Cocoa Base 64實現REST Auth

Question

我可以使用clean，working，base64實現來實現REST協議通過HTTP進行授權的目的。

任何人都可以幫助我或指出我的方向嗎？

謝謝。

Answer 1

應該有絕對不需要你這樣做。在高層次上，Cocoa提供了NSURLConnection，它將執行HTTP認證。如果不是，則CFHTTP API提供較低級別的訪問。

Answer 2

通過使用Objective-C類別，可以擴展NSString或NSData的幾種變體。

下面是我已經加入到我的 「實用工具」 工具箱一個例子：

頁眉：

#import <Foundation/NSString.h> 

@interface NSString (Utilities) 

+ (NSString *) base64StringFromData:(NSData *)data; 

@end  

實現：

#import "NSString+Utilities.h" 

@implementation NSString (Utilities) 

+ (NSString *) base64StringFromData:(NSData *)data { 
    static const char encodingTable[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz/"; 

    if ([data length] == 0)  
    return @""; 

    char *characters = malloc((([data length] + 2)/3) * 4); 
    if (characters == NULL) 
    return nil; 
    NSUInteger length = 0; 

    NSUInteger i = 0; 
    while (i < [data length]) { 
    char buffer[3] = {0,0,0}; 
    short bufferLength = 0; 
    while (bufferLength < 3 && i < [data length]) 
     buffer[bufferLength++] = ((char *)[data bytes])[i++]; 

    // Encode the bytes in the buffer to four characters, including padding "=" characters if necessary. 
    characters[length++] = encodingTable[(buffer[0] & 0xFC) >> 2]; 
    characters[length++] = encodingTable[((buffer[0] & 0x03) << 4) | ((buffer[1] & 0xF0) >> 4)]; 

    if (bufferLength > 1) 
     characters[length++] = encodingTable[((buffer[1] & 0x0F) << 2) | ((buffer[2] & 0xC0) >> 6)]; 
    else characters[length++] = '='; 

    if (bufferLength > 2) 
     characters[length++] = encodingTable[buffer[2] & 0x3F]; 
    else characters[length++] = '=';   
    } 

    return [[[NSString alloc] initWithBytesNoCopy:characters length:length encoding:NSUTF8StringEncoding freeWhenDone:YES] autorelease]; 
} 

@end 

用法示例：

NSString *inputString = @"myInputString"; 
NSLog(@"%@", [NSString base64StringFromData:[inputString dataUsingEncoding:NSUTF8StringEncoding]]);