Resources for implementing HTTP web server using java

hi ,
Thanks for giving your precious time in reading the message.I want to build a HTTP web server using java,which will run on my machine and I can communicate with it through web browser(IE) using HTTP requests and response.
I know java language, but quite new to network programming.I want to gain enough knowledge on network programming in java.Can you please suggest me good books or any other resources available on the internet for the required subject.Any help will be greatly appreciated.
my email-id is : [email protected]

hi there my friend,
I am writing my own web server too. in w3c there is a sample web server called jigsaw-open source :) and simple-
I do think it worth trying.
you can contact me if you want to share some source and info. cause I will.
[email protected]
but within 2 weeks I will be back for studying for my web server. you have to wait for a while.

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Sockets in Java I believe are reusable. Once created, it can be used to send a request using its input stream and get back a response using the output stream. My problem is I am trying to connect to a website using java socket but I am unable to get a response (though the same works fine I use URL and URLConnection). Can anyone tell me whats wrong? Below is the client program:
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Creating Web Services using Java Implementation

Hi,
This is quite a general question on how to create a Web Service using Java Implementation that needs to conform to a client XML schema.
Here are my Version specs,
I am using Jdeveloper 10.1.3.4.0 and deploying onto OAS 10.1.3.
I will be creating a J2ee 1.4 (JAX-RPC) Web Service using Document/Wrapped style.
I have been provided an XML schema from the client which is quite complex.
Using a top-down approach, I can create my WSDL file and import the XML Schema for my type definitions.
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XML response from the web service must conform to the element, attribute definitions in the provided XML schema.
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tables and map each fields/column to the required XML output (defined in the XML schema).
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Hi,
This is quite a general question on how to create a Web Service using Java Implementation that needs to conform to a client XML schema.
Here are my Version specs,
I am using Jdeveloper 10.1.3.4.0 and deploying onto OAS 10.1.3.
I will be creating a J2ee 1.4 (JAX-RPC) Web Service using Document/Wrapped style.
I have been provided an XML schema from the client which is quite complex.
Using a top-down approach, I can create my WSDL file and import the XML Schema for my type definitions.
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XML response from the web service must conform to the element, attribute definitions in the provided XML schema.
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tables and map each fields/column to the required XML output (defined in the XML schema).
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to the required output. Can this mapping task be controlled within the Java program?
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Message was edited by:
NANDAN

The global zone should offer no services to the network except services required to administer the system. SSH from known IPs. Put everything in zones for the security of the system. Zones have no performance penalty so there is no advantage to running on the host system in the global zone.
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Message was edited by:
jgmarce

