Html parser lazarus to xml found at htmlparser.sourceforge.net, lxml.de, w3schools.com and etc. Websites which provide info about html parser lazarus to xml. Look at 15 results out of 31 results, Updated: 17 July 2013..
All Comp/Apps Articles News Resume Tips. Lazarus Parser. Simple visual HTML parser, that breaks the HTML text to elements, parses tag parameters and visually organizes this information as HTML tags nesting tree..
Парсер html страницы на Паскале.
Web 2. 0 programming with Object Pascal (Part 1). I'm sure you experience the same feeling as me, whena "web developer" looks at your computer screensaying "wow! Delphi, I used to use itbefore programming web applications". When I hear that,I want to start telling them that Delphi (Object Pascal)can help you get better results than any other Web programminglanguage. I hope this series of articles let you know what canbe done in the web scene with Delphi and Free.
Гаджет будет получать информацию с сайта в виде xml, парсить и, собственно, отображать. Файл main. html – обычный html файл, приводить его полностью не буду. архив zip с расширением rar? и самописная софтина на Delphi. осталось лишь его поставить на хостинг 24/7 и. A diagram component based on a model/view system. FPC/Lazarus. The simple html parser at the lowest level, parses an XML/HTML like file and calls callback functions for every tag and text it has read.. . Урок программирования на Delphi. Парсинг информации с сайта. Для написания кода программы нам необходимо просмотреть html код страниц для USD и для EUR (мы будем парсить 2. Тип файла: rar . Как правило не существует универсальных парсеров для работы с HTML кодом, поэтому такие парсеры пишутся индивидуально для. . This processing of X/HTML data is the main focus of the Internet Tools and it provides an X/HTML parser, a tree representator, an XPath/XQuery . 8) RAR. 9) CAB Extract. Программа для сравнения файлов и директорий, 1) Beyond Compare. 2) Araxis Merge. Перенос HTML -файлов на Palm, iSilo, 1) iSilo. 2) Plucker. 2) Lazarus + FPC. XML C parser, 1) libxml, 1) Libxml2.
Pascal,and, if you are a PHP- Python- Ruby- ASP- [place your language here] programmer,just take a look at what can be done with modern Object Pascal languages. Part 1 - CGI + Ext. Js. Before continuing, please read what is CGI, and also take a look at Ext. Js. From now on, I'll create a CGI program capable of creating. JSON responses to an Ext. Js frontend. This example, will be compiled with Free.
Pascal 2. 5. 1. The CGIframework I'll use will be fcl- web, but you can choose. Pow. Tils and Ez. CGI as well. If youchoose Delphi to create the CGI program, you can use Web.
Broker,an excelent web development framework. All the examples of this series will be hosted on an Apache 2server, but of course, you canuse any CGI capable server like IIS, Light. Httpd (impressive!) and others. To test this example, I'll use Ubuntu 9. Free. Pascal 2. 5. Ext. Js 3. 1. 1. The client.
As a starting point for this example, I'll createa simple Ext. Js Grid. Panel placed on a static HTML page. Thedata shown on the grid, will be loaded from a JSon file,so no interaction with our CGI app here.
Now lets create a simple HTML page containing an. Ext. Js grid, copy and paste the code below and name itgrid. Content- Type" content="text/html; charset=utf- 8"> < title> Grid Example 1< /title> < link rel="stylesheet" type="text/css" href="/extjs/resources/css/ext- all. Grid Example 1< /h. Looking at the HTML code above, you'll note in many places there arereferences to "/extjs", that means I have uncompressed the Ext. Jsfiles into /var/www directory. My Apache. 2's document root directoryis /var/www, and my Ext.
Js files are under /var/www/extjs, alsoin the line just below the tag, there is a reference to"grid. This is the content of grid.
Ext. on. Ready(function(){var data. Store = new Ext. data. Json. Store({url: '/samples/customerslist.
