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Created by Dr. Xi on August 15, 2012 12:05:39 Last update: August 15, 2012 12:05:39
Use OpenSSL's s_client command to fetch a page manually:
$ openssl s_client -connect localhost:443 -state -...Sample session for Google:
$ openssl s_client -connect www.google.com:443 -st...Resource: SSL/TLS Strong Encryption: FAQ
Created by Fang on November 28, 2011 21:04:15 Last update: November 28, 2011 21:04:15
<h:outputScript target="head"> <![CDATA...Use XML entities:
Created by magnum on September 25, 2011 21:51:23 Last update: September 26, 2011 20:49:22
A simple socket client in C.
#include <stdio.h> #include <stdlib.h> #incl...
Created by freyo on September 07, 2011 16:46:14 Last update: September 07, 2011 19:23:00
The Android unit test framework is based on JUnit 3 , not JUnit 4. Test cases have to extend junit.framework.TestCase or a subclass (such as android.test.InstrumentationTestCase ). Tests are identified by public methods whose name starts with test , not methods annotated with @Test (as in JUnit 4). An Android test suite is packaged as an APK, just like the application being tested. To create a test package, first you need to identify the application package it is testing. Google suggests to put the test package source in a directory named tests/ alongside the src/ directory of the main application. At runtime, Android instrumentation loads both the test package and the application under test into the same process. Therefore, the tests can invoke methods on...
Created by voodoo on August 14, 2011 15:42:43 Last update: August 14, 2011 15:42:43
When I ran this code snippet with strace :
f = fopen("TZ", "rb"); fseek(f, 0, SEEK_END); ...I saw ENOTTY error with uClibc :
open("TZ", O_RDONLY|O_LARGEFILE) = 3 ioc...With the normal gnu libc , there's no such error:
open("TZ", O_RDONLY) = 3 fstat64...There was no error running the program. But for some reason, uClibc did a ioctl call when it opened a file, and handled it appropriately.
Created by freyo on May 17, 2011 11:13:17 Last update: May 17, 2011 11:13:17
This is an odd-ball content provider in that it doesn't provide database records, but provides a resource as a stream. It can be used to provide media files or XML resources. Start the project with:
tools/android create project --package com.android...Create assets directory and add an XML file ( assets/demo.xml ):
<? xml version="1.0" encoding="UTF-8"?> <people...Edit the layout ( res/layout/main.xml ):
<?xml version="1.0" encoding="utf-8"?> <LinearL...Edit src/com/android/cptest/Dummy.java :
package com.android.cptest; import java.io....Add content provider ( src/com/android/cptest/XmlResource.java ):
package com.android.cptest; import java.io....Update AndroidManifest.xml :
<?xml version="1.0" encoding="utf-8"?> <manifes...Add this section to the end of build.xml :
<target name="-package-resources"> <ech...Build and install:
ant installScreenshot: Remove the Dummy activity ( AndroidManifest.xml ):
<?xml version="1.0" encoding="utf-8"?> <manifes...Create a new project for...
Created by Dr. Xi on March 02, 2011 11:39:18 Last update: March 09, 2011 12:19:30
Some peculiarities about Java PrintWriter: PrintWriter never throws any exceptions. From JavaDoc : Methods in this class never throw I/O exceptions, although some of its constructors may. The client may inquire as to whether any errors have occurred by invoking checkError(). When error occurs, you'll never know anything more than that it occured, because checkError returns boolean. When a character is out of the range of the character encoding of the PrintWriter, it prints a question mark (?). But this is not an error. Test code:
import java.io.*; public class TestPrintWri...Latin1 test result:
java TestPrintWriter iso-8859-1 | od -bc 000000...UTF-8 test result:
java TestPrintWriter utf-8 | od -bc 0000000 141...Also, the constructor throws a FileNotFoundException when you try to write to a...
Created by voodoo on July 11, 2009 15:14:55 Last update: July 29, 2010 22:45:48
cURL is a command line tool for transferring files with URL syntax. The main purpose and use for cURL is to automate unattended file transfers or sequences of operations. It's really easy to see HTTP headers with curl:
C:\>curl --head http://www.google.com HTTP/1.0 ...or, headers and page together (dump headers to stdout):
$ curl --dump-header - http://www.google.com HTTP/...Download openssl from openssl.org:
C:\>curl --help Usage: curl [options...] <url> ...
Created by Dr. Xi on February 09, 2009 23:14:15 Last update: February 09, 2009 23:14:15
This example demonstrates the general steps in creating a custom Java class loader. Normally a class loader would consult its parent class loader when asked to load a class. If it's not loaded by the parent class loader, then the class loader would try to load the class on its own. This class loader tries to load the requested class on its own first, and delegates to the parent only when a java.lang.SecurityException is thrown (which happens when it tries to load core Java classes such as java.lang.String ). The classes are loaded from CLASSPATH through the getResourceAsStream call. It's important to note that when a class is loaded with a certain class loader, all classes referenced from that class are also loaded through the...