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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
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<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
<title>Nimbus: /Users/featherless/workbench/ios/nimbus/src/ASIHTTPRequest/src_optional/ASIWebPageRequest/ASIWebPageRequest.m Source File</title>
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<div id="projectname">Nimbus
 <span id="projectnumber">0.4.0.0 - <a href="http://github.com/jverkoey/nimbus">Nimbus is proudly hosted on Github</a></span>
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<div class="title">/Users/featherless/workbench/ios/nimbus/src/ASIHTTPRequest/src_optional/ASIWebPageRequest/ASIWebPageRequest.m</div> </div>
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<div class="contents">
<div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">//</span>
<a name="l00002"></a>00002 <span class="comment">// ASIWebPageRequest.m</span>
<a name="l00003"></a>00003 <span class="comment">// Part of ASIHTTPRequest -> http://allseeing-i.com/ASIHTTPRequest</span>
<a name="l00004"></a>00004 <span class="comment">//</span>
<a name="l00005"></a>00005 <span class="comment">// Created by Ben Copsey on 29/06/2010.</span>
<a name="l00006"></a>00006 <span class="comment">// Copyright 2010 All-Seeing Interactive. All rights reserved.</span>
<a name="l00007"></a>00007 <span class="comment">//</span>
<a name="l00008"></a>00008 <span class="comment">// This is an EXPERIMENTAL class - use at your own risk!</span>
<a name="l00009"></a>00009
<a name="l00010"></a>00010 <span class="preprocessor">#import "ASIWebPageRequest.h"</span>
<a name="l00011"></a>00011 <span class="preprocessor">#import "ASINetworkQueue.h"</span>
<a name="l00012"></a>00012 <span class="preprocessor">#import <CommonCrypto/CommonHMAC.h></span>
<a name="l00013"></a>00013
<a name="l00014"></a>00014 <span class="comment">// An xPath query that controls the external resources ASIWebPageRequest will fetch</span>
<a name="l00015"></a>00015 <span class="comment">// By default, it will fetch stylesheets, javascript files, images, frames, iframes, and html 5 video / audio</span>
<a name="l00016"></a>00016 <span class="keyword">static</span> xmlChar *xpathExpr = (xmlChar *)<span class="stringliteral">"//link/@href|//a/@href|//script/@src|//img/@src|//frame/@src|//iframe/@src|//style|//*/@style|//source/@src|//video/@poster|//audio/@src"</span>;
<a name="l00017"></a>00017
<a name="l00018"></a>00018 <span class="keyword">static</span> NSLock *xmlParsingLock = nil;
<a name="l00019"></a>00019 <span class="keyword">static</span> NSMutableArray *requestsUsingXMLParser = nil;
<a name="l00020"></a>00020
<a name="l00021"></a>00021 <span class="keyword">@interface </span>ASIWebPageRequest ()
<a name="l00022"></a>00022 - (void)readResourceURLs;
<a name="l00023"></a>00023 - (void)updateResourceURLs;
<a name="l00024"></a>00024 - (void)parseAsHTML;
<a name="l00025"></a>00025 - (void)parseAsCSS;
<a name="l00026"></a>00026 - (void)addURLToFetch:(<a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *)newURL;
<a name="l00027"></a>00027 + (NSArray *)CSSURLsFromString:(<a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *)string;
<a name="l00028"></a>00028 - (<a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *)relativePathTo:(<a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *)destinationPath fromPath:(<a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *)sourcePath;
<a name="l00029"></a>00029
<a name="l00030"></a>00030 - (void)finishedFetchingExternalResources:(ASINetworkQueue *)queue;
<a name="l00031"></a>00031 - (void)externalResourceFetchSucceeded:(ASIHTTPRequest *)externalResourceRequest;
<a name="l00032"></a>00032 - (void)externalResourceFetchFailed:(ASIHTTPRequest *)externalResourceRequest;
<a name="l00033"></a>00033
<a name="l00034"></a>00034 <span class="keyword">@property</span> (retain, nonatomic) ASINetworkQueue *externalResourceQueue;
<a name="l00035"></a>00035 <span class="keyword">@property</span> (retain, nonatomic) NSMutableDictionary *resourceList;
<a name="l00036"></a>00036 <span class="keyword">@end</span>
<a name="l00037"></a>00037
<a name="l00038"></a>00038 <span class="keyword">@implementation </span>ASIWebPageRequest
<a name="l00039"></a>00039
<a name="l00040"></a>00040 + (void)initialize
<a name="l00041"></a>00041 {
<a name="l00042"></a>00042 <span class="keywordflow">if</span> (<span class="keyword">self</span> == [ASIWebPageRequest <span class="keyword">class</span>]) {
<a name="l00043"></a>00043 xmlParsingLock = [[NSLock alloc] init];
<a name="l00044"></a>00044 requestsUsingXMLParser = [[NSMutableArray alloc] init];
<a name="l00045"></a>00045 }
<a name="l00046"></a>00046 }
<a name="l00047"></a>00047
<a name="l00048"></a>00048 - (void)dealloc
<a name="l00049"></a>00049 {
<a name="l00050"></a>00050 [externalResourceQueue cancelAllOperations];
<a name="l00051"></a>00051 [externalResourceQueue release];
<a name="l00052"></a>00052 [resourceList release];
<a name="l00053"></a>00053 [parentRequest release];
<a name="l00054"></a>00054 [<span class="keyword">super</span> dealloc];
<a name="l00055"></a>00055 }
<a name="l00056"></a>00056
<a name="l00057"></a>00057 <span class="comment">// This is a bit of a hack</span>
<a name="l00058"></a>00058 <span class="comment">// The role of this method in normal ASIHTTPRequests is to tell the queue we are done with the request, and perform some cleanup</span>
<a name="l00059"></a>00059 <span class="comment">// We override it to stop that happening, and instead do that work in the bottom of finishedFetchingExternalResources:</span>
<a name="l00060"></a>00060 - (void)markAsFinished
<a name="l00061"></a>00061 {
<a name="l00062"></a>00062 }
<a name="l00063"></a>00063
<a name="l00064"></a>00064 <span class="comment">// This method is normally responsible for telling delegates we are done, but it happens to be the most convenient place to parse the responses</span>
<a name="l00065"></a>00065 <span class="comment">// Again, we call the super implementation in finishedFetchingExternalResources:, or here if this download was not an HTML or CSS file</span>
<a name="l00066"></a>00066 - (void)requestFinished
<a name="l00067"></a>00067 {
<a name="l00068"></a>00068 complete = NO;
<a name="l00069"></a>00069 <span class="keywordflow">if</span> ([<span class="keyword">self</span> mainRequest] || [<span class="keyword">self</span> didUseCachedResponse]) {
<a name="l00070"></a>00070 [<span class="keyword">super</span> requestFinished];
<a name="l00071"></a>00071 [<span class="keyword">super</span> markAsFinished];
<a name="l00072"></a>00072 <span class="keywordflow">return</span>;
<a name="l00073"></a>00073 }
<a name="l00074"></a>00074 webContentType = ASINotParsedWebContentType;
<a name="l00075"></a>00075 <a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *contentType = [[[<span class="keyword">self</span> responseHeaders] objectForKey:@"Content-Type"] lowercaseString];
<a name="l00076"></a>00076 contentType = [[contentType componentsSeparatedByString:@";"] objectAtIndex:0];
<a name="l00077"></a>00077 <span class="keywordflow">if</span> ([contentType isEqualToString:<span class="stringliteral">@"text/html"</span>] || [contentType isEqualToString:<span class="stringliteral">@"text/xhtml"</span>] || [contentType isEqualToString:<span class="stringliteral">@"text/xhtml+xml"</span>] || [contentType isEqualToString:<span class="stringliteral">@"application/xhtml+xml"</span>]) {
<a name="l00078"></a>00078 [<span class="keyword">self</span> parseAsHTML];
<a name="l00079"></a>00079 <span class="keywordflow">return</span>;
<a name="l00080"></a>00080 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> ([contentType isEqualToString:<span class="stringliteral">@"text/css"</span>]) {
<a name="l00081"></a>00081 [<span class="keyword">self</span> parseAsCSS];
<a name="l00082"></a>00082 <span class="keywordflow">return</span>;
<a name="l00083"></a>00083 }
<a name="l00084"></a>00084 [<span class="keyword">super</span> requestFinished];
<a name="l00085"></a>00085 [<span class="keyword">super</span> markAsFinished];
<a name="l00086"></a>00086 }
<a name="l00087"></a>00087
<a name="l00088"></a>00088 - (void)parseAsCSS
<a name="l00089"></a>00089 {
