Active Server Page — ASP in Java Script

Content u Introduction u Object Models u Request Object u Response Object u Server

Introduction u Microsoft’s newest server-based technology for building dynamic interactive web pages u No

ASP Usage <%@language=JScript%> <html> <head> <title>Active Server Scripting</title> </head> <body> <h 3>Active Server Scripting

Complete ASP Program <%@Language=JScript %> <HTML><HEAD> …</HEAD><BODY> <% … ASP script which runs on

Server-side includes u <!-- #include file=“include. txt” --> u Include text files in pages

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Basic Statements u <% Response. Write(“string”) %> u Output u <% a string (

An ASP Example <%@language=JScript%> <% num=Request. Form(

Please input" src="https://present5.com/presentation/129e2051e253f6ddfa74d44d0fadc48e/image-10.jpg" alt="asp. Example 1. html

Source File in Web Client <html> <head><title>An ASP Example</title></head> <body> You are <b>Yen-Cheng Chen</b>!

Built-In ASP Objects u Request Object u To retrieve the values that the client

Built-In ASP Objects (cont. ) u Application u To share information among all users

Client Request Object Collection: Form Query. String Server. Variables Cookie Client. Certificate Response Object

Request Object u Provide all the information about the user’s request to applications u

Collections in Request Object u Five collections u Query. String: HTTP query string (GET)

Properties and Methods u Properties u Total. Bytes: Read-only. Specifies the total number of

Query. String Collection: Get u The names and values of form are put into

query. Test. asp? name=Mickey+Mouse&age=50 <%@language=JScript%> <html><head><title>Query String Test ASP</title></head><body> You are <font color=red><%=Request. Query.

<HTML><HEAD><TITLE></HEAD><BODY> <H 3>Passing Name=Value Pairs with a Query String</H 3> <A NAME=

Form Collection: Post u The name and values of the form are encoded into

text" src="https://present5.com/presentation/129e2051e253f6ddfa74d44d0fadc48e/image-23.jpg" alt="form. Test. html the form text" />

radio" src="https://present5.com/presentation/129e2051e253f6ddfa74d44d0fadc48e/image-24.jpg" alt="form. Test. asp <%@language=JScript%> Form Test ASP <%=Request. Form("text 1")%>

text 1

radio" />

Server. Variables Collections u Provide HTTP header that is sent by a client browser

CONTENT_LENGTH = <% = Request. Server. Variables("CONTENT_LENGTH")" src="https://present5.com/presentation/129e2051e253f6ddfa74d44d0fadc48e/image-27.jpg" alt="AUTH_TYPE = <%= Request. Server. Variables("AUTH_TYPE") %> CONTENT_LENGTH = <% = Request. Server. Variables("CONTENT_LENGTH")" />

ALL_HTTP ALL_RAW APPL_MD_PATH All HTTP headers sent by the client. All headers in the

HTTPS_KEYSIZE HTTPS_SECRETKEYSIZE HTTPS_SERVER_ISSUER HTTPS_SERVER_SUBJECT INSTANCE_ID INSTANCE_META_PATH LOCAL_ADDR LOGON_USER PATH_INFO PATH_TRANSLATED QUERY_STRING REMOTE_ADDR REMOTE_HOST REMOTE_USER

Cookie Collection u The cookie is a text file stored on the client u

Response Object u To send output to the client u Collection: Cookie u Method

Response Object: Classification u Insert information u Write(), Binary. Write() u Send cookie: Cookie

Inserting Information u Response. Write(“string”) u Insert a string into the HTML output u

Sending Cookies u u u Response. Cookies(“Cookie. Name”)=“data” Response. Cookies(“Cookie. Name”). Expires=“ 11/26/1197 17:

Redirecting the Browser u Refer users to alternative web pages u Redirection header u

Buffering the Page u An extra degree of control over u When a client

Server Object u The roof of the object model u Provides access to methods

Script. Timeout Property u Define the delay before all scripts are terminated u Default

HTMLEncode Method u Replace the angle-brackets with an escape sequence u Server Client <%

URLEncode Method u Convert a string into URL-encoded form u Space + u Special

Map. Path Method u Provide file location information for use in scripts u Logical

Create. Object Method u Invoke objects on the server u Extend the use of

<%@language=JScript%> <% textfile = Server. Map. Path(

Application Object u To share information among all users of a given application. u

Application Object (cont. ) u Methods u Lock : Prevents other clients from modifying

Application Object u Usage Application. Lock() Application(“name”)=“value” Application. Unlock() u Event handles: u global.

