Mercurial Hosting > luan

comparison src/luan/host/WebHandler.java @ 1185:94cf2576a922

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implement WebHandler for nginx
author Franklin Schmidt <fschmidt@gmail.com>
date Wed, 21 Feb 2018 21:22:16 -0700
parents src/luan/host/jetty/WebHandler.java@0b55a1af5a44
children 83c8a5a47f70
comparison
equal deleted inserted replaced
1184:2eba58842bbb 1185:94cf2576a922
1 package luan.host;
2
3 import java.io.File;
4 import java.io.IOException;
5 import java.util.Map;
6 import java.util.HashMap;
7 import org.slf4j.Logger;
8 import org.slf4j.LoggerFactory;
9 import luan.webserver.Handler;
10 import luan.webserver.Server;
11 import luan.webserver.Request;
12 import luan.webserver.Response;
13 import luan.webserver.handlers.IndexHandler;
14 import luan.webserver.handlers.ListHandler;
15 import luan.Luan;
16 import luan.LuanState;
17 import luan.LuanException;
18 import luan.LuanTable;
19 import luan.LuanFunction;
20 import luan.modules.IoLuan;
21 import luan.modules.JavaLuan;
22 import luan.modules.PackageLuan;
23 import luan.modules.http.LuanHandler;
24 import luan.modules.http.NotFound;
25
26
27 public class WebHandler implements Handler {
28 private static final Logger logger = LoggerFactory.getLogger(WebHandler.class);
29
30 private static class Site {
31 final Handler handler;
32 final LuanHandler luanHandler;
33
34 Site(Handler handler,LuanHandler luanHandler) {
35 this.handler = handler;
36 this.luanHandler = luanHandler;
37 }
38 }
39
40 public static String allowJavaFileName = "allow_java"; // change for security
41 private static final Map<String,Site> siteMap = new HashMap<String,Site>();
42 private static String sitesDir = null;
43 public static Server server;
44
45 public static boolean isServing() {
46 return sitesDir != null;
47 }
48
49 public WebHandler(String dir) {
50 if( sitesDir != null )
51 throw new RuntimeException("already set");
52 if( !new File(dir).exists() )
53 throw new RuntimeException();
54 this.sitesDir = dir;
55 }
56
57 public Response handle(Request request) {
58 String host = (String)request.headers.get("host");
59 int i = host.indexOf(':');
60 String domain = i == -1 ? host : host.substring(0,i);
61 // System.out.println("handle "+domain);
62 Site site = getSite(domain);
63 return site==null ? null : site.handler.handle(request);
64 }
65
66 public static Object runLuan(String domain,String sourceText,String sourceName) throws LuanException {
67 return getSite(domain).luanHandler.runLuan(sourceText,sourceName);
68 }
69
70 public static Object callSite(String domain,String fnName,Object... args) throws LuanException {
71 return getSite(domain).luanHandler.call_rpc(fnName,args);
72 }
73
74 private static Site getSite(String domain) {
75 synchronized(siteMap) {
76 Site site = siteMap.get(domain);
77 if( site == null ) {
78 if( sitesDir==null )
79 throw new NullPointerException("sitesDir");
80 File dir = new File(sitesDir,domain);
81 if( !dir.exists() /* && !recover(dir) */ )
82 return null;
83 site = newSite(dir.toString(),domain);
84 siteMap.put(domain,site);
85 }
86 return site;
87 }
88 }
89 /*
90 private static boolean recover(File dir) {
91 File backups = new File(dir.getParentFile().getParentFile(),"backups");
92 if( !backups.exists() )
93 return false;
94 String name = dir.getName();
95 File from = null;
96 for( File backup : backups.listFiles() ) {
97 File d = new File(backup,"current/"+name);
98 if( d.exists() && (from==null || from.lastModified() < d.lastModified()) )
99 from = d;
100 }
101 if( from == null )
102 return false;
103 if( !from.renameTo(dir) )
104 throw new RuntimeException("couldn't rename "+from+" to "+dir);
105 logger.info("recovered "+name+" from "+from);
106 return true;
107 }
108 */
109 static LuanTable initLuan(LuanState luan,String dir,String domain) {
110 LuanTable init;
111 try {
112 init = (LuanTable)luan.eval(
113 "local Luan = require 'luan:Luan.luan'\n"
114 +"local f = Luan.load_file 'classpath:luan/host/Init.luan'\n"
115 +"return f('"+dir+"','"+domain+"')\n"
116 );
117 } catch(LuanException e) {
118 throw new RuntimeException(e);
119 }
120 File allowJavaFile = new File(dir,"site/private/"+allowJavaFileName);
121 if( !allowJavaFile.exists() ) {
122 JavaLuan.setSecurity( luan, javaSecurity );
123 IoLuan.setSecurity( luan, ioSecurity(dir) );
124 }
125 return init;
126 }
127
128 private static Site newSite(String dir,String domain) {
129 LuanState luan = new LuanState();
130 LuanTable init = initLuan(luan,dir,domain);
131
132 String loggerRoot = (String)init.rawGet("logger_root");
133 LuanHandler luanHandler = new LuanHandler(luan,loggerRoot);
134 NotFound notFoundHandler = new NotFound(luanHandler);
135
136 Handler handler = luanHandler;
137 handler = new IndexHandler(handler);
138 handler = new ListHandler( handler, notFoundHandler );
139
140 String logDir = dir+"/site/private/local/logs/web";
141 new File(logDir).mkdirs();
142
143 return new Site(handler,luanHandler);
144 }
145
146 public static void removeHandler(String domain) throws Exception {
147 synchronized(siteMap) {
148 Site site = siteMap.remove(domain);
149 if( site != null ) {
150 site.luanHandler.close();
151 }
152 }
153 }
154
155 public static void loadHandler(String domain) {
156 getSite(domain);
157 }
158
159 private static final IoLuan.Security ioSecurity(String dir) {
160 final String siteUri = "file:" + dir + "/site";
161 return new IoLuan.Security() {
162 public void check(LuanState luan,String name) throws LuanException {
163 if( name.startsWith("file:") ) {
164 if( name.contains("..") )
165 throw new LuanException("Security violation - '"+name+"' contains '..'");
166 if( !(name.equals(siteUri) || name.startsWith(siteUri+"/")) )
167 throw new LuanException("Security violation - '"+name+"' outside of site dir");
168 }
169 else if( name.startsWith("classpath:luan/host/") ) {
170 throw new LuanException("Security violation");
171 }
172 else if( name.startsWith("os:") || name.startsWith("bash:") ) {
173 throw new LuanException("Security violation");
174 }
175 }
176 };
177 }
178
179 private static final JavaLuan.Security javaSecurity = new JavaLuan.Security() {
180 public void check(LuanState luan,String name) throws LuanException {
181 if( !name.startsWith("luan:") )
182 throw new LuanException("Security violation - only luan:* modules can load Java");
183 if( name.equals("luan:logging/Logging") )
184 throw new LuanException("Security violation - cannot reload Logging");
185 }
186 };
187 }