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Savage
NetworkedGraphicsMV3500
Commits
8a8f0c6b
Commit
8a8f0c6b
authored
3 years ago
by
Fisher, Alexander (Alex) (Capt)
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Homework 2 - Final
parent
059c7b7d
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assignments/src/MV3500Cohort2021JulySeptember/homework2/Fisher/FisherServer.java
+116
-115
116 additions, 115 deletions
...ohort2021JulySeptember/homework2/Fisher/FisherServer.java
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116 additions
and
115 deletions
assignments/src/MV3500Cohort2021JulySeptember/homework2/Fisher/FisherServer.java
+
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−
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View file @
8a8f0c6b
package
MV3500Cohort2021JulySeptember.homework2.Fisher
;
import
java.io.BufferedReader
;
import
java.io.IOException
;
import
java.io.InputStream
;
import
java.io.InputStreamReader
;
import
java.io.OutputStream
;
import
java.io.PrintStream
;
import
java.net.InetAddress
;
import
java.net.ServerSocket
;
import
java.net.Socket
;
/**
* Very slightly more complex than example1, further modifying example2. The
* only thing this does differently is introduce a loop into the response, so
* you don't have to restart the program after one response. Also, it prints out
* the socket pair the server sees. Run the program via telnet several times and
* compare the socket pairs.
*
* telnet (nc) localhost 2317
*
* If you're sophisticated you can contact the instructor's computer while
* running this program.
*
* telnet (nc) [ipNumberOfServerLaptop] 2317
*
* and have the instructor display the socket pairs received.
*
* @author adfis
*/
public
class
FisherServer
{
/**
* @param args command-line arguments
*/
public
static
void
main
(
String
[]
args
)
{
try
{
// ServerSocket waits for a connection from a client.
// Notice that it is outside the loop; ServerSocket
// needs to be made only once.
System
.
out
.
println
(
"FisherServer has started..."
);
// it helps debugging to put this on console first
ServerSocket
serverSocket
=
new
ServerSocket
(
2317
);
OutputStream
os
;
PrintStream
ps
;
InetAddress
localAddress
,
remoteAddress
;
int
localPort
,
remotePort
;
InputStream
is
;
InputStreamReader
isr
;
BufferedReader
br
;
int
serverLoopCount
=
1
;
// Server is up and waiting (i.e. "blocked" or paused)
// Loop, infinitely, waiting for client connections.
// Stop the program somewhere else.
while
(
serverLoopCount
<=
10
)
{
// block until connected to a client
try
(
Socket
clientConnectionSocket
=
serverSocket
.
accept
())
{
// Now hook everything up (i.e. set up the streams), Java style:
os
=
clientConnectionSocket
.
getOutputStream
();
ps
=
new
PrintStream
(
os
);
ps
.
println
(
"Why did the chicken cross the road?"
);
// this gets sent back to client!
// Print some information locally about the Socket connection.
// This includes the port and IP numbers on both sides (the socket pair).
localAddress
=
clientConnectionSocket
.
getLocalAddress
();
remoteAddress
=
clientConnectionSocket
.
getInetAddress
();
localPort
=
clientConnectionSocket
.
getLocalPort
();
remotePort
=
clientConnectionSocket
.
getPort
();
// My socket pair connection looks like this, to localhost:
// Socket pair: (( /0:0:0:0:0:0:0:1, 2317 ), ( /0:0:0:0:0:0:0:1, 54876 ))
// Socket pair: (( /0:0:0:0:0:0:0:1, 2317 ), ( /0:0:0:0:0:0:0:1, 54881 ))
// Why is the first IP/port the same, while the second set has different ports?
System
.
out
.
println
(
"FisherServer socket pair showing host name, address, port:"
);
System
.
out
.
println
(
" (( "
+
localAddress
.
getHostName
()
+
"="
+
localAddress
.
getHostAddress
()
+
", "
+
localPort
+
" ), ( "
+
remoteAddress
.
getHostName
()
+
"="
+
remoteAddress
.
getHostAddress
()
+
", "
+
remotePort
+
" ))"
);
is
=
clientConnectionSocket
.
getInputStream
();
isr
=
new
InputStreamReader
(
is
);
br
=
new
BufferedReader
(
isr
);
if
(
localAddress
.
getHostName
().
equals
(
localAddress
.
getHostAddress
())
||
remoteAddress
.
getHostName
().
equals
(
remoteAddress
.
getHostAddress
()))
{
System
.
out
.
println
(
" note HostName matches address if host has no DNS name"
);
}
// Notice the use of flush() and try w/ resources. Without
// the try w/ resources the Socket object may stay open for
// a while after the client has stopped needing this
// connection. try w/ resources explicitly ends the connection.
serverLoopCount
++;
ps
.
flush
();
// like it or not, you're outta here!
