| /* |
| * Copyright 2020 The Android Open Source Project |
| * |
| * 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. |
| */ |
| |
| package com.android.net.module.util; |
| |
| import android.text.TextUtils; |
| |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Locale; |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| |
| /** |
| * Collection of network common utilities. |
| * |
| * @hide |
| */ |
| public final class ProxyUtils { |
| |
| public static final int PROXY_VALID = 0; |
| public static final int PROXY_HOSTNAME_EMPTY = 1; |
| public static final int PROXY_HOSTNAME_INVALID = 2; |
| public static final int PROXY_PORT_EMPTY = 3; |
| public static final int PROXY_PORT_INVALID = 4; |
| public static final int PROXY_EXCLLIST_INVALID = 5; |
| |
| // Hostname / IP REGEX validation |
| // Matches blank input, ips, and domain names |
| private static final String NAME_IP_REGEX = |
| "[a-zA-Z0-9]+(\\-[a-zA-Z0-9]+)*(\\.[a-zA-Z0-9]+(\\-[a-zA-Z0-9]+)*)*"; |
| private static final Pattern HOSTNAME_PATTERN; |
| private static final String HOSTNAME_REGEXP = "^$|^" + NAME_IP_REGEX + "$"; |
| private static final Pattern EXCLLIST_PATTERN; |
| private static final String EXCL_REGEX = |
| "[a-zA-Z0-9*]+(\\-[a-zA-Z0-9*]+)*(\\.[a-zA-Z0-9*]+(\\-[a-zA-Z0-9*]+)*)*"; |
| private static final String EXCLLIST_REGEXP = "^$|^" + EXCL_REGEX + "(," + EXCL_REGEX + ")*$"; |
| static { |
| HOSTNAME_PATTERN = Pattern.compile(HOSTNAME_REGEXP); |
| EXCLLIST_PATTERN = Pattern.compile(EXCLLIST_REGEXP); |
| } |
| |
| /** Converts exclusion list from String to List. */ |
| public static List<String> exclusionStringAsList(String exclusionList) { |
| if (exclusionList == null) { |
| return Collections.emptyList(); |
| } |
| return Arrays.asList(exclusionList.toLowerCase(Locale.ROOT).split(",")); |
| } |
| |
| /** Converts exclusion list from List to string */ |
| public static String exclusionListAsString(String[] exclusionList) { |
| if (exclusionList == null) { |
| return ""; |
| } |
| return TextUtils.join(",", exclusionList); |
| } |
| |
| /** |
| * Validate syntax of hostname, port and exclusion list entries |
| */ |
| public static int validate(String hostname, String port, String exclList) { |
| Matcher match = HOSTNAME_PATTERN.matcher(hostname); |
| Matcher listMatch = EXCLLIST_PATTERN.matcher(exclList); |
| |
| if (!match.matches()) return PROXY_HOSTNAME_INVALID; |
| |
| if (!listMatch.matches()) return PROXY_EXCLLIST_INVALID; |
| |
| if (hostname.length() > 0 && port.length() == 0) return PROXY_PORT_EMPTY; |
| |
| if (port.length() > 0) { |
| if (hostname.length() == 0) return PROXY_HOSTNAME_EMPTY; |
| int portVal = -1; |
| try { |
| portVal = Integer.parseInt(port); |
| } catch (NumberFormatException ex) { |
| return PROXY_PORT_INVALID; |
| } |
| if (portVal <= 0 || portVal > 0xFFFF) return PROXY_PORT_INVALID; |
| } |
| return PROXY_VALID; |
| } |
| } |