JavaServletProgramming.PDF

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1 ( ) from Yongwoo s Park Java Servlet Programming from Yongwoo s Park 1

2 Java Servlet Programming from Yongwoo s Park 2

3 (SERVLET) 4 11 (GENERICSERVLET ) Servlet 4 GenericServlet 5 ServletRequest 7 ServletResponse 9 ServletInputStream 9 ServletOutputStream 10 (GenericServlet) 11 ServletConfig 14 ServletContext HTTP (HTTPSERVLET ) HttpServlet 18 HttpServletRequest 19 HttpServletResponse 20 HTTP Cookie 38 HttpSession 44 HttpSessionBindingListener 45 HttpSessionBindingEvent HttpUtils SMTP(Send Mail Transfer Protocol) 59 Java Servlet Programming from Yongwoo s Park 3

4 from Yongwoo s Park javalangobject javaioinputstream javaxservletgenericservlet javaiooutputstream javaxservletservletinputstream javaxservletservletoutputstream javaxservletservlet javaxservletservletconfig javaxservletservletcontext javaxservletservletrequest javaxservletservletresponse javaxservletrequestdispatcher javaxservletsinglethreadmodel 1 javaxservlet HTTP(Hyper-Text Transfer Protocol),, Servlet, javaxservletgenericservlet (generic Servlet) javaxservlethttphttpservlet HTTP Servlet, (life-cycle), :, init Java Servlet Programming from Yongwoo s Park 4

5 : :, destroy,, finalize interface Servlet { WWW Request Response init(config) service(req, res) destroy() Load MyServletclass getservletconfig() getservletinfo() Unload 2,, (startup) getservletconfig (author), (version), (copyright) getservletinfo Servlet, void init(servletconfig config):,, void service(servletrequest req, ServletResponse res): void destroy():, ServletConfig getservletconfig(): / ServletConfig javalangstring getservletinfo(): (author), (version), (copyright) Java Servlet Programming from Yongwoo s Park 5

6 GenericServlet, (Web site) HTTP, HttpServlet GenericServlet Servlet ServletConfig, GenericServlet HttpServlet, GenericServlet HttpServlet, Servlet GenericServlet init destroy (lifecycle) ServletConfig,, GenericServlet ServletContext log, MyServlet extends GenericServlet { Request ServletRequest req WWW WWW ServletResponse res Response ServletInputStream ServletOutputStream service(req, res) init(config) destroy() 3, getservletinfo, - (sevlet-wide) init destroy GenericServlet, void init(): void init(servletconfig config):,, abstract void service(servletrequest req, ServletResponse res):, GenericServlet Java Servlet Programming from Yongwoo s Park 6

7 void destroy():, javalangstring getinitparameter(javalangstring name): javautilenumeration getinitparameternames(): enumeration ServletConfig getservletconfig(): / ServletConfig ServletContext getservletcontext(): ServletContext javalangstring getservletinfo(): (author), (version), (copyright) void log(javalangstring msg): void log(javalangstring message, javalangthrowable t): ServletRequest, ServletRequest, HttpServletRequest HTTP MIME, MIME, MIME, getreader, getinpuetstream, Multipart MIME Java Servlet Programming from Yongwoo s Park 7

8 ServletRequest, javautilenumeration getattributenames(): Enumeration javalangobject getattribute(javalangstring name) : void setattribute(javalangstring key, javalangobject o): javalangstring getcharacterencoding(): int getcontentlength():, 1 javalangstring getcontenttype(): MIME null javautilenumeration getparameternames(): Enumeration javalangstring getparameter(javalangstring name): javalangstring[] getparametervalues(javalangstring name): (list) (choicebox), javaiobufferedreader getreader(): BufferedReader ServletInputStream getinputstream():, ServletInputStream javalangstring getprotocol(): HTTP/11 major/minor javalangstring getremoteaddr(): IP(Internet Protocol) javalangstring getremotehost(): javalangstring getscheme(): http, https, ftp javalangstring getservername(): int getserverport(): javalangstring getrealpath(javalangstring path): API 21 ServletContextgetRealPath(javalangString) Java Servlet Programming from Yongwoo s Park 8

9 ServletResponse, MIME, ServletResponse, ServletResponse service ServletRequest, MIME ServletResponse getoutputstream ServletOutputStream, MIME getwriter PrintWriter, ServletResponse, javalangstring getcharacterencoding(): MIME ServletOutputStream getoutputstream(): ServletOutputStream javaioprintwriter getwriter(): PrintWriter void setcontentlength(int len): void setcontenttype(javalangstring type): ServletInputStream readline, (input stream) HTTP POST PUT ServletInputStream, ServletRequestgetInputStream ServletInputStream ServletInputStream, service, ServletInputStream Java Servlet Programming from Yongwoo s Park 9 ServletOutputStream service

10 , ServletInputStream javaioinputstreamread ServletInputStream, int readline(byte[] b, int off, int len):, 1 ServletOutputStream, (output stream) ServletInputStream ServletResponsegetOutputStream ServletOutputStream ServletInputStream ServletOutputStream,, ServletOutputStream, javaiooutputstream write(int) ServletOutputStream, void print(boolean b): b void print(char c): c void print(double d): d void print(float f): f void print(int i): i void print(long l): l void print(javalangstring s): s void println(): CRLF(carriage return-line feed) void println(boolean b): b CRLF void println(char c): c CRLF void println(double d): d CRLF void println(float f): f CRLF void println(int i): i CRLF void println(long l): l CRLF void println(javalangstring s): s CRLF Java Servlet Programming from Yongwoo s Park 10

11 , Setvlet GenericServlet, init, service, destroy, getservletinfo getservletconfig javaappletapplet, init, start, stop, destroy, paint, getappletinfo, (GenericServlet) import javaio*; import javautilenumeration; import javaxservlet*; public class HelloGenericServlet extends GenericServlet { static String initialname; public void init(servletconfig config) throws ServletException { superinit(config); initialname=configgetinitparameter("name"); public void service(servletrequest req, ServletResponse res) throws ServletException, IOExc eption { PrintWriter out=resgetwriter(); String name=reqgetparameter("name"); outprintln("hello, "+initialname+":init, "+name+":req"); outprintln("attribute names in this request:"); Enumeration e = reqgetattributenames(); while(ehasmoreelements()) { String key =(String)enextElement(); Object value = reqgetattribute(key); outprintln(" " + key + " = " + value); outprintln(); outprintln(" Protocol: " + reqgetprotocol()); outprintln(" Scheme: " + reqgetscheme()); outprintln(" Server Name: " + reqgetservername()); outprintln(" Server Port: " + reqgetserverport()); outprintln(" Remote Addr: " + reqgetremoteaddr()); outprintln(" Remote Host: " + reqgetremotehost()); outprintln("character Encoding: " + reqgetcharacterencoding()); outprintln(" Content Length: " + reqgetcontentlength()); outprintln(" Content Type: " + reqgetcontenttype()); Java Servlet Programming from Yongwoo s Park 11

