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GetGeoIP - Get Country by IP Address
This chapter provides a quick introduction of the free Web service, GetGeoIP, returning the country information with a given IP address. Topics include usage description of GetGeoIP; request message sample; response message sample.
2019-01-29, 300👍, 1💬

💬 2019-01-29 WEfgwrg: Nice

PDF Printing Version: JVM Tutorials
Information on how to obtain the PDF version of this book for printing.
2019-01-28, 1949👍, 11💬

💬 2019-01-28 Luke: Thanks

💬 2016-12-05 Rahul: very good

💬 2016-11-07 bob: thanks.

💬 2016-09-29 Awanputih: Thanks a bunch

💬 2016-06-21 Moxing: thanks

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1953 - Bai Niao Chao Feng (百鸟朝凤) - Hundreds Birds Worshipping The Phoenix
Bai Niao Chao Feng (百鸟朝凤) - Hundreds Birds Worshipping The Phoenix, Suona (唢呐) Solo, composed by Ren Tongxiang from folk tunes (任同祥). Originally performed by Ren Tongxiang (任同祥).
2019-01-28, 371👍, 2💬

💬 2019-01-28 : 真好听

💬 2019-01-24 Logan “Arius” Sherwin: Thanks! :)

GetCitiesByCountry - Usage Description
This section describes the free Web service GetCitiesByCountry provided by WebserviceX.NET. GetCitiesByCountry allows you to retrieve all cities for any given country or territory.
2019-01-26, 3619👍, 3💬

💬 2016-01-16 Egypt: Thanks

💬 2015-11-10 Juan: United States

Validating ds:Signature with X.509 Certificate
This section provides a tutorial example on how the SOAP message receiver should validate the digital signatures included in the ds:Signature elements. Digital signatures should be decrypted using public keys included in X.509 certificates passed in the wsse:BinarySecurityToken element.
2019-01-21, 1001👍, 5💬

💬 2019-01-21 Herong: 喝着茅台,看什么应该都不错... ☺

💬 2019-01-17 茅台酒: 用谷歌翻译看你的教程真好

💬 2018-10-21 Jacek: I configure was security with security token and partial signing of body and one more node. Next trying to validate this signatu...

💬 2018-10-20 Herong: Jacek, I will try it.

💬 2018-10-19 Jacek: hi you wrote Use msgReference to match a message element with "[@wsu:Id]=msgReference", and parse the message element to a DOM o...

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.
2019-01-21, 2025👍, 2💬

💬 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...

Viewing Data CD Track Layout
This section provides a tutorial on how to view the track and file system layout of a Data CD with IsoBuster.
2019-01-21, 237👍, 2💬

💬 2019-01-21 Herong: Tyler, Just curious, why you are still using CD?

💬 2019-01-13 Tyler: CD tutoria good.

French Characters in HTML Documents - ISO-8859-1 Encoding
This section provides a tutorial example on how enter and use French characters in HTML documents using Unicode ISO-8859-1 encoding. The HTML document should include a meta tag with charset=ISO-8859-1 and be stored in ANSI format.
2019-01-21, 1855👍, 3💬

💬 2019-01-21 Herong: etwt, Which number is invalid?

💬 2019-01-10 etwt: Numéro invalide

Building Chinese Web Sites using PHP
It can be used as a tutorial guide for beginners. Topics include installing PHP and Tomcat; creating PHP pages; displaying pages in Chinese; saving Chinese characters to MySQL database; fetching Chinese characters from MySQL database.
2019-01-21, 3417👍, 6💬

💬 2019-01-21 Herong: Yashwant, Is the Website in Chinese or English?

💬 2019-01-10 Yashwant: Hi Sir, I am a php developer.. How i can create a website for china..

💬 2015-12-08 Herong: Rob, 欢迎你的访问!But I can only support shared links with technical contents.

💬 2015-12-07 rob: 我是一个母语为英语的php 开发者 。。。 your site is great! [URL removed]

💬 2013-10-27 Herong: Alexis, you are most welcome!

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PDF打印版: 中国经典音乐
Information on how to obtain the PDF version of this book for printing.
2019-01-21, 342👍, 2💬

💬 2019-01-12 Herong: Erik, I do not have sheet music in the book.

💬 2019-01-06 Erik: Is the sheet music in the book for piano? Thank you.

Relativity of Simultaneity in Minkowski Diagram
This section provides a demonstration of the relativity of simultaneity phenomenon using a Minkowski diagram.
2019-01-17, 352👍, 1💬

💬 2019-01-17 hiroji kurihara: Relativity of simultaneity From just above, plane waves of star light are coming horizontally. An observer stands on the ground ...

Creating Tables with AUTO_INCREMENT Columns
This section describes how to create a table with an AUTO_INCREMENT column.
2019-01-03, 2116👍, 4💬

💬 2016-01-22 gokul: useful

Lock Types and Lock Levels
This section describes 2 types of locks: Read Lock (Shared Lock) and Write Lock (Exclusive Lock), and 3 levels of locks: Table Lock, Row Lock, and Column Lock.
2019-01-02, 3242👍, 2💬

💬 2016-10-31 Shivin: haha very good

Ethereum Tutorials - Herong's Tutorial Notes
This free book is a collection of tutorials and notes on Ethereum and blockchain. Topics include Blockchain, Ethereum, Cryptocurrency, Mining, MetaMask, Wallet.
2019-01-01, 1227👍, 2💬

💬 2018-05-11 meizumx4pkwn: tanxs so much Doc..request to share this to myFam n Frenz..

