IT博客网-asfman-文章分类-asp(javascrpt)

编码的原理　　BASE64

汪杰 — Tue, 18 Mar 2008 14:35:00 GMT

BASE64编码的原理很简单，其方法是，将输入数据流每次取6 bit（每bit代表1位二进制），不足6bit的补0，这样，每3个8位字节将编码为4个6位字节（3×8 → 4×6）；不满4个字节的以“=”填充。其实这4个六位字节仍然是8位，只不过高两位被设置为0。当一个字节只有6位有效时，它的取值空间为0 到 2的6次方减1 即63，也就是说被转换的Base64编码的每一个编码的取值空间为（0~63）。事实上，0~63之间的ASCII码有许多不可见字符，所以应该再做一个映射，映射表（码表）为

Table 1: The Base64 Alphabet
Value Encoding Value Encoding Value Encoding Value Encoding
0 A 17 R 34 i 51 z
1 B 18 S 35 j 52 0
2 C 19 T 36 k 53 1
3 D 20 U 37 l 54 2
4 E 21 V 38 m 55 3
5 F 22 W 39 n 56 4
6 G 23 X 40 o 57 5
7 H 24 Y 41 p 58 6
8 I 25 Z 42 q 59 7
9 J 26 a 43 r 60 8
10 K 27 b 44 s 61 9
11 L 28 c 45 t 62 +
12 M 29 d 46 u 63 /
13 N 30 e 47 v (pad) =
14 O 31 f 48 w
15 P 32 g 49 x
16 Q 33 h 50 y

这样就可以将3个8位字节，转换为4个可见字符。也就是说，转换后的字符串要比原来的长1/3，扩张率为3:4。举例说明：　　1、当字符串字符个数为3的倍数时；比如字符串“ABC”，其在计算机内存中的十六进制表示为$41、$42、$43，十进制表示为“65”“66”“67”；二进制表示为01000001　　01000010　　01000011　　将这三个二进制数依次取6bit，　　010000/01　　0100/0010　　01/000011　　就转换成了：　　010000　　010100　　001001　　000011　　将这四个二进制数转换成十六制数为：$10，$14，$9，$3，十进制数位为16，20，9，3。对照上面的码表，分别查找出对应的字符为Q，U，J，D。也是就说字符串“ABC”经过BASE64编码后得出“QUJD”。　　这是最简单的情况，即ASCII码字符数刚好可以被3整除。接着继续讨论余数为2、为1的情况。　　2、当余数为2时，比如字符串“ce”，其在内存中十六进制表示为$63，$65；十进制表示表示99，101；二进制表示为　　01100011　01100101　依次取6bit　011000/11　0110/0101　　这时，第3个字符不足6位，在后面补零，也就是0101变成010100。转换结果为　　011000　110110　010100　　这3个二进制数转换成十六制数为$18，$36，$14；十进制数位为24，54，20。对照码表得出结果“Y2U”。编码后的字符个数不足4位，用“＝”填充，最后编码得出“Y2U=”。　　3、当余数为1时，比如字符串“{”，其在内存中的十六进制表示为$7B，十进制为123，二进制位表示为　　01111011　依次取6bit　011110/11　　　补0后为　011110/110000　　转换结果为011110和110000　　这两个二进制数转换成十六进制数为$1E，$30，十进制数为30，48。对照码表得出结果为“ew”，补上“＝”，最后编码得出“ew= =”。　　解码也很简单，是编码的逆过程，即将每个字符对照码表换算成6bit的二进制数，然后重组起来，按8位进行截取，得出原码。

二、BASE64编码的实现方法　　BASE64编码的实现方法很多，但大多基于二进制数的移位、与或操作，不便于理解。为此，本人经过摸索，想出了一种基于十进制下的易于掌握的编码方法。根据上述原理，每3个字节将转换成４个字节，也就是说每一个半字节（12bit）正好转换成2个编码后的字符（２×6bit）。在十六进制下半个字节可用0~F表示。为此，依次取字符串在十六进制表示下的三位，通过整除和取余运算很容易得出编码后的2个字符。　　比如字符串ABC，其十六进制在内存中表示$414243，依次取3位，得出结果为$414和$243，转换成十进制为1044和579。将这两个数分别与64进行整除和取余运算　　1044　Div　64=16　　1044　Mod　64=20 　　 579　Div　64=9　　　579　Mod　64=3　　得出结果为16，20，9，3。对照上面的码表，编码结果同样为“QUJD”。　　在高级语言中，很容易将字符串的十六进制以字符串形式表达出来，然后通过依次截取3个字符转换成整数，最后进行上述运算得出结果。

汪杰 2008-03-18 22:35 发表评论

404 and execute,transfer

汪杰 — Tue, 18 Mar 2008 05:42:00 GMT

      假如我输入http://localhost/add.htm 这个页面不存在，那么转向404自定义页面处理，处理页面通过query_string获到的内容为：404;http://localhost/add.htm 然后可以通过分析这个字符串就行转向处理，通过Execute,transfer的asp都可以通过query_string来获得
这个字符串。
    Execute,Transfer转向的页面不能传递、获取主页面的变量。
    Eexucute执行转向那个页面，执行完后返回所有内容回主页面，然后主页面接着处理。
    Transfer执行转向那个页面，执行完后返回所有内容回主页面，然后主页面停止处理后面代码。

汪杰 2008-03-18 13:42 发表评论

关于mdb里的乱码

汪杰 — Mon, 17 Dec 2007 11:30:00 GMT

只要mdb字段打开是正常字符，那么无论用什么编码读取都会正常，除非codepage设置与meta，和charset

设置不一置。
乱码情况：
当一个页面以utf8显示，发送字符到后台asp文件，而后台asp文件是gb2312编码，这时读取到的字符为乱码，存入数据库，数据库显示也乱码。
当我们设置读取页面的codepage为gb2312，然后设置meta和charset为utf-8会显示正常

