annotate src/goodjava/rpc/RpcCon.java @ 1474:13cbce740e1e

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author Franklin Schmidt <fschmidt@gmail.com>
date Fri, 17 Apr 2020 21:53:09 -0600
parents 59fd2e8b1b9d
children aaac1d29edea
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rev   line source
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1 package goodjava.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 goodjava.parser.ParseException;
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11 import goodjava.json.JsonParser;
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12 import goodjava.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 boolean readSome = false;
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22
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23 RpcCon(Socket socket)
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24 throws RpcError
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25 {
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26 try {
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27 this.socket = socket;
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28 this.in = socket.getInputStream();
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29 this.out = socket.getOutputStream();
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30 } catch(IOException e) {
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31 close();
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32 throw new RpcError(e);
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33 }
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34 }
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35
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36 public void close()
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37 throws RpcError
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38 {
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39 try {
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40 socket.close();
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41 } catch(IOException e) {
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42 throw new RpcError(e);
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43 }
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44 }
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45
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46 public boolean isClosed() {
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47 return socket.isClosed();
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48 }
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49
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50 void write(InputStream in,long lenIn,List list)
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51 throws RpcError
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52 {
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53 if( in != null )
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54 list.add(0,lenIn);
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55 String json = new JsonToString().toString(list);
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56 byte[] aJson = json.getBytes(StandardCharsets.UTF_8);
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57 int len = aJson.length;
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58 byte[] a = new byte[4+len];
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59 a[0] = (byte)(len >>> 24);
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60 a[1] = (byte)(len >>> 16);
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61 a[2] = (byte)(len >>> 8);
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62 a[3] = (byte)(len >>> 0);
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63 System.arraycopy(aJson,0,a,4,len);
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64 try {
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65 out.write(a);
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66 if( in != null ) {
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67 a = new byte[8192];
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68 long total = 0;
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69 int n;
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70 while( (n=in.read(a)) != -1 ) {
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71 out.write(a,0,n);
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72 total += n;
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73 }
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74 if( total != lenIn ) {
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75 close();
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76 throw new RpcError("InputStream wrong length "+total+" when should be "+lenIn);
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77 }
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78 }
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79 } catch(IOException e) {
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80 close();
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81 throw new RpcError(e);
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82 }
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83 }
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84
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85 List readJson()
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86 throws RpcError
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87 {
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88 try {
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89 if( inBinary != null ) {
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90 inBinary.close();
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91 inBinary = null;
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92 lenBinary = -1;
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93 }
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94 readSome = false;
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95 byte[] a = new byte[4];
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96 readAll(a);
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97 int len = 0;
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98 for( byte b : a ) {
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99 len <<= 8;
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100 len |= b&0xFF;
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101 }
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102 a = new byte[len];
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103 readAll(a);
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104 String json = new String(a,StandardCharsets.UTF_8);
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105 List list = (List)JsonParser.parse(json);
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106 if( list.get(0) instanceof Long ) {
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107 lenBinary = (Long)list.remove(0);
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108 inBinary = new FixedLengthInputStream(in,lenBinary);
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109 }
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110 return list;
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111 } catch(IOException e) {
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112 close();
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113 throw new RpcError(e);
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114 } catch(ParseException e) {
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115 close();
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116 throw new RpcError(e);
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117 }
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118 }
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119
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120 private void readAll(final byte[] a) throws IOException {
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121 int total = 0;
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122 int n;
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123 while( total < a.length ){
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124 n = in.read( a, total, a.length-total );
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125 if( n == -1 )
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126 throw new EOFException();
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127 readSome = true;
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128 total += n;
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129 }
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130 }
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131
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132 }