12 outprintln(); outprintln("parameter names in this request"); e = reqgetparameternames(); while(ehasmoreelements()) { String key =(String)enextElement(); String[] values = reqgetparametervalues(key); outprint(" " + key + " = "); for(int i=0;i<valueslength;i++) { outprint(values[i] + " "); outprintln(); /* * File: d:\java\jsdk21\webpages\web-inf\servletsproperties hellocode=hellogenericservlet helloinitparams=name=yongwoo's Park */ < 1 HelloGenericServletjava>,,, HTML Java Servlet Programming from Yongwoo s Park 12

13 HTML (GenericServlet) HTML import javaio*; import javautilenumeration; import javaxservlet*; public class HelloGenericServlet2 extends GenericServlet { public void service(servletrequest req, ServletResponse res) throws ServletException, IOException { ressetcontenttype("text/html; charset=euc-kr"); PrintWriter out=resgetwriter(); String name=reqgetparameter("name"); outprintln("<html>"); outprintln("<head><title>hello, "+name+"</title></head>"); outprintln("<body>"); outprintln("<h1>hello, "+name+"</h1>"); outprintln("<h2> "+reqgetparameter(" ")+" </H2>"); outprintln("</body>"); outprintln("</html>"); /* * File: d:\java\jsdk21\webpages\web-inf\servletsproperties hello2code=hellogenericservlet2 hello2initparams= */ < 2 HelloGenericServlet2java> Java Servlet Programming from Yongwoo s Park 13

14 ServletResponse setcontenttype, ( ) MIME text/html, HTML Content Type: text/html; charset=euc-kr, MIME, ISO , name/value, ServletContext ServletConfig, javalangstring getinitparameter(javalangstring name): name/value, javautilenumeration getinitparameternames(): Enumeration ServletContext getservletcontext(): ServletContext MIME Java Servlet Programming from Yongwoo s Park 14

15 , ServletContext, ServletConfiggetServletContext () ServletContext, (multiple) (virtual), ServletContext ServletContext ServletConfig, ServletgetServletConfig ServletConfig ServletContext, javalangobject getattribute(javalangstring name): javautilenumeration getattributenames(): Enumeration void removeattribute(javalangstring name): (contect) void setattribute(javalangstring name, javalangobject object): (contect) ServletContext getcontext(javalangstring uripath): URL ServletContext int getmajorversion(): API major version int getminorversion(): API minor version javalangstring getmimetype(javalangstring file): MIME javalangstring getrealpath(javalangstring path): RequestDispatcher getrequestdispatcher(javalangstring urlpath): wrapper RequestDispatcher javaneturl getresource(javalangstring path): javaioinputstream getresourceasstream(javalangstring path): javautilenumeration getservlets(): API 20 void log(javalangexception exception, javalangstring msg) : API 21 log(string message, Throwable throwable) void log(javalangstring msg): void log(javalangstring message, javalangthrowable throwable): Java Servlet Programming from Yongwoo s Park 15

16 javalangstring getserverinfo(): Servlet getservlet(javalangstring name): API 21 javautilenumeration getservletnames(): API 21 (GenericServlet) /* $Id: SnoopServletjava,v /03/17 01:17:20 duncan Exp $ * */ import javaioioexception; import javautilenumeration; import javaxservlet*; import javaxservlethttp*; /** James Duncan Davidson <duncan@engsuncom> */ public class SnoopGenericServlet extends GenericServlet { public void service(servletrequest req, ServletResponse res) throws ServletException, IOException { ServletConfig config = getservletconfig(); ServletOutputStream out = resgetoutputstream(); ressetcontenttype("text/html; charset=8859-1"); outprintln("<html>"); outprintln("<head><title>generic Snoop Servlet</title></head>"); outprintln("<body>"); outprintln("<h3>generic Snoop Servlet</H3><br>"); outprintln("init Parameters<br>"); Enumeration e = configgetinitparameternames(); while(ehasmoreelements()) { String key =(String)enextElement(); String value = configgetinitparameter(key); outprintln("\t" + key + " = " + value + "\t"); outprintln("<br>"); outprintln("server Info:"+getServletConfig()getServletContext()getServerInfo()); outprintln("<br>"); outprintln("context attributes:"); ServletContext context = configgetservletcontext(); e = contextgetattributenames(); while(ehasmoreelements()) { String key =(String)enextElement(); Object value = contextgetattribute(key); Java Servlet Programming from Yongwoo s Park 16

17 outprintln("\t" + key + " = " + value + "<br>"); outprintln("java Server: "+contextgetmajorversion()+""+contextgetminorversion()); outprintln("<br>"); outprintln("attributes<br>"); e = reqgetattributenames(); while(ehasmoreelements()) { String key =(String)enextElement(); Object value = reqgetattribute(key); outprintln("\t" + key + " = " + value + "<br>"); outprintln("<br>"); /* * outprintln("parameters<br>"); e = reqgetparameternames(); while(ehasmoreelements()) { String key =(String)enextElement(); String[] values = reqgetparametervalues(key); outprint("\t" + key + " = "); for(int i=0;i<valueslength;i++) { outprint(values[i] + " "); outprintln("<br>"); outprintln("</body>"); outprintln("</html>"); # $Id: servletsproperties,v /04/02 02:04:22 duncan Exp $ snoop2code=snoopgenericservlet snoop2initparams=initarg1=foo,initarg2=bar */ Java Servlet Programming from Yongwoo s Park 17

18 < 3 SnoopGenericServletjava> javalangobject javaioinputstream javaxservletgenericservlet javaiooutputstream javaxservletservletinputstream javaxservletservletoutputstream javaxservletservlet javaxservletservletconfig javaxservletservletcontext javaxservletservletrequest javaxservletservletresponse javaxservletrequestdispatcher javaxservletsinglethreadmodel 4 javaxservlethttp HttpServlet HTTP HTTP,, HttpServlet doget : HTTP GET dopost : HTTP POST doput : HTTP PUT dodelete : HTTP DELETE init destroy :, init, destroy getservletinfo: Java Servlet Programming from Yongwoo s Park 18

19 GET Request MyServlet extends HttpServlet { Response POST Request Response PUT Request Response WWW HttpServletRequest req HttpServletResponse res doget(req, res) dopost(req, res) doput(req, res) dodelete(req, res) ServletInputStream service( ) ServletOutputStream 5 HTTP ServletRequest HttpServletRequest HTTP HTTP HTTP HttpServlet service HttpServletRequest HttpServletRequest HTTP, javalangstring getauthtype(): (authentication scheme), "BASIC" "SSL" Cookie[] getcookies(): long getdateheader(javalangstring name): Date long javalangstring getheader(javalangstring name): javautilenumeration getheadernames(): Enumeration int getintheader(javalangstring name): javalangstring getmethod(): GET, POST, PUT, DELETE (request method) Java Servlet Programming from Yongwoo s Park 19

20 javalangstring getpathinfo(): URL javalangstring getpathtranslated(): servlet (query string), javalangstring getquerystring(): javalangstring getremoteuser():, HTTP (authentication), javalangstring getrequestedsessionid(): (session) ID javalangstring getrequesturi(): HTTP URL javalangstring getservletpath(): URL HttpSession getsession():, HttpSession getsession(boolean create):, create boolean isrequestedsessionidfromcookie(): ID boolean isrequestedsessionidfromurl(): API 21 isrequestedsessionidfromurl() boolean isrequestedsessionidfromurl(): ID URL boolean isrequestedsessionidvalid(): HttpSessionContext HTTP HTTP HttpServletResponse HttpServletResponse service HTTP,, HTTP HttpServletResponse, HttpServletResponse, void addcookie(cookie cookie): Java Servlet Programming from Yongwoo s Park 20

