(Objective-C) REST through HTTP Proxy

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

Chilkat Objective-C Library Downloads MAC OS X (Cocoa) Libs iOS Libs

#import <CkoRest.h>
#import <CkoSocket.h>
#import <CkoAuthAws.h>
#import <NSString.h>
#import <CkoXml.h>

// 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.
CkoRest *rest = [[CkoRest alloc] init];
CkoSocket *socket = [[CkoSocket alloc] init];

// Set the HTTP proxy domain or IP address, and port.
socket.HttpProxyHostname = @"192.168.1.100";
socket.HttpProxyPort = [NSNumber numberWithInt: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.HttpProxyForHttp = YES;

// 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 = YES;
int port = 443;
int maxWaitMs = 5000;
BOOL success = [socket Connect: @"s3.amazonaws.com" port: [NSNumber numberWithInt: port] ssl: bTls maxWaitMs: [NSNumber numberWithInt: maxWaitMs]];
if (success != YES) {
    NSLog(@"%@%d",@"Connect Failure Error Code: ",[socket.ConnectFailReason intValue]);
    NSLog(@"%@",socket.LastErrorText);
    return;
}

// Use the proxied TLS connection:
success = [rest UseConnection: socket autoReconnect: YES];
if (success != YES) {
    NSLog(@"%@",rest.LastErrorText);
    return;
}

// Provide AWS credentials for the REST call.
CkoAuthAws *authAws = [[CkoAuthAws alloc] init];
authAws.AccessKey = @"AWS_ACCESS_KEY";
authAws.SecretKey = @"AWS_SECRET_KEY";
authAws.ServiceName = @"s3";
success = [rest SetAuthAws: authAws];

// List all buckets for the account...
NSString *responseXml = [rest FullRequestNoBody: @"GET" uriPath: @"/"];
if (rest.LastMethodSuccess != YES) {
    NSLog(@"%@",rest.LastErrorText);
    return;
}

CkoXml *xml = [[CkoXml alloc] init];
success = [xml LoadXml: responseXml];

// Show the full XML returned.
NSLog(@"%@",[xml GetXml]);

// Iterate over the buckets, showing each bucket name.
success = [xml FindChild2: @"Buckets"];
if ([xml FirstChild2] == YES) {
    NSLog(@"%@",[xml GetChildContent: @"Name"]);
    while (([xml NextSibling2] == YES)) {
        NSLog(@"%@",[xml GetChildContent: @"Name"]);
    }

}

// Move the internal pointer back to the root node.
[xml GetRoot2];