This Article will explain you a different ways to parse HTML in Flutter. Follow the complete article to learn how to parse HTML in Flutter for android & iOS.
My presentation a GDG Bronx Flutter Study Jam 2. DartPad, String Interpolation, Debug Print, HotReload, TimeStamps, Dates, Duration, Passing data to a screen, UI Pattern - Refresh, Load more data, HTTP
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My presentation a GDG Bronx Flutter Study Jam 2. DartPad, String Interpolation, Debug Print, HotReload, TimeStamps, Dates, Duration, Passing data to a screen, UI Pattern - Refresh, Load more data, HTTP
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I presented this as a seminar in the partial fulfillment of my B.Tech. degree program at College of Technology, G B Pant University of Agriculture & Technology, Pantnagar, India.
We code a RGB LED light on the Arduino board and a breadboard on which we switch off or on the light by a browser on an android device with our own web server and their COM protocols.
This presentation covers HTML basics for website and web development by iFour Technolab Pvt. Ltd.
Presentation covers following broad topics.
- Introduction To HTML
- Creating HTML Pages
- HTML Structure
- HTML Code Formatting
- HTML Structure
- HTML Code Formatting
- First HTML Page
- First HTML Page: Tags
- Tags Attributes
- Headings and Paragraphs
- Text Formatting
- Block and Inline Elements
- HTML Tables
- Form Fields
In this session, we will look first at the rich metadata that documents in your repository have, how to control the mapping of this on to your content model, and some of the interesting things this can deliver. We'll then move on to the content transformation and rendition services, and see how you can easily and powerfully generate a wide range of media from the content you already have.
1 Web Page Foundations Overview This lab walk.docxhoney725342
1
Web Page Foundations
Overview
This lab walks you through creating and deploying a simple web page. The web page you create in this
lab will have no functionality yet. It just contains many of the html elements you will see on most web
pages today. We will turn this web page into a working web application next week. A text editor will be
used to create the web page. You are welcome to use an html editor or Integrated Development
Environment (IDE) to help you generate the web pages if you like. Please be sure you have read the
“Creating Web Pages” competencies prior to completing this Lab. The online textbook has many html
code examples that will help you become comfortable with the most popular html tags.
Learning Outcomes:
At the completion of the lab you should be able to:
1. Create a web page comprised of formatted text, images, lists, tables, hyperlinks and forms.
2. Review and analyze Apache Web server logs notating http access, http methods and http error
codes
Lab Submission Requirements:
After completing this lab, you will submit a word (or PDF) document that meets all of the requirements in
the description at the end of this document. In addition several html and image files along with the
Apache2 access.log file will be submitted. You can submit all files in a zip file.
Virtual Machine Account Information
Your Virtual Machine has been preconfigured with all of the software you will need for this class. The
default username and password are:
Username : umucsdev
Password: umuc$d8v
Part 1 – Create a Web page
We will use the gedit text editor to create the web page. The web page will resemble a company home
page with an introduction, some formatted text, links to other web pages, images and a form designed
to gather customer information.
1. Assuming you have already launched and logged into your SDEV32Bit Virtual Machine (VM)
from the Oracle VirtualBox, click on the gedit icon found on the left side of the screen of your
VM.
2
2. After clicking the terminal icon a terminal will appear
Click to open text editor
3
3. To create a new document just begin typing or copying and pasting the html code from the
examples. We will create the web page in several steps adding a few paragraphs and sections at
time. Viewing the web page between each step will help minimize errors in the html code. To
add the first section of the html web page copy and paste the following html code into the gedit
editor:
<!DOCTYPE html>
<!-- CNShome.html -->
<!-- Jan 22, XXXX -->
<html>
<head>
<title>Computer Security Home Page </title>
</head>
<body>
<h1>Welcome to Computer Security Consultants! </h1>
<p>
</body>
</html>
Save the file in the /var/www/html/week2 folder in a file named CNShome.html. Note, you may need to
create a folder named week2. Recall the /var/www/html is the location of the Apache2 web server html
files. Creating ...
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- Dynamic variables substitutions (in xml files)
- Ajax callbacks
- jQuery use case
- Dynamic Memory allocation (malloc/free) (see heap.s)
- Web service calls : for tweeter, thingspeak and nimbits
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I presented this as a seminar in the partial fulfillment of my B.Tech. degree program at College of Technology, G B Pant University of Agriculture & Technology, Pantnagar, India.
We code a RGB LED light on the Arduino board and a breadboard on which we switch off or on the light by a browser on an android device with our own web server and their COM protocols.
