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