1679170380
AngleSharp is a .NET library that gives you the ability to parse angle bracket based hyper-texts like HTML, SVG, and MathML. XML without validation is also supported by the library. An important aspect of AngleSharp is that CSS can also be parsed. The included parser is built upon the official W3C specification. This produces a perfectly portable HTML5 DOM representation of the given source code and ensures compatibility with results in evergreen browsers. Also standard DOM features such as querySelector
or querySelectorAll
work for tree traversal.
⚡⚡ Migrating from AngleSharp 0.9 to AngleSharp 0.10 or later (incl. 1.0)? Look at our migration documentation. ⚡⚡
BrowsingContext
is like a browser tab - control it from .NET!).The advantage over similar libraries like HtmlAgilityPack is that the exposed DOM is using the official W3C specified API, i.e., that even things like querySelectorAll
are available in AngleSharp. Also the parser uses the HTML 5.1 specification, which defines error handling and element correction. The AngleSharp library focuses on standards compliance, interactivity, and extensibility. It is therefore giving web developers working with C# all possibilities as they know from using the DOM in any modern browser.
The performance of AngleSharp is quite close to the performance of browsers. Even very large pages can be processed within milliseconds. AngleSharp tries to minimize memory allocations and reuses elements internally to avoid unnecessary object creation.
The simple example will use the website of Wikipedia for data retrieval.
var config = Configuration.Default.WithDefaultLoader();
var address = "https://en.wikipedia.org/wiki/List_of_The_Big_Bang_Theory_episodes";
var context = BrowsingContext.New(config);
var document = await context.OpenAsync(address);
var cellSelector = "tr.vevent td:nth-child(3)";
var cells = document.QuerySelectorAll(cellSelector);
var titles = cells.Select(m => m.TextContent);
Or the same with explicit types:
IConfiguration config = Configuration.Default.WithDefaultLoader();
string address = "https://en.wikipedia.org/wiki/List_of_The_Big_Bang_Theory_episodes";
IBrowsingContext context = BrowsingContext.New(config);
IDocument document = await context.OpenAsync(address);
string cellSelector = "tr.vevent td:nth-child(3)";
IHtmlCollection<IElement> cells = document.QuerySelectorAll(cellSelector);
IEnumerable<string> titles = cells.Select(m => m.TextContent);
In the example we see:
Every collection in AngleSharp supports LINQ statements. AngleSharp also provides many useful extension methods for element collections that cannot be found in the official DOM.
AngleSharp has been created as a .NET Standard 2.0 compatible library. This includes, but is not limited to:
The documentation of AngleSharp is located in the docs folder. More examples, best-practices, and general information can be found there. The documentation also contains a list of frequently asked questions.
More information is also available by following some of the hyper references mentioned in the Wiki. In-depth articles will be published on the CodeProject, with links being placed in the Wiki at GitHub.
The project aims to bring a solid implementation of the W3C DOM for HTML, SVG, MathML, and CSS to the CLR - all written in C#. The idea is that you can basically do everything with the DOM in C# that you can do in JavaScript (plus, of course, more).
Most parts of the DOM are included, even though some may still miss their (fully specified / correct) implementation. The goal for v1.0 is to have all practically relevant parts implemented according to the official W3C specification (with useful extensions by the WHATWG).
The API is close to the DOM4 specification, however, the naming has been adjusted to apply with .NET conventions. Nevertheless, to make AngleSharp really useful for, e.g., a JavaScript engine, attributes have been placed on the corresponding interfaces (and methods, properties, ...) to indicate the status of the field in the official specification. This allows automatic generation of DOM objects with the official API.
This is a long-term project which will eventually result in a state of the art parser for the most important angle bracket based hyper-texts.
Our hope is to build a community around web parsing and libraries from this project. So far we had great contributions, but that goal was not fully achieved. Want to help? Get in touch with us!
If you know some feature that AngleSharp is currently missing, and you are willing to implement the feature, then your contribution is more than welcome! Also if you have a really cool idea - do not be shy, we'd like to hear it.
If you have an idea how to improve the API (or what is missing) then posts / messages are also welcome. For instance there have been ongoing discussions about some styles that have been used by AngleSharp (e.g., HTMLDocument
or HtmlDocument
) in the past. In the end AngleSharp stopped using HTMLDocument
(at least visible outside of the library). Now AngleSharp uses names like IDocument
, IHtmlElement
and so on. This change would not have been possible without such fruitful discussions.
The project is always searching for additional contributors. Even if you do not have any code to contribute, but rather an idea for improvement, a bug report or a mistake in the documentation. These are the contributions that keep this project active.
Live discussions can take place in our Gitter chat, which supports using GitHub accounts.
More information is found in the contribution guidelines. All contributors can be found in the CONTRIBUTORS file.