<a name="l00090"></a>00090 webContentType = ASICSSWebContentType;
<a name="l00091"></a>00091
<a name="l00092"></a>00092 <a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *responseCSS = nil;
<a name="l00093"></a>00093 NSError *err = nil;
<a name="l00094"></a>00094 <span class="keywordflow">if</span> ([<span class="keyword">self</span> downloadDestinationPath]) {
<a name="l00095"></a>00095 responseCSS = [<a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> stringWithContentsOfFile:[<span class="keyword">self</span> downloadDestinationPath] encoding:[<span class="keyword">self</span> responseEncoding] error:&err];
<a name="l00096"></a>00096 } <span class="keywordflow">else</span> {
<a name="l00097"></a>00097 responseCSS = [<span class="keyword">self</span> responseString];
<a name="l00098"></a>00098 }
<a name="l00099"></a>00099 <span class="keywordflow">if</span> (err) {
<a name="l00100"></a>00100 [<span class="keyword">self</span> failWithError:[NSError errorWithDomain:NetworkRequestErrorDomain code:100 userInfo:[NSDictionary dictionaryWithObjectsAndKeys:@"Unable to read HTML string from response",NSLocalizedDescriptionKey,err,NSUnderlyingErrorKey,nil]]];
<a name="l00101"></a>00101 <span class="keywordflow">return</span>;
<a name="l00102"></a>00102 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (!responseCSS) {
<a name="l00103"></a>00103 [<span class="keyword">self</span> failWithError:[NSError errorWithDomain:NetworkRequestErrorDomain code:100 userInfo:[NSDictionary dictionaryWithObjectsAndKeys:@"Unable to read HTML string from response",NSLocalizedDescriptionKey,nil]]];
<a name="l00104"></a>00104 <span class="keywordflow">return</span>;
<a name="l00105"></a>00105 }
<a name="l00106"></a>00106 NSArray *urls = [[<span class="keyword">self</span> class] CSSURLsFromString:responseCSS];
<a name="l00107"></a>00107
<a name="l00108"></a>00108 [<span class="keyword">self</span> setResourceList:[NSMutableDictionary dictionary]];
<a name="l00109"></a>00109
<a name="l00110"></a>00110 <span class="keywordflow">for</span> (<a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *theURL in urls) {
<a name="l00111"></a>00111 [<span class="keyword">self</span> addURLToFetch:theURL];
<a name="l00112"></a>00112 }
<a name="l00113"></a>00113 <span class="keywordflow">if</span> (![[<span class="keyword">self</span> resourceList] count]) {
<a name="l00114"></a>00114 [<span class="keyword">super</span> requestFinished];
<a name="l00115"></a>00115 [<span class="keyword">super</span> markAsFinished];
<a name="l00116"></a>00116 <span class="keywordflow">return</span>;
<a name="l00117"></a>00117 }
<a name="l00118"></a>00118
<a name="l00119"></a>00119 <span class="comment">// Create a new request for every item in the queue</span>
<a name="l00120"></a>00120 [[<span class="keyword">self</span> externalResourceQueue] cancelAllOperations];
<a name="l00121"></a>00121 [<span class="keyword">self</span> setExternalResourceQueue:[ASINetworkQueue queue]];
<a name="l00122"></a>00122 [[<span class="keyword">self</span> externalResourceQueue] setDelegate:self];
<a name="l00123"></a>00123 [[<span class="keyword">self</span> externalResourceQueue] setShowAccurateProgress:[<span class="keyword">self</span> showAccurateProgress]];
<a name="l00124"></a>00124 [[<span class="keyword">self</span> externalResourceQueue] setQueueDidFinishSelector:@selector(finishedFetchingExternalResources:)];
<a name="l00125"></a>00125 [[<span class="keyword">self</span> externalResourceQueue] setRequestDidFinishSelector:@selector(externalResourceFetchSucceeded:)];
<a name="l00126"></a>00126 [[<span class="keyword">self</span> externalResourceQueue] setRequestDidFailSelector:@selector(externalResourceFetchFailed:)];
<a name="l00127"></a>00127 <span class="keywordflow">for</span> (<a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *theURL in [[<span class="keyword">self</span> resourceList] keyEnumerator]) {
<a name="l00128"></a>00128 ASIWebPageRequest *externalResourceRequest = [ASIWebPageRequest requestWithURL:[NSURL URLWithString:theURL relativeToURL:[<span class="keyword">self</span> url]]];
<a name="l00129"></a>00129 [externalResourceRequest setRequestHeaders:[<span class="keyword">self</span> requestHeaders]];
<a name="l00130"></a>00130 [externalResourceRequest setDownloadCache:[<span class="keyword">self</span> downloadCache]];
<a name="l00131"></a>00131 [externalResourceRequest setCachePolicy:[<span class="keyword">self</span> cachePolicy]];
<a name="l00132"></a>00132 [externalResourceRequest setCacheStoragePolicy:[<span class="keyword">self</span> cacheStoragePolicy]];
<a name="l00133"></a>00133 [externalResourceRequest setUserInfo:[NSDictionary dictionaryWithObject:theURL forKey:@"Path"]];
<a name="l00134"></a>00134 [externalResourceRequest setParentRequest:self];
<a name="l00135"></a>00135 [externalResourceRequest setUrlReplacementMode:[<span class="keyword">self</span> urlReplacementMode]];
<a name="l00136"></a>00136 [externalResourceRequest setShouldResetDownloadProgress:NO];
<a name="l00137"></a>00137 [externalResourceRequest setDelegate:self];
<a name="l00138"></a>00138 [externalResourceRequest setUploadProgressDelegate:self];
<a name="l00139"></a>00139 [externalResourceRequest setDownloadProgressDelegate:self];
<a name="l00140"></a>00140 <span class="keywordflow">if</span> ([<span class="keyword">self</span> downloadDestinationPath]) {
<a name="l00141"></a>00141 [externalResourceRequest setDownloadDestinationPath:[<span class="keyword">self</span> cachePathForRequest:externalResourceRequest]];
<a name="l00142"></a>00142 }
<a name="l00143"></a>00143 [[<span class="keyword">self</span> externalResourceQueue] addOperation:externalResourceRequest];
<a name="l00144"></a>00144 }
<a name="l00145"></a>00145 [[<span class="keyword">self</span> externalResourceQueue] go];
<a name="l00146"></a>00146 }
<a name="l00147"></a>00147
<a name="l00148"></a>00148 - (const <span class="keywordtype">char</span> *)encodingName
<a name="l00149"></a>00149 {
<a name="l00150"></a>00150 xmlCharEncoding encoding = XML_CHAR_ENCODING_NONE;
<a name="l00151"></a>00151 <span class="keywordflow">switch</span> ([<span class="keyword">self</span> responseEncoding])
<a name="l00152"></a>00152 {
<a name="l00153"></a>00153 <span class="keywordflow">case</span> NSASCIIStringEncoding:
<a name="l00154"></a>00154 encoding = XML_CHAR_ENCODING_ASCII;
<a name="l00155"></a>00155 <span class="keywordflow">break</span>;
<a name="l00156"></a>00156 <span class="keywordflow">case</span> NSJapaneseEUCStringEncoding:
<a name="l00157"></a>00157 encoding = XML_CHAR_ENCODING_EUC_JP;
<a name="l00158"></a>00158 <span class="keywordflow">break</span>;
<a name="l00159"></a>00159 <span class="keywordflow">case</span> NSUTF8StringEncoding:
<a name="l00160"></a>00160 encoding = XML_CHAR_ENCODING_UTF8;
<a name="l00161"></a>00161 <span class="keywordflow">break</span>;
<a name="l00162"></a>00162 <span class="keywordflow">case</span> NSISOLatin1StringEncoding:
<a name="l00163"></a>00163 encoding = XML_CHAR_ENCODING_8859_1;
<a name="l00164"></a>00164 <span class="keywordflow">break</span>;
<a name="l00165"></a>00165 <span class="keywordflow">case</span> NSShiftJISStringEncoding:
<a name="l00166"></a>00166 encoding = XML_CHAR_ENCODING_SHIFT_JIS;
<a name="l00167"></a>00167 <span class="keywordflow">break</span>;
<a name="l00168"></a>00168 <span class="keywordflow">case</span> NSISOLatin2StringEncoding:
<a name="l00169"></a>00169 encoding = XML_CHAR_ENCODING_8859_2;
<a name="l00170"></a>00170 <span class="keywordflow">break</span>;
<a name="l00171"></a>00171 <span class="keywordflow">case</span> NSISO2022JPStringEncoding:
<a name="l00172"></a>00172 encoding = XML_CHAR_ENCODING_2022_JP;
<a name="l00173"></a>00173 <span class="keywordflow">break</span>;
<a name="l00174"></a>00174 <span class="keywordflow">case</span> NSUTF16BigEndianStringEncoding:
<a name="l00175"></a>00175 encoding = XML_CHAR_ENCODING_UTF16BE;
<a name="l00176"></a>00176 <span class="keywordflow">break</span>;
<a name="l00177"></a>00177 <span class="keywordflow">case</span> NSUTF16LittleEndianStringEncoding:
<a name="l00178"></a>00178 encoding = XML_CHAR_ENCODING_UTF16LE;
<a name="l00179"></a>00179 <span class="keywordflow">break</span>;
<a name="l00180"></a>00180 <span class="keywordflow">case</span> NSUTF32BigEndianStringEncoding:
