annotate src/luan/host/WebHandler.java @ 1392:002152af497a

hosted postgres
author Franklin Schmidt <fschmidt@gmail.com>
date Fri, 06 Sep 2019 00:19:47 -0600
parents 5c3702f60200
children 221eedb0f54e
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1 package luan.host;
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2
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3 import java.io.File;
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4 import luan.lib.logging.Logger;
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5 import luan.lib.logging.LoggerFactory;
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6 import luan.lib.webserver.Handler;
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7 import luan.lib.webserver.Request;
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8 import luan.lib.webserver.Response;
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9 import luan.lib.webserver.handlers.DomainHandler;
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10 import luan.Luan;
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11 import luan.LuanException;
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12 import luan.LuanTable;
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13 import luan.LuanFunction;
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14 import luan.LuanClosure;
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15 import luan.LuanRuntimeException;
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16 import luan.modules.BasicLuan;
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17 import luan.modules.http.LuanHandler;
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18 import luan.modules.logging.Log4j;
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19
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20
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21 public class WebHandler implements Handler {
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22 private static final Logger logger = LoggerFactory.getLogger(WebHandler.class);
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23
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24 private static final DomainHandler.Factory factory = new DomainHandler.Factory() {
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25 public Handler newHandler(String domain) {
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26 File dir = new File(sitesDir,domain);
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27 if( !dir.exists() /* && !recover(dir) */ )
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28 return null;
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29 String dirStr = dir.toString();
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30
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31 String logDir = dirStr + "/site/private/local/logs/web";
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32 new File(logDir).mkdirs();
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33
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34 Luan luan = new Luan();
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35 Log4j.newLoggerRepository(luan);
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36 initLuan(luan,dirStr,domain);
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37 return new LuanHandler(luan);
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38 }
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39 };
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40
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41 public static String securityPassword = "password"; // change for security
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42 private static final DomainHandler domainHandler = new DomainHandler(factory);
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43 private static String sitesDir = null;
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44
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45 public WebHandler(String dir) {
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46 if( sitesDir != null )
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47 throw new RuntimeException("already set");
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48 if( !new File(dir).exists() )
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49 throw new RuntimeException();
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50 sitesDir = dir;
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51 }
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52
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53 @Override public Response handle(Request request) {
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54 return domainHandler.handle(request);
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55 }
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56
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57 public static Object callSite(String domain,String fnName,Object... args) throws LuanException {
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58 LuanHandler luanHandler = (LuanHandler)domainHandler.getHandler(domain);
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59 return luanHandler.call_rpc(fnName,args);
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60 }
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61
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62 /*
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63 private static boolean recover(File dir) {
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64 File backups = new File(dir.getParentFile().getParentFile(),"backups");
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65 if( !backups.exists() )
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66 return false;
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67 String name = dir.getName();
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68 File from = null;
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69 for( File backup : backups.listFiles() ) {
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70 File d = new File(backup,"current/"+name);
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71 if( d.exists() && (from==null || from.lastModified() < d.lastModified()) )
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72 from = d;
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73 }
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74 if( from == null )
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75 return false;
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76 if( !from.renameTo(dir) )
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77 throw new RuntimeException("couldn't rename "+from+" to "+dir);
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78 logger.info("recovered "+name+" from "+from);
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79 return true;
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80 }
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81 */
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82 private static void initLuan(Luan luan,String dir,String domain) {
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83 security(luan,dir);
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84 try {
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85 LuanFunction fn = BasicLuan.load_file(luan,"classpath:luan/host/init.luan");
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86 fn.call(dir,domain);
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87 } catch(LuanException e) {
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88 throw new LuanRuntimeException(e);
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89 }
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90 }
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91
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92 public static void removeHandler(String domain) {
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93 domainHandler.removeHandler(domain);
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94 }
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95
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96 public static void loadHandler(String domain) throws LuanException {
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97 try {
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98 domainHandler.getHandler(domain);
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99 } catch(LuanRuntimeException e) {
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100 throw (LuanException)e.getCause();
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101 }
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102 }
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103
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104 private static final void security(Luan luan,String dir) {
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105 final String siteUri = "file:" + dir + "/site";
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106 Luan.Security security = new Luan.Security() {
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107 public void check(Luan luan,LuanClosure closure,String op,Object... args)
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108 throws LuanException
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109 {
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110 if( op.equals("uri") ) {
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111 String name = (String)args[0];
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112 if( name.startsWith("file:") ) {
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113 if( name.contains("..") )
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114 throw new LuanException("Security violation - '"+name+"' contains '..'");
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115 if( !(name.equals(siteUri) || name.startsWith(siteUri+"/")) )
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116 throw new LuanException("Security violation - '"+name+"' outside of site dir");
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117 }
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118 else if( name.startsWith("classpath:luan/host/") ) {
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119 throw new LuanException("Security violation");
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120 }
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121 else if( name.startsWith("os:") || name.startsWith("bash:") ) {
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122 throw new LuanException("Security violation");
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123 }
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124 } else {
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125 String name = closure.sourceName;
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126 if( !(
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127 name.startsWith("luan:")
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128 || name.startsWith("classpath:")
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129 || name.matches("^file:[^/]+$")
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130 ) )
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131 throw new LuanException("Security violation - only luan:* modules can load Java");
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132 if( name.equals("luan:logging/Logging") )
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133 throw new LuanException("Security violation - cannot reload Logging");
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134 }
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135 }
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136 };
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137 Luan.setSecurity(luan,security);
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138 }
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139
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140 }