VIVO-1405 Add pseudo-version to requests for scripts and stylesheets.
The result is that the user does not need to refresh the browser cache when a new version of VIVO is deployed on the server.
This commit is contained in:
Jim Blake
parent
0e15b9a69a
commit
b00633326e
2 changed files with 497 additions and 64 deletions
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@ -2,82 +2,267 @@
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package edu.cornell.mannlib.vitro.webapp.web.templatemodels;
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package edu.cornell.mannlib.vitro.webapp.web.templatemodels;
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import java.io.File;
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import java.lang.reflect.Method;
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import java.util.LinkedHashSet;
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import java.util.LinkedHashSet;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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import javax.servlet.ServletContext;
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import freemarker.ext.beans.MethodAppearanceFineTuner;
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import org.apache.commons.lang3.StringUtils;
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import org.apache.commons.lang3.StringUtils;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.apache.commons.logging.LogFactory;
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import edu.cornell.mannlib.vitro.webapp.application.ApplicationUtils;
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import edu.cornell.mannlib.vitro.webapp.controller.freemarker.UrlBuilder;
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import freemarker.ext.beans.BeansWrapper;
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import freemarker.ext.beans.BeansWrapper;
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import freemarker.template.TemplateModel;
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import freemarker.template.TemplateModel;
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import freemarker.template.TemplateModelException;
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import freemarker.template.TemplateModelException;
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/**
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* Provides a mechanism for Freemarker templates (main or included, parent or
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* child) to add to the lists of scripts and style sheets for the current page.
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*
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* Each page uses 3 instances of Tags, exposed as ${scripts}, ${headScripts} and
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* ${stylesheets}. A template may add a complete <script/$gt; element (for
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* scripts or headScripts) or a <link> tag (for stylesheets), and these
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* elements will appear at the proper location in the rendered HTML for the
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* page.
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*
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* VIVO-1405: This process is augmented by the TagVersionInfo inner class, which
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* attempts to add a "version=" query string to the URL in the supplied element.
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* The version number is derived from the last-modified date of the specified
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* script or stylesheet on the server. The effect is that a user's browser cache
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* is effectively invalidated each time a new version of the script or
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* stylesheet is deployed.
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*/
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public class Tags extends BaseTemplateModel {
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public class Tags extends BaseTemplateModel {
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private static final Log log = LogFactory.getLog(Tags.class);
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private static final Log log = LogFactory.getLog(Tags.class);
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protected final LinkedHashSet<String> tags;
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protected final LinkedHashSet<String> tags;
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public Tags() {
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this.tags = new LinkedHashSet<String>();
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}
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public Tags() {
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public Tags(LinkedHashSet<String> tags) {
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this.tags = new LinkedHashSet<String>();
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this.tags = tags;
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}
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}
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public Tags(LinkedHashSet<String> tags) {
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public TemplateModel wrap() {
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this.tags = tags;
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try {
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}
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return new TagsWrapper().wrap(this);
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} catch (TemplateModelException e) {
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log.error("Error creating Tags template model");
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return null;
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}
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}
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public TemplateModel wrap() {
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/**
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try {
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* Script and stylesheet lists are wrapped with a specialized BeansWrapper
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return new TagsWrapper().wrap(this);
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* that exposes certain write methods, instead of the configuration's object
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} catch (TemplateModelException e) {
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* wrapper, which doesn't. The templates can then add stylesheets and
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log.error("Error creating Tags template model");
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* scripts to the lists by calling their add() methods.
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return null;
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*
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}
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* @param Tags
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}
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* tags
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* @return TemplateModel
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*/
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static public class TagsWrapper extends BeansWrapper {
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/** Script and stylesheet lists are wrapped with a specialized BeansWrapper
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public TagsWrapper() {
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* that exposes certain write methods, instead of the configuration's object wrapper,
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// Start by exposing all safe methods.
