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// Copyright (C) 2009 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.google.gerrit.httpd;
import com.google.gerrit.common.data.GitWebType;
import com.google.gerrit.server.config.GerritServerConfig;
import com.google.gerrit.server.config.SitePaths;
import com.google.inject.Inject;
import org.eclipse.jgit.lib.Config;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.File;
public class GitWebConfig {
private static final Logger log = LoggerFactory.getLogger(GitWebConfig.class);
private final String url;
private final File gitweb_cgi;
private final File gitweb_css;
private final File gitweb_js;
private final File git_logo_png;
private GitWebType type;
@Inject
GitWebConfig(final SitePaths sitePaths, @GerritServerConfig final Config cfg) {
final String cfgUrl = cfg.getString("gitweb", null, "url");
final String cfgCgi = cfg.getString("gitweb", null, "cgi");
type = GitWebType.fromName(cfg.getString("gitweb", null, "type"));
if (type == null) {
url = null;
gitweb_cgi = null;
gitweb_css = null;
gitweb_js = null;
git_logo_png = null;
return;
}
type.setLinkName(cfg.getString("gitweb", null, "linkname"));
type.setBranch(cfg.getString("gitweb", null, "branch"));
type.setProject(cfg.getString("gitweb", null, "project"));
type.setRevision(cfg.getString("gitweb", null, "revision"));
type.setRootTree(cfg.getString("gitweb", null, "roottree"));
type.setFile(cfg.getString("gitweb", null, "file"));
type.setFileHistory(cfg.getString("gitweb", null, "filehistory"));
type.setLinkDrafts(cfg.getBoolean("gitweb", null, "linkdrafts", true));
type.setUrlEncode(cfg.getBoolean("gitweb", null, "urlencode", true));
String pathSeparator = cfg.getString("gitweb", null, "pathSeparator");
if (pathSeparator != null) {
if (pathSeparator.length() == 1) {
char c = pathSeparator.charAt(0);
if (isValidPathSeparator(c)) {
type.setPathSeparator(c);
} else {
log.warn("Invalid value specified for gitweb.pathSeparator: " + c);
}
} else {
log.warn("Value specified for gitweb.pathSeparator is not a single character:" + pathSeparator);
}
}
if (type.getBranch() == null) {
log.warn("No Pattern specified for gitweb.branch, disabling.");
type = null;
} else if (type.getProject() == null) {
log.warn("No Pattern specified for gitweb.project, disabling.");
type = null;
} else if (type.getRevision() == null) {
log.warn("No Pattern specified for gitweb.revision, disabling.");
type = null;
} else if (type.getRootTree() == null) {
log.warn("No Pattern specified for gitweb.roottree, disabling.");
type = null;
} else if (type.getFile() == null) {
log.warn("No Pattern specified for gitweb.file, disabling.");
type = null;
} else if (type.getFileHistory() == null) {
log.warn("No Pattern specified for gitweb.filehistory, disabling.");
type = null;
}
if ((cfgUrl != null && cfgUrl.isEmpty())
|| (cfgCgi != null && cfgCgi.isEmpty())) {
// Either setting was explicitly set to the empty string disabling
// gitweb for this server. Disable the configuration.
//
url = null;
gitweb_cgi = null;
gitweb_css = null;
gitweb_js = null;
git_logo_png = null;
return;
}
if ((cfgUrl != null) && (cfgCgi == null || cfgCgi.isEmpty())) {
// Use an externally managed gitweb instance, and not an internal one.
//
url = cfgUrl;
gitweb_cgi = null;
gitweb_css = null;
gitweb_js = null;
git_logo_png = null;
return;
}
final File pkgCgi = new File("/usr/lib/cgi-bin/gitweb.cgi");
String[] resourcePaths = {"/usr/share/gitweb/static", "/usr/share/gitweb",
"/var/www/static", "/var/www"};
File cgi;
if (cfgCgi != null) {
// Use the CGI script configured by the administrator, failing if it
// cannot be used as specified.
//
cgi = sitePaths.resolve(cfgCgi);
if (!cgi.isFile()) {
throw new IllegalStateException("Cannot find gitweb.cgi: " + cgi);
}
if (!cgi.canExecute()) {
throw new IllegalStateException("Cannot execute gitweb.cgi: " + cgi);
}
if (!cgi.equals(pkgCgi)) {
// Assume the administrator pointed us to the distribution,
// which also has the corresponding CSS and logo file.
//
String absPath = cgi.getParentFile().getAbsolutePath();
resourcePaths = new String[] {absPath + "/static", absPath};
}
} else if (pkgCgi.isFile() && pkgCgi.canExecute()) {
// Use the OS packaged CGI.
//
log.debug("Assuming gitweb at " + pkgCgi);
cgi = pkgCgi;
} else {
log.warn("gitweb not installed (no " + pkgCgi + " found)");
cgi = null;
resourcePaths = new String[] {};
}
File css = null, js = null, logo = null;
for (String path : resourcePaths) {
File dir = new File(path);
css = new File(dir, "gitweb.css");
js = new File(dir, "gitweb.js");
logo = new File(dir, "git-logo.png");
if (css.isFile() && logo.isFile()) {
break;
}
}
if (cfgUrl == null || cfgUrl.isEmpty()) {
url = cgi != null ? "gitweb" : null;
} else {
url = cgi != null ? cfgUrl : null;
}
gitweb_cgi = cgi;
gitweb_css = css;
gitweb_js = js;
git_logo_png = logo;
}
/** @return GitWebType for gitweb viewer. */
public GitWebType getGitWebType() {
return type;
}
/**
* @return URL of the entry point into gitweb. This URL may be relative to our
* context if gitweb is hosted by ourselves; or absolute if its hosted
* elsewhere; or null if gitweb has not been configured.
*/
public String getUrl() {
return url;
}
/** @return local path to the CGI executable; null if we shouldn't execute. */
public File getGitwebCGI() {
return gitweb_cgi;
}
/** @return local path of the {@code gitweb.css} matching the CGI. */
public File getGitwebCSS() {
return gitweb_css;
}
/** @return local path of the {@code gitweb.js} for the CGI. */
public File getGitwebJS() {
return gitweb_js;
}
/** @return local path of the {@code git-logo.png} for the CGI. */
public File getGitLogoPNG() {
return git_logo_png;
}
/**
* Determines if a given character can be used unencoded in an URL as a
* replacement for the path separator '/'.
*
* Reasoning: http://www.ietf.org/rfc/rfc1738.txt § 2.2:
*
* ... only alphanumerics, the special characters "$-_.+!*'(),", and
* reserved characters used for their reserved purposes may be used
* unencoded within a URL.
*
* The following characters might occur in file names, however:
*
* alphanumeric characters,
*
* "$-_.+!',"
*/
static boolean isValidPathSeparator(char c) {
switch (c) {
case '*':
case '(':
case ')':
return true;
default:
return false;
}
}
}
