Get HTML From A WebPage - Example Program

[Trad]

Ok this is here for people to learn from, you will have to paste this link into your browser to download the program

(if you click it, you will probably get redirected by brinkster, so copy and paste it)

"http://www23.brinkster.com/tradsworld/html.zip"

here is the source


#include <windows.h>
#include <urlmon.h>
#include <fstream.h>
#pragma comment(lib, "urlmon.lib")

#define IDC_MAINEDIT     100
#define IDC_MAINBUTTON   101
#define IDC_MAINEDITLINK 102
#define IDC_COPY         103

HFONT hFontComicSans = CreateFont(15,0,0,0,400,0,0,0,DEFAULT_CHARSET,OUT_CHARACTER_PRECIS,CLIP_DEFAULT_PRECIS,ANTIALIASED_QUALITY,FF_DONTCARE,"Comic Sans MS");
HFONT hFontArial = CreateFont(15,0,0,0,400,0,0,0,DEFAULT_CHARSET,OUT_CHARACTER_PRECIS,CLIP_DEFAULT_PRECIS,ANTIALIASED_QUALITY,FF_DONTCARE,"Arial");

HWND hWndEditLink;
HWND hWndEdit;
HWND hWndCopyButton;
ifstream tempdownloadfile;
char szURL[900];
char szFile[MAX_PATH];
char buffer[1000];

void AppendToEditBox(HWND hWndEdit, char *szText)
{
int nTextLength = (int)SendMessage(hWndEdit, WM_GETTEXTLENGTH, 0, 0);
SendMessage(hWndEdit, EM_SETSEL, nTextLength, nTextLength);
SendMessage(hWndEdit, EM_REPLACESEL, false, (LPARAM)szText);
}


LRESULT CALLBACK WndProc(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam)
{
switch (Msg)
{
case WM_CREATE[img]http://proboards8.com/boardimages/sad.gif[/img]br] {.
HINSTANCE hInstance = GetModuleHandle(NULL);
hWndEdit = CreateWindowEx(0,"Edit","",WS_CHILD | WS_VISIBLE | ES_MULTILINE | WS_VSCROLL | WS_HSCROLL,10,50,470,260,hWnd,(HMENU)IDC_MAINEDIT,hInstance,NULL);
hWndEditLink = CreateWindowEx(0,"EDIT","Enter Link And Press 'Get HTML'",WS_CHILD | WS_VISIBLE,20,15,370,20,hWnd,(HMENU)IDC_MAINEDITLINK,hInstance,NULL);
HWND hWndButton = CreateWindowEx(0,"BUTTON","Get HTML",WS_CHILD | WS_VISIBLE,400,10,75,30,hWnd,(HMENU)IDC_MAINBUTTON,hInstance,NULL);
hWndCopyButton = CreateWindowEx(0,"BUTTON","Copy",WS_CHILD | WS_VISIBLE,200,315,50,25,hWnd,(HMENU)IDC_COPY,hInstance,NULL);
SendMessage(hWndButton,WM_SETFONT,(WPARAM)hFontComicSans,(LPARAM)true);
SendMessage(hWndEditLink,WM_SETFONT,(WPARAM)hFontComicSans,(LPARAM)true);
SendMessage(hWndCopyButton,WM_SETFONT,(WPARAM)hFontComicSans,(LPARAM)true);
EnableWindow(GetDlgItem(hWnd, IDC_COPY), FALSE);
SendMessage(hWndEdit,WM_SETFONT,(WPARAM)hFontArial,(LPARAM)true);
SendMessage(hWndEditLink,EM_SETSEL,0,-1);
SetFocus(hWndEditLink);

return 0;
}
case WM_COMMAND[img]http://proboards8.com/boardimages/sad.gif[/img]br] {
switch (LOWORD(wParam)) {
case IDC_MAINBUTTON[img]http://proboards8.com/boardimages/sad.gif[/img]br] SetWindowText(hWndEdit,"");
EnableWindow(GetDlgItem(hWnd, IDC_COPY), FALSE);
lstrcpy(szFile,"tempurldownload.txt");
SendMessage(hWndEditLink,WM_GETTEXT,(WPARAM)100,(LPARAM)szURL);
if (URLDownloadToFile(0,szURL,szFile,0,NULL) == S_OK) {
tempdownloadfile.open("tempurldownload.txt");
if (tempdownloadfile.is_open()) {
while (!tempdownloadfile.eof()) {
tempdownloadfile >> buffer;
AppendToEditBox(hWndEdit,buffer);
}
}
}
tempdownloadfile.close();
EnableWindow(GetDlgItem(hWnd, IDC_COPY), TRUE);
break;
case IDC_COPY[img]http://proboards8.com/boardimages/sad.gif[/img]br] int length = SendMessage(hWndEdit,WM_GETTEXTLENGTH,0,0);
SendMessage(hWndEdit,EM_SETSEL,0,length);
SendMessage(hWndEdit,WM_COPY,0,0);
}
return 0;
}
case WM_CLOSE[img]http://proboards8.com/boardimages/sad.gif[/img]br] {
DestroyWindow(hWnd);
return 0;
}
case WM_DESTROY[img]http://proboards8.com/boardimages/sad.gif[/img]br] {
PostQuitMessage(0);
return 0;
}
default[img]http://proboards8.com/boardimages/sad.gif[/img]br] return DefWindowProc(hWnd, Msg, wParam, lParam); // Use the default message handler
}
}

