यहाँ रखा का उपयोग कर एक बुनियादी उदाहरण है। जाहिर है आप एक कतार नहीं बल्कि वास्तविक में एक तुल्यकालिक अनुरोध से उपयोग करना चाहिए दुनिया।
आप AMZ हेडर को बदलते हैं, अमेज़न के निर्देशों के अनुसार 'canonicalizedAmzHeaders' अद्यतन करने के लिए मत भूलना।
#import "ASIHTTPRequest.h"
#import <CommonCrypto/CommonHMAC.h>
...
- (void)testS3
{
NSString *filePath = @"/path/to/file";
NSString *contentType = @"text/plain";
NSString *bucket = @"mybucket";
NSString *path = @"test";
NSString *secretAccessKey = @"my-secret-access-key";
NSString *accessKey = @"my-access-key";
NSDateFormatter *dateFormatter = [[[NSDateFormatter alloc] init] autorelease];
[dateFormatter setDateFormat:@"EEE, d MMM yyyy HH:mm:ss zzzz"];
NSString *date = [dateFormatter stringFromDate:[NSDate date]];
ASIHTTPRequest *request = [[[ASIHTTPRequest alloc] initWithURL:[NSURL URLWithString:[NSString stringWithFormat:@"http://%@.s3.amazonaws.com/%@",bucket,path]]] autorelease];
[request setPostBodyFilePath:filePath];
[request setShouldStreamPostDataFromDisk:YES];
[request setRequestMethod:@"PUT"];
[request addRequestHeader:@"x-amz-acl" value:@"private"];
[request addRequestHeader:@"Content-Type" value:contentType];
[request addRequestHeader:@"Date" value:date];
NSString *canonicalizedAmzHeaders = @"x-amz-acl:private";
NSString *canonicalizedResource = [NSString stringWithFormat:@"/%@/%@",bucket,path];
NSString *stringToSign = [NSString stringWithFormat:@"PUT\n\n%@\n%@\n%@\n%@",contentType,date,canonicalizedAmzHeaders,canonicalizedResource];
NSString *signature = [self base64forData:[self HMACSHA1withKey:secretAccessKey forString:stringToSign]];
NSString *auth = [NSString stringWithFormat:@"AWS %@:%@",accessKey,signature];
[request addRequestHeader:@"Authorization" value:auth];
[request start];
NSLog(@"%@",[request responseString]);
}
// Source: http://stackoverflow.com/questions/476455/is-there-a-library-for-iphone-to-work-with-hmac-sha-1-encoding
- (NSData *)HMACSHA1withKey:(NSString *)key forString:(NSString *)string
{
NSData *clearTextData = [string dataUsingEncoding:NSUTF8StringEncoding];
NSData *keyData = [key dataUsingEncoding:NSUTF8StringEncoding];
uint8_t digest[CC_SHA1_DIGEST_LENGTH] = {0};
CCHmacContext hmacContext;
CCHmacInit(&hmacContext, kCCHmacAlgSHA1, keyData.bytes, keyData.length);
CCHmacUpdate(&hmacContext, clearTextData.bytes, clearTextData.length);
CCHmacFinal(&hmacContext, digest);
return [NSData dataWithBytes:digest length:CC_SHA1_DIGEST_LENGTH];
}
//Source http://www.cocoadev.com/index.pl?BaseSixtyFour
- (NSString *)base64forData:(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:NSASCIIStringEncoding freeWhenDone:YES] autorelease];
}
हम्मम्म - 'यह काम नहीं करता' से परे किसी भी विवरण के बिना मदद करने के लिए बहुत मुश्किल है। क्या विशेष रूप से? किस तरह से विफल रहता है? कोड? आपने क्या प्रयास किया है – Hunter