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首先说一下直接提示用户下载文件的功能，没有多说的，就是往http的response头里增加两句话，用django的语法写就是：

        response = HttpResponse(text, mimetype='application/octet-stream')
        response['Content-Disposition'] = 'attachment; filename=%s' %filename.encode('utf8')
        return response

此外，网上说django上传文件的介绍似乎都是1.o之前的方法，最后还是直接看官方文档比较准确，文档在这里：http://docs.djangoproject.com/en/dev/topics/http/file-uploads/，这里简单说一下，首先是form，没有什么特别的：

<form enctype=”multipart/form-data” action=”/someurl” method=”post”>
<input type=”file” name=”file”/>
…
</form>

然后，在views中可以直接读文件内容和文件名：

        text = file_obj.read()
        filename = file_obj.name

在默认情况下，小于2.5M的文件会存放到内存里，如果文件比较大则会存放为临时文件，对大文件最好不要直接read，而是用chunks方式读取，详细还是要读文档。

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雖然 TortoiseSVN 有提供 Create Patch 與 Apply Patch 等功能，不過客戶端的正式主機幾乎都沒有安裝 TortoiseSVN 軟體，所以可說是英雄無用武之地。所以長久以來，我一直苦苦追尋這樣的功能：「如何才能讓 TortoiseSVN 僅匯出新增或修改過的檔案呢？」這個功能我已經找了一年多了，好幾次有股衝動想寫這樣的軟體出來，因為每次要匯出差異的檔案真的很麻煩。

用繁体转简体工具转换后：

虽然 TortoiseSVN 有提供 Create Patch 与 Apply Patch 等功能，不过客户端的正式主机几乎都没有安装 TortoiseSVN 软件，所以可说是英雄无用武之地。所以长久以来，我一直苦苦追寻这样的功能：「如何才能让 TortoiseSVN 仅导出新增或修改过的文件呢？」这个功能我已经找了一年多了，好几次有股冲动想写这样的软件出来，因为每次要导出差异的文件真的很麻烦。

感觉很不错，结果比较满意。

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感觉用Django开发还真的蛮简洁的，代码量极少。部署稍微有点罗嗦，因为模板文件和应用都不在一个目录里，前几天写的上传工作拷贝修改的文件起了作用，一个命令就能全部部署上去。

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(r’^css/(?P<path>.*)$’, ‘django.views.static.serve’,{‘document_root’: ‘F:/rocksun/rstools/template/css’}),
(r’^images/(?P<path>.*)$’, ‘django.views.static.serve’,{‘document_root’: ‘F:/rocksun/rstools/template/images’}),

这样设置之后，模板中对于/css的请求就会进入我设置的F:/rocksun/rstools/template/css目录下，同理images，不需要设置media目录了。

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这里是一个很好的教程，我说一下我遇到的一些问题，因为我的应用不是存放在根下面的，而是在rstools目录下，所以我的rstools目录下的.htaccess文件内容如下：

RewriteEngine On
RewriteBase /rstools/
RewriteRule ^(dispatch\.fcgi/.*)$ – [L]
RewriteRule ^(.*)$ /rstools/dispatch.fcgi/$1 [L]

然后因为我的FastCGI没有开启，所以会报告如下错误：

mod_rewrite: maximum
number of internal redirects reached. Assuming configuration error. Use ‘Rewrite
Options MaxRedirects’ to increase the limit if neccessary.

FastCGI没有开启时另一个症状是直接访问dispach.fcgi则会返回其文件内容，而不是执行的结果。在DreamHost的控制面板中打开FastCGI就可以解决这个问题。

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Where to get start?

First, I know I will filter the source, so I regist the filter with this function:

add_filter('the_content','filter_shrink');

The “the_content” is the filter’s name, and filter_shrink is my filter function, I will write it later. Then I should could change the width and height from option page, so I write:

add_action('admin_menu', 'flash_zoom_options_page');

This function told wordpress I will regist a menu in “admin_menu” with the flash_zoom_options_page function.

implements the functions

Now let’s see the filter_shrink:

function replaceSize($matches)
{
  global $flashzoom_settings;
  $replaceStr = ' width="'.$flashzoom_settings['target_width'].'" height="'.$flashzoom_settings['target_height'].'" ';
  return $matches[1].$replaceStr.$matches[3].$replaceStr.$matches[5];
}

function filter_shrink($content) {
    global $flashzoom_settings;
    if(is_home()){
      $content = preg_replace_callback(
           '|(<'.'object.*)(width="d*"s*height="d*")(.*)(width="d*"s*height="d*")(.*</object>)|',
            "replaceSize",
            $content);
    }

    return $content;
}

Look at the “$flashzoom_settings”, it is the length and height that stored in wordpress. I just use preg_replace_callback function to replace the origin width and height. The php regexp is strange, especially the usage of “|”.