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* which doesn't. The templates can then add stylesheets and scripts to the lists
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setExposureLevel(EXPOSE_SAFE);
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* by calling their add() methods.
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}
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*/
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static public class TagsWrapper extends BeansWrapper {
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public TagsWrapper() {
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@SuppressWarnings("rawtypes")
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// Start by exposing all safe methods.
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@Override
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setExposureLevel(EXPOSE_SAFE);
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protected void finetuneMethodAppearance(Class cls, Method method,
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setMethodAppearanceFineTuner(new MethodAppearanceFineTuner() {
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MethodAppearanceDecision decision) {
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@Override
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public void process(MethodAppearanceDecisionInput methodAppearanceDecisionInput, MethodAppearanceDecision methodAppearanceDecision) {
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try {
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String methodName = methodAppearanceDecisionInput.getMethod().getName();
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if ( ! ( methodName.equals("add") || methodName.equals("list")) ) {
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methodAppearanceDecision.setExposeMethodAs(null);
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}
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} catch (Exception e) {
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log.error(e, e);
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}
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}
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});
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}
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}
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try {
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String methodName = method.getName();
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if (!(methodName.equals("add") || methodName.equals("list"))) {
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decision.setExposeMethodAs(null);
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}
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} catch (Exception e) {
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log.error(e, e);
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}
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}
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}
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/* Template methods */
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/* Template methods */
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public void add(String... tags) {
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@SuppressWarnings("hiding")
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for (String tag : tags) {
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public void add(String... tags) {
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add(tag);
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for (String tag : tags) {
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}
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add(tag);
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}
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}
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}
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public void add(String tag) {
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public void add(String tag) {
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tags.add(tag);
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TagVersionInfo info = new TagVersionInfo(tag);
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}
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if (info.hasVersion()) {
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tags.add(TagVersionInfo.addVersionNumber(tag, info));
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} else {
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tags.add(tag);
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}
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}
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public String list() {
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public String list() {
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return StringUtils.join(tags, "\n");
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return StringUtils.join(tags, "\n");
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}
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}
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/**
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* Find the value of "href" or "src".
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*
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* If there is such a value, and it doesn't have a query string already, and
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* it represents a local URL, and we can locate the file that is served by
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* the URL and get the last modified date, then we have found a "version
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* number" that we can add to the attribute value.
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*
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* Reference for parsing attributes:
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* https://www.w3.org/TR/html/syntax.html#elements-attributes
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*/
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protected static class TagVersionInfo {
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private static final Pattern PATTERN_DOUBLE_QUOTES = Pattern
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.compile("(href|src)\\s*=\\s*\"([^\"]+)\"[\\s|>]");
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private static final int GROUP_INDEX_DOUBLE_QUOTES = 2;
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private static final Pattern PATTERN_SINGLE_QUOTES = Pattern
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.compile("(href|src)\\s*=\\s*'([^']+)'[\\s|>]");
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private static final int GROUP_INDEX_SINGLE_QUOTES = 2;
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private static final Pattern PATTERN_NO_QUOTES = Pattern