<a name="l00181"></a>00181 encoding = XML_CHAR_ENCODING_UCS4BE;
<a name="l00182"></a>00182 <span class="keywordflow">break</span>;
<a name="l00183"></a>00183 <span class="keywordflow">case</span> NSUTF32LittleEndianStringEncoding:
<a name="l00184"></a>00184 encoding = XML_CHAR_ENCODING_UCS4LE;
<a name="l00185"></a>00185 <span class="keywordflow">break</span>;
<a name="l00186"></a>00186 <span class="keywordflow">case</span> NSNEXTSTEPStringEncoding:
<a name="l00187"></a>00187 <span class="keywordflow">case</span> NSSymbolStringEncoding:
<a name="l00188"></a>00188 <span class="keywordflow">case</span> NSNonLossyASCIIStringEncoding:
<a name="l00189"></a>00189 <span class="keywordflow">case</span> NSUnicodeStringEncoding:
<a name="l00190"></a>00190 <span class="keywordflow">case</span> NSMacOSRomanStringEncoding:
<a name="l00191"></a>00191 <span class="keywordflow">case</span> NSUTF32StringEncoding:
<a name="l00192"></a>00192 <span class="keywordflow">default</span>:
<a name="l00193"></a>00193 encoding = XML_CHAR_ENCODING_ERROR;
<a name="l00194"></a>00194 <span class="keywordflow">break</span>;
<a name="l00195"></a>00195 }
<a name="l00196"></a>00196 <span class="keywordflow">return</span> xmlGetCharEncodingName(encoding);
<a name="l00197"></a>00197 }
<a name="l00198"></a>00198
<a name="l00199"></a>00199 - (void)parseAsHTML
<a name="l00200"></a>00200 {
<a name="l00201"></a>00201 webContentType = ASIHTMLWebContentType;
<a name="l00202"></a>00202
<a name="l00203"></a>00203 <span class="comment">// Only allow parsing of a single document at a time</span>
<a name="l00204"></a>00204 [xmlParsingLock lock];
<a name="l00205"></a>00205
<a name="l00206"></a>00206 <span class="keywordflow">if</span> (![requestsUsingXMLParser count]) {
<a name="l00207"></a>00207 xmlInitParser();
<a name="l00208"></a>00208 }
<a name="l00209"></a>00209 [requestsUsingXMLParser addObject:self];
<a name="l00210"></a>00210
<a name="l00211"></a>00211
<a name="l00212"></a>00212 <span class="comment">/* Load XML document */</span>
<a name="l00213"></a>00213 <span class="keywordflow">if</span> ([<span class="keyword">self</span> downloadDestinationPath]) {
<a name="l00214"></a>00214 doc = htmlReadFile([[<span class="keyword">self</span> downloadDestinationPath] cStringUsingEncoding:NSUTF8StringEncoding], [<span class="keyword">self</span> encodingName], HTML_PARSE_NONET | HTML_PARSE_NOWARNING | HTML_PARSE_NOERROR);
<a name="l00215"></a>00215 } <span class="keywordflow">else</span> {
<a name="l00216"></a>00216 <a class="code" href="class_n_s_data.html" title="For hashing raw data.">NSData</a> *data = [<span class="keyword">self</span> responseData];
<a name="l00217"></a>00217 doc = htmlReadMemory([data bytes], (<span class="keywordtype">int</span>)[data length], <span class="stringliteral">""</span>, [<span class="keyword">self</span> encodingName], HTML_PARSE_NONET | HTML_PARSE_NOWARNING | HTML_PARSE_NOERROR);
<a name="l00218"></a>00218 }
<a name="l00219"></a>00219 <span class="keywordflow">if</span> (doc == NULL) {
<a name="l00220"></a>00220 [<span class="keyword">self</span> failWithError:[NSError errorWithDomain:NetworkRequestErrorDomain code:101 userInfo:[NSDictionary dictionaryWithObjectsAndKeys:@"Error: unable to parse reponse XML",NSLocalizedDescriptionKey,nil]]];
<a name="l00221"></a>00221 <span class="keywordflow">return</span>;
<a name="l00222"></a>00222 }
<a name="l00223"></a>00223
<a name="l00224"></a>00224 [<span class="keyword">self</span> setResourceList:[NSMutableDictionary dictionary]];
<a name="l00225"></a>00225
<a name="l00226"></a>00226 <span class="comment">// Populate the list of URLS to download</span>
<a name="l00227"></a>00227 [<span class="keyword">self</span> readResourceURLs];
<a name="l00228"></a>00228
<a name="l00229"></a>00229 <span class="keywordflow">if</span> ([<span class="keyword">self</span> error] || ![[<span class="keyword">self</span> resourceList] count]) {
<a name="l00230"></a>00230 [requestsUsingXMLParser removeObject:self];
<a name="l00231"></a>00231 xmlFreeDoc(doc);
<a name="l00232"></a>00232 doc = NULL;
<a name="l00233"></a>00233 }
<a name="l00234"></a>00234
<a name="l00235"></a>00235 [xmlParsingLock unlock];
<a name="l00236"></a>00236
<a name="l00237"></a>00237 <span class="keywordflow">if</span> ([<span class="keyword">self</span> error]) {
<a name="l00238"></a>00238 <span class="keywordflow">return</span>;
<a name="l00239"></a>00239 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (![[<span class="keyword">self</span> resourceList] count]) {
<a name="l00240"></a>00240 [<span class="keyword">super</span> requestFinished];
<a name="l00241"></a>00241 [<span class="keyword">super</span> markAsFinished];
<a name="l00242"></a>00242 <span class="keywordflow">return</span>;
<a name="l00243"></a>00243 }
<a name="l00244"></a>00244
<a name="l00245"></a>00245 <span class="comment">// Create a new request for every item in the queue</span>
<a name="l00246"></a>00246 [[<span class="keyword">self</span> externalResourceQueue] cancelAllOperations];
<a name="l00247"></a>00247 [<span class="keyword">self</span> setExternalResourceQueue:[ASINetworkQueue queue]];
<a name="l00248"></a>00248 [[<span class="keyword">self</span> externalResourceQueue] setDelegate:self];
<a name="l00249"></a>00249 [[<span class="keyword">self</span> externalResourceQueue] setShowAccurateProgress:[<span class="keyword">self</span> showAccurateProgress]];
<a name="l00250"></a>00250 [[<span class="keyword">self</span> externalResourceQueue] setQueueDidFinishSelector:@selector(finishedFetchingExternalResources:)];
<a name="l00251"></a>00251 [[<span class="keyword">self</span> externalResourceQueue] setRequestDidFinishSelector:@selector(externalResourceFetchSucceeded:)];
<a name="l00252"></a>00252 [[<span class="keyword">self</span> externalResourceQueue] setRequestDidFailSelector:@selector(externalResourceFetchFailed:)];
<a name="l00253"></a>00253 <span class="keywordflow">for</span> (<a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *theURL in [[<span class="keyword">self</span> resourceList] keyEnumerator]) {
<a name="l00254"></a>00254 ASIWebPageRequest *externalResourceRequest = [ASIWebPageRequest requestWithURL:[NSURL URLWithString:theURL relativeToURL:[<span class="keyword">self</span> url]]];
<a name="l00255"></a>00255 [externalResourceRequest setRequestHeaders:[<span class="keyword">self</span> requestHeaders]];
<a name="l00256"></a>00256 [externalResourceRequest setDownloadCache:[<span class="keyword">self</span> downloadCache]];
<a name="l00257"></a>00257 [externalResourceRequest setCachePolicy:[<span class="keyword">self</span> cachePolicy]];
<a name="l00258"></a>00258 [externalResourceRequest setCacheStoragePolicy:[<span class="keyword">self</span> cacheStoragePolicy]];
<a name="l00259"></a>00259 [externalResourceRequest setUserInfo:[NSDictionary dictionaryWithObject:theURL forKey:@"Path"]];
<a name="l00260"></a>00260 [externalResourceRequest setParentRequest:self];
<a name="l00261"></a>00261 [externalResourceRequest setUrlReplacementMode:[<span class="keyword">self</span> urlReplacementMode]];
<a name="l00262"></a>00262 [externalResourceRequest setShouldResetDownloadProgress:NO];
<a name="l00263"></a>00263 [externalResourceRequest setDelegate:self];
<a name="l00264"></a>00264 [externalResourceRequest setUploadProgressDelegate:self];
<a name="l00265"></a>00265 [externalResourceRequest setDownloadProgressDelegate:self];
<a name="l00266"></a>00266 <span class="keywordflow">if</span> ([<span class="keyword">self</span> downloadDestinationPath]) {
<a name="l00267"></a>00267 [externalResourceRequest setDownloadDestinationPath:[<span class="keyword">self</span> cachePathForRequest:externalResourceRequest]];
<a name="l00268"></a>00268 }
<a name="l00269"></a>00269 [[<span class="keyword">self</span> externalResourceQueue] addOperation:externalResourceRequest];
<a name="l00270"></a>00270 }
<a name="l00271"></a>00271 [[<span class="keyword">self</span> externalResourceQueue] go];
<a name="l00272"></a>00272 }
<a name="l00273"></a>00273
<a name="l00274"></a>00274 - (void)externalResourceFetchSucceeded:(ASIHTTPRequest *)externalResourceRequest
<a name="l00275"></a>00275 {
<a name="l00276"></a>00276 <a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *originalPath = [[externalResourceRequest userInfo] objectForKey:@"Path"];
