/** Serves <tt>help.html</tt> from the resource of {@link #clazz}. */
public void doHelp(StaplerRequest req, StaplerResponse rsp) throws IOException, ServletException {
String path = req.getRestOfPath();
if (path.contains("..")) throw new ServletException("Illegal path: " + path);
path = path.replace('/', '-');
for (Class c = clazz; c != null; c = c.getSuperclass()) {
RequestDispatcher rd = Stapler.getCurrentRequest().getView(c, "help" + path);
if (rd != null) { // Jelly-generated help page
rd.forward(req, rsp);
return;
}
InputStream in = getHelpStream(c, path);
if (in != null) {
// TODO: generalize macro expansion and perhaps even support JEXL
rsp.setContentType("text/html;charset=UTF-8");
String literal = IOUtils.toString(in, "UTF-8");
rsp.getWriter()
.println(
Util.replaceMacro(
literal, Collections.singletonMap("rootURL", req.getContextPath())));
in.close();
return;
}
}
rsp.sendError(SC_NOT_FOUND);
}
private String getViewPage(Class<?> clazz, String pageName, String defaultValue) {
while (clazz != Object.class) {
String name = clazz.getName().replace('.', '/').replace('$', '/') + "/" + pageName;
if (clazz.getClassLoader().getResource(name) != null) return '/' + name;
clazz = clazz.getSuperclass();
}
return defaultValue;
}
/**
* Returns the path to the help screen HTML for the given field.
*
* <p>The help files are assumed to be at "help/FIELDNAME.html" with possible locale variations.
*/
public String getHelpFile(final String fieldName) {
for (Class c = clazz; c != null; c = c.getSuperclass()) {
String page = "/descriptor/" + getId() + "/help";
String suffix;
if (fieldName == null) {
suffix = "";
} else {
page += '/' + fieldName;
suffix = '-' + fieldName;
}
try {
if (Stapler.getCurrentRequest().getView(c, "help" + suffix) != null) return page;
} catch (IOException e) {
throw new Error(e);
}
InputStream in = getHelpStream(c, suffix);
IOUtils.closeQuietly(in);
if (in != null) return page;
}
return null;
}