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1118
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1 package luan.lib.rpc;
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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.io.EOFException;
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7 import java.net.Socket;
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8 import java.nio.charset.StandardCharsets;
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9 import java.util.List;
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10 import luan.lib.parser.ParseException;
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11 import luan.lib.json.JsonParser;
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12 import luan.lib.json.JsonToString;
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13
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14
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15 public class RpcCon {
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16 final Socket socket;
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17 final InputStream in;
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18 final OutputStream out;
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19 InputStream inBinary = null;
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20 long lenBinary = -1;
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21
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22 RpcCon(Socket socket) throws IOException {
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23 this.socket = socket;
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24 this.in = socket.getInputStream();
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25 this.out = socket.getOutputStream();
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26 }
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27
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28 public void close()
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29 throws IOException
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30 {
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31 socket.close();
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32 }
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33
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34 public boolean isClosed() {
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35 return socket.isClosed();
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36 }
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37
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38 void write(InputStream in,long lenIn,List list)
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39 throws IOException
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40 {
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41 if( in != null )
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42 list.add(0,lenIn);
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43 String json = JsonToString.toString(list);
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44 byte[] aJson = json.getBytes(StandardCharsets.UTF_8);
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45 int len = aJson.length;
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46 byte[] a = new byte[4+len];
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47 a[0] = (byte)(len >>> 24);
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48 a[1] = (byte)(len >>> 16);
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49 a[2] = (byte)(len >>> 8);
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50 a[3] = (byte)(len >>> 0);
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51 System.arraycopy(aJson,0,a,4,len);
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52 out.write(a);
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53 if( in != null ) {
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54 a = new byte[8192];
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55 long total = 0;
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56 int n;
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57 while( (n=in.read(a)) != -1 ) {
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58 out.write(a,0,n);
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59 total += n;
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60 }
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61 if( total != lenIn )
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62 throw new IOException("InputStream wrong length "+total+" when should be "+lenIn);
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63 }
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64 }
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65
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66 List readJson()
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67 throws IOException
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68 {
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69 if( inBinary != null ) {
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70 inBinary.close();
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71 inBinary = null;
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72 lenBinary = -1;
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73 }
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74 byte[] a = new byte[4];
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75 readAll(a);
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76 int len = 0;
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77 for( byte b : a ) {
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78 len <<= 8;
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79 len |= b&0xFF;
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80 }
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81 a = new byte[len];
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82 readAll(a);
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83 String json = new String(a,StandardCharsets.UTF_8);
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84 List list;
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85 try {
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86 list = (List)JsonParser.parse(json);
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87 } catch(ParseException e) {
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88 throw new IOException(e);
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89 }
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90 if( list.get(0) instanceof Long ) {
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91 lenBinary = (Long)list.remove(0);
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92 inBinary = new FixedLengthInputStream(in,lenBinary);
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93 }
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94 return list;
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95 }
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96
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97 private void readAll(final byte[] a) throws IOException {
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98 int total = 0;
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99 int n;
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100 while( total < a.length ){
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101 n = in.read( a, total, a.length-total );
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102 if( n == -1 )
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103 throw new EOFException();
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104 total += n;
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105 }
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106 }
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107
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108 }
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