21 boolean containsheader(javalangstring name): javalangstring encoderedirecturl(javalangstring url): encoderedirecturl(string url) javalangstring encoderedirecturl(javalangstring url): URL sendredirect javalangstring encodeurl(javalangstring url) : encodeurl(string url) javalangstring encodeurl(javalangstring url): URL ID void senderror(int sc): void senderror(int sc, javalangstring msg): void sendredirect(javalangstring location): URL void setdateheader(javalangstring name, long date): void setheader(javalangstring name, javalangstring value) : void setintheader(javalangstring name, int value): void setstatus(int sc): void setstatus(int sc, javalangstring sm): HTTP (GenericServlet) GET POST, import javaio*; import javaxservlet*; import javaxservlethttp*; public class HelloHttpServlet extends HttpServlet { public void doget(httpservletrequest req, HttpServletResponse res) throws IOException, ServletException { ressetcontenttype("text/html; charset=euc-kr"); PrintWriter out = resgetwriter(); Java Servlet Programming from Yongwoo s Park 21

22 outprintln("<html>"); outprintln("<body>"); outprintln("<head>"); outprintln("<title>hello</title>"); outprintln("</head>"); outprintln("<body>"); outprintln("<h1> "+reqgetparameter("name")+"!</h1>"); outprintln("<h3> "+reqgetparameter("job")+" </H3>"); outprintln("</body>"); outprintln("</html>"); public void dopost(httpservletrequest req, HttpServletResponse res) throws IOException, ServletException { ressetcontenttype("text/html; charset=euc-kr"); PrintWriter out = resgetwriter(); outprintln("<html>"); outprintln("<body>"); outprintln("<head>"); outprintln("<title>hello</title>"); outprintln("</head>"); outprintln("<body>"); outprintln("<h1> "+toksc5601(reqgetparameter("name"))+"!</h1>"); outprintln("<h3> "+toksc5601(reqgetparameter("job"))+" </H3>"); outprintln("</body>"); outprintln("</html>"); public static String toksc5601(string str) throws UnsupportedEncodingException { if(str == null) { return(null); return(new String(strgetBytes("8859_1"), "KSC5601")); /* * 1) GET 1) POST Java Servlet Programming from Yongwoo s Park 22

23 */ < 4 HelloHttpServletjava>, HTTP (GenericServlet) POST HTML <HTML> <HEAD> <META http-equiv="content-type" content="text/html; charset=euc-kr"> <TITLE>Form Test</TITLE> </HEAD> <BODY> <H1>POST </H1> <P> <FORM action=" method="post"> : <input type="text" name="name" size=16><br> : <input type="text" name="job" size=40><br> <input type="submit" value=" "> </FORM> </BODY> </HTML> /* * */ Java Servlet Programming from Yongwoo s Park 23

24 < 5 HelloHttpServlethtml> HTTP,, HTML, HTML HTTP HTML <HTML> <HEAD> <TITLE>File Upload</TITLE> </HEAD> <BODY> <H1> </H1> <P> <FORM method="post" action=" enctype=multipart/form-data> : <input type="text" name="name" size=16><br> : <input type="file" name="binary"><br> <input type="submit" value=" "> </FORM> </BODY> </HTML> /* * */ < 6 FileUploadEchoServlethtml> Java Servlet Programming from Yongwoo s Park 24

25 , <FORM> <FORM> method="post" POST, GET, POST action=" enctype=multipart/form-data,, multipart/form-data : <input type="file" name="binary"> - input file,, HTML, HTTP, HTTP import javaio*; import javautil*; import javaxservlet*; import javaxservlethttp*; public class FileUploadEchoServlet extends HttpServlet { public void dopost(httpservletrequest req, HttpServletResponse res) throws ServletException, IOException { ressetcontenttype("text/html; charset=euc-kr"); PrintWriter out = resgetwriter(); outprintln("<html>"); outprintln("<body>"); outprintln("<head>"); outprintln("<title>file Upload Result</TITLE>"); outprintln("</head>"); outprintln("<body>"); outprintln("<h2> </H2>"); outprintln(" Content type: ["+reqgetcontenttype()+"]<br>"); outprintln("content length: ["+reqgetcontentlength()+"]<br>"); Java Servlet Programming from Yongwoo s Park 25

26 InputStreamReader isr = new InputStreamReader(reqgetInputStream(), "EUC-KR"); BufferedReader br = new BufferedReader(isr); for(string line;(line=brreadline())!=null;) { outprintln(line+"<br>"); outclose(); /* * outprintln("</body>"); outprintln("</html>"); */ < 7 FileUploadEchoServletjava>,, HTML, HTTP, HTTP HTML HTML <HTML> <BODY> <HEAD> <TITLE>File Upload Result</TITLE> </HEAD> <BODY> Java Servlet Programming from Yongwoo s Park 26

27 <H2> </H2> Content type: [multipart/form-data; boundary= cfc2164e07da]<BR> Content length: [10558]<BR> cfc2164e07da<BR> Content-Disposition: form-data; name="name"<br> <BR> <BR> cfc2164e07da<BR> Content-Disposition: form-data; name="binary"; filename="d:\temp\bigpenguingif"<br> Content-Type: image/gif<br> <BR> cf1124e07da--<BR> 6, HTML,, Content Type reqgetcontenttype MIME, MIME multipart/form-data?? multipart/form-data; boundary= cfc2164e07da cf1124e07da enctype=multipart/form-data (name) (binary), Content-Disposition: (name= ), (filename= ), MIME,,?? Content-Disposition: form-data; name="name" (name),, name name?? Content-Disposition: form-data; name="binary"; filename="d:\temp \bigpenguingif" (ninary), name binary, Java Servlet Programming from Yongwoo s Park 27

28 filename "D:\Temp\bigpenguingif"?? Content-Type: image/gif MIME MIME image/gif,,, cf1124e07da-- -, ID --,, HTTP HTML HTTP HTML <HTML> <HEAD> <TITLE>File Upload</TITLE> </HEAD> <BODY> <H1> </H1> <P> <FORM method="post" action=" FileUploadServlet " enctype=multipart/form-data> : <input type="text" name="name" size=16><br> : <input type="file" name="binary"><br> <input type="submit" value=" "> </FORM> </BODY> </HTML> /* * Java Servlet Programming from Yongwoo s Park 28