汪杰 2007-12-17 19:30 发表评论

向游览器输出excel

汪杰 — Sat, 17 Nov 2007 00:54:00 GMT

以下步骤说明了如何使用此方法向浏览器写入一个 Excel 文件：

创建一个新的 ASP 页并粘贴以下代码：


            <%
            'Set the content type to the specific type that you are sending.
            Response.ContentType = "application/x-msexcel"
            Const adTypeBinary = 1
            Dim strFilePath
            strFilePath = "C:\ExcelFiles\Excel1.xls" 'This is the path to the file on disk.
            Set objStream = Server.CreateObject("ADODB.Stream")
            objStream.Open
            objStream.Type = adTypeBinary
            objStream.LoadFromFile strFilePath
            Response.BinaryWrite objStream.Read
            objStream.Close
            Set objStream = Nothing
            %>

2. 将该文件保存到 Web 服务器。

3. 在浏览器中，浏览到该文件。

汪杰 2007-11-17 08:54 发表评论

about stream read bytes

汪杰 — Fri, 16 Nov 2007 16:17:00 GMT

stream object only can write original bytes data,using midb intercepts bytes data cannot use
eg:
pData = Midb(sData,1,100)
pData cannot use width Stream' Write method

汪杰 2007-11-17 00:17 发表评论

创建数据库表组件

汪杰 — Wed, 14 Nov 2007 08:44:00 GMT

示例：createTable("fk.mdb","fk3",{name:"varchar",value:"Text"},false);

汪杰 2007-11-14 16:44 发表评论

http headers reference

汪杰 — Tue, 13 Nov 2007 01:45:00 GMT

Application Center Test

HTTP Headers Reference

Both HTTP requests and HTTP responses use headers to send information about the HTTP message. A header is a series of lines, with each line containing a name followed by a colon and a space, and then a value. The fields can be arranged in any order. Some header fields are used in both request and response headers, while others are appropriate only for either a request or a response.

Many request header fields will allow the client to specify several acceptable options in the value part and, in some cases, even rank each option's preference. Multiple items are separated using a comma. For example, a client could send a request header that includes "Content-Encoding: gzip, compress," indicating it would accept either type of compression. If the server uses gzip encoding for the response body, its response header would include "Content-Encoding: gzip".

Some fields can occur more than once in a single header. For example, a header can have multiple "Warning" fields.

The following tables list HTTP 1.1 header fields. Note that some header fields are MIME fields. MIME fields are defined in the Internet Engineering Task Force (IETF) document RFC 2045, but they are also used by the HTTP 1.1 protocol. See the IETF page for more information about the MIME and HTTP 1.1 specifications.

General Header Fields

General header fields can be used in request messages and response messages.

Name	Example Value
Cache-Control	"max-age=10"
Connection	"close"
Date	"Tue, 11 Jul 2000 18:23:51 GMT"
Pragma	"no-cache"
Trailer	"Date"
Transfer-Encoding	"chunked"
Upgrade	"SHTTP/1.3"
Via	"HTTP/1.1 Proxy1, HTTP/1.1 Proxy2"
Warning	"112 Disconnected Operation"

Request Header Fields

Request header fields are used in request messages only.

Name	Example Value
Accept	"text/html, image/*"
Accept-Charset	"iso8859-5"
Accept-Encoding	"gzip, compress"
Accept-Language	"en, fr"
Authorization	[credentials]
Content-Encoding	"gzip"
Expect	"100-continue"
From	"user@microsoft.com"
Host	"www.microsoft.com"
If-Match	"entity_tag001"
If-Modified-Since	"Tue, 11 Jul 2000 18:23:51 GMT"
If-None-Match	"entity_tag001"
If-Range	"entity_tag001" or "Tue, 11 Jul 2000 18:23:51 GMT"
If-Unmodified-Since	"Tue, 11 Jul 2000 18:23:51 GMT"
Max-Forwards	"3"
Proxy-Authorization	[credentials]
Range	"bytes=100-599"
Referer	"http://www.microsoft.com/resources.asp"
TE	"trailers"
User-Agent	"Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 5.0)"

Response Header Fields

Response header fields are used in response messages only.

Name	Example Value
Accept-Ranges	"none"
Age	"2147483648(2^31)"
ETag	"b38b9-17dd-367c5dcd"
Last-Modified	"Tue, 11 Jul 2000 18:23:51 GMT"
Location	"http://localhost/redirecttarget.asp"
Proxy-Authenticate	[challenge]
Retry-After	"Tue, 11 Jul 2000 18:23:51 GMT" or "60"
Server	"Microsoft-IIS/5.0"
Vary	"Date"
WWW-Authenticate	[challenge]

Entity Header Fields

Entity header fields can be used in request messages or response messages. Entity header fields contain information about the entity-body of the message, such as the encoding format used.

Name	Example Value
Allow	"GET, HEAD"
Content-Encoding	"gzip"
Content-Language	"en"
Content-Length	"8445"
Content-Location	"http://localhost/page.asp"
Content-MD5	[md5-digest]
Content-Range	"bytes 2543-4532/7898"
Content-Type	"text/html"
Expires	"Tue, 11 Jul 2000 18:23:51 GMT"
Last-Modified	"Tue, 11 Jul 2000 18:23:51 GMT"

Request Header Example

The following is a simple example of an HTTP request.