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd)
{
WNDCLASs** WndClass**;
WndClass**.cbSize = sizeof(WndClass**);
WndClass**.cbCls**tra = 0; // No extra storage
WndClass**.cbWndExtra = 0; // No extra storage
WndClass**.hbrBackground = (HBRUSH)COLOR_BTNSHADOW; // Background
WndClass**.hCursor = LoadCursor(NULL, IDC_CROSS); // Default arrow cursor
WndClass**.hIcon = LoadIcon(NULL, IDI_APPLICATION); // Default app icon
WndClass**.hIconSm = LoadIcon(NULL, IDI_APPLICATION); // Default app icon
WndClass**.hInstance = hInstance; // Application instance
WndClass**.lpfnWndProc = WndProc; // Message Procedure
WndClass**.lpszClassName = "Window Class"; // Class name
WndClass**.lpszMenuName = NULL; // No menu
WndClass**.style = CS_VREDRAW | CS_HREDRAW | CS_OWNDC; // Class styles

if (!RegisterClass**(&WndClass**))
{
MessageBox(NULL, "Unable to register window class.", "Error", MB_ICONERROR);
return 0;
}
HWND hWnd = CreateWindowEx(NULL, "Window Class", "Get HTML", WS_VISIBLE | WS_OVERLAPPEDWINDOW, 200, 200, 500, 380, NULL, NULL, hInstance, NULL);
if (hWnd == NULL)
{
MessageBox(NULL, "Unable to create window.", "Error", MB_ICONERROR);
return 0;
}
MSG Msg;
while (GetMessage(&Msg, NULL, 0, 0) > 0)
{
TranslateMessage(&Msg);
DispatchMessage(&Msg);
}

return 0;
}


Any questions... ask here.

[Trad]

Allright, it should say WND+CLASS+EX

but the S+EX has been ***'d out.

So where you see

WNDCLASs** WndClass**;
WndClass**.cbSize = sizeof(WndClass**);

etc, its actually

WNDCLASs+ex WndClass+ex;
WndClass+ex.cbSize = sizeof(WndClass+ex);

just remove the +

[z00ey]

lmao censoring.. ;D

..anyway, works like a charm

[Trad]

thank you! z00ey are you on xp?

[z00ey]

..not only but yes, tested on xp-home (other puter lies down in pieces, lol)

[Ro0t]

Does C++ work alot with API's ?
Because it looks like you call the browser with a API call

[Trad]

yes, besides Console (MS-DOS style programs) all C++ is, is Win32, which is Windows API.

so the answer is, yes.

[Trad]

and i dont know what you mean by an API call, cos you dont "call" an interface.

there is no browser involved, the function is URLDownloadToFile() and that simple writes the html to a file.

and then i display the contents of the file into the editbox.

[z00ey]

hmm.. ..you made/compiled with MFC++ ?
(i can t compile with raw c++)

[Ro0t]

I write my code using Dev-C++ (Nice program btw, freeware )

And API Calls (Like i call it) is something in Vb to use a API inside your program
Like SendMessage

If you compare VB and C/C++ on filling up a form it's quite a difference

(Don't watch my English it sucks )

[Trad]

i dont use MFC.

and, what do you mean by raw c++ ?

i dont think there is a unraw c++? i dont know what you mean.

[Trad]

oh i see what you mean Root, a command that calls a control on your program, yeah SendMessage() GetWindowText() SetWindowText() GetDlgItem(), all API calls.

when you use Win32 programs, you seem to use API calls more than anything because you constantly need to change and update and read stuff that has been input.

[Ro0t]

My learning book is all C, and all stupid counting with numbers
PI, counting numbers and more of that.

Asking a number and using certain things is more fun
Tell me what does cout do ?

[z00ey]

Trad said:

i dont use MFC.

and, what do you mean by raw c++ ?

i dont think there is a unraw c++? i dont know what you mean.

borland c++ 5.5 , command-line tools.

[z00ey]

Ro0t said:

My learning book is all C, and all stupid counting with numbers
PI, counting numbers and more of that.

Asking a number and using certain things is more fun
Tell me what does cout do ?

cout is for output in c++.. ..but it is not supported in c.