This project has also adopted the code of conduct defined by the Contributor Covenant to clarify expected behavior in our community.
For more information see the .NET Foundation Code of Conduct.
If you use AngleSharp frequently, but you do not have the time to support the project by active participation you may still be interested to ensure that the AngleSharp projects keeps the lights on.
Therefore we created a backing model via Bountysource. Any donation is welcome and much appreciated. We will mostly spend the money on dedicated development time to improve AngleSharp where it needs to be improved, plus invest in the web utility eco-system in .NET (e.g., in JavaScript engines, other parsers, or a renderer for AngleSharp to mention some outstanding projects).
Visit Bountysource for more details.
AngleSharp is written in the most recent version of C# and thus requires Roslyn as a compiler. Using an IDE like Visual Studio 2019+ is recommended on Windows. Alternatively, VSCode (with OmniSharp or another suitable Language Server Protocol implementation) should be the tool of choice on other platforms.
The code tries to be as clean as possible. Notably the following rules are used:
-Async
suffixed methods when availableMore important, however, is the proper usage of tests. Any new feature should come with a set of tests to cover the functionality and prevent regression.
A very detailed changelog exists. If you are just interested in major releases then have a look at the GitHub releases.
This project is supported by the .NET Foundation.
Author: AngleSharp
Source Code: https://github.com/AngleSharp/AngleSharp
License: MIT license
#csharp #html #linq #library #dom #hacktoberfest
1679170380
AngleSharp is a .NET library that gives you the ability to parse angle bracket based hyper-texts like HTML, SVG, and MathML. XML without validation is also supported by the library. An important aspect of AngleSharp is that CSS can also be parsed. The included parser is built upon the official W3C specification. This produces a perfectly portable HTML5 DOM representation of the given source code and ensures compatibility with results in evergreen browsers. Also standard DOM features such as querySelector
or querySelectorAll
work for tree traversal.
⚡⚡ Migrating from AngleSharp 0.9 to AngleSharp 0.10 or later (incl. 1.0)? Look at our migration documentation. ⚡⚡
BrowsingContext
is like a browser tab - control it from .NET!).The advantage over similar libraries like HtmlAgilityPack is that the exposed DOM is using the official W3C specified API, i.e., that even things like querySelectorAll
are available in AngleSharp. Also the parser uses the HTML 5.1 specification, which defines error handling and element correction. The AngleSharp library focuses on standards compliance, interactivity, and extensibility. It is therefore giving web developers working with C# all possibilities as they know from using the DOM in any modern browser.
The performance of AngleSharp is quite close to the performance of browsers. Even very large pages can be processed within milliseconds. AngleSharp tries to minimize memory allocations and reuses elements internally to avoid unnecessary object creation.
The simple example will use the website of Wikipedia for data retrieval.
var config = Configuration.Default.WithDefaultLoader();
var address = "https://en.wikipedia.org/wiki/List_of_The_Big_Bang_Theory_episodes";
var context = BrowsingContext.New(config);
var document = await context.OpenAsync(address);
var cellSelector = "tr.vevent td:nth-child(3)";
var cells = document.QuerySelectorAll(cellSelector);
var titles = cells.Select(m => m.TextContent);
Or the same with explicit types:
IConfiguration config = Configuration.Default.WithDefaultLoader();
string address = "https://en.wikipedia.org/wiki/List_of_The_Big_Bang_Theory_episodes";
IBrowsingContext context = BrowsingContext.New(config);
IDocument document = await context.OpenAsync(address);
string cellSelector = "tr.vevent td:nth-child(3)";
IHtmlCollection<IElement> cells = document.QuerySelectorAll(cellSelector);
IEnumerable<string> titles = cells.Select(m => m.TextContent);
In the example we see:
Every collection in AngleSharp supports LINQ statements. AngleSharp also provides many useful extension methods for element collections that cannot be found in the official DOM.
AngleSharp has been created as a .NET Standard 2.0 compatible library. This includes, but is not limited to:
The documentation of AngleSharp is located in the docs folder. More examples, best-practices, and general information can be found there. The documentation also contains a list of frequently asked questions.
More information is also available by following some of the hyper references mentioned in the Wiki. In-depth articles will be published on the CodeProject, with links being placed in the Wiki at GitHub.
The project aims to bring a solid implementation of the W3C DOM for HTML, SVG, MathML, and CSS to the CLR - all written in C#. The idea is that you can basically do everything with the DOM in C# that you can do in JavaScript (plus, of course, more).
Most parts of the DOM are included, even though some may still miss their (fully specified / correct) implementation. The goal for v1.0 is to have all practically relevant parts implemented according to the official W3C specification (with useful extensions by the WHATWG).
