basic java net client returns 400












0














The following code has been copied out for Horstmann's, Big Java Early Objects 6th edition - Chapter 23.3. The only modification is the package, added by eclipse.



The code:



package zipCodeScrapper;
import java.io.InputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.Socket;
import java.util.Scanner;

public class client {
public static void main(String args) throws IOException {
// Get command-line arguments
String host;
String resource;

if (args.length == 2) {
host = args[0];
resource = args[1];
} else {
System.out.println("Getting / from horstmann.com");
host = "horstmann.com";
resource = "/";
}

// Open socket
final int HTTP_PORT = 80;
try (Socket s = new Socket(host, HTTP_PORT)) {

// Get streams
InputStream instream = s.getInputStream();
OutputStream outstream = s.getOutputStream();

// Turn streams into scanners and writers
Scanner in = new Scanner(instream);
PrintWriter out = new PrintWriter(outstream);

// Send command
String command = "GET " + resource + " HTTP/1.1n" + "Host: " + host + "nn";
out.print(command);
out.flush();

while (in.hasNextLine()) {
String input = in.nextLine();
System.out.println(input);
}
}
}
}


The code receives a 400 Bad Request. I have tried replacing the host and resources with other values, however I continue to get error 400.










share|improve this question


















  • 1




    The line terminator in HTTP is defined as rn, not just n.
    – user207421
    Nov 23 '18 at 7:04
















0














The following code has been copied out for Horstmann's, Big Java Early Objects 6th edition - Chapter 23.3. The only modification is the package, added by eclipse.



The code:



package zipCodeScrapper;
import java.io.InputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.Socket;
import java.util.Scanner;

public class client {
public static void main(String args) throws IOException {
// Get command-line arguments
String host;
String resource;

if (args.length == 2) {
host = args[0];
resource = args[1];
} else {
System.out.println("Getting / from horstmann.com");
host = "horstmann.com";
resource = "/";
}

// Open socket
final int HTTP_PORT = 80;
try (Socket s = new Socket(host, HTTP_PORT)) {

// Get streams
InputStream instream = s.getInputStream();
OutputStream outstream = s.getOutputStream();

// Turn streams into scanners and writers
Scanner in = new Scanner(instream);
PrintWriter out = new PrintWriter(outstream);

// Send command
String command = "GET " + resource + " HTTP/1.1n" + "Host: " + host + "nn";
out.print(command);
out.flush();

while (in.hasNextLine()) {
String input = in.nextLine();
System.out.println(input);
}
}
}
}


The code receives a 400 Bad Request. I have tried replacing the host and resources with other values, however I continue to get error 400.










share|improve this question


















  • 1




    The line terminator in HTTP is defined as rn, not just n.
    – user207421
    Nov 23 '18 at 7:04














0












0








0







The following code has been copied out for Horstmann's, Big Java Early Objects 6th edition - Chapter 23.3. The only modification is the package, added by eclipse.



The code:



package zipCodeScrapper;
import java.io.InputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.Socket;
import java.util.Scanner;

public class client {
public static void main(String args) throws IOException {
// Get command-line arguments
String host;
String resource;

if (args.length == 2) {
host = args[0];
resource = args[1];
} else {
System.out.println("Getting / from horstmann.com");
host = "horstmann.com";
resource = "/";
}

// Open socket
final int HTTP_PORT = 80;
try (Socket s = new Socket(host, HTTP_PORT)) {

// Get streams
InputStream instream = s.getInputStream();
OutputStream outstream = s.getOutputStream();

// Turn streams into scanners and writers
Scanner in = new Scanner(instream);
PrintWriter out = new PrintWriter(outstream);

// Send command
String command = "GET " + resource + " HTTP/1.1n" + "Host: " + host + "nn";
out.print(command);
out.flush();

while (in.hasNextLine()) {
String input = in.nextLine();
System.out.println(input);
}
}
}
}


The code receives a 400 Bad Request. I have tried replacing the host and resources with other values, however I continue to get error 400.










share|improve this question













The following code has been copied out for Horstmann's, Big Java Early Objects 6th edition - Chapter 23.3. The only modification is the package, added by eclipse.