Copy Code

GET /articles/news/today.asp HTTP/1.1

Copy Code

Accept: */*

Copy Code

Accept-Language: en-us

Copy Code

Connection: Keep-Alive

Copy Code

Host: localhost

Copy Code

Referer: http://localhost/links.asp

Copy Code

User-Agent: Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 5.0)

Copy Code

Accept-Encoding: gzip, deflate

This request has a request-line, which includes the method (GET), the resource path (/articles/news/today.asp) and the HTTP version (HTTP/1.1). Everything after the request-line is part of the header, since this request does not have a body. Following the header is an empty line, which marks the end of the headers.

Response Header Example

The Web server could respond to the previous request in a number of ways. Assuming the file was accessible and the user had rights to view it, the response would be similar to the following:

Copy Code

HTTP/1.1 200 OK

Copy Code

Server: Microsoft-IIS/5.0

Copy Code

Date: Thu, 13 Jul 2000 05:46:53 GMT

Copy Code

Content-Length: 2291

Copy Code

Content-Type: text/html

Copy Code

Set-Cookie: ASPSESSIONIDQQGGGNCG=LKLDFFKCINFLDMFHCBCBMFLJ; path=/

Copy Code

Cache-control: private

Copy Code

...

The first line of the response is called the status-line. It contains the HTTP version used for the response, the status code (200), and the reason phrase. There is a header, with five fields in this example, followed by an empty line (a carriage return and line feed) and then the first two lines of the response body.

http response headers

汪杰 — Tue, 13 Nov 2007 01:35:00 GMT

HTTP Response Headers

The following list contains valid HTTP response headers. Use these headers to provide information about your HTML document in a meta tag, or to gather information about another document using HttpQueryInfo and QueryInfo.

Constants

ACCEPT (24)
Acceptable media types.

ACCEPT-CHARSET (25)
Acceptable character sets.

ACCEPT-ENCODING (26)
Acceptable content-coding values.

ACCEPT-LANGUAGE (27)
Acceptable natural languages.

ACCEPT-RANGES (42)
Types of range requests that are accepted.

AGE (48)
An estimate of the amount of time since the response was generated at the origin server.

ALLOW (7)
Methods supported by the server.

AUTHORIZATION (28)
Authorization credentials used for a request.

CACHE-CONTROL (49)
Cache control directives.

CONNECTION (23)
Options that are specified for a particular connection and must not be communicated by proxies over further connections.

CONTENT-BASE (50)
Base Uniform Resource Identifier (URI) for resolving relative URLs within the entity.

CONTENT-DESCRIPTION (4)
Obsolete. Maintained for legacy application compatibility only.

CONTENT-DISPOSITION (47)
Obsolete. Maintained for legacy application compatibility only.

CONTENT-ENCODING (29)
Any additional content codings that have been applied to the entire resource.

CONTENT-ID (3)
Content identification.

CONTENT-LANGUAGE (6)
Language in which the content is presented.

CONTENT-LENGTH (5)
Size of the resource, in bytes.

CONTENT-LOCATION (51)
Resource location for the entity enclosed in the message.

CONTENT-MD5 (52)
MD5 digest of the entity-body for the purpose of providing an end-to-end message integrity check (MIC) for the entity-body. For more information, see RFC1864, The Content-MD5 Header Field, at http://ftp.isi.edu/in-notes/rfc1864.txt .

CONTENT-RANGE (53)
Location in the full entity-body where the partial entity-body should be inserted and the total size of the full entity-body.

CONTENT-TRANSFER_ENCODING (2)
Additional content coding that has been applied to the resource.

CONTENT-TYPE (1)
Content type of the resource (such as text/html).

COOKIE (44)
Cookies associated with the request.

COST (15)
Not supported.

DATE (9)
Date and time at which the message was originated.

DERIVED-FROM (14)
Not supported.

ECHO-HEADERS (73)
Not implemented.

ECHO-HEADERS-CRLF (74)
Not implemented.

ECHO-REPLY (72)
Not implemented.

ECHO-REQUEST (71)
Not implemented.

ETAG (54)
Entity tag for the associated entity.

EXPECT (68)
Expect header, which indicates whether the client application should expect 100 series responses.

EXPIRES (10)
Date and time after which the resource should be considered outdated.

FORWARDED (30)
Obsolete. Maintained for legacy application compatibility only.

FROM (31)
E-mail address for the human user who controls the requesting user agent if the From header is given.

HOST (55)
Internet host and port number of the resource being requested.

IF-MATCH (56)
Contents of the If-Match request-header field.

IF-MODIFIED-SINCE (32)
Contents of the If-Modified-Since header.

IF-NONE-MATCH (57)
Contents of the If-None-Match request-header field.

IF-RANGE (58)
Contents of the If-Range request-header field. This header allows the client application to check if the entity related to a partial copy of the entity in the client application's cache has not been updated. If the entity has not been updated, send the parts that the client application is missing. If the entity has been updated, send the entire updated entity.

IF-UNMODIFIED-SINCE (59)
Contents of the If-Unmodified-Since request-header field.

LAST-MODIFIED (11)
Date and time at which the server believes the resource was last modified.

LINK (16)
Obsolete. Maintained for legacy application compatibility only.

LOCATION (33)
Absolute URI.

MAX (75)
Not a query flag. Indicates the maximum value of an * value.

MAX-FORWARDS (60)
Number of proxies or gateways that can forward the request to the next inbound server.

MESSAGE-ID (12)
Not supported.

MIME-VERSION (0)
Version of the MIME protocol that was used to construct the message.

MSTHEMECOMPATIBLE
Microsoft Internet Explorer 6 and later. Disables theming support for a Web page. The content attribute of the meta element must be set to no.

ORIG-URI (34)
Obsolete. Maintained for legacy application compatibility only.

PRAGMA (17)
Implementation-specific directives that might apply to any recipient along the request/response chain.

