Enable POP in Gmail

In Gmail settings:
1. Click Settings at the top of any Gmail page.
2. Click Forwarding and POP/IMAP.
3. Select Enable POP for all mail or Enable POP for mail that arrives from now on.

In Outlook Express settings:
1. In Incoming mail(POP3): pop.gmail.com
2. In Outgoing mail(SMTP): smtp.gmail.com
3. In Advanced tab,
3.1 Check both "This server requires a secure connection(SSL)" checkbox of SMTP and POP3
3.2 Modify the port number of SMTP to 465, and POP3 to 995

see here and here

Apache + SSL

Apache + SSL真不是新東西了, 之前也做過好多次了...
但這次稍微踢到鐵板, 因此紀錄一下吧

鐵板版本為httpd-2.0.53/54 + openssl-0.9.8:

wget http://www.openssl.org/source/openssl-0.9.8i.tar.gz
./config
make && make install

wget ftp://ftp.yzu.edu.tw/mirror/pub1/Sun/sunfreeware.com/ \\ SOURCES/httpd-2.0.53.tar.gz
./configure --enable-so --enable-ssl --with-ssl=/usr/local/ssl
make && make install

啟動SSL出現錯誤訊息...

/usr/local/apache/bin/apachectl startssl
ssl_engine_pphrase.c: In function `ssl_pphrase_Handle_CB':

原來是openssl版本判斷的問題,
修改抓回來的source,
檔案httpd-2.0.53/modules/ssl/ssl_toolkit_compat.h

#ifdef OPENSSL_VERSION_NUMBER

+#if (OPENSSL_VERSION_NUMBER >= 0x0090800fL)
+#ifndef PEM_F_DEF_CALLBACK
+#define PEM_F_DEF_CALLBACK PEM_F_PEM_DEF_CALLBACK
+#endif
+#endif
+
/*
* rsa sslc uses incomplete types for most structures
* so we macroize for OpenSSL those which cannot be dereferenced

重新config就完成啦! 說明請參考此處...

熱血青年

今天跟mclee和makoto聚餐, 感覺熱血沸騰,
有為者亦若是阿, 待我自由身, 必當有一番作為,
感謝這些同學們...

Request From an Authentication Web Server via Telnet

如何向有基本驗證的網頁伺服器以telnet的方式請求網頁?

根據Wikipedia的說明, authentication的使用者名稱與密碼是透過Base64的方式編碼, 格式為user:password,

因此須先準備好編碼完的結果, 可參考Base64與ASCII的互換,

以telnet到localhost的根目錄為範例, 帳號與密碼為admin:password

GET / HTTP/1.1
HOST: 127.0.0.1
Authorization: Basic YWRtaW46cGFzc3dvcmQ=

結果

HTTP /1.1 200 OK

Combination Generator for PHP

之前需要寫個組合產生器,
寫來寫去, 也跟網路上找到的寫法一樣, 就順便用了他的注解嚕...

/*                                                                                                                            
 * Date   : 2008-06
 * Name   : getCombinationOutput
 * Usage  : Generate all combinations of the elements in the array
 * Input  : @param array   input array contains all elements
 *          @param integer number of choosing
 *          @param string  output file name
 * Output : a text file contains all combination
 *
 * Example :
 * $array = array( 684, 1056, 1066, 1274 );
 * getCombinationOutput( $array, 2, "test.out" );
 *
 * test.out :
 * 684 1056
 * 684 1066
 * 684 1274
 * 1056 1066
 * 1056 1274
 * 1066 1274
 */

function getCombinationOutput( $input_array, $select, $output )
{
    $_number = sizeof($input_array);

    if ( !($_fp = fopen( $output, "a") ) ) 
    {   
        echo "can't open file!\n\r";

        return 0;
    }   

    $_array = array();

    for ( $_i=0; $_i<$select; $_i++ )
    {
        $_array[$_i] = $_i + 1;
    }

    while (1)
    {
        $_temp = array();

        for ( $_i = 0; $_i < $select; $_i++ )
        {
            $_index = $_array[$_i];

            fwrite ( $_fp, $input_array[$_index -1]." " );
        }

        fwrite ( $_fp, "\n" );

        // generate next combination in lexicographical order
        // start at last item
        $_i = $select - 1;

        // find next item to increment
        while ( $_array[$_i] == ( $_number - $select + $_i + 1 ) )
        {
            $_i--;
        }

        // all done
        if ( $_i < 0 )
        {
            break;
        }

        // increment
        $_array[$_i] = $_array[$_i] + 1;
        // do next
        for ( $_j = $_i + 1; $_j < $select; $_j++ )
        {
            $_array[$_j] = $_array[$_i] + $_j - $_i;
        }
    }

    fclose ( $_fp );

    return $output;
}                                                  

Cisco Certified Network Associate

話說 還在抱怨近來的不爭氣,
"馬上"就又去考了CCNA...
不過接下來將開始做點正事了,
下半年將會硬梆梆, 真是由硬入軟易, 由軟入硬難...

Google台灣演說

以前很少聽到台灣Google的人發言,
但最近有幸聽到幾場演說, 在此筆記一下...

林一平@TANET 2007: Issues on Mobile All-IP Networks
Ray Chen@OSDC 2008: Google Gears
李開復@NTU: Cloud Computing
翟本喬@EAF嵌入式應用論壇: 消費性電子設備的網路服務