/*
************************************************************************************
項(xiàng)目是分析各視頻的真實(shí)地址 生成一個(gè)dll, 供其它項(xiàng)目使用, 項(xiàng)目中使用了zlib, boost, 要另下載
如果是sohu網(wǎng)站則自己分析地址. 如果是其它視頻網(wǎng)站才從flvcd上獲取結(jié)果.
項(xiàng)目中使用了:
1.gizp解壓.
2.UTF8與GB2312轉(zhuǎn)碼
3.boost正則表達(dá)式 boost查找單個(gè)匹配, 查找所有匹配
4.sohu視頻地址是分了四類視頻分析的. 可以用fiddler查找功能查找到所想要的幾個(gè)字符串
5.文件獲取是使用的MFC中的CHttpFile獲取的, 嘗試用了WinINet和WinHTTP ms的api訪問網(wǎng)絡(luò)的都不怎么行.
chrome瀏覽器第一個(gè)版本是用winhttp訪問網(wǎng)絡(luò)的. 也試過socket訪問網(wǎng)絡(luò) 但要跳轉(zhuǎn)什么的太繁了
6.函數(shù)導(dǎo)出, 可以用def文件. 也可以用dellexport
7.多線程CreateThread
注:
網(wǎng)絡(luò)訪問花了相當(dāng)大的時(shí)間
正則表達(dá)式boost中的perl正則表達(dá)式. "要寫成\" \要寫成\\, 要多用查找替換. 匹配多個(gè)結(jié)果時(shí)要迭代搜索查詢
網(wǎng)絡(luò)給的數(shù)據(jù)是壓縮的gzip問題也花了好長(zhǎng)時(shí)間.
utf-8與gb2312轉(zhuǎn)換也花了好長(zhǎng)時(shí)間.
buff最后一次讀取時(shí), 字符串沒法控制. 內(nèi)存初始化是沒置成0就行了
函數(shù)導(dǎo)出研究了兩種方法, 花了很長(zhǎng)時(shí)間.
多線程沒花多長(zhǎng)時(shí)間
************************************************************************************
*/
?
Analyzer.cpp
vector<string> Analyzer::GetPropertyInIntegratedBrackets(string strPropertyName, string strJson)
{
vector<string> vect;
regex regclipsURL("(?<=(" + strPropertyName + "\":\\[))[^]]+?(?=(]))");
boost::smatch what;
string strclipsURL = "";
//轉(zhuǎn)成另一個(gè)變量再傳，不然出錯(cuò) 強(qiáng)轉(zhuǎn)是強(qiáng)的指針,以前是結(jié)構(gòu)類型,強(qiáng)指針沒用
if(regex_search(strJson, what, regclipsURL))
{
strclipsURL = what[0];
}
int iIndex = 0;
while (iIndex >= 0)
{
iIndex = strclipsURL.find(',');
if(iIndex > 0)
{
vect.push_back(strclipsURL.substr(1, iIndex - 2));//去了兩邊的雙引號(hào)
strclipsURL = strclipsURL.substr(iIndex + 1);
}
else
vect.push_back(strclipsURL.substr(1,strlen(strclipsURL.c_str()) - 2)); //去了兩邊的雙引號(hào)
}
return vect;
}
int Analyzer::httpgzdecompress(Byte *zdata, uLong nzdata, Byte *data, uLong *ndata)
{
int err = 0;
z_stream d_stream = {0}; /* decompression stream */
static char dummy_head[2] =
{
0x8 + 0x7 * 0x10,
(((0x8 + 0x7 * 0x10) * 0x100 + 30) / 31 * 31) & 0xFF,
};
d_stream.zalloc = (alloc_func)0;
d_stream.zfree = (free_func)0;
d_stream.opaque = (voidpf)0;
d_stream.next_in = zdata;
d_stream.avail_in = 0;
d_stream.next_out = data;
if(inflateInit2(&d_stream, 47) != Z_OK) return -1;
while (d_stream.total_out < *ndata && d_stream.total_in < nzdata)
{
d_stream.avail_in = d_stream.avail_out = 1; /* force small buffers */
if((err = inflate(&d_stream, Z_NO_FLUSH)) == Z_STREAM_END) break;
if(err != Z_OK )
{
if(err == Z_DATA_ERROR)
{
d_stream.next_in = (Bytef*) dummy_head;
d_stream.avail_in = sizeof(dummy_head);
if((err = inflate(&d_stream, Z_NO_FLUSH)) != Z_OK)
{
return -1;
}
}
else return -1;
}
}
