10234: Pass through gitolite env vars so old env-var-configured sites continue working.

[arvados.git] / services / keep-web / handler.go

diff --git a/services/keep-web/handler.go b/services/keep-web/handler.go
index 6f5f66ae0ef1bf57979f04189fe4d110818b1bd6..11d0d96b298de5e4369474418f9f78583634510e 100644 (file)
--- a/services/keep-web/handler.go
+++ b/services/keep-web/handler.go
@@ -1,7 +1,6 @@
 package main
 
 import (
-       "flag"
        "fmt"
        "html"
        "io"
@@ -12,6 +11,7 @@ import (
        "regexp"
        "strconv"
        "strings"
+       "sync"
 
        "git.curoverse.com/arvados.git/sdk/go/arvadosclient"
        "git.curoverse.com/arvados.git/sdk/go/auth"
@@ -19,23 +19,14 @@ import (
        "git.curoverse.com/arvados.git/sdk/go/keepclient"
 )
 
-type handler struct{}
-
-var (
-       clientPool         = arvadosclient.MakeClientPool()
-       trustAllContent    = false
-       attachmentOnlyHost = ""
-)
-
-func init() {
-       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!")
+type handler struct {
+       Config     *Config
+       clientPool *arvadosclient.ClientPool
+       setupOnce  sync.Once
 }
 
-// return a UUID or PDH if s begins with a UUID or URL-encoded PDH;
-// otherwise return "".
+// parseCollectionIDFromDNSName returns a UUID or PDH if s begins with
+// a UUID or URL-encoded PDH; otherwise "".
 func parseCollectionIDFromDNSName(s string) string {
        // Strip domain.
        if i := strings.IndexRune(s, '.'); i >= 0 {
@@ -58,8 +49,9 @@ func parseCollectionIDFromDNSName(s string) string {
 
 var urlPDHDecoder = strings.NewReplacer(" ", "+", "-", "+")
 
-// return a UUID or PDH if s is a UUID or a PDH (even if it is a PDH
-// with "+" replaced by " " or "-"); otherwise return "".
+// parseCollectionIDFromURL returns a UUID or PDH if s is a UUID or a
+// PDH (even if it is a PDH with "+" replaced by " " or "-");
+// otherwise "".
 func parseCollectionIDFromURL(s string) string {
        if arvadosclient.UUIDMatch(s) {
                return s
@@ -70,7 +62,14 @@ func parseCollectionIDFromURL(s string) string {
        return ""
 }
 
+func (h *handler) setup() {
+       h.clientPool = arvadosclient.MakeClientPool()
+}
+
+// ServeHTTP implements http.Handler.
 func (h *handler) ServeHTTP(wOrig http.ResponseWriter, r *http.Request) {
+       h.setupOnce.Do(h.setup)
+
        var statusCode = 0
        var statusText string
 
@@ -109,12 +108,12 @@ func (h *handler) ServeHTTP(wOrig http.ResponseWriter, r *http.Request) {
                w.Header().Set("Access-Control-Allow-Origin", "*")
        }
 
-       arv := clientPool.Get()
+       arv := h.clientPool.Get()
        if arv == nil {
-               statusCode, statusText = http.StatusInternalServerError, "Pool failed: "+clientPool.Err().Error()
+               statusCode, statusText = http.StatusInternalServerError, "Pool failed: "+h.clientPool.Err().Error()
                return
        }
-       defer clientPool.Put(arv)
+       defer h.clientPool.Put(arv)
 
        pathParts := strings.Split(r.URL.Path[1:], "/")
 
@@ -124,9 +123,9 @@ func (h *handler) ServeHTTP(wOrig http.ResponseWriter, r *http.Request) {
        var reqTokens []string
        var pathToken bool
        var attachment bool
-       credentialsOK := trustAllContent
+       credentialsOK := h.Config.TrustAllContent
 
-       if r.Host != "" && r.Host == attachmentOnlyHost {
+       if r.Host != "" && r.Host == h.Config.AttachmentOnlyHost {
                credentialsOK = true
                attachment = true
        } else if r.FormValue("disposition") == "attachment" {
@@ -151,7 +150,7 @@ func (h *handler) ServeHTTP(wOrig http.ResponseWriter, r *http.Request) {
                } else {
                        // /collections/ID/PATH...
                        targetID = pathParts[1]
-                       tokens = anonymousTokens
+                       tokens = h.Config.AnonymousTokens
                        targetPath = pathParts[2:]
                }
        } else {
@@ -186,7 +185,7 @@ func (h *handler) ServeHTTP(wOrig http.ResponseWriter, r *http.Request) {
                        // It is not safe to copy the provided token
                        // into a cookie unless the current vhost
                        // (origin) serves only a single collection or
-                       // we are in trustAllContent mode.
+                       // we are in TrustAllContent mode.
                        statusCode = http.StatusBadRequest
                        return
                }
@@ -246,7 +245,7 @@ func (h *handler) ServeHTTP(wOrig http.ResponseWriter, r *http.Request) {
                if credentialsOK {
                        reqTokens = auth.NewCredentialsFromHTTPRequest(r).Tokens
                }
-               tokens = append(reqTokens, anonymousTokens...)
+               tokens = append(reqTokens, h.Config.AnonymousTokens...)
        }
 
        if len(targetPath) > 0 && targetPath[0] == "_" {