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d4efd44fb0
git-svn-id: https://zxing.googlecode.com/svn/trunk@1202 59b500cc-1b3d-0410-9834-0bbf25fbcc57
106 lines
2.8 KiB
C#
Executable file
106 lines
2.8 KiB
C#
Executable file
/*
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* Copyright 2007 ZXing authors
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*
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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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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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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using System;
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using Result = com.google.zxing.Result;
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namespace com.google.zxing.client.result
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{
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/// <summary> Tries to parse results that are a URI of some kind.
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///
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/// </summary>
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/// <author> Sean Owen
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/// </author>
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/// <author>www.Redivivus.in (suraj.supekar@redivivus.in) - Ported from ZXING Java Source
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/// </author>
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sealed class URIResultParser:ResultParser
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{
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private URIResultParser()
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{
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}
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public static URIParsedResult parse(Result result)
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{
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System.String rawText = result.Text;
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// We specifically handle the odd "URL" scheme here for simplicity
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if (rawText != null && rawText.StartsWith("URL:"))
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{
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rawText = rawText.Substring(4);
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}
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if (!isBasicallyValidURI(rawText))
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{
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return null;
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}
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return new URIParsedResult(rawText, null);
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}
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/// <summary> Determines whether a string is not obviously not a URI. This implements crude checks; this class does not
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/// intend to strictly check URIs as its only function is to represent what is in a barcode, but, it does
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/// need to know when a string is obviously not a URI.
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/// </summary>
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internal static bool isBasicallyValidURI(System.String uri)
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{
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if (uri == null || uri.IndexOf(' ') >= 0 || uri.IndexOf('\n') >= 0)
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{
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return false;
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}
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// Look for period in a domain but followed by at least a two-char TLD
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// Forget strings that don't have a valid-looking protocol
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int period = uri.IndexOf('.');
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if (period >= uri.Length - 2)
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{
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return false;
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}
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int colon = uri.IndexOf(':');
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if (period < 0 && colon < 0)
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{
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return false;
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}
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if (colon >= 0)
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{
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if (period < 0 || period > colon)
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{
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// colon ends the protocol
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for (int i = 0; i < colon; i++)
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{
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char c = uri[i];
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if ((c < 'a' || c > 'z') && (c < 'A' || c > 'Z'))
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{
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return false;
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}
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}
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}
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else
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{
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// colon starts the port; crudely look for at least two numbers
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if (colon >= uri.Length - 2)
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{
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return false;
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}
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for (int i = colon + 1; i < colon + 3; i++)
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{
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char c = uri[i];
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if (c < '0' || c > '9')
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{
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return false;
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}
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}
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}
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}
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return true;
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}
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}
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} |