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      1 /*
      2  * Copyright (C) 2005, 2008 Apple Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  *
      8  * 1.  Redistributions of source code must retain the above copyright
      9  *     notice, this list of conditions and the following disclaimer.
     10  * 2.  Redistributions in binary form must reproduce the above copyright
     11  *     notice, this list of conditions and the following disclaimer in the
     12  *     documentation and/or other materials provided with the distribution.
     13  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
     14  *     its contributors may be used to endorse or promote products derived
     15  *     from this software without specific prior written permission.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
     18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     20  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #import "WebDefaultPolicyDelegate.h"
     30 
     31 #import "WebDataSource.h"
     32 #import "WebFrame.h"
     33 #import "WebPolicyDelegatePrivate.h"
     34 #import "WebViewInternal.h"
     35 #import <Foundation/NSURLConnection.h>
     36 #import <Foundation/NSURLRequest.h>
     37 #import <Foundation/NSURLResponse.h>
     38 #import <wtf/Assertions.h>
     39 
     40 @implementation WebDefaultPolicyDelegate
     41 
     42 static WebDefaultPolicyDelegate *sharedDelegate = nil;
     43 
     44 // Return a object with vanilla implementations of the protocol's methods
     45 // Note this feature relies on our default delegate being stateless
     46 + (WebDefaultPolicyDelegate *)sharedPolicyDelegate
     47 {
     48     if (!sharedDelegate) {
     49         sharedDelegate = [[WebDefaultPolicyDelegate alloc] init];
     50     }
     51     return sharedDelegate;
     52 }
     53 
     54 - (void)webView: (WebView *)wv unableToImplementPolicyWithError:(NSError *)error frame:(WebFrame *)frame
     55 {
     56     LOG_ERROR("called unableToImplementPolicyWithError:%@ inFrame:%@", error, frame);
     57 }
     58 
     59 
     60 - (void)webView: (WebView *)wv decidePolicyForMIMEType:(NSString *)type
     61                                                request:(NSURLRequest *)request
     62                                                  frame:(WebFrame *)frame
     63                                       decisionListener:(id <WebPolicyDecisionListener>)listener
     64 {
     65     if ([[request URL] isFileURL]) {
     66         BOOL isDirectory = NO;
     67         BOOL exists = [[NSFileManager defaultManager] fileExistsAtPath:[[request URL] path] isDirectory:&isDirectory];
     68 
     69         if (exists && !isDirectory && [wv _canShowMIMEType:type])
     70             [listener use];
     71         else
     72             [listener ignore];
     73     } else if ([wv _canShowMIMEType:type])
     74         [listener use];
     75     else
     76         [listener ignore];
     77 }
     78 
     79 - (void)webView: (WebView *)wv decidePolicyForNavigationAction:(NSDictionary *)actionInformation
     80                                                        request:(NSURLRequest *)request
     81                                                          frame:(WebFrame *)frame
     82                                               decisionListener:(id <WebPolicyDecisionListener>)listener
     83 {
     84     WebNavigationType navType = [[actionInformation objectForKey:WebActionNavigationTypeKey] intValue];
     85 
     86     if ([WebView _canHandleRequest:request forMainFrame:frame == [wv mainFrame]]) {
     87         [listener use];
     88     } else if (navType == WebNavigationTypePlugInRequest) {
     89         [listener use];
     90     } else {
     91         // A file URL shouldn't fall through to here, but if it did,
     92         // it would be a security risk to open it.
     93         if (![[request URL] isFileURL]) {
     94             [[NSWorkspace sharedWorkspace] openURL:[request URL]];
     95         }
     96         [listener ignore];
     97     }
     98 }
     99 
    100 - (void)webView: (WebView *)wv decidePolicyForNewWindowAction:(NSDictionary *)actionInformation
    101                                                       request:(NSURLRequest *)request
    102                                                  newFrameName:(NSString *)frameName
    103                                              decisionListener:(id <WebPolicyDecisionListener>)listener
    104 {
    105     [listener use];
    106 }
    107 
    108 // Temporary SPI needed for <rdar://problem/3951283> can view pages from the back/forward cache that should be disallowed by Parental Controls
    109 - (BOOL)webView:(WebView *)webView shouldGoToHistoryItem:(WebHistoryItem *)item
    110 {
    111     return YES;
    112 }
    113 
    114 @end
    115 
    116