ios - 将NSData转换为NSString-NSLog限制

Question

我正在尝试在Zendesk中将NSData转换为NSString，但是得到的字符串不完整，或者至少无法完全解码data。

当我curl以下命令时:

curl https://mySubdomain.zendesk.com/api/v2/users/1038194884/tickets/requested.json   -v -u myLogin:myPassword

我得到正确的响应，它列出了该用户的所有票证，响应如下:

GMT 内容长度:12576 <连接:保持 Activity <
X-Zendesk-API版本:v2 X帧选项:SAMEORIGIN 剩余X速率限制:399 <严格传输安全性:
最大年龄= 31536000; <与X-UA兼容:IE = Edge，chrome = 1 “98b10cfcb2f1577122a1662926f9565c” <缓存控制:必须重新验证，
private ，最大年龄= 0 app2.pod7.fra1.zdsys.com db8b90fd-e3a3-452d-c5ea-ecf4bbd76e89 X机架缓存:丢失 X-Content-Type-Options:nosniff

当我尝试从 objective-C应用程序在 iOS中进行相同操作时，响应几乎相同，如下所示:

“Cache-Control” =“必须重新验证， private ，最大年龄= 0”；
连接=“保持 Activity ”；
“Content-Encoding” = gzip;
“Content-Type” =“应用程序/ json; charset = UTF-8”;
Date =“Sat，28 Jan 2017 20:36:38 GMT”;
Etag =“\” 98b10cfcb2f1577122a1662926f9565c \“”;“;
服务器= nginx;
“Strict-Transport-Security” =“最大年龄= 31536000;”;
“传输编码” =身份；
“X-Content-Type-Options” = nosniff;
“X-Frame-Options” = SAMEORIGIN;
“X-Rack-Cache” =未命中；
“X速率限制” = 400；
“剩余X速率限制” = 399；
“X-Request-Id” =“53c1b462-2dec-4c46-cc60-ecf4bbd76e89”；
“X-Runtime” =“0.209525”;
“X-UA-Compatible” =“IE = Edge，chrome = 1”;
“X-Zendesk-API-Version” = v2；
“X-Zendesk-Application-Version” =“v8.28”;
“X-Zendesk-Origin-Server” =“app4.pod7.fra1.zdsys.com”;
“X-Zendesk-Request-Id” = 675a​​e5b4ff78fbe7

问题是，当我尝试将 data转换为 dictionary或 NSString时，我得到了不完整的 string。这是我正在使用的代码:

NSString *urlUser = [NSString stringWithFormat:@"https://mySubdomain.zendesk.com/api/v2/users/1038194884/tickets/requested.json"];
    NSURL *url  = [[NSURL alloc] initWithString:urlUser];

    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];

    [request addValue : @"application/json"
   forHTTPHeaderField : @"Content-Type" ];

    NSString *authStr = @"username:password";
    NSData *authData = [authStr dataUsingEncoding:NSUTF8StringEncoding];
    NSString *authValue = [NSString stringWithFormat: @"Basic %@",[authData base64EncodedStringWithOptions:0]];
    [request setValue:authValue forHTTPHeaderField:@"Authorization"];

    NSURLSession *session = [NSURLSession  sharedSession];
    NSURLSessionDataTask *task = [session dataTaskWithRequest:request
                                            completionHandler:
                                  ^(NSData *data, NSURLResponse *response, NSError *error) {
                                      NSLog(@"finished");
                                      if (!error)
                                      {

                                          NSLog(@"%@", data);
                                          NSLog(@"RESPONSE: %@", response);

                                          NSLog(@"length: %lu", data.length);

                                          //Determine if string is null-terminated
                                          char lastByte;
                                          [data getBytes:&lastByte range:NSMakeRange([data length]-1, 1)];

                                          NSString *str;

                                          if (lastByte == 0x0) {
                                              //string is null-terminated
                                              str = [NSString stringWithUTF8String:[data bytes]];
                                          } else {
                                              //string is not null-terminated
                                              str = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
                                          }

                                          NSLog(@"string length: %lu", str.length);

                                          NSLog(@"%@", str);

                                          NSLog(@"stop");




                                      }

                                  }];
    [task resume];

顺便说一句， data的长度与 curl响应中的相同。

记录的字符串:

{“tickets”:[{“url”:“ https://mySubdomain.zendesk.com/api/v2/tickets/407.json”，“id”:407，“external_id”:null，“via”:{“channel”:“mobile_sdk”，“source”:{“from”:{ }，“to”:{}，“rel”:“mobile_sdk”}}，“created_at”:“2017-01-26T10:48:28Z”，“updated_at”:“2017-01-26T11:05:42Z” ，“type”:null，“subject”:“Comentário
sobreexercício。“，” raw_subject“:”Comentáriosobre
exercício。“，” description“:”正在使用时:bruna villete \ nObjectId:
qHQzNbjUzy \ nPlano:铁训练-巴西\ n \ n要进行锻炼的细节:
\ nTitulo:CADEIRA EXTENSORA \ nObjectId:qvq5deXxD9 \ nPerfil:MULHER
INICIANTE \nFerequência:5 \nPeríodo:Semana1 \nSérie:意甲
B \ n \nCOMENTÁRIO:
\ nbom”，“优先级”:null，“状态”:“已解决”，“收件人”:null，“requester_id”:1038194884，“submitter_id”:1038194884，“assignee_id”:3030446965，“organization_id”:null，“group_id” “:24989965，” collaborator_ids“:[]，” forum_topic_id“:null，” problem_id“:null，” has_incidents“:false，” is_public“:true，” due_at“:null，” tags“:[[seriecomment”] ，“custom_fields”:[]，“satisfaction_rating”:null，“sharing_agreement_

Answer 1

正如我在评论中告诉您的，看来NSLog语句切断了字符串。一切都按预期进行。

要处理您的数据，请将其转换为json对象并按以下方式使用它:

// convert the response data to json
NSError *error = nil;
NSDictionary *json = [NSJSONSerialization JSONObjectWithData:data options:0 error:&error];
if (!error) {
    NSLog(@"json parsing succeeded.");
}

// access your data
NSArray *tickets = json[@"tickets"];