(MFC) REST through HTTP Proxy

Demonstrates how to connect through an HTTP proxy to make REST API calls.

Chilkat C/C++ Library Downloads MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkRest.h>
#include <CkSocket.h>
#include <CkAuthAws.h>
#include <CkXml.h>

void ChilkatSample(void)
    {
    CkString strOut;

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    // This example connects to a REST server through an HTTP proxy.
    // It will connect to the Amazon AWS service for this example.
    CkRest rest;
    CkSocket socket;

    // Set the HTTP proxy domain or IP address, and port.
    socket.put_HttpProxyHostname("192.168.1.100");
    socket.put_HttpProxyPort(8088);

    // We want to tell the socket object that we're doing HTTP over the proxy connection.
    // This is because an HTTP proxy used for other protocols (IMAP, SMTP, SSH, FTP, etc.) 
    // can require some internal differences in behavior (i.e. how we do things).
    socket.put_HttpProxyForHttp(true);

    // Other properties exist for specifying a proxy login, password, and authentication method (such as NTLM),
    // but these are not used in this example.

    // Connect through the HTTP proxy to the Amazon AWS server for the S3 service.
    bool bTls = true;
    int port = 443;
    int maxWaitMs = 5000;
    bool success = socket.Connect("s3.amazonaws.com",port,bTls,maxWaitMs);
    if (success != true) {
        strOut.append("Connect Failure Error Code: ");
        strOut.appendInt(socket.get_ConnectFailReason());
        strOut.append("\r\n");
        strOut.append(socket.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // Use the proxied TLS connection:
    success = rest.UseConnection(socket,true);
    if (success != true) {
        strOut.append(rest.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // Provide AWS credentials for the REST call.
    CkAuthAws authAws;
    authAws.put_AccessKey("AWS_ACCESS_KEY");
    authAws.put_SecretKey("AWS_SECRET_KEY");
    authAws.put_ServiceName("s3");
    success = rest.SetAuthAws(authAws);

    // List all buckets for the account...
    const char *responseXml = rest.fullRequestNoBody("GET","/");
    if (rest.get_LastMethodSuccess() != true) {
        strOut.append(rest.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    CkXml xml;
    success = xml.LoadXml(responseXml);

    // Show the full XML returned.
    strOut.append(xml.getXml());
    strOut.append("\r\n");

    // Iterate over the buckets, showing each bucket name.
    success = xml.FindChild2("Buckets");
    if (xml.FirstChild2() == true) {
        strOut.append(xml.getChildContent("Name"));
        strOut.append("\r\n");
        while ((xml.NextSibling2() == true)) {
            strOut.append(xml.getChildContent("Name"));
            strOut.append("\r\n");
        }

    }

    // Move the internal pointer back to the root node.
    xml.GetRoot2();


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }