 	basenamePos := strings.LastIndex(filename, "/")
+	if basenamePos < 0 {
+		basenamePos = 0
+	}
 	extPos := strings.LastIndex(filename, ".")
 	if extPos > basenamePos {
 		// Now extPos is safely >= 0.
@@ -307,13 +318,53 @@ func (h *handler) ServeHTTP(wOrig http.ResponseWriter, r *http.Request) {
 	if rdr, ok := rdr.(keepclient.ReadCloserWithLen); ok {
 		w.Header().Set("Content-Length", fmt.Sprintf("%d", rdr.Len()))
 	}
-	if attachment {
-		w.Header().Set("Content-Disposition", "attachment")
-	}
 
-	w.WriteHeader(http.StatusOK)
-	_, err = io.Copy(w, rdr)
+	applyContentDispositionHdr(w, r, filename[basenamePos:], attachment)
+	rangeRdr, statusCode := applyRangeHdr(w, r, rdr)
+
+	w.WriteHeader(statusCode)
+	_, err = io.Copy(w, rangeRdr)
 	if err != nil {
 		statusCode, statusText = http.StatusBadGateway, err.Error()
 	}
 }
+
+var rangeRe = regexp.MustCompile(`^bytes=0-([0-9]*)$`)
+
+func applyRangeHdr(w http.ResponseWriter, r *http.Request, rdr keepclient.ReadCloserWithLen) (io.Reader, int) {
+	w.Header().Set("Accept-Ranges", "bytes")
+	hdr := r.Header.Get("Range")
+	fields := rangeRe.FindStringSubmatch(hdr)
+	if fields == nil {
+		return rdr, http.StatusOK
+	}
+	rangeEnd, err := strconv.ParseInt(fields[1], 10, 64)
+	if err != nil {
+		// Empty or too big for int64 == send entire content
+		return rdr, http.StatusOK
+	}
+	if uint64(rangeEnd) >= rdr.Len() {
+		return rdr, http.StatusOK
+	}
+	w.Header().Set("Content-Length", fmt.Sprintf("%d", rangeEnd+1))
+	w.Header().Set("Content-Range", fmt.Sprintf("bytes %d-%d/%d", 0, rangeEnd, rdr.Len()))
+	return &io.LimitedReader{R: rdr, N: rangeEnd + 1}, http.StatusPartialContent
+}
+
+func applyContentDispositionHdr(w http.ResponseWriter, r *http.Request, filename string, isAttachment bool) {
+	disposition := "inline"
+	if isAttachment {
+		disposition = "attachment"
+	}
+	if strings.ContainsRune(r.RequestURI, '?') {
+		// Help the UA realize that the filename is just
+		// "filename.txt", not
+		// "filename.txt?disposition=attachment".
+		//
+		// TODO(TC): Follow advice at RFC 6266 appendix D
+		disposition += "; filename=" + strconv.QuoteToASCII(filename)
+	}
+	if disposition != "inline" {
+		w.Header().Set("Content-Disposition", disposition)
+	}
+}