如何获取HTTP post请求以获取响应iPhone应用程序的JSON对象？

Question

我在服务器上运行的Web服务以XML格式或JSON格式返回数据。 我想要请求JSON格式但使用HTTP Post方法。

任何帮助都非常感激。

提前感谢。

Answer 1

这是适用于JSON帖子请求的代码， TouchJSON Framework用于解析JSON，感谢'schwa'。

NSArray *keys = [NSArray arrayWithObjects:@"username", @"password", @"preference", @"uid", nil];
NSArray *objects = [NSArray arrayWithObjects:@"accuser", @"accpass", @"abc_region", @"100", nil];
NSDictionary *theRequestDictionary = [NSDictionary dictionaryWithObjects:objects forKeys:keys];

NSURL *theURL = [NSURL URLWithString:@"http://url.com/request.php"];
NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:theURL cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:10.0f];
[theRequest setHTTPMethod:@"POST"];

[theRequest setValue:@"application/json-rpc" forHTTPHeaderField:@"Content-Type"];
NSString *theBodyString = [[CJSONSerializer serializer] serializeDictionary:theRequestDictionary];
NSLog(@"%@", theBodyString);
NSData *theBodyData = [theBodyString dataUsingEncoding:NSUTF8StringEncoding];
// NSLog(@"%@", theBodyData);
[theRequest setHTTPBody:theBodyData];

NSURLResponse *theResponse = NULL;
NSError *theError = NULL;
NSData *theResponseData = [NSURLConnection sendSynchronousRequest:theRequest returningResponse:&theResponse error:&theError];
NSString *theResponseString = [[[NSString alloc] initWithData:theResponseData encoding:NSUTF8StringEncoding] autorelease];
NSLog(theResponseString);
NSDictionary *theResponseDictionary = [[CJSONDeserializer deserializer] deserialize:theResponseString];
NSLog(@"%@", theResponseDictionary);
NSString *theGreeting = [theResponseDictionary objectForKey:@"greeting"];
[self setValue:theGreeting forKey:@"greeting"];

Answer 2

不确定您的问题究竟是什么。但谷歌“TouchJSON”这应该可以帮助你开始。

Answer 3

很抱歉错误和内存泄漏，但是如下：

CFURLRef url = CFURLCreateWithString(NULL, CFSTR("http://example.com/post"), NULL);
CFHTTPMessageRef msg = CFHTTPMessageCreateRequest(
    NULL,
    CFSTR("POST"),
    url,
    kCFHTTPVersion1_1);

const char *body = "key=value&id=30293";
CFDataRef bodyData = CFDataCreate(NULL, body, strlen(body));
CFHTTPMessageSetBody(msg, bodyData);

CFReadStreamRef myReadStream = CFReadStreamCreateForHTTPRequest(NULL, myRequest);
CFReadStreamOpen(myReadStream);
CFHTTPMessageRef myResponse = CFReadStreamCopyProperty(
    myReadStream,
    kCFStreamPropertyHTTPResponseHeader);

//
// Handle myResponse
//

CFReadStreamClose(myReadStream);
CFRelease(myReadStream);
CFRelease(bodyData);
CFRelease(msg);
CFRelease(url);