Click here to Skip to main content
11,413,548 members (72,437 online)
Click here to Skip to main content

WWW (HTTP/HTTPS/FTP) Client using WININET

, 3 May 2004 CPOL
Rate this:
Please Sign up or sign in to vote.
Synchronized/asynchronized WWW client: HTTP/HTTPS GET, POST, POST multiparts/form-data supported. FTP GET FILE, PUT FILE supported too.

Introduction

This class is used for HTTP/HTTPS request, and FTP request.

Supported methods are:

  • HTTP/HTTPS
    1. GET
    2. POST
    3. POST multiparts/form-data
  • FTP
    1. GET FILE
    2. PUT FILE

Class Overview

// synchronized www client
 class W3Client {
 public:
  enum w3t { w3ftp, w3http, w3https };
  enum w3m { reqGet, reqPost, reqPostMultipartsFormdata };
 public:
  W3Client(){ _hOpen=NULL; _hConnection=NULL, _hRequest=NULL; }
  virtual ~W3Client(){ InitializePostArguments(); InitializeCookies();}
 public:  
  // connection handling
  bool Connect(const char *szaddress,
         const char *szuser=NULL, const char *szpassword=NULL, 
      const char *szagent=__W3_DEFAULT_AGENT);
  virtual bool Connect(const char *szaddress, long nport,
           const char *szuser=NULL, const char *szpassword=NULL,
           w3t t=w3http, const char *szagent=__W3_DEFAULT_AGENT);
  const char *GetURI(){ return _szuri.c_str(); }
  void Close();

  // post argument handling
  void InitializePostArguments();
  void AddPostArgument(const char *szname, const int nvalue);
  void AddPostArgument(const char *szname, const long nvalue);
  void AddPostArgument(const char *szname, const float nvalue);
  void AddPostArgument(const char *szname, const double nvalue);
  void AddPostArgument(const char *szname, 
                      const char *szvalue, bool bfile=false);
  
  // cookie handling
  void InitializeCookies();
  void AddCookie(const char *szname, const double value);
  void AddCookie(const char *szname, const float value);
  void AddCookie(const char *szname, const long value);
  void AddCookie(const char *szname, const int value);  
  void AddCookie(const char *szname, const char *szvalue);
 
  // http/https request handling
  bool Request(const char *szuri, w3m m=reqGet, const char *szref=NULL);
  unsigned long Response(unsigned char *buf, unsigned long len);
  unsigned int QueryResult();
  const char * QueryContentType();
  unsigned long QueryContentLength();
  unsigned long QueryCookie(unsigned char *buf, 
          unsigned long len, unsigned long idx=0);
  unsigned long QueryRawHeader(unsigned char *buf, unsigned long len);
 
  // ftp handling
  bool PutFile(const char *szuri, const char *szfile, bool ascii=false);
  bool GetFile(const char *szuri, const char *szfile, bool ascii=false);
  unsigned long PutFile(const char *szuri, unsigned char *buf, 
                        unsigned long len, bool ascii=false);
  unsigned long GetFile(const char *szuri, unsigned char *buf, 
                        unsigned long len, bool ascii=false);

 ...
 };

 // Asynchronized www client
 class AsyncW3Client : public W3Client {
 ...
 public:
  bool Connect(const char *szaddress,
            INTERNET_STATUS_CALLBACK lpfn,
            const char *szuser=NULL,
            const char *szpassword=NULL,
            const char *szagent=__W3_DEFAULT_AGENT);
  bool Connect(const char *szaddress, long nport,
          INTERNET_STATUS_CALLBACK lpfn,
          const char *szuser=NULL, const char *szpassword=NULL,
          w3t t=w3http, const char *szagent=__W3_DEFAULT_AGENT);
  bool Request(const char *szuri, w3m m=reqGet, const char *szref=NULL){
       _hCompleteRequestEvent=::CreateEvent(NULL, FALSE, FALSE, NULL);
       return W3Client::Request(szuri, m, szref);
  }
  unsigned long Response(unsigned char *buf, unsigned long len){
   ::CloseHandle(_hCompleteRequestEvent);
   _hCompleteRequestEvent=NULL;
   return W3Client::Response(buf, len);
  }
 public:
  void SetCompleteRequest();
  bool WaitCompleteRequest(unsigned long ntime=INFINITE);
 ...
 };
  1. Synchronized W3Client

