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Introduce robust URL to java.nio.file.Path conversion #691

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Introduce robust URL to java.nio.file.Path conversion #691

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76 changes: 46 additions & 30 deletions ...es/org.eclipse.equinox.common.tests/src/org/eclipse/equinox/common/tests/URIUtilTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -19,13 +19,15 @@
import static org.junit.Assert.assertThrows;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import static org.junit.Assume.assumeTrue;

import java.io.File;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.nio.file.Path;

import org.eclipse.core.runtime.FileLocator;
import org.eclipse.core.runtime.IPath;
Expand Down Expand Up @@ -97,9 +99,7 @@ public void testToFile() {
*/
@Test
public void testToFileUNC() throws URISyntaxException {
if (!WINDOWS) {
return;
}
assumeTrue(WINDOWS);
// UNC paths
URI path = new URI("file://HOST/some/path");
File result = URIUtil.toFile(path);
Expand Down Expand Up @@ -187,6 +187,38 @@ public void testURLtoURI() throws MalformedURLException, URISyntaxException {
assertEquals("3.2", new URI("file:////SERVER/some/path"), URIUtil.toURI(new URL("file:////SERVER/some/path")));
}

@Test
public void testURLtoPath() throws MalformedURLException {

assertThrows(IllegalArgumentException.class, () -> URIUtil.toFilePath(new URL("http://foo.bar")));

assertEquals(Path.of("C:/foo/bar.txt"), URIUtil.toFilePath(new URL("file:/C:/foo/bar.txt")));
assertEquals(Path.of("C:/foo/bar.txt"), URIUtil.toFilePath(new URL("file:///C:/foo/bar.txt")));

// Not escaped special characters like spaces, % or #
assertEquals(Path.of("C:/foo/a b.txt"), URIUtil.toFilePath(new URL("file:/C:/foo/a b.txt")));
assertEquals(Path.of("C:/foo/a#b c.txt"), URIUtil.toFilePath(new URL("file:/C:/foo/a#b c.txt")));
assertEquals(Path.of("C:/foo/a%b.txt"), URIUtil.toFilePath(new URL("file:/C:/foo/a%b.txt")));
assertEquals(Path.of("C:/foo/bar#my-query"), URIUtil.toFilePath(new URL("file:/C:/foo/bar#my-query")));

// UNC paths (with not escaped spaces and %)
assertEquals(Path.of("////SERVER/some/path"), URIUtil.toFilePath(new URL("file://SERVER/some/path")));
assertEquals(Path.of("////SERVER/some/path"), URIUtil.toFilePath(new URL("file:////SERVER/some/path")));
assertEquals(Path.of("////SERVER/a b/path"), URIUtil.toFilePath(new URL("file://SERVER/a b/path")));
assertEquals(Path.of("////SERVER/a#b c/path"), URIUtil.toFilePath(new URL("file:////SERVER/a#b c/path")));
assertEquals(Path.of("////SERVER/some/a%b.txt"), URIUtil.toFilePath(new URL("file://SERVER/some/a%b.txt")));
assertEquals(Path.of("////SERVER/some/a%b.txt"), URIUtil.toFilePath(new URL("file:////SERVER/some/a%b.txt")));


// TODO: split the following? Make this a Windows only test case and create a
// separate UNIX test-case?
assumeTrue(WINDOWS);
assertEquals(Path.of("C:/foo/bar.txt"), URIUtil.toFilePath(new URL("file:c:/foo/bar.txt")));
assertEquals(Path.of("C:/foo/bar.txt"), URIUtil.toFilePath(new URL("file:/c:/foo/bar.txt")));

assertEquals(Path.of("foo/bar.txt"), URIUtil.toFilePath(new URL("file:foo/bar.txt")));
}