Example - Application Object <%@language=JScript%> <% Application. Lock() Application(

Application Object u Application Life u Start u The application starts the first time

Please enter your name: Please enter your name:

app. Test. asp <%@language=JScript%> <% Application. Lock() Application(

Session Object u Share data between different pages, but not between different clients u

Session Object u To store information needed for a particular usersession. u Variables stored

Session Object (cont. ) u Properties u Code. Page: Codepage used for symbol mapping.

Session. ID Property u When store information in the Session object, the client is

$Event Handler u global. asa <%@language=JScript%> … function Session_On. Start() { … ’first request$

Summary u Object u Use Models Request Object to receive client's request. u Use

Installable Components for ASP u u u Ad Rotator (Ad. Rotator): Automatically rotates advertisements

Installable Components for ASP (cont. ) u u u Tools (Tools): Enables you to

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Active Server Page - ASP in Java. Script 王金龍、陳彥錚銘傳大學資管系

Content u Introduction u Object Models u Request Object u Response Object u Server Object u Application and Session Objects u Installable Components for ASP

Introduction u Microsoft’s newest server-based technology for building dynamic interactive web pages u No compiler u Text editor u Browser independent u Object-oriented u Compatible to any Active. X scripting u Transparent to users

ASP Usage <%@language=JScript%> Active Server Scripting Active Server Scripting <% Response. Write("This is so cool!!!”)%>

Complete ASP Program <%@Language=JScript %> … <% … ASP script which runs on the server … %>

…

<% … %>

Server-side includes u  u Include text files in pages Server-side includes u u Include text files in pages u Virtual file addresses u u Physical u u

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… Form Use [an error occurred while processing the directive] <% Response. Write(Request. Form("text 1")); %>

Basic Statements u <% Response. Write(“string”) %> u Output u <% a string ( more readable ) = “string” %> or <%=Var. Expression%> u Insert a string u <%=Request. Form(“user. Name”)%> u <% Response. Redirect(“URL”) %> u Redirect to the URL u <% // Some Comments %>

An ASP Example <%@language=JScript%> <% num=Request. Form("num. Of. Hr"); msg="Welcome to My ASP Example!"; %> An ASP Example You are <%=Request. Form("user. Name")%>! <%=msg%>

<% for ( i=1; i<=num; i++) { %> Iteration <%=i%> <% Response. Write("

"); } %>

asp. Example 1. html <html> <body> <form method= Please input" src="https://present5.com/presentation/129e2051e253f6ddfa74d44d0fadc48e/image-10.jpg" alt="asp. Example 1. html Please input" /> asp. Example 1. html Please input a number: Your Name:

Source File in Web Client <html> <head><title>An ASP Example</title></head> <body> You are <b>Yen-Cheng Chen</b>! Source File in Web Client An ASP Example You are Yen-Cheng Chen! Welcome to My ASP Example!

Iteration

1 2 3 4 5

Built-In ASP Objects u Request Object u To retrieve the values that the client browser passed to the server during an HTTP request. u Response u To Object send output to the client. u Server u Provide utility functions on the server.

Built-In ASP Objects (cont. ) u Application u To share information among all users of a given application. (Like global variables) u Session u To store information needed for a particular user-session. (Like local variables) u Object. Context u To commit or abort a transaction, managed by Microsoft Transaction Server (MTS).