    • Connect(...) method connects to HTTP server.
    • Close() method closes connection. These are used with RequestOfURI(...).
    • InitializePostArguments() method initializes POST arguments.
    • AddPostArgument(...) method is supported so that you can add new POST arguments of the following types: string, int, long, float, double, file.
    • Request(...) method is for you to attempt request for HTTP Request (GET, POST, POST-MULTIPARTFORMDATA) with URL. HTTP METHOD indirector has 3 types.
    • InitializeCookies() method initializes cookie values.
    • AddCookie(...) method adds cookie vars.
      • W3Client::reqGet is HTTP GET Request.
      • W3Cient::reqPost is HTTP POST Request.
      • W3Client::reqPostMultiPartsFormData is HTTP POST Request with BINARY FORM DATA.
    • Response(...) method is that you have HTTP Response by bytes.
    • QueryResult() method is you have receive HTTP Request result value.
  2. Asynchronized W3Client

    • SetCompleteRequest() method commits complete Request to AsyncW3Client.
    • WaitCompleteRequest() method waits for Request to be completed.

Usage

  1. Synchronized HTTP GET

    #include <iostream>
    #include "w3c.h"
    
    using namespace std;
    
    int main(int argc, char *argv[]){
      
      W3Client w3;
     
      if(w3.Connect("http://google.com/")){
       if(w3.Request("/")){
        char buf[1024]="\0";
        while(w3.Response(reinterpret_cast<unsigned char *>(buf), 1024))
         cout << buf ;
      }
       w3.Close();
      }
      return 0;
    }
  2. Synchronized HTTP POST multiparts/form-data

    int main(int argc, char *argv[]){
     
     W3Client client;
    
     if(client.Connect("http://gooshin.zzem.net/")){
      client.AddPostArgument("f[]", "d:\\log1.txt", true);
      client.AddPostArgument("f[]", "d:\\log2.txt", true);
      client.AddPostArgument("f[]", "d:\\log3.txt", true);
      if(client.Request("/test.php", W3Client::reqPostMultipartsFormdata)){
       char buf[1024]="\0";
       while(client.Response(reinterpret_cast<unsigned char*>(buf), 1024)>0){
        cout << buf << endl;
        memset(buf, 0x00, 1024);
       }
      }
      client.Close();
     }
    
     return 0;
    }
  3. Asynchronized HTTP client

    #include <iostream>
    #include <net/w3c.h>
    #include <wt.h>
    #include <windows.h>
    
    using namespace std;
    
    CRITICAL_SECTION __cs;
    
    class AsDown : public AsyncW3Client, public IWORKERTHREAD {
    public:
     AsDown(unsigned int idx):AsyncW3Client(), IWORKERTHREAD(idx){}
     virtual ~AsDown(){}
    private:
     virtual void OnWork(){
      while(true){
       WaitCompleteRequest();
       unsigned char buf[1024]="\0";
       while(Response(buf, 1024)){
         ::EnterCriticalSection(&__cs);
         cout << reinterpret_cast<char*>(buf);
         ::LeaveCriticalSection(&__cs);
         memset(buf, 0x00, 1024);
       }
       ::Sleep(500);
      }
     }
    };
    void CALLBACK __getstatus(  HINTERNET hInternet,
                   DWORD_PTR dwContext,
                   DWORD dwInternetStatus,
                   LPVOID lpvStatusInformation,
                   DWORD dwStatusInformationLength
                   ){
     AsyncW3Client *pcontext=reinterpret_cast<AsyncW3Client*>(dwContext);
     
     unsigned long nbytes=0;
      ::EnterCriticalSection(&__cs);
      switch(dwInternetStatus){
     case INTERNET_STATUS_SENDING_REQUEST:
      cout << "request sending..." << endl;
      break;
     case INTERNET_STATUS_REQUEST_SENT:
      {
       unsigned long *pnsent=(unsigned long*)lpvStatusInformation;
       cout << "bytes sent: " << *pnsent << endl;
       nbytes+=*pnsent;
       cout << "request sent..." << endl;
      }
      break;
     case INTERNET_STATUS_REQUEST_COMPLETE:
      {
       INTERNET_ASYNC_RESULT *pAsyncRes = 
              (INTERNET_ASYNC_RESULT *)lpvStatusInformation;
       cout << "Function call finished" << endl;
       cout << "dwResult: " << pAsyncRes->dwResult << endl;
       cout << "dwError:  " << pAsyncRes->dwError << endl;
       cout.flush();
       pcontext->SetCompleteRequest();
        cout << "request complete..." << endl;  
      }
      break;
      }
      ::LeaveCriticalSection(&__cs);
     