<a name="l00277"></a>00277 NSMutableDictionary *requestResponse = [[<span class="keyword">self</span> resourceList] objectForKey:originalPath];
<a name="l00278"></a>00278 <a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *contentType = [[externalResourceRequest responseHeaders] objectForKey:@"Content-Type"];
<a name="l00279"></a>00279 <span class="keywordflow">if</span> (!contentType) {
<a name="l00280"></a>00280 contentType = <span class="stringliteral">@"application/octet-stream"</span>;
<a name="l00281"></a>00281 }
<a name="l00282"></a>00282 [requestResponse setObject:contentType forKey:@"ContentType"];
<a name="l00283"></a>00283 <span class="keywordflow">if</span> ([<span class="keyword">self</span> downloadDestinationPath]) {
<a name="l00284"></a>00284 [requestResponse setObject:[externalResourceRequest downloadDestinationPath] forKey:@"DataPath"];
<a name="l00285"></a>00285 } <span class="keywordflow">else</span> {
<a name="l00286"></a>00286 <a class="code" href="class_n_s_data.html" title="For hashing raw data.">NSData</a> *data = [externalResourceRequest responseData];
<a name="l00287"></a>00287 <span class="keywordflow">if</span> (data) {
<a name="l00288"></a>00288 [requestResponse setObject:data forKey:@"Data"];
<a name="l00289"></a>00289 }
<a name="l00290"></a>00290 }
<a name="l00291"></a>00291 }
<a name="l00292"></a>00292
<a name="l00293"></a>00293 - (void)externalResourceFetchFailed:(ASIHTTPRequest *)externalResourceRequest
<a name="l00294"></a>00294 {
<a name="l00295"></a>00295 [<span class="keyword">self</span> failWithError:[externalResourceRequest error]];
<a name="l00296"></a>00296 }
<a name="l00297"></a>00297
<a name="l00298"></a>00298 - (void)finishedFetchingExternalResources:(ASINetworkQueue *)queue
<a name="l00299"></a>00299 {
<a name="l00300"></a>00300 <span class="keywordflow">if</span> ([<span class="keyword">self</span> urlReplacementMode] != ASIDontModifyURLs) {
<a name="l00301"></a>00301 <span class="keywordflow">if</span> (webContentType == ASICSSWebContentType) {
<a name="l00302"></a>00302 NSMutableString *parsedResponse;
<a name="l00303"></a>00303 NSError *err = nil;
<a name="l00304"></a>00304 <span class="keywordflow">if</span> ([<span class="keyword">self</span> downloadDestinationPath]) {
<a name="l00305"></a>00305 parsedResponse = [NSMutableString stringWithContentsOfFile:[<span class="keyword">self</span> downloadDestinationPath] encoding:[<span class="keyword">self</span> responseEncoding] error:&err];
<a name="l00306"></a>00306 } <span class="keywordflow">else</span> {
<a name="l00307"></a>00307 parsedResponse = [[[<span class="keyword">self</span> responseString] mutableCopy] autorelease];
<a name="l00308"></a>00308 }
<a name="l00309"></a>00309 <span class="keywordflow">if</span> (err) {
<a name="l00310"></a>00310 [<span class="keyword">self</span> failWithError:[NSError errorWithDomain:NetworkRequestErrorDomain code:101 userInfo:[NSDictionary dictionaryWithObjectsAndKeys:@"Error: unable to read response CSS from disk",NSLocalizedDescriptionKey,nil]]];
<a name="l00311"></a>00311 <span class="keywordflow">return</span>;
<a name="l00312"></a>00312 }
<a name="l00313"></a>00313 <span class="keywordflow">if</span> (![<span class="keyword">self</span> error]) {
<a name="l00314"></a>00314 <span class="keywordflow">for</span> (<a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *resource in [[<span class="keyword">self</span> resourceList] keyEnumerator]) {
<a name="l00315"></a>00315 <span class="keywordflow">if</span> ([parsedResponse rangeOfString:resource].location != NSNotFound) {
<a name="l00316"></a>00316 <a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *newURL = [<span class="keyword">self</span> contentForExternalURL:resource];
<a name="l00317"></a>00317 <span class="keywordflow">if</span> (newURL) {
<a name="l00318"></a>00318 [parsedResponse replaceOccurrencesOfString:resource withString:newURL options:0 range:NSMakeRange(0, [parsedResponse length])];
<a name="l00319"></a>00319 }
<a name="l00320"></a>00320 }
<a name="l00321"></a>00321 }
<a name="l00322"></a>00322 }
<a name="l00323"></a>00323 <span class="keywordflow">if</span> ([<span class="keyword">self</span> downloadDestinationPath]) {
<a name="l00324"></a>00324 [parsedResponse writeToFile:[<span class="keyword">self</span> downloadDestinationPath] atomically:NO encoding:[<span class="keyword">self</span> responseEncoding] error:&err];
<a name="l00325"></a>00325 <span class="keywordflow">if</span> (err) {
<a name="l00326"></a>00326 [<span class="keyword">self</span> failWithError:[NSError errorWithDomain:NetworkRequestErrorDomain code:101 userInfo:[NSDictionary dictionaryWithObjectsAndKeys:@"Error: unable to write response CSS to disk",NSLocalizedDescriptionKey,nil]]];
<a name="l00327"></a>00327 <span class="keywordflow">return</span>;
<a name="l00328"></a>00328 }
<a name="l00329"></a>00329 } <span class="keywordflow">else</span> {
<a name="l00330"></a>00330 [<span class="keyword">self</span> setRawResponseData:(id)[parsedResponse dataUsingEncoding:[<span class="keyword">self</span> responseEncoding]]];
<a name="l00331"></a>00331 }
<a name="l00332"></a>00332 } <span class="keywordflow">else</span> {
<a name="l00333"></a>00333 [xmlParsingLock lock];
<a name="l00334"></a>00334
<a name="l00335"></a>00335 [<span class="keyword">self</span> updateResourceURLs];
<a name="l00336"></a>00336
<a name="l00337"></a>00337 <span class="keywordflow">if</span> (![<span class="keyword">self</span> error]) {
<a name="l00338"></a>00338
<a name="l00339"></a>00339 <span class="comment">// We'll use the xmlsave API so we can strip the xml declaration</span>
<a name="l00340"></a>00340 xmlSaveCtxtPtr saveContext;
<a name="l00341"></a>00341
<a name="l00342"></a>00342 <span class="keywordflow">if</span> ([<span class="keyword">self</span> downloadDestinationPath]) {
<a name="l00343"></a>00343
<a name="l00344"></a>00344 <span class="comment">// Truncate the file first</span>
<a name="l00345"></a>00345 [[[[NSFileManager alloc] init] autorelease] createFileAtPath:[<span class="keyword">self</span> downloadDestinationPath] contents:nil attributes:nil];
<a name="l00346"></a>00346
<a name="l00347"></a>00347 saveContext = xmlSaveToFd([[NSFileHandle fileHandleForWritingAtPath:[<span class="keyword">self</span> downloadDestinationPath]] fileDescriptor],NULL,2); <span class="comment">// 2 == XML_SAVE_NO_DECL, this isn't declared on Mac OS 10.5</span>
<a name="l00348"></a>00348 xmlSaveDoc(saveContext, doc);
<a name="l00349"></a>00349 xmlSaveClose(saveContext);
<a name="l00350"></a>00350
<a name="l00351"></a>00351 } <span class="keywordflow">else</span> {
<a name="l00352"></a>00352 <span class="preprocessor"> #if TARGET_OS_MAC && MAC_OS_X_VERSION_MAX_ALLOWED <= __MAC_10_5</span>
<a name="l00353"></a>00353 <span class="preprocessor"></span> <span class="comment">// xmlSaveToBuffer() is not implemented in the 10.5 version of libxml</span>
<a name="l00354"></a>00354 <a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *tempPath = [NSTemporaryDirectory() stringByAppendingPathComponent:[[NSProcessInfo processInfo] globallyUniqueString]];
<a name="l00355"></a>00355 [[[[NSFileManager alloc] init] autorelease] createFileAtPath:tempPath contents:nil attributes:nil];
<a name="l00356"></a>00356 saveContext = xmlSaveToFd([[NSFileHandle fileHandleForWritingAtPath:tempPath] fileDescriptor],NULL,2); <span class="comment">// 2 == XML_SAVE_NO_DECL, this isn't declared on Mac OS 10.5</span>
<a name="l00357"></a>00357 xmlSaveDoc(saveContext, doc);
<a name="l00358"></a>00358 xmlSaveClose(saveContext);
<a name="l00359"></a>00359 [<span class="keyword">self</span> setRawResponseData:[NSMutableData dataWithContentsOfFile:tempPath]];
<a name="l00360"></a>00360 <span class="preprocessor"> #else</span>
<a name="l00361"></a>00361 <span class="preprocessor"></span> xmlBufferPtr buffer = xmlBufferCreate();
<a name="l00362"></a>00362 saveContext = xmlSaveToBuffer(buffer,NULL,2); <span class="comment">// 2 == XML_SAVE_NO_DECL, this isn't declared on Mac OS 10.5</span>
<a name="l00363"></a>00363 xmlSaveDoc(saveContext, doc);
<a name="l00364"></a>00364 xmlSaveClose(saveContext);
<a name="l00365"></a>00365 [<span class="keyword">self</span> setRawResponseData:[[[NSMutableData alloc] initWithBytes:buffer->content length:buffer->use] autorelease]];