PROXY-AUTHENTICATE (41)
Authentication scheme and realm returned by the proxy.

PROXY-AUTHORIZATION (61)
Header that is used to identify the user to a proxy that requires authentication. This header can only be retrieved before the request is sent to the server.

PROXY-CONNECTION (69)
Proxy-Connection header.

PUBLIC (8)
Methods available at this server.

RANGE (62)
Byte range of an entity.

RAW-HEADERS (21)
All the headers returned by the server. Each header is terminated by "\0". An additional "\0" terminates the list of headers.

RAW-HEADERS-CRLF (22)
All the headers returned by the server. Each header is separated by a carriage return/line feed (CR/LF) sequence.

REFERER (35)
URI of the resource where the requested URI was obtained.

REFRESH (46)
Obsolete. Maintained for legacy application compatibility only.

REQUEST-METHOD (45)
Verb that is used in the request, typically GET or POST.

RETRY-AFTER (36)
Amount of time the service is expected to be unavailable.

SERVER (37)
Information about the software used by the origin server to handle the request.

SET-COOKIE (43)
Value of the cookie set for the request.

STATUS-CODE (19)
Status code returned by the server. For a list of possible values, see HTTP Status Codes.

STATUS-TEXT (20)
Any additional text returned by the server on the response line.

TITLE (38)
Obsolete. Maintained for legacy application compatibility only.

TRANSFER-ENCODING (63)
Type of transformation that has been applied to the message body so it can be safely transferred between the sender and recipient.

UNLESS-MODIFIED-SINCE (70)
Unless-Modified-Since header.

UPGRADE (64)
Additional communication protocols that are supported by the server.

URI (13)
Some or all of the URIs by which the Request-URI resource can be identified.

USER-AGENT (39)
Information about the user agent that made the request.

VARY (65)
Header that indicates that the entity was selected from a number of available representations of the response using server-driven negotiation.

VERSION (18)
Last response code returned by the server.

VIA (66)
Intermediate protocols and recipients between the user agent and the server on requests, and between the origin server and the client on responses.

WARNING (67)
Additional information about the status of a response that might not be reflected by the response status code.

WWW-AUTHENTICATE (40)
Authentication scheme and realm returned by the server.

Remarks

A response header can be created using the HTTP-EQUIV attribute of the meta tag.

Corresponding values are provided for use with HttpQueryInfo and QueryInfo.

In Internet Explorer 6, The MSTHEMECOMPATIBLE constant disables theming support within Web pages.

汪杰 2007-11-13 09:35 发表评论

just CusorType=1 will be ok

汪杰 — Thu, 08 Nov 2007 01:00:00 GMT

当直接使用ActiveConnection的Execute时需要设置CursorLocation=3客户端游标，否这RecordCoun返回-1

当使用rs.Open(),只要设置CusorType=1 然后设置LockType=3就通用了
，如果不设置CusorType结果就会返回-1。所以通用设置为：
CursorType=1;
LockType=3;
CursorLocation=2//默认也是2 ，所设置不设置无所谓
var sql = "select * from messages order by id desc";
var Rs= Server.CreateObject("ADOR.RecordSet");
Rs.ActiveConnection=DH.ConnStr;
Rs.CursorType = 1;
Rs.LockType = 3;
//Rs.CursorLocation = 2;
Rs.Source = sql;
Rs.Open();
Response.Write(Rs.CursorType+"
");
Response.Write(Rs.LockType+"
");
Response.Write(Rs.CursorLocation+"
");
Response.Write(Rs.RecordCount);

汪杰 2007-11-08 09:00 发表评论

jscript ado && adox 应用的几个技巧

汪杰 — Sun, 04 Nov 2007 15:25:00 GMT

摘要: 说明: 本文介绍了几个 asp/jscript 使用 ado 操作数据库表的实用技巧. 主要为: GetRows() GetString() Save() Open() 及 adox 操作数据库的实用技巧, 为建,删,改视图. 建库建表+栏 &nbs... 阅读全文

汪杰 2007-11-04 23:25 发表评论

服务端 jscript 生成随机数图片验证码 by shawl.qiu

汪杰 — Sun, 04 Nov 2007 15:21:00 GMT

http://blog.csdn.net/btbtd/archive/2007/01/04/1473710.aspx
说明:
其实这个程序只是从某人写的一个VBScript程序改写成 Jscript 而已, 可以说不是我写的, 只是改改而已...
至于VBScript版原作者是谁, 我不知道(现在的网络转载大都没署原作来历)...

原理嘛, 就是预存0-9的十六进制数据在数组A里,
然后生成一个随机数,
把随机数存放进 Session 里, 以备进行提交检验,
再生成一个数组B, 数组B内容的每个项对应随机数的一个字符.
然后循环输出数组A, 以数组B的每一个项内容访问存放十六进制数组A的数据,
最后使用 xbm 格式输出图片数据.

鄙人弄了一个演示, 共两个文件.
test.asp 调用生成随机图片数据.
checkcode.asp 生成随机图片数据.