/**
* Tests for {@link URIUtil#toURL(java.net.URI)}.
*/
Expand All @@ -210,9 +242,7 @@ public void testURItoURL() throws MalformedURLException, URISyntaxException {
*/
@Test
public void testWindowsPathsFromURI() throws MalformedURLException, URISyntaxException {
if (!WINDOWS) {
return;
}
assumeTrue(WINDOWS);
assertEquals("1.1", new URI("file:/c:/foo/bar.txt"), URIUtil.toURI(new URL("file:c:/foo/bar.txt")));
assertEquals("1.2", new URI("file:/c:/foo/bar.txt"), URIUtil.toURI(new URL("file:/c:/foo/bar.txt")));
}
Expand All @@ -223,9 +253,7 @@ public void testWindowsPathsFromURI() throws MalformedURLException, URISyntaxExc
*/
@Test
public void testWindowsPathsFromString() throws URISyntaxException {
if (!WINDOWS) {
return;
}
assumeTrue(WINDOWS);
assertEquals("1.1", new URI("file:/c:/foo/bar.txt"), URIUtil.fromString("file:c:/foo/bar.txt"));
assertEquals("1.2", new URI("file:/c:/foo/bar.txt"), URIUtil.fromString("file:/c:/foo/bar.txt"));
}
Expand All @@ -239,22 +267,13 @@ public void testFileWithSpaces() throws MalformedURLException, URISyntaxExceptio
File fileWithSpaces = new File("/c:/with spaces/goo");
URI correctURI = fileWithSpaces.toURI();
URL fileURL = fileWithSpaces.toURL();
URI fileURI = null;
try {
fileURI = fileURL.toURI();
fail();
} catch (URISyntaxException e) {
fileURI = URIUtil.toURI(fileURL);
}
assertEquals("1.1", correctURI, fileURI);

try {
fileURI = new URI(fileURL.toString());
fail();
} catch (URISyntaxException e) {
fileURI = URIUtil.fromString(fileURL.toString());
}
assertEquals("1.2", correctURI, fileURI);
assertThrows(URISyntaxException.class, () -> fileURL.toURI());
assertEquals("1.1", correctURI, URIUtil.toURI(fileURL));

String fileURLString = fileURL.toString();
assertThrows(URISyntaxException.class, () -> new URI(fileURLString));
assertEquals("1.2", correctURI, URIUtil.fromString(fileURLString));
}

/**
Expand Down Expand Up @@ -365,9 +384,8 @@ public void testBug286339() throws URISyntaxException {

@Test
public void testAppendWindows() throws URISyntaxException {
if (!WINDOWS) {
return;
}
assumeTrue(WINDOWS);

URI base = new URI("file:/C:/a%20b");
URI result = URIUtil.append(base, "file.txt");
assertEquals("1.0", "file:/C:/a%20b/file.txt", result.toString());
Expand Down Expand Up @@ -440,9 +458,7 @@ public void testSameURI() throws URISyntaxException {

@Test
public void testSameURIWindows() throws URISyntaxException {
if (!WINDOWS) {
return;
}
assumeTrue(WINDOWS);
// device and case variants
assertTrue("1.0", URIUtil.sameURI(new URI("file:C:/a"), new URI("file:c:/a")));
assertTrue("1.1", URIUtil.sameURI(new URI("file:/C:/a"), new URI("file:/c:/a")));
Expand Down
2 changes: 1 addition & 1 deletion bundles/org.eclipse.equinox.common/META-INF/MANIFEST.MF
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Expand Up @@ -2,7 +2,7 @@ Manifest-Version: 1.0
Bundle-ManifestVersion: 2
Bundle-Name: %pluginName
Bundle-SymbolicName: org.eclipse.equinox.common; singleton:=true
Bundle-Version: 3.19.200.qualifier
Bundle-Version: 3.20.0.qualifier
Bundle-Localization: plugin
Export-Package: org.eclipse.core.internal.boot;x-friends:="org.eclipse.core.resources,org.eclipse.pde.build",
org.eclipse.core.internal.runtime;common=split;mandatory:=common;
Expand Down
9 changes: 4 additions & 5 deletions bundles/org.eclipse.equinox.common/src/org/eclipse/core/internal/runtime/DataArea.java
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Original file line number Diff line number Diff line change
Expand Up @@ -65,12 +65,11 @@ protected synchronized void assertLocationInitialized() throws IllegalStateExcep
// This will try to init url either from the specified location value or from
// service default
URL url = service.getURL();
if (url == null)
if (url == null) {
throw new IllegalStateException(CommonMessages.meta_instanceDataUnspecified);
// TODO assume the URL is a file:
// Use the new File technique to ensure that the resultant string is
// in the right format (e.g., leading / removed from /c:/foo etc)
location = IPath.fromOSString(new File(url.getFile()).toString());
}
// Assume the URL is a file:
location = IPath.fromPath(URIUtil.toFilePath(url));
initializeLocation();
} catch (CoreException e) {
throw new IllegalStateException(e.getMessage());
Expand Down
22 changes: 11 additions & 11 deletions ...pse.equinox.common/src/org/eclipse/core/internal/runtime/PlatformURLConfigConnection.java
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Original file line number Diff line number Diff line change
Expand Up @@ -16,8 +16,10 @@
import java.io.*;
import java.net.URL;
import java.net.UnknownServiceException;
import java.nio.file.Files;
import org.eclipse.core.internal.boot.PlatformURLConnection;
import org.eclipse.core.internal.boot.PlatformURLHandler;
import org.eclipse.core.runtime.URIUtil;
import org.eclipse.osgi.service.datalocation.Location;
import org.eclipse.osgi.util.NLS;