<a name="l00366"></a>00366 xmlBufferFree(buffer);
<a name="l00367"></a>00367 <span class="preprocessor"> #endif</span>
<a name="l00368"></a>00368 <span class="preprocessor"></span> }
<a name="l00369"></a>00369
<a name="l00370"></a>00370 <span class="comment">// Strip the content encoding if the original response was gzipped</span>
<a name="l00371"></a>00371 <span class="keywordflow">if</span> ([<span class="keyword">self</span> isResponseCompressed]) {
<a name="l00372"></a>00372 NSMutableDictionary *headers = [[[<span class="keyword">self</span> responseHeaders] mutableCopy] autorelease];
<a name="l00373"></a>00373 [headers removeObjectForKey:@"Content-Encoding"];
<a name="l00374"></a>00374 [<span class="keyword">self</span> setResponseHeaders:headers];
<a name="l00375"></a>00375 }
<a name="l00376"></a>00376 }
<a name="l00377"></a>00377
<a name="l00378"></a>00378 xmlFreeDoc(doc);
<a name="l00379"></a>00379 doc = nil;
<a name="l00380"></a>00380
<a name="l00381"></a>00381 [requestsUsingXMLParser removeObject:self];
<a name="l00382"></a>00382 <span class="keywordflow">if</span> (![requestsUsingXMLParser count]) {
<a name="l00383"></a>00383 xmlCleanupParser();
<a name="l00384"></a>00384 }
<a name="l00385"></a>00385 [xmlParsingLock unlock];
<a name="l00386"></a>00386 }
<a name="l00387"></a>00387 }
<a name="l00388"></a>00388 <span class="keywordflow">if</span> (![<span class="keyword">self</span> parentRequest]) {
<a name="l00389"></a>00389 [[<span class="keyword">self</span> class] updateProgressIndicator:&downloadProgressDelegate withProgress:contentLength ofTotal:contentLength];
<a name="l00390"></a>00390 }
<a name="l00391"></a>00391
<a name="l00392"></a>00392 NSMutableDictionary *newHeaders = [[[<span class="keyword">self</span> responseHeaders] mutableCopy] autorelease];
<a name="l00393"></a>00393 [newHeaders removeObjectForKey:@"Content-Encoding"];
<a name="l00394"></a>00394 [<span class="keyword">self</span> setResponseHeaders:newHeaders];
<a name="l00395"></a>00395
<a name="l00396"></a>00396 <span class="comment">// Write the parsed content back to the cache</span>
<a name="l00397"></a>00397 <span class="keywordflow">if</span> ([<span class="keyword">self</span> urlReplacementMode] != ASIDontModifyURLs) {
<a name="l00398"></a>00398 [[<span class="keyword">self</span> downloadCache] storeResponseForRequest:self maxAge:[<span class="keyword">self</span> secondsToCache]];
<a name="l00399"></a>00399 }
<a name="l00400"></a>00400
<a name="l00401"></a>00401 [<span class="keyword">super</span> requestFinished];
<a name="l00402"></a>00402 [<span class="keyword">super</span> markAsFinished];
<a name="l00403"></a>00403 }
<a name="l00404"></a>00404
<a name="l00405"></a>00405 - (void)readResourceURLs
<a name="l00406"></a>00406 {
<a name="l00407"></a>00407 <span class="comment">// Create xpath evaluation context</span>
<a name="l00408"></a>00408 xmlXPathContextPtr xpathCtx = xmlXPathNewContext(doc);
<a name="l00409"></a>00409 <span class="keywordflow">if</span>(xpathCtx == NULL) {
<a name="l00410"></a>00410 [<span class="keyword">self</span> failWithError:[NSError errorWithDomain:NetworkRequestErrorDomain code:101 userInfo:[NSDictionary dictionaryWithObjectsAndKeys:@"Error: unable to create new XPath context",NSLocalizedDescriptionKey,nil]]];
<a name="l00411"></a>00411 <span class="keywordflow">return</span>;
<a name="l00412"></a>00412 }
<a name="l00413"></a>00413
<a name="l00414"></a>00414 <span class="comment">// Evaluate xpath expression</span>
<a name="l00415"></a>00415 xmlXPathObjectPtr xpathObj = xmlXPathEvalExpression(xpathExpr, xpathCtx);
<a name="l00416"></a>00416 <span class="keywordflow">if</span>(xpathObj == NULL) {
<a name="l00417"></a>00417 xmlXPathFreeContext(xpathCtx);
<a name="l00418"></a>00418 [<span class="keyword">self</span> failWithError:[NSError errorWithDomain:NetworkRequestErrorDomain code:101 userInfo:[NSDictionary dictionaryWithObjectsAndKeys:@"Error: unable to evaluate XPath expression!",NSLocalizedDescriptionKey,nil]]];
<a name="l00419"></a>00419 <span class="keywordflow">return</span>;
<a name="l00420"></a>00420 }
<a name="l00421"></a>00421
<a name="l00422"></a>00422 <span class="comment">// Now loop through our matches</span>
<a name="l00423"></a>00423 xmlNodeSetPtr nodes = xpathObj->nodesetval;
<a name="l00424"></a>00424
<a name="l00425"></a>00425 <span class="keywordtype">int</span> size = (nodes) ? nodes->nodeNr : 0;
<a name="l00426"></a>00426 <span class="keywordtype">int</span> i;
<a name="l00427"></a>00427 <span class="keywordflow">for</span>(i = size - 1; i >= 0; i--) {
<a name="l00428"></a>00428 assert(nodes->nodeTab[i]);
<a name="l00429"></a>00429 <a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *parentName = [<a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> stringWithCString:(char *)nodes->nodeTab[i]->parent->name encoding:[<span class="keyword">self</span> responseEncoding]];
<a name="l00430"></a>00430 <a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *nodeName = [<a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> stringWithCString:(char *)nodes->nodeTab[i]->name encoding:[<span class="keyword">self</span> responseEncoding]];
<a name="l00431"></a>00431
<a name="l00432"></a>00432 xmlChar *nodeValue = xmlNodeGetContent(nodes->nodeTab[i]);
<a name="l00433"></a>00433 <a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *value = [<a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> stringWithCString:(char *)nodeValue encoding:[<span class="keyword">self</span> responseEncoding]];
<a name="l00434"></a>00434 xmlFree(nodeValue);
<a name="l00435"></a>00435
<a name="l00436"></a>00436 <span class="comment">// Our xpath query matched all <link> elements, but we're only interested in stylesheets</span>
<a name="l00437"></a>00437 <span class="comment">// We do the work here rather than in the xPath query because the query is case-sensitive, and we want to match on 'stylesheet', 'StyleSHEEt' etc</span>
<a name="l00438"></a>00438 <span class="keywordflow">if</span> ([[parentName lowercaseString] isEqualToString:<span class="stringliteral">@"link"</span>]) {
<a name="l00439"></a>00439 xmlChar *relAttribute = xmlGetNoNsProp(nodes->nodeTab[i]->parent,(xmlChar *)<span class="stringliteral">"rel"</span>);
<a name="l00440"></a>00440 <span class="keywordflow">if</span> (relAttribute) {
<a name="l00441"></a>00441 <a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *rel = [<a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> stringWithCString:(char *)relAttribute encoding:[<span class="keyword">self</span> responseEncoding]];
<a name="l00442"></a>00442 xmlFree(relAttribute);
<a name="l00443"></a>00443 <span class="keywordflow">if</span> ([[rel lowercaseString] isEqualToString:<span class="stringliteral">@"stylesheet"</span>]) {
<a name="l00444"></a>00444 [<span class="keyword">self</span> addURLToFetch:value];
<a name="l00445"></a>00445 }
<a name="l00446"></a>00446 }
<a name="l00447"></a>00447
<a name="l00448"></a>00448 <span class="comment">// Parse the content of <style> tags and style attributes to find external image urls or external css files</span>
<a name="l00449"></a>00449 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> ([[nodeName lowercaseString] isEqualToString:<span class="stringliteral">@"style"</span>]) {
<a name="l00450"></a>00450 NSArray *externalResources = [[<span class="keyword">self</span> class] CSSURLsFromString:value];
<a name="l00451"></a>00451 <span class="keywordflow">for</span> (<a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *theURL in externalResources) {
<a name="l00452"></a>00452 [<span class="keyword">self</span> addURLToFetch:theURL];
<a name="l00453"></a>00453 }
<a name="l00454"></a>00454
<a name="l00455"></a>00455 <span class="comment">// Parse the content of <source src=""> tags (HTML 5 audio + video)</span>
<a name="l00456"></a>00456 <span class="comment">// We explictly disable the download of files with .webm, .ogv and .ogg extensions, since it's highly likely they won't be useful to us</span>
<a name="l00457"></a>00457 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> ([[parentName lowercaseString] isEqualToString:<span class="stringliteral">@"source"</span>] || [[parentName lowercaseString] isEqualToString:<span class="stringliteral">@"audio"</span>]) {