下载原格式:
http://files.myopera.com/btbtd/jscript_ss/function/jscript_rnd_num_pic_validator.7z

目录:
1. test.asp 源代码
2. checkcode.asp 源代码

shawl.qiu
2007-01-04
http://blog.csdn.net/btbtd

1. test.asp 源代码

<%@LANGUAGE="JAVASCRIPT" CODEPAGE="65001"%>
DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>shawl.qiu templatetitle>
head>
<body>
<%
var sCk=Request.QueryString('id')+'';
switch(sCk){
case 'check':
Response.write("Session('checkcode'): "+Session('checkcode'));
Response.write("<br/>Request.Form('checkcode'): "+Request.Form('checkcode'));
break;
default:
%>
<img src='checkcode.asp' />
<form action='?id=check' method='post'>
the code:<input type='text' size='4' name='checkcode'/>
<input type='submit' /> type='reset' />
form>
<%
}
%>
body>
html>

2. checkcode.asp 源代码

<%@LANGUAGE="JAVASCRIPT" CODEPAGE="65001"%>
<%
checkcode(1000,9999,'checkcode');
function checkcode(nStart, nOver, sSession){
if(!nStart) nStart=1000;
if(!nOver) nOver=9999;
if(!sSession) sSession='checkcode';
var ar=[10];
//0
ar[0]=new Array('0x3c', '0x66', '0xc3', '0xc3', '0xc3', '0xc3', '0xc3', '0xc3', '0x66', '0x3c');
//1
ar[1]=new Array('0x18', '0x1c', '0x18', '0x18', '0x18', '0x18', '0x18', '0x18', '0x18', '0x7e');
//2
ar[2]=new Array('0x3c', '0x66', '0x60', '0x60', '0x30', '0x18', '0x0c', '0x06', '0x06', '0x7e');
//3
ar[3]=new Array('0x3c', '0x66', '0xc0', '0x60', '0x1c', '0x60', '0xc0', '0xc0', '0x66', '0x38');
//4
ar[4]=new Array('0x38', '0x3c', '0x36', '0x33', '0x33', '0x33', '0xff', '0x30', '0x30', '0xfe');
//5
ar[5]=new Array('0xfe', '0xfe', '0x06', '0x06', '0x3e', '0x60', '0xc0', '0xc3', '0x66', '0x3c');
//6
ar[6]=new Array('0x60', '0x30', '0x18', '0x0c', '0x3e', '0x63', '0xc3', '0xc3', '0x66', '0x3c');
//7
ar[7]=new Array('0xff', '0xc0', '0x60', '0x30', '0x18', '0x18', '0x18', '0x18', '0x18', '0x18');
//8
ar[8]=new Array('0x3c', '0x66', '0xc3', '0x66', '0x3c', '0x66', '0xc3', '0xc3', '0x66', '0x3c');
//9
ar[9]=new Array('0x3c', '0x66', '0xc3', '0xc3', '0x66', '0x3c', '0x18', '0x0c', '0x06', '0x03');
//Response.Buffer = false;
with(Response){
Expires = -1 ;
AddHeader("Pragma","no-cache") ;
AddHeader("cache-ctrol","no-cache");
}
var nNum=fRandomBy(nStart,nOver)+'';
Session(sSession)=nNum;
//Response.write(Session(sSession));
var arDg=[];
for(var i=0; i<nNum.length; i++){
arDg[i]=nNum.charAt(i);
}
var sMarker='\r\n';
var nWidth=8*arDg.length;
var nHeight=10;
Response.ContentType = "image/x-xbitmap"
var sImg='#define counter_width '+nWidth+sMarker+
'#define counter_height '+nHeight+sMarker+
'static unsigned char counter_bits[] = {'+sMarker
for(var i=0; i<10; i++){
for(var j=0, k=arDg.length; j{
sImg+=ar[arDg[j]][i]+',';
}
}
sImg=sImg.replace(/\,$/,'');
sImg+='};'+sMarker;
Response.write(sImg);
function fRandomBy(nUnder, nOver){
switch(arguments.length){
case 1: return parseInt(Math.random()*nUnder+1);
case 2: return parseInt(Math.random()*(nOver-nUnder+1) + nUnder);
default: return 0;
}
} // shawl.qiu code
} // end function checkcode(nStart, nOver, sSession)
%>

汪杰 2007-11-04 23:21 发表评论

关于留言版的自由回复

汪杰 — Sat, 03 Nov 2007 17:30:00 GMT

<%@Language="Javascript"%>

<%
var conn = Server.CreateObject("ADODB.Connection");
var connStr = "Provider=Microsoft.Jet.Oledb.4.0;Data Source="+Server.MapPath("asfman.mdb");
conn.Open(connStr);

var Rs = Server.CreateObject("ADODB.RecordSet");
Rs.Open("select * from messages",conn,1,1);
while(!Rs.EOF)
{
for(var i = 0;i {
  var temp = "";
  if(Rs.Fields(i).Name == "reply")
  {
   temp = Rs.Fields(i).Value;
   var arr = temp.match(/[^\f]+/g);
         var str = arr.length? "

":"";
for(var j = 0;j {
str = str +"

";
    var arr2 = arr[j].match(/[^\b]+/g);
    for(var k=0;k    {
     str = str + (arr2[k]+"
");
    }
    str = str +"

";
}
str = str?(str+"

"):"";
  }else
  {
   Response.Write(Rs.Fields(i).Value+"
");
  }

}
Response.Write(str);
Rs.MoveNext();
}
Rs.Close();
conn.Close();
conn = null;
Rs = null;
%>

<%@Language="Javascript"%>
<%
var conn = Server.CreateObject("ADODB.Connection");
var connStr = "Provider=Microsoft.Jet.Oledb.4.0;Data Source="+Server.MapPath("asfman.mdb");
conn.Open(connStr);
var sql="insert into messages(name,content,ipAddress,reply,_time) values('asfman2','test','122','\f汪杰\b这是一个测试\b127.0.0.1\b2007-11-4\fasfman\bjust a test\b127.0.0.1\b2007-11-4',now())";
conn.Execute(sql);
Response.Write("ok");
%>