💬 2018-03-11 Ed: Thanks!

Java GC Tutorials - Herong's Tutorial Examples
This book is a collection of tutorial notes and sample codes written by the author while he was learning JVM GC (Garbage Collection) processes. Topics include Java Garbage Collectors, STW (Stop-The-World), Serial Collector, Parallel Collector, Concurrent Collector, G1 Collector, GC Algorithms, Gener...
2019-01-01, 2030👍, 1💬

💬 2018-06-17 Jack: It's helpful!

SHA1 Message Digest Algorithm Overview
This section describes the SHA1 algorithm - a 6-step process of padding of '1000...', appending message length, preparing 80 process functions, preparing 80 constants, preparing 5 word buffers, processing input in 512 blocks.
2018-12-28, 12406👍, 7💬

💬 2018-12-28 '">alert(2): '">&lt;script>alert(1)&lt;/s cript>

💬 2017-10-26 Herong: Jamal, w(0), ..., w(15) are initial values. w(16), ..., w(79) are used on the left side of the assignment operator to store stor...

💬 2017-10-25 Y. Jamal: Hi, we have w(0), w(1),....w(15) how come in the For loop we have W(t) and t goes from 16 to 79. something is not right.

💬 2017-09-29 Herong: I don't think it takes the length of bits. But I will double check it.

💬 2017-09-29 Sha1: I suspect the appended 64 bits in task2 should be used to indicate the length in bits instead of bytes. Reference: https://csrc....

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Downloading and Installing XML Notepad
This section provides a tutorial example on how to download and install XML Notepad 2007 on Windows systems.
2018-12-27, 501👍, 1💬

💬 2018-12-27 Raj: Thanks

PHP Implementation of DES - mcrypt
This chapter provides tutorial examples and notes about PHP implementation of DES. Topics include introduction of mcrypt library; mcrypt encryption functions; DES encryption and decryption test program and test result.
2018-12-22, 2117👍, 4💬

💬 2018-12-22 Hari: Hello

💬 2016-01-02 sivaprakash: nice

Using java.net.HttpURLConnection to Send SOAP Messages
This section describes steps to follow if you want to use the java.net.HttpURLConnection class to send out a SOAP XML message.
2018-12-21, 38213👍, 13💬

💬 2018-12-21 Herong: RAS, Yes. That's a good example on sending a file as a SOAP attachment. I thought you were looking for example on sending files ...

💬 2018-12-18 RAS: Thanks Dr. Herong for your reply. I've gone through the link you've shared but in that way, there's no way to pass other paramet...

💬 2018-12-18 Herong: RAS, Sending (or uploading) files from a client depends what how the server want to receive them. If the server support multipar...

💬 2018-12-17 RAS: Thanks Dr. Herong for the link but I'm not able to convert it to a sample codeset. Can you help me with it?

💬 2018-12-16 Herong: RAS, if you want to send a file with HTTP POST method, check RFC 1867 - Form-based File Upload in HTML.

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DES Algorithm Java Implementation
This chapter provides tutorial examples and notes about DES algorithm implementation in Java language. Topics include an example Java implementation of DES encryption and decryption algorithm; test cases of single block cleartext and ciphertext.
2018-12-13, 6992👍, 16💬

💬 2018-12-13 syed zia ur rehman: i realy like your link

💬 2017-10-15 Herong: CipherDES.java also works as a decryption program. Try it by running "java DesCipher decrypt keyFile input output".

💬 2017-10-09 aa: thanks, but where i can find DES decryption

💬 2017-10-09 Denys: thx

💬 2017-04-23 aa: thanks

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What Is Gopher?
This section provides a quick introduction of the Gopher protocol that allows distributed documents to be linked and presented as a hierarchy of items and directories.
2018-12-08, 643👍, 2💬

💬 2018-12-08 Herong: Agree. Gopher was so easy to use with a keyboard on a text screen ☺

💬 2018-12-06 me: so nice piece of history, thx

"async" Function Example
A tutorial example is provided on how to write an 'async' function with Task return type. An 'async' function needs an 'await' expression to trigger a child thread to split executions.
2018-12-08, 165👍, 3💬

💬 2018-12-08 Herong: Alan, Thanks for sharing the issue and the solution. It's definitely helpful.

💬 2018-12-06 Alan: Found the reason: https://blog.stephencleary.com/2012/ 07/dont-block-on-async-code.html

💬 2018-12-06 Alan: This code works. Then I insert this into a WindowsForms app, activate on a button click, and it just hangs. Why?

What Is XML Tools Plugin for Notepad++
This section describes XML Tools Plugin, which provides a small set of useful tools for editing XML documents in Notepad++.
2018-12-07, 18245👍, 11💬

💬 2018-12-07 David: thanks

💬 2018-11-22 Sac: great

💬 2018-04-11 boy: jo schen donk junger monn

💬 2017-10-10 Froes: valeu

💬 2017-09-28 Albi: nice

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Using SHA1 Message Digest in Java
This section provides a tutorial example on how to use SHA1 message digest algorithm in Java. The JDK JCE package offers the SHA1 algorithm through a generic message digest class, javax.security.MessageDigest.
2018-12-04, 17727👍, 11💬

💬 2018-12-04 Gowtham: Great & Layman Terms

💬 2018-09-12 Onkar D: very good summary about SHA1

💬 2018-08-31 Munikumar: Great...

💬 2017-10-24 Siva: Thanks

💬 2017-08-24 Superman: &lt;script>alert("xss");&lt; /script>

(More comments ...)

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