IOS5开发-http get/post调用mvc4 webapi互操作(图片上传)

IOS5开发-http get/post调用mvc4 webapi互操作(图片上传)

 

目前最流行的跨平台交互是采用http协议通过JSON对象进行互操作。这种方式最简单，也很高效。webservice+xml的方式似乎已经过时。

下面是我做的一个例子

webapi的代码

 

public IEnumerable<Product> GetAllProducts()
{
Console.WriteLine(DateTime.Now.ToLongTimeString() + " : receive request.");
return new List<Product>
{
new Product() { Id = 1, Name = "Gizmo 1", Price = 1.99M },
new Product() { Id = 2, Name = "Gizmo 2", Price = 2.99M },
new Product() { Id = 3, Name = "Gizmo 3", Price = 3.99M },
new Product() { Id = 4, Name = "TShirt 3", Price = 5.99M },
new Product() { Id = 5, Name = "SOFT TSHIRT", Price = 34.99M },
};
}

public Product GetProductById(int id)
{
if (id < 1 || id > 3)
{
throw new HttpResponseException(System.Net.HttpStatusCode.NotFound);
}
return new Product()
{
Id = id,
Name = "Gizmo " + id.ToString(),
Price = id + 0.99M
};
}
// POST /api/Products
public Product Post(Product p)
{
Console.WriteLine(string.Format("submit Name:{0},Price:{1}",p.Name,p.Price));
return p;
}

// POST /api/Upload
public string Post()
{
Console.WriteLine(DateTime.Now.ToLongTimeString() + " : receive upload request.");
if (!Request.Content.IsMimeMultipartContent("form-data"))
{
throw new HttpResponseException(HttpStatusCode.UnsupportedMediaType);
}
MultipartFormDataStreamProvider streamProvider = new MultipartFormDataStreamProvider();

// Read the MIME multipart content using the stream provider we just created.
IEnumerable<HttpContent> bodyparts = Request.Content.ReadAsMultipartAsync(streamProvider).Result;

// The submitter field is the entity with a Content-Disposition header field with a "name" parameter with value "submitter"
//string submitter = "submitter";
//if (!bodyparts.TryGetFormFieldValue("submitter", out submitter))
//{
// submitter = "unknown";
//}

// Get a dictionary of local file names from stream provider.
// The filename parameters provided in Content-Disposition header fields are the keys.
// The local file names where the files are stored are the values.
IDictionary<string, string> bodyPartFileNames = streamProvider.BodyPartFileNames;

// Create response containing information about the stored files.
return bodyPartFileNames.Select(kv =>
{

FileInfo fileinfo = new FileInfo(kv.Value);
Console.WriteLine("receive file name:" + fileinfo.FullName + " Size:" + fileinfo.Length.ToString());
return new FileResult
{
FileName = kv.Key,
// LocalPath = fileinfo.FullName,
// LastModifiedTime = fileinfo.LastWriteTimeUtc,
// Length = fileinfo.Length,
// Submitter = submitter
};

//return FileResult;
}).ToList()[0].FileName;

 

public IEnumerable<Product> GetAllProducts()
        {
            Console.WriteLine(DateTime.Now.ToLongTimeString() +  "  : receive request. ");
             return  new List<Product> 
            {
                 new Product() { Id =  1, Name =  " Gizmo 1 ", Price =  1.99M },
                 new Product() { Id =  2, Name =  " Gizmo 2 ", Price =  2.99M },
                 new Product() { Id =  3, Name =  " Gizmo 3 ", Price =  3.99M },
                 new Product() { Id =  4, Name =  " TShirt 3 ", Price =  5.99M },
                 new Product() { Id =  5, Name =  " SOFT TSHIRT ", Price =  34.99M },
            };
        }

         public Product GetProductById( int id)
        {
             if (id <  1 || id >  3)
            {
                 throw  new HttpResponseException(System.Net.HttpStatusCode.NotFound);
            }
             return  new Product()
            {
                Id = id,
                Name =  " Gizmo  " + id.ToString(),
                Price = id +  0.99M
            };
        }
         //  POST /api/Products
         public Product Post(Product p)
        {
            Console.WriteLine( string.Format( " submit Name:{0},Price:{1} ",p.Name,p.Price));
             return p;
        }
        