Client Request Object Collection: Form Query. String Server. Variables Cookie Client. Certificate Response Object Collection: Cookie (Properties) (methods) Server Object (method) Application Object Session Object (properties) (methods)

Request Object u Provide all the information about the user’s request to applications u Collection u. A data store that can store values by linking each one to a unique key

Collections in Request Object u Five collections u Query. String: HTTP query string (GET) Query. String u Form: Form elements (POST) Form u Server. Variables: HTTP and environment Server. Variables variables u Cookie: Cookie sent from the browser Cookie u Client. Certificate: Certificate values (SSL: https) Client. Certificate u Usage variable = Request. collection. Name(“key”)

Properties and Methods u Properties u Total. Bytes: Read-only. Specifies the total number of bytes the client is sending in the body of the request. u Methods u Binary. Read(count): Retrieves data sent to the server from the client as part of a POST request.

Query. String Collection: Get u The names and values of form are put into a query string u The amount of data can be sent is limited to around 1000 characters u Usage u variable = Request. Query. String(“name”)

query. Test. asp? name=Mickey+Mouse&age=50 <%@language=JScript%> Query String Test ASP You are <%=Request. Query. String("name")%> You are <%=Request. Query. String("age")%> years old.

<HTML><HEAD><TITLE></HEAD><BODY> <H 3>Passing Name=Value Pairs with a Query String</H 3> <A NAME= </HEAD><BODY> <H 3>Passing Name=Value Pairs with a Query String</H 3> <A NAME="product" HREF="list 7_5. asp? name=dina&pub=sams">Sams Publishing </A></BODY></HTML> <html> <head> <title> Getting Name=Value Pairs with a Query String

name = <%= Request. Query. String("name") %>

pub = <% = Request. Query. String("pub") %>

Form Collection: Post u The name and values of the form are encoded into the request header u Usage u variable = Request. Form(“name”)

form. Test. html <html><head> <title>the form</title></head><body> <form name= text" src="https://present5.com/presentation/129e2051e253f6ddfa74d44d0fadc48e/image-23.jpg" alt="form. Test. html the form

form. Test. asp <%@language=JScript%> <html><head><title>Form Test ASP</title></head><body> <table border=2> <tr><td>text 1</td><%=Request. Form(

radio" src="https://present5.com/presentation/129e2051e253f6ddfa74d44d0fadc48e/image-24.jpg" alt="form. Test. asp <%@language=JScript%> Form Test ASP <%=Request. Form("text 1")%>

text 1

radio" /> form. Test. asp <%@language=JScript%> Form Test ASP <%=Request. Form("text 1")%><%=Request. Form("radio 1")%><%=Request. Form("select 1")%> <%num=Request. Form("select 2"). Count; for (i=1; i<=num; i++) { %> <% } %>

text 1
radio 1
select 1
select 2	<%=Request. Form("select 2")(i)%>
hidden 1	<%=Request. Form("hidden 1")%>
text. Area 1	<%=Request. Form("text. Area 1")%>

Server. Variables Collections u Provide HTTP header that is sent by a client browser u To Retrieves the values of predetermined environment variables. u Usage u variable = Request. Server. Variables(“Header. Type”)