}
}
}
catch
(
IOException
e
)
{
System
.
err
.
println
(
"Problem with FisherServer networking: "
+
e
);
// Provide more helpful information to user if exception occurs due to running twice at one time
if
(
e
instanceof
java
.
net
.
BindException
)
{
System
.
err
.
println
(
"*** Be sure to stop any other running instances of programs using this port!"
);
}
}
}
}
package
MV3500Cohort2021JulySeptember.homework2.Fisher
;
import
java.io.BufferedReader
;
import
java.io.IOException
;
import
java.io.InputStream
;
import
java.io.InputStreamReader
;
import
java.io.OutputStream
;
import
java.io.PrintStream
;
import
java.net.InetAddress
;
import
java.net.ServerSocket
;
import
java.net.Socket
;
/**
* Very slightly more complex than example1, further modifying example2. The
* only thing this does differently is introduce a loop into the response, so
* you don't have to restart the program after one response. Also, it prints out
* the socket pair the server sees. Run the program via telnet several times and
* compare the socket pairs.
*
* telnet (nc) localhost 2317
*
* If you're sophisticated you can contact the instructor's computer while
* running this program.
*
* telnet (nc) [ipNumberOfServerLaptop] 2317
*
* and have the instructor display the socket pairs received.
*
* @author adfis
*/
public
class
FisherServer
{
/**
* @param args command-line arguments
*/
public
static
void
main
(
String
[]
args
)
{
try
{
// ServerSocket waits for a connection from a client.
// Notice that it is outside the loop; ServerSocket
// needs to be made only once.
System
.
out
.
println
(
"FisherServer has started..."
);
// it helps debugging to put this on console first
ServerSocket
serverSocket
=
new
ServerSocket
(
2317
);
OutputStream
os
;
PrintStream
ps
;
InetAddress
localAddress
,
remoteAddress
;
int
localPort
,
remotePort
;
InputStream
is
;
InputStreamReader
isr
;
BufferedReader
br
;
int
serverLoopCount
=
1
;
// Server is up and waiting (i.e. "blocked" or paused)
// Loop, infinitely, waiting for client connections.
// Stop the program somewhere else.
// Made a loop counter for server to stop after 10 pings with client
while
(
serverLoopCount
<=
10
)
{
// block until connected to a client
try
(
Socket
clientConnectionSocket
=
serverSocket
.
accept
())
{
// Now hook everything up (i.e. set up the streams), Java style:
os
=
clientConnectionSocket
.
getOutputStream
();
ps
=
new
PrintStream
(
os
);
ps
.
println
(
"Why did the chicken cross the road?"
);
// this gets sent back to client!
// Print some information locally about the Socket connection.
// This includes the port and IP numbers on both sides (the socket pair).
localAddress
=
clientConnectionSocket
.
getLocalAddress
();
remoteAddress
=
clientConnectionSocket
.
getInetAddress
();
localPort
=
clientConnectionSocket
.
getLocalPort
();
remotePort
=
clientConnectionSocket
.
getPort
();
// My socket pair connection looks like this, to localhost:
// Socket pair: (( /0:0:0:0:0:0:0:1, 2317 ), ( /0:0:0:0:0:0:0:1, 54876 ))
// Socket pair: (( /0:0:0:0:0:0:0:1, 2317 ), ( /0:0:0:0:0:0:0:1, 54881 ))
// Why is the first IP/port the same, while the second set has different ports?
System
.
out
.
println
(
"FisherServer socket pair showing host name, address, port:"
);
System
.
out
.
println
(
" (( "
+
localAddress
.
getHostName
()
+
"="
+
localAddress
.
getHostAddress
()
+
", "
+
localPort
+
" ), ( "
+
remoteAddress
.
getHostName
()
+
"="
+
remoteAddress
.
getHostAddress
()
+
", "
+
remotePort
+
" ))"
);
is
=
clientConnectionSocket
.
getInputStream
();
isr
=
new
InputStreamReader
(
is
);
br
=
new
BufferedReader
(
isr
);
if
(
localAddress
.
getHostName
().
equals
(
localAddress
.
getHostAddress
())
||
remoteAddress
.
getHostName
().
equals
(
remoteAddress
.
getHostAddress
()))
{
System
.
out
.
println
(
" note HostName matches address if host has no DNS name"
);
}
// Notice the use of flush() and try w/ resources. Without
// the try w/ resources the Socket object may stay open for
// a while after the client has stopped needing this
// connection. try w/ resources explicitly ends the connection.
serverLoopCount
++;
ps
.
flush
();
// like it or not, you're outta here!
}
}
}
catch
(
IOException
e
)
{
System
.
err
.
println
(
"Problem with FisherServer networking: "
+
e
);
// Provide more helpful information to user if exception occurs due to running twice at one time
if
(
e
instanceof
java
.
net
.
BindException
)
{
System
.
err
.
println
(
"*** Be sure to stop any other running instances of programs using this port!"
);
}
}
}
}
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