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.compile("(href|src)\\s*=\\s*([^\"'<=>\\s]+)[\\s|>]");
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private static final int GROUP_INDEX_NO_QUOTES = 2;
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public static String addVersionNumber(String rawTag,
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TagVersionInfo info) {
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String versionString = (info.match.style == MatchResult.Style.NO_QUOTES)
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? "?version&eq;"
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: "?version=";
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return rawTag.substring(0, info.match.start) + info.match.group
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+ versionString + smushTimeStamp(info)
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+ rawTag.substring(info.match.end);
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}
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private static String smushTimeStamp(TagVersionInfo info) {
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int smushed = (((char) (info.timestamp >> 48))
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^ ((char) (info.timestamp >> 32))
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^ ((char) (info.timestamp >> 16))
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^ ((char) info.timestamp));
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return String.format("%04x", smushed);
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}
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private MatchResult match;
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private long timestamp = 0L;
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public TagVersionInfo(String rawTag) {
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try {
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match = findUrlValue(rawTag);
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if (match != null && !hasQueryString(match.group)) {
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String stripped = stripContextPath(match.group);
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if (stripped != null) {
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String realPath = locateRealPath(stripped);
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if (realPath != null) {
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timestamp = getLastModified(realPath);
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}
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}
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}
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} catch (Exception e) {
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log.debug("Failed to add version info to tag: " + rawTag, e);
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timestamp = 0L;
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}
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}
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public boolean hasVersion() {
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return timestamp != 0L;
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}
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private static MatchResult findUrlValue(String rawTag) {
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Matcher mDouble = PATTERN_DOUBLE_QUOTES.matcher(rawTag);
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if (mDouble.find()) {
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return new MatchResult(mDouble, GROUP_INDEX_DOUBLE_QUOTES,
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MatchResult.Style.DOUBLE_QUOTES);
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}
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Matcher mSingle = PATTERN_SINGLE_QUOTES.matcher(rawTag);
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if (mSingle.find()) {
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return new MatchResult(mSingle, GROUP_INDEX_SINGLE_QUOTES,
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MatchResult.Style.SINGLE_QUOTES);
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}
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Matcher mNo = PATTERN_NO_QUOTES.matcher(rawTag);
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if (mNo.find()) {
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return new MatchResult(mNo, GROUP_INDEX_NO_QUOTES,
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MatchResult.Style.NO_QUOTES);
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}
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log.debug(rawTag + " no match");
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return null;
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}
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private static boolean hasQueryString(String group) {
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if (group.indexOf('?') > -1) {
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log.debug(group + " has query string already");
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return true;
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} else {
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return false;
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}
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}
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private static String stripContextPath(String group) {
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String contextPath = UrlBuilder.getBaseUrl();
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if (contextPath.isEmpty() || group.startsWith(contextPath)) {
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return group.substring(contextPath.length());
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} else {
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log.debug(group + " doesn't match context path");
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return null;
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}
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}
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private static String locateRealPath(String stripped) {
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ServletContext ctx = ApplicationUtils.instance()
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.getServletContext();
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String realPath = ctx.getRealPath(stripped);
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if (realPath == null) {
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log.debug(stripped + " has no real path");
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}
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return realPath;
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}