CONTENT_LENGTH = <% = Request. Server. Variables("CONTENT_LENGTH")" src="https://present5.com/presentation/129e2051e253f6ddfa74d44d0fadc48e/image-27.jpg" alt="AUTH_TYPE = <%= Request. Server. Variables("AUTH_TYPE") %> CONTENT_LENGTH = <% = Request. Server. Variables("CONTENT_LENGTH")" /> AUTH_TYPE = <%= Request. Server. Variables("AUTH_TYPE") %> CONTENT_LENGTH = <% = Request. Server. Variables("CONTENT_LENGTH") %> CONTENT_TYPE = <% = Request. Server. Variables("CONTENT_TYPE") %> GATEWAY_INTERFACE = <% = Request. Server. Variables(“GATEWAY_INTERFACE”) %> LOGON_USER = <% = Request. Server. Variables("LOGON_USER") %> PATH_INFO = <% = Request. Server. Variables("PATH_INFO") %> PATH_TRANSLATED = <% = Request. Server. Variables("PATH_TRANSLATED") %> QUERY_STRING = <% = Request. Server. Variables("QUERY_STRING") %> REMOTE_ADDR = <% = Request. Server. Variables("REMOTE_ADDR") %> REMOTE_HOST = <% = Request. Server. Variables("REMOTE_HOST") %> REMOTE_METHOD = <% = Request. Server. Variables("REMOTE_METHOD") %> SCRIPT_MAP = <% = Request. Server. Variables("SCRIPT_MAP") %> SCRIPT_NAME = <% = Request. Server. Variables("SCRIPT_NAME") %> SERVER_NAME = <% = Request. Server. Variables("SERVER_NAME") %> SERVER_PORT = <% = Request. Server. Variables("SERVER_PORT") %> SERVER_PORT_SECURE = <%=Request. Server. Variables("SERVER_PORT_SECURE") %> SERVER_PROTOCOL = <% = Request. Server. Variables("SERVER_PROTOCOL") %> SERVER_SOFTWARE = <% = Request. Server. Variables("SERVER_SOFTWARE") %> URL = <% = Request. Server. Variables("URL") %>

ALL_HTTP ALL_RAW APPL_MD_PATH All HTTP headers sent by the client. All headers in the raw-form. The metabase path for the (WAM) Application for the ISAPI DLL. APPL_PHYSICAL_PATH Retrieves the physical path corresponding to the metabase path. AUTH_PASSWORD The value entered in the client's authentication dialog. AUTH_TYPE The authentication method that the server uses to validate users. AUTH_USER Raw authenticated user name. CERT_COOKIE Unique ID for client certificate, Returned as a string. CERT_FLAGS bit 0 is set to 1 if the client certificate is present. bit 1 is set to 1 if the client Certifying Authority is invalid. CERT_ISSUER Issuer field of the client certificate. CERT_KEYSIZE Number of bits in Secure Sockets Layer connection key size. CERT_SECRETKEYSIZE Number of bits in server certificate private key. CERT_SERIALNUMBER Serial number field of the client certificate. CERT_SERVER_ISSUER Issuer field of the server certificate. CERT_SERVER_SUBJECT Subject field of the server certificate. CERT_SUBJECT Subject field of the client certificate. CONTENT_LENGTH The length of the content as given by the client. CONTENT_TYPE The data type of the content. GATEWAY_INTERFACE The revision of the CGI specification used by the server. HTTP_ The value stored in the header Header. Name. HTTPS ON : if the request came in through secure channel (SSL). OFF : Otherwise.

HTTPS_KEYSIZE HTTPS_SECRETKEYSIZE HTTPS_SERVER_ISSUER HTTPS_SERVER_SUBJECT INSTANCE_ID INSTANCE_META_PATH LOCAL_ADDR LOGON_USER PATH_INFO PATH_TRANSLATED QUERY_STRING REMOTE_ADDR REMOTE_HOST REMOTE_USER REQUEST_METHOD SCRIPT_NAME SERVER_PORT_SECURE SERVER_PROTOCOL SERVER_SOFTWARE URL Number of bits in Secure Sockets Layer connection key size. Number of bits in server certificate private key. Issuer field of the server certificate. Subject field of the server certificate. The ID for the IIS instance in textual format. Metabase path for the IIS instance that responds to the request. Returns the Server Address on which the request came in. The Windows NTR account that the user is logged into. Extra path information as given by the client. A translated version of PATH_INFO (virtual-to-physical) Query information after ? in the HTTP request. The IP address of the remote host making the request. The name of the host making the request. Unmapped user-name string sent in by the User. The method used to make the request. A virtual path to the script being executed. The server's host name, DNS alias, or IP address. The port number to which the request was sent. 1 : If the request is on the secure port. 0 : Otherwise. The name and revision of the request information protocol. The name and version of the server software. Gives the base portion of the URL.

