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<pre>
//It just can't format this correctly.
//My version is 7.1.3088.
//Is this a bug?
// A file download subsystem.
#include "stdafx.h"
#include <iostream>
#include <windows.h>
#include <wininet.h>
#include <fstream>
#include <cstdio>
using namespace std;
const int MAX_ERRMSG_SIZE = 80;
const int MAX_FILENAME_SIZE = 512;
const int BUF_SIZE = 1024;
// Exception class for download errors.
class DLExc {
char err[MAX_ERRMSG_SIZE];
public:
DLExc(char *exc) {
if(strlen(exc) < MAX_ERRMSG_SIZE)
strcpy(err, exc);
}
// Return a pointer to the error message.
const char * geterr() {
return err;
}
};
// A class for downloading files from the Internet.
class Download {
static bool ishttp(char *url);
static bool httpverOK(HINTERNET hIurl);
static bool getfname(char *url, char *fname);
static unsigned long openfile(char *url, bool reload,
ofstream &fout);
public:
static bool download(char *url, bool reload=false,
void (*update)(unsigned long, unsigned long)=NULL);
};
// Download a file.
//
// Pass the URL of the file to url.
//
// To reload a file, pass true to reload.
//
// To specify an update function that is called after
// each buffer is read, pass a pointer to that
// function as the third parameter. If no update
// function is desired, then let the third parameter
// default to null.
bool Download::download(char *url, bool reload,
void (*update)(unsigned long, unsigned long)) {
ofstream fout; // output stream
unsigned char buf[BUF_SIZE]; // input buffer
unsigned long numrcved; // number of bytes read
unsigned long filelen; // length of file on disk
HINTERNET hIurl=0, hInet=0; // Internet handles
unsigned long contentlen;// length of content
unsigned long len; // length of contentlen
unsigned long total = 0; // running total of bytes received
char header[80]; // holds Range header
try {
if(!ishttp(url))
throw DLExc("Must be HTTP url.");
// Open the file specified by url.
// The open stream will be returned
// in fout. If reload is true, then
// any preexisting file will be truncated.
// The length of any preexisting file (after
// possible truncation) is returned.
filelen = openfile(url, reload, fout);
// See if Internet connection available.
if(InternetAttemptConnect(0) != ERROR_SUCCESS)
throw DLExc("Can't connect.");
// Open Internet connection.
hInet = InternetOpen("downloader",
INTERNET_OPEN_TYPE_DIRECT,
NULL, NULL, 0);
if(hInet == NULL)
throw DLExc("Can't open connection.");
// Construct header requesting range of data.
sprintf(header, "Range:bytes=%d-", filelen);
// Open the URL and request range.
hIurl = InternetOpenUrl(hInet, url,
header, -1,
INTERNET_FLAG_NO_CACHE_WRITE, 0);
if(hIurl == NULL) throw DLExc("Can't open url.");
// Confirm that HTTP/1.1 or greater is supported.
if(!httpverOK(hIurl))
throw DLExc("HTTP/1.1 not supported.");
// Get content length.
len = sizeof contentlen;
if(!HttpQueryInfo(hIurl,
HTTP_QUERY_CONTENT_LENGTH |
HTTP_QUERY_FLAG_NUMBER,
&contentlen, &len, NULL))
throw DLExc("File or content length not found.");
// If existing file (if any) is not complete,
// then finish downloading.
if(filelen != contentlen && contentlen)
do {
// Read a buffer of info.
if(!InternetReadFile(hIurl, &buf,
BUF_SIZE, &numrcved))
throw DLExc("Error occurred during download.");
// Write buffer to disk.
fout.write((const char *) buf, numrcved);
if(!fout.good())
throw DLExc("Error writing file.");
total += numrcved; // update running total
// Call update function, if specified.
if(update && numrcved > 0)
update(contentlen, total+filelen);
} while(numrcved > 0);
else
if(update)
update(filelen, filelen);
} catch(DLExc) {
fout.close();
InternetCloseHandle(hIurl);
InternetCloseHandle(hInet);
throw; // rethrow the exception for use by caller
}
fout.close();
InternetCloseHandle(hIurl);
InternetCloseHandle(hInet);
return true;
}
// Return true if HTTP version of 1.1 or greater.
