109 lines
4.8 KiB
Plaintext
109 lines
4.8 KiB
Plaintext
/*
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* Copyright (C) 2005, 2008, 2012 Apple Inc. All rights reserved.
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* Copyright (C) 2006 Alexey Proskuryakov (ap@nypop.com)
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of Apple Inc. ("Apple") nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#import "config.h"
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#import "LoaderNSURLExtras.h"
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#import "LocalizedStrings.h"
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#import "MIMETypeRegistry.h"
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#import <wtf/Assertions.h>
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#import <wtf/URL.h>
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#import <wtf/Vector.h>
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#import <wtf/text/WTFString.h>
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using namespace WebCore;
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NSString *suggestedFilenameWithMIMEType(NSURL *url, const String& mimeType)
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{
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// Get the filename from the URL. Try the lastPathComponent first.
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NSString *lastPathComponent = [[url path] lastPathComponent];
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NSString *filename = filenameByFixingIllegalCharacters(lastPathComponent);
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NSString *extension = nil;
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if ([filename length] == 0 || [lastPathComponent isEqualToString:@"/"]) {
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// lastPathComponent is no good, try the host.
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auto host = URL(url).host().createNSString();
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filename = filenameByFixingIllegalCharacters(host.get());
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if ([filename length] == 0) {
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// Can't make a filename using this URL, use "unknown".
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filename = copyImageUnknownFileLabel();
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}
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} else {
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// Save the extension for later correction. Only correct the extension of the lastPathComponent.
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// For example, if the filename ends up being the host, we wouldn't want to correct ".com" in "www.apple.com".
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extension = [filename pathExtension];
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}
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// Do not correct filenames that are reported with a mime type of tar, and
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// have a filename which has .tar in it or ends in .tgz
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if ((mimeType == "application/tar" || mimeType == "application/x-tar")
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&& (String(filename).containsIgnoringASCIICase(".tar")
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|| String(filename).endsWithIgnoringASCIICase(".tgz"))) {
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return filename;
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}
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// I don't think we need to worry about this for the image case
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// If the type is known, check the extension and correct it if necessary.
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if (mimeType != "application/octet-stream" && mimeType != "text/plain") {
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Vector<String> extensions = MIMETypeRegistry::extensionsForMIMEType(mimeType);
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if (extensions.isEmpty() || !extensions.contains(String(extension))) {
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// The extension doesn't match the MIME type. Correct this.
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NSString *correctExtension = MIMETypeRegistry::preferredExtensionForMIMEType(mimeType);
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if ([correctExtension length] != 0) {
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// Append the correct extension.
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filename = [filename stringByAppendingPathExtension:correctExtension];
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}
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}
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}
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return filename;
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}
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NSString *filenameByFixingIllegalCharacters(NSString *string)
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{
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auto filename = adoptNS([string mutableCopy]);
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// Strip null characters.
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unichar nullChar = 0;
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[filename replaceOccurrencesOfString:[NSString stringWithCharacters:&nullChar length:0] withString:@"" options:0 range:NSMakeRange(0, [filename length])];
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// Replace "/" with "-".
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[filename replaceOccurrencesOfString:@"/" withString:@"-" options:0 range:NSMakeRange(0, [filename length])];
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// Replace ":" with "-".
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[filename replaceOccurrencesOfString:@":" withString:@"-" options:0 range:NSMakeRange(0, [filename length])];
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// Strip leading dots.
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while ([filename hasPrefix:@"."])
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[filename deleteCharactersInRange:NSMakeRange(0, 1)];
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return filename.autorelease();
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}
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