Expand Down Expand Up @@ -51,23 +53,21 @@ protected URL resolve() throws IOException {
Location parentConfig = localConfig.getParentLocation();
// assume we will find the file locally
URL localURL = new URL(localConfig.getURL(), path);
if (!FILE_PROTOCOL.equals(localURL.getProtocol()) || parentConfig == null)
if (!FILE_PROTOCOL.equals(localURL.getProtocol()) || parentConfig == null) {
// we only support cascaded file: URLs
return localURL;
File localFile = new File(localURL.getPath());
if (localFile.exists())
}
if (Files.exists(URIUtil.toFilePath(localURL))) {
// file exists in local configuration
return localURL;
}
// try to find in the parent configuration
URL parentURL = new URL(parentConfig.getURL(), path);
if (FILE_PROTOCOL.equals(parentURL.getProtocol())) {
// we only support cascaded file: URLs
File parentFile = new File(parentURL.getPath());
if (parentFile.exists()) {
// parent has the location
parentConfiguration = true;
return parentURL;
}
// we only support cascaded file: URLs
if (FILE_PROTOCOL.equals(parentURL.getProtocol()) && Files.exists(URIUtil.toFilePath(parentURL))) {
// parent has the location
parentConfiguration = true;
return parentURL;
}
return localURL;
}
Expand Down
33 changes: 31 additions & 2 deletions bundles/org.eclipse.equinox.common/src/org/eclipse/core/runtime/URIUtil.java
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Expand Up @@ -15,6 +15,7 @@

import java.io.File;
import java.net.*;
import java.nio.file.Path;

/**
* A utility class for manipulating URIs. This class works around some of the
Expand Down Expand Up @@ -312,11 +313,12 @@ public static URI toURI(URL url) throws URISyntaxException {
// URL behaves differently across platforms so for file: URLs we parse from
// string form
if (SCHEME_FILE.equals(url.getProtocol())) {
String pathString = url.toExternalForm().substring(5);
String pathString = url.toExternalForm().substring(SCHEME_FILE.length() + 1);
// ensure there is a leading slash to handle common malformed URLs such as
// file:c:/tmp
if (pathString.indexOf('/') != 0)
if (!pathString.startsWith("/")) { //$NON-NLS-1$
pathString = '/' + pathString;
}
return toURI(SCHEME_FILE, null, pathString, null);
}
try {
Expand All @@ -328,6 +330,33 @@ public static URI toURI(URL url) throws URISyntaxException {
}
}

/**
* Returns the {@code Path} specified by the given {@code file} {@link URL}.
*
* @throws IllegalArgumentException if the specified URL does not use the
* {@code file} protocol
*
* @since 3.20
*/
public static Path toFilePath(URL url) {
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That the name contains File and Path seems to be a duplication at first, but since any kind of URL can have a path I think it should be made clear that it's a file-system path (although nio-Path can also handle non-classical file-systems).
On the other hand toFileSystemPath() seemed to be a bit verbose to me.

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Only food for thought, this suggestion isn't common convention. Could use Path fromFileUrl(URL url).
Cannot say I like that, but it seems to make it clear.

if (!SCHEME_FILE.equals(url.getProtocol())) {
throw new IllegalArgumentException("Not a 'file' url: " + url); //$NON-NLS-1$
}
Comment on lines +342 to +344
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Alternatively this method could return an empty optional if the URL is not a file-URL.
But since callers that are able to handle other protocols can simple check the precondition before calling this method, I think it's fine to keep it simple for those cases where a file-URL is used with certainty.

try {
return Path.of(url.toURI());
} catch (URISyntaxException | IllegalArgumentException e) {
try {
return Path.of(toURI(url));
} catch (URISyntaxException e1) {
String pathString = url.toExternalForm().substring(SCHEME_FILE.length() + 1);
if (pathString.length() > 1 && pathString.charAt(0) == '/' && pathString.charAt(1) != '/') {
pathString = pathString.substring(1);
}
return Path.of(pathString);
}
}
}

/**
* An UNC-safe factory the the URI-ctor
*
Expand Down
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