bool Download::httpverOK(HINTERNET hIurl) {
char str[80];
unsigned long len = 79;
// Get HTTP version.
if(!HttpQueryInfo(hIurl, HTTP_QUERY_VERSION, &str, &len, NULL))
return false;
// First, check major version number.
char *p = strchr(str, '/');
p++;
if(*p == '0') return false; // can't use HTTP 0.x
// Now, find start of minor HTTP version number.
p = strchr(str, '.');
p++;
// Convert to int.
int minorVerNum = atoi(p);
if(minorVerNum > 0) return true;
return false;
}
// Extract the filename from the URL. Return false if
// the filename cannot be found.
bool Download::getfname(char *url, char *fname) {
// Find last /.
char *p = strrchr(url, '/');
// Copy filename after the last /.
if(p && (strlen(p) < MAX_FILENAME_SIZE)) {
p++;
strcpy(fname, p);
return true;
}
else
return false;
}
// Open the output file, initialize the output
// stream, and return the file's length. If
// reload is true, first truncate any preexisting
// file.
unsigned long Download::openfile(char *url,
bool reload,
ofstream &fout) {
char fname[MAX_FILENAME_SIZE];
if(!getfname(url, fname))
throw DLExc("File name error.");
if(!reload)
fout.open(fname, ios::binary | ios::out |
ios::app | ios::ate);
else
fout.open(fname, ios::binary | ios::out |
ios::trunc);
if(!fout)
throw DLExc("Can't open output file.");
// Get current file length.
return fout.tellp();
}
// Confirm that the URL specifies HTTP.
bool Download::ishttp(char *url) {
char str[5] = "";
// Get first four characters from URL.
strncpy(str, url, 4);
// Convert to lowercase
for(char *p=str; *p; p++) *p = tolower(*p);
return !strcmp("http", str);
}
</pre>
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If you post source code, you need to place it inside <pre> ... </pre> tags. It also helps to check the "Do not treat <'s as HTML tags" box below the message window. This is especially true in your case, since you are asking a question related to source formatting.
Software Zen: delete this;
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Hi,
I have written an ActiveX Object (vc6) and now I wanted to add properties. in the testcontainer it works fine.
now i want to test it in internet explorer and there, i cant set the property anymore via teh <param /> tag, although my control is safe for scripting and initializing.
other question:
how can i intercept <embed "src="asdf.skl" /> within an colecontrol?
thanks in advance
thomas
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May I change tcp header fields or ip header fields, Please help me how I can do that?
For example i want to set syn field in tcp header 1 or 0.
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You can generate own ip packets using raw sockets.
Don't try it, just do it! 
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I am trying to run the following file as follows:
the file that I am trying to run takes a switch like this.
msinfo32.exe /nfo outfile.nfo
the line of code I used is;
system("c:\\Program files\\common files\\Microsoft shared\\MSInfo\\msinfo32.exe /nfo outfile.nfo");
compiles but does not runs, I tried to encluse command in double-quots like this
system("\"c:\\Program files\\common files\\Microsoft shared\\MSInfo\\msinfo32.exe /nfo outfile.nfo\"");
error :
'c:\program' not recognized as command...
any ideas?
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Try using ShellExecuteEx.
 Pssst. You see that little light on your monitor? That's actually a government installed spy camera. Smile and wave to big brother!
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Try this:
system("\"c:\\Program files\\common files\\Microsoft shared\\MSInfo\\msinfo32.exe\" /nfo outfile.nfo");
--------^------------------------------------------------------------------------^In a command line, where the program you're running is in a path with spaces, you need to surround the program with quotes.
Software Zen: delete this;
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Can anyone tell me how to create a link (Hyperlink) to a file from an MFC dialog box? So than when clicking on the link (static text) the file will open.
