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Revisit ScriptTemplateView resource loading

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Resources are now retrieved using the application context in order to
support natively non-classpath locations like /WEB-INF/...

As a consequence of this refactoring, ScriptTemplateView#createClassLoader()
protected method as been removed, since it did not make sense anymore with
this new resource loading implementation.

Issue: SPR-14210
This commit is contained in:
Sebastien Deleuze
2016-04-26 14:40:39 +02:00
parent 9412f7a094
commit 15138ed96f
2 changed files with 52 additions and 59 deletions
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56
spring-webmvc/src/main/java/org/springframework/web/servlet/view/script/ScriptTemplateView.java
View File

@@ -18,8 +18,6 @@ package org.springframework.web.servlet.view.script;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLClassLoader;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.Arrays;
@@ -40,7 +38,6 @@ import org.springframework.beans.factory.NoSuchBeanDefinitionException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextException;
import org.springframework.core.NamedThreadLocal;
import org.springframework.core.io.DefaultResourceLoader;
import org.springframework.core.io.Resource;
import org.springframework.core.io.ResourceLoader;
import org.springframework.scripting.support.StandardScriptEvalException;
@@ -96,7 +93,7 @@ public class ScriptTemplateView extends AbstractUrlBasedView {
private Charset charset;
private String resourceLoaderPath;
private String[] resourceLoaderPaths;
private ResourceLoader resourceLoader;
@@ -184,7 +181,16 @@ public class ScriptTemplateView extends AbstractUrlBasedView {
* See {@link ScriptTemplateConfigurer#setResourceLoaderPath(String)} documentation.
*/
public void setResourceLoaderPath(String resourceLoaderPath) {
this.resourceLoaderPath = resourceLoaderPath;
String[] paths = StringUtils.commaDelimitedListToStringArray(resourceLoaderPath);
this.resourceLoaderPaths = new String[paths.length + 1];
this.resourceLoaderPaths[0] = "";
for (int i = 0; i < paths.length; i++) {
String path = paths[i];
if (!path.endsWith("/") && !path.endsWith(":")) {
path = path + "/";
}
this.resourceLoaderPaths[i + 1] = path;
}
}
@@ -214,12 +220,12 @@ public class ScriptTemplateView extends AbstractUrlBasedView {
if (this.charset == null) {
this.charset = (viewConfig.getCharset() != null ? viewConfig.getCharset() : DEFAULT_CHARSET);
}
if (this.resourceLoaderPath == null) {
this.resourceLoaderPath = (viewConfig.getResourceLoaderPath() != null ?
viewConfig.getResourceLoaderPath() : DEFAULT_RESOURCE_LOADER_PATH);
if (this.resourceLoaderPaths == null) {
String resourceLoaderPath = viewConfig.getResourceLoaderPath();
setResourceLoaderPath(resourceLoaderPath == null ? DEFAULT_RESOURCE_LOADER_PATH : resourceLoaderPath);
}
if (this.resourceLoader == null) {
this.resourceLoader = new DefaultResourceLoader(createClassLoader());
this.resourceLoader = getApplicationContext();
}
if (this.sharedEngine == null && viewConfig.isSharedEngine() != null) {
this.sharedEngine = viewConfig.isSharedEngine();
@@ -282,10 +288,7 @@ public class ScriptTemplateView extends AbstractUrlBasedView {
if (!ObjectUtils.isEmpty(this.scripts)) {
try {
for (String script : this.scripts) {
Resource resource = this.resourceLoader.getResource(script);
if (!resource.exists()) {
throw new IllegalStateException("Script resource [" + script + "] not found");
}
Resource resource = getResource(script);
engine.eval(new InputStreamReader(resource.getInputStream()));
}
}
@@ -295,26 +298,14 @@ public class ScriptTemplateView extends AbstractUrlBasedView {
}
}
protected ClassLoader createClassLoader() {
String[] paths = StringUtils.commaDelimitedListToStringArray(this.resourceLoaderPath);
List<URL> urls = new ArrayList<URL>();
try {
for (String path : paths) {
Resource[] resources = getApplicationContext().getResources(path);
if (resources.length > 0) {
for (Resource resource : resources) {
if (resource.exists()) {
urls.add(resource.getURL());
}
}
}
protected Resource getResource(String location) {
for (String path : this.resourceLoaderPaths) {
Resource resource = this.resourceLoader.getResource(path + location);
if (resource.exists()) {
return resource;
}
}
catch (IOException ex) {
throw new IllegalStateException("Cannot create class loader: " + ex.getMessage());
}
ClassLoader classLoader = getApplicationContext().getClassLoader();
return (urls.size() > 0 ? new URLClassLoader(urls.toArray(new URL[urls.size()]), classLoader) : classLoader);
throw new IllegalStateException("Resource [" + location + "] not found");
}
protected ScriptTemplateConfig autodetectViewConfig() throws BeansException {
@@ -329,7 +320,6 @@ public class ScriptTemplateView extends AbstractUrlBasedView {
}
}
@Override
protected void prepareResponse(HttpServletRequest request, HttpServletResponse response) {
super.prepareResponse(request, response);
@@ -365,7 +355,7 @@ public class ScriptTemplateView extends AbstractUrlBasedView {
}
protected String getTemplate(String path) throws IOException {
Resource resource = this.resourceLoader.getResource(path);
Resource resource = getResource(path);
InputStreamReader reader = new InputStreamReader(resource.getInputStream(), this.charset);
return FileCopyUtils.copyToString(reader);
}