Subversion Repositories Kolibri OS

//===================================================//

//                                                   //

//                       HTTP                        //

//                                                   //

//===================================================//

struct _http

{

    dword url;

    dword transfer;

    dword content_length;

    dword content_received;

    dword status_code;

    dword receive_result;

    dword content_pointer;

    char redirect_url[4096*3];

    char finaladress[4096*3];

    dword get();

    void free();

    void receive();

    bool handle_redirect();

};

dword _http::get(dword _url)

{

    url = _url;

    http_get stdcall (url, 0, 0, #accept_language);

    transfer = EAX;

    return transfer;

}

void _http::free()

{

    http_free stdcall (transfer);

    transfer=0;

}

void _http::receive()

{

    http_receive stdcall (transfer);

    receive_result = EAX;

    EDI = transfer;

    if (!EAX) {

    	status_code = EDI.http_msg.status;

    	content_pointer = EDI.http_msg.content_ptr;

    }

    content_length = EDI.http_msg.content_length;

    content_received = EDI.http_msg.content_received;

 }

bool _http::handle_redirect()

{

	dword redirect;

    http_find_header_field stdcall (transfer, "location\0");

    if (EAX!=0) {

        ESI = EAX;

        EDI = #redirect_url;

        do {

            $lodsb;

            $stosb;

        } while (AL != 0) && (AL != 13) && (AL != 10);

        DSBYTE[EDI-1]='\0';

        get_absolute_url(#finaladress, url, #redirect_url);

        strcpy(url, #finaladress);

        return true;

    }

    return false;

}

//===================================================//

//                                                   //

//                    DOWNLOADER                     //

//                                                   //

//===================================================//

enum {

	STATE_NOT_STARTED,

	STATE_IN_PROGRESS,

	STATE_COMPLETED

};

struct DOWNLOADER {

	_http httpd;

	dword bufpointer, bufsize, url;

	int state;

	dword Start();

	void Stop();

	bool MonitorProgress();

};

dword DOWNLOADER::Start(dword _url)

{

	url = _url;

	state = STATE_IN_PROGRESS;

	httpd.get(url);

	return httpd.transfer;

}

void DOWNLOADER::Stop()

{

	state = STATE_NOT_STARTED;

	if (httpd.transfer!=0)

	{

		EAX = httpd.transfer;

		EAX = EAX.http_msg.content_ptr;		// get pointer to data

		$push EAX							// save it on the stack

		http_free stdcall (httpd.transfer);	// abort connection

		$pop  EAX

		free(EAX);						// free data

		httpd.transfer=0;

		bufsize = 0;

		bufpointer = free(bufpointer);

	}

	httpd.content_received = httpd.content_length = 0;

}

bool DOWNLOADER::MonitorProgress()

{

	if (httpd.transfer <= 0) return false;

	httpd.receive();

	if (!httpd.content_length) httpd.content_length = httpd.content_received * 20;

	if (httpd.receive_result == 0) {

		if (httpd.status_code >= 300) && (httpd.status_code < 400)

		{

			httpd.handle_redirect();

			strcpy(url, httpd.url);

			get_absolute_url(#httpd.finaladress, url, #httpd.redirect_url);

			Stop();

			Start(#httpd.finaladress);

			url = #httpd.finaladress;

			return false;

		}

		state = STATE_COMPLETED;

		bufpointer = httpd.content_pointer;

		bufsize = httpd.content_received;

		httpd.free();

	}

	return true;

}

/*=====================================

==                                   ==

==         CHECK PATH TYPE           ==

==                                   ==

=====================================*/

int check_is_the_adress_local(dword _in)

{

	if (ESBYTE[_in]!='/') return false;

	_in++;

	if(!strncmp(_in,"rd/",3)) return true;

	if(!strncmp(_in,"fd/",3)) return true;

	if(!strncmp(_in,"hd",2)) return true;

	if(!strncmp(_in,"bd",2)) return true;

	if(!strncmp(_in,"cd",2)) return true;

	if(!strncmp(_in,"sys/",4)) return true;

	if(!strncmp(_in,"tmp/",4)) return true;

	if(!strncmp(_in,"usbhd",5)) return true;

	if(!strncmp(_in,"kolibrios",10)) return true;

	return false;

}

int check_is_the_url_absolute(dword _in)

{

	if(!strncmp(_in,"ftp:",4)) return true;

	if(!strncmp(_in,"http:",5)) return true;

	if(!strncmp(_in,"https:",6)) return true;

	if(!strncmp(_in,"mailto:",7)) return true;

	if(check_is_the_adress_local(_in)) return true;

	return false;

}

void get_absolute_url(dword _rez, _base, _new)

{

	int i;

	//case: ./valera.html

	if (!strncmp(_new,"./", 2)) _new+=2;

	//case: http://site.name

	if (check_is_the_url_absolute(_new)) {

		strcpy(_rez, _new);

		goto _GET_ABSOLUTE_URL_END;

	}

	//case: /valera.html

	if (ESBYTE[_new] == '/') //remove everything after site domain name

	{

		strcpy(_rez, _base);

		i = strchr(_rez+8,'/');

		if (i<1) i=strlen(_rez)+_rez;

		strcpy(i, _new);

		goto _GET_ABSOLUTE_URL_END;

	}

	//case: ../../valera.html

	strcpy(_rez, _base);

	ESBYTE[ strrchr(_rez,'/') + _rez -1 ] = '\0'; //remove name

	while (!strncmp(_new,"../",3))

	{

		_new += 3;

		ESBYTE[ strrchr(_rez,'/') + _rez -1 ] = '\0';

	}

	//case: valera.html

	chrcat(_rez, '/');

	strcat(_rez, _new);

	_GET_ABSOLUTE_URL_END:

	while (i=strstr(_rez, "&")) strcpy(i+1, i+5);

}