汪杰 2007-11-04 01:30 发表评论

setRquestHeader使用实例1

汪杰 — Wed, 24 Oct 2007 07:41:00 GMT

<%@Language = "Javascript" %>
<%
//Response.Write(Request.ServerVariables("http_accept"));
var a=Request.QueryString('a').Item;
var b=Request.QueryString('b').Item;
if(!a){total="";}
else{
var total=a-0+(b-0);}
acc=Request.ServerVariables('HTTP_ACCEPT')+''
if (acc.indexOf('asfman')!=-1) {
Response.Write(total)
} else {
%>

<%
}
%>

汪杰 2007-10-24 15:41 发表评论

create xml file

汪杰 — Mon, 06 Aug 2007 15:05:00 GMT

<%@ Language="Javascript" %>
<%
var xmlDoc=new ActiveXObject("Microsoft.XMLDOM");
var root=xmlDoc.createElement("information");
xmlDoc.appendChild(root);
for(var i=1;i<=Request.Form.Count;i++)
{
if(Request.Form.Key(i)!="sub")
{
for(var j=1;j<=Request.Form(i).Count;j++)
{
   var field=xmlDoc.createElement("field");
   var attID=xmlDoc.createAttribute("ID");
   attID.text=Request.Form.Key(i);
   field.setAttributeNode(attID);
   var value=xmlDoc.createElement("value");
   value.text=Request.Form(i)(j);
   field.appendChild(value);
   root.appendChild(field);
}
}
}
var p=xmlDoc.createProcessingInstruction("xml","version='1.0' encoding='gb2312'");
xmlDoc.insertBefore(p,root);
xmlDoc.save(Server.Mappath("information.xml"));
Response.Write("saved information.xml successfully!");
%>

汪杰 2007-08-06 23:05 发表评论

OLEDB连接方法

汪杰 — Sun, 05 Aug 2007 10:12:00 GMT

ASP中连接数据库(ADODB对象)：

一、OLEDB连接方法

1.OLE DB Provider for AS/400
connstr = "Provider=IBMDA400;" Data source=myAS400;User Id=myUsername;Password=myPassword;"

2.OLE DB Provider for Active Directory Service
connstr = "Provider=ADSDSOObject;User Id=myUsername;Password=myPassword;"

3.OLE DB Provider for DB2
connstr = "Provider=DB2OLEDB;Network Transport Library=TCPIP;Network Address=MyServer;Package Collection=MyPackage;Host CCSID=1142Initial Catalog=MyDB;User ID=MyUsername;Password=MyPassword;"

4.OLE DB Provider for Index Server
connstr = "Provider=msidxs;Data source=MyCatalog;"

5.OLE DB Provider for Internet Publishing
connstr = "Provider=MSDAIPP.DSO;Data Source=url;User Id=myUsername;Password=myPassword;"

6.OLE DB Provider for Microsoft Jet(access-this way will be best)
connstr = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=dbpath;User Id=admin;Password=;"

7.OLE DB Provider for Microsoft Jet(Excel)
connstr = Provider=Microsoft.Jet.OLEDB.4.0;Data Source=dbpath;Extended Properties=""Excel 8.0;HDR=Yes;"";"

["HDR=Yes" means that there is a header row in the cell range (or named range), so the provider will not include the first row of the selection into the recordset. If "HDR=No", then the provider will include　the first row of the cell range (or named ranged) into the recordset]

9.OLE DB Provider for Microsoft Jet(textfile)
connstr = Provider=Microsoft.Jet.OLEDB.4.0;Data Source=dbpath;Extended Properties=""text;HDR=Yes;FMT=Delimited;"";"

10.OLE DB Provider for ODBC Databases(access)
connstr = "Provider=MSDASQL;Driver={Microsoft Access Driver (*.mdb)};Dbq=dbpath;Uid=myUsername;Pwd=myPassword;"

11.OLE DB Provider for ODBC Databases(SQL)
connstr = "Provider=MSDASQL;Driver={SQL Server};Server=myServerName;Database=myDatabaseName;Uid=myUsername;"Pwd=myPassword;"

12.OLE DB Provider for Oracle (from Microsoft)
connstr = "Provider=msdaora;Data Source=MyOracleDB;User Id=myUsername;Password=myPassword;"

13.OLE DB Provider for Simple Provider
connstr = "Provider=MSDAOSP;Data Source=MSXML2.DSOControl.2.6;"

14.OLE DB Provider for SQL Server
"Provider=sqloledb;Data Source=myServerName;Initial Catalog=myDatabaseName;User Id=myUsername;Password=myPassword;"

[if connection with ip address]
connstr = "Provider=sqloledb;Data Source=xxx.xxx.xxx.xxx,1433;Network Library=DBMSSOCN;Initial Catalog=myDatabaseName;User ID=myUsername;Password=myPassword;"

[1433　为SQL数据库默认接口]

