/********************************************************
* Copyright (C) 2008 Course Scheduler Team
*
* This program is free software; you can redistribute it and/or modify it under the terms of
* the GNU General Public License as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with this program;
* if not, write to:
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330,
* Boston, MA 02111-1307 USA
********************************************************/
/********************************************************
* Course Scheduler
* File: ClientHttpRequest.java
*
* Contains classes:
*
* ClientHttpRequest
*
* Purpose: Sends POST HTTP requests with various
* form data including files.
*
* Author: Vlad Patryshev
* Version: 1.0
********************************************************/
package Scheduler; // declare member of scheduler package
/*******************************************************************************
* Declare imports: too many to list
******************************************************************************/
import java.net.URLConnection;
import java.net.URL;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.io.File;
import java.io.InputStream;
import java.util.Random;
import java.io.OutputStream;
import java.io.FileInputStream;
import java.util.Iterator;
/*******************************************************************************
* Class ClientHttpRequest
*
* Purpose: Sends POST HTTP requests with various form data including files.
*
* Author: Vlad Patryshev Version: 1.0
******************************************************************************/
@SuppressWarnings( { "unchecked", "unused", "static-access" })
public class ClientHttpRequest {
/***************************************************************************
* UPDATE SERIAL VERSION IN VERSION WHEN THIS FILE CHANGES
**************************************************************************/
protected final static long versionID = 2008043000002L;
URLConnection connection;
OutputStream os = null;
Map cookies = new HashMap();
protected void connect() throws IOException {
if (os == null)
os = connection.getOutputStream();
}
protected void write(char c) throws IOException {
connect();
os.write(c);
}
protected void write(String s) throws IOException {
connect();
os.write(s.getBytes());
}
protected void newline() throws IOException {
connect();
write("\r\n");
}
protected void writeln(String s) throws IOException {
connect();
write(s);
newline();
}
private static Random random = new Random();
protected static String randomString() {
return Long.toString(random.nextLong(), 36);
}
String boundary = "---------------------------" + randomString()
+ randomString() + randomString();
private void boundary() throws IOException {
write("--");
write(boundary);
}
/**
* Creates a new multipart POST HTTP request on a freshly opened
* URLConnection
*
* @param connection
* an already open URL connection
* @throws IOException
*/
public ClientHttpRequest(URLConnection connection) throws IOException {
this.connection = connection;
connection.setDoOutput(true);
connection.setRequestProperty("Content-Type",
"multipart/form-data; boundary=" + boundary);
}
/**
* Creates a new multipart POST HTTP request for a specified URL
*
* @param url
* the URL to send request to
* @throws IOException
*/
public ClientHttpRequest(URL url) throws IOException {
this(url.openConnection());
}
/**
* Creates a new multipart POST HTTP request for a specified URL string
*
* @param urlString
* the string representation of the URL to send request to
* @throws IOException
*/
public ClientHttpRequest(String urlString) throws IOException {
this(new URL(urlString));
}
private void postCookies() {
StringBuffer cookieList = new StringBuffer();
for (Iterator i = cookies.entrySet().iterator(); i.hasNext();) {
Map.Entry entry = (Map.Entry) (i.next());
cookieList.append(entry.getKey().toString() + "="
+ entry.getValue());
if (i.hasNext()) {
cookieList.append("; ");
}
}
if (cookieList.length() > 0) {
connection.setRequestProperty("Cookie", cookieList.toString());
}
}
/**
* adds a cookie to the requst
*
* @param name
* cookie name
* @param value
* cookie value
* @throws IOException
*/
public void setCookie(String name, String value) throws IOException {
cookies.put(name, value);
}
/**
* adds cookies to the request
*
* @param cookies
* the cookie "name-to-value" map
* @throws IOException
*/
public void setCookies(Map cookies) throws IOException {
if (cookies == null)
return;
this.cookies.putAll(cookies);
}
/**
* adds cookies to the request
*
* @param cookies
* array of cookie names and values (cookies[2*i] is a name,
* cookies[2*i + 1] is a value)
* @throws IOException
*/
public void setCookies(String[] cookies) throws IOException {
if (cookies == null)
return;
for (int i = 0; i < cookies.length - 1; i += 2) {
setCookie(cookies[i], cookies[i + 1]);
}
}
private void writeName(String name) throws IOException {
newline();
write("Content-Disposition: form-data; name=\"");
write(name);
write('"');
}
/**
* adds a string parameter to the request
*
* @param name
* parameter name
* @param value
* parameter value
* @throws IOException
*/
public void setParameter(String name, String value) throws IOException {
boundary();
writeName(name);
newline();
newline();
writeln(value);
}
private static void pipe(InputStream in, OutputStream out)
throws IOException {
byte[] buf = new byte[500000];
