Get&Post请求和MIMEType

1.GET请求：

 NSString *urlStr = [NSStringstringWithFormat:@"http://192.168.3.251/~apple/itcast/login.php?username=%@&password=%@",_userName.text,_password.text];

    

    NSURL *url = [NSURL URLWithString:urlStr];

    

    NSURLRequest *request = [NSURLRequestrequestWithURL:url];

    

    NSURLConnection *connection = [NSURLConnectionconnectionWithRequest:request delegate:self];

    

    [connection start];

2.POST请求

 NSString *urlStr = [NSStringstringWithFormat:@"http://192.168.3.251/~apple/itcast/login.php"];

    NSURL *url = [NSURL URLWithString:urlStr];

    

    NSMutableURLRequest *request = [NSMutableURLRequestrequestWithURL:url];

    

    request.HTTPMethod = @"POST";

    

    NSString *bodyStr = [NSStringstringWithFormat:@"username=%@&password=%@",_userName.text,_password.text];

    request.HTTPBody = [bodyStr dataUsingEncoding:NSUTF8StringEncoding];

    

    NSURLConnection *connection = [NSURLConnectionconnectionWithRequest:request delegate:self];

    

    [connection start];

3.同步请求，和异步请求

//异步请求

  [NSURLConnection sendAsynchronousRequest:<#(NSURLRequest *)#> queue:<#(NSOperationQueue *)#> completionHandler:<#^(NSURLResponse *response, NSData *data, NSError *connectionError)handler#>];

//同步请求

    [NSURLConnection sendSynchronousRequest:<#(NSURLRequest *)#> returningResponse:<#(NSURLResponse *__autoreleasing *)#> error:<#(NSError *__autoreleasing *)#>];

4.数据安全

MD5

5.MiMEType

.txt--------->ext/plain

.pdf-------->application/pdf

.docx ---------->application/vnd.openxmlformats-officedocument.wordprocessingml.document

.html--------->text/html