  //  POST /api/Upload
         public  string Post()
        {
            Console.WriteLine(DateTime.Now.ToLongTimeString() +  "  : receive upload request. ");
             if (!Request.Content.IsMimeMultipartContent( " form-data "))
           {
                throw  new HttpResponseException(HttpStatusCode.UnsupportedMediaType);
            }
            MultipartFormDataStreamProvider streamProvider =  new MultipartFormDataStreamProvider();

             //  Read the MIME multipart content using the stream provider we just created.
            IEnumerable<HttpContent> bodyparts = Request.Content.ReadAsMultipartAsync(streamProvider).Result;

             //  The submitter field is the entity with a Content-Disposition header field with a "name" parameter with value "submitter"
             // string submitter = "submitter";
             // if (!bodyparts.TryGetFormFieldValue("submitter", out submitter))
             // {
             //     submitter = "unknown";
             // }

             //  Get a dictionary of local file names from stream provider.
             //  The filename parameters provided in Content-Disposition header fields are the keys.
             //  The local file names where the files are stored are the values.
            IDictionary< string,  string> bodyPartFileNames = streamProvider.BodyPartFileNames;

             //  Create response containing information about the stored files.
             return bodyPartFileNames.Select(kv =>
            {
              
                FileInfo fileinfo =  new FileInfo(kv.Value);
                Console.WriteLine( " receive file name: " + fileinfo.FullName +  "  Size: " + fileinfo.Length.ToString());
                 return  new FileResult
                {
                    FileName = kv.Key,
                    //  LocalPath = fileinfo.FullName,
                    //  LastModifiedTime = fileinfo.LastWriteTimeUtc,
                    //  Length = fileinfo.Length,
                    //  Submitter = submitter
                };
                
                 // return FileResult;
            }).ToList()[ 0].FileName;

webapi 返回的IEnumerable<Product> 或 IQueryable<Product> 支持odata协议，odata协议功能很强大，查询很方便。可以关注。

第一个是通过http get/post获取服务端数据和更新服务端数据。

 

 

代码获取数据代码

- (IBAction)getAction:( id)sender {
    NSString *urlstring=self.urlTextField.text;
    NSURL *url=[NSURL URLWithString:urlstring];
     // NSData *jsondata=[[NSData alloc]initWithContentsOfURL:url];
     // NSLog(@"data:%@",[[NSString alloc] initWithData:jsondata encoding:NSUTF8StringEncoding]);
    NSMutableURLRequest *request=[NSMutableURLRequest requestWithURL:url];
    NSOperationQueue *queue=[[NSOperationQueue alloc] init];
    [NSURLConnection sendAsynchronousRequest:request queue:queue
                           completionHandler:^(NSURLResponse *respone,
                                               NSData *data,
                                               NSError *error)
     {
          if ([data length]> 0 && error==nil) {
             NSString *jsonstring=[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
              // [self.respondTextView setText:jsonstring];
             NSLog( @" data:%@ ",jsonstring);
              // [self performSelectorOnMainThread:@selector(setRespondtext:)withObject:jsonstring waitUntilDone:YES modes:nil];
             [self performSelectorOnMainThread:@selector(setRespondtext:) withObject:data waitUntilDone:NO];
         }  
     }
     ];
    

}

post数据代码如下

 

- (IBAction)postAction:( id)sender {
    NSString *urlstring=self.urlTextField.text;
    NSString *poststr=self.requestTextView.text;
    