Security Filtering on the v7 Web Server using sed_request

I have been trying to improve protection of an application from cross-site scripting and SQL injection attackes. The ideal solution is the modsecurity rulebase but this is for Apache 2 only so I haev been looking for other solutions. I'm not going to guarantee all of the following since I haven't finished testing it but it looks hopeful so far as an avenue for investigation.
A direct port of the modsecurity engine to the Sun One / iPlanet web server has been started, with an unsupported implementation with near complete functionality in the version 7 codebase, but not all keywords required for the rules are available in this release and it remains unsupported for production use. A simpler but fully supported solution is the sed filter; which is also provided with the version 7 product, but as a separate NSAPI plugin implementing the sed_request and sed_response server application functions (SAFs) which could theoretically be lifted out and run against earlier versions of the web server.
So, how does the sed filter help? Well, although the functionality is less than that of the full modsecurity engine and performance is more limited, as implementing the Unix stream editor (sed) support for simple basic regular expressions it is possible to port some of the key modsecurity rules. The approach is a simple one:
* Choose the key rules for modsecurity that are to implemented, e.g. SQL injection, cross-site scripting, etc
* Open the rule set for each and copy out the extended regular expression
* Translate the extended regular expression to a standard basic regular expression, including replacing the found string with nothing
* Import the new sed rule into the obj.conf for the web server instance
This is best explained with a simple example.
First download the modsecurity source code from http://www.modsecurity.org and unpackage the tarball. In the resulting directory tree go to the rules/base_rules subdirectory and open the modsecurity_crs_41_sql_injection_attacks.conf file. In this file are a number of security rules defined, but a simple examination of each will show the format, the phase and a description after the SecRule keyword and some type information. Note that many of the security rules can be applied unchanged by the unsupported Sun One / iPlanet modsecurity engine that will be a full implementation in a future release. After the type information the extended regular expression used to define when the rule is to be applied can be found. For example, consider one SQL injection rule:
SecRule REQUEST_FILENAME|ARGS_NAMES|ARGS|XML:/* "\buser_tab_columns\b" \
"phase:2,rev:'2.0.5',capture,t:none,ctl:auditLogParts=+E,pass,no
log,auditlog,msg:'Blind SQL Injection Attack',id:'959536',tag:'WEB_ATTACK/SQL_INJECTION',tag:'WASCTC/WASC-19',tag:'OWASP_TOP_10/A1',tag:'OWASP_AppSensor/CIE1',tag:'PCI/6.5.2',logdata:'%{TX.0}',severity:'2',setvar:'tx.msg=%{rule.msg}',setvar
:tx.sql_injection_score=+%{tx.critical_anomaly_score},setvar:tx.anomaly_score=+%
{tx.critical_anomaly_score},setvar:tx.%{rule.id}-WEB_ATTACK/SQL_INJECTION-%{matched_var_name}=%{tx.0}"
In this the extended regular expression saying when this rule applies is "\buser_tab_columns\b"
which tells the rules engine to look for the phrase user_tab_columns in the input stream.
We want to replace this with nothing, so a sample sed rule for this would be
sed="s/\buser_tab_columns\b//g"
This says to replace all occurences found in the stream with nothing.
Taking this to its extreme, which will not result in the fastest processing, but will ptotect from cross-site scripting and SQL injection POST attacks against a back end Oracle environment, we end up with a complex segment of an obj.conf for Oracle iPlanet Web Server 7.09. Details are in the next post.