This presentation covers HTML basics for website and web development by iFour Technolab Pvt. Ltd.
Presentation covers following broad topics.
- Introduction To HTML
- Creating HTML Pages
- HTML Structure
- HTML Code Formatting
- HTML Structure
- HTML Code Formatting
- First HTML Page
- First HTML Page: Tags
- Tags Attributes
- Headings and Paragraphs
- Text Formatting
- Block and Inline Elements
- HTML Tables
- Form Fields
In this session, we will look first at the rich metadata that documents in your repository have, how to control the mapping of this on to your content model, and some of the interesting things this can deliver. We'll then move on to the content transformation and rendition services, and see how you can easily and powerfully generate a wide range of media from the content you already have.
1 Web Page Foundations Overview This lab walk.docxhoney725342
1
Web Page Foundations
Overview
This lab walks you through creating and deploying a simple web page. The web page you create in this
lab will have no functionality yet. It just contains many of the html elements you will see on most web
pages today. We will turn this web page into a working web application next week. A text editor will be
used to create the web page. You are welcome to use an html editor or Integrated Development
Environment (IDE) to help you generate the web pages if you like. Please be sure you have read the
“Creating Web Pages” competencies prior to completing this Lab. The online textbook has many html
code examples that will help you become comfortable with the most popular html tags.
Learning Outcomes:
At the completion of the lab you should be able to:
1. Create a web page comprised of formatted text, images, lists, tables, hyperlinks and forms.
2. Review and analyze Apache Web server logs notating http access, http methods and http error
codes
Lab Submission Requirements:
After completing this lab, you will submit a word (or PDF) document that meets all of the requirements in
the description at the end of this document. In addition several html and image files along with the
Apache2 access.log file will be submitted. You can submit all files in a zip file.
Virtual Machine Account Information
Your Virtual Machine has been preconfigured with all of the software you will need for this class. The
default username and password are:
Username : umucsdev
Password: umuc$d8v
Part 1 – Create a Web page
We will use the gedit text editor to create the web page. The web page will resemble a company home
page with an introduction, some formatted text, links to other web pages, images and a form designed
to gather customer information.
1. Assuming you have already launched and logged into your SDEV32Bit Virtual Machine (VM)
from the Oracle VirtualBox, click on the gedit icon found on the left side of the screen of your
VM.
2
2. After clicking the terminal icon a terminal will appear
Click to open text editor
3
3. To create a new document just begin typing or copying and pasting the html code from the
examples. We will create the web page in several steps adding a few paragraphs and sections at
time. Viewing the web page between each step will help minimize errors in the html code. To
add the first section of the html web page copy and paste the following html code into the gedit
editor:
<!DOCTYPE html>
<!-- CNShome.html -->
<!-- Jan 22, XXXX -->
<html>
<head>
<title>Computer Security Home Page </title>
</head>
<body>
<h1>Welcome to Computer Security Consultants! </h1>
<p>
</body>
</html>
Save the file in the /var/www/html/week2 folder in a file named CNShome.html. Note, you may need to
create a folder named week2. Recall the /var/www/html is the location of the Apache2 web server html
files. Creating ...
How to Integrate Internet of Things with Webserver with Ionela
The project is integrating several technologies, found during the investigation of Flyport :
- Web server
- Wifi connection
- Dynamic variables substitutions (in xml files)
- Ajax callbacks
- jQuery use case
- Dynamic Memory allocation (malloc/free) (see heap.s)
- Web service calls : for tweeter, thingspeak and nimbits
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HTML Parsing in FLUTTER for Android or iOS Development.pptx
1.
2. HTML Parsing in FLUTTER for Android / iOS
Development
The HTML parser is the structured markup processing tool defining the
HTML Parser class. It is often accessed to parse HTML files. Parsing is to
resolve into component parts and then describe their syntactic roles.
In general, parsing analyzes the String of the symbols in computer or
natural languages. When speaking about HTML parsing, it takes the
HTML code and extracts the relevant information, such as the page’s
title, headings, paragraphs, links, bold text, and much more.
Keep reading this article to learn much about HTML parsing in Flutter
for android or iOS platforms! If you need professional assistance, do
not hesitate to contact the reputable and trustworthy Flutter app
development company.
3. Introduction to flutter HTML
Flutter is an open-source, cross-platform mobile app development
framework. It is highly compatible with the present web rendering
technologies such as HTML, JavaScript, and CSS.
Therefore, it is a perfect platform for web and mobile app
development. With the help of Flutter developers, you can compile the
existing code into the client experience, implant it into the browser and
finally deploy it to any web server.