    NSURL *url=[NSURL URLWithString:urlstring];
    NSMutableURLRequest *request=[NSMutableURLRequest requestWithURL:url];
    [request addValue: @" application/json " forHTTPHeaderField: @" Content-Type "];
    [request setHTTPMethod: @" POST "];
    [request setHTTPBody:[poststr dataUsingEncoding:NSUTF8StringEncoding]];
    NSOperationQueue *queue=[[NSOperationQueue alloc] init];
    [NSURLConnection sendAsynchronousRequest:request queue:queue
                           completionHandler:^(NSURLResponse *respone,
                                               NSData *data,
                                               NSError *error)
     {
          if ([data length]> 0 && error==nil) {
             NSString *jsonstring=[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
              // [self.respondTextView setText:jsonstring];
             NSLog( @" data:%@ ",jsonstring);
              // [self performSelectorOnMainThread:@selector(setRespondtext:)withObject:jsonstring waitUntilDone:YES modes:nil];
             [self performSelectorOnMainThread:@selector(setRespondtext:) withObject:data waitUntilDone:NO];
         }  
     }
     ];    
    
    

}

 解析获取的JSON字符串

-( void) setRespondtext:(NSData *)data{
    NSString *text=[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
     id jsonObject=[NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:nil];
     if (jsonObject !=nil) {
        NSLog( @" Successfully deserialized... ");
         if ([jsonObject isKindOfClass:[NSDictionary  class]]) {
            NSDictionary *deserializedDic=(NSDictionary *)jsonObject;
            NSLog( @" Dersialized Json dictionary =%@ ",deserializedDic);
        }
         else  if([jsonObject isKindOfClass:[NSArray  class]]){
            NSArray *deserializedArray=(NSArray *)jsonObject;
            NSLog( @" Derialized json array = %@ ",deserializedArray);
             for (NSDictionary *item  in deserializedArray) {
                NSLog( @" Id : %@ Name: %@ Price : %@ ",[item objectForKey: @" Id "],[item objectForKey: @" Name "],[item objectForKey: @" Price "]);
            }
        } else{
            
        }
    }
    
    
    [self.respondTextView setText:text];

} 

 

 

图片上传的代码

 

- (IBAction)uploadAction:( id)sender {
    NSString *urlstring=self.urlTextField.text;
     // NSString *poststr=@"";
    NSData *imgData=UIImageJPEGRepresentation(self.previewImageView.image,  0.9f);
    
    NSString *boundary =  @" 0xKhTmLbOuNdArY ";  
    NSString *contentType = [NSString stringWithFormat: @" multipart/form-data; boundary=%@ ", boundary, nil];
    
    NSURL *url=[NSURL URLWithString:urlstring];
    NSMutableURLRequest *request=[NSMutableURLRequest requestWithURL:url];
    [request addValue:contentType forHTTPHeaderField: @" Content-Type "];
    [request setHTTPMethod: @" POST "];
    NSMutableData *body = [NSMutableData data];
    [body appendData:[[NSString stringWithFormat: @" \r\n--%@\r\n ", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithString: @" Content-Disposition: form-data; name=\ "userfile\ " ; filename=\"iphonefile.jpg\"\r\n "] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithString: @" Content-Type: application/octet-stream\r\n\r\n "] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[NSData dataWithData:imgData]];
    [body appendData:[[NSString stringWithFormat: @" \r\n--%@--\r\n ", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    
    [request setHTTPBody:body];
    NSOperationQueue *queue=[[NSOperationQueue alloc] init];
    [NSURLConnection sendAsynchronousRequest:request queue:queue
                           completionHandler:^(NSURLResponse *respone,
                                               NSData *data,
                                               NSError *error)
     {
          if ([data length]> 0 && error==nil) {
             NSString *jsonstring=[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
              // [self.respondTextView setText:jsonstring];
             NSLog( @" data:%@ ",jsonstring);
              // [self performSelectorOnMainThread:@selector(setRespondtext:)withObject:jsonstring waitUntilDone:YES modes:nil];
              // [self performSelectorOnMainThread:@selector(setRespondtext:) withObject:data waitUntilDone:NO];
         }  
     }
     ];    

}

 

我感觉使用ios sdk自带的NSMutableURLRequest,NSURLConnection, NSJSONSerialization,也非常方便，似乎没有必要去使用第三方的类库。