This is something like:
<Object name="default">
Input fn="insert-filter"
method="(GET|POST|HEAD)"
filter="sed-request"
sed="s/</\\</g"
sed="s/%3c/\\</g"
sed="s/%3C/\\</g"
sed="s/>/\\>/g"
sed="s/%3e/\\>/g"
sed="s/%3E/\\>/g"
sed="s/\x2Eexecscript\b//g"
sed="s/<body\b.*?\bonload\b//g"
sed="s/\blivescript://g"
sed="s/\bsettimeout\b[^a-zA-Z_0-9]*?//g"
sed="s/\x3C ?iframe//g"
sed="s/\bsrc\b[^a-zA-Z_0-9]*?\bjavascript://g"
sed="s/\bsrc\b[^a-zA-Z_0-9]*?\bvbscript://g"
sed="s/\btype\b[^a-zA-Z_0-9]*?\btext\b[^a-zA-Z_0-9]*?\becmascript\b//g"
sed="s/\x2Ecookie\b//g"
sed="s/\x3C\x21\x5Bcdata\x5B//g"
sed="s/\x2Eaddimport\b//g"
sed="s/\bhref\b[^a-zA-Z_0-9]*?\bjavascript://g"
sed="s/\btype\b[^a-zA-Z_0-9]*?\btext\b[^a-zA-Z_0-9]*?\bjscript\b//g"
sed="s/\balert\b[^a-zA-Z_0-9]*?\x28//g"
sed="s/\btype\b[^a-zA-Z_0-9]*?\bapplication\b[^a-zA-Z_0-9]*?\bx-vbscript\b//g"
sed="s/\x3C ?meta\b//g"
sed="s/\bsrc\b[^a-zA-Z_0-9]*?\bhttp://g"
sed="s/\btype\b[^a-zA-Z_0-9]*?\btext\b[^a-zA-Z_0-9]*?\bvbscript\b//g"
sed="s/\bhref\b[^a-zA-Z_0-9]*?\bvbscript://g"
sed="s/\burl\b[^a-zA-Z_0-9]*?\bjavascript://g"
sed="s/\x2Einnerhtml\b//g"
sed="s/\x40import\b//g"
sed="s/\x3C ?script\b//g"
sed="s/\btype\b[^a-zA-Z_0-9]*?\btext\b[^a-zA-Z_0-9]*?\bjavascript\b//g"
sed="s/\x2Efromcharcode\b//g"
sed="s/\burl\b[^a-zA-Z_0-9]*?\bvbscript://g"
sed="s/\bsettimeout\b[^a-zA-Z_0-9]*?\x28//g"
sed="s/<(a|abbr|acronym|address|applet|area|audioscope|b|base|basefront|bdo|bgsound|big|blackface|blink|blockquote|body|bq|br|button|caption|center|cite|code|col|colgroup|comment|dd|del|dfn|dir|div|dl|dt|em|embed|fieldset|fn|font|form|frame|frameset|h1|head|hr|html|i|iframe|ilayer|img|input|ins|isindex|kdb|keygen|label|layer|legend|li|limittext|link|listing|map|marquee|menu|meta|multicol|nobr|noembed|noframes|noscript|nosmartquotes|object|ol|optgroup|option|p|param|plaintext|pre|q|rt|ruby|s|samp|script|select|server|shadow|sidebar|small|spacer|span|strike|strong|style|sub|sup|table|tbody|td|textarea|tfoot|th|thead|title|tr|tt|u|ul|var|wbr|xml|xmp)[^a-zA-Z_0-9]//g"
sed="s/(asfunction|javascript|vbscript|data|mocha|livescript)://g"
sed="s/(fromcharcode|alert|eval)\x73*\x28//g"
sed="s/<!\x5Bcdata\x5B|\x5D>//g"
sed="s/['\"<]xss['\">]//g"
sed="s/(88,83,83)//g"
sed="s/'';!--\"<xss>=&{()}//g"
sed="s/&{//g"
sed="s/<!(doctype|entity)//g"
sed="s/(?i:<style.*?>.*?((@[i\\\\])|(([:=]|(&[#\x28\x29=]x?0*((58)|(3A)|(61)|(3D));?)).*?([(\\\\]|(&[#()=]x?0*((40)|(28)|(92)|(5C));?)))))//g"
sed="s/(?i:[ /+\t\"\'`]style[ /+\t]*?=.*?([:=]|(&[#()=]x?0*((58)|(3A)|(61)|(3D));?)).*?([(\\\\]|(&[#()=]x?0*((40)|(28)|(92)|(5C));?)))//g"
sed="s/(?i:<object[ /+\t].*?((type)|(codetype)|(classid)|(code)|(data))[ /+\t]*=)//g"
sed="s/(?i:[ /+\t\"\'`]datasrc[ +\t]*?=.)//g"
sed="s/(?i:<base[ /+\t].*?href[ /+\t]*=)//g"
sed="s/(?i:<link[ /+\t].*?href[ /+\t]*=)//g"
sed="s/(?i:<meta[ /+\t].*?http-equiv[ /+\t]*=)//g"
sed="s/(?i:<?import[ /+\t].*?implementation[ /+\t]*=)//g"
sed="s/(?i:<embed[ /+\t].*?SRC.*?=)//g"
sed="s/(?i:[ /+\t\"\'`]on\x63\x63\x63+?[ +\t]*?=.)//g"
sed="s/(?i:<?frame.*?[ /+\t]*?src[ /+\t]*=)//g"