The API is close to the DOM4 specification, however, the naming has been adjusted to apply with .NET conventions. Nevertheless, to make AngleSharp really useful for, e.g., a JavaScript engine, attributes have been placed on the corresponding interfaces (and methods, properties, ...) to indicate the status of the field in the official specification. This allows automatic generation of DOM objects with the official API.
This is a long-term project which will eventually result in a state of the art parser for the most important angle bracket based hyper-texts.
Our hope is to build a community around web parsing and libraries from this project. So far we had great contributions, but that goal was not fully achieved. Want to help? Get in touch with us!
If you know some feature that AngleSharp is currently missing, and you are willing to implement the feature, then your contribution is more than welcome! Also if you have a really cool idea - do not be shy, we'd like to hear it.
If you have an idea how to improve the API (or what is missing) then posts / messages are also welcome. For instance there have been ongoing discussions about some styles that have been used by AngleSharp (e.g., HTMLDocument
or HtmlDocument
) in the past. In the end AngleSharp stopped using HTMLDocument
(at least visible outside of the library). Now AngleSharp uses names like IDocument
, IHtmlElement
and so on. This change would not have been possible without such fruitful discussions.
The project is always searching for additional contributors. Even if you do not have any code to contribute, but rather an idea for improvement, a bug report or a mistake in the documentation. These are the contributions that keep this project active.
Live discussions can take place in our Gitter chat, which supports using GitHub accounts.
More information is found in the contribution guidelines. All contributors can be found in the CONTRIBUTORS file.
This project has also adopted the code of conduct defined by the Contributor Covenant to clarify expected behavior in our community.
For more information see the .NET Foundation Code of Conduct.
If you use AngleSharp frequently, but you do not have the time to support the project by active participation you may still be interested to ensure that the AngleSharp projects keeps the lights on.
Therefore we created a backing model via Bountysource. Any donation is welcome and much appreciated. We will mostly spend the money on dedicated development time to improve AngleSharp where it needs to be improved, plus invest in the web utility eco-system in .NET (e.g., in JavaScript engines, other parsers, or a renderer for AngleSharp to mention some outstanding projects).
Visit Bountysource for more details.
AngleSharp is written in the most recent version of C# and thus requires Roslyn as a compiler. Using an IDE like Visual Studio 2019+ is recommended on Windows. Alternatively, VSCode (with OmniSharp or another suitable Language Server Protocol implementation) should be the tool of choice on other platforms.
The code tries to be as clean as possible. Notably the following rules are used:
-Async
suffixed methods when availableMore important, however, is the proper usage of tests. Any new feature should come with a set of tests to cover the functionality and prevent regression.
A very detailed changelog exists. If you are just interested in major releases then have a look at the GitHub releases.
This project is supported by the .NET Foundation.
Author: AngleSharp
Source Code: https://github.com/AngleSharp/AngleSharp
License: MIT license
1654219543
Gumbo - A pure-C HTML5 parser.
Gumbo is an implementation of the HTML5 parsing algorithm implemented as a pure C99 library with no outside dependencies. It's designed to serve as a building block for other tools and libraries such as linters, validators, templating languages, and refactoring and analysis tools.
Goals & features:
Non-goals:
Wishlist (aka "We couldn't get these into the original release, but are hoping to add them soon"):
Installation
To build and install the library, issue the standard UNIX incantation from the root of the distribution:
$ ./autogen.sh
$ ./configure
$ make
$ sudo make install
Gumbo comes with full pkg-config support, so you can use the pkg-config to print the flags needed to link your program against it:
$ pkg-config --cflags gumbo # print compiler flags
$ pkg-config --libs gumbo # print linker flags
$ pkg-config --cflags --libs gumbo # print both
For example:
$ gcc my_program.c `pkg-config --cflags --libs gumbo`
See the pkg-config man page for more info.
There are a number of sample programs in the examples/ directory. They're built automatically by 'make', but can also be made individually with make <programname>
(eg. make clean_text
).
To run the unit tests, you'll need to have googletest downloaded and unzipped. The googletest maintainers recommend against using make install
; instead, symlink the root googletest directory to 'gtest' inside gumbo's root directory, and then make check
:
$ unzip gtest-1.6.0.zip
$ cd gumbo-*
$ ln -s ../gtest-1.6.0 gtest
$ make check
Gumbo's make check
has code to automatically configure & build gtest and then link in the library.
Debian and Fedora users can install libgtest with:
$ apt-get install libgtest-dev # Debian/Ubuntu
$ yum install gtest-devel # CentOS/Fedora
Note for Ubuntu users: libgtest-dev package only install source files. You have to make libraries yourself using cmake:
$ sudo apt-get install cmake
$ cd /usr/src/gtest
$ sudo cmake CMakeLists.txt
$ sudo make
$ sudo cp *.a /usr/lib
The configure script will detect the presence of the library and use that instead.
