Robust/src/Tests/WebServerSocket.java

   1 public class WebServerSocket extends Socket {
   2         // Websocket flag
   3         flag LogPending;
   4         flag WritePending;
   5         flag TransPending;
   6         flag WebInitialize;
   7
   8         //Filename requested by the client
   9         String filename;
  10         String[] parsed;
  11         String prefix;
  12
  13         //Constructor
  14         public WebServerSocket(){
  15                 parsed = new String[4];
  16         }
  17
  18         //Send the http header for web browser display
  19         public void httpresponse(){
  20                 StringBuffer header = new StringBuffer("HTTP/1.0 200 OK\n");
  21                 header.append("Content-type: text/html\n");
  22                 header.append("\n\n");
  23                 String temp_str = new String(header);
  24                 write(temp_str.getBytes());
  25                 return;
  26
  27         }
  28
  29         // Send the html file , read from file one byte at a time
  30         public void sendfile() {
  31                 StringBuffer req_file = new StringBuffer("./Tests/htmlfiles/");
  32                 req_file.append(filename);
  33                 String filepath = new String(req_file);
  34                 FileInputStream def_file = new FileInputStream(filepath);
  35                 int status = def_file.getfd();//Checks if the file is present in
  36                                               //current directory
  37                 httpresponse();
  38                 if (status == -1){
  39                         StringBuffer response = new StringBuffer("404: not found: ");//Send 404 error if
  40                                                                                      // file not found
  41                         response.append(filename);
  42                         String buffer = new String(response);
  43                         write(buffer.getBytes());
  44                         def_file.close();
  45                         return;
  46                 }
  47                 byte buf[] = new byte[16];
  48                 int ret;
  49
  50                 while ((ret = def_file.read(buf)) > 0) {// Read from file and write
  51                                                         // one byte at a time into the socket
  52                         byte tosend[] = new byte[ret];
  53                         for (int i = 0; i < ret; i++) {
  54                                 tosend[i] = buf[i];
  55                         }
  56                         write(tosend);
  57                         //String str = new String(tosend);
  58                 }
  59                 def_file.close();
  60         }
  61
  62         //Read the client request and extract the filename from it
  63         public boolean clientrequest(){
  64                 byte b1[] = new byte[1024];
  65                 int numbytes=read(b1);//Read client request from web server socket
  66                 String curr=(new String(b1)).subString(0, numbytes);
  67                 if (prefix!=null) {
  68                     StringBuffer sb=new StringBuffer(prefix);
  69                     sb.append(curr);
  70                     curr=sb.toString();
  71                 }
  72                 prefix=curr;
  73                 if(prefix.indexOf("\r\n\r\n")>=0) {
  74
  75                     int index = prefix.indexOf('/');//Parse the GET client request to find filename
  76                     int end = prefix.indexOf('H');
  77                     filename = prefix.subString((index+1), (end-1));
  78                     System.printString("\n");
  79                     return true;
  80                 }
  81                 return false;
  82         }
  83
  84         // Parse  for the prefix in the client request
  85         // This is helpful to find if the prefix is a special transaction
  86         public boolean checktrans(){
  87                 if (filename.startsWith("trans") == true) {
  88                         return true;
  89                 } else {
  90                         return false;
  91                 }
  92         }
  93
  94         //Parse for the substrings in the filename and use it to obtain the
  95         //kind of operation, name of item, quantity of item, price of item
  96         //e.g. trans_add_car_2_10000 is the filename
  97         //store in the parsed[] string , add,car,2,1000
  98         public int parseTransaction(){
  99                 int start = filename.indexOf('_');
 100                 String s = filename.subString(start+1);
 101
 102                 if (s.startsWith("add")==true){
 103                         System.printString("DEBUG > ADD\n");
 104                         int i1 = s.indexOf('_');
 105                         parsed[0] = new String(s.subString(0,i1));
 106
 107                         String s1 = s.subString(i1+1);
 108                         int i2 = s1.indexOf('_');
 109                         parsed[1] = new String(s1.subString(0,i2));
 110
 111                         String s2 = s1.subString(i2+1);
 112                         int i3 = s2.indexOf('_');
 113                         parsed[2] = new String(s2.subString(0,i3));
 114
 115                         String s3 = s2.subString(i3+1);
 116                         parsed[3] = s3;
 117
 118                         return 0;
 119
 120                 }
 121                 if (s.startsWith("buy")==true){
 122                         System.printString("DEBUG > BUY\n");
 123                         int i1 = s.indexOf('_');
 124                         parsed[0] = s.subString(0,i1);
 125
 126                         String s1 = s.subString(i1+1);
 127                         int i2 = s1.indexOf('_');
 128                         parsed[1] = s1.subString(0,i2);
 129
 130                         String s2 = s1.subString(i2+1);
 131                         parsed[2] = s2;
 132
 133                         parsed[3] = "";
 134
 135                         return 1;
 136                 }
 137                 if (s.startsWith("inventory")==true){
 138                         System.printString("DEBUG > INVENTORY\n");
 139                         return 2;
 140
 141                 }
 142                 // Error transaction
 143                 return -1;
 144         }
 145 }