netwerk/protocol/viewsource/src/nsViewSourceHandler.cpp

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   4  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   5  *
   6  * The contents of this file are subject to the Mozilla Public License Version
   7  * 1.1 (the "License"); you may not use this file except in compliance with
   8  * the License. You may obtain a copy of the License at
   9  * http://www.mozilla.org/MPL/
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  11  * Software distributed under the License is distributed on an "AS IS" basis,
  12  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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  16  * The Original Code is mozilla.org code.
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  18  * The Initial Developer of the Original Code is
  19  * Netscape Communications Corporation.
  20  * Portions created by the Initial Developer are Copyright (C) 1998
  21  * the Initial Developer. All Rights Reserved.
  22  *
  23  * Contributor(s):
  24  *   Chak Nanga <chak@netscape.com>
  25  *   Darin Fisher <darin@meer.net>
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  27  * Alternatively, the contents of this file may be used under the terms of
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  39  * ***** END LICENSE BLOCK ***** */
  40
  41 #include "nsViewSourceHandler.h"
  42 #include "nsViewSourceChannel.h"
  43 #include "nsNetUtil.h"
  44 #include "nsSimpleNestedURI.h"
  45
  46 #define VIEW_SOURCE "view-source"
  47
  48 ////////////////////////////////////////////////////////////////////////////////
  49
  50 NS_IMPL_ISUPPORTS1(nsViewSourceHandler, nsIProtocolHandler)
  51
  52 ////////////////////////////////////////////////////////////////////////////////
  53 // nsIProtocolHandler methods:
  54
  55 NS_IMETHODIMP
  56 nsViewSourceHandler::GetScheme(nsACString &result)
  57 {
  58     result.AssignLiteral(VIEW_SOURCE);
  59     return NS_OK;
  60 }
  61
  62 NS_IMETHODIMP
  63 nsViewSourceHandler::GetDefaultPort(PRInt32 *result)
  64 {
  65     *result = -1;
  66     return NS_OK;
  67 }
  68
  69 NS_IMETHODIMP
  70 nsViewSourceHandler::GetProtocolFlags(PRUint32 *result)
  71 {
  72     *result = URI_NORELATIVE | URI_NOAUTH | URI_LOADABLE_BY_ANYONE |
  73         URI_NON_PERSISTABLE;
  74     return NS_OK;
  75 }
  76
  77 NS_IMETHODIMP
  78 nsViewSourceHandler::NewURI(const nsACString &aSpec,
  79                             const char *aCharset,
  80                             nsIURI *aBaseURI,
  81                             nsIURI **aResult)
  82 {
  83     *aResult = nsnull;
  84
  85     // Extract inner URL and normalize to ASCII.  This is done to properly
  86     // support IDN in cases like "view-source:http://www.szalagavató.hu/"
  87
  88     PRInt32 colon = aSpec.FindChar(':');
  89     if (colon == kNotFound)
  90         return NS_ERROR_MALFORMED_URI;
  91
  92     nsCOMPtr<nsIURI> innerURI;
  93     nsresult rv = NS_NewURI(getter_AddRefs(innerURI),
  94                             Substring(aSpec, colon + 1), aCharset);
  95     if (NS_FAILED(rv))
  96         return rv;
  97
  98     nsCAutoString asciiSpec;
  99     rv = innerURI->GetAsciiSpec(asciiSpec);
 100     if (NS_FAILED(rv))
 101         return rv;
 102
 103     // put back our scheme and construct a simple-uri wrapper
 104
 105     asciiSpec.Insert(VIEW_SOURCE ":", 0);
 106
 107     // We can't swap() from an nsRefPtr<nsSimpleNestedURI> to an nsIURI**,
 108     // sadly.
 109     nsSimpleNestedURI* ourURI = new nsSimpleNestedURI(innerURI);
 110     nsCOMPtr<nsIURI> uri = ourURI;
 111     if (!uri)
 112         return NS_ERROR_OUT_OF_MEMORY;
 113
 114     rv = ourURI->SetSpec(asciiSpec);
 115     if (NS_FAILED(rv))
 116         return rv;
 117
 118     // Make the URI immutable so it's impossible to get it out of sync
 119     // with its inner URI.
 120     ourURI->SetMutable(PR_FALSE);
 121
 122     uri.swap(*aResult);
 123     return rv;
 124 }
 125
 126 NS_IMETHODIMP
 127 nsViewSourceHandler::NewChannel(nsIURI* uri, nsIChannel* *result)
 128 {
 129     NS_ENSURE_ARG_POINTER(uri);
 130     nsViewSourceChannel *channel = new nsViewSourceChannel();
 131     if (!channel)
 132         return NS_ERROR_OUT_OF_MEMORY;
 133     NS_ADDREF(channel);
 134
 135     nsresult rv = channel->Init(uri);
 136     if (NS_FAILED(rv)) {
 137         NS_RELEASE(channel);
 138         return rv;
 139     }
 140
 141     *result = static_cast<nsIViewSourceChannel*>(channel);
 142     return NS_OK;
 143 }
 144
 145 NS_IMETHODIMP
 146 nsViewSourceHandler::AllowPort(PRInt32 port, const char *scheme, PRBool *_retval)
 147 {
 148     // don't override anything.
 149     *_retval = PR_FALSE;
 150     return NS_OK;
 151 }