<a name="l00458"></a>00458 <a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *fileExtension = [[value pathExtension] lowercaseString];
<a name="l00459"></a>00459 <span class="keywordflow">if</span> (![fileExtension isEqualToString:<span class="stringliteral">@"ogg"</span>] && ![fileExtension isEqualToString:<span class="stringliteral">@"ogv"</span>] && ![fileExtension isEqualToString:<span class="stringliteral">@"webm"</span>]) {
<a name="l00460"></a>00460 [<span class="keyword">self</span> addURLToFetch:value];
<a name="l00461"></a>00461 }
<a name="l00462"></a>00462
<a name="l00463"></a>00463 <span class="comment">// For all other elements matched by our xpath query (except hyperlinks), add the content as an external url to fetch</span>
<a name="l00464"></a>00464 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (![[parentName lowercaseString] isEqualToString:<span class="stringliteral">@"a"</span>]) {
<a name="l00465"></a>00465 [<span class="keyword">self</span> addURLToFetch:value];
<a name="l00466"></a>00466 }
<a name="l00467"></a>00467 <span class="keywordflow">if</span> (nodes->nodeTab[i]->type != XML_NAMESPACE_DECL) {
<a name="l00468"></a>00468 nodes->nodeTab[i] = NULL;
<a name="l00469"></a>00469 }
<a name="l00470"></a>00470 }
<a name="l00471"></a>00471
<a name="l00472"></a>00472 xmlXPathFreeObject(xpathObj);
<a name="l00473"></a>00473 xmlXPathFreeContext(xpathCtx);
<a name="l00474"></a>00474 }
<a name="l00475"></a>00475
<a name="l00476"></a>00476 - (void)addURLToFetch:(<a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *)newURL
<a name="l00477"></a>00477 {
<a name="l00478"></a>00478 <span class="comment">// Get rid of any surrounding whitespace</span>
<a name="l00479"></a>00479 newURL = [newURL stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
<a name="l00480"></a>00480 <span class="comment">// Don't attempt to fetch data URIs</span>
<a name="l00481"></a>00481 <span class="keywordflow">if</span> ([newURL length] > 4) {
<a name="l00482"></a>00482 <span class="keywordflow">if</span> (![[[newURL substringToIndex:5] lowercaseString] isEqualToString:<span class="stringliteral">@"data:"</span>]) {
<a name="l00483"></a>00483 NSURL *theURL = [NSURL URLWithString:newURL relativeToURL:[<span class="keyword">self</span> url]];
<a name="l00484"></a>00484 <span class="keywordflow">if</span> (theURL) {
<a name="l00485"></a>00485 <span class="keywordflow">if</span> (![[<span class="keyword">self</span> resourceList] objectForKey:newURL]) {
<a name="l00486"></a>00486 [[<span class="keyword">self</span> resourceList] setObject:[NSMutableDictionary dictionary] forKey:newURL];
<a name="l00487"></a>00487 }
<a name="l00488"></a>00488 }
<a name="l00489"></a>00489 }
<a name="l00490"></a>00490 }
<a name="l00491"></a>00491 }
<a name="l00492"></a>00492
<a name="l00493"></a>00493
<a name="l00494"></a>00494 - (void)updateResourceURLs
<a name="l00495"></a>00495 {
<a name="l00496"></a>00496 <span class="comment">// Create xpath evaluation context</span>
<a name="l00497"></a>00497 xmlXPathContextPtr xpathCtx = xmlXPathNewContext(doc);
<a name="l00498"></a>00498 <span class="keywordflow">if</span>(xpathCtx == NULL) {
<a name="l00499"></a>00499 [<span class="keyword">self</span> failWithError:[NSError errorWithDomain:NetworkRequestErrorDomain code:101 userInfo:[NSDictionary dictionaryWithObjectsAndKeys:@"Error: unable to create new XPath context",NSLocalizedDescriptionKey,nil]]];
<a name="l00500"></a>00500 <span class="keywordflow">return</span>;
<a name="l00501"></a>00501 }
<a name="l00502"></a>00502
<a name="l00503"></a>00503 <span class="comment">// Evaluate xpath expression</span>
<a name="l00504"></a>00504 xmlXPathObjectPtr xpathObj = xmlXPathEvalExpression(xpathExpr, xpathCtx);
<a name="l00505"></a>00505 <span class="keywordflow">if</span>(xpathObj == NULL) {
<a name="l00506"></a>00506 xmlXPathFreeContext(xpathCtx);
<a name="l00507"></a>00507 [<span class="keyword">self</span> failWithError:[NSError errorWithDomain:NetworkRequestErrorDomain code:101 userInfo:[NSDictionary dictionaryWithObjectsAndKeys:@"Error: unable to evaluate XPath expression!",NSLocalizedDescriptionKey,nil]]];
<a name="l00508"></a>00508 <span class="keywordflow">return</span>;
<a name="l00509"></a>00509 }
<a name="l00510"></a>00510
<a name="l00511"></a>00511 <span class="comment">// Loop through all the matches, replacing urls where nescessary</span>
<a name="l00512"></a>00512 xmlNodeSetPtr nodes = xpathObj->nodesetval;
<a name="l00513"></a>00513 <span class="keywordtype">int</span> size = (nodes) ? nodes->nodeNr : 0;
<a name="l00514"></a>00514 <span class="keywordtype">int</span> i;
<a name="l00515"></a>00515 <span class="keywordflow">for</span>(i = size - 1; i >= 0; i--) {
<a name="l00516"></a>00516 assert(nodes->nodeTab[i]);
<a name="l00517"></a>00517 <a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *parentName = [<a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> stringWithCString:(char *)nodes->nodeTab[i]->parent->name encoding:[<span class="keyword">self</span> responseEncoding]];
<a name="l00518"></a>00518 <a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *nodeName = [<a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> stringWithCString:(char *)nodes->nodeTab[i]->name encoding:[<span class="keyword">self</span> responseEncoding]];
<a name="l00519"></a>00519
<a name="l00520"></a>00520 xmlChar *nodeValue = xmlNodeGetContent(nodes->nodeTab[i]);
<a name="l00521"></a>00521 <a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *value = [<a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> stringWithCString:(char *)nodeValue encoding:[<span class="keyword">self</span> responseEncoding]];
<a name="l00522"></a>00522 xmlFree(nodeValue);
<a name="l00523"></a>00523
<a name="l00524"></a>00524 <span class="comment">// Replace external urls in <style> tags or in style attributes</span>
<a name="l00525"></a>00525 <span class="keywordflow">if</span> ([[nodeName lowercaseString] isEqualToString:<span class="stringliteral">@"style"</span>]) {
<a name="l00526"></a>00526 NSArray *externalResources = [[<span class="keyword">self</span> class] CSSURLsFromString:value];
<a name="l00527"></a>00527 <span class="keywordflow">for</span> (<a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *theURL in externalResources) {
<a name="l00528"></a>00528 <span class="keywordflow">if</span> ([value rangeOfString:theURL].location != NSNotFound) {
<a name="l00529"></a>00529 <a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *newURL = [<span class="keyword">self</span> contentForExternalURL:theURL];
<a name="l00530"></a>00530 <span class="keywordflow">if</span> (newURL) {
<a name="l00531"></a>00531 value = [value stringByReplacingOccurrencesOfString:theURL withString:newURL];
<a name="l00532"></a>00532 }
<a name="l00533"></a>00533 }
<a name="l00534"></a>00534 }
<a name="l00535"></a>00535 xmlNodeSetContent(nodes->nodeTab[i], (xmlChar *)[value cStringUsingEncoding:[<span class="keyword">self</span> responseEncoding]]);
<a name="l00536"></a>00536
<a name="l00537"></a>00537 <span class="comment">// Replace relative hyperlinks with absolute ones, since we will need to set a local baseURL when loading this in a web view</span>
<a name="l00538"></a>00538 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> ([<span class="keyword">self</span> urlReplacementMode] == ASIReplaceExternalResourcesWithLocalURLs && [[parentName lowercaseString] isEqualToString:<span class="stringliteral">@"a"</span>]) {
<a name="l00539"></a>00539 <a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *newURL = [[NSURL URLWithString:value relativeToURL:[<span class="keyword">self</span> url]] absoluteString];
<a name="l00540"></a>00540 <span class="keywordflow">if</span> (newURL) {
<a name="l00541"></a>00541 xmlNodeSetContent(nodes->nodeTab[i], (xmlChar *)[newURL cStringUsingEncoding:[<span class="keyword">self</span> responseEncoding]]);
<a name="l00542"></a>00542 }
<a name="l00543"></a>00543
<a name="l00544"></a>00544 <span class="comment">// Replace all other external resource urls</span>
<a name="l00545"></a>00545 } <span class="keywordflow">else</span> {
<a name="l00546"></a>00546 <a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *newURL = [<span class="keyword">self</span> contentForExternalURL:value];
