2 * Copyright 2007 ZXing authors
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 package com.google.zxing.client.result;
19 import com.google.zxing.Result;
22 * Tries to parse results that are a URI of some kind.
26 final class URIResultParser extends ResultParser {
28 private URIResultParser() {
31 public static URIParsedResult parse(Result result) {
32 String rawText = result.getText();
33 // We specifically handle the odd "URL" scheme here for simplicity
34 if (rawText != null && rawText.startsWith("URL:")) {
35 rawText = rawText.substring(4);
37 if (!isBasicallyValidURI(rawText)) {
40 return new URIParsedResult(rawText, null);
44 * Determines whether a string is not obviously not a URI. This implements crude checks; this class does not
45 * intend to strictly check URIs as its only function is to represent what is in a barcode, but, it does
46 * need to know when a string is obviously not a URI.
48 static boolean isBasicallyValidURI(String uri) {
49 if (uri == null || uri.indexOf(' ') >= 0 || uri.indexOf('\n') >= 0) {
52 // Look for period in a domain but followed by at least a two-char TLD
53 // Forget strings that don't have a valid-looking protocol
54 int period = uri.indexOf('.');
55 if (period >= uri.length() - 2) {
58 int colon = uri.indexOf(':');
59 if (period < 0 && colon < 0) {
63 if (period < 0 || period > colon) {
64 // colon ends the protocol
65 for (int i = 0; i < colon; i++) {
66 char c = uri.charAt(i);
67 if ((c < 'a' || c > 'z') && (c < 'A' || c > 'Z')) {
72 // colon starts the port; crudely look for at least two numbers
73 if (colon >= uri.length() - 2) {
76 for (int i = colon + 1; i < colon + 3; i++) {
77 char c = uri.charAt(i);
78 if (c < '0' || c > '9') {