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Retrieving and Setting HTTP Cookies
This section provides a tutorial example on how to retrieve cookies from the HTTP request header and set cookies to the HTTP response header. Cookie objects are created with the CGI::Cookie class.
2021-01-08, 272👍, 6💬

💬 2021-01-02 Herong: Rajat, show us your request dump, including headers. Maybe something wrong in your request.

💬 2020-12-22 Rajat: Thank you sir for your response. Actually issue is when i m trying to do a post using mechanize object i guess its blocking the ...

💬 2020-11-22 Herong: Rajat, LWP-UserAgent-Request.pl script only fires a single HTTP request to single Web server. To get 3rd party cookies, you need...

💬 2020-11-12 Rajat: Thanks sir i have tried out ` "LWP-UserAgent-Request.pl - GET, POST and Cookies" tutorial` but that didn't work. The cookie is a...

💬 2020-11-11 Herong: Rajat, you can follow "LWP-UserAgent-Request.pl - GET, POST and Cookies" tutorial to download cookies from Website.

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What Is PKCS5Padding?
This section describes what is PKCS5Padding - a schema to pad cleartext to be multiples of 8-byte blocks.
2021-01-07, 30710👍, 10💬

💬 2021-01-07 Your Name: Please write meaningful comments. Thanks! ☺

💬 2020-11-04 perico: otra vez va a salir trump??

💬 2016-06-16 yo: hola pescado

💬 2016-04-04 ankit: this is me.

💬 2016-01-28 John: Herong, thanks a lot.

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OpenSSL "enc -bf-ofb" for Blowfish/OFB Encryption
Tutorial notes and example codes are provided OpenSSL 'enc -bf-ofb' command for Blowfish encryption in OFB mode. Topics include introduction of OFB (Output FeedBack) cipher operation mode; Literal Key options to specify secret key and IV directly; Salted Key and Random Salt options to specify secret...
2021-01-03, 112👍, 1💬

Downloading and Installing JDK 1.8.0 on Windows
This section provides a tutorial example on how to download and install JDK 1.8.0 (Java SE 8), which contains the HotSpot 1.8 JVM, on a Windows XP system. A simple Java program was entered, compiled, and executed with the new JDK installation.
2021-01-01, 72469👍, 52💬


💬 2020-06-28 bipu kumar: i need it

💬 2020-04-24 R Z: OK

💬 2020-04-16 Kanna: Thanks!

💬 2020-03-31 nasaki: ok

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Passing Values between JSP Pages
This section provides a tutorial example on how to use different ways to pass values between JSP pages: putting values in 'session' or 'application' objects, or putting values at the end of redirect URL.
2020-12-22, 835👍, 7💬

What Is JDK
This section describes what is JDK (Java Development Kit) - a development environment for building software applications and software components using the Java programming language.
2020-12-15, 173👍, 2💬

💬 2020-12-15 台湾人邢冠楷: 支持

💬 2020-06-23 Hana: Done

Using "adb logcat" Command for Debugging
This chapter provides tutorial notes on the 'adb logcat' command. Topics include using 'adb logcat' command options and arguments; viewing log buffers: main, events, and radio; creating rotated log files; control log format as 'brief' or 'long'; filtering out log entries by priority and process tag;...
2020-12-14, 5760👍, 3💬

💬 2018-10-11 Jose: Tanks

printenv.pl - Testing Perl CGI Environment
This section provides a tutorial on how to modify the Perl CGI test script, printenv.pl, and run it to verify Apache 2 Perl CGI configuration.
2020-12-14, 433👍, 2💬

💬 2020-12-13 Herong: Alan, yes. You can run a similar Perl CGI script on a Linux server and you will get a different set of environment variables.

💬 2020-12-12 Alan: Under Linux/unix at least you can also do a chmod +x on the program and run it from a command line to test. The CGI environment ...

JDBC Tutorials - Herong's Tutorial Examples
This JDBC tutorial book is a collection of notes and sample codes written by the author while he was learning JDBC technology himself. It can be used as a tutorial guide for beginners. Topics include Java, Database, JDBC, Driver, ODBC, Connection, DataSource, SQL, ResultSet, Metadata, Derby, MySQL, ...
2020-12-11, 7634👍, 10💬

💬 2017-06-26 NIRMAL PUDASAINI: how cani get it?

💬 2015-12-15 hassan: nice, can i get it please?

💬 2015-09-20 Alan: Nice

💬 2011-01-21 Herong: Agree. The driver class must be loaded as shown in this tutorial: Loading Driver Class with Class.forName().

💬 2011-01-18 John: For the JDBC tutorials, you must add: Class.forName with newInstance before making connection.

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3200: Enclosed CJK Letters and Months
This section provides a quick summary of the Unicode code point block: 'Enclosed CJK Letters and Months', which contains 256 code points to represent characters enclosed in circles used in CJK (Chinese, Japanese, and Korean) languages.
2020-12-07, 143👍, 1💬

💬 2020-12-07 Eddie: I like this

XML Files with Embedded DTD Statements
This section provides a tutorial example on how to include DTD statements inside XML files. Embedded DTD statements should appear after the 'xml' process instruction and before the root element.
2020-12-05, 187👍, 2💬

About This Book: Chinese Calendar
This section provides some detailed information about this book - Chinese Calendar and Algorithm - Year 1901 to 2100.
2020-12-02, 162👍, 1💬

💬 2020-12-02 Kevin Elvin: Entering dates in my calendar CCPlus

Year 1903 Chinese Calendar - Year of the Rabbit
2020-12-02, 133👍, 1💬

💬 2020-12-02 Kevin Elvin: Entering the dates in my calendar CCPlus

Downloading and Running Flash Player Projector
This section describes a tutorial example on how to download and run Adobe Flash Player Projector to play Flash applications stored in SWF files without using Web browsers.
2020-12-02, 1477👍, 2💬

💬 2020-12-02 acef: merci infiniment

1964 - Ma Ling Er Xiang Lai ... (马铃儿响来玉鸟儿唱) - Bird Singing Along With Horse Bell Ringing
Ma Ling Er Xiang Lai Yu Niao Er Chang (马铃儿响来玉鸟儿唱) - Bird Singing Along With Horse Bell Ringing, lyrics by Ge Yan (葛炎), Liu Qiong (刘琼), music by Luo zongxian (罗宗贤), Ge Yan (葛炎), produced in 1964.
2020-12-01, 165👍, 4💬

💬 2020-12-01 Herong: raoyc, thanks for the link. But Lucas is looking an English version...

