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/*
Weather Protocol plugin for Miranda IM
Copyright (C) 2005-2011 Boris Krasnovskiy All Rights Reserved
Copyright (C) 2002-2005 Calvin Che
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; version 2
of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
This file contain the source related to downloading weather info
from the web using netlib
*/
#include "weather.h"
HANDLE hNetlibUser, hNetlibHttp;
int findHeader(NETLIBHTTPREQUEST *nlhrReply, char *hdr)
{
int res = -1, i;
for (i=0; i<nlhrReply->headersCount; i++)
{
if (_stricmp(nlhrReply->headers[i].szName, hdr) == 0)
{
res = i;
break;
}
}
return res;
}
//============ DOWNLOAD NEW WEATHER ============
// function to download webpage from the internet
// szUrl = URL of the webpage to be retrieved
// return value = 0 for success, 1 or HTTP error code for failure
// global var used: szData, szInfo = containing the retrieved data
int InternetDownloadFile (char *szUrl, char* cookie, TCHAR** szData)
{
int result = 0xBADBAD;
char* szRedirUrl = NULL;
NETLIBHTTPREQUEST nlhr = {0};
NETLIBHTTPHEADER headers[6];
// initialize the netlib request
nlhr.cbSize = sizeof(nlhr);
nlhr.requestType = REQUEST_GET;
nlhr.flags = NLHRF_DUMPASTEXT | NLHRF_HTTP11 | NLHRF_PERSISTENT | NLHRF_REDIRECT;
nlhr.szUrl = szUrl;
nlhr.nlc = hNetlibHttp;
// change the header so the plugin is pretended to be IE 6 + WinXP
nlhr.headersCount = 5;
nlhr.headers = headers;
nlhr.headers[0].szName = "User-Agent";
nlhr.headers[0].szValue = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)";
nlhr.headers[1].szName = "Cache-Control";
nlhr.headers[1].szValue = "no-cache";
nlhr.headers[2].szName = "Pragma";
nlhr.headers[2].szValue = "no-cache";
nlhr.headers[3].szName = "Connection";
nlhr.headers[3].szValue = "close";
nlhr.headers[4].szName = "Cookie";
nlhr.headers[4].szValue = cookie;
// nlhr.headers[5].szName = "If-Modified-Since";
// nlhr.headers[5].szValue = "Tue, 24 Feb 2009 03:44:23 GMT";
if (cookie == NULL || cookie[0] == 0) --nlhr.headersCount;
while (result == 0xBADBAD) {
// download the page
NETLIBHTTPREQUEST *nlhrReply = (NETLIBHTTPREQUEST*)CallService(MS_NETLIB_HTTPTRANSACTION,
(WPARAM)hNetlibUser,(LPARAM)&nlhr);
if (nlhrReply) {
// if the recieved code is 200 OK
if (nlhrReply->resultCode == 200) {
if (nlhrReply->dataLength) {
result = 0;
bool bIsUtf = false;
// allocate memory and save the retrieved data
int i = findHeader(nlhrReply, "Content-Type");
if (i != -1 && strstr(_strlwr((char*)nlhrReply->headers[i].szValue), "utf-8"))
bIsUtf = true;
else {
char* end = nlhrReply->pData;
for (;;) {
char* beg = strstr(end, "<meta");
if (beg == NULL) break;
else {
char* method, tmp;
end = strchr(beg, '>');
tmp = *end; *end = 0;
method = strstr(beg, "http-equiv=\"");
if (method && _strnicmp(method+12, "Content-Type", 12) == 0 && strstr(method, "utf-8")) {
bIsUtf = true;
break;
}
else *end = tmp;
} } }
if ( bIsUtf )
*szData = mir_utf8decodeT( nlhrReply->pData );
else
*szData = mir_a2t( nlhrReply->pData );
}
else result = DATA_EMPTY;
}
// if the recieved code is 302 Moved, Found, etc
// workaround for url forwarding
else if (nlhrReply->resultCode == 302 || nlhrReply->resultCode == 301 || nlhrReply->resultCode == 303 ) // page moved
{
// get the url for the new location and save it to szInfo
// look for the reply header "Location"
int i = findHeader(nlhrReply, "Location");
if (i != -1)
{
size_t rlen = 0;
if (nlhrReply->headers[i].szValue[0] == '/')
{
char* szPath;
char* szPref = strstr(szUrl, "://");
szPref = szPref ? szPref + 3 : szUrl;
szPath = strchr(szPref, '/');
rlen = szPath != NULL ? szPath - szUrl : strlen(szUrl);
}
szRedirUrl = (char*)mir_realloc(szRedirUrl,
rlen + strlen(nlhrReply->headers[i].szValue)*3 + 1);
strncpy(szRedirUrl, szUrl, rlen);
strcpy(szRedirUrl+rlen, nlhrReply->headers[i].szValue);
GetSearchStr(szRedirUrl);
nlhr.szUrl = szRedirUrl;
}
}
// return error code if the recieved code is neither 200 OK nor 302 Moved
else {
*szData = ( TCHAR* )mir_alloc(512);
// store the error code in szData
wsprintf(*szData, _T("Error occured! HTTP Error: %i\n"), nlhrReply->resultCode);
result = (int)nlhrReply->resultCode;
}
hNetlibHttp = nlhrReply->nlc;
// make a copy of the retrieved data, then free the memory of the http reply
CallService(MS_NETLIB_FREEHTTPREQUESTSTRUCT,0,(LPARAM)nlhrReply);
}
// if the data does not downloaded successfully (ie. disconnected), then return 1000 as error code
else
{
*szData = ( TCHAR* )mir_alloc(512);
// store the error code in szData
_tcscpy(*szData, _T("NetLib error occurred!!"));
result = NETLIB_ERROR;
hNetlibHttp = NULL;
}
}
mir_free(szRedirUrl);
return result;
}
//============ NETLIB INITIALIZATION ============
// initialize netlib support for weather protocol
void NetlibInit(void)
{
NETLIBUSER nlu = {0};
nlu.cbSize = sizeof(nlu);
nlu.flags = NUF_OUTGOING|NUF_HTTPCONNS|NUF_NOHTTPSOPTION|NUF_TCHAR;
nlu.szSettingsModule = WEATHERPROTONAME;
nlu.ptszDescriptiveName = TranslateT("Weather HTTP connections");
hNetlibUser = (HANDLE)CallService(MS_NETLIB_REGISTERUSER,0,(LPARAM)&nlu);
}
void NetlibHttpDisconnect(void)
{
if (hNetlibHttp)
{
HANDLE hConn = hNetlibHttp;
hNetlibHttp = NULL;
Netlib_CloseHandle(hConn);
}
}
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