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private static long getLastModified(String realPath) {
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return new File(realPath).lastModified();
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}
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protected static class MatchResult {
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public enum Style {
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SINGLE_QUOTES, DOUBLE_QUOTES, NO_QUOTES
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}
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public final String group;
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public final int start;
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public final int end;
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public final Style style;
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public MatchResult(Matcher matcher, int group, Style style) {
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this.group = matcher.group(group);
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this.start = matcher.start(group);
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this.end = matcher.end(group);
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this.style = style;
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log.debug(this);
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}
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@Override
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public String toString() {
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return "MatchResult[start=" + start + ", end=" + end
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+ ", group=" + group + ", style=" + style + "]";
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}
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}
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}
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}
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}
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@ -0,0 +1,248 @@
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package edu.cornell.mannlib.vitro.webapp.web.templatemodels;
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import static org.hamcrest.Matchers.containsString;
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import static org.junit.Assert.assertEquals;
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import static org.junit.Assert.assertFalse;
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import static org.junit.Assert.assertThat;
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import static org.junit.Assert.fail;
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import java.io.File;
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import java.io.IOException;
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import java.io.StringWriter;
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import java.lang.reflect.Field;
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import org.apache.log4j.Level;
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import org.junit.Before;
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import org.junit.Ignore;
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import org.junit.Test;
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import edu.cornell.mannlib.vitro.testing.AbstractTestClass;
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import edu.cornell.mannlib.vitro.webapp.controller.freemarker.UrlBuilder;
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import edu.cornell.mannlib.vitro.webapp.web.templatemodels.Tags.TagVersionInfo;
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import edu.cornell.mannlib.vitro.webapp.web.templatemodels.Tags.TagVersionInfo.MatchResult;
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import stubs.edu.cornell.mannlib.vitro.webapp.modules.ApplicationStub;
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import stubs.javax.servlet.ServletContextStub;
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public class TagsTest extends AbstractTestClass {
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private ServletContextStub ctx;
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private File resource;
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@Before
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public void setup() throws IOException {
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resource = File.createTempFile("resource", "");
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ctx = new ServletContextStub();
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ctx.setRealPath("/base/sub/file.js", resource.getPath());
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ctx.setRealPath("/base/sub/file.css", resource.getPath());
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ApplicationStub.setup(ctx, null);
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setContextPath("/context");
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}
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// ----------------------------------------------------------------------
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// Parsing tests
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//
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// Reference for parsing attributes:
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// https://www.w3.org/TR/html/syntax.html#elements-attributes
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// ----------------------------------------------------------------------
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@Test
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public void noAttribute_failure() {
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assertNoMatch("<div height='value'></div>");
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}
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@Test
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public void singleQuote_noTerminator_failure() {
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assertNoMatch("<link rel='stylesheet' href='problem></link>");
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}
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@Test
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public void singleQuotes_embeddedSingleQuote_failure() {
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assertNoMatch("<script src='value'problem'></script");
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}
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@Test
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public void singleQuotes_embeddedDoubleQuote_success() {
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assertMatch("<script src='value\"noproblem'></script",
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"value\"noproblem");
