Jeff Sharkey | 31c6e48 | 2011-11-18 17:09:01 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 The Android Open Source Project |
| 3 | * |
| 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 |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 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. |
| 15 | */ |
| 16 | |
| 17 | package com.android.server; |
| 18 | |
Robert Greenwalt | 2d34b4a | 2012-04-20 13:08:02 -0700 | [diff] [blame] | 19 | import android.util.Slog; |
Jeff Sharkey | ba2896e | 2011-11-30 18:13:54 -0800 | [diff] [blame] | 20 | import com.google.android.collect.Lists; |
| 21 | |
| 22 | import java.util.ArrayList; |
| 23 | |
Jeff Sharkey | 31c6e48 | 2011-11-18 17:09:01 -0800 | [diff] [blame] | 24 | /** |
| 25 | * Parsed event from native side of {@link NativeDaemonConnector}. |
| 26 | */ |
| 27 | public class NativeDaemonEvent { |
| 28 | |
| 29 | // TODO: keep class ranges in sync with ResponseCode.h |
| 30 | // TODO: swap client and server error ranges to roughly mirror HTTP spec |
| 31 | |
Robert Greenwalt | 470007f | 2012-02-07 11:36:55 -0800 | [diff] [blame] | 32 | private final int mCmdNumber; |
Jeff Sharkey | 31c6e48 | 2011-11-18 17:09:01 -0800 | [diff] [blame] | 33 | private final int mCode; |
| 34 | private final String mMessage; |
| 35 | private final String mRawEvent; |
Robert Greenwalt | 2d34b4a | 2012-04-20 13:08:02 -0700 | [diff] [blame] | 36 | private String[] mParsed; |
Jeff Sharkey | 31c6e48 | 2011-11-18 17:09:01 -0800 | [diff] [blame] | 37 | |
Robert Greenwalt | 470007f | 2012-02-07 11:36:55 -0800 | [diff] [blame] | 38 | private NativeDaemonEvent(int cmdNumber, int code, String message, String rawEvent) { |
| 39 | mCmdNumber = cmdNumber; |
Jeff Sharkey | 31c6e48 | 2011-11-18 17:09:01 -0800 | [diff] [blame] | 40 | mCode = code; |
| 41 | mMessage = message; |
| 42 | mRawEvent = rawEvent; |
Robert Greenwalt | 2d34b4a | 2012-04-20 13:08:02 -0700 | [diff] [blame] | 43 | mParsed = null; |
Jeff Sharkey | 31c6e48 | 2011-11-18 17:09:01 -0800 | [diff] [blame] | 44 | } |
| 45 | |
Robert Greenwalt | 470007f | 2012-02-07 11:36:55 -0800 | [diff] [blame] | 46 | public int getCmdNumber() { |
| 47 | return mCmdNumber; |
| 48 | } |
| 49 | |
Jeff Sharkey | 31c6e48 | 2011-11-18 17:09:01 -0800 | [diff] [blame] | 50 | public int getCode() { |
| 51 | return mCode; |
| 52 | } |
| 53 | |
| 54 | public String getMessage() { |
| 55 | return mMessage; |
| 56 | } |
| 57 | |
| 58 | @Deprecated |
| 59 | public String getRawEvent() { |
| 60 | return mRawEvent; |
| 61 | } |
| 62 | |
| 63 | @Override |
| 64 | public String toString() { |
| 65 | return mRawEvent; |
| 66 | } |
| 67 | |
| 68 | /** |
| 69 | * Test if event represents a partial response which is continued in |
| 70 | * additional subsequent events. |
| 71 | */ |
| 72 | public boolean isClassContinue() { |
| 73 | return mCode >= 100 && mCode < 200; |
| 74 | } |
| 75 | |
| 76 | /** |
| 77 | * Test if event represents a command success. |
| 78 | */ |
| 79 | public boolean isClassOk() { |
| 80 | return mCode >= 200 && mCode < 300; |
| 81 | } |
| 82 | |
| 83 | /** |
| 84 | * Test if event represents a remote native daemon error. |
| 85 | */ |
| 86 | public boolean isClassServerError() { |
| 87 | return mCode >= 400 && mCode < 500; |
| 88 | } |
| 89 | |
| 90 | /** |
| 91 | * Test if event represents a command syntax or argument error. |
| 92 | */ |
| 93 | public boolean isClassClientError() { |
| 94 | return mCode >= 500 && mCode < 600; |
