annotate src/goodjava/webserver/Connection.java @ 1817:969ced346cef

docs - Table
author Franklin Schmidt <fschmidt@gmail.com>
date Sun, 16 Jun 2024 20:00:50 -0600
parents 32e77b071e09
children
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1 package goodjava.webserver;
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2
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3 import java.io.InputStream;
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4 import java.io.OutputStream;
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5 import java.io.IOException;
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6 import java.net.Socket;
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7 import goodjava.logging.Logger;
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8 import goodjava.logging.LoggerFactory;
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9 import goodjava.parser.ParseException;
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10 import goodjava.io.IoUtils;
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11
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12
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13 final class Connection {
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14 private static final Logger logger = LoggerFactory.getLogger(Connection.class);
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15
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16 static void handle(Server server,Socket socket) {
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17 new Connection(server,socket).handle();
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18 }
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19
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20 private final Server server;
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21 private final Socket socket;
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22
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23 private Connection(Server server,Socket socket) {
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24 this.server = server;
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25 this.socket = socket;
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26 }
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27
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28 private void handle() {
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29 String rawHead = "";
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30 try {
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31 Request request = new Request();
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32 Response response;
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33 String contentType = null;
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34 try {
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35 InputStream in = socket.getInputStream();
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36 byte[] a = new byte[8192];
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37 int endOfHeader;
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38 int size = 0;
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39 int left = a.length;
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40 outer: while(true) {
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41 int n = in.read(a,size,left);
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42 if( n == -1 ) {
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43 if( size == 0 ) {
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44 socket.close();
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45 return;
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46 }
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47 throw new IOException("unexpected end of input at "+size);
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48 }
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49 size += n;
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50 for( int i=0; i<=size-4; i++ ) {
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51 if( a[i]=='\r' && a[i+1]=='\n' && a[i+2]=='\r' && a[i+3]=='\n' ) {
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52 endOfHeader = i + 4;
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53 break outer;
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54 }
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55 }
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56 left -= n;
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57 if( left == 0 ) {
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58 byte[] a2 = new byte[2*a.length];
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59 System.arraycopy(a,0,a2,0,size);
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60 a = a2;
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61 left = a.length - size;
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62 }
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63 }
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64 rawHead = new String(a,0,endOfHeader);
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65 //System.out.println(rawHead);
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66 request.rawHead = rawHead;
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67 RequestParser parser = new RequestParser(request);
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68 parser.parseHead();
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69
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70 String lenStr = (String)request.headers.get("content-length");
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71 if( lenStr != null ) {
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72 int len;
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73 try {
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74 len = Integer.parseInt(lenStr);
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75 } catch(NumberFormatException e) {
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76 throw new WrappedRuntimeException(e);
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77 }
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78 byte[] body = new byte[len];
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79 size -= endOfHeader;
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80 try {
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81 System.arraycopy(a,endOfHeader,body,0,size);
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82 } catch(ArrayIndexOutOfBoundsException e) {
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83 throw new WrappedRuntimeException(e);
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84 }
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85 while( size < len ) {
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86 int n = in.read(body,size,len-size);
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87 if( n == -1 ) {
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88 throw new IOException("unexpected end of input at "+size);
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89 }
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90 size += n;
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91 }
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92 request.body = body;
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93 //System.out.println(new String(request.body));
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94 }
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95
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96 contentType = (String)request.headers.get("content-type");
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97 if( contentType != null ) {
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98 contentType = contentType.toLowerCase();
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99 if( contentType.equals("application/x-www-form-urlencoded") ) {
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100 parser.parseUrlencoded(null);
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101 } else if( contentType.equals("application/x-www-form-urlencoded; charset=utf-8") ) {
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102 parser.parseUrlencoded("utf-8");
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103 } else if( contentType.startsWith("multipart/form-data;") ) {
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104 parser.parseMultipart();
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105 } else if( contentType.equals("application/json") ) {
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106 parser.parseJson(null);
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107 } else if( contentType.equals("application/json; charset=utf-8") ) {
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108 parser.parseJson("utf-8");
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109 } else {
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110 logger.info("unknown request content-type: "+contentType);
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111 }
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112 }
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113
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114 String scheme = (String)request.headers.get("x-forwarded-proto");
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115 if( scheme != null )
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116 request.scheme = scheme;
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117
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118 if( "text/event-stream".equals(request.headers.get("accept")) ) {
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119 ServerSentEvents.add(socket,request);
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120 return;
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121 }
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122
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123 response = server.handler.handle(request);
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124 } catch(ParseException e) {
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125 logger.info("parse error\n"+rawHead.trim()+"\n",e);
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126 String msg = e.toString();
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127 if( contentType != null )
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128 msg = "invalid content for content-type " + contentType + "\n" + msg;
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129 response = Response.errorResponse(Status.BAD_REQUEST,msg);
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130 }
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131 response.headers.put("Connection","close");
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132 response.headers.put("Content-Length",Long.toString(response.body.length));
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133 byte[] header = response.toHeaderString().getBytes();
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134
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135 OutputStream out = socket.getOutputStream();
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136 out.write(header);
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137 IoUtils.copyAll(response.body.content,out);
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138 out.close();
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139 socket.close();
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140 } catch(IOException e) {
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141 logger.info(rawHead.trim()+"\n",e);
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142 } catch(WrappedRuntimeException wrapped) {
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143 RuntimeException e = (RuntimeException)wrapped.getCause();
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144 logger.warn(rawHead.trim()+"\n",e);
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145 throw e;
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146 } catch(RuntimeException e) {
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147 logger.error(rawHead.trim()+"\n",e);
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148 throw e;
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149 }
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150 }
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151
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152 private static final class WrappedRuntimeException extends Exception {
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153 WrappedRuntimeException(RuntimeException e) {
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154 super(e);
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155 }
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156 }
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157 }