汪杰 2007-08-05 18:12 发表评论

js send email class from wscript.cn

汪杰 — Sat, 16 Jun 2007 07:30:00 GMT

<%@Language="JScript" codepage="936"%>
<%
function aspMailClass(){
        var fromMail = "test@test.com";                //发件人邮箱
        var fromServ = "smtp.test.com";                //smtp服务器
        var fromProt = 25;                        //smtp服务器端口
        var fromName = "无忧脚本";                //发件人姓名
        var fromUser = "51js";                        //发件人邮箱用户名
        var fromPass = "51js";                        //发件人邮箱密码
        this.sendMail = function(toEmail, toTitle, toBody){
                try {
                        var byMail = new ActiveXObject("CDO.Configuration");
                        var fields = byMail.Fields;
                        var cfgUrl = "http://schemas.microsoft.com/cdo/configuration/";
                        fields(cfgUrl + "sendusing") = 2;                //这里是发送邮件的端口
                        fields(cfgUrl + "smtpserver") = fromServ;        //smtp服务器
                        fields(cfgUrl + "smtpserverport") = fromProt;        //smtp服务器端口
                        fields(cfgUrl + "smtpaccountname") = fromMail;        //发件人帐号名称
                        fields(cfgUrl + "sendemailaddress") = fromMail;        //发件人的信箱
                        fields(cfgUrl + "smtpauthenticate") = 1;        //是否认证
                        fields(cfgUrl + "sendusername") = fromUser;        //发件人邮箱用户名
                        fields(cfgUrl + "sendpassword") = fromPass;        //发件人邮箱密码
                        fields.Update();
                        var oMail = new ActiveXObject("CDO.Message");
                        with(oMail){
                                To = toEmail;
                                Subject = toTitle;
                                HTMLBody = toBody;
                                From = fromName + "<" + fromMail + ">";
                                Configuration = byMail;
                                Mimeformatted = true;
                                AutoGenerateTextBody = true;
                                Fields.Update();
                                HTMLBodyPart.Charset = "gb2312";
                                Send();
                        }
                        oMail = null;
                        fields = null;
                        byMail = null;
                        return this.result = "邮件成功发送至" + toEmail + "！";
                }
                catch(e) {
                        return this.result = "发送至" + toEmail + "的邮件发送失败！失败原因：" + e.description;
                }
        }
}

//实例
var toMail = new aspMailClass();
toMail.sendMail("xxx@xxx.com", "欢迎来到无忧脚本", "主题主题2");
Response.Write(toMail.result);
toMail = null;
%>

汪杰 2007-06-16 15:30 发表评论

关于xmlhttp.responseText

汪杰 — Tue, 12 Jun 2007 14:47:00 GMT

只要子读取文件设置有Response.Charset就可以正常读取，如果没有设置的话，默认是按utf-8读取，所有对于ansi文件我们最好设置Response.Charset，从来可以避免自己去解码responseBody

汪杰 2007-06-12 22:47 发表评论

关于sct编写、调用需要注意的

汪杰 — Thu, 07 Jun 2007 02:06:00 GMT

用Jscript写sct:
method指定的方法名必须与脚本的名字相同，符合js是区分大小写的。
用VBScript谢sct:
method指定的方法名不区分大小写。
note:
一旦指定了方法名，调用的时候就要用这个方法名，区分大小写
eg:

无论js还是vbs写，调用的时候都得o.test()，用o.Test等等将出错

汪杰 2007-06-07 10:06 发表评论

http协议简介

汪杰 — Wed, 30 May 2007 05:44:00 GMT

什么是HTTP协议

HTTP 协议定义服务器端和客户端之间文件传输的沟通方式。目前HTTP协议的版本是Http1.1。RFC 2616描述了HTTP协议的具体信息。

这个协议已经成为浏览器和Web站点之间的标准。

当我上网的时候底层是如何进行交互的？

当访问者点击一个超链接的时候，将会给浏览器提交一个URL地址。通过这个URL地址，浏览器便知道去链接那个网站并去取得具体的页面文件（也可能是一张图片，一个pdf文件）。

HTTP工作的基础就是，连接一个服务器并开始传输文件到浏览器。

HTTP传输的基本过程

在http传输的过程中，被称为客户端的请求者向服务器请求一个文件。

最基本的过程是:
1 客户端连接一个主机；
2 服务器接收连接,
3 客户端请求一个文件,
4 服务器发送一个应答.

实例

我们看几个典型的过程

首先，我们想访问本页面。在浏览器上敲入“http://www.maketop.net/resource/rs_041112_02.php”.浏览器将连接www.maketop.net然后发送：

>> GET /resource/rs_041112_02.php Http1.1
>> Host: www.maketop.net
>> Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg,
>> Accept-Language: en
>> Accept-Encoding: gzip, deflate
>> User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; rv:1.7.3) Gecko/20040913 Firefox/0.10
>> Connection: Keep-Alive
>>

解释：浏览器请求页面“/resource/rs_041112_02.php”。并使用HTTP1.1协议。并告诉服务器你的浏览器是Firefox0.10。操作系统是Windows XP。浏览器希望保持与www.maketop.net之间的连接，并请求获得多的文件，包括网页中的图片。翻译成语言上面是：

>> 用HTTP1.1协议获得 /resource/rs_041112_02.php
>> 访问的主机是: www.maketop.net
>> 接收的文件包括了: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg,
>> 使用的语言是: en
>> 接收的编码方式（浏览器能够解释的）是: gzip, deflate
>> 用户的浏览器信息:Windows XP的操作系统 Firefox/0.10的浏览器
>> 保持连接: 还要去图片
>>

www.maketop.net的服务器发出响应：

<< HTTP/1.1 200 OK
<< Date: Mon, 12 Mar 2004 19:12:16 GMT
<< Server: Apache/1.3.31 (Unix) mod_throttle/3.1.2
<< Last-Modified: Fri, 22 Sep 2004 14:16:18
<< ETag: "dd7b6e-d29-39cb69b2"
<< Accept-Ranges: bytes
<< Content-Length: 3369
<< Connection: close
<< Content-Type: text/html
<<
<< File content goes here

浏览器并从服务器的响应中获得服务器的信息：比如运行在Apache。
上面翻译成翻译成语言上面就是

<< HTTP1.1协议方式有效
<< 当前时间是: Mon, 12 Mar 2004 19:12:16 GMT
<< 服务器是: Apache/1.3.31 (Unix) mod_throttle/3.1.2
<< 最后一次修改: Fri, 22 Sep 2004 14:16:18
<< ETag: "dd7b6e-d29-39cb69b2"
<< Accept-Ranges: bytes
<< Content-Length: 3369
<< Connection: close
<< Content-Type: text/html
<<
<< File content goes here