4. When you build the application with Flutter and need to render some
HTML content, you can do it easily by accessing the plugin flutter_html.
You can add flutter_html and its latest version to the dependencies
section in pubspec.yaml file using the command “flutter pub add
flutter_html.” Then, you have to use “flutter pub get” to execute the
command.
5. How to do HTML parsing in Flutter
Android developers use the Jsoup library to parse HTML text and code.
But, developers new to the flutter mobile app development do not
know the existence of such a library to parse HTML text and code from
the website in Flutter.
So, are you thinking about the right way to perform HTML parsing in
Flutter for Android or iOS development? Well! Here are the two
different solutions to meet your demands.
6. Solution: 1
You can now parse the HTML string in this way.
import ‘package:html/parser.dart’;
//here goes the function
String _parseHtmlString(String htmlString) {
var document = parse(htmlString);
String parsedString = parse(document.body.text).documentElement.text;
return parsedString;
}
Solution: 2
Next, you have to fetch data using http.get(url) to the user parser, and
then you can parse whatever you want. Follow the below-mentioned
code properly.
7. Fetch HTML page:
Future<string> fetchHTML(String url) async {
final response = await http.get(url);
if (response.statusCode == 200)
return response.body;
else throw Exception('Failed');
}</string>
After that, you should call FutureBuilder()
9. Now, you can parse it:
parse(_temp);
Other ways to parse HTML in Flutter
Method: 1
Are you accessing Flutter? Do you wish to parse HTML using
parser.dart? If yes, then run the following code.
11. You may have to use the following command to get this data.
import 'package:html/parser dart’;
output:
19.8,23,93%,south 2.2km/h
Method: 2
Since you access the HTML package, you can obtain the desired data by
accessing some HTML parsing and string processing whenever needed.
Here is the dart sample where you can utilize the parse data function in
your flutter application.
14. //declaring a list of String to hold all the data.
List<string> data = []
data.add(document.getElementsByClassName("time")[0].innerHtml);
//declaring a variable for temp since you use it in multiple places
var temp = document.getElementsByClassName("temp")[0];
data.add(temp.innerHtml.substring(0, temp.innerHtml.indexOf("<span>")));
data.add(temp.getElementsByTagName("small")[0].innerHtml.replaceAll(RegExp("[(|)|℃]"), ""));
//You can also do document.getElementsByTagName("td") but it is more specific here.
var rows = document.getElementsByTagName("table")[0].getElementsByTagName("td");
//Map element to its innerHtml,
because we're gonna need it.
//Iterate over the table-data and then store it safely in the data list
rows.map((e) => e.innerHtml).forEach((element) {
if(element != "-"){
data.add(element);
}
});
//print the data to console.
print(data);
}</span></string></string>
15. Output
How to parse HTML tags in Flutter
Do you need to parse HTML tags in your flutter project? Well! You can
follow the steps mentioned here to meet your needs instantly.
At first, you should create the flutter application.
Then, you must add the required plugins in pubspec.yaml file as
mentioned below.
16. dev_dependencies:
flutter_test:
sdk: Flutter
html: ^0.15.0
http: ^0.13.3
flutter_html: ^2.1.0
Now, you have to read the HTML file from the URL. Once you mention
the site, it reads the data online. Use the http:package to read the
data you have accessed and get the http class.
var response=await http.Client().get(Uri.parse(widget.url));
Now, you have HTML data fetched from the URL by accessing the
HTTP package. So, it is the right time to parse the fetched content.
You can use the below code to parse the HTML tags.
17. var chapters = document.getElementsByClassName("chapters");
chapters.forEach((element) {
var inner = element.innerHtml.toString();
if (inner.contains("href")) {
parse(inner).getElementsByTagName("li").forEach((element) {
var list = element.innerHtml;
if (list.contains("href")) {
//
indexlist_local.add(list.substring(list.indexOf("href=")+6,list.indexOf(">")-1));
indexlist_local.add(IndexContent(title: element.text,
path: list.substring(
list.indexOf("href=") + 6, list.indexOf(">") - 1)));
}
});
}
});
This code is written for fetching the data from the indexed tutorial
page “chapters.” According to the URL you choose, you can change
the index tag.
Finally, you can run the application successfully.
18. Conclusion
So, you will now be aware of the HTML parsing in Flutter for
android/iOS development. If you do not get the desired result even
after trying all the possible ways, you should seek professional
assistance. Hire Flutter developer to get assistance in HTML parsing and
complete your flutter project without hassle.
Source: https://flutteragency.com/html-parsing-flutter-android-ios-
development/