int nread;
int navailable;
int total = 0;
synchronized (in) {
while ((nread = in.read(buf, 0, buf.length)) >= 0) {
out.write(buf, 0, nread);
total += nread;
}
}
out.flush();
in.close();
buf = null;
}
/**
* adds a file parameter to the request
*
* @param name
* parameter name
* @param filename
* the name of the file
* @param is
* input stream to read the contents of the file from
* @throws IOException
*/
public void setParameter(String name, String filename, InputStream is)
throws IOException {
boundary();
writeName(name);
write("; filename=\"");
write(filename);
write('"');
newline();
write("Content-Type: ");
String type = connection.guessContentTypeFromName(filename);
if (type == null)
type = "application/octet-stream";
writeln(type);
newline();
pipe(is, os);
newline();
}
/**
* adds a file parameter to the request
*
* @param name
* parameter name
* @param file
* the file to upload
* @throws IOException
*/
public void setParameter(String name, File file) throws IOException {
setParameter(name, file.getPath(), new FileInputStream(file));
}
/**
* adds a parameter to the request; if the parameter is a File, the file is
* uploaded, otherwise the string value of the parameter is passed in the
* request
*
* @param name
* parameter name
* @param object
* parameter value, a File or anything else that can be
* stringified
* @throws IOException
*/
public void setParameter(String name, Object object) throws IOException {
if (object instanceof File) {
setParameter(name, (File) object);
} else {
setParameter(name, object.toString());
}
}
/**
* adds parameters to the request
*
* @param parameters
* "name-to-value" map of parameters; if a value is a file, the
* file is uploaded, otherwise it is stringified and sent in the
* request
* @throws IOException
*/
public void setParameters(Map parameters) throws IOException {
if (parameters == null)
return;
for (Iterator i = parameters.entrySet().iterator(); i.hasNext();) {
Map.Entry entry = (Map.Entry) i.next();
setParameter(entry.getKey().toString(), entry.getValue());
}
}
/**
* adds parameters to the request
*
* @param parameters
* array of parameter names and values (parameters[2*i] is a
* name, parameters[2*i + 1] is a value); if a value is a file,
* the file is uploaded, otherwise it is stringified and sent in
* the request
* @throws IOException
*/
public void setParameters(Object[] parameters) throws IOException {
if (parameters == null)
return;
for (int i = 0; i < parameters.length - 1; i += 2) {
setParameter(parameters[i].toString(), parameters[i + 1]);
}
}
/**
* posts the requests to the server, with all the cookies and parameters
* that were added
*
* @return input stream with the server response
* @throws IOException
*/
public InputStream post() throws IOException {
boundary();
writeln("--");
os.close();
return connection.getInputStream();
}
/**
* posts the requests to the server, with all the cookies and parameters
* that were added before (if any), and with parameters that are passed in
* the argument
*
* @param parameters
* request parameters
* @return input stream with the server response
* @throws IOException
* @see setParameters
*/
public InputStream post(Map parameters) throws IOException {
setParameters(parameters);
return post();
}
/**
* posts the requests to the server, with all the cookies and parameters
* that were added before (if any), and with parameters that are passed in
* the argument
*
* @param parameters
* request parameters
* @return input stream with the server response
* @throws IOException
* @see setParameters
*/
public InputStream post(Object[] parameters) throws IOException {
setParameters(parameters);
return post();
}
/**
* posts the requests to the server, with all the cookies and parameters
* that were added before (if any), and with cookies and parameters that are
* passed in the arguments
*
* @param cookies
* request cookies
* @param parameters
* request parameters
* @return input stream with the server response
* @throws IOException
* @see setParameters
* @see setCookies
*/
public InputStream post(Map cookies, Map parameters) throws IOException {
setCookies(cookies);
setParameters(parameters);
return post();
}
/**
* posts the requests to the server, with all the cookies and parameters
* that were added before (if any), and with cookies and parameters that are
* passed in the arguments
*
* @param cookies
* request cookies
* @param parameters
* request parameters
* @return input stream with the server response
* @throws IOException
* @see setParameters
* @see setCookies
*/
public InputStream post(String[] cookies, Object[] parameters)
throws IOException {
setCookies(cookies);
setParameters(parameters);
return post();
}
/**
* post the POST request to the server, with the specified parameter
*
* @param name
* parameter name
* @param value
* parameter value
* @return input stream with the server response
* @throws IOException
* @see setParameter
*/
public InputStream post(String name, Object value) throws IOException {
setParameter(name, value);
return post();
}
/**
* post the POST request to the server, with the specified parameters
*
* @param name1
* first parameter name
* @param value1
* first parameter value
* @param name2
* second parameter name
* @param value2
* second parameter value
* @return input stream with the server response
* @throws IOException
* @see setParameter
*/
public InputStream post(String name1, Object value1, String name2,