29 */ < 8 FileUploadServlethtml> import javaio*; import javautil*; import javaxservlet*; import javaxservlethttp*; public class FileUploadServlet extends HttpServlet { public void dopost(httpservletrequest req, HttpServletResponse res) throws ServletException, IOException { ressetcontenttype("text/html; charset=euc-kr"); PrintWriter out = resgetwriter(); /* OutputStreamWriter osw = new OutputStreamWriter(resgetOutputStream(); PrintWriter out = new PrintWriter(osw, "KSC5601") ); */ try { MultipartRequest multi = new MultipartRequest(req, "", 5*1024*1024); outprintln("<html>"); outprintln("<head><title>file Upload</TITLE></HEAD>"); outprintln("<body>"); outprintln("<h1> </H1>"); outprintln("<h3>params:</h3>"); outprintln("<pre>"); Enumeration params = multigetparameternames(); while(paramshasmoreelements()) { String name = (String)paramsnextElement(); String value = multigetparameter(name); outprintln(name + " = " + value); outprintln("</pre>"); outprintln("<h3>files:</h3>"); outprintln("<pre>"); Enumeration files = multigetfilenames(); while(fileshasmoreelements()) { Java Servlet Programming from Yongwoo s Park 29

30 String name = (String)filesnextElement(); String filename = multigetfilesystemname(name); String type = multigetcontenttype(name); File f = multigetfile(name); outprintln("name: " + name); outprintln("filename: " + filename); outprintln("type: " + type); if(f!= null) { outprintln("length: " + flength()); outprintln(); outprintln("</pre>"); catch(exception e) { outprintln("<pre>"); eprintstacktrace(out); outprintln("</pre>"); outprintln("</body></html>"); /* * */ < 9 FileUploadServletjava> import javaio*; import javautil*; import javaxservlet*; public class MultipartRequest { Java Servlet Programming from Yongwoo s Park 30

31 private static final int DEFAULT_MAX_POST_SIZE=1024*1024; // 1 Mega private ServletRequest req; private File dir; private int maxlen; private Hashtable parameters = new Hashtable(); // name - value private Hashtable files = new Hashtable(); // name - UploadedFile public MultipartRequest(ServletRequest req, String uploaddir) throws IOException { this(req, uploaddir, DEFAULT_MAX_POST_SIZE); public MultipartRequest(ServletRequest req, String uploaddir, int maxlen) throws IOException { // Sanity check values if(req == null) { throw new IllegalArgumentException("request cannot be null"); if(uploaddir == null) { throw new IllegalArgumentException("saveDirectory cannot be null"); if(maxlen <= 0) { throw new IllegalArgumentException("maxPostSize must be positive"); // Save the request, dir, and max size thisreq = req; dir = new File(uploadDir); thismaxlen = maxlen; // Check savedirectory is truly a directory if(!dirisdirectory()) { throw new IllegalArgumentException("Not a directory: " + uploaddir); // Check savedirectory is writable if(!dircanwrite()) { throw new IllegalArgumentException("Not writable: " + uploaddir); // Now parse the request saving data to "parameters" and "files"; // write the file contents to the savedirectory readrequest(); public Enumeration getparameternames() { return parameterskeys(); public Enumeration getfilenames() { return fileskeys(); public String getparameter(string name) { try { String param =(String)parametersget(name); if(""equals(param)) { return(null); return(param); catch(exception e) { return(null); Java Servlet Programming from Yongwoo s Park 31

32 public String getfilesystemname(string name) { try { UploadedFile file =(UploadedFile)filesget(name); return(filegetfilesystemname()); // may be null catch(exception e) { return null; public String getcontenttype(string name) { try { UploadedFile file =(UploadedFile)filesget(name); return(filegetcontenttype()); // may be null catch(exception e) { return(null); public File getfile(string name) { try { UploadedFile file =(UploadedFile)filesget(name); return(filegetfile()); // may be null catch(exception e) { return(null); protected void readrequest() throws IOException { String type = reqgetcontenttype(); if((type == null) (!typetolowercase()startswith("multipart/form-data"))) { throw new IOException("Posted content type isn't multipart/form-data"); // Check the content length to prevent denial of service attacks int len = reqgetcontentlength(); if(len > maxlen) { throw new IOException("Content length: "+len+", Limit: "+maxlen); // Get the boundary string; it's included in the content type // Should look something like " " String boundary = extractboundary(type); if(boundary == null) { throw new IOException("Separation boundary was not specified"); // Construct the special input stream we'll read from MultipartInputStreamHandler in = new MultipartInputStreamHandler(reqgetInputStream(), boundary, len); // Read the first line, should be the first boundary String line = inreadline(); if(line == null) { throw new IOException("Corrupt form data: premature ending"); Java Servlet Programming from Yongwoo s Park 32

33 // Verify that the line is the boundary if(!linestartswith(boundary)) { throw new IOException("Corrupt form data: no leading boundary"); // Now that we're just beyond the first boundary, loop over each part boolean done = false; while(!done) { done = readnextpart(in, boundary); protected boolean readnextpart(multipartinputstreamhandler in, String boundary) throws IOException { // Read the first line, should look like this: // content-disposition: form-data; name="field1"; filename="file1txt" String line = inreadline(); if(line == null) { // No parts left, we're done return(true); // Parse the content-disposition line String[] dispinfo = extractdispositioninfo(line); String disposition = dispinfo[0]; String name = dispinfo[1]; String filename = dispinfo[2]; // Now onto the next line This will either be empty // or contain a Content-Type and then an empty line line = inreadline(); if(line == null) { // No parts left, we're done return(true); // Get the content type, or null if none specified String contenttype = extractcontenttype(line); if(contenttype!= null) { // Eat the empty line line = inreadline(); if((line == null) (linelength() > 0)) { // line should be empty throw new IOException("Malformed line after content type: " + line); else { // Assume a default content type contenttype = "application/octet-stream"; // Now, finally, we read the content(end after reading the boundary) if(filename == null) { // This is a parameter String value = readparameter(in, boundary); parametersput(name, value); else { // This is a file readandsavefile(in, boundary, filename); if("unknown"equals(filename)) { filesput(name, new UploadedFile(null, null, null)); else { filesput(name, new UploadedFile(dirtoString(), filename, contenttype)); Java Servlet Programming from Yongwoo s Park 33

34 return(false); // there's more to read protected String readparameter(multipartinputstreamhandler in, String boundary) throws IOException { StringBuffer sbuf = new StringBuffer(); String line; while((line = inreadline())!= null) { if(linestartswith(boundary)) { break; sbufappend(line + "\r\n"); // add the \r\n in case there are many lines if(sbuflength() == 0) { return(null); // nothing read sbufsetlength(sbuflength() - 2); // cut off the last line's \r\n return(sbuftostring()); // no URL decoding needed protected void readandsavefile(multipartinputstreamhandler in, String boundary, String filename) throws IOException { File f = new File(dir + Fileseparator + filename); FileOutputStream fos = new FileOutputStream(f); BufferedOutputStream out = new BufferedOutputStream(fos, 8 * 1024); // 8K byte[] bbuf = new byte[100*1024]; // 100K int result; String line; // ServletInputStreamreadLine() has the annoying habit of // adding a \r\n to the end of the last line // Since we want a byte-for-byte transfer, we have to cut those chars boolean rnflag = false; while((result = inreadline(bbuf, 0, bbuflength))!= -1) { // Check for boundary if(result > 2 && bbuf[0] == '-' && bbuf[1] == '-') { // quick pre-check line = new String(bbuf, 0, result, "ISO "); if(linestartswith(boundary)) { break; // Are we supposed to write \r\n for the last iteration? if(rnflag) { outwrite('\r'); outwrite('\n'); rnflag = false; // Write the buffer, postpone any ending \r\n if((result>=2)&&(bbuf[result-2]=='\r')&&(bbuf[result-1]=='\n')) { outwrite(bbuf, 0, result - 2); // skip the last 2 chars rnflag = true; // make a note to write them on the next iteration else { outwrite(bbuf, 0, result); outflush(); Java Servlet Programming from Yongwoo s Park 34