| 95 | } |
| 96 | |
| 97 | /** |
| 98 | * Test if event represents an unsolicited event from native daemon. |
| 99 | */ |
| 100 | public boolean isClassUnsolicited() { |
Robert Greenwalt | 470007f | 2012-02-07 11:36:55 -0800 | [diff] [blame] | 101 | return isClassUnsolicited(mCode); |
| 102 | } |
| 103 | |
| 104 | private static boolean isClassUnsolicited(int code) { |
| 105 | return code >= 600 && code < 700; |
Jeff Sharkey | 31c6e48 | 2011-11-18 17:09:01 -0800 | [diff] [blame] | 106 | } |
| 107 | |
| 108 | /** |
Jeff Sharkey | ba2896e | 2011-11-30 18:13:54 -0800 | [diff] [blame] | 109 | * Verify this event matches the given code. |
| 110 | * |
| 111 | * @throws IllegalStateException if {@link #getCode()} doesn't match. |
| 112 | */ |
| 113 | public void checkCode(int code) { |
| 114 | if (mCode != code) { |
| 115 | throw new IllegalStateException("Expected " + code + " but was: " + this); |
| 116 | } |
| 117 | } |
| 118 | |
| 119 | /** |
Jeff Sharkey | 31c6e48 | 2011-11-18 17:09:01 -0800 | [diff] [blame] | 120 | * Parse the given raw event into {@link NativeDaemonEvent} instance. |
| 121 | * |
| 122 | * @throws IllegalArgumentException when line doesn't match format expected |
| 123 | * from native side. |
| 124 | */ |
| 125 | public static NativeDaemonEvent parseRawEvent(String rawEvent) { |
Robert Greenwalt | 470007f | 2012-02-07 11:36:55 -0800 | [diff] [blame] | 126 | final String[] parsed = rawEvent.split(" "); |
| 127 | if (parsed.length < 2) { |
| 128 | throw new IllegalArgumentException("Insufficient arguments"); |
Jeff Sharkey | 31c6e48 | 2011-11-18 17:09:01 -0800 | [diff] [blame] | 129 | } |
| 130 | |
Robert Greenwalt | 470007f | 2012-02-07 11:36:55 -0800 | [diff] [blame] | 131 | int skiplength = 0; |
| 132 | |
Jeff Sharkey | 31c6e48 | 2011-11-18 17:09:01 -0800 | [diff] [blame] | 133 | final int code; |
| 134 | try { |
Robert Greenwalt | 470007f | 2012-02-07 11:36:55 -0800 | [diff] [blame] | 135 | code = Integer.parseInt(parsed[0]); |
| 136 | skiplength = parsed[0].length() + 1; |
Jeff Sharkey | 31c6e48 | 2011-11-18 17:09:01 -0800 | [diff] [blame] | 137 | } catch (NumberFormatException e) { |
| 138 | throw new IllegalArgumentException("problem parsing code", e); |
| 139 | } |
| 140 | |
Robert Greenwalt | 470007f | 2012-02-07 11:36:55 -0800 | [diff] [blame] | 141 | int cmdNumber = -1; |
| 142 | if (isClassUnsolicited(code) == false) { |
| 143 | if (parsed.length < 3) { |
| 144 | throw new IllegalArgumentException("Insufficient arguemnts"); |
| 145 | } |
| 146 | try { |
| 147 | cmdNumber = Integer.parseInt(parsed[1]); |
| 148 | skiplength += parsed[1].length() + 1; |
| 149 | } catch (NumberFormatException e) { |
| 150 | throw new IllegalArgumentException("problem parsing cmdNumber", e); |
| 151 | } |
| 152 | } |
| 153 | |
| 154 | final String message = rawEvent.substring(skiplength); |
| 155 | |
| 156 | return new NativeDaemonEvent(cmdNumber, code, message, rawEvent); |
Jeff Sharkey | 31c6e48 | 2011-11-18 17:09:01 -0800 | [diff] [blame] | 157 | } |
Jeff Sharkey | ba2896e | 2011-11-30 18:13:54 -0800 | [diff] [blame] | 158 | |
| 159 | /** |
| 160 | * Filter the given {@link NativeDaemonEvent} list, returning |
| 161 | * {@link #getMessage()} for any events matching the requested code. |
| 162 | */ |
| 163 | public static String[] filterMessageList(NativeDaemonEvent[] events, int matchCode) { |
| 164 | final ArrayList<String> result = Lists.newArrayList(); |
