CFNetwork 网络请求方式1

//
//  CFNetworkTest1.m
//  TestCF
//
//  Created by Jabez on 15/5/11.
//  Copyright (c) 2015年 John. All rights reserved.
//

#import "CFNetworkTest1.h"

@implementation CFNetworkTest1

- (void)sendMessage
{
    [self magicHappens];
}

- (void)magicHappens
{
    CFHTTPMessageRef request = [self buildMeaage];
    CFHTTPMessageRef response = [self performHTTPRequest:request];

    CFIndex statusCode;
    statusCode = CFHTTPMessageGetResponseStatusCode(response);

    // An HTTP status code of 401 or 407 indicates that authentication is
    // required. I use an auth count to make sure we don't get stuck in an
    // infinite loop if our credentials are bad. Sometimes, making the
    // request more tha once lets it go through.
    // I admit I don't know why.
    //    int authCount = 0;
    //    while ((statusCode == 401 || statusCode == 407) && authCount < 3) {
    //        request = [self buildMeaage];
    //        [self addAuthentionToRequest:request withResponse:response];
    //
    //        response = [self performHTTPRequest:request];
    //        statusCode = CFHTTPMessageGetResponseStatusCode(response);
    //        authCount++;
    //    }

    CFDataRef responseDataRef = CFHTTPMessageCopyBody(response);
    NSData *responseData = (__bridge NSData *)responseDataRef;
    NSString *responseBody = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];

    NSLog(@"responseBody: %@", responseBody);
}

- (CFHTTPMessageRef)buildMeaage
{
    NSURL *url = [NSURL URLWithString:@"http://jabez.local/~jabez/test/response/response0"];
    NSData *dataToPost = [@"key=test1" dataUsingEncoding:NSUTF8StringEncoding];

    // create with the default allocator (NULL), a post request,
    // the uRL, and pick either
    // kCFHTTPVersion1_0 or kCFHTTPVersion1_1
    CFHTTPMessageRef request = CFHTTPMessageCreateRequest(NULL, CFSTR("POST"), (__bridge CFURLRef)url, kCFHTTPVersion1_1);

    CFHTTPMessageSetBody(request, (__bridge CFDataRef) dataToPost);

    // Unfortunately, this isn't smart enough to set reasonalle headers for you
    CFHTTPMessageSetHeaderFieldValue(request, CFSTR("HOST"), (__bridge CFStringRef)[url host]);
    CFHTTPMessageSetHeaderFieldValue(request, CFSTR("Content-Length"), (__bridge CFStringRef) [NSString stringWithFormat:@"%li", [dataToPost length]]);
    CFHTTPMessageSetHeaderFieldValue(request, CFSTR("Content-Type"), CFSTR("charset=utf-8"));

    return ((CFHTTPMessageRef) CFAutorelease(request));
}

- (CFHTTPMessageRef)performHTTPRequest:(CFHTTPMessageRef)request
{
    CFReadStreamRef requestStream = CFReadStreamCreateForHTTPRequest(NULL, request);
    CFReadStreamOpen(requestStream);

    NSMutableData *responseBytes = [NSMutableData data];

    CFIndex numBytesRead = 0;
    do {
        UInt8 buf[1024];
        numBytesRead = CFReadStreamRead(requestStream, buf, sizeof(buf));

        if (numBytesRead > 0) {
            [responseBytes appendBytes:buf length:numBytesRead];
        }
    } while (numBytesRead > 0);

    CFHTTPMessageRef response = (CFHTTPMessageRef) CFReadStreamCopyProperty(requestStream, kCFStreamPropertyHTTPResponseHeader);
    CFHTTPMessageSetBody(response, (__bridge CFDataRef)responseBytes);

    CFReadStreamClose(requestStream);
    CFRelease(requestStream);

    return ((CFHTTPMessageRef) CFAutorelease(response));
}

- (Boolean)addAuthentionToRequest:(CFHTTPMessageRef)request withResponse:(CFHTTPMessageRef)response
{
    CFHTTPAuthenticationRef authentication = CFHTTPAuthenticationCreateFromResponse(NULL, response);

    CFStreamError err;
    Boolean success = CFHTTPMessageApplyCredentials(request, authentication, CFSTR("username"), CFSTR("password"), &err);
    return success;
}

@end