💬 2020-11-29 raoyc: @Lucas visit https://haokan.baidu.com/v?vid=17203 633039526567141&pd=bjh&fr=bj hauthor&type=video

💬 2020-11-22 Herong: Lucas, that's a huge challenge for me. Hope someone else reading this comment can help you out.

💬 2020-11-12 Lucas Tazikly: Hi, herong! I'm trying to learning to play this song on the piano and sing it in English, so can you please translate Ma LIng Er...

Inserting CLOB Values with SQL INSERT Statements
This section describes how to insert CLOB values as string literals using SQL INSERT statements.
2020-11-30, 114👍, 1💬

Web Server Log File Samples - IIS and Apache
This section provides a quick introduction of Web server log files with examples of IIS and Apache servers.
2020-11-25, 23876👍, 29💬

💬 2020-11-25 naga pavan: Nice

💬 2020-07-21 yadana: thanks

💬 2020-06-20 Herong: Tom and others, I will try to offer a small sample log file for download.

💬 2020-06-14 tom: 我想获得日志文件


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Converting Secret Keys to and from Byte Arrays
This section provides a quick introduction of the SecretKeySpec class and the KeySpec interface. They can be used to convert secret keys into byte arrays to store them in external files.
2020-11-23, 11871👍, 5💬

💬 2019-04-22 xyz: $9$RTHhSlWL7VsguO7dbw4oiHqf6CuOIRhyl K4JGDq.TQF/OIcyeLXNbsPTz3CAW8X

💬 2018-10-20 Herong: Marco, I just did a Google translation on your comment: "I wonder what all this could be". Are you trying to ask a question?

💬 2018-10-16 Marco: mi chiedo che cosa potrebbe essere tutto questo

💬 2015-11-03 cpp: hello

ChangeLengthUnit - Usage Description
This section describes the free Web service ChangeLengthUnit provided by WebserviceX.NET. ChangeLengthUnit allows you to convert length values in Millimeters, Centimeters, Inches, Feet, Yards, Meters, Kilometers, Miles and more.
2020-11-23, 345👍, 3💬

💬 2020-11-23 mmm: hello world

💬 2020-08-20 Herong: Mike, I don't have the source code. Hope someone can develop one. It shouldn't that hard.

💬 2020-08-18 Mike: The service is no longer available at that URL. Any chance you can release the source code so someone can re-host it?

Illustration of RSA Algorithm: p,q=5,7
This section provides a tutorial example to illustrate how RSA public key encryption algorithm works with 2 small prime numbers 5 and 7.
2020-11-22, 3255👍, 4💬

💬 2020-11-22 Herong: fab, as shown in the tutorial, the modulus is 35. The encryption key (public key) is 5, and the decryption key (private key) is ...

💬 2020-11-15 fab: Construct an example of the RSA scheme as follows. The two primes to be used for the modulus N are 5 and 7. What is (N)? Confir...

💬 2019-01-21 Herong: someone, why 35 and 5 must be coprime numbers?

💬 2019-01-16 someone: >Compute n = p*q: n = 5*7 = 35 >Compute m = (p-1)*(q-1): m = 4*6 = 24 >Select e, such that e and m are coprime numbers: e = 5 35...

Downloading and Installing JDK 1.8
This section describes how to download and install Java SE Development Kit (JDK) 8u45 on a Windows system.
2020-11-20, 14307👍, 10💬

💬 2020-04-27 ema: thanks

💬 2020-04-27 ema: thanks

💬 2020-04-27 ema: thanks

💬 2019-04-16 yacine: thanks

💬 2017-10-09 Ivan: Thanks!

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Ethereum Public Key and Private Key Example
This section describes examples of public key and private key of an Ethereum account.
2020-11-19, 138👍, 1💬

SSL Socket Communication Test
This section describes how to perform a SSL socket communication test with a SSL server socket test program, a SSL client socket test program, a pair of private key and public key, and a self-sign certificate of the public key.
2020-11-14, 106👍, 1💬

Perl Tutorials - Herong's Tutorial Examples
This Perl tutorial book is a collection of notes and sample codes written by the author while he was learning Perl language himself. Topics include ActivePerl, data types, subroutines, debug, references, objects, open, binary, file, directory, DBM, MySQL, regular expression, RPC::XML, XML::Simple, S...
2020-11-12, 6188👍, 6💬

💬 2020-11-12 Rajat: Hi Herong sir, I am getting error while doing $mech->post for a request every time.Error looks like this `read timeout at /usr/s...

💬 2017-10-23 guru: That's an issue with the Perl script, not with running the script itself, and it deserves another question (not here, on Stack O...

💬 2017-10-06 drhvr: mysql I added root as user and password.in singlequotes. It works great

💬 2014-03-17 Steven Klotz: Hi Herong, I found this web site while looking for PERL examples. Your knowledge and the amount of work you done (docu, tutorial...

💬 2010-11-22 Herong: Kim, Yes, you can prompt the user for a path name, open directory with opendir(), loop through each files, use the -s operator t...

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