if(inflateEnd(&d_stream) != Z_OK) return -1;
*ndata = d_stream.total_out;
return 0;
}
//ms-help://MS.VSCC.v90/MS.MSDNQTR.v90.chs/intl/unicode_81rn.htm
//將UTF8字符串轉(zhuǎn)換為gb2312
CString Analyzer::ConvertUTF8toGB2312(const char *pData, size_t size)
{
size_t n = MultiByteToWideChar(CP_UTF8, 0, pData, (int)size, NULL, 0);
WCHAR * pChar = new WCHAR[n+1];
n = MultiByteToWideChar(CP_UTF8, 0, pData, (int)size, pChar, n);
pChar[n]=0;
n = WideCharToMultiByte(936, 0, pChar, -1, 0, 0, 0, 0);
char *p = new char[n+1];
n = WideCharToMultiByte(936, 0, pChar, -1, p, (int)n, 0, 0);
CString result(p);
delete []pChar;
delete []p;
return result;
}
CString Analyzer::GetPageHtml(CString strUrl)
{
CString strHtml = "";//獲取HTML
try
{
strUrl = strUrl.Trim();
CInternetSession session("HttpClient");
session.SetOption(INTERNET_OPTION_CONNECT_TIMEOUT, 5000); // 5秒的連接超時(shí)
session.SetOption(INTERNET_OPTION_SEND_TIMEOUT, 1000); // 1秒的發(fā)送超時(shí)
session.SetOption(INTERNET_OPTION_RECEIVE_TIMEOUT, 7000); // 7秒的接收超時(shí)
session.SetOption(INTERNET_OPTION_DATA_SEND_TIMEOUT, 1000); // 1秒的發(fā)送超時(shí)
session.SetOption(INTERNET_OPTION_DATA_RECEIVE_TIMEOUT, 7000); // 7秒的接收超時(shí)
session.SetOption(INTERNET_OPTION_CONNECT_RETRIES, 1); // 1次重試
CHttpFile* pFile = (CHttpFile*)session.OpenURL((LPCTSTR)strUrl, 1, INTERNET_FLAG_RELOAD | INTERNET_FLAG_TRANSFER_BINARY);
DWORD dwStatusCode;
pFile-> QueryInfoStatusCode(dwStatusCode);
if(dwStatusCode == HTTP_STATUS_OK)
{
CString strLength = "";
CString strHeaders = "";
pFile->QueryInfo(HTTP_QUERY_CONTENT_LENGTH, strLength);
pFile->QueryInfo(HTTP_QUERY_RAW_HEADERS_CRLF, strHeaders);
long lLength = 4096 * 500;
byte* pbHtml = new byte[lLength]; //在堆上動(dòng)態(tài)分配內(nèi)存
memset(pbHtml, 0, lLength); //初始化
byte sRecived[512];
int iIndex = 0;
int num = 0;
while((num = pFile->Read(sRecived,512)) > 0 )
{
memcpy(pbHtml+iIndex, sRecived, num);
iIndex+=num;
}
pbHtml[iIndex] = NULL;
if(strHeaders.Find("gzip") > -1)
{
uLong ulLength = 4096 * 500;
byte* pbData = new byte[ulLength];
memset(pbData,0,ulLength);
httpgzdecompress(pbHtml, lLength, pbData, &ulLength);
pbData[ulLength] = NULL;
strHtml = (CHAR*)pbData;
delete pbData;
}
else
{
strHtml = (CHAR*)pbHtml;
if(strHeaders.MakeLower().Find("utf-8") > - 1 || strHtml.MakeLower().Find("utf-8") > -1)//strHtml變成小寫了
{
strHtml = ConvertUTF8toGB2312((CHAR*)pbHtml,strlen((CHAR*)pbHtml));//編碼轉(zhuǎn)換
}
else//重新得到大小寫區(qū)分的
{
strHtml = (CHAR*)pbHtml;
}
}
delete pbHtml;
}
pFile -> Close();
delete pFile;
session.Close();
return strHtml;
}
catch (CException* e)
{
(void)e;
this->m_State = Analyzer_State_NetError;
return "";
}
}
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