+ + diff --git a/server/go/camlistored/ui/permanode.js b/server/go/camlistored/ui/permanode.js new file mode 100644 index 000000000..55aa1c217 --- /dev/null +++ b/server/go/camlistored/ui/permanode.js @@ -0,0 +1,38 @@ +/* +Copyright 2011 Google Inc. + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + +// Returns the first value from the query string corresponding to |key|. +// Returns null if the key isn't present. +function getQueryParam(key) { + var params = document.location.search.substring(1).split('&'); + for (var i = 0; i < params.length; ++i) { + var parts = params[i].split('='); + if (parts.length == 2 && decodeURIComponent(parts[0]) == key) + return decodeURIComponent(parts[1]); + } + return null; +} + +// Returns true if the passed-in string might be a blobref. +function isPlausibleBlobRef(blobRef) { + return /^\w+-[a-f0-9]+$/.test(blobRef); +} + +// Gets the |p| query parameter, assuming that it looks like a blobref. +function getPermanodeParam() { + var blobRef = getQueryParam('p'); + return (blobRef && isPlausibleBlobRef(blobRef)) ? blobRef : null; +}