35 outclose(); fosclose(); // Extracts and returns the boundary token from a line // private String extractboundary(string line) { int index = lineindexof("boundary="); if(index == -1) { return null; String boundary = linesubstring(index + 9); // 9 for "boundary=" // The real boundary is always preceeded by an extra "--" boundary = "--" + boundary; return boundary; // Extracts and returns disposition info from a line, as a String array // with elements: disposition, name, filename Throws an IOException // if the line is malformatted // private String[] extractdispositioninfo(string line) throws IOException { // Return the line's data as an array: disposition, name, filename String[] retval = new String[3]; // Convert the line to a lowercase string without the ending \r\n // Keep the original line for error messages and for variable names String origline = line; line = origlinetolowercase(); // Get the content disposition, should be "form-data" int start = lineindexof("content-disposition: "); int end = lineindexof(";"); if(start == -1 end == -1) { throw new IOException("Content disposition corrupt: " + origline); String disposition = linesubstring(start + 21, end); if(!dispositionequals("form-data")) { throw new IOException("Invalid content disposition: " + disposition); // Get the field name start = lineindexof("name=\"", end); // start at last semicolon end = lineindexof("\"", start + 7); // skip name=\" if(start == -1 end == -1) { throw new IOException("Content disposition corrupt: " + origline); String name = origlinesubstring(start + 6, end); // Get the filename, if given String filename = null; start = lineindexof("filename=\"", end + 2); // start after name end = lineindexof("\"", start + 10); // skip filename=\" if(start!= -1 && end!= -1) { // note the!= filename = origlinesubstring(start + 10, end); // The filename may contain a full path Cut to just the filename int slash = Mathmax(filenamelastIndexOf('/'), filenamelastindexof('\\')); if(slash > -1) { filename = filenamesubstring(slash + 1); // past last slash Java Servlet Programming from Yongwoo s Park 35

36 if(""equals(filename)) { filename = "unknown"; // sanity check // Return a String array: disposition, name, filename retval[0] = disposition; retval[1] = name; retval[2] = filename; return(retval); // Extracts and returns the content type from a line, or null if the // line was empty Throws an IOException if the line is malformatted // private String extractcontenttype(string line) throws IOException { String contenttype = null; // Convert the line to a lowercase string String origline = line; line = origlinetolowercase(); // Get the content type, if any if(linestartswith("content-type")) { int start = lineindexof(" "); if(start == -1) { throw new IOException("Content type corrupt: " + origline); contenttype = linesubstring(start + 1); else if(linelength()!= 0) { // no content type, so should be empty throw new IOException("Malformed line after disposition: " + origline); return contenttype; // A class to hold information about an uploaded file // class UploadedFile { private String dir; private String filename; private String type; UploadedFile(String dir, String filename, String type) { thisdir = dir; thisfilename = filename; thistype = type; public String getcontenttype() { return(type); public String getfilesystemname() { return(filename); public File getfile() { if(dir == null filename == null) { Java Servlet Programming from Yongwoo s Park 36

37 return(null); else { return(new File(dir + Fileseparator + filename)); // A class to aid in reading multipart/form-data from a ServletInputStream // It keeps track of how many bytes have been read and detects when the // Content-Length limit has been reached This is necessary since some // servlet engines are slow to notice the end of stream // class MultipartInputStreamHandler { ServletInputStream in; String boundary; int totalexpected; int totalread = 0; byte[] buf = new byte[8 * 1024]; public MultipartInputStreamHandler(ServletInputStream in, String boundary, int totalexpected) { this in = in; thisboundary = boundary; thistotalexpected = totalexpected; // Reads the next line of input Returns null to indicate the end // of stream // public String readline() throws IOException { StringBuffer sbuf = new StringBuffer(); int result; String line; do { result = thisreadline(buf, 0, buflength); // thisreadline() does += if(result!= -1) { sbufappend(new String(buf, 0, result)); //, "ISO ")); while(result == buflength); // loop only if the buffer was filled if(sbuflength() == 0) { return(null); // nothing read, must be at the end of stream sbufsetlength(sbuflength() - 2); // cut off the trailing \r\n return(sbuftostring()); // A pass-through to ServletInputStreamreadLine() that keeps track // of how many bytes have been read and stops reading when the // Content-Length limit has been reached // public int readline(byte b[], int off, int len) throws IOException { if(totalread >= totalexpected) { return(-1); else { int result = inreadline(b, off, len); if(result > 0) { totalread += result; Java Servlet Programming from Yongwoo s Park 37

38 return(result); public static String toksc5601(string str) throws UnsupportedEncodingException { if(str == null) { return(null); return(new String(strgetBytes("8859_1"), "KSC5601")); < 10 MultipartRequestjava> Cookie,,,, (commnent), (path and domain qualifiers), (maximum age), (version number) HTTP-Response Header Set-Cookie Cookie, Set-Cookie: NAME=VALUE; expires=date; path=path; domain=domain_name; secure 7, NAME=VALUE, Java Servlet Programming from Yongwoo s Park 38

39 Set-Cookie: NAME=VALUE; expires=date;,,,,, WINDOW_ROOT\\Profiles\\ ID\\Cookie domain=domain_name;, path=path; Secure, secure SSL, HTTP HttpServletResponse addcookie, HttpServletResponse addcookie HTTP (HTTP response headers) 20, 4KB HTTP (HTTP request headers), HttpServletRequest getcookies Cookie, Netscape 0 RFC Cookie, Cookie(javalangString name, javalangstring value): javalangstring getcomment(): javalangstring getdomain(): int getmaxage(): javalangstring getname(): javalangstring getpath(): boolean getsecure(): javalangstring getvalue(): Java Servlet Programming from Yongwoo s Park 39

40 int getversion(): void setcomment(javalangstring purpose): version 0 void setdomain(javalangstring pattern): void setmaxage(int expiry): void setpath(javalangstring uri): void setsecure(boolean flag): HTTPS SSL void setvalue(javalangstring newvalue): void setversion(int v):,,, <HTML> <HEAD> <META http-equiv="content-type" content="text/html; charset=euc-kr"> <TITLE>Login</TITLE> </HEAD> <BODY> <H1> </H1> <P> <FORM action=" method="post"> USER: <input type=text name=user><br> PASS: <input type=password name=pass><br> <input type=submit value="login"> </FORM> </BODY> </HTML> /* * Java Servlet Programming from Yongwoo s Park 40

