Serve querystring-style secret blobs

e.g. %+WP4++A4PSy5riB4SfVhEQknfFueFhZOYBPiIUbW8PE=.sha256

1 files changed, 28 insertions, 20 deletions

diff --git a/lib/serve.js b/lib/serve.js
index c858a1b..56b981b 100644
--- a/lib/serve.js
+++ b/lib/serve.js
@@ -1098,24 +1098,28 @@ Serve.prototype.highlight = function (dirs) {
 
 Serve.prototype.blob = function (id, path) {
   var self = this
-  var etag = id + (path || '')
+  var unbox = typeof this.query.unbox === 'string' && this.query.unbox.replace(/\s/g, '+')
+  var etag = id + (path || '') + (unbox || '')
   if (self.req.headers['if-none-match'] === etag) return self.respond(304)
   var key
   if (path) {
-    path = decodeURIComponent(path)
+    try { path = decodeURIComponent(path) } catch(e) {}
     if (path[0] === '#') {
-      try {
-        key = new Buffer(path.substr(1), 'base64')
-      } catch(err) {
-        return self.respond(400, err.message)
-      }
-      if (key.length !== 32) {
-        return self.respond(400, 'Bad blob key')
-      }
+      unbox = path.substr(1)
     } else {
       return self.respond(400, 'Bad blob request')
     }
   }
+  if (unbox) {
+    try {
+      key = new Buffer(unbox, 'base64')
+    } catch(err) {
+      return self.respond(400, err.message)
+    }
+    if (key.length !== 32) {
+      return self.respond(400, 'Bad blob key')
+    }
+  }
   self.app.wantSizeBlob(id, function (err, size) {
     if (err) {
       if (/^invalid/.test(err.message)) return self.respond(400, err.message)
@@ -1148,23 +1152,27 @@ Serve.prototype.image = function (path) {
   var id, key
   var m = urlIdRegex.exec(path)
   if (m && m[2] === '&') id = m[1], path = m[3]
-  var etag = 'image-' + id + (path || '')
+  var unbox = typeof this.query.unbox === 'string' && this.query.unbox.replace(/\s/g, '+')
+  var etag = 'image-' + id + (path || '') + (unbox || '')
   if (self.req.headers['if-none-match'] === etag) return self.respond(304)
   if (path) {
-    path = decodeURIComponent(path)
+    try { path = decodeURIComponent(path) } catch(e) {}
     if (path[0] === '#') {
-      try {
-        key = new Buffer(path.substr(1), 'base64')
-      } catch(err) {
-        return self.respond(400, err.message)
-      }
-      if (key.length !== 32) {
-        return self.respond(400, 'Bad blob key')
-      }
+      unbox = path.substr(1)
     } else {
       return self.respond(400, 'Bad blob request')
     }
   }
+  if (unbox) {
+    try {
+      key = new Buffer(unbox, 'base64')
+    } catch(err) {
+      return self.respond(400, err.message)
+    }
+    if (key.length !== 32) {
+      return self.respond(400, 'Bad blob key')
+    }
+  }
   self.app.wantSizeBlob(id, function (err, size) {
     if (err) {
       if (/^invalid/.test(err.message)) return self.respond(400, err.message)