      return;
    }
    int main(int argc, char *argv[]){ 
     ::InitializeCriticalSection(&__cs);
     AsDown client(3);
     if(client.Connect("http://gooshin.zzem.net/", __getstatus)){
      __wtstart(client);
      client.Request("/test.php");
      Sleep(5000);
      client.InitializePostArguments();
      client.AddPostArgument("f[]", "d:\\log1.txt", true);
      client.AddPostArgument("f[]", "d:\\log2.txt", true);
      client.AddPostArgument("f[]", "d:\\log3.txt", true);
      client.Request("/test.php", AsDown::reqPostMultipartsFormdata);
      Sleep(5000);
      client.InitializePostArguments();
      client.AddPostArgument("f", "sss");
      client.Request("/test2.php", AsDown::reqPost);  
      Sleep(5000);
      
      __wtwait(client);
      client.Close();
     }
     ::DeleteCriticalSection(&__cs);
     return 0;
    }

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Share

About the Author

Heo Yongseon
Software Developer
Korea (Republic Of) Korea (Republic Of)
Poke tongue | ;-P

Comments and Discussions

 
QuestionIf you want to get the webpages zipped, then replace W3Client::RequestGet with the following Pin
Eric Schwerzel at 26-Jun-14 14:25
memberEric Schwerzel26-Jun-14 14:25 
GeneralWorked fine with getting HTTPS pages Pin
Eric Schwerzel at 11-Jun-14 20:45
memberEric Schwerzel11-Jun-14 20:45 
GeneralNot able to run the sample!! Pin
gu@z at 12-Nov-08 16:41
membergu@z12-Nov-08 16:41 
QuestionAbout license Pin
PrasVM at 16-Oct-08 1:07
memberPrasVM16-Oct-08 1:07 
AnswerRe: About license Pin
Yongseon Heo at 16-Oct-08 2:25
memberYongseon Heo16-Oct-08 2:25 
GeneralSmall bug with cookies Pin
oren.shnitzer at 24-Aug-08 1:17
memberoren.shnitzer24-Aug-08 1:17 
GeneralA question about AsyncW3Client Pin
Protocol_yatsu at 23-Feb-08 7:49
memberProtocol_yatsu23-Feb-08 7:49 
QuestionHow to manage a Timeout? Pin
cact at 26-Sep-07 1:39
membercact26-Sep-07 1:39 
GeneralYour Post Method Fails!!! Pin
Bill SerGio, The Infomercial King at 29-Jan-07 12:31
memberBill SerGio, The Infomercial King29-Jan-07 12:31 
GeneralRe: Your Post Method Fails!!! Pin
Steve Thresher at 30-Apr-12 5:55
memberSteve Thresher30-Apr-12 5:55 
Questionquestion about std:string? Pin
typg at 30-Aug-06 18:08
membertypg30-Aug-06 18:08 
GeneralPOST via SSL does not work for me Pin
koehler at 12-Jul-06 13:32
memberkoehler12-Jul-06 13:32 
Generalif(_hOpen || _hOpen!=INVALID_HANDLE_VALUE) Pin
cp663311 at 11-Jul-06 0:40
membercp66331111-Jul-06 0:40 
GeneralBug with ::HttpOpenRequest in your class [modified] Pin
sbytov at 29-Jun-06 0:50
membersbytov29-Jun-06 0:50 
GeneralRe: Bug with ::HttpOpenRequest in your class Pin
Goatboy160 at 28-Aug-06 11:11
memberGoatboy16028-Aug-06 11:11 
GeneralRe: Bug with ::HttpOpenRequest in your class Pin
praveen79 at 21-Nov-08 0:35
memberpraveen7921-Nov-08 0:35 
Generalhere,how to login out yahoo email Pin
shellhy at 26-Jun-06 1:23
membershellhy26-Jun-06 1:23 
QuestionIWORKERTHREAD [modified] Pin
daman371 at 20-Jun-06 8:37
memberdaman37120-Jun-06 8:37 
I keep getting that IWORKERTHREAD is an undefined identifier and it can't find wt.h in VC6 and VC7. Any ideas?

