IOS开发 HTTP相关GET/POST请求

AFNetworking类库使用

AFNetworking都是异步请求。

GET请求

 NSString *url =URL;

 url = [url stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

 AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManagermanager];

 manager.requestSerializer = [AFJSONRequestSerializerserializer];

 manager.responseSerializer = [AFHTTPResponseSerializerserializer];//这个决定了下面responseObject返回的类型

 manager.responseSerializer.acceptableContentTypes = [NSSetsetWithObject:@"application/json"]; 

  //3.发送请求

 [manager GET:url

   parameters:nil

      success: ^(AFHTTPRequestOperation *operation,id responseObject) {              

              NSData *data = responseObject;

          }

       failure: ^(AFHTTPRequestOperation *operation,NSError *error) {

              NSLog(@"%@", error);

          }];

因为AFHTTPRequestOperationManager内调用的是AFHTTPRequestSerializer的接口，也可直接使用下方法：

 AFHTTPRequestSerializer *request = [AFHTTPRequestSerializernew];

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

 NSMutableURLRequest *requestGet = [requestrequestWithMethod:@"GET"URLString:url parameters:nilerror:nil];

 NSData *data = [NSURLConnectionsendSynchronousRequest:requestGetreturningResponse:nilerror:nil];

 NSDictionary *resdict = [NSJSONSerializationJSONObjectWithData:data 

 options:NSJSONReadingMutableContainers

   error:nil];

AFHTTPRequestSerializer这种方法对POST请求好像没用，请求总失败，可能是因为没有AFHTTPResponseSerializer序列化的原因。也许是我写的代码不对。

POST请求

NSString *requestUrl = URL;

requestUrl = [requestUrl stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

NSMutableDictionary *requestData = [NSMutableDictionary dictionaryWithCapacity:XX];

...

AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManagermanager];

manager.requestSerializer = [AFJSONRequestSerializerserializer];

manager.responseSerializer = [AFHTTPResponseSerializerserializer];//这个决定了下面responseObject返回的类型

manager.responseSerializer.acceptableContentTypes = [NSSetsetWithObject:@"application/json"]; 

//3.发送请求

[managerPOST:requestUrl

  parameters:requestData

     success: ^(AFHTTPRequestOperation *operation,id responseObject) {        

       NSData *data = responseObject;     

    }

      failure: ^(AFHTTPRequestOperation *operation,NSError *error) {

       NSLog(@"%@", error);

    }];

ASIHTTPRequest类库使用

同步GET请求

NSURL *dataURL=[NSURLURLWithString:url];

ASIHTTPRequest *requestASI = [ASIHTTPRequestrequestWithURL:dataURL];

[requestASI setTimeOutSeconds:1.0f]; //设置请求超时时间

[requestASI addRequestHeader:@"Content-Type"value:@"application/json"];

[requestASI setRequestMethod:@"GET"];

[requestASI setPostBody:nil];

[requestASI startSynchronous];

   

 NSError *error = [requestASIerror];

 if (!error)

 {

      NSData *data = [requestASI responseData];

      NSDictionary *resdict = [NSJSONSerializationJSONObjectWithData:data      options:NSJSONReadingMutableContainerserror:nil];

 }

同步POST请求

NSMutableDictionary *requestData = [NSMutableDictionary dictionaryWithCapacity:XX];

...

NSData *postData = [NSJSONSerializationdataWithJSONObject:requestData

   options:NSJSONWritingPrettyPrinted 

     error: nil];

NSMutableData *tempJsonData = [NSMutableDatadataWithData:postData];

ASIHTTPRequest *request = [ASIHTTPRequestrequestWithURL:dataURL];

[request addRequestHeader:@"Content-Type"value:@"application/json"];

[request setTimeOutSeconds:1.0f];

[requestsetRequestMethod:@"POST"];

[requestsetPostBody:tempJsonData];

[request startSynchronous];

    

 NSError *error = [requesterror];

 if (!error)

 {

     NSData *data = [request responseData];

      NSDictionary *resdict = [NSJSONSerializationJSONObjectWithData:data      options:NSJSONReadingMutableContainerserror:nil];

  }

直接使用xcode提供的方法 NSMutableURLRequest

GET同步请求

NSMutableURLRequest*request = [NSMutableURLRequest new];

[request setURL:dataURL];

[request setHTTPMethod:@"GET"];

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

NSData *received = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];

NSDictionary *resDict = [NSJSONSerialization JSONObjectWithData:received options:NSJSONReadingMutableContainers error:nil];

POST同步请求

NSMutableDictionary *requestData = [NSMutableDictionary dictionaryWithCapacity:XX];

...

NSData *postData = [NSJSONSerialization dataWithJSONObject:requestData

   options:NSJSONWritingPrettyPrinted 

     error: nil];

NSMutableURLRequest *requestPOST =  [NSMutableURLRequest new];

[requestPOSTsetURL:dataURL];

[requestPOSTsetHTTPMethod:@"POST"];

[requestPOST setValue:@"application/json"forHTTPHeaderField:@"Content-Type"];

[requestPOSTsetHTTPBody:postData];

 NSData *received = [NSURLConnectionsendSynchronousRequest:requestPOST returningResponse:nilerror:nil];

 NSDictionary *resDict = [NSJSONSerializationJSONObjectWithData:received options:NSJSONReadingMutableContainerserror:nil];