Then we can see the flash_zoom_options_page function:

function isInteger($input){
  return preg_match('@^[-]?[0-9]+$@',trim($input)) === 1;
}

function flash_zoom_options_page() {
		add_options_page('FlashZoom', 'FlashZoom', 8, basename(__FILE__), 'flash_zoom_options_subpanel');
}

function flash_zoom_options_subpanel() {
	global $ol_flash, $flashzoom_settings, $_POST, $wp_rewrite;

	if (current_user_can('activate_plugins')) {
		// Easiest test to see if we have been submitted to
		if(isset($_POST['target_width']) || isset($_POST['target_height'])) {
		  if(!isInteger($_POST['target_width'])||!isInteger($_POST['target_height'])){
		    $ol_flash = "Please input the number!";
		  }else{
			// Now we check the hash, to make sure we are not getting CSRF
			  if(fb_is_hash_valid($_POST['token'])) {
				  if (isset($_POST['target_width'])) {
					  $flashzoom_settings['target_width'] = $_POST['target_width'];
					  update_option('flashzoom_settings',$flashzoom_settings);
					  $ol_flash = "Your settings have been saved.";
				  }
				  if (isset($_POST['target_height'])) {
					  $flashzoom_settings['target_height'] = $_POST['target_height'];
					  update_option('flashzoom_settings',$flashzoom_settings);
					  $ol_flash = "Your settings have been saved.";
				  }
			  } else {
				  // Invalid form hash, possible CSRF attempt
				  $ol_flash = "Security hash missing.";
			  } // endif fb_is_hash_valid
			} //endif isInteger
		} // endif isset(feedburner_url)
	} else {
		$ol_flash = "You don't have enough access rights.";
	}
	if ($ol_flash != '') echo '


' . $ol_flash . '

';

	if (current_user_can('activate_plugins')) {
	  $temp_hash = fb_generate_hash();
		fb_store_hash($temp_hash);
		echo '
';
		echo '
Set Up Flash Zoom Size

';
		echo '






Target Width




Target Height








';
		echo '

';
	} else {
		echo '


Sorry, you are not allowed to access this page.

';
	}

}

The flash_zoom_options_page function create an panel flash_zoom_options_subpanel, and the first part of flash_zoom_options_subpanel will check the parameters and store it into database, the other part will display the form.

We have not use the install step, so we add these two lines .

add_option('flashzoom_settings',$data,'FlashZoom Options');
$flashzoom_settings = get_option('flashzoom_settings');

Last, don’t forget the plugin header,  so the wordpress can recognize the plugin. The full plugin is:

/*
Plugin Name: Flash Zoom
Plugin URI: http://rocksun.cn/flash-zoom/
Description: zoom the flash in homepage.
Version: 0.8
Author: Rock Sun
Author URI: http://rocksun.cn/
*/

add_option('flashzoom_settings',$data,'FlashZoom Options');
$flashzoom_settings = get_option('flashzoom_settings');

function isInteger($input){
  return preg_match('@^[-]?[0-9]+$@',trim($input)) === 1;
}

function flash_zoom_options_page() {
		add_options_page('FlashZoom', 'FlashZoom', 8, basename(__FILE__), 'flash_zoom_options_subpanel');
}

function flash_zoom_options_subpanel() {
	global $ol_flash, $flashzoom_settings, $_POST, $wp_rewrite;

	if (current_user_can('activate_plugins')) {
		// Easiest test to see if we have been submitted to
		if(isset($_POST['target_width']) || isset($_POST['target_height'])) {
		  if(!isInteger($_POST['target_width'])||!isInteger($_POST['target_height'])){
		    $ol_flash = "Please input the number!";
		  }else{
			// Now we check the hash, to make sure we are not getting CSRF
			  if(fb_is_hash_valid($_POST['token'])) {
				  if (isset($_POST['target_width'])) {
					  $flashzoom_settings['target_width'] = $_POST['target_width'];
					  update_option('flashzoom_settings',$flashzoom_settings);
					  $ol_flash = "Your settings have been saved.";
				  }
				  if (isset($_POST['target_height'])) {
					  $flashzoom_settings['target_height'] = $_POST['target_height'];
					  update_option('flashzoom_settings',$flashzoom_settings);
					  $ol_flash = "Your settings have been saved.";
				  }
			  } else {
				  // Invalid form hash, possible CSRF attempt
				  $ol_flash = "Security hash missing.";
			  } // endif fb_is_hash_valid
			} //endif isInteger
		} // endif isset(feedburner_url)
	} else {
		$ol_flash = "You don't have enough access rights.";
	}
	if ($ol_flash != '') echo '


' . $ol_flash . '

';

	if (current_user_can('activate_plugins')) {
	  $temp_hash = fb_generate_hash();
		fb_store_hash($temp_hash);
		echo '
';
		echo '
Set Up Flash Zoom Size

';
		echo '






Target Width




Target Height








';
		echo '

';
	} else {
		echo '


Sorry, you are not allowed to access this page.

