ios – Twitter OAuth 1 POST请求无效

我正在为iOS创建一个应用程序,我正在使用这个 OAuth library. GET请求似乎工作正常,但是一旦我尝试发出POST请求,我就会收到以下错误：

现在我不太确定发生了什么,因为POST请求的生成与GET请求非常相似.是什么原因造成了这个错误？

以下是生成请求的代码：

+ (NSURLrequest *)preparedrequestForPath:(NSString *)path
                              parameters:(NSDictionary *)queryParameters
                              httpR_495_11845@ethod:(NSString *)httpR_495_11845@ethod
                              oauthToken:(NSString *)oauth_token
                             oauthSecret:(NSString *)oauth_token_secret
{
    if (!httpR_495_11845@ethod
        || !oauth_token) return nil;



    NSMutableDictionary *allParameters = [self standardOauthParameters];
    allParameters[@"oauth_token"] = oauth_token;
    if (queryParameters) [allParameters addEntriesFromDictionary:queryParameters];

    NSString *parameteRSString = CHQueryStringFromParametersWithEncoding(allParameters,NSUTF8StringEncoding);

    NSString *request_url = API_URL;
    if (path) request_url = [request_url StringByAppendingString:path];
    NSString *oauth_consumer_secret = CONSUMER_SECRET;
    NSString *baseString = [httpR_495_11845@ethod StringByAppendingFormat:@"&%@&%@",request_url.utf8AndURLEncode,parameteRSString.utf8AndURLEncode];
    NSString *secretString = [oauth_consumer_secret.utf8AndURLEncode StringByAppendingFormat:@"&%@",oauth_token_secret.utf8AndURLEncode];
    NSString *oauth_signature = [self.class signClearText:baseString withSecret:secretString];
    allParameters[@"oauth_signature"] = oauth_signature;

    NSString *queryString;
    if (queryParameters) queryString = CHQueryStringFromParametersWithEncoding(queryParameters,NSUTF8StringEncoding);
    if (queryString) request_url = [request_url StringByAppendingFormat:@"?%@",queryString];
    NSMutableURLrequest *request = [NSMutableURLrequest requestWithURL:[NSURL URLWithString:request_url]];
    request.httpR_495_11845@ethod = httpR_495_11845@ethod;

    NSMutableArray *parameterPairs = [NSMutableArray array];
    [allParameters removeObjectsForKeys:queryParameters.allKeys];
    for (NSString *name in allParameters) {
        NSString *aPair = [name StringByAppendingFormat:@"=\"%@\"",[allParameters[name] utf8AndURLEncode]];
        [parameterPairs addObject:aPair];
    }
    NSString *oAuthHeader = [@"OAuth " StringByAppendingFormat:@"%@",[parameterPairs componentsJoinedByString:@","]];
    [request SETVALue:oAuthHeader forhttpHeaderField:@"Authorization"];

    if ([httpR_495_11845@ethod isEqualToString:@"POST"]
        && queryParameters != nil) {
        NSData *body = [queryString dataUsingEncoding:NSUTF8StringEncoding];
        [request sethttpBody:body];
    }

    return request;
}

编辑

我设置http主体的代码的最后几行似乎导致了问题.当我删除线条

NSData *body = [queryString dataUsingEncoding:NSUTF8StringEncoding];
 [request sethttpBody:body];

一切正常,除非参数特别大,如发送base64编码图像,它显然失败了……我有什么办法可以解决这个问题？