The code:



package zipCodeScrapper;
import java.io.InputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.Socket;
import java.util.Scanner;

public class client {
public static void main(String args) throws IOException {
// Get command-line arguments
String host;
String resource;

if (args.length == 2) {
host = args[0];
resource = args[1];
} else {
System.out.println("Getting / from horstmann.com");
host = "horstmann.com";
resource = "/";
}

// Open socket
final int HTTP_PORT = 80;
try (Socket s = new Socket(host, HTTP_PORT)) {

// Get streams
InputStream instream = s.getInputStream();
OutputStream outstream = s.getOutputStream();

// Turn streams into scanners and writers
Scanner in = new Scanner(instream);
PrintWriter out = new PrintWriter(outstream);

// Send command
String command = "GET " + resource + " HTTP/1.1n" + "Host: " + host + "nn";
out.print(command);
out.flush();

while (in.hasNextLine()) {
String input = in.nextLine();
System.out.println(input);
}
}
}
}


The code receives a 400 Bad Request. I have tried replacing the host and resources with other values, however I continue to get error 400.







java sockets http-status-code-400






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Nov 23 '18 at 6:59









Alexander McNultyAlexander McNulty

349214




349214








  • 1




    The line terminator in HTTP is defined as rn, not just n.
    – user207421
    Nov 23 '18 at 7:04














  • 1




    The line terminator in HTTP is defined as rn, not just n.
    – user207421
    Nov 23 '18 at 7:04








1




1




The line terminator in HTTP is defined as rn, not just n.
– user207421
Nov 23 '18 at 7:04




The line terminator in HTTP is defined as rn, not just n.
– user207421
Nov 23 '18 at 7:04












1 Answer
1






active

oldest

votes


















1














Firstly , read this documentations. RFC p1 and RFC2 p2



Line separator of HTTP is not a n . It must be rn . For more read this thread ;



What is line breaker in HTTP?






share|improve this answer





















  • in case this isn't clear to anyone who has the same problem, every n in my "command" string should be replace by rn
    – Alexander McNulty
    Nov 23 '18 at 7:21










  • thanks for the answer, and +1 for the suggested reading.
    – Alexander McNulty
    Nov 23 '18 at 7:22











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1 Answer
1






active

oldest

votes








1 Answer
1






active

oldest

votes









active

oldest

votes






active

oldest

votes









1














Firstly , read this documentations. RFC p1 and RFC2 p2



Line separator of HTTP is not a n . It must be rn . For more read this thread ;



What is line breaker in HTTP?






share|improve this answer





















  • in case this isn't clear to anyone who has the same problem, every n in my "command" string should be replace by rn
    – Alexander McNulty
    Nov 23 '18 at 7:21










  • thanks for the answer, and +1 for the suggested reading.
    – Alexander McNulty
    Nov 23 '18 at 7:22
















1














Firstly , read this documentations. RFC p1 and RFC2 p2



Line separator of HTTP is not a n . It must be rn . For more read this thread ;



What is line breaker in HTTP?






share|improve this answer





















  • in case this isn't clear to anyone who has the same problem, every n in my "command" string should be replace by rn
    – Alexander McNulty
    Nov 23 '18 at 7:21










  • thanks for the answer, and +1 for the suggested reading.
    – Alexander McNulty
    Nov 23 '18 at 7:22














1












1








1






Firstly , read this documentations. RFC p1 and RFC2 p2



Line separator of HTTP is not a n . It must be rn . For more read this thread ;



What is line breaker in HTTP?






share|improve this answer












Firstly , read this documentations. RFC p1 and RFC2 p2



Line separator of HTTP is not a n . It must be rn . For more read this thread ;



What is line breaker in HTTP?







share|improve this answer












share|improve this answer



share|improve this answer










answered Nov 23 '18 at 7:09









drownydrowny

1,620314




1,620314












  • in case this isn't clear to anyone who has the same problem, every n in my "command" string should be replace by rn
    – Alexander McNulty
    Nov 23 '18 at 7:21










  • thanks for the answer, and +1 for the suggested reading.
    – Alexander McNulty
    Nov 23 '18 at 7:22


















  • in case this isn't clear to anyone who has the same problem, every n in my "command" string should be replace by rn
    – Alexander McNulty
    Nov 23 '18 at 7:21










  • thanks for the answer, and +1 for the suggested reading.
    – Alexander McNulty
    Nov 23 '18 at 7:22
















in case this isn't clear to anyone who has the same problem, every n in my "command" string should be replace by rn
– Alexander McNulty
Nov 23 '18 at 7:21




in case this isn't clear to anyone who has the same problem, every n in my "command" string should be replace by rn
– Alexander McNulty
Nov 23 '18 at 7:21












thanks for the answer, and +1 for the suggested reading.
– Alexander McNulty
Nov 23 '18 at 7:22




thanks for the answer, and +1 for the suggested reading.
– Alexander McNulty
Nov 23 '18 at 7:22


















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