| 165 | for (NativeDaemonEvent event : events) { |
| 166 | if (event.getCode() == matchCode) { |
| 167 | result.add(event.getMessage()); |
| 168 | } |
| 169 | } |
| 170 | return result.toArray(new String[result.size()]); |
| 171 | } |
Robert Greenwalt | 2d34b4a | 2012-04-20 13:08:02 -0700 | [diff] [blame] | 172 | |
| 173 | /** |
| 174 | * Find the Nth field of the event. |
| 175 | * |
| 176 | * This ignores and code or cmdNum, the first return value is given for N=0. |
| 177 | * Also understands "\"quoted\" multiword responses" and tries them as a single field |
| 178 | */ |
| 179 | public String getField(int n) { |
| 180 | if (mParsed == null) { |
| 181 | mParsed = unescapeArgs(mRawEvent); |
| 182 | } |
| 183 | n += 2; // skip code and command# |
| 184 | if (n > mParsed.length) return null; |
| 185 | return mParsed[n]; |
| 186 | } |
| 187 | |
| 188 | public static String[] unescapeArgs(String rawEvent) { |
| 189 | final boolean DEBUG_ROUTINE = false; |
| 190 | final String LOGTAG = "unescapeArgs"; |
| 191 | final ArrayList<String> parsed = new ArrayList<String>(); |
| 192 | final int length = rawEvent.length(); |
| 193 | int current = 0; |
| 194 | int wordEnd = -1; |
| 195 | boolean quoted = false; |
| 196 | |
| 197 | if (DEBUG_ROUTINE) Slog.e(LOGTAG, "parsing '" + rawEvent + "'"); |
| 198 | if (rawEvent.charAt(current) == '\"') { |
| 199 | quoted = true; |
| 200 | current++; |
| 201 | } |
| 202 | while (current < length) { |
| 203 | // find the end of the word |
| 204 | if (quoted) { |
| 205 | wordEnd = current; |
| 206 | while ((wordEnd = rawEvent.indexOf('\"', wordEnd)) != -1) { |
| 207 | if (rawEvent.charAt(wordEnd - 1) != '\\') { |
| 208 | break; |
| 209 | } else { |
| 210 | wordEnd++; // skip this escaped quote and keep looking |
| 211 | } |
| 212 | } |
| 213 | } else { |
| 214 | wordEnd = rawEvent.indexOf(' ', current); |
| 215 | } |
| 216 | // if we didn't find the end-o-word token, take the rest of the string |
| 217 | if (wordEnd == -1) wordEnd = length; |
| 218 | String word = rawEvent.substring(current, wordEnd); |
| 219 | current += word.length(); |
| 220 | if (!quoted) { |
| 221 | word = word.trim(); |
| 222 | } else { |
| 223 | current++; // skip the trailing quote |
| 224 | } |
| 225 | // unescape stuff within the word |
| 226 | word.replace("\\\\", "\\"); |
| 227 | word.replace("\\\"", "\""); |
| 228 | |
| 229 | if (DEBUG_ROUTINE) Slog.e(LOGTAG, "found '" + word + "'"); |
| 230 | parsed.add(word); |
| 231 | |
| 232 | // find the beginning of the next word - either of these options |
| 233 | int nextSpace = rawEvent.indexOf(' ', current); |
| 234 | int nextQuote = rawEvent.indexOf(" \"", current); |
| 235 | if (DEBUG_ROUTINE) { |
| 236 | Slog.e(LOGTAG, "nextSpace=" + nextSpace + ", nextQuote=" + nextQuote); |
| 237 | } |
| 238 | if (nextQuote > -1 && nextQuote <= nextSpace) { |
| 239 | quoted = true; |
| 240 | current = nextQuote + 2; |
| 241 | } else { |
| 242 | quoted = false; |
| 243 | if (nextSpace > -1) { |
| 244 | current = nextSpace + 1; |
| 245 | } |
| 246 | } // else we just start the next word after the current and read til the end |
| 247 | if (DEBUG_ROUTINE) { |
| 248 | Slog.e(LOGTAG, "next loop - current=" + current + |
| 249 | ", length=" + length + ", quoted=" + quoted); |
| 250 | } |
| 251 | } |
| 252 | return parsed.toArray(new String[parsed.size()]); |
| 253 | } |
Jeff Sharkey | 31c6e48 | 2011-11-18 17:09:01 -0800 | [diff] [blame] | 254 | } |