Ajax UNIX MAGAZINE if0505.pdf. (86) Ajax. Ajax. Ajax (Asynchronous JavaScript + XML) Jesse James Garrett Web 1. Web.

Size: px

Start display at page:

Download "Ajax UNIX MAGAZINE if0505.pdf. (86) Ajax. Ajax. Ajax (Asynchronous JavaScript + XML) Jesse James Garrett Web 1. Web."

Gerald Horton
5 years ago
Views:

1 (86) Ajax Flash ` CGI Web Web Flash Java Flash Java JavaScript Google Google Suggest GMail Google Maps JavaScript Yahoo! Google Maps JavaScript `Ajax Ajax Web Ajax Ajax (Asynchronous JavaScript + XML) Jesse James Garrett Web 1 JavaScript XML XHTML CSS (Cascading Style Sheet) DOM (Document Object Model) XML XSLT / XMLHttpRequest JavaScript CGI Web HTTP Ajax 1 Ajax A New Approach to Web Applications adaptivepath.com/publications/essays/archives/ php ajax.html UNIX MAGAZINE

2 JavaScript Ajax JavaScript Web ` Ajax GUI ` Ajax JavaScript JavaScript Internet Explorer Firefox Safari JavaScript GMail Google Maps Ajax Ajax Ajax JavaScript XML- HttpRequest [1, 2] 1. XMLHttpRequest JavaScript 2. CGI XML 3. XMLHttpRequest XMLHttpRequest ActiveX Microsoft Mozilla Internet Explorer Mozilla/Firefox Internet Explorer XML- HttpRequest var req = new ActiveXObject ("Microsoft.XMLHTTP"); Mozilla Firefox Safari var req = new XMLHttpRequest(); XMLHttpRequest open() 3 true var url = req.onreadystatechange = callback; req.open("get", url, true); req.s(null); XMLHttpObject ready- State `4 XML readystate `2 `3 function callback(){ if(req.readystate==4 req.status == 200)){ ret = xmlhttp.responsexml; // ret = xmlhttp.responsetext; Ajax XML DOM CSS XML XMLHttpRequest? 2 UNIX MAGAZINE

html) <html> <head> </head><h1>ajax </h1> <body> <script language="javascript" src="dragimage.

3 1 2 Ajax XMLHttpRequest GUI & Web CGI XMLHttpRequest & 1 2 Web 1 HTML JavaScript dragimage.js 2 2 mouse down() mouse move() mouse up() `absolute 2 CGI Mozilla/Firefox 1 (dragimage.html) <html> <head> </head><h1>ajax </h1> <body> <script language="javascript" src="dragimage.js"></script> </body> </html> setpos.cgi 4 DOM CSS Ajax XMLHttpRequest Ajax 3 Ajax [4] LensBar 2 Java- Script Ajax getpos.cgi setpos.cgi( 4)? UNIX MAGAZINE

4 bobby `bobby `bobby 4 JavaScript `bobby 5 6 `bobby Ajax agrep [3] 5 4 gene95 ( tsuchiya/sdic/data /gene.html) 5 agrep WebGlimpse ( 7 `arukimede `arukimede `Archimedes 7 4 UNIX MAGAZINE

com/openpobox/ 2 Mozilla Firefox JavaScript Google Maps Ajax 7 Ajax Flash Java HTML

5 8 Ajax POBox 9 POBox Ajax POBox 8 9 POBox 6 Ajax textarea textarea Ajax Ajax JavaScript / JavaScript Mozilla Firefox JavaScript Google Maps Ajax 7 Ajax Flash Java HTML HTML HTML Ajax JavaScript HTML Web URL URL Flash Java Ajax Web 7 PHP Ajax SAJAX ( UNIX MAGAZINE

6 Flash Ajax Garrett Ajax Web [] [1] Drew McLellan, Very Dynamic Web Interface, February 9,2005 ( /09/xml-http-request.html) [2] XULPlanet.com, XMLHttpRequest ( com/references/objref/xmlhttprequest.html) [3]Sun Wu and Udi Manber, agrep A Fast Approximate Pattern-Matching Tool, In Proceedings of USENIX Technical Conference, pp , January 1992 [4] George Borden 37 pp JavaScript (dragimage.js) var selected_image = "none" var offsetx, offsety; for(var i=0;i<20;i++){ document.write( <img id="image + i + " style="visibility:hidden;" onmousedown="set_image( + i + )"> ) document.onmousemove = mouse_move; document.onmouseup = mouse_up; document.onmousedown = mouse_down; xmlhttp = new XMLHttpRequest(); xmlhttp.overridemimetype("text/xml"); xmlhttp.open("get", "getpos.cgi", true); xmlhttp.onreadystatechange=function() { if (xmlhttp.readystate==4) { var xmldoc = xmlhttp.responsexml; images = xmldoc.getelementsbytagname( image ) for(var i=0;i<images.length;i++){ image = images.item(i) file = image.getelementsbytagname( file ).item(0).childnodes.item(0).nodevalue; x = image.getelementsbytagname( x ).item(0).childnodes.item(0).nodevalue; y = image.getelementsbytagname( y ).item(0).childnodes.item(0).nodevalue; img = document.getelementbyid("image" + i) img.style.left = x; img.style.top = y; img.style.position = absolute ; img.style.visibility= ; img.src = file; xmlhttp.s(null) function set_image(image){ selected_image = image function mouse_down(e){ img = document.getelementbyid("image" + selected_image) 6 UNIX MAGAZINE

7 offsetx = e.pagex - img.x; offsety = e.pagey - img.y; function mouse_up(e){ img = document.getelementbyid("image" + selected_image) xmlhttp.open("get", "setpos.cgi?imageno=" + selected_image + "&x=" + img.x + "&y=" + img.y,true); xmlhttp.onreadystatechange=function() { if (xmlhttp.readystate==4) { result = xmlhttp.responsetext xmlhttp.s(null) selected_image = none function mouse_move(e){ if(selected_image!= "none"){ img = document.getelementbyid("image" + selected_image); img.style.left = e.pagex - offsetx; img.style.top = e.pagey - offsety; 3 CGI (getpos.cgi) #!/usr/bin/env ruby # XML require cgi require pstore images = [] db = PStore.new("pstore") db.transaction do images = db[ images ] if images.nil? then images = db[ images ] = [] Dir.open(".").each { file if file =~ /\.(jpg gif png)$/ then images << [file, 0, 0] 4 CGI (setpos.cgi) #!/usr/bin/env ruby # require cgi require pstore cgi = CGI.new( html3 ) x = cgi.params[ x ][0].to_i y = cgi.params[ y ][0].to_i imageno = cgi.params[ imageno ][0].to_i db = PStore.new("pstore") db.transaction do images = db[ images ] images[imageno][1] = x images[imageno][2] = y cgi.out { "" print "Content-Type: text/xml\n\n" print "<data>\n" images.each { image print <<EOF <image> <file>#{image[0]</file> <x>#{image[1]</x> <y>#{image[2]</y> </image> EOF print "</data>\n" UNIX MAGAZINE

AJAX and PHP AJAX. Christian Wenz,

AJAX and PHP AJAX. Christian Wenz, AJAX and PHP Christian Wenz, AJAX A Dutch soccer team A cleaner Two characters from Iliad A city in Canada A mountain in Colorado... Asynchronous JavaScript + XML 1 1 What is AJAX?