Object value2) throws IOException {
setParameter(name1, value1);
return post(name2, value2);
}
/**
* post the POST request to the server, with the specified parameters
*
* @param name1
* first parameter name
* @param value1
* first parameter value
* @param name2
* second parameter name
* @param value2
* second parameter value
* @param name3
* third parameter name
* @param value3
* third parameter value
* @return input stream with the server response
* @throws IOException
* @see setParameter
*/
public InputStream post(String name1, Object value1, String name2,
Object value2, String name3, Object value3) throws IOException {
setParameter(name1, value1);
return post(name2, value2, name3, value3);
}
/**
* post the POST request to the server, with the specified parameters
*
* @param name1
* first parameter name
* @param value1
* first parameter value
* @param name2
* second parameter name
* @param value2
* second parameter value
* @param name3
* third parameter name
* @param value3
* third parameter value
* @param name4
* fourth parameter name
* @param value4
* fourth parameter value
* @return input stream with the server response
* @throws IOException
* @see setParameter
*/
public InputStream post(String name1, Object value1, String name2,
Object value2, String name3, Object value3, String name4,
Object value4) throws IOException {
setParameter(name1, value1);
return post(name2, value2, name3, value3, name4, value4);
}
/**
* posts a new request to specified URL, with parameters that are passed in
* the argument
*
* @param parameters
* request parameters
* @return input stream with the server response
* @throws IOException
* @see setParameters
*/
public static InputStream post(URL url, Map parameters) throws IOException {
return new ClientHttpRequest(url).post(parameters);
}
/**
* posts a new request to specified URL, with parameters that are passed in
* the argument
*
* @param parameters
* request parameters
* @return input stream with the server response
* @throws IOException
* @see setParameters
*/
public static InputStream post(URL url, Object[] parameters)
throws IOException {
return new ClientHttpRequest(url).post(parameters);
}
/**
* posts a new request to specified URL, with cookies and parameters that
* are passed in the argument
*
* @param cookies
* request cookies
* @param parameters
* request parameters
* @return input stream with the server response
* @throws IOException
* @see setCookies
* @see setParameters
*/
public static InputStream post(URL url, Map cookies, Map parameters)
throws IOException {
return new ClientHttpRequest(url).post(cookies, parameters);
}
/**
* posts a new request to specified URL, with cookies and parameters that
* are passed in the argument
*
* @param cookies
* request cookies
* @param parameters
* request parameters
* @return input stream with the server response
* @throws IOException
* @see setCookies
* @see setParameters
*/
public static InputStream post(URL url, String[] cookies,
Object[] parameters) throws IOException {
return new ClientHttpRequest(url).post(cookies, parameters);
}
/**
* post the POST request specified URL, with the specified parameter
*
* @param name
* parameter name
* @param value
* parameter value
* @return input stream with the server response
* @throws IOException
* @see setParameter
*/
public static InputStream post(URL url, String name1, Object value1)
throws IOException {
return new ClientHttpRequest(url).post(name1, value1);
}
/**
* post the POST request to specified URL, with the specified parameters
*
* @param name1
* first parameter name
* @param value1
* first parameter value
* @param name2
* second parameter name
* @param value2
* second parameter value
* @return input stream with the server response
* @throws IOException
* @see setParameter
*/
public static InputStream post(URL url, String name1, Object value1,
String name2, Object value2) throws IOException {
return new ClientHttpRequest(url).post(name1, value1, name2, value2);
}
/**
* post the POST request to specified URL, with the specified parameters
*
* @param name1
* first parameter name
* @param value1
* first parameter value
* @param name2
* second parameter name
* @param value2
* second parameter value
* @param name3
* third parameter name
* @param value3
* third parameter value
* @return input stream with the server response
* @throws IOException
* @see setParameter
*/
public static InputStream post(URL url, String name1, Object value1,
String name2, Object value2, String name3, Object value3)
throws IOException {
return new ClientHttpRequest(url).post(name1, value1, name2, value2,
name3, value3);
}
/**
* post the POST request to specified URL, with the specified parameters
*
* @param name1
* first parameter name
* @param value1
* first parameter value
* @param name2
* second parameter name
* @param value2
* second parameter value
* @param name3
* third parameter name
* @param value3
* third parameter value
* @param name4
* fourth parameter name
* @param value4
* fourth parameter value
* @return input stream with the server response
* @throws IOException
* @see setParameter
*/
public static InputStream post(URL url, String name1, Object value1,
String name2, Object value2, String name3, Object value3,
String name4, Object value4) throws IOException {
return new ClientHttpRequest(url).post(name1, value1, name2, value2,
name3, value3, name4, value4);
}
}