Cookie Collection u The cookie is a text file stored on the client u Use Request object to access the cookie u Read only u To change cookie: Use Response object u Usage u variable = Request. Cookies(“cookie. Variable”)

Response Object u To send output to the client u Collection: Cookie u Method u Add. Header(name, value) u Properties u Append. To. Log(string) u Buffer u Cache. Control u Charset u Content. Type u Expires. Absolute u is. Client. Connected u Pics u Status u Binary. Write(data) u Clear() u End() u Flush() u Redirect(url) u Write(variant)

Response Object: Classification u Insert information u Write(), Binary. Write() u Send cookie: Cookie u Redirecting: Redirect() u Buffering the page u Buffer, u Setting Flush(), Clear(), End() the properties of a page u Expires, Expires. Absolute, Cache. Control, Content. Type, Add. Header, Status

Inserting Information u Response. Write(“string”) u Insert a string into the HTML output u Convert the text to an appropriate character set u <% = “string” %> u Response. Binary. Write(data) u Prevent the conversion

Sending Cookies u u u Response. Cookies(“Cookie. Name”)=“data” Response. Cookies(“Cookie. Name”). Expires=“ 11/26/1197 17: 35: 00” Response. Cookies(“Cookie. Name”). Domain=“/netnt. mcu. edu. tw/” Response. Cookies(“Cookie. Name”). Path=“/u 99” Response. Cookies(“Cookie. Name”). Secure=True Multiple Value Cookie <% Response. Cookies(“Cookie. Name”)(“item 1”)=“data 1” Response. Cookies(“Cookie. Name”)(“item 2”)=“data 2” %>

Redirecting the Browser u Refer users to alternative web pages u Redirection header u Tell the browser to go and get the information elsewhere u Usage u Response. Redirect(“URL”)

Buffering the Page u An extra degree of control over u When a client receives information u What they receive u Usage u Response. Buffer = True ’Default is false u Response. Flush() ’Send the current content u Response. Clear() ’Clear the current buffer u Response. End() ’Stop processing and send u When reach the end, the contents are sent

Server Object u The roof of the object model u Provides access to methods and properties on the server. u Most of these methods and properties serve as utility functions. u Property u Script. Timeout: Amount of time a script can run u Method u Create. Object(prog. ID)Create an instance of an object u HTMLEncode(string) HTML Encoding u URLEncode(string) URL Encoding u Map. Path(path) Convert a virtual path to a physical path

Script. Timeout Property u Define the delay before all scripts are terminated u Default = 90 seconds u Usage u Server. Script. Timout = nn;

HTMLEncode Method u Replace the angle-brackets with an escape sequence u Server Client <% = Server. HTMLEncode(“

”) %> <% = Server. HTMLEncode(“<%=Server. Script. Timeout %>”) %>

URLEncode Method u Convert a string into URL-encoded form u Space + u Special chars %nn ”> 33 % 33%

Map. Path Method u Provide file location information for use in scripts u Logical path Physical path u Usage u Phy. Path = Server. Map. Path(“/clipper”) u e: clipper u /path: virtual directory u path: relative path

Create. Object Method u Invoke objects on the server u Extend the use of server components u Usage u Set obj = Server. Create. Object(“Prog. Id”) u Use the methods and access the properties of the object u Is. Object( u Check obj ) if the object is created successfully

<%@language=JScript%> <% textfile = Server. Map. Path("/app 5")+"\test 1. html" fs. Object = Server. Create. Object("Scripting. File. System. Object") out. Stream= fs. Object. Create. Text. File(textfile, true, false) my. String = "File" out. Stream. Write. Line(mystring) now=new Date() my. String = "The time is " + now. to. Locale. String() out. Stream. Write. Line(mystring) out. Stream. Write. Line("") out. Stream. close() Response. Write("My New Text File ")%>

Application Object u To share information among all users of a given application. u An ASP-based application is defined as all the. asp files in a virtual directory and its subdirectories. u Collections u Contents : Contains all of the items that have been added to the Application. u Static. Objects : Contains all of the objects added to the session with the