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}
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@Test
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public void doubleQuote_noTerminator_failure() {
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assertNoMatch("<link rel=\"stylesheet\" href=\"problem ></link>");
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}
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@Test
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public void doubleQuotes_embeddedDoubleQuote_failure() {
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assertNoMatch("<link href=\"value\"problem\"></link>");
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}
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@Test
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public void doubleQuotes_embeddedSingleQuote_success() {
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assertMatch("<link href=\"value'noproblem\"></link>",
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"value'noproblem");
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}
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@Test
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public void unquotedBadTerminator_failure() {
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assertNoMatch("<script src=problem");
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}
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|
||||||
|
@Test
|
||||||
|
public void unquoted_embeddedEquals_failure() {
|
||||||
|
assertNoMatch("<script src=value=problem>");
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void unquoted_embeddedSingleQuote_failure() {
|
||||||
|
assertNoMatch("<script src=value'problem>");
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void unquoted_embeddedDoubleQuote_failure() {
|
||||||
|
assertNoMatch("<script src=value\"problem>");
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void unquoted_embeddedBackTick_failure() {
|
||||||
|
assertNoMatch("<script src=value`problem>");
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void unquoted_embeddedLessThan_failure() {
|
||||||
|
assertNoMatch("<script src=value<problem>");
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void spacesBeforeEquals_success() {
|
||||||
|
assertMatch("<link href =value rel='stylesheet'>", "value");
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void spacesAfterEquals_success() {
|
||||||
|
assertMatch("<script src= 'value'></script>", "value");
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void noSpacesAroundEquals_success() {
|
||||||
|
assertMatch("<script src=\"value\" ></script>", "value");
|
||||||
|
}
|
||||||
|
|
||||||
|
// ----------------------------------------------------------------------
|
||||||
|
// Substitution tests
|
||||||
|
// ----------------------------------------------------------------------
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void noMatch_noChange() {
|
||||||
|
assertVersionNotAdded(
|
||||||
|
"<script junk='/context/base/sub/file.js' ></script>",
|
||||||
|
"no match");
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void alreadyHasQueryString_noChange() {
|
||||||
|
assertVersionNotAdded(
|
||||||
|
"<script src='/context/base/sub/file.js?why' ></script>",
|
||||||
|
"has query");
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void doesntStartWithContextPath_noChange() {
|
||||||
|
assertVersionNotAdded(
|
||||||
|
"<script src='/notContext/base/sub/file.js' ></script>",
|
||||||
|
"context path");
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void noRealPath_noChange() {
|
||||||
|
assertVersionNotAdded(
|
||||||
|
"<script src='/context/base/sub/nofile.js' ></script>",
|
||||||
|
"real path");
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
@Ignore
|
||||||
|
public void exception_noChange() {
|
||||||
|
fail("exception_noChange not implemented");
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void doubleQuotes_substitution() {
|
||||||
|
assertVersionAdded( //
|
||||||
|
"<link href=\"/context/base/sub/file.css\" rel=stylesheet></link>", //
|
||||||
|
"<link href=\"/context/base/sub/file.css?version=9999\" rel=stylesheet></link>");
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void singleQuotes_substitution() {
|
||||||
|
assertVersionAdded( //
|
||||||
|
"<script src='/context/base/sub/file.js' ></script>", //
|
||||||
|
"<script src='/context/base/sub/file.js?version=9999' ></script>");
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void unquoted_substitution() {
|
||||||
|
assertVersionAdded( //
|
||||||
|
"<script type=text/javascript src=/context/base/sub/file.js ></script>", //
|
||||||
|
"<script type=text/javascript src=/context/base/sub/file.js?version&eq;9999 ></script>");
|
||||||
|
}
|
||||||
|
|
||||||
|
// ----------------------------------------------------------------------
|
||||||
|
// Helper methods
|
||||||
|
// ----------------------------------------------------------------------
|
||||||
|
|
||||||
|
private void setContextPath(String contextPath) {
|
||||||
|
try {
|
||||||
|
Field f = UrlBuilder.class.getDeclaredField("contextPath");
|
||||||
|
f.setAccessible(true);
|
||||||
|
f.set(null, contextPath);
|
||||||
|
} catch (Exception e) {
|
||||||
|
throw new RuntimeException(e);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
private void assertMatch(String tag, String expected) {
|
||||||
|
TagVersionInfo info = new TagVersionInfo(tag);
|
||||||
|
|
||||||
|
try {
|
||||||
|
Field f = TagVersionInfo.class.getDeclaredField("match");
|
||||||
|
f.setAccessible(true);
|
||||||
|
MatchResult match = (MatchResult) f.get(info);
|
||||||
|
|
||||||
|
assertEquals(expected, match.group);
|
||||||
|
} catch (Exception e) {
|
||||||
|
throw new RuntimeException(e);
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
||||||
|
|
||||||
|
private void assertNoMatch(String tag) {
|
||||||
|
TagVersionInfo info = new TagVersionInfo(tag);
|
||||||
|
assertFalse(info.hasVersion());
|
||||||
|
}
|
||||||
|
|
||||||
|
private void assertVersionAdded(String rawTag, String expected) {
|
||||||
|
String actual = createTag(rawTag);
|
||||||
|
String canonicalActual = actual.replaceAll("=[0-9a-f]{4}", "=9999")
|
||||||
|
.replaceAll("&eq;[0-9a-f]{4}", "&eq;9999");
|
||||||
|
assertEquals(expected, canonicalActual);
|
||||||
|
}
|
||||||
|
|
||||||
|
private void assertVersionNotAdded(String rawTag, String debugMessage) {
|
||||||
|
StringWriter writer = new StringWriter();
|
||||||
|
captureLogOutput(Tags.class, writer, true);
|
||||||
|
setLoggerLevel(Tags.class, Level.DEBUG);
|
||||||
|
|
||||||
|
String actual = createTag(rawTag);
|
||||||
|
assertEquals(rawTag, actual);
|
||||||
|
assertThat(writer.toString(), containsString(debugMessage));
|
||||||
|
}
|
||||||
|
|
||||||
|
private String createTag(String rawTag) {
|
||||||
|
Tags t = new Tags();
|
||||||
|
t.add(rawTag);
|
||||||
|
return t.list();
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
||||||
Loading…
Add table
Reference in a new issue