Index: src/OFIRI.h
==================================================================
--- src/OFIRI.h
+++ src/OFIRI.h
@@ -159,10 +159,15 @@
 /**
  * @brief The IRI with relative subpaths resolved.
  */
 @property (readonly, nonatomic) OFIRI *IRIByStandardizingPath;
 
+/**
+ * @brief The IRI with the last path component deleted.
+ */
+@property (readonly, nonatomic) OFIRI *IRIByDeletingLastPathComponent;
+
 /**
  * @brief The IRI with percent-encoding added for all Unicode characters.
  */
 @property (readonly, nonatomic)
     OFIRI *IRIByAddingPercentEncodingForUnicodeCharacters;

Index: src/OFIRI.m
==================================================================
--- src/OFIRI.m
+++ src/OFIRI.m
@@ -1310,10 +1310,18 @@
 	OFMutableIRI *IRI = [[self mutableCopy] autorelease];
 	[IRI appendPathComponent: component isDirectory: isDirectory];
 	[IRI makeImmutable];
 	return IRI;
 }
+
+- (OFIRI *)IRIByDeletingLastPathComponent
+{
+	OFMutableIRI *IRI = [[self mutableCopy] autorelease];
+	[IRI deleteLastPathComponent];
+	[IRI makeImmutable];
+	return IRI;
+}
 
 - (OFIRI *)IRIByStandardizingPath
 {
 	OFMutableIRI *IRI = [[self mutableCopy] autorelease];
 	[IRI standardizePath];

Index: src/OFMutableIRI.h
==================================================================
--- src/OFMutableIRI.h
+++ src/OFMutableIRI.h
@@ -206,10 +206,15 @@
  *		      appended if there is no slash yet
  */
 - (void)appendPathComponent: (OFString *)component
 		isDirectory: (bool)isDirectory;
 
+/**
+ * @brief Deletes the last path component.
+ */
+- (void)deleteLastPathComponent;
+
 /**
  * @brief Resolves relative subpaths.
  */
 - (void)standardizePath;
 

Index: src/OFMutableIRI.m
==================================================================
--- src/OFMutableIRI.m
+++ src/OFMutableIRI.m
@@ -372,10 +372,38 @@
 		path = [path stringByAppendingString: @"/"];
 
 	[_percentEncodedPath release];
 	_percentEncodedPath = [path retain];
 
+	objc_autoreleasePoolPop(pool);
+}
+
+- (void)deleteLastPathComponent
+{
+	void *pool = objc_autoreleasePoolPush();
+	OFString *path = _percentEncodedPath;
+	size_t pos;
+
+	if (path.length == 0 || [path isEqual: @"/"]) {
+		objc_autoreleasePoolPop(pool);
+		return;
+	}
+
+	if ([path hasSuffix: @"/"])
+		 path = [path substringToIndex: path.length - 1];
+
+	pos = [path rangeOfString: @"/"
+			  options: OFStringSearchBackwards].location;
+	if (pos == OFNotFound) {
+		objc_autoreleasePoolPop(pool);
+		return;
+	}
+
+	path = [path substringToIndex: pos + 1];
+	[_percentEncodedPath release];
+	_percentEncodedPath = [path retain];
+
 	objc_autoreleasePoolPop(pool);
 }
 
 - (void)standardizePath
 {

Index: tests/OFIRITests.m
==================================================================
--- tests/OFIRITests.m
+++ tests/OFIRITests.m
@@ -355,10 +355,33 @@
 	    [[[OFIRI IRIWithString: @"http://host/path/component/"]
 	    IRIByAppendingPathComponent: @"foo/bar"
 			    isDirectory: true] path],
 	    @"/path/component/foo/bar/");
 }
+
+- (void)testIRIByDeletingLastPathComponent
+{
+	OTAssertEqualObjects(
+	    [[[OFIRI IRIWithString: @"http://host/path/component"]
+	    IRIByDeletingLastPathComponent] path], @"/path/");
+
+	OTAssertEqualObjects(
+	    [[[OFIRI IRIWithString: @"http://host/path/directory/"]
+	    IRIByDeletingLastPathComponent] path], @"/path/");
+
+	OTAssertEqualObjects(
+	    [[[OFIRI IRIWithString: @"http://host/path"]
+	    IRIByDeletingLastPathComponent] path], @"/");
+
+	OTAssertEqualObjects(
+	    [[[OFIRI IRIWithString: @"http://host/"]
+	    IRIByDeletingLastPathComponent] path], @"/");
+
+	OTAssertEqualObjects(
+	    [[[OFIRI IRIWithString: @"http://host"]
+	    IRIByDeletingLastPathComponent] path], @"");
+}
 
 - (void)testIRIByAddingPercentEncodingForUnicodeCharacters
 {
 	OTAssertEqualObjects(
 	    _IRI[10].IRIByAddingPercentEncodingForUnicodeCharacters,