-- modified at 13:37 Tuesday 20th June, 2006
AnswerRe: IWORKERTHREAD Pin
daman371 at 22-Jun-06 9:31
memberdaman37122-Jun-06 9:31 
General222 Pin
shellhy at 13-Jun-06 2:07
membershellhy13-Jun-06 2:07 
QuestionDialog and String Table all in KOREAN, How do I convert to English ? Pin
cfilorux at 3-May-06 13:46
membercfilorux3-May-06 13:46 
GeneralSessions Pin
eusto at 19-Apr-06 3:15
membereusto19-Apr-06 3:15 
GeneralRe: Sessions Pin
Yongseon Heo at 19-Apr-06 16:31
memberYongseon Heo19-Apr-06 16:31 
GeneralDownload file Pin
meouvn at 9-Mar-06 17:04
membermeouvn9-Mar-06 17:04 
GeneralRe: Download file Pin
_aleksei at 31-Dec-06 4:13
member_aleksei31-Dec-06 4:13 
QuestionPost xml data Pin
tino55 at 16-Feb-06 23:50
membertino5516-Feb-06 23:50 
QuestionSmall bug? or my mistake? Pin
Yails at 5-Dec-05 6:05
memberYails5-Dec-05 6:05 
AnswerRe: Small bug? or my mistake? Pin
Yongseon Heo at 19-Dec-05 18:09
memberYongseon Heo19-Dec-05 18:09 
Generalurl encoding Pin
gkutiel at 22-Oct-05 8:43
membergkutiel22-Oct-05 8:43 
GeneralRe: url encoding Pin
Yongseon Heo at 19-Dec-05 18:08
memberYongseon Heo19-Dec-05 18:08 
GeneralProgress in uploading file Pin
Akbaraka at 10-Aug-05 5:46
memberAkbaraka10-Aug-05 5:46 
GeneralRe: Progress in uploading file Pin
Yongseon Heo at 10-Aug-05 17:09
memberYongseon Heo10-Aug-05 17:09 
GeneralRe: Progress in uploading file Pin
marlongrech at 30-Oct-06 6:53
membermarlongrech30-Oct-06 6:53 
GeneralRe: Progress in uploading file Pin
marlongrech at 31-Oct-06 1:06
membermarlongrech31-Oct-06 1:06 
QuestionRe: Progress in uploading file Pin
Angel Kafazov at 7-Jan-09 5:42
memberAngel Kafazov7-Jan-09 5:42 
GeneralCrash / Fix when the connection internet is offline and bug in the return of the function Connect(...). Pin
alanlive at 30-Jun-05 22:38
memberalanlive30-Jun-05 22:38 
GeneralBug in AsyncW3Client Pin
Dean Hallman at 24-Jun-05 15:30
memberDean Hallman24-Jun-05 15:30 
GeneralHTTPS Not Working Pin
neverneverland at 15-Jun-05 7:26
sussneverneverland15-Jun-05 7:26 
GeneralRe: HTTPS Not Working Pin
TomazZ at 28-Jul-05 4:49
memberTomazZ28-Jul-05 4:49 
GeneralRe: HTTPS Not Working Pin
TomazZ at 28-Jul-05 4:54
memberTomazZ28-Jul-05 4:54 
GeneralRe: HTTPS Not Working Pin
dungbkhn at 22-Aug-05 19:16
memberdungbkhn22-Aug-05 19:16 
GeneralRe: HTTPS Not Working Pin
TomazZ at 5-Dec-05 3:08
memberTomazZ5-Dec-05 3:08 
GeneralRe: HTTPS Not Working Pin
szuzso at 14-Dec-05 3:40
memberszuzso14-Dec-05 3:40 
GeneralRe: HTTPS Not Working Pin
meouvn at 8-Mar-06 21:13
membermeouvn8-Mar-06 21:13 
GeneralRe: HTTPS Not Working Pin
meouvn at 9-Mar-06 17:08
membermeouvn9-Mar-06 17:08 
GeneralRe: HTTPS Not Working Pin
zhirenze at 9-Dec-06 4:47
memberzhirenze9-Dec-06 4:47 
GeneralUnicode Version Pin
SnowshoeMJ at 20-May-05 10:42
memberSnowshoeMJ20-May-05 10:42 
GeneralRe: Unicode Version Pin
Yongseon Heo at 24-May-05 15:09
memberYongseon Heo24-May-05 15:09 
GeneralRe: Unicode Version [modified] Pin
HongJin Kim at 13-Jun-06 17:52
memberHongJin Kim13-Jun-06 17:52 
GeneralCan't complie on VS.NET 2003 Pin
moshem at 10-May-05 7:55
membermoshem10-May-05 7:55 

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.

| Advertise | Privacy | Terms of Use | Mobile
Web04 | 2.8.150427.1 | Last Updated 4 May 2004
Article Copyright 2004 by Heo Yongseon
Everything else Copyright © CodeProject, 1999-2015
Layout: fixed | fluid