<a name="l00547"></a>00547 <span class="keywordflow">if</span> (newURL) {
<a name="l00548"></a>00548 xmlNodeSetContent(nodes->nodeTab[i], (xmlChar *)[newURL cStringUsingEncoding:[<span class="keyword">self</span> responseEncoding]]);
<a name="l00549"></a>00549 }
<a name="l00550"></a>00550 }
<a name="l00551"></a>00551
<a name="l00552"></a>00552 <span class="keywordflow">if</span> (nodes->nodeTab[i]->type != XML_NAMESPACE_DECL) {
<a name="l00553"></a>00553 nodes->nodeTab[i] = NULL;
<a name="l00554"></a>00554 }
<a name="l00555"></a>00555 }
<a name="l00556"></a>00556 xmlXPathFreeObject(xpathObj);
<a name="l00557"></a>00557 xmlXPathFreeContext(xpathCtx);
<a name="l00558"></a>00558 }
<a name="l00559"></a>00559
<a name="l00560"></a>00560 <span class="comment">// The three methods below are responsible for forwarding delegate methods we want to handle to the parent request's approdiate delegate</span>
<a name="l00561"></a>00561 <span class="comment">// Certain delegate methods are ignored (eg setProgress: / setDoubleValue: / setMaxValue:)</span>
<a name="l00562"></a>00562 - (BOOL)respondsToSelector:(<span class="keywordtype">SEL</span>)selector
<a name="l00563"></a>00563 {
<a name="l00564"></a>00564 <span class="keywordflow">if</span> ([<span class="keyword">self</span> parentRequest]) {
<a name="l00565"></a>00565 <span class="keywordflow">return</span> [[<span class="keyword">self</span> parentRequest] respondsToSelector:selector];
<a name="l00566"></a>00566 }
<a name="l00567"></a>00567 <span class="comment">//Ok, now check for selectors we want to pass on to the delegate</span>
<a name="l00568"></a>00568 <span class="keywordflow">if</span> (selector == <span class="keyword">@selector</span>(requestStarted:) || selector == <span class="keyword">@selector</span>(request:didReceiveResponseHeaders:) || selector == <span class="keyword">@selector</span>(request:willRedirectToURL:) || selector == <span class="keyword">@selector</span>(requestFinished:) || selector == <span class="keyword">@selector</span>(requestFailed:) || selector == <span class="keyword">@selector</span>(request:didReceiveData:) || selector == <span class="keyword">@selector</span>(authenticationNeededForRequest:) || selector == <span class="keyword">@selector</span>(proxyAuthenticationNeededForRequest:)) {
<a name="l00569"></a>00569 <span class="keywordflow">return</span> [delegate respondsToSelector:selector];
<a name="l00570"></a>00570 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (selector == <span class="keyword">@selector</span>(request:didReceiveBytes:) || selector == <span class="keyword">@selector</span>(request:incrementDownloadSizeBy:)) {
<a name="l00571"></a>00571 <span class="keywordflow">return</span> [downloadProgressDelegate respondsToSelector:selector];
<a name="l00572"></a>00572 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (selector == <span class="keyword">@selector</span>(request:didSendBytes:) || selector == <span class="keyword">@selector</span>(request:incrementUploadSizeBy:)) {
<a name="l00573"></a>00573 <span class="keywordflow">return</span> [uploadProgressDelegate respondsToSelector:selector];
<a name="l00574"></a>00574 }
<a name="l00575"></a>00575 <span class="keywordflow">return</span> [<span class="keyword">super</span> respondsToSelector:selector];
<a name="l00576"></a>00576 }
<a name="l00577"></a>00577
<a name="l00578"></a>00578 - (NSMethodSignature *)methodSignatureForSelector:(<span class="keywordtype">SEL</span>)selector
<a name="l00579"></a>00579 {
<a name="l00580"></a>00580 <span class="keywordflow">if</span> ([<span class="keyword">self</span> parentRequest]) {
<a name="l00581"></a>00581 <span class="keywordflow">return</span> [[<span class="keyword">self</span> parentRequest] methodSignatureForSelector:selector];
<a name="l00582"></a>00582 }
<a name="l00583"></a>00583 <span class="keywordflow">if</span> (selector == <span class="keyword">@selector</span>(requestStarted:) || selector == <span class="keyword">@selector</span>(request:didReceiveResponseHeaders:) || selector == <span class="keyword">@selector</span>(request:willRedirectToURL:) || selector == <span class="keyword">@selector</span>(requestFinished:) || selector == <span class="keyword">@selector</span>(requestFailed:) || selector == <span class="keyword">@selector</span>(request:didReceiveData:) || selector == <span class="keyword">@selector</span>(authenticationNeededForRequest:) || selector == <span class="keyword">@selector</span>(proxyAuthenticationNeededForRequest:)) {
<a name="l00584"></a>00584 <span class="keywordflow">return</span> [(id)delegate methodSignatureForSelector:selector];
<a name="l00585"></a>00585 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (selector == <span class="keyword">@selector</span>(request:didReceiveBytes:) || selector == <span class="keyword">@selector</span>(request:incrementDownloadSizeBy:)) {
<a name="l00586"></a>00586 <span class="keywordflow">return</span> [(id)downloadProgressDelegate methodSignatureForSelector:selector];
<a name="l00587"></a>00587 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (selector == <span class="keyword">@selector</span>(request:didSendBytes:) || selector == <span class="keyword">@selector</span>(request:incrementUploadSizeBy:)) {
<a name="l00588"></a>00588 <span class="keywordflow">return</span> [(id)uploadProgressDelegate methodSignatureForSelector:selector];
<a name="l00589"></a>00589 }
<a name="l00590"></a>00590 <span class="keywordflow">return</span> nil;
<a name="l00591"></a>00591 }
<a name="l00592"></a>00592
<a name="l00593"></a>00593 - (void)forwardInvocation:(NSInvocation *)anInvocation
<a name="l00594"></a>00594 {
<a name="l00595"></a>00595 <span class="keywordflow">if</span> ([<span class="keyword">self</span> parentRequest]) {
<a name="l00596"></a>00596 <span class="keywordflow">return</span> [[<span class="keyword">self</span> parentRequest] forwardInvocation:anInvocation];
<a name="l00597"></a>00597 }
<a name="l00598"></a>00598 <span class="keywordtype">SEL</span> selector = [anInvocation selector];
<a name="l00599"></a>00599 <span class="keywordflow">if</span> (selector == <span class="keyword">@selector</span>(requestStarted:) || selector == <span class="keyword">@selector</span>(request:didReceiveResponseHeaders:) || selector == <span class="keyword">@selector</span>(request:willRedirectToURL:) || selector == <span class="keyword">@selector</span>(requestFinished:) || selector == <span class="keyword">@selector</span>(requestFailed:) || selector == <span class="keyword">@selector</span>(request:didReceiveData:) || selector == <span class="keyword">@selector</span>(authenticationNeededForRequest:) || selector == <span class="keyword">@selector</span>(proxyAuthenticationNeededForRequest:)) {
<a name="l00600"></a>00600 [anInvocation invokeWithTarget:delegate];
<a name="l00601"></a>00601 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (selector == <span class="keyword">@selector</span>(request:didReceiveBytes:) || selector == <span class="keyword">@selector</span>(request:incrementDownloadSizeBy:)) {
<a name="l00602"></a>00602 [anInvocation invokeWithTarget:downloadProgressDelegate];
<a name="l00603"></a>00603 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (selector == <span class="keyword">@selector</span>(request:didSendBytes:) || selector == <span class="keyword">@selector</span>(request:incrementUploadSizeBy:)) {
<a name="l00604"></a>00604 [anInvocation invokeWithTarget:uploadProgressDelegate];
<a name="l00605"></a>00605 }
<a name="l00606"></a>00606 }
<a name="l00607"></a>00607
<a name="l00608"></a>00608 <span class="comment">// A quick and dirty way to build a list of external resource urls from a css string</span>
<a name="l00609"></a>00609 + (NSArray *)CSSURLsFromString:(<a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *)string
<a name="l00610"></a>00610 {
<a name="l00611"></a>00611 NSMutableArray *urls = [NSMutableArray array];
<a name="l00612"></a>00612 NSScanner *scanner = [NSScanner scannerWithString:string];
<a name="l00613"></a>00613 [scanner setCaseSensitive:NO];
<a name="l00614"></a>00614 <span class="keywordflow">while</span> (1) {
<a name="l00615"></a>00615 <a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *theURL = nil;
<a name="l00616"></a>00616 [scanner scanUpToString:@"url(" intoString:NULL];
