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WWW (HTTP/HTTPS/FTP) Client using WININET

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3 May 2004 2  
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;
    }

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