Note that you need to have super user privileges to execute these commands. On most distros, you can prefix the commands above with sudo
to execute them as the super user.
Debian installs usually don't have sudo
installed (Ubuntu however does.) Switch users first with su -
, then run apt-get
.
Basic Usage
Within your program, you need to include "gumbo.h" and then issue a call to gumbo_parse
:
#include "gumbo.h"
int main() {
GumboOutput* output = gumbo_parse("<h1>Hello, World!</h1>");
// Do stuff with output->root
gumbo_destroy_output(&kGumboDefaultOptions, output);
}
See the API documentation and sample programs for more details.
A note on API/ABI compatibility
We'll make a best effort to preserve API compatibility between releases. The initial release is a 0.9 (beta) release to solicit comments from early adopters, but if no major problems are found with the API, a 1.0 release will follow shortly, and the API of that should be considered stable. If changes are necessary, we follow semantic versioning.
We make no such guarantees about the ABI, and it's very likely that subsequent versions may require a recompile of client code. For this reason, we recommend NOT using Gumbo data structures throughout a program, and instead limiting them to a translation layer that picks out whatever data is needed from the parse tree and then converts that to persistent data structures more appropriate for the application. The API is structured to encourage this use, with a single delete function for the whole parse tree, and is not designed with mutation in mind.
Python usage
To install the python bindings, make sure that the C library is installed first, and then sudo python setup.py install
from the root of the distro. This installs a 'gumbo' module; pydoc gumbo
should tell you about it.
Recommended best-practice for Python usage is to use one of the adapters to an existing API (personally, I prefer BeautifulSoup) and write your program in terms of those. The raw CTypes bindings should be considered building blocks for higher-level libraries and rarely referenced directly.
External Bindings and other wrappers
The following language bindings or other tools/wrappers are maintained by various contributors in other repositories:
Author: google
Source Code: https://github.com/google/gumbo-parser
License: Apache-2.0 license
1593251880
JSON uses two types of brackets that are as follows:
JSON has the following types of structures that are:
1. JSON Objects
The elements inside the curly brackets are known as Objects.
2. JSON Array
A list of values, known as Arrays.
3. JSON Key-Value
This data is stored as a pair of keys and values. Here the keys can be a name, a number for which the values can be Seema, 98767586 etc.
Let us see some reasons for why to choose JSON over XML:
Let us see the code difference of JSON and XML files:
XML Example:
<?xml version= “1.0” encoding= “” ?>
<student>
<student>
<name> Sia Sharma</name>
<city> Chandigarh</city>
</student>
<student>
<name>Dimple D’souza</name>
<city> Nagpur</city>
</student>
<student>
<name>Anna Jones</name>
<city> Mumbai</city>
</student>
</student>
JSON Example:
{ “students”: [
{ “name”: “Sia Sharma”, “city”: “Chandigarh”},
{ “name”: “Prachi D’Souza”, “city”: “Nagpur”},
{ “name”: “Annas Jones”, “city”: “Mumbai”}
]}
I hope the difference is all clear in front of you. This is how simple JSON is and how easily it could be understood.
#android tutorials #json parsing in android #json parsing in android example #json parsing in android step by step #json parsing with android #read json file android
1625629740
In this tutorial, we’ll be talking about what a library is and how they are useful. We will be looking at some examples in C, including the C Standard I/O Library and the C Standard Math Library, but these concepts can be applied to many different languages. Thank you for watching and happy coding!
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Also check out…
What is a Framework? https://youtu.be/HXqBlAywTjU
What is a JSON Object? https://youtu.be/nlYiOcMNzyQ
What is an API? https://youtu.be/T74OdSCBJfw
What are API Keys? https://youtu.be/1yFggyk--Zo
Using APIs with Postman https://youtu.be/0LFKxiATLNQ
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Command Line: https://www.youtube.com/watch?v=Jm8-UFf8IMg&index=1&list=PLcLMSci1ZoPvbvAIn_tuSzMgF1c7VVJ6e
30 Days of Code: https://www.youtube.com/watch?v=K5WxmFfIWbo&index=2&list=PLcLMSci1ZoPs6jV0O3LBJwChjRon3lE1F
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#blondiebytes #c library #code tutorial #library
1626782520
Want to learn HTML5 and CSS3 from scratch?
This is the 21st episode of my “Learn HTML5 and CSS3” course. In this course, we will learn everything about how we can create markup for a website. At the end of the course, I will add some full tutorials where I will be creating famous websites from scratch. So, if you have any suggestions, just let me know and I might make a video about it!
In this video, I want to insert a video inside an HTML page in two different ways. The first way will be creating a new folder in our root folder where we will place our video, then we will be using the video element to add the video.
The second way is by using an iFrame from YouTube. This will let us upload a video from an external source.
#css3 #html5 #html5 videos