1

我在服务器上发送第一个请求以获取 cookie：

NSString* request = [NSString stringWithFormat:@"%@",SERVER_ADDRESS1];
responseData = [[NSMutableData data] retain];
NSURLRequest *urlrequest = [NSURLRequest requestWithURL:[NSURL URLWithString:request]];
[[NSURLConnection alloc] initWithRequest:urlrequest delegate:self];

在我们设置属性（cookies 和 crsf 令牌）之后：

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
[responseData setLength:0];

NSHTTPURLResponse *HTTPResponse = (NSHTTPURLResponse *)response;
NSDictionary *fields = [HTTPResponse allHeaderFields];
self.cookies = [fields valueForKey:@"Set-Cookie"];
if (self.cookies){
    NSString *crsf = [NSString stringWithString:[[self.cookies componentsSeparatedByString:@";"] objectAtIndex:0]];
    NSString *rescrsf = [NSString stringWithString:[[crsf componentsSeparatedByString:@"="] objectAtIndex:1]];
    self.cookies_csrf = rescrsf;
}

}

在我们打印响应并发送第二个请求之后：

- (void)connectionDidFinishLoading:(NSURLConnection *)connection {

NSString *dump = [[NSString alloc] initWithData:self.responseData encoding:NSUTF8StringEncoding];
NSLog(@"data: %@", dump);
self.namesArray = [dump componentsSeparatedByString:@"\n"];
[connection release];
[dump release];


NSURL *url = [NSURL URLWithString:@"https://servername/login/"];
NSString *postBodyStr = [SKUtils reqBodyCreateNewUsername:@"demo" password:@"123" check:@"1"];
NSData *postBody = [postBodyStr dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:YES];
NSString *postLength = [NSString stringWithFormat:@"%d", [postBody length]];

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0];


[request setHTTPMethod:@"POST"];
[request setValue:postLength forHTTPHeaderField:@"Content-Length"];
[request setValue:self.cookies forHTTPHeaderField:@"Cookie"];
[request setValue:self.cookies_csrf forHTTPHeaderField:@"X-CSRFToken" ];
[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
[request setHTTPBody:postBody];
[[NSURLConnection alloc] initWithRequest:request delegate:self];

}

这一刻非常有趣：第二次请求后的响应看起来像带有 403 错误的 html 页面：

  <h1>Forbidden <span>(403)</span></h1>
  <p>CSRF verification failed. Request aborted.</p>

我做错了什么？

PS。SKUtils 的其他方法：

+ (NSString *)reqBodyCreateNewUsername:(NSString *)username password:(NSString *)pass check:(NSString *)ch  {
NSArray *keys   = [NSArray arrayWithObjects:@"username",@"password",@"mobile", nil];
NSArray *values = [NSArray arrayWithObjects:username, pass,ch, nil];
NSDictionary *params = [NSDictionary dictionaryWithObjects:values forKeys:keys];

return [SKUtils generateURLForActivity:nil hostName:NULL andParams:params];
}



+ (NSString *)generateURLForActivity:(NSString *)activityName hostName:(const char *)host andParams:(NSDictionary *)params {
NSMutableDictionary *fullParams = [[[NSMutableDictionary alloc] initWithDictionary:params] autorelease];


NSMutableString *urlStr = [[[NSMutableString alloc] init] autorelease];

if (host != NULL) {
    [urlStr appendFormat:@"%s", host];
}
if (activityName != nil) {
    [urlStr appendFormat:@"%@?", activityName];
}


NSArray *allKeys =  [fullParams allKeys];
for (int paramIndex = 0; paramIndex < [allKeys count]; paramIndex++) {
    NSString *curKey = [allKeys objectAtIndex:paramIndex];
    id obj = [fullParams objectForKey:curKey];
    if ([obj isKindOfClass:[NSString class]]) {
        [urlStr appendFormat:@"%@=%@&", curKey, [SKUtils escapeString:[fullParams objectForKey:curKey] withEncoding:NSUTF8StringEncoding]];
    }
    else {
        [urlStr appendFormat:@"%@=%@&", curKey, [fullParams objectForKey:curKey]];
    }
}


NSString *result = [NSString stringWithFormat:@"%@", urlStr];
    return result;
}


+ (NSString *)escapeString:(NSString *)string withEncoding:(NSStringEncoding)encoding
{
//  CFSTR(":/?#[]@!$&’()*+,;=”)
NSString *result = (NSString *)CFURLCreateStringByAddingPercentEscapes(NULL, (CFStringRef)string,
                                                                       NULL, (CFStringRef)@";/?:@&=$+{}<>,",
                                                                       CFStringConvertNSStringEncodingToEncoding(encoding));
return [result autorelease];
}
4

1 回答 1

0

我找到解决办法！！删除线

[request setValue:self.cookies_csrf forHTTPHeaderField:@"X-CSRFToken" ];

并粘贴这一行

[request setValue:SERVER_ADDRESS1 forHTTPHeaderField:@"Referer" ];

SERVER_ADDRESS1 - 第一个请求的地址。

于 2013-08-15T08:57:52.547 回答