41 */ < 11 Loginhtml> import javaio*; import javautil*; import javaxservlet*; import javaxservlethttp*; public class LoginServlet extends HttpServlet { public void dopost(httpservletrequest req, HttpServletResponse res) throws ServletException, IOException { ressetcontenttype("text/html;charset=euc-kr"); PrintWriter out = resgetwriter(); outprintln("<html>"); outprintln("<body>"); outprintln("<head>"); outprintln("<title>login</title>"); outprintln("</head>"); outprintln("<body>"); String user = reqgetparameter("user"); user = new String(usergetBytes("ISO "), "EUC-KR"); String pass = reqgetparameter("pass"); if(("park"equals(user)) && ("Park"equals(pass))) { Cookie logincookie = new Cookie("BBS-Park", "Login"); Cookie usercookie = new Cookie("Username", user); resaddcookie(logincookie); resaddcookie(usercookie); outprintln("<h1> </H1><BR>"); outprintln("<a HREF=\" "); else { outprintln("<h1> </H1><BR>"); outprintln("<a HREF=\"/Loginhtml\"> "); outprintln("</body>"); outprintln("</html>"); Java Servlet Programming from Yongwoo s Park 41

42 /* * outclose(); */ < 12 LoginServletjava> import javaio*; import javaxservlet*; import javaxservlethttp*; public class StartServiceServlet extends HttpServlet { public void doget(httpservletrequest req, HttpServletResponse res) throws IOException, ServletException { ressetcontenttype("text/html; charset=euc-kr"); PrintWriter out = resgetwriter(); outprintln("<html>"); outprintln("<body>"); outprintln("<head>"); outprintln("<title>hello</title>"); outprintln("</head>"); outprintln("<body>"); int match=0; String user = null; boolean login=false; Cookie[] cookies = reqgetcookies(); if(cookies!= null) { for(int i=0;i<cookieslength;i++) { if(("bbs-park"equals(cookies[i]getname())) && ("Login"equals(cookies[i]getValue()))) { login = true; match++; else if("username"equals(cookies[i]getname())) { user = cookies[i]getvalue(); match++; if(match >= 2) { break; Java Servlet Programming from Yongwoo s Park 42

43 outprintln("<center>"); if(login) { outprintln("<h2> "+user+"!</h2>"); outprintln("<h3> </H3>"); else { outprintln("<h2> </H2><BR>"); outprintln("<a HREF=\"/Loginhtml\"> "); outprintln("</body>"); outprintln("</html>"); /* * public void dopost(httpservletrequest req, HttpServletResponse res) throws IOException, ServletException { doget(req, res); 1) 2) ( ) */ < 13 LoginServletjava> Java Servlet Programming from Yongwoo s Park 43

44 , Loginhtml: HTML LoginServletjava: HTML,, StartServiceServletjava:,, HTML,, HttpSession,,,, ( ),,, ( ), HttpSession (session identifier), (creation time ), (session context) HttpSession, javalangstring getid(): ID long getcreationtime(): January 1, 1970 GMT long getlastaccessedtime(): int getmaxinactiveinterval(): Java Servlet Programming from Yongwoo s Park 44

45 javalangobject getvalue(javalangstring name ): javalangstring[] getvaluenames(): void invalidate():, boolean isnew(): void putvalue(javalangstring name, javalangobject value): void removevalue(javalangstring name): void setmaxinactiveinterval(int interval): HttpSessionBindingListener HttpSessionBindingListener HttpSessionBindingEvent HttpSessionBindingListener void valuebound(httpsessionbindingevent event): void valueunbound(httpsessionbindingevent event): HttpSessionBindingEvent HttpSessionBindingListener, HttpSession putvalue, HttpSession removevalue HttpSessionBindingEvent Java Servlet Programming from Yongwoo s Park 45

46 , HttpSessionBindingEvent(HttpSession session, javalangstring name): javalangstring getname(): HttpSession getsession(): HTTP HTTP, (persistence),,,, HttpSession,,, HTTP import javaio*; import javautil*; import javaxservlet*; import javaxservlethttp*; public class SessionSnoop extends HttpServlet { public void doget(httpservletrequest req, HttpServletResponse res) throws ServletException, IOException { ressetcontenttype("text/html;charset=euc-kr"); PrintWriter out = resgetwriter(); HttpSession session = reqgetsession(true); outprintln("<html>"); outprintln("<body>"); outprintln("<head>"); outprintln("<title>session Snoop</TITLE>"); outprintln("</head>"); Java Servlet Programming from Yongwoo s Park 46

47 outprintln("<body>"); outprintln("<h1>session Snoop</H1>"); Integer count = (Integer)sessiongetValue("SessionSnoopCount"); if(count == null) { count = new Integer(1); else { count = new Integer(countintValue() + 1); sessionputvalue("sessionsnoopcount", count); outprintln(" : "+count+"<br>"); outprintln("<p>"); outprintln("<h3> :</H3>"); String[] names = sessiongetvaluenames(); for(int i=0;i<nameslength;i++) { outprintln(names[i]+": "+sessiongetvalue(names[i])+"<br>"); outprintln("<h3> :</H3>"); outprintln(" ID: " + sessiongetid() + "<BR>"); outprintln(" : " + sessionisnew() + "<BR>"); outprintln(" : " + sessiongetcreationtime()); outprintln("<i>(" + new Date(sessiongetCreationTime()) + ")</I><BR>"); outprintln(" : " + sessiongetlastaccessedtime()); outprintln("<i>(" + new Date(sessiongetLastAccessedTime()) + ")</I><BR>"); outprintln(" ( ): " + reqisrequestedsessionidfromcookie() + "<BR>"); outprintln(" (URL): " + reqisrequestedsessionidfromurl() + "<BR>"); outprintln(" : " + reqisrequestedsessionidvalid() + "<BR>"); outprintln("<a HREF=\""+resencodeURL(reqgetRequestURI())+"\">"); outprintln("url </A>"); /* * outprintln("</body>"); outprintln("</html>"); 1) Java Servlet Programming from Yongwoo s Park 47

48 */ < 14 LoginServletjava> HTTP import javaio*; import javautil*; import javaxservlet*; import javaxservlethttp*; public class SessionSnoop extends HttpServlet { public void doget(httpservletrequest req, HttpServletResponse res) throws ServletException, IOException { ressetcontenttype("text/html;charset=euc-kr"); PrintWriter out = resgetwriter(); HttpSession session = reqgetsession(true); outprintln("<html>"); outprintln("<body>"); outprintln("<head>"); outprintln("<title>session Snoop</TITLE>"); outprintln("</head>"); outprintln("<body>"); outprintln("<h1>session Snoop</H1>"); Integer count = (Integer)sessiongetValue("SessionSnoopCount"); if(count == null) { count = new Integer(1); else { Java Servlet Programming from Yongwoo s Park 48