';
	}

}

function replaceSize($matches)
{
  global $flashzoom_settings;
  $replaceStr = ' width="'.$flashzoom_settings['target_width'].'" height="'.$flashzoom_settings['target_height'].'" ';
  return $matches[1].$replaceStr.$matches[3].$replaceStr.$matches[5];
}

function filter_shrink($content) {
    global $flashzoom_settings;
    if(is_home()){
      $content = preg_replace_callback(
           '|('.'

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因为从2.0就开始使用wordpress了，那时使用的数据库编码经常不是utf8的，所以创建表的语句就象这样：

CREATE TABLE `rs_comments` (
`comment_ID` bigint(20) unsigned NOT NULL auto_increment,
`comment_post_ID` int(11) NOT NULL default '0',
`comment_author` tinytext collate latin1_general_ci NOT NULL,
`comment_author_email` varchar(100) collate latin1_general_ci NOT NULL default '',
`comment_author_url` varchar(200) collate latin1_general_ci NOT NULL default '',
`comment_author_IP` varchar(100) collate latin1_general_ci NOT NULL default '',
`comment_date` datetime NOT NULL default '0000-00-00 00:00:00',
`comment_date_gmt` datetime NOT NULL default '0000-00-00 00:00:00',
`comment_content` text collate latin1_general_ci NOT NULL,
`comment_karma` int(11) NOT NULL default '0',
`comment_approved` enum('0','1','spam') collate latin1_general_ci NOT NULL default '1',
`comment_agent` varchar(255) collate latin1_general_ci NOT NULL default '',
`comment_type` varchar(20) collate latin1_general_ci NOT NULL default '',
`comment_parent` bigint(20) NOT NULL default '0',
`user_id` bigint(20) NOT NULL default '0',
PRIMARY KEY  (`comment_ID`),
KEY `comment_approved` (`comment_approved`),
KEY `comment_post_ID` (`comment_post_ID`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_general_ci AUTO_INCREMENT=40397 ;

而最新的wordpress，导出来的表对应的都是utf8编码的，所以应该把上述语句替换为：

CREATE TABLE `rs_comments` (
`comment_ID` bigint(20) unsigned NOT NULL auto_increment,
`comment_post_ID` int(11) NOT NULL default '0',
`comment_author` tinytext  NOT NULL,
`comment_author_email` varchar(100)  NOT NULL default '',
`comment_author_url` varchar(200)  NOT NULL default '',
`comment_author_IP` varchar(100)  NOT NULL default '',
`comment_date` datetime NOT NULL default '0000-00-00 00:00:00',
`comment_date_gmt` datetime NOT NULL default '0000-00-00 00:00:00',
`comment_content` text  NOT NULL,
`comment_karma` int(11) NOT NULL default '0',
`comment_approved` enum('0','1','spam')  NOT NULL default '1',
`comment_agent` varchar(255)  NOT NULL default '',
`comment_type` varchar(20)  NOT NULL default '',
`comment_parent` bigint(20) NOT NULL default '0',
`user_id` bigint(20) NOT NULL default '0',
PRIMARY KEY  (`comment_ID`),
KEY `comment_approved` (`comment_approved`),
KEY `comment_post_ID` (`comment_post_ID`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=40397 ;

注意我的单个字段也有编码设置，应该都清除掉。然后我们就把这些数据用phpmyadmin导入到数据库里，如果顺利地话通过phpmyadmin 看到的都是正常的汉字。然后升级文件，网上提到要修改wp-config的设置，我觉得那都不是长远之计，最好不修改。把最新版本的wp-config- sample.php，改名为wp-config.php，然后修改其中的数据库连接信息，上传到服务器上就好了。跑到wp-admin下就会自动提示需要升级结构，点确定就可以了，然后我们就有了完全utf8环境的wordpress了。

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.cryptocversion.c(105) : warning C4129: ‘o’ : unrecognized character
escape sequence
NMAKE : fatal error U1077: ‘cl’ : return code ‘0×2′

我感到自己好像没有错啊，就去google，倒是有人也发现这个问题了，不过似乎没有答案。无法，回来再看，无奈之间打开了那个出错的文件cversion.c，发现了一段问题，里面似乎要一个路径，但是那段宏的引用感觉有些蹊跷，突然想起来了，那个路径？起初我的路径是这么写的：

perl Configure VC-WIN32 –prefix=F:toolssvnopenssl-0.9.8hbin

然后修改了一下：

perl Configure VC-WIN32 –prefix=F:/tools/svn/openssl-0.9.8h/bin

再编译，没有问题了，唉，那个脚本对“”的处理有问题。

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