Remove apache dependency from android-common.

This static library was relying on HttpDateTime via AndroidHttpClient.
(and is the only user of this API in our tree). Regrettably, the most
reasonable way forward seems to be copy that class into frameworks/ex.

Using reflection is possible too, but it's riskier since we have to
ensure this class exists unmodified all the way back to froyo.

See API council request b/2553589 for why this was in AndroidHttpClient
in the first place.

Also, this change sets LOCAL_SDK_VERSION := 8 for tests to match the
library version.

bug: 18027885

Change-Id: I9c473f60f0314758120e0d6c6f9b56e4d77ba658

3 files changed, 227 insertions, 3 deletions

diff --git a/common/java/com/android/common/LegacyHttpDateTime.java b/common/java/com/android/common/LegacyHttpDateTime.java
new file mode 100644
index 0000000..9b902d6
--- /dev/null
+++ b/common/java/com/android/common/LegacyHttpDateTime.java
@@ -0,0 +1,225 @@
+/*
+ * Copyright (C) 2007 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.common;
+
+import android.text.format.Time;
+
+import java.util.Calendar;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/**
+ * Helper for parsing an HTTP date.
+ */
+final class LegacyHttpDateTime {
+
+    /*
+     * Regular expression for parsing HTTP-date.
+     *
+     * Wdy, DD Mon YYYY HH:MM:SS GMT
+     * RFC 822, updated by RFC 1123
+     *
+     * Weekday, DD-Mon-YY HH:MM:SS GMT
+     * RFC 850, obsoleted by RFC 1036
+     *
+     * Wdy Mon DD HH:MM:SS YYYY
+     * ANSI C's asctime() format
+     *
+     * with following variations
+     *
+     * Wdy, DD-Mon-YYYY HH:MM:SS GMT
+     * Wdy, (SP)D Mon YYYY HH:MM:SS GMT
+     * Wdy,DD Mon YYYY HH:MM:SS GMT
+     * Wdy, DD-Mon-YY HH:MM:SS GMT
+     * Wdy, DD Mon YYYY HH:MM:SS -HHMM
+     * Wdy, DD Mon YYYY HH:MM:SS
+     * Wdy Mon (SP)D HH:MM:SS YYYY
+     * Wdy Mon DD HH:MM:SS YYYY GMT
+     * 
+     * HH can be H if the first digit is zero.
+     * 
+     * Mon can be the full name of the month.
+     */
+    private static final String HTTP_DATE_RFC_REGEXP =
+            "([0-9]{1,2})[- ]([A-Za-z]{3,9})[- ]([0-9]{2,4})[ ]"
+            + "([0-9]{1,2}:[0-9][0-9]:[0-9][0-9])";
+
+    private static final String HTTP_DATE_ANSIC_REGEXP =
+            "[ ]([A-Za-z]{3,9})[ ]+([0-9]{1,2})[ ]"
+            + "([0-9]{1,2}:[0-9][0-9]:[0-9][0-9])[ ]([0-9]{2,4})";
+
+    /**
+     * The compiled version of the HTTP-date regular expressions.
+     */
+    private static final Pattern HTTP_DATE_RFC_PATTERN =
+            Pattern.compile(HTTP_DATE_RFC_REGEXP);
+    private static final Pattern HTTP_DATE_ANSIC_PATTERN =
+            Pattern.compile(HTTP_DATE_ANSIC_REGEXP);
+
+    private static class TimeOfDay {
+        TimeOfDay(int h, int m, int s) {
+            this.hour = h;
+            this.minute = m;
+            this.second = s;
+        }
+        
+        int hour;
+        int minute;
+        int second;
+    }
+
+    public static long parse(String timeString)
+            throws IllegalArgumentException {
+
+        int date = 1;
+        int month = Calendar.JANUARY;
+        int year = 1970;
+        TimeOfDay timeOfDay;
+
+        Matcher rfcMatcher = HTTP_DATE_RFC_PATTERN.matcher(timeString);
+        if (rfcMatcher.find()) {
+            date = getDate(rfcMatcher.group(1));
+            month = getMonth(rfcMatcher.group(2));
+            year = getYear(rfcMatcher.group(3));
+            timeOfDay = getTime(rfcMatcher.group(4));
+        } else {
+            Matcher ansicMatcher = HTTP_DATE_ANSIC_PATTERN.matcher(timeString);
+            if (ansicMatcher.find()) {
+                month = getMonth(ansicMatcher.group(1));
+                date = getDate(ansicMatcher.group(2));
+                timeOfDay = getTime(ansicMatcher.group(3));
+                year = getYear(ansicMatcher.group(4));
+            } else {
+                throw new IllegalArgumentException();
+            }
+        }
+
+        // FIXME: Y2038 BUG!
+        if (year >= 2038) {
+            year = 2038;
+            month = Calendar.JANUARY;
+            date = 1;
+        }
+
+        Time time = new Time(Time.TIMEZONE_UTC);
+        time.set(timeOfDay.second, timeOfDay.minute, timeOfDay.hour, date,
+                month, year);
+        return time.toMillis(false /* use isDst */);
+    }
+
+    private static int getDate(String dateString) {
+        if (dateString.length() == 2) {
+            return (dateString.charAt(0) - '0') * 10
+                    + (dateString.charAt(1) - '0');
+        } else {
+            return (dateString.charAt(0) - '0');
+        }
+    }
+
+    /*
+     * jan = 9 + 0 + 13 = 22
+     * feb = 5 + 4 + 1 = 10
+     * mar = 12 + 0 + 17 = 29
+     * apr = 0 + 15 + 17 = 32
+     * may = 12 + 0 + 24 = 36
+     * jun = 9 + 20 + 13 = 42
+     * jul = 9 + 20 + 11 = 40
+     * aug = 0 + 20 + 6 = 26
+     * sep = 18 + 4 + 15 = 37
+     * oct = 14 + 2 + 19 = 35
+     * nov = 13 + 14 + 21 = 48
+     * dec = 3 + 4 + 2 = 9
+     */
+    private static int getMonth(String monthString) {
+        int hash = Character.toLowerCase(monthString.charAt(0)) +
+                Character.toLowerCase(monthString.charAt(1)) +
+                Character.toLowerCase(monthString.charAt(2)) - 3 * 'a';
+        switch (hash) {
+            case 22:
+                return Calendar.JANUARY;
+            case 10:
+                return Calendar.FEBRUARY;
+            case 29:
+                return Calendar.MARCH;
+            case 32:
+                return Calendar.APRIL;
+            case 36:
+                return Calendar.MAY;
+            case 42:
+                return Calendar.JUNE;
+            case 40:
+                return Calendar.JULY;
+            case 26:
+                return Calendar.AUGUST;
+            case 37:
+                return Calendar.SEPTEMBER;
+            case 35:
+                return Calendar.OCTOBER;
+            case 48:
+                return Calendar.NOVEMBER;
+            case 9:
+                return Calendar.DECEMBER;
+            default:
+                throw new IllegalArgumentException();
+        }
+    }
+
+    private static int getYear(String yearString) {
+        if (yearString.length() == 2) {
+            int year = (yearString.charAt(0) - '0') * 10
+                    + (yearString.charAt(1) - '0');
+            if (year >= 70) {
+                return year + 1900;
+            } else {
+                return year + 2000;
+            }
+        } else if (yearString.length() == 3) {
+            // According to RFC 2822, three digit years should be added to 1900.
+            int year = (yearString.charAt(0) - '0') * 100
+                    + (yearString.charAt(1) - '0') * 10
+                    + (yearString.charAt(2) - '0');
+            return year + 1900;
+        } else if (yearString.length() == 4) {
+             return (yearString.charAt(0) - '0') * 1000
+                    + (yearString.charAt(1) - '0') * 100
+                    + (yearString.charAt(2) - '0') * 10
+                    + (yearString.charAt(3) - '0');
+        } else {
+             return 1970;
+        }
+    }
+
+    private static TimeOfDay getTime(String timeString) {
+        // HH might be H
+        int i = 0;
+        int hour = timeString.charAt(i++) - '0';
+        if (timeString.charAt(i) != ':')
+            hour = hour * 10 + (timeString.charAt(i++) - '0');
+        // Skip ':'
+        i++;
+        
+        int minute = (timeString.charAt(i++) - '0') * 10
+                    + (timeString.charAt(i++) - '0');
+        // Skip ':'
+        i++;
+        
+        int second = (timeString.charAt(i++) - '0') * 10
+                  + (timeString.charAt(i++) - '0');
+
+        return new TimeOfDay(hour, minute, second);        
+    }
+}
diff --git a/common/java/com/android/common/OperationScheduler.java b/common/java/com/android/common/OperationScheduler.java
index 22dfe41..217b244 100644
--- a/common/java/com/android/common/OperationScheduler.java
+++ b/common/java/com/android/common/OperationScheduler.java
@@ -17,7 +17,6 @@
 package com.android.common;
 
 import android.content.SharedPreferences;
-import android.net.http.AndroidHttpClient;
 import android.text.format.Time;
 
 import java.util.Map;
@@ -275,7 +274,7 @@ public class OperationScheduler {
             return true;
         } catch (NumberFormatException nfe) {
             try {
-                setMoratoriumTimeMillis(AndroidHttpClient.parseDate(retryAfter));
+                setMoratoriumTimeMillis(LegacyHttpDateTime.parse(retryAfter));
                 return true;
             } catch (IllegalArgumentException iae) {
                 return false;
diff --git a/common/tests/Android.mk b/common/tests/Android.mk
index 7425552..58ba01b 100644
--- a/common/tests/Android.mk
+++ b/common/tests/Android.mk
@@ -19,7 +19,7 @@ LOCAL_CERTIFICATE := platform
 LOCAL_JAVA_LIBRARIES := android.test.runner
 LOCAL_MODULE_TAGS := tests
 LOCAL_PACKAGE_NAME := AndroidCommonTests
-LOCAL_SDK_VERSION := current
+LOCAL_SDK_VERSION := 8
 LOCAL_SRC_FILES := $(call all-java-files-under, src)
 LOCAL_STATIC_JAVA_LIBRARIES := android-common