网请错误：base64转码、“UTF-8”网请

由于所有信息是以“UTF-8”的形式，进行上传。 所以“POST请求”配置 ：[manager.requestSerializer setValue:@"application/x-www-form-urlencoded;charset=utf8" forHTTPHeaderField:@"Content-Type"];

base64加密（GTM三方库）

/** GTM 转码 */
-(NSString *)base64Code {
    //使用UTF-8方式转码
    NSData * data = [self dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:YES];
    data = [GTMBase64 encodeData:data];
    NSString * output = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
//    NSLog(@"%@",output);
    return output;
}

网请操作：

NSDictionary * elementDict =
    @{@"token":[User_Def objectForKey:@"token"]?[User_Def objectForKey:@"token"]:@"",//token
      @"title":_titleTF.text,//标题
      @"content":_detailTV.text,//内容
      @"startDate":startDateStr,//开始日期
      @"endDate":endDateStr,//结束日期
      };
 //使用YYModel，获得字典的json字符串
 NSString * elementStr = [NSString dictionaryToJson:elementDict];
 //base64加密
 NSString * base64ElementStr = [elementStr base64Code];

 //拼接好URL字符串
 NSString * urlStr = [NSString stringWithFormat:@"%@%@%@%@",Url_Header,CreateIdeaUrl,DataCodeUrl,base64ElementStr];

 //需要以“UTF-8”编码格式，进行请求
 urlStr = [urlStr stringByAddingPercentEncodingWithAllowedCharacters: [NSCharacterSet characterSetWithCharactersInString:urlStr]];

 //单例类 网请
 [NetRequest_Shared POSTChineseUrl:urlStr parameters:nil success:^(id _Nullable responseObject) {
            NSLog(@"%@",responseObject);

  } failure:^(NSError * _Nonnull error)  {
            NSLog(@"%@",error);
            NSLog (@"operation: %@",[error localizedDescription] );

  } ];

网络请求单例类：NetRequest

“NetRequest.h”文件：

//单例宏
#define NetRequest_Shared [NetRequest sharedNetRequest]


//POST中文
-(void)POSTChineseUrl:(NSString *)url parameters:(NSDictionary *)parameters success:(void (^)(id))success failure:(void (^)(NSError *))failure; //POST中文

“NetRequest.m”文件：

//单例
+ (id)sharedNetRequest { 
    static NetRequest * netRequest = nil;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        netRequest = [[NetRequest alloc] initSingleton];
    });
    return netRequest;
}
- (instancetype)initSingleton {
    if (self = [super init]) {
        
    }
    return self;
}


//POST中文
-(void)POSTUrl:(NSString *)url parameters:(NSDictionary *)parameters success:(void (^)(id))success failure:(void (^)(NSError *))failure {

    AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
    manager.securityPolicy = [AFSecurityPolicy policyWithPinningMode:AFSSLPinningModeNone]; //表示不做SSL pinning
    

    NSStringEncoding enc = CFStringConvertEncodingToNSStringEncoding (kCFStringEncodingGB_18030_2000);
    manager.requestSerializer.stringEncoding = enc;//UTF8

    manager.requestSerializer = [AFJSONRequestSerializer serializer];
    [manager.requestSerializer setValue:@"application/x-www-form-urlencoded;charset=utf8" forHTTPHeaderField:@"Content-Type"];//UTF8类型

    manager.responseSerializer = [AFJSONResponseSerializer serializer];
    manager.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"application/json", @"text/html",@"text/json",@"text/javascript",@"text/html", @"text/plain", nil];
     


    manager.requestSerializer.timeoutInterval = 6; //请求超时
    [manager POST:url parameters:parameters progress:nil success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
         if (success) {
           success(responseObject);
         }
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
         if (failure) {
           failure(error);
         }
    }];

}

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以上方式使用时，经常会报如下两种错误：

• 1.“Unterminated string at character 227 of of {\n \"token\" : \"eyJhc…………………………………………………………” 一般：//标点符号

• 2.“Expected a ',' or '}' at character 199 of {\n \"token\" : \"eyJhc…………………………………………………………” 一般：//汉字

别人说法是：json数据格式问题

例子： "Expected a ',' or '}' at character 211 of {\n \"token\" : \"…………………………………………………………\",\n \"IdeaId\" : \"29cbffc82ef54f91b004f72a421d2714\",\n \"content\" : \"g\Ufffd\Ufffd#\Ufffd\Ufffd\U07e6\Ufffd;\Ufffd\U2dd6\Ufffd\Ufffd\Ufffdc\Ufffd\v\Ufffd\"C\Ufffd\v\Ufffd\Ufffd;\UfffdV\Ufffd\Ufffdm\U064c\Ufffd)\Ufffd"; } 一般是自己转换的json字符串，包含了“\n”字符串

解决方案：

NSString * elementStr = [NSString dictionaryToJson:elementDict];
//“\n”改成下滑线“”
elementStr = [elementStr stringByReplacingOccurrencesOfString:@"\n" withString:@""];

或者使用YYmodel转换为json字符串：⭐️

NSString * elementStr = [elementDict yy_modelToJSONString]; //json相连（数据）

自己试了很久，没用！ 原因：在没加密之前处理字符串，是没用的！(使用YYModel转换的json字符串是标准的)

而应该处理：base64加密后的字符串。

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解决办法：把 不规则的base64字符，修改成规则

//不规则的base64字符修改成规则
base64ElementStr = (NSString *)CFBridgingRelease(CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault,\
(CFStringRef)base64ElementStr,NULL,CFSTR("!*'();:@&=+$,/?%#[]"),kCFStringEncodingUTF8));

最终 网请操作：

NSDictionary * elementDict =
    @{@"token":[User_Def objectForKey:@"token"]?[User_Def objectForKey:@"token"]:@"",//token
      @"title":_titleTF.text,//题目
      @"content":_detailTV.text,//内容
      @"startDate":startDateStr,//开始日期
      @"endDate":endDateStr,//结束日期
      };
 //使用YYModel，获得字典的json字符串
 NSString * elementStr = [NSString dictionaryToJson:elementDict];
 //base64加密
 NSString * base64ElementStr = [elementStr base64Code];

 //⭐️⭐️⭐️不规则的base64字符修改成规则⭐️⭐️⭐️
 base64ElementStr = (NSString *)CFBridgingRelease(CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault,\
 (CFStringRef)base64ElementStr,NULL,CFSTR("!*'();:@&=+$,/?%#[]"),kCFStringEncodingUTF8));


 //拼接好URL字符串
 NSString * urlStr = [NSString stringWithFormat:@"%@%@%@%@",Url_Header,CreateIdeaUrl,DataCodeUrl,base64ElementStr];
 //需要以“UTF-8”编码格式，进行请求
 urlStr = [urlStr stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet characterSetWithCharactersInString:urlStr]];

 //单例类 网请
 [NetRequest_Shared POSTChineseUrl:urlStr parameters:nil success:^(id _Nullable responseObject) {
            NSLog(@"%@",responseObject);

  } failure:^(NSError * _Nonnull error)  {
            NSLog(@"%@",error);
            NSLog (@"operation: %@",[error localizedDescription] );

  } ];

就这鬼问题，搞了很多天！还好项目不赶，找问题找好久！ 网请步骤：数据字典 —— json字符串 —— base64加密 —— 拼接为URL —— Post请求

出错的地方在于使用了(三方库)GTMBase64进行base64加密后，忘记处理 base64转码后的不规则字符！！ 还一直以为是json格式问题！😂😂😂😂😂😂😂

（2017.09.27）

goyohol's essay