49 count = new Integer(countintValue() + 1); sessionputvalue("sessionsnoopcount", count); outprintln(" : "+count+"<br>"); outprintln("<p>"); outprintln("<h3> :</H3>"); String[] names = sessiongetvaluenames(); for(int i=0;i<nameslength;i++) { outprintln(names[i]+": "+sessiongetvalue(names[i])+"<br>"); outprintln("<h3> :</H3>"); outprintln(" ID: " + sessiongetid() + "<BR>"); outprintln(" : " + sessionisnew() + "<BR>"); outprintln(" : " + sessiongetcreationtime()); outprintln("<i>(" + new Date(sessiongetCreationTime()) + ")</I><BR>"); outprintln(" : " + sessiongetlastaccessedtime()); outprintln("<i>(" + new Date(sessiongetLastAccessedTime()) + ")</I><BR>"); outprintln(" ( ): " + reqisrequestedsessionidfromcookie() + "<BR>"); outprintln(" (URL): " + reqisrequestedsessionidfromurl() + "<BR>"); outprintln(" : " + reqisrequestedsessionidvalid() + "<BR>"); outprintln("<a HREF=\""+resencodeURL(reqgetRequestURI())+"\">"); outprintln("url </A>"); /* * outprintln("</body>"); outprintln("</html>"); 1) Java Servlet Programming from Yongwoo s Park 49

50 */ < 15 SessionSnoopjava>, HttpSession HttpServletRequest getsession(boolean), boolean HttpSession true HttpSession true HttpSession, isnew, 30, 30,, HttpSession, ( SessionSnopcount), HTTP import javaio*; import javaxservlet*; import javaxservlethttp*; public class ShoppingCartServlet extends HttpServlet { public void doget(httpservletrequest req, HttpServletResponse res) throws ServletException, IOException { ressetcontenttype("text/html;charset=euc-kr"); Java Servlet Programming from Yongwoo s Park 50

51 PrintWriter out = resgetwriter(); HttpSession session = reqgetsession(true); outprintln("<html>"); outprintln("<body>"); outprintln("<head>"); outprintln("<title>park Home Shopping</TITLE>"); outprintln("</head>"); outprintln("<body>"); outprintln("<h1> </H1><BR>"); String shoppingitems[] = { "Mouse", "Keyboard", "Monitor", "Speaker", "CDROM", "Floppy Disk", "Hard Disk", "Network Adapter", "Modem", "VGA Adapter", "Printer", "Case" ; int shoppingchecks[] = { 10000, 10000, , 30000, 70000, 15000, , 50000, 40000, , , ; String shoppingstep = reqgetparameter("shoppingstep"); if("checkout"equals(shoppingstep)) { String[] items = (String[])sessiongetValue("ShorppingCartitems"); if(items == null) { outprintln("<h2> </H2>"); sessionputvalue("shorppingcartcheck", new Integer(0)); else { int check=0; outprintln(" :<BR>"); outprintln("<ul>"); for(int i=0;i<itemslength;i++) { outprintln("<li>"+items[i]); for(int j=0;j<shoppingitemslength;j++) { if(shoppingitems[j]equals(items[i])) { check += shoppingchecks[j]; outprintln("</ul>"); sessionputvalue("shorppingcartcheck", new Integer(check)); Integer i = (Integer)sessiongetValue("ShorppingCartcheck"); outprintln("<h2> "+i+" </H2>"); else { if("additem"equals(shoppingstep)) { String addeditems[] = reqgetparametervalues("addeditems"); if(addeditems == null) { outprintln("<h2> </H2>"); else { String olditems[] = (String[])sessiongetValue("ShorppingCartitems"); String newitems[] = null; int addedcount = 0; if(olditems!= null) { newitems = new String[oldItemslength+addedItemslength]; for(int i=0;i<olditemslength;i++) { newitems[addedcount++] = olditems[i]; else { newitems = new String[addedItemslength]; Java Servlet Programming from Yongwoo s Park 51

52 for(int i=0;i<addeditemslength;i++) { newitems[addedcount++] = addeditems[i]; sessionputvalue("shorppingcartitems", newitems); String[] items = (String[])sessiongetValue("ShorppingCartitems"); if(items == null) { outprintln("<b> </B>"); else { outprintln(" :<BR>"); outprintln("<ul>"); for(int i=0;i<itemslength;i++) { outprintln("<li>"+items[i]); outprintln("</ul>"); outprintln("<form ACTION=\" METHOD=POST>"); outprintln(" <input type=hidden name=shoppingstep value=additem multiple>"); outprintln(" <select name=\"addeditems\" size=4 multiple>"); for(int i=0;i<shoppingitemslength;i++) { outprintln(" <option value=\""+shoppingitems[i]+"\">"+shoppingitems[i]); outprintln(" </select>"); outprintln(" <input type=submit value=\" \">"); outprintln("</form>"); outprintln("<form ACTION=\" METHOD=POST>"); outprintln(" <input type=hidden name=shoppingstep value=checkout multiple>"); outprintln(" <input type=submit value=\" \">"); outprintln("</form>"); outprintln("</body>"); outprintln("</html>"); outclose(); /* * public void dopost(httpservletrequest req, HttpServletResponse res) throws IOException, ServletException { doget(req, res); Java Servlet Programming from Yongwoo s Park 52

53 */ < 16 ShoppingCartServletjava> HTTP, FORM HIDDEN URL, GET, POST POST 8 Java Servlet Programming from Yongwoo s Park 53

54 9, 10 HttpUtils HTTP Java Servlet Programming from Yongwoo s Park 54

55 HttpUtils, HttpUtils(): HttpUtils static javalangstringbuffer getrequesturl(httpservletrequest req): HttpServletRequest URL static javautilhashtable parsepostdata(int len, ServletInputStream in): HTTP POST application/x-www-form-urlencoded MIME HTML static javautilhashtable parsequerystring(javalangstring s):, getrequesturl URL, getquerystring GET HTTP, parsepostdata POST, getquerystring GET = (key) (value) Hashtable, parsepostdata POST = Hashtable,,, HTML FORM CGI,, servletproperties, HTML <HTML> <HEAD><TITLE>GuestBook</TITLE></HEAD> <BODY> <CENTER> Java Servlet Programming from Yongwoo s Park 55

56 <H1> </H1> <FORM action= method=post> <input type=hidden name=function value=write> <center> <table bgcolor=#faeddc cellspacing=0 cellpadding=6> <tr> <td><br><input type=text name=author size=10></td> <td><br><input type=text name=phone size=14></td> </tr> <tr><td colspan=2> <br><input type=text name=title size=40></td></tr></td></tr> <tr><td colspan=2> <br><textarea name=content rows=3 cols=40></textarea></td></tr> <tr> <td>html<br><input type=text name=html size=30></td> <td> <br><input type=text name=e_mail size=30></td> </tr> <tr> <br> <td align=right><input type=reset value= ></td> <td align=left> <input type=submit value= ></td> </tr> </table> </FORM> </BODY> </HTML> /* * */ < 17 GuestBookhtml> Java Servlet Programming from Yongwoo s Park 56

