If you are using the main C++ distribution of wxWidgets, Feel free to ask any question related to wxWidgets development here. This means questions regarding to C++ and wxWidgets, not compile problems.
whoops
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by whoops Tue Aug 11, 2015 11:04 am
http://www.w3.org/1999/xhtml/
doublemax
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Posts: 19159 Joined: Fri Apr 21, 2006 8:03 pmLocation: $FCE2
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by doublemax Tue Aug 11, 2015 12:27 pm
Here's some old code that reads a web page and saves it to a local file. That should contain everything you need.
viewtopic.php?p=42101#p42101
Beware that the wxWIdgets http classes don't support HTTP redirect, if a website uses that you'll get an empty file.
Use the source, Luke!
whoops
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by whoops Tue Aug 11, 2015 1:56 pm
Code: Select all
#include <wx/wx.h>
#include <wx/url.h>
#define BUFSIZE 16384
int main(void)
{
wxURL url(wxT("http://www.w3.org/1999/xhtml"));
if(url.IsOk()) {
// in_stream threw a runtime exception :-(
wxInputStream *in_stream = url.GetInputStream();
unsigned char buffer[BUFSIZE];
do {
in_stream->Read(buffer, BUFSIZE);
} while (!in_stream->Eof());
delete in_stream;
wxString src;
src.Printf(wxT("%s"), buffer);
}
return 0;
}
how to deal with it [the comment in line 8] ?
I'm using wxWidgets 2.8.12
[/size]
Things being equal, the simplest explanation tends to be the right.
[ Windows 7 Ultimate x64 | wxWidgets 3.0.2 | Microsoft Visual C++ 2010 Express ]
doublemax
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Posts: 19159 Joined: Fri Apr 21, 2006 8:03 pmLocation: $FCE2
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by doublemax Tue Aug 11, 2015 2:33 pm
If you use wxWidgets from main() you need to initialize it manually. And you need to check the returned pointer from GetInputStream() for NULL.
Code: Select all
#include <wx/wx.h>
#include <wx/url.h>
#define BUFSIZE 16384
int main(void)
{
wxInitializer wx;
if( !wx.IsOk() )
return -1;
wxURL url(wxT("http://www.w3.org/1999/xhtml"));
if(url.IsOk())
{
wxInputStream *in_stream = url.GetInputStream();
// in_stream can be NULL if something went wrong
if( in_stream!=NULL )
{
// this code is wrong when the page is bigger than BUFSIZE
unsigned char buffer[BUFSIZE];
do {
in_stream->Read(buffer, BUFSIZE);
} while (!in_stream->Eof());
delete in_stream;
}
wxString src;
src.Printf(wxT("%s"), buffer);
}
return 0;
}
Use the source, Luke!
whoops
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Posts: 23 Joined: Sat Jun 27, 2015 5:53 amLocation: China
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by whoops Wed Aug 12, 2015 2:06 am
do there have alternative ways to deal with the status "301 Moved Permanently" (redirect) ?
Things being equal, the simplest explanation tends to be the right.
[ Windows 7 Ultimate x64 | wxWidgets 3.0.2 | Microsoft Visual C++ 2010 Express ]
doublemax
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Posts: 19159 Joined: Fri Apr 21, 2006 8:03 pmLocation: $FCE2
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by doublemax Wed Aug 12, 2015 8:17 am
Use the source, Luke!
whoops
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Posts: 23 Joined: Sat Jun 27, 2015 5:53 amLocation: China
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by whoops Wed Aug 12, 2015 9:22 am
thanks so much Things being equal, the simplest explanation tends to be the right.
[ Windows 7 Ultimate x64 | wxWidgets 3.0.2 | Microsoft Visual C++ 2010 Express ]