GET',fields: [{name: 'firstname', type: 'string'},{name: 'lastname', type: 'string'},{name: 'age', type: 'int'},{name: 'phone', type: 'string'}]}); var my. Grid. 1 = new Ext. Grid. Panel({id: 'customerslist',store: data. Store,columns: [{id: "firstname", header: "First Name", width: 1. Index: "firstname", sortable: true},{header: "Last Name", width: 1. Index: "lastname", sortable: true},{header: "Age", width: 1. Index: "age", sortable: true},{header: "Phone", width: 1.
Index: "phone", sortable: true}],auto. Load: false,stripe. Rows: true,auto. Height: true,width: 4.
Store. load(); my. Grid. 1. render('grid. This file creates an instance of Ext. Json. Store, the objectin charge of loading data from an external JSon source, in thiscase the file "/samples/customerslist.
Also, aninstance of Ext. Grid. Panel called my. Grid. 1 is created, thatis the Grid who'll contain the data loaded from the Json. Store,the last line of this file, tells where should render the grid,in this case on a Div with an ID named "grid. Please, play with this example by adding more data to the Json file,and change the properties of the grid before continuing.
The result: Dynamic JSon data. The next step, is to create a CGI application in charge ofresponding requests from the JSon. Store. This is a simpletask for our CGI program, just create a string containingthe same data as "customerslist. The first FPC CGI application: program cgiproject. H+}uses. Classes,Sys.
Utils,http. Defs,custcgi; Type. TCGIApp = Class(TCustom. CGIApplication)Public. Procedure Handle.
Request(ARequest : Trequest; AResponse : TResponse); override; end; Procedure TCGIApp. Handle. Request(ARequest : Trequest; AResponse : TResponse); begin. AResponse. Content : = 'Hello!'; end; begin. With TCGIApp. Create(Nil) dotry.
Initialize; Run; finally. Free; end; end. Save it as "customerslist. Then, copy it to /var/www/cgi- bin and open a web browser, then point it to"http: //localhost/cgi- bin/customerslist". It should show "Hello!". That's it. Now, to let this program respond with the needed JSon, just replacethe line that AResponse. Content : = 'Hello!'; with this: AResponse.
Content : ='{' +' "rows": [ ' +' {"firstname": "Leonardo", "lastname": "Ramé", "age": 3. John", "lastname": "Williams", "age": 1.
Cecilia", "lastname": "Strada", "age": 2. Gary", "lastname": "Thomson", "age": 4. Compile, copy to /var/www/cgi- bin directoy and test. To call it from the Json. Store, go back to the grid. Json. Store by "/var/www/cgi- bin/customerslist".
Note: if you are working on Windows, the file "customerslist" will be createdas "customerslist. If you don't like to create JSON responses as simple strings,you can use the framework fcl- json, to create them usingan object- oriented method. To adapt the example for usin fcl- json, you must add theunit fpjson to the uses clause, and replacethe TCGIApp. Handle. Request by this: procedure TCGIApp.
Handle. Request(ARequest : Trequest; AResponse : TResponse); varl. Person. 1: TJSONObject; l. Person. 2: TJSONObject; l. Person. 3: TJSONObject; l. Person. 4: TJSONObject; l. Json: TJSONObject; l.
Json. Array: TJSONArray; beginl. Person. 1 : = TJSONObject. Create; l. Person. TJSONObject. Create; l. Person. 3 : = TJSONObject. Create; l. Person. TJSONObject. Create; l.
Json. Array : = TJSONArray. Create; l. Json : = TJSONObject. Create; try(* populate l. Person. 1 *)l. Person. Add('firstname', TJson.
String. Create('Leonardo')); l. Person. 1. Add('lastname', TJson. String. Create('Ramé')); l. Person. 1. Add('age', TJSONInteger. Number. Create(3. Person. 1. Add('phone', TJson. String. Create('1.
Person. 2 *)l. Person. Add('firstname', TJson. String. Create('John')); l. Person. 2. Add('lastname', TJson. String. Create('Williams')); l. Person. 2. Add('age', TJSONInteger.
