preliminary commit of data: support

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@36105 72102866-910b-0410-8b05-ffd578937521

Source/NSURLProtocol.m

@@ -283,6 +283,8 @@ static NSLock		*pairLock = nil;
 @interface _NSHTTPSURLProtocol : _NSHTTPURLProtocol
 @end
 
+@interface _NSDataURLProtocol : NSURLProtocol
+@end
 
 
 // Internal data storage
@@ -371,6 +373,7 @@ static NSURLProtocol	*placeholder = nil;
       [self registerClass: [_NSFTPURLProtocol class]];
       [self registerClass: [_NSFileURLProtocol class]];
       [self registerClass: [_NSAboutURLProtocol class]];
+      [self registerClass: [_NSDataURLProtocol class]];
     }
 }
 
@@ -1827,6 +1830,93 @@ static NSURLProtocol	*placeholder = nil;
 
 @end
 
+@implementation _NSDataURLProtocol
+
++ (BOOL) canInitWithRequest: (NSURLRequest*)request
+{
+  return [[[request URL] scheme] isEqualToString: @"data"];
+}
+
++ (NSURLRequest*) canonicalRequestForRequest: (NSURLRequest*)request
+{
+  return request;
+}
+
+- (void) startLoading
+{
+  NSURLResponse *r;
+  NSString      *mime = @"text/plain";
+  NSString      *encoding = @"US-ASCII";
+  NSData        *data;
+  NSString      *spec = [[this->request URL] resourceSpecifier];
+  NSRange       comma = [spec rangeOfString:@","];
+  NSEnumerator  *types;
+  NSString      *type;
+  BOOL          base64 = NO;
+
+  if (comma.location == NSNotFound)
+    {
+      NSDictionary      *ui;
+      NSError           *error;
+
+      ui = [NSDictionary dictionaryWithObjectsAndKeys:
+        [this->request URL], @"URL",
+        [[this->request URL] path], @"path",
+        nil];
+      error = [NSError errorWithDomain: @"can't load data"
+                                  code: 0
+                              userInfo: ui];
+      [this->client URLProtocol: self didFailWithError: error];
+      return;
+    }
+  types = [[[spec substringToIndex: comma.location]
+    componentsSeparatedByString: @";"] objectEnumerator];
+  while (nil != (type = [types nextObject]))
+    {
+      if ([type isEqualToString: @"base64"])
+	{
+	  base64 = YES;
+	}
+      else if ([type hasPrefix: @"charset="])
+	{
+	  encoding = [type substringFromIndex: 8];
+	}
+      else if ([type length] > 0)
+	{
+	  mime = type;
+	}
+    }
+  spec = [spec substringFromIndex: comma.location + 1];
+  if (YES == base64)
+    {
+      data = [GSMimeDocument decodeBase64:
+        [spec dataUsingEncoding: NSUTF8StringEncoding]];
+    }
+  else
+    {
+      data = [[spec stringByReplacingPercentEscapesUsingEncoding:
+        NSUTF8StringEncoding] dataUsingEncoding: NSUTF8StringEncoding];
+    }
+  r = [[NSURLResponse alloc] initWithURL: [this->request URL]
+    MIMEType: mime
+    expectedContentLength: [data length]
+    textEncodingName: encoding];
+
+  [this->client URLProtocol: self
+         didReceiveResponse: r 
+	 cacheStoragePolicy: NSURLRequestUseProtocolCachePolicy];
+  [this->client URLProtocol: self didLoadData: data];
+  [this->client URLProtocolDidFinishLoading: self];
+  RELEASE(r);
+}
+
+- (void) stopLoading
+{
+  return;
+}
+
+@end
+
 @implementation _NSAboutURLProtocol
 
 + (BOOL) canInitWithRequest: (NSURLRequest*)request