Visual C++ HTTP Get and HTTP Post Sample Source Code
Network Component provides an easy-to-use development interface to a variety of IP protocols. By using Network Component, you can very easily create or enhance applications with network features.
Network Component features the following: DNS, FTP, HTTP, HTTPs, ICMP Ping, IP-to-Country, MSN, NTP, RSH, SCP, SFTP, SNMP v1/v2c (Get, GetNext, Set), SNMP Traps, SNMP MIB, SSH, TCP, Telnet, TFTP, UDP, Telnet, Wake-On-LAN and more.
Network Component can be well integrated into any development platform that supports ActiveX objects.
The most important functions of the Http object are:
- Connect - connect to the (remote) HTTP web server on port 80 or any alternate port; optionally, use proxy credentials to use a proxy server; optionally, specify a web account and password for password protected web sites
- Disconnect - to diconnect after a connect call;
- ReadData - read all data from a web page;
- WriteData - write data to a web page.
Step 1: Download and install the Network Component
Download Network Component from the ActiveXperts Download Site and start the installation. The installation guides you through the installation process.
Step 2: Create a new Visual C++ project
Launch 'Microsoft Visual C++' from the Start menu, and choose 'New' from the 'File Menu'. The 'New' dialog appears.
Select the type of project (for instance: 'Win32 Console Application'), enter a 'Project name' and select the 'Location':
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Select the kind of project, for instance a 'Hello, world!' application and click 'Finish':
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Step 3: Refer to the Network Component Library and declare the objects
A new Project is created now.
Before you can use Network Component, you need to refer to the Network Component library. The actually reference files are shipped with the product and are located in the following directory:
C:\Program Files\ActiveXperts\Network Component\Examples\Visual C++\Include
Copy all files in the above directory ('ASocket.h', 'ASocket_i.c' and 'ASocketConstants.h') to your project directory.
On top of your code, declare the following object:
IFtpServer *pFtpServer = NULL;
Step 4: Create the objects
Since the Network Component is a COM object, you must initialize the COM library before they can call COM library functions (e.g. Network Component functions):
CoInitialize(NULL);
Create the object in the following way:
CoCreateInstance(CLSID_Http, NULL, CLSCTX_INPROC_SERVER, IID_IHttp, (void**) &pHttp );