<a name="l00617"></a>00617 [scanner scanString:@"url(" intoString:NULL];
<a name="l00618"></a>00618 [scanner scanUpToString:@")" intoString:&theURL];
<a name="l00619"></a>00619 <span class="keywordflow">if</span> (!theURL) {
<a name="l00620"></a>00620 <span class="keywordflow">break</span>;
<a name="l00621"></a>00621 }
<a name="l00622"></a>00622 <span class="comment">// Remove any quotes or whitespace around the url</span>
<a name="l00623"></a>00623 theURL = [theURL stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
<a name="l00624"></a>00624 theURL = [theURL stringByTrimmingCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:@"\"'"]];
<a name="l00625"></a>00625 theURL = [theURL stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
<a name="l00626"></a>00626 [urls addObject:theURL];
<a name="l00627"></a>00627 }
<a name="l00628"></a>00628 <span class="keywordflow">return</span> urls;
<a name="l00629"></a>00629 }
<a name="l00630"></a>00630
<a name="l00631"></a>00631 <span class="comment">// Returns a relative file path from sourcePath to destinationPath (eg ../../foo/bar.txt)</span>
<a name="l00632"></a>00632 - (<a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *)relativePathTo:(<a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *)destinationPath fromPath:(<a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *)sourcePath
<a name="l00633"></a>00633 {
<a name="l00634"></a>00634 NSArray *sourcePathComponents = [sourcePath pathComponents];
<a name="l00635"></a>00635 NSArray *destinationPathComponents = [destinationPath pathComponents];
<a name="l00636"></a>00636 NSUInteger i;
<a name="l00637"></a>00637 <a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *newPath = <span class="stringliteral">@""</span>;
<a name="l00638"></a>00638 <a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *sourcePathComponent, *destinationPathComponent;
<a name="l00639"></a>00639 <span class="keywordflow">for</span> (i=0; i<[sourcePathComponents count]; i++) {
<a name="l00640"></a>00640 sourcePathComponent = [sourcePathComponents objectAtIndex:i];
<a name="l00641"></a>00641 <span class="keywordflow">if</span> ([destinationPathComponents count] > i) {
<a name="l00642"></a>00642 destinationPathComponent = [destinationPathComponents objectAtIndex:i];
<a name="l00643"></a>00643 <span class="keywordflow">if</span> (![sourcePathComponent isEqualToString:destinationPathComponent]) {
<a name="l00644"></a>00644 NSUInteger i2;
<a name="l00645"></a>00645 <span class="keywordflow">for</span> (i2=i+1; i2<[sourcePathComponents count]; i2++) {
<a name="l00646"></a>00646 newPath = [newPath stringByAppendingPathComponent:@".."];
<a name="l00647"></a>00647 }
<a name="l00648"></a>00648 newPath = [newPath stringByAppendingPathComponent:destinationPathComponent];
<a name="l00649"></a>00649 <span class="keywordflow">for</span> (i2=i+1; i2<[destinationPathComponents count]; i2++) {
<a name="l00650"></a>00650 newPath = [newPath stringByAppendingPathComponent:[destinationPathComponents objectAtIndex:i2]];
<a name="l00651"></a>00651 }
<a name="l00652"></a>00652 <span class="keywordflow">break</span>;
<a name="l00653"></a>00653 }
<a name="l00654"></a>00654 }
<a name="l00655"></a>00655 }
<a name="l00656"></a>00656 <span class="keywordflow">return</span> newPath;
<a name="l00657"></a>00657 }
<a name="l00658"></a>00658
<a name="l00659"></a>00659 - (<a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *)contentForExternalURL:(<a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *)theURL
<a name="l00660"></a>00660 {
<a name="l00661"></a>00661 <span class="keywordflow">if</span> ([<span class="keyword">self</span> urlReplacementMode] == ASIReplaceExternalResourcesWithLocalURLs) {
<a name="l00662"></a>00662 <a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *resourcePath = [[resourceList objectForKey:theURL] objectForKey:@"DataPath"];
<a name="l00663"></a>00663 <span class="keywordflow">return</span> [<span class="keyword">self</span> relativePathTo:resourcePath fromPath:[<span class="keyword">self</span> downloadDestinationPath]];
<a name="l00664"></a>00664 }
<a name="l00665"></a>00665 <a class="code" href="class_n_s_data.html" title="For hashing raw data.">NSData</a> *data;
<a name="l00666"></a>00666 <span class="keywordflow">if</span> ([[resourceList objectForKey:theURL] objectForKey:<span class="stringliteral">@"DataPath"</span>]) {
<a name="l00667"></a>00667 data = [<a class="code" href="class_n_s_data.html" title="For hashing raw data.">NSData</a> dataWithContentsOfFile:[[resourceList objectForKey:theURL] objectForKey:@"DataPath"]];
<a name="l00668"></a>00668 } <span class="keywordflow">else</span> {
<a name="l00669"></a>00669 data = [[resourceList objectForKey:theURL] objectForKey:@"Data"];
<a name="l00670"></a>00670 }
<a name="l00671"></a>00671 <a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *contentType = [[resourceList objectForKey:theURL] objectForKey:@"ContentType"];
<a name="l00672"></a>00672 <span class="keywordflow">if</span> (data && contentType) {
<a name="l00673"></a>00673 <a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *dataURI = [<a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> stringWithFormat:@"data:%@;base64,",contentType];
<a name="l00674"></a>00674 dataURI = [dataURI stringByAppendingString:[ASIHTTPRequest base64forData:data]];
<a name="l00675"></a>00675 <span class="keywordflow">return</span> dataURI;
<a name="l00676"></a>00676 }
<a name="l00677"></a>00677 <span class="keywordflow">return</span> nil;
<a name="l00678"></a>00678 }
<a name="l00679"></a>00679
<a name="l00680"></a>00680 - (<a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *)cachePathForRequest:(ASIWebPageRequest *)theRequest
<a name="l00681"></a>00681 {
<a name="l00682"></a>00682 <span class="comment">// If we're using a download cache (and its a good idea to do so when using ASIWebPageRequest), ask it for the location to store this file</span>
<a name="l00683"></a>00683 <span class="comment">// This ends up being quite efficient, as we download directly to the cache</span>
<a name="l00684"></a>00684 <span class="keywordflow">if</span> ([<span class="keyword">self</span> downloadCache]) {
<a name="l00685"></a>00685 <span class="keywordflow">return</span> [[<span class="keyword">self</span> downloadCache] pathToStoreCachedResponseDataForRequest:theRequest];
<a name="l00686"></a>00686
<a name="l00687"></a>00687 <span class="comment">// This is a fallback for when we don't have a download cache - we store the external resource in a file in the temporary directory</span>
<a name="l00688"></a>00688 } <span class="keywordflow">else</span> {
<a name="l00689"></a>00689 <span class="comment">// Borrowed from: http://stackoverflow.com/questions/652300/using-md5-hash-on-a-string-in-cocoa</span>
<a name="l00690"></a>00690 <span class="keyword">const</span> <span class="keywordtype">char</span> *cStr = [[[theRequest url] absoluteString] UTF8String];
<a name="l00691"></a>00691 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> result[16];
<a name="l00692"></a>00692 CC_MD5(cStr, (CC_LONG)strlen(cStr), result);
<a name="l00693"></a>00693 <a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *md5 = [<a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> stringWithFormat:@"%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X",result[0], result[1], result[2], result[3], result[4], result[5], result[6], result[7],result[8], result[9], result[10], result[11],result[12], result[13], result[14], result[15]];
<a name="l00694"></a>00694 <span class="keywordflow">return</span> [[NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) objectAtIndex:0] stringByAppendingPathComponent:[md5 stringByAppendingPathExtension:@"html"]];
<a name="l00695"></a>00695 }
<a name="l00696"></a>00696 }
<a name="l00697"></a>00697
<a name="l00698"></a>00698
<a name="l00699"></a>00699 <span class="keyword">@synthesize</span> externalResourceQueue;
<a name="l00700"></a>00700 <span class="keyword">@synthesize</span> resourceList;
<a name="l00701"></a>00701 <span class="keyword">@synthesize</span> parentRequest;
<a name="l00702"></a>00702 <span class="keyword">@synthesize</span> urlReplacementMode;
<a name="l00703"></a>00703 <span class="keyword">@end</span>
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