57 import javaio*; import javautil*; import javaxservlet*; import javaxservlethttp*; public class GuestBookServlet extends HttpServlet implements SingleThreadModel { String guestbookpath; public void init(servletconfig config) throws ServletException { superinit(config); guestbookpath = getinitparameter("guestbookpath"); if(guestbookpath == null) { Enumeration initparams = getinitparameternames(); Systemerrprintln(" : "); while(initparamshasmoreelements()) { Systemerrprintln(initParamsnextElement()); Systemerrprintln(" "); throw new UnavailableException (this, "!"); public void doget(httpservletrequest req, HttpServletResponse res) throws ServletException, IOException { ressetcontenttype("text/html; charset=euc-kr"); PrintWriter out = resgetwriter(); outprintln("<html>"); outprintln("<head>"); outprintln("<title>writing</title>"); outprintln("</head>"); outprintln("<body>"); try { String functionstr = reqgetparametervalues("function")[0]; if(functionstrequalsignorecase("write")) { // FileWriter guestbookfile = new FileWriter(guestBookPath, true); // PrintWriter tofile = new PrintWriter(guestBookFile); tofileprintln("<begin>"); TimeZone tz = new SimpleTimeZone(9*60*60*1000, "KST"); //, Date today = new Date(); TimeZonesetDefault(tz); tofileprintln("date: " + todaytostring()); Enumeration values = reqgetparameternames(); // while(valueshasmoreelements()) { String name = (String)valuesnextElement(); String value = reqgetparametervalues(name)[0]; Java Servlet Programming from Yongwoo s Park 57

58 if(namecompareto("submit")!= 0) { tofileprintln(name + ": " + toksc5601(value)); tofileprintln("<end>"); guestbookfileclose(); outprintln("<h1>"); outprintln("success"); outprintln("</h1>"); else { outprintln("<h1>"); outprintln("fail" + functionstr + "" + guestbookpath); outprintln("</h1>"); catch(ioexception e) { // eprintstacktrace(); outprintln("<h1>"); outprintln(" "); outprintln("</h1>"); outprintln("</body>"); outprintln("</html>"); outclose(); public void dopost(httpservletrequest req, HttpServletResponse res) throws IOException, ServletException { doget(req, res); public static String toksc5601( String str ) throws UnsupportedEncodingException { if(str == null) { return(null); return(new String(strgetBytes("8859_1"), "KSC5601")); /* * */ < 18 GuestBookServletjava> Java Servlet Programming from Yongwoo s Park 58

59 servletproperties # $Id: servletsproperties,v /04/02 02:04:22 duncan Exp $ # Define servlets here # <servletname>code=<servletclass> # <servletname>initparams=<name=value>,<name=value> snoopcode=snoopservlet snoopinitparams=initarg1=foo,initarg2=bar snoop2code=snoopgenericservlet snoop2initparams=initarg1=foo,initarg2=bar hellocode=hellogenericservlet helloinitparams=name=yongwoo's Park hello2code=hellogenericservlet2 hello2initparams= jspcode=comsunjspruntimejspservlet # guestbook servlet # # D:\\Java\\jsdk21\\webpages\\guestbook\\GuestBooktxt guestbookcode=guestbookservlet guestbookinitparams=guestbookpath=d:\\java\\jsdk21\\webpages\\guestbook\\guestbooktxt < 19 servletsproperties > <BEGIN> Date: Wed Oct 27 04:00:55 GMT+09: HTML: Author: Title: Phone: 02-22xx-xxxx Content: ~ E_Mail: ywpark@csekonkukackr Function: Write <END> < 20 D:\\Java\\jsdk21\\webpages\\guestbook\\GuestBooktxt > Java Servlet Programming from Yongwoo s Park 59

60 , SMTP(Simple Mail Transfer Protocol), SMTP,,, (SUBJECT), ( ),,, HTML FORM CGI,, servletproperties, HTML <HTML> <HEAD><TITLE>Send Mail</TITLE></HEAD> <BODY> <CENTER> <H1> </H1> <FORM action= method=post> <table bgcolor=#faeddc cellspacing=0 cellpadding=6> <tr> <td> <br><input type=text name=mailfrom size=40></td> <td><br><input type=text name=rtcpto size=40></td> </tr> <tr><td colspan=2> <br><input type=text name=subject size=40></td></tr></td></tr> <tr><td colspan=2> <br><textarea name=body rows=3 cols=60></textarea></td></tr> <tr> <br> <td align=right><input type=reset value= ></td> <td align=left> <input type=submit value= ></td> </tr> </table> </FORM> </BODY> </HTML> Java Servlet Programming from Yongwoo s Park 60

61 /* * */ < 21 SendMailServlethtml> SMTP import javaio*; import javanet*; import javautil*; import javaxservlet*; import javaxservlethttp*; public class SendMailServlet extends HttpServlet implements SingleThreadModel { String smtpserver; PrintStream ps = null; BufferedReader dis = null; public void init(servletconfig config) throws ServletException { superinit(config); smtpserver = getinitparameter("smtpserver"); if(smtpserver == null) { Enumeration initparams = getinitparameternames(); Systemerrprintln(" : "); while(initparamshasmoreelements()) { Systemerrprintln(initParamsnextElement()); Systemerrprintln("SMTP "); Java Servlet Programming from Yongwoo s Park 61

62 throw new UnavailableException (this, "Not given a SMTP server to send a mail!"); public void doget(httpservletrequest req, HttpServletResponse res) throws ServletException, IOException { ressetcontenttype("text/html; charset=euc-kr"); PrintWriter out = resgetwriter(); outprintln("<html>"); outprintln("<head>"); outprintln("<title>send Mail</TITLE>"); outprintln("</head>"); outprintln("<body>"); String END_OF_DATA = "\r\n\r\n"; Socket smtp = null; try { smtp = new Socket(smtpServer, 25); // SMTP 25 OutputStream os = smtpgetoutputstream(); ps = new PrintStream(os); InputStream is = smtpgetinputstream(); dis = new BufferedReader(new InputStreamReader(is)); catch(ioexception e) { Systemoutprintln("Error connecting: " + e); String mailfrom = toksc5601(reqgetparameter("mailfrom")); String rcptto = toksc5601(reqgetparameter("rtcpto")); String subject = toksc5601(reqgetparameter("subject")); String body = toksc5601(reqgetparameter("body")); outprintln("<h1>"); if(mailfrom == null rcptto == null subject == null body == null) { outprintln("mailfrom or rtcpto or subject or body is empty"); else { try { String localhost = InetAddressgetLocalHost()getHostName(); // Local send("helo " + localhost); receive(); send("mail FROM: " + mailfrom); receive(); send("rcpt TO: " + rcptto); receive(); send("data"); receive(); send("subject: " + subject); receive(); send(body+end_of_data); receive(); send("quit"); receive(); smtpclose(); outprintln(" "); catch(ioexception e) { outprintln(" "); outprintln("</h1>"); outprintln("</body>"); outprintln("</html>"); Java Servlet Programming from Yongwoo s Park 62

63 outclose(); void send(string s) throws IOException { psprintln(s); psflush(); Systemoutprintln("Java request: " + s); void receive() throws IOException { String readstr = disreadline(); Systemoutprintln("SMTP response: " + readstr); public void dopost(httpservletrequest req, HttpServletResponse res) throws IOException, ServletException { doget(req, res); public static String toksc5601( String str ) throws UnsupportedEncodingException { if(str == null) { return(null); return(new String(strgetBytes("8859_1"), "KSC5601")); /* * */ < 22 SendMailServletjava> SMTP servletproperties # $Id: servletsproperties,v /04/02 02:04:22 duncan Exp $ # Define servlets here # <servletname>code=<servletclass> # <servletname>initparams=<name=value>,<name=value> Java Servlet Programming from Yongwoo s Park 63