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/*
Weather Protocol plugin for Miranda IM
Copyright (c) 2012 Miranda NG team
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 "stdafx.h"
HNETLIBUSER hNetlibUser;
HNETLIBCONN hNetlibHttp;
static int findHeader(const NETLIBHTTPREQUEST *nlhrReply, const char *hdr)
{
for (int i = 0; i < nlhrReply->headersCount; i++) {
if (_stricmp(nlhrReply->headers[i].szName, hdr) == 0) {
return i;
}
}
return -1;
}
//============ 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, char *userAgent, wchar_t **szData)
{
if (userAgent == nullptr || userAgent[0] == 0)
userAgent = NETLIB_USER_AGENT;
NETLIBHTTPHEADER headers[5];
headers[0].szName = "User-Agent";
headers[0].szValue = userAgent;
headers[1].szName = "Cache-Control";
headers[1].szValue = "no-cache";
headers[2].szName = "Pragma";
headers[2].szValue = "no-cache";
headers[3].szName = "Connection";
headers[3].szValue = "close";
headers[4].szName = "Cookie";
headers[4].szValue = cookie;
// initialize the netlib request
NETLIBHTTPREQUEST nlhr = { sizeof(nlhr) };
nlhr.requestType = REQUEST_GET;
nlhr.flags = NLHRF_DUMPASTEXT | NLHRF_HTTP11 | NLHRF_PERSISTENT | NLHRF_REDIRECT;
nlhr.szUrl = szUrl;
nlhr.nlc = hNetlibHttp;
nlhr.headers = headers;
nlhr.headersCount = _countof(headers);
if (cookie == nullptr || cookie[0] == 0)
--nlhr.headersCount;
// download the page
NETLIBHTTPREQUEST *nlhrReply = Netlib_HttpTransaction(hNetlibUser, &nlhr);
if (nlhrReply == nullptr) {
// if the data does not downloaded successfully (ie. disconnected), then return 1000 as error code
*szData = (wchar_t*)mir_alloc(512);
// store the error code in szData
mir_wstrcpy(*szData, L"NetLib error occurred!!");
hNetlibHttp = nullptr;
return NLHRF_REDIRECT;
}
// if the recieved code is 200 OK
int result;
if (nlhrReply->resultCode == 200) {
if (nlhrReply->dataLength) {
bool bIsUtf = false;
result = 0;
// allocate memory and save the retrieved data
int i = findHeader(nlhrReply, "Content-Type");
// look for Content-Type=utf-8 in header
if (i != -1 && strstr(_strlwr(nlhrReply->headers[i].szValue), "utf-8"))
bIsUtf = true;
else {
char *end = nlhrReply->pData;
while (end) {
// look for
// <meta http-equiv="Content-Type" content="utf-8" />
char* beg = strstr(end, "<meta");
if (beg)
{
end = strchr(beg, '>');
if (end)
{
char tmp = *end;
*end = 0;
char *method = strstr(beg, "http-equiv=\"");
if (method && _strnicmp(method + 12, "Content-Type", 12) == 0 && strstr(method, "utf-8")) {
bIsUtf = true;
*end = tmp;
break;
}
else *end = tmp;
}
}
else
break;
}
}
wchar_t *retVal = nullptr;
if (bIsUtf)
retVal = mir_utf8decodeW(nlhrReply->pData);
if (retVal == nullptr)
retVal = mir_a2u(nlhrReply->pData);
*szData = retVal;
}
else result = DATA_EMPTY;
}
// return error code if the recieved code is neither 200 OK nor 302 Moved
else {
*szData = (wchar_t*)mir_alloc(512);
// store the error code in szData
mir_snwprintf(*szData, 512, L"Error occured! HTTP Error: %i\n", nlhrReply->resultCode);
result = nlhrReply->resultCode;
}
hNetlibHttp = nlhrReply->nlc;
// make a copy of the retrieved data, then free the memory of the http reply
Netlib_FreeHttpRequest(nlhrReply);
return result;
}
//============ NETLIB INITIALIZATION ============
//
// initialize netlib support for weather protocol
void NetlibInit(void)
{
NETLIBUSER nlu = {};
nlu.flags = NUF_OUTGOING | NUF_HTTPCONNS | NUF_NOHTTPSOPTION | NUF_UNICODE;
nlu.szSettingsModule = WEATHERPROTONAME;
nlu.szDescriptiveName.w = TranslateT("Weather HTTP connections");
hNetlibUser = Netlib_RegisterUser(&nlu);
}
void NetlibHttpDisconnect(void)
{
if (hNetlibHttp) {
HANDLE hConn = hNetlibHttp;
hNetlibHttp = nullptr;
Netlib_CloseHandle(hConn);
}
}
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