如何使用数组作为标头和 AFNetworking 进行 POST答案

【问题标题】：How to make POST with array as header and AFNetworking如何使用数组作为标头和 AFNetworking 进行 POST
【发布时间】：2017-06-20 10:39:14
【问题描述】：

这是标题：

                "url": "{{host}}/images/bla",
            "method": "POST",
            "header": [
                {
                    "key": "Content-Type",
                    "value": "application/json",
                    "description": ""
                },
                {
                    "key": "Authorization",
                    "value": "Bearer token",
                    "description": ""
                }
            ],
            "body": { ... }

我尝试分两种情况解决：

案例 1（崩溃）：

NSDictionary *headerDict = @{@"key": @"Content-Type",
                                 @"value": @"application/json",
                                 @"description": @""};

NSDictionary *headerDict1 = @{@"key": @"Authorization",
                                 @"value": kBearerKey,
                                 @"description": @""};
NSArray *headerArray = @[headerDict, headerDict1];

[weakSelf.requestOperationManager.requestSerializer setValue:headerArray forHTTPHeaderField:@"header"];

案例 2（不会崩溃但也不起作用）：

weakSelf.requestOperationManager.requestSerializer = [AFHTTPRequestSerializer serializer];
[weakSelf.requestOperationManager.requestSerializer setValue:@"Content-Type" forHTTPHeaderField:@"key"];
[weakSelf.requestOperationManager.requestSerializer setValue:@"application/json" forHTTPHeaderField:@"value"];
[weakSelf.requestOperationManager.requestSerializer setValue:@"Authorization" forHTTPHeaderField:@"key"];
[weakSelf.requestOperationManager.requestSerializer setValue:kBearerKey forHTTPHeaderField:@"value"];

无论如何，在 案例 1 中会生成一个警告（并且也会导致崩溃），因为 setValue 应该是 NSString 而不是 NSArray。

【问题讨论】：

你需要将数组转换成json字符串： NSData *jsonData2 = [NSJSONSerialization dataWithJSONObject: headerArray options:NSJSONWritingPrettyPrinted error:&error]; NSString *jsonString = [[NSString alloc] initWithData:jsonData2 encoding:NSUTF8StringEncoding];
这是有效的，但问题是数据解释器在@"application/json" 中添加了一个“\”，它看起来像 @"application\/json" : (lldb) po headerString [ { " key”：“Content-Type”，“value”：“application\/json”，“description”：“”}，{“key”：“授权”，“value”：“Bearer xpkaVSckJSfCWzcXfODtiBu38B6mOMzPW....”， “描述”：“”}]

标签： ios objective-c json http-headers afnetworking

【解决方案1】：

例如，您可以将 NSMutableDictionary 中的所有标头值保留为键/值对

NSDictionary *headersDict = @{@"Content-Type": @"application/json",
                                  @"Authorization": kBearerKey };

然后你可以迭代键值并设置http头

[headersDict enumerateKeysAndObjectsUsingBlock:^(NSString *key, NSString *obj, BOOL *stop) {
        [requestManager.requestSerializer setValue:obj forHTTPHeaderField:key];
    }];

在您的情况下，您使用的是数组。您可以迭代数组并设置标头值，希望这会有所帮助。

for (NSDictionary *dict in headerArray) {

        NSString *key = [dict objectForKey:@"key"];
        NSString *value = [dict objectForKey:@"value"];

        [requestManager.requestSerializer setValue:value forHTTPHeaderField:key];
}

【讨论】：

【解决方案2】：

试试这个；

NSError *error;

NSData *jsonData = [NSJSONSerialization:headerArray options:NSJSONWritingPrettyPrinted error:&error];                                                                                 

NSString *jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];

[weakSelf.requestOperationManager.requestSerializer setValue:jsonString forHTTPHeaderField:@"header"];

【讨论】：

【解决方案3】：

试试这个：

AFNetworking 3

NSError *error;
NSData *jsonData = [NSJSONSerialization dataWithJSONObject: headerArray options:NSJSONWritingPrettyPrinted error:&error];
NSString *jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];

AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];

NSMutableURLRequest *req = [[AFJSONRequestSerializer serializer] requestWithMethod:@"POST" URLString:url parameters:nil error:nil];

req.timeoutInterval= [[[NSUserDefaults standardUserDefaults] valueForKey:@"timeoutInterval"] longValue];
[req setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
[req setValue:@"application/json" forHTTPHeaderField:@"Accept"];
[req setHTTPBody:[jsonString dataUsingEncoding:NSUTF8StringEncoding]];


NSURLSessionUploadTask *uploadTask;
uploadTask = [manager
              uploadTaskWithStreamedRequest:req
              progress:^(NSProgress * _Nonnull uploadProgress) {
                  dispatch_async(dispatch_get_main_queue(), ^{
                  });
              }
              completionHandler:^(NSURLResponse * _Nonnull response, id  _Nullable responseObject, NSError * _Nullable error) {
                  if (error) {
                      NSLog(@"Error: %@", [[NSString alloc]initWithData:[[error valueForKey:@"userInfo"] valueForKey:@"com.alamofire.serialization.response.error.data"] encoding:NSUTF8StringEncoding]);

                  } else {
                  }
              }];

[uploadTask resume];

【讨论】：

【解决方案4】：

NSDictionary *headerDict = @{@"Content-Type": @"application/json", @"Authorization": kBearerKey};

或

[weakSelf.requestOperationManager.requestSerializer setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
[weakSelf.requestOperationManager.requestSerializer setValue:kBearerKey forHTTPHeaderField:@"Authorization"];

【讨论】：

试试这个weakSelf.requestOperationManager.responseSerializer.acceptableContentTypes = [NSSet setWithObject:@"text/plain"];