sed="s/(?i:<isindex[ /+\t>])//g"
sed="s/(?i:<form.*?>)//g"
sed="s/(?i:<script.*?[ /+\t]*?src[ /+\t]*=)//g"
sed="s/(?i:<script.*?>)//g"
sed="s/(?i:[\"\'][ ]*(([^a-z0-9~_:\'\" ])|(in)).*?(((l|(\\\\u006C))(o|(\\\\u006F))(c|(\\\\u0063))(a|(\\\\u0061))(t|(\\\\u0074))(i|(\\\\u0069))(o|(\\\\u006F))(n|(\\\\u006E)))|((n|(\\\\u006E))(a|(\\\\u0061))(m|(\\\\u006D))(e|(\\\\u0065)))).*?=)//g"
sed="s/(?i:[\"\'][ ]*(([^a-z0-9~_:\'\" ])|(in)).+?(([.].+?)|([\x5B].*?[\x5D].*?))=)//g"
sed="s/\bsys\x2Euser_catalog\b//g"
sed="s/\bsys\x2Euser_tables\b//g"
sed="s/\bcharindex\b//g"
sed="s/\bsys\x2Eall_tables\b//g"
sed="s/\bsys\x2Euser_constraints\b//g"
sed="s/\bselect\b.{0,40}buser\b//g"
sed="s/\bwaitfor\b[^a-zA-Z_0-9]*?\bdelay\b//g"
sed="s/\bselect\b.{0,40}\bsubstring\b//g"
sed="s/\bsys\x2Euser_triggers\b//g"
sed="s/\blocate[^a-zA-Z_0-9]+\x28//g"
sed="s/\bsys\x2Euser_tab_columns\b//g"
sed="s/\battnotnull\b//g"
sed="s/\bsys\x28tab\b//g"
sed="s/\bselect\b.{0,40}\bascii\b//g"
sed="s/\bsys\x2Euser_views\b//g"
sed="s/\binstr[^a-zA-Z_0-9]+\x28//g"
sed="s/\bsys\x2Euser_objects\b//g"
sed="s/\buser_tables\b//g"
sed="s/\buser_tab_columns\b//g"
sed="s/\ball_objects\b//g"
sed="s/\bsubstr\b//g"
sed="s/\bsysdba\b//g"
sed="s/\btextpos[^a-zA-Z_0-9]+\x28//g"
sed="s/\buser_password\b//g"
sed="s/\buser_users\b//g"
sed="s/\buser_constraints\b//g"
sed="s/\bcolumn_name\b//g"
sed="s/\bsubstring\b//g"
sed="s/\bobject_type\b//g"
sed="s/\bobject_id\b//g"
sed="s/\buser_ind_columns\b//g"
sed="s/\bcolumn_id\b//g"
sed="s/\btable_name\b//g"
sed="s/\bobject_name\b//g"
sed="s/\brownum\b//g"
sed="s/\buser_group\b//g"
sed="s/\butl_http\b//g"
sed="s/\bselect\b.*?\bto_number\b//g"
sed="s/\bgroup\b.*\bbyb.{1,100}?\bhaving\b//g"
sed="s/\bselect\b.*?\bdata_type\b//g"
sed="s/\bisnull\b[^a-zA-Z_0-9]*?\x28//g"
sed="s/\bunion\b.{1,100}?\bselect\b//g"
sed="s/\binsert\b[^a-zA-Z_0-9]*?\binto\b//g"
sed="s/\bselect\b.{1,100}?\bcount\b.{1,100}?\bfrom\b//g"
sed="s/\x3B[^a-zA-Z_0-9]*?\bdrop\b//g"
sed="s/\bloadb[^a-zA-Z_0-9]*?\bdata\b.*\binfile\b//g"
sed="s/\bselect\b.*?\bto_char\b//g"
sed="s/\bdbms_java\b//g"
sed="s/\bnvarchar\b//g"
sed="s/\butl_file\b//g"
sed="s/\binner\b[^a-zA-Z_0-9]*?\bjoin\b//g"
sed="s/\bselect\b.{1,100}?\bfrom\b.{1,100}?\bwhere\b//g"
sed="s/\bintob[^a-zA-Z_0-9]*?\bdumpfile\b//g"
sed="s/\bdelete\b[^a-zA-Z_0-9]*?\bfrom\b//g"
sed="s/\x3B[^a-zA-Z_0-9]*?\bshutdown\b//g"
sed="s/\bautonomous_transaction\b//g"
sed="s/\bdba_users\b//g"
sed="s/\bselect\b.{1,100}?\btop\b.{1,100}?\bfrom\b//g"
sed="s/\b(?:coalesce\b|root\x40)//g"
sed="s/\b(?:(?:rel(?:(?:nam|typ)e|kind)|to_(?:numbe|cha)r|d(?:elete|rop)|group\b[^a-zA-Z_0-9]*\bby|insert|where)\b|s(?:(?:ubstr(?:ing)?|leep)[^a-zA-Z_0-9]+\x28|(?:hutdown|elect)\b)|(?:b(?:enchmark|in)|find_in_set|position|mid)[^a-zA-Z_0-9]+\x28|c(?:o(?:n(?:cat[^a-zA-Z_0-9]+\x28|vert\b)|unt\b)|ha?r\b)|u(?:n(?:hex[^a-zA-Z_0-9]+\x28|ion\b)|pdate\b)|l(?:o(?:cate|wer)[^a-zA-Z_0-9]+\x28|ength\b)|a(?:ttn(?:ame|um)\b|scii[^a-zA-Z_0-9]+\x28)|h(?:aving\b|ex[^a-zA-Z_0-9]+\x28))//g"
sed="s/(?:[\\\x28\x29\x25#]|--)//g"
sed="s/\b(?:benchmark|encode)\b//g"