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Hi,
Here is what I am trying to do so far,
I am trying to parse my XML file using the XML parser object pXMLParser to accomplish the following tasks-
pXMLParser->ReplaceNodeVale("input\userinputkey", szUserInput);
pADOObject->GetNextPrompt(pXMLParser->Getxml(), szxml);
pXMLParser->Release();
pXMLParser->Loadxml(szxml);
pXMLParser->GetNodeValue("output\messageid", szNodeVale);
Basically what I am trying to do is, load the xml file, get a particular node value based on the tag value, replace the node value with user input value, parse the xml and then release it. I am using MSXML for this and my XML file looks somewhat like this-
<?xml version="1.0" encoding="utf-8" ?>
- <root>
- <input>
<nodeid>0</nodeid>
<parentid>0</parentid>
<userinputkey>9167791963</userinputkey>
</input>
- <output>
- <vrurequestscript>
- <datainput>
<mainmsgid>100</mainmsgid>
<correctvalues>1,2</correctvalues>
<charset>12</charset>
<length>1</length>
<timeout>10000</timeout>
<timeoutmsgid>200</timeoutmsgid>
<retrycount>3</retrycount>
<retryexitaction>end</retryexitaction>
<retryexitmsgid>300</retryexitmsgid>
</datainput>
- <confirminput>
<mainmsgid>101</mainmsgid>
<correctvalues>1,2</correctvalues>
<charset>12</charset>
<accept>1</accept>
<reject>2</reject>
<length>1</length>
<timeout>10000</timeout>
<timeoutmsgid>200</timeoutmsgid>
<retrycount>3</retrycount>
<retryexitaction>end</retryexitaction>
<retryexitmsgid>300</retryexitmsgid>
</confirminput>
</vrurequestscript>
<nodeid>0</nodeid>
<parentid>0</parentid>
</output>
</root>
If anyone can show me how to go about doing it or point it in the right direction I will really appreciate it.
Thank you
-Ray
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Dear friends,
I developed an ActiveX control using ATL and Visual C++ 7.0. One function exposed by the control takes too many arguments, around 15 in number. As scuh i want to pass structure instead of too many arguments.
But ATL is not giving me any option to add my structure as an argument ot the exposed function ? Please tell me what is the solution of this problem ?
Also i want to use my control by VB/JAvaScript etc. So what is the better way to solve this problem
Imtiaz
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Hi all,
I'm a newbie I'm using Visual C ++ 6 and DirectX SDK 8.1.
I'd like to know how and where modify the appwizard generated code to control the Frame containing the triangle or the teapot.
For example I'would like to load another .x file or add some buttons to change the viewpoint; I would like to add labels to show debugging info for example coords of the object in the space or other info.
I hope someone wants to help me
Bye
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pls help him  and me
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is it possible to change background color of an edit control (CRichEditCtrl or CEdit)?
OnCtlColor() doesn't work well.
thanks
includeh10
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includeh10 wrote:
OnCtlColor() doesn't work well.
Which indicates that you are not using it correctly. OnCtlColor() is the preferred method. Please provide a relevant code snippet.
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but after u type or copy some text on it, the background color of text area becomes white always.
includeh10
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Try adding:
pDC->SetBkMode(TRANSPARENT);
 Pssst. You see that little light on your monitor? That's actually a government installed spy camera. Smile and wave to big brother!
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What files will I need to include to use CString of WTL ?
Thank you.
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atlbase.h
atlapp.h
ATLmisc.h
"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
cheers,
Alok Gupta
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Could you answer me these questions ?
What files will I need to include to use WTL ?
What files will I need to include to use ATL ?
What files will I need to include to use STL ?
Thanks in advance.
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That depends on what you want to use in each. All of this information is in MSDN.
Tim Smith
I'm going to patent thought. I have yet to see any prior art.
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Could you answer me these questions ?
What classes does WTL support ?
What classes does ATL support ?
What classes does STL support ?
Thank you.
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For someone who's username is 'microsoftcertification', you ought to know that this information is available at msdn.microsoft.com[^].
Software Zen: delete this;
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Hello,
I am developping under Win2k with Visual studio 6.
I have created a dialog containing a month calendar (CMonthCalCtrl).
Everything goes well while I execute my appli on Win2k.
But, as soon as I run my application on WinXP, I get a problem with this calendar : it doesn't fit in the rectangle I defined (on win2k) for it on the dialog, around 15-20% of the right part is missing, so I am not able to click the days in the last column.
Worse : If I copy my whole project on a Visual studio 6 running on WinXP, the problem already appears when I look at the dialog editor, once again calendar is too large for defined rectangle and I am obliged to enlarge the rectangle.
Do you have an idea that explain this difference of behaviour between Win2k and winXP ??
Thanks in advance
DD
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