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Copyright (c) 2009-2011 Dropbox Inc., http://www.dropbox.com/ Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "So...
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/* * Copyright (c) 2009-2011 Dropbox, Inc. */*from ww w . ja v a 2 s .com*/ * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package com.dropbox.client2.exception; import java.util.Map; import org.apache.http.Header; import org.apache.http.HttpResponse; import org.apache.http.StatusLine; /** * Wraps any non-200 HTTP responses from an API call. See the constants in this * class for the meaning of each error code. You'll typically only want to * handle a few specific error codes and show some kind of generic error or * retry for the rest. */ public class DropboxServerException extends DropboxException { public static class Error { /** English version of the error. */ public String error; /** The error in the user's locale, if intended to be displayed to the user. */ public String userError; public Map<String, Object> fields; @SuppressWarnings("unchecked") public Error(Map<String, Object> map) { fields = map; Object err = map.get("error"); if (err instanceof String) { error = (String)err; } else if (err instanceof Map<?, ?>) { Map<String, Object> detail = (Map<String, Object>)err; for (Object val: detail.values()) { if (val instanceof String) { error = (String)val; } } } Object uerr = map.get("user_error"); if (uerr instanceof String) { userError = (String)uerr; } } } /** The request was successful. This won't ever be thrown in an exception. */ public static final int _200_OK = 200; /** The request was successful for a Range request. This won't ever be thrown in an exception. */ public static final int _206_PARTIAL_CONTENT = 206; /** Moved to a new location temporarily. */ public static final int _302_FOUND = 302; /** * Contents have not changed (from the given hash, revision, ETag, or similar parameter). */ public static final int _304_NOT_MODIFIED = 304; /** Bad input parameter. Error message should indicate which one and why. */ public static final int _400_BAD_REQUEST = 400; /** Bad or expired access token. Need to re-authenticate user. */ public static final int _401_UNAUTHORIZED = 401; /** Usually from an invalid app key pair or other permanent error. */ public static final int _403_FORBIDDEN = 403; /** Path not found. */ public static final int _404_NOT_FOUND = 404; /** * Request method not allowed. You shouldn't see this unless writing your * own API calls. */ public static final int _405_METHOD_NOT_ALLOWED = 405; /** Too many metadata entries to return. */ public static final int _406_NOT_ACCEPTABLE = 406; public static final int _409_CONFLICT = 409; /** * Typically from trying to upload over HTTP using chunked encoding. The * Dropbox API currently does not support chunked transfer encoding. */ public static final int _411_LENGTH_REQUIRED = 411; /** When a thumbnail cannot be created for the input file. */ public static final int _415_UNSUPPORTED_MEDIA = 415; /** * Internal server error. Best to try again or wait until corrected by * Dropbox. */ public static final int _500_INTERNAL_SERVER_ERROR = 500; /** Not implemented. */ public static final int _501_NOT_IMPLEMENTED = 501; /** If a Dropbox server is down - try again later. */ public static final int _502_BAD_GATEWAY = 502; /** If a Dropbox server is not working properly - try again later. */ public static final int _503_SERVICE_UNAVAILABLE = 503; /** User is over quota. */ public static final int _507_INSUFFICIENT_STORAGE = 507; private static final long serialVersionUID = 1L; /** The body, if any, of the returned error. */ public Error body; /** The HTTP error code. */ public int error; /** The reason string associated with the error. */ public String reason; /** The server string from the headers. */ public String server; /** The location string from the headers (to handle redirects). */ public String location; /** * Creates a {@link DropboxServerException} from an {@link HttpResponse}. */ public DropboxServerException(HttpResponse response) { this.fillInStackTrace(); StatusLine status = response.getStatusLine(); error = status.getStatusCode(); reason = status.getReasonPhrase(); server = getHeader(response, "server"); location = getHeader(response, "location"); } public Map<String, Object> parsedResponse; /** * Creates a {@link DropboxServerException} from an {@link HttpResponse}. * The rest parameter must be a Map of String to Object. */ @SuppressWarnings("unchecked") public DropboxServerException(HttpResponse response, Object rest) { this(response); if (rest != null && rest instanceof Map<?, ?>) { parsedResponse = (Map<String, Object>)rest; body = new Error(parsedResponse); } } /** * When this exception comes from creating a new account, returns whether * the request failed because an account with the email address already * exists. */ public boolean isDuplicateAccount() { return (error == 400 && body != null && body.error.contains("taken")); } @Override public String toString() { return "DropboxServerException (" + server + "): " + error + " " + reason + " (" + body.error + ")"; } /** * Whether the given response is valid when it has no body (only some error * codes are allowed without a reason, currently 302 and 304). */ public static boolean isValidWithNullBody(HttpResponse response) { int code = response.getStatusLine().getStatusCode(); if (code == _302_FOUND) { String location = getHeader(response, "location"); if (location != null) { int loc = location.indexOf("://"); if (loc > -1) { location = location.substring(loc+3); loc = location.indexOf("/"); if (loc > -1) { location = location.substring(0, loc); if (location.toLowerCase().contains("dropbox.com")) { return true; } } } } } else if (code == _304_NOT_MODIFIED) { return true; } return false; } private static String getHeader(HttpResponse response, String name) { String value = null; Header serverheader = response.getFirstHeader(name); if (serverheader != null) { value = serverheader.getValue(); } return value; } }