How do i connect to sql server using java?

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M.

If you use Java-plugin, you can embed Java3D in a web page.
Here is the URL(http://www.geovista.psu.edu/products/demos/LorenzAttractor3D/index.html) which used Java3D.
I hope this helps.
Masa

HTTP Web Server

Hi!
I have to make an http web server: in a browser, I write http://ServerName:port/file and the browser must display the file. The only problem now seems to be that I changed
This line gets the OutputStream of the client socket
out = new PrintWriter(new OutputStreamWriter(scliente.getOutputStream(),"8859_1"),true) ;And this thing sends the response to the browser:
out.println("HTTP/0.9 200 ok");
                out.println("Server: Nombre del Servidor/1.0");
                out.println("Date: " + new Date());
                out.println("Content-Type: text/html");
                out.println("Content-Length: " + file.length());
                out.println(System.getProperty("line.separator"));
                BufferedReader localFile= new BufferedReader(new FileReader(archivo));
                String line= "";
                do
                    line = localFile.readLine();
                    if (line != null )
                        // sleep(500);
                        out.println(line);
                while (linea!= null);The thing is... That didn't work for displaying images and other file types, which is why I changed the previous code to:
out = scliente.getOutputStream();And the other part to:
byte[] contenido;
                int tamano;
                escribirEnCliente("HTTP/1.1 200 ok");
                escribirEnCliente("Server: Nombre del Servidor/1.0");
                escribirEnCliente("Date: " + new Date());
                escribirEnCliente("Content-Type: " + new MimetypesFileTypeMap().getContentType(archivo));
                escribirEnCliente("Content-Length: " + archivo.length());
                FileInputStream archivoLocal = new FileInputStream(archivo);
                tamano = archivoLocal.available();
                contenido = new byte[tamano];
                do
                  tamano = archivoLocal.read(contenido);
                  out.write(contenido);
                while (tamano != -1);escribir en cliente is a procedure like this:
public void escribirEnCliente(String str)
            out.write(str.getBytes("8859_1"));
}This way, I thought, I could send all types of files, not only text files. But it doesn't work, it doesn't even load the page. Any suggestions?

...and in your do/while loop think what happens when read() does return -1. You still write the entire buffer. You should do something like this instead:
    while (true) {
        int count = in.read(buf);
        if (count == -1)
            break;
       out.write(buf, 0, count);
    }

Resources for implementing HTTP web server using java

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