Network Communication lesson 4 A complete case of a Post request sent by C++
Description
The current example uses boost asio library to send HTTP data message, and uses boost::asio::streambuf request stream to encapsulate the data message, at the end of the example.
The response packet is analyzed by string to obtain the json format packet.
# include
# include
# include
# include
Using namespace std
Using namespace boost::asio
Unsigned char ToHex (unsigned char x)
{
Return x > 9? X + 55: X + 48
}
Unsigned char FromHex (unsigned char x)
{
Unsigned char y
If (x > ='A'& & x ='a'& & x ='0' & & x > 4)
StrTemp + = ToHex ((unsigned char) str [I]% 16)
}
}
Return strTemp
}
Std::string UrlDecode (const std::string& str)
{
Std::string strTemp = ""
Size_t length = str.length ()
For (size_t I = 0; I < length; iTunes +)
{
If (str [I] ='+') strTemp + =''
Else if (str [I] = ='%')
{
Assert (I + 2 < length)
Unsigned char high = FromHex ((unsigned char) str[ + + I])
Unsigned char low = FromHex ((unsigned char) str[ + + I])
StrTemp + = high * 16 + low
}
Else strTemp + = str [I]
}
Return strTemp
}
Int HttpPost ()
{
/ / char szSrcBuffer [1024] = {"authorJson= {loginAccount:\" admin\ "} & parmJson= {code:\" SheBeiLiXianGaoJingShangChuan\ ", params: {id:\" 123456\ ", remarks:\" fire alarm\ ", time_alarm:\" 2017-1-1\ ", alarm_source:\" 192.168.1.11\ "}
Char szSrcBuffer [1024] = {"authorJson= {loginAccount:\" admin\ "} & parmJson= {code:\" SheBeiLiXianChaXun\ ", params: {}}"}
Std::string strUrlEnCodedBuffer = UrlEncode (szSrcBuffer)
Io_service iosev
Ip::tcp::socket socket (iosev)
Ip::tcp::endpoint ep (ip::address_v4::from_string ("192.168.0.88"), 8080)
Boost::system::error_code ec
Socket.connect (ep, ec)
If (ec) return-1
Boost::asio::streambuf request
Std::ostream request_stream & request)
Request_stream