Number. Create(1. Person. 2. Add('phone', TJson. String. Create('1. Person. 3 *)l. Person. Add('firstname', TJson. String. Create('Cecilia')); l.
Person. 3. Add('lastname', TJson. String. Create('Strada')); l. Person. 3. Add('age', TJSONInteger.
Number. Create(2. Person. 3. Add('phone', TJson. String. Create('3. Person. 4 *)l. Person.
Add('firstname', TJson. String. Create('Gary')); l.
Person. 4. Add('lastname', TJson. String. Create('Thomson')); l. Person. 4. Add('age', TJSONInteger. Number. Create(4.
Person. 4. Add('phone', TJson. String. Create('3. Fill the array *)l. Json. Array. Add(l. Person. 1); l. Json.
Array. Add(l. Person. Json. Array. Add(l.
Person. 3); l. Json. Array. Add(l. Person.
Add the array to rows property *)l. Json. Add('rows', l. Json. Array); AResponse. Content : = l. Json. As. JSON; finallyl. Json. Free; end; end; This looks like too much to type when comparing to the other method,but it's more readable, and easier to deal with complex JSon data.
Showing data from a database. Now, I'll replace the static JSon data with a dynamic one,resulting from a database query. In this example, I'll connect to a Firebird 2. I'm creating the example. To connectto the database, I'll use fcl- db framework and its TIBConnection class. This is the final project of this part, a dynamic- drivenweb page containing an Ext. Js Grid populated with datacoming from a databse.
H+}uses. Classes,Sys. Utils,http. Defs,custcgi, // needed for creating CGI applicationsfpjson, // needed for dealing with JSon data. Db, Sql. Db, ibconnection; // needed for connecting to Firebird/Interbase; Type. TCGIApp = Class(TCustom. CGIApplication)Private.
FConn: TSql. Connection; FQuery: TSql. Query; FTransaction: TSql. Transaction; procedure Connect.
To. Data. Base; Public. Procedure Handle.
Request(ARequest : Trequest; AResponse : TResponse); override; end; procedure TCGIApp. Connect. To. Data.
Base; begin. FConn : = TIBConnection. Create(nil); FQuery : = TSql. Query. Create(nil); FTransaction : = TSql. Transaction. Create(nil); with FConn dobegin. Database. Name : = 'TEST- DATABASE'; User.
Name : = 'SYSDBA'; Password : = 'masterkey'; Host. Name : = 'localhost'; Connected : = True; Transaction : = FTransaction; FQuery. Database : = FConn; end; end; Procedure TCGIApp. Handle. Request(ARequest : Trequest; AResponse : TResponse); varl. Person: TJSONObject; l. Json: TJSONObject; l.
Json. Array: TJSONArray; begin(* Query the database *)FQuery. Sql. Text : = 'select * from people'; FQuery. Open; FQuery. First; l. Json. Array : = TJSONArray. Create; l. Json : = TJSONObject. Create; trywhile not FQuery. Eof dobeginl. Person : = TJSONObject.
Create; l. Person. Add('firstname', TJson.
String. Create(FQuery. Field. By. Name('First. Name'). As. String)); l.
Person. Add('lastname', TJson. String. Create(FQuery. Field. By. Name('Last.
Name'). As. String)); l. Person. Add('age', TJSONInteger. Number. Create(FQuery. Field. By. Name('Age'). As. Integer)); l. Person. Add('phone', TJson. String. Create(FQuery.
Field. By. Name('Phone'). As. String)); FQuery. Next; (* Fill the array *)l.
Json. Array. Add(l. Person); end; (* Add the array to rows property *)l. Json. Add('rows', l. Json. Array); AResponse. Content : = l. Json. As. JSON; finallyl.
Json. Free; end; end; begin. With TCGIApp. Create(Nil) dotry. Initialize; Connect. To. Database; Run; finally.
Free; end; end. The second part of this series, will focus onadding some CRUD (create, read, update and delete) functionsto the application. Click here to download the source files.
I hope you enjoy this article as much as I did writing it.