上面例子就是最简单的交互过程描述，需要对HTTP协议中具体的命令了解，就需要阅读 RFC 2616
本页网址: http://sohotx.com/mzk/index.php/1007/ArticleContent/429.html

汪杰 2007-05-30 13:44 发表评论

JSP学习

汪杰 — Mon, 28 May 2007 03:05:00 GMT

如何成为一个成功的Jsp程序员？一个普通的错误是把JSP当作简化的Java。它不是，（事实上， JSP是简化的 servlets。）程序员通常试着没有学习要求的支持技巧而直接学习JSP。JSP 是一个衔接技术，并且成功地连接你需要理解的另外的技术。如果你已经知道Java，HTML和Javascript，这意味着JSP将确实是简单的。

　　需要成为一个成功的 JSP 程序员可以参考这个时间表。请注意下列：

　　*忽略你已经熟悉的步骤。
　　*训练的时间只是代表学习好足够的基础时间，这样才能转移到下一步。

　　１、建立并且理解你的Web Server。
　　因为Apache 是免费的并且在大多数平台上工作，为训练目的推荐 Apache。
　　安装时间：2 天。

　　２、保证你理解 HTML / XHTML 。
　　你将需要了解html基础, 特别是 HTML 布局中的table的使用。XHTML 不久将代替 HTML ，学习 XHTML 的基础是一个好主意。许多程序员通过 HTML IDE 学习 HTML ( 集成开发环境 ) 。因为大多数 HTML IDE产生混乱的HTMl语法，所以花时间学习手工写作html是很有必要的。因为你将会使用 JSP 和 HTML 混合编程，精通HTML语法是重要的。所以，你必须能流利地写 HTML 。
　　训练时间：2 ～ 4 个星期。

　　３、开始学习 Java 。
　　开始学习 Java 1.4 理解 Java 基础是很重要的。不用担心学习Swing或 Java 的图形方面，因为在JSP 中你不会使用这些特征。集中精力在 Java 工作的细节，学习 Java 的逻辑，也在 Java Bean上花时间。学习Applet是好的, 但是就象Swing， JSP 的大多数应用将不使用小程序。
　　训练时间：3 ～ 6 个星期。

　　4、学习 JavaScript
　　学习怎么将 JavaScript在HTML中验证输入的Form元素。也学习 JavaScript怎么能在一 HTML 页以内修改Form的元素。最后要求你能从一HTML 页内的事件中触发 JavaScript Function。
　　训练时间：一～ 2 个星期。

　　5、学习并且理解你的Web Server的更好的细节。
　　熟悉Web Server的特征，这是很重要的。
　　训练时间：2 天。

　　6、建立你的 JSP Server
　　我推荐以Tomcat开始。它可以很好地运行JSP程序。当你不能在生产使用Tomcat时，学习尽可能多的知识以便于更好的运行程序。另外, 许多 JSP 程序员使用Tomcat。因此当你遇到一个问题时，你将容易发现帮助。
　　安装时间：1～ 2 天。

　　7、开始学习 JSP 。
　　基本的 JSP 学习通过的步骤 1到步骤6可以完成, 然后使用 JSP 对象和脚本写 JSP 程序来联系。学习 JSP 的另外一个方面可以学习怎么创建一个分布式的应用程序。
　　训练时间：4 ～ 6 个星期。

　　8、学习更多的 JSP server。
　　没有关于更多的 JSP Server当然也可以运行jsp程序。然而, 许多 JSP server都由自己特殊的特征，可以让你更好的理解你的JSP 工程。
　　学习更多的Jsp server如何处理jsp程序是有必要的。同样也可以优化你的 JSP 应用程序，并且使之运行得更快而不出任何问题。
　　训练时间：2 ～ 7 天。

　　9、学习 JDBC 。
　　JSP 大多数应用将使用数据库，JDBC 被用于数据库连接。经常忽略的一个事实就是，每个 JDBC Driver 所支持的东西是相当不同的。了解并熟悉在jsp工程上被使用的 JDBC driver的细节是很重要的。（有时这部分的学习被包含在前面 Java 或JSP的学习中了。）
　　训练时间：1～ 2 个星期。

　　到现在，你已经成为了熟练的 JSP 程序员。仍然有很多需要学习，你可以考虑扩展你的知识比如 DHTML ， XML ，java证书， JSP Tag Libraries 或 Servlets , 看你想要造什么类型的网站而决定了。

　　这些训练是JSP 的核心。你不必都学习上面所有的, 取决于你在工程中分配到什么任务和你已经有什么知识。但是这是我成功地训练程序员的时间表。关键的单元是时间。平均的说, 5 个月时间确实能够训练一个人 ( 从开始到完成 ) 成为一个对jsp熟悉程序员。5 个月时间似乎很长，但要成为一个资深的WEB程序员所学的东西远远不止这一些。

　　也许你认为这样学习一种语言花费的时间太长了，因为学 ASP 会更快、时间会更短。但是学习 ASP 不需要学习java的。

汪杰 2007-05-28 11:05 发表评论

IT博客网-asfman-文章分类-asp(javascrpt)

编码的原理 BASE64

404 and execute,transfer

关于mdb里的乱码

向游览器输出excel

about stream read bytes

创建数据库表组件

http headers reference

General Header Fields

Request Header Fields

Response Header Fields

Entity Header Fields

Request Header Example

Response Header Example

See Also

http response headers

just CusorType=1 will be ok

jscript ado && adox 应用的几个技巧

服务端 jscript 生成随机数图片验证码 by shawl.qiu

关于留言版的自由回复

setRquestHeader使用实例1

create xml file

OLEDB连接方法

js send email class from wscript.cn

关于xmlhttp.responseText

关于sct编写、调用需要注意的

http协议简介

JSP学习

编码的原理　　BASE64