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CSplitURL - split a URL into component parts

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4.17 (9 votes)
10 Nov 2002
Wrapper class for the WinInet InternetCrackUrl function

Sample Image - SplitURL.jpg


Recently I needed some code that would split a URL into component parts (scheme, host, folder, etc.) and I came across a WinInet function called InternetCrackUrl which does the job. The function itself is fairly straighforward, but I thought the demo supplied on the MSDN might be a tad confusing for new users - so I have created CSplitURL to wrap the call.

This class is not going to win any prizes, but it is very easy to use - first include the header:

#include "url.h"

Then, to use the class, simply declare a CSplitURL object, passing the URL to split, e.g.:

CSplitURL url(_T(""));

Once you have created a CSplitURL, you can access the various URL components using the following methods:

  • GetScheme
  • GetPort
  • GetSchemeName
  • GetHostName
  • GetUserName
  • GetPassword
  • GetURLPath
  • GetExtraInfo

All pretty self-explanatory. Note that using this class in your application will create a dependency on WININET.DLL, which hopefully won't be a problem. Note also that this class can be used with any framework that includes a CString class - including MFC, WTL and ATL7.


// Implementation of the CURLComponents and CSplitURL classes.

#pragma once
#pragma comment(lib, "wininet.lib")

#include "wininet.h"

// Class to wrap the Win32 URL_COMPONENTS structure
class CURLComponents : public URL_COMPONENTS
        memset(this, 0, sizeof(URL_COMPONENTS));
        dwStructSize = sizeof(URL_COMPONENTS);

// Class used to split a URL into component parts.
// Note: Uses WININET InternetCrackUrl function.
class CSplitURL
    CString m_strScheme;
    INTERNET_SCHEME m_nScheme;
    CString m_strHostName;
    INTERNET_PORT m_nPort;
    CString m_strUserName;
    CString m_strPassword;
    CString m_strURLPath;
    CString m_strExtraInfo;
        : m_nScheme(INTERNET_SCHEME_DEFAULT)
        , m_nPort(0)
    CSplitURL(LPCTSTR lpsz)
        : m_nScheme(INTERNET_SCHEME_DEFAULT)
        , m_nPort(0)


    // Split a URL into component parts
    bool Split(LPCTSTR lpsz)
        // Be defensive
        ATLASSERT(lpsz != NULL && *lpsz != '\0');
        // Get the URL length
        DWORD dwLength = _tcslen(lpsz);

        CURLComponents url;        
        // Fill structure
        url.lpszScheme = m_strScheme.GetBuffer(dwLength);
        url.dwSchemeLength = dwLength;
        url.lpszHostName = m_strHostName.GetBuffer(dwLength);
        url.dwHostNameLength = dwLength;
        url.lpszUserName = m_strUserName.GetBuffer(dwLength);
        url.dwUserNameLength = dwLength;
        url.lpszPassword = m_strPassword.GetBuffer(dwLength);
        url.dwPasswordLength = dwLength;
        url.lpszUrlPath = m_strURLPath.GetBuffer(dwLength);
        url.dwUrlPathLength = dwLength;
        url.lpszExtraInfo = m_strExtraInfo.GetBuffer(dwLength);
        url.dwExtraInfoLength = dwLength;
        // Split
        bool bRet = InternetCrackUrl(lpsz, 0, 0, &url) != FALSE;
        // Release buffers
        // Get the scheme/port
        m_nScheme = url.nScheme;
        m_nPort = url.nPort;
        // Done
        return bRet;

    // Get the scheme number
    inline INTERNET_SCHEME GetScheme(void) const { return m_nScheme; }
    // Get the port number
    inline INTERNET_PORT GetPort(void) const { return m_nPort; }
    // Get the scheme name
    inline LPCTSTR GetSchemeName(void) const { return m_strScheme; }
    // Get the host name
    inline LPCTSTR GetHostName(void) const { return m_strHostName; }
    // Get the user name
    inline LPCTSTR GetUserName(void) const { return m_strUserName; }
    // Get the password
    inline LPCTSTR GetPassword(void) const { return m_strPassword; }
    // Get the URL path
    inline LPCTSTR GetURLPath(void) const { return m_strURLPath; }
    // Get the extra info
    inline LPCTSTR GetExtraInfo(void) const { return m_strExtraInfo; }


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Comments and Discussions

GeneralGreat class Pin
Lekrot10-Aug-06 13:57
memberLekrot10-Aug-06 13:57 
GeneralRe: Great class Pin
Rob Caldecott10-Aug-06 22:32
memberRob Caldecott10-Aug-06 22:32 
GeneralGreat Article Pin
ThatsAlok22-Sep-04 19:55
memberThatsAlok22-Sep-04 19:55 
GeneralRe: Great Article Pin
Rob Caldecott22-Sep-04 20:38
memberRob Caldecott22-Sep-04 20:38 
GeneralCUrl in ATL 7.0 atlutil.h Pin
NormDroid12-Nov-02 9:52
professionalNormDroid12-Nov-02 9:52 
GeneralRe: CUrl in ATL 7.0 atlutil.h Pin
Rob Caldecott12-Nov-02 21:56
memberRob Caldecott12-Nov-02 21:56 
GeneralRe: CUrl in ATL 7.0 atlutil.h Pin
Bjornar Henden30-Nov-02 6:03
memberBjornar Henden30-Nov-02 6:03 
GeneralExtra feature request Pin
Chris Hambleton12-Nov-02 6:27
memberChris Hambleton12-Nov-02 6:27 
GeneralRe: Extra feature request Pin
Rob Caldecott12-Nov-02 6:38
memberRob Caldecott12-Nov-02 6:38 
GeneralRe: Extra feature request Pin
Houdini13-Nov-02 5:50
memberHoudini13-Nov-02 5:50 
GeneralAmazing Pin
Adrian Edmonds11-Nov-02 18:37
memberAdrian Edmonds11-Nov-02 18:37 
GeneralRe: Amazing Pin
Anonymous11-Nov-02 18:44
memberAnonymous11-Nov-02 18:44 
GeneralRe: Amazing Pin
Adrian Edmonds11-Nov-02 19:36
memberAdrian Edmonds11-Nov-02 19:36 
GeneralRe: Amazing Pin
Anonymous11-Nov-02 20:16
memberAnonymous11-Nov-02 20:16 
GeneralRe: Amazing Pin
Rob Caldecott11-Nov-02 22:01
memberRob Caldecott11-Nov-02 22:01 
GeneralGreat Pin
srk11-Nov-02 15:33
membersrk11-Nov-02 15:33 
GeneralCool Pin
Uwe Keim11-Nov-02 6:13
sitebuilderUwe Keim11-Nov-02 6:13 
GeneralRe: Cool Pin
Rob Caldecott11-Nov-02 6:16
memberRob Caldecott11-Nov-02 6:16 
QuestionAfxParseUrl? Pin
twask11-Nov-02 3:54
membertwask11-Nov-02 3:54 
AnswerRe: AfxParseUrl? Pin
Rob Caldecott11-Nov-02 4:04
memberRob Caldecott11-Nov-02 4:04 
GeneralRe: AfxParseUrl? Pin
twask11-Nov-02 4:05
membertwask11-Nov-02 4:05 
Joke Pin 15:21
suss 15:21 

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Posted 10 Nov 2002


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