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Html parser

Solved General and Desktop

20 Posts 9 Posters 4.0k Views 5 Watching

S satyanarayana143

@SGaist said in Html parser:

href="(.*)"

can you give some example how to extract href with regex

<html>
<head><title>Index of /satfiles/</title></head>
<body bgcolor="white">
<h1>Index of /satfiles/</h1><hr><pre><a href="../">../</a>
<a href="test1.txt">test1.txt</a> 28-Oct-2018 08:08 14
<a href="test2.txt">test2.txt</a> 28-Oct-2018 08:09 13
<a href="yazmifiletest.ts">yazmifiletest.ts</a> 28-Oct-2018 08:09 30
</pre><hr></body>
</html>
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koahnig

wrote on last edited by

#9

@satyanarayana143

Try out with the QRegularExpression example

In contrast to the single line version of the QRegExp example you can test short text sections.
Vote the answer(s) that helped you to solve your issue(s)
1 Reply Last reply

2

Hi
Something like

QString html = R"(
        <html>
        <head><title>Index of /satfiles/</title></head>
        <body bgcolor="white">
        <h1>Index of /satfiles/</h1><hr><pre><a href="../">../</a>
        <a href="test1.txt">test1.txt</a> 28-Oct-2018 08:08 14
        <a href="test2.txt">test2.txt</a> 28-Oct-2018 08:09 13
        <a href="yazmifiletest.ts">yazmifiletest.ts</a> 28-Oct-2018 08:09 30
        </pre><hr></body>
        </html>)";

QString regex = R"(href="([^"]*))";
----
 QRegularExpression re(regex);
  QRegularExpressionMatchIterator i = re.globalMatch(html);
  while (i.hasNext()) {
    QRegularExpressionMatch match = i.next();
    qDebug().noquote() << match.captured();
  }

Gets you

href="../
href="test1.txt
href="test2.txt
href="yazmifiletest.ts

you can use
https://regexr.com/
to tweak the expression to match exactly.

satyanarayana143

wrote on

#10

thakk you for giving solution i want like this only i have solved my problem.

Hi
Something like

QString html = R"(
        <html>
        <head><title>Index of /satfiles/</title></head>
        <body bgcolor="white">
        <h1>Index of /satfiles/</h1><hr><pre><a href="../">../</a>
        <a href="test1.txt">test1.txt</a> 28-Oct-2018 08:08 14
        <a href="test2.txt">test2.txt</a> 28-Oct-2018 08:09 13
        <a href="yazmifiletest.ts">yazmifiletest.ts</a> 28-Oct-2018 08:09 30
        </pre><hr></body>
        </html>)";

QString regex = R"(href="([^"]*))";
----
 QRegularExpression re(regex);
  QRegularExpressionMatchIterator i = re.globalMatch(html);
  while (i.hasNext()) {
    QRegularExpressionMatch match = i.next();
    qDebug().noquote() << match.captured();
  }

Gets you

href="../
href="test1.txt
href="test2.txt
href="yazmifiletest.ts

you can use
https://regexr.com/
to tweak the expression to match exactly.

wrote on

#11

@mrjj said in Html parser:

R

sir in this what does R mean for in the QString html

M ManiRon

@mrjj said in Html parser:

R

sir in this what does R mean for in the QString html
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aha_1980
Lifetime Qt Champion
wrote on last edited by

#12

@ManiRon: https://solarianprogrammer.com/2011/10/16/cpp-11-raw-strings-literals-tutorial
Qt has to stay free or it will die.
M 1 Reply Last reply

1
A aha_1980

@ManiRon: https://solarianprogrammer.com/2011/10/16/cpp-11-raw-strings-literals-tutorial
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ManiRon

wrote on last edited by

#13

@aha_1980 said in Html parser:

https://solarianprogrammer.com/2011/10/16/cpp-11-raw-strings-literals-tutorial

error: 'R' was not declared in this scope
QString qHtml = R"(<button type="button">Click Me!</button>)";
^
M 1 Reply Last reply

0
M ManiRon

@aha_1980 said in Html parser:

https://solarianprogrammer.com/2011/10/16/cpp-11-raw-strings-literals-tutorial

error: 'R' was not declared in this scope
QString qHtml = R"(<button type="button">Click Me!</button>)";
^
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mrjj
Lifetime Qt Champion
wrote on last edited by

#14

@ManiRon
Hi
Code seems fine - so it must be compiler version.

Is it an older Qt / Compiler ?

Its a c++ 11 feature with R (raw strings)
M 1 Reply Last reply

1
M mrjj

@ManiRon
Hi
Code seems fine - so it must be compiler version.

Is it an older Qt / Compiler ?

Its a c++ 11 feature with R (raw strings)
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ManiRon

wrote on last edited by

#15

@mrjj its Qt 5.5
M 1 Reply Last reply

0
M ManiRon

@mrjj its Qt 5.5
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mrjj
Lifetime Qt Champion
wrote on last edited by

#16

@ManiRon
Hi
Can you try to add
CONFIG += c++11
in your .pro file
then run qmake and rebuild all (from menu) and see if it accepts it then.
M 2 Replies Last reply

0
M mrjj

@ManiRon
Hi
Can you try to add
CONFIG += c++11
in your .pro file
then run qmake and rebuild all (from menu) and see if it accepts it then.
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ManiRon

wrote on last edited by

#17

@mrjj said in Html parser:

CONFIG += c++11

i will check and say sir
1 Reply Last reply

0
M mrjj

@ManiRon
Hi
Can you try to add
CONFIG += c++11
in your .pro file
then run qmake and rebuild all (from menu) and see if it accepts it then.
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ManiRon

wrote on last edited by ManiRon

#18
@mrjj
1. It worked sir
2. But i am trying to create a button as you can see in the previous code its just displaying the text click me and not the button in the HTML file
3. I know that in the list of attribute supported by QT <button> tag is not there whether we can make QT to make work on this
M 1 Reply Last reply

0
M ManiRon
@mrjj
1. It worked sir
2. But i am trying to create a button as you can see in the previous code its just displaying the text click me and not the button in the HTML file
3. I know that in the list of attribute supported by QT <button> tag is not there whether we can make QT to make work on this
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mrjj
Lifetime Qt Champion
wrote on last edited by mrjj

#19

@ManiRon
Hi
Super. so was just c+11 support.
The QT widgets cannot draw html Buttons so if you
view them in textEdit/Browser no buttons can be shown.

I know no easy way to have buttons, but you can try with
Qt WebEngine
instead and see if it likes it.
M 1 Reply Last reply

1
M mrjj

@ManiRon
Hi
Super. so was just c+11 support.
The QT widgets cannot draw html Buttons so if you
view them in textEdit/Browser no buttons can be shown.

I know no easy way to have buttons, but you can try with
Qt WebEngine
instead and see if it likes it.
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ManiRon

wrote on last edited by ManiRon

#20

@mrjj as i have not worked on it any sample will be available for Qtwebengine which can be help full to understand it
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0