如何发送图像和领域通过POST

Question

，形成我有这样的形式：

<form id="form" action="/post" method="POST" enctype="multipart/form-data"> 
    <input type="file" name="image" /> 
    <input type="text" name="name1" /> 
    <input type="text" name="name2" /> 
    <textarea name="text"></textarea> 
    <input type="text" name="name3" /> 
</form> 

而且我有一个方法是这样的：

- (void)sendFields { 

UIImage *tempImage = imageViewToPost.image; 

NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init]; 
[request setHTTPMethod:@"POST"]; 
[request setURL:[NSURL URLWithString:@"http://url/post/"]]; 


NSString *boundary = @"------------0xKhTmLbOuNdArY"; 
NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary]; 
[request addValue:contentType forHTTPHeaderField: @"Content-Type"]; 



NSMutableData *body = [NSMutableData data]; 
[body appendData:[[NSString stringWithFormat:@"\r\n%@\r\n",boundary] dataUsingEncoding:NSASCIIStringEncoding]]; 


[body appendData:[@"Content-Disposition: form-data; name=\"image\"; filename=\"photo.png\"\r\n" dataUsingEncoding:NSASCIIStringEncoding]]; 
[body appendData:[@"Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSASCIIStringEncoding]]; 
[body appendData:[NSData dataWithData:UIImageJPEGRepresentation(tempImage, 90)]]; 
[body appendData:[[NSString stringWithFormat:@"\r\n%@\r\n",boundary] dataUsingEncoding:NSASCIIStringEncoding]]; 

[body appendData:[@"Content-Disposition: form-data; name=\"name1\"\r\n\r\n" dataUsingEncoding:NSASCIIStringEncoding]]; 
[body appendData:[nameToPost dataUsingEncoding:NSUTF8StringEncoding]]; 

[body appendData:[@"Content-Disposition: form-data; name=\"name2\"\r\n\r\n" dataUsingEncoding:NSASCIIStringEncoding]]; 
[body appendData:[priceToPost dataUsingEncoding:NSUTF8StringEncoding]]; 

[body appendData:[@"Content-Disposition: form-data; name=\"text\"\r\n\r\n" dataUsingEncoding:NSASCIIStringEncoding]]; 
[body appendData:[commentToPost dataUsingEncoding:NSUTF8StringEncoding]]; 

[body appendData:[@"Content-Disposition: form-data; name=\"name3\"\r\n\r\n" dataUsingEncoding:NSASCIIStringEncoding]]; 
[body appendData:[coordsToPost dataUsingEncoding:NSUTF8StringEncoding]]; 


[body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSASCIIStringEncoding]]; 
[request setHTTPBody:body]; 

NSError *error; 
NSURLResponse *response; 
NSData *result = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error]; 

NSString *aStr = [[[NSString alloc] initWithData:result encoding:NSASCIIStringEncoding] autorelease]; 

NSLog(@"Result: %@", aStr); 

[request release];  

} 

它不工作。这里有什么问题？

谢谢你们。

Answer 1

我建议看一下ASIHTTPRequest库。我已经成功发布了图片和数据。使用和设置非常简单。另外，已经是一个非常不错的异步模型内置的。

ASIHTTPRequest

Answer 2

我想分享一些适用于我的代码。

- (void)allSet { 
    //creating the url request: 
    NSURL *cgiUrl = [NSURL URLWithString:@"http://mysite.com/upload.php"]; 
    NSMutableURLRequest *postRequest = [NSMutableURLRequest requestWithURL:cgiUrl]; 

    NSString *stringBoundary = [NSString stringWithString:@"0194784892923"]; 
    NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",stringBoundary]; 
    [postRequest addValue:contentType forHTTPHeaderField: @"Content-Type"]; 

    NSData *imageData = UIImageJPEGRepresentation(self.thePicture.photo, 0.5); 

    //setting up the body: 
    NSMutableData *postBody = [NSMutableData data]; 
    [postBody appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]]; 
    [postBody appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"category\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]]; 
    [postBody appendData:[[NSString stringWithString:@"photos"] dataUsingEncoding:NSUTF8StringEncoding]]; 
    [postBody appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]]; 
    [postBody appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"format\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]]; 
    [postBody appendData:[[NSString stringWithString:@"JSON"] dataUsingEncoding:NSUTF8StringEncoding]]; 
    [postBody appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]]; 
    [postBody appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"title\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]]; 
    [postBody appendData:[[NSString stringWithString:thePicture.title] dataUsingEncoding:NSUTF8StringEncoding]]; 
    [postBody appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]]; 
    [postBody appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"description\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]]; 
    [postBody appendData:[[NSString stringWithString:thePicture.description] dataUsingEncoding:NSUTF8StringEncoding]]; 
    [postBody appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]]; 
    [postBody appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"latitude\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]]; 
    [postBody appendData:[[NSString stringWithFormat:@"%f", [thePicture.latitude floatValue]] dataUsingEncoding:NSUTF8StringEncoding]]; 
    [postBody appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]]; 
    [postBody appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"longitude\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]]; 
    [postBody appendData:[[NSString stringWithFormat:@"%f", [thePicture.longitude floatValue]] dataUsingEncoding:NSUTF8StringEncoding]]; 
    [postBody appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]]; 
    [postBody appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"photo\"; filename=\"%@.jpg\"\r\n", thePicture.title] dataUsingEncoding:NSUTF8StringEncoding]]; 
    [postBody appendData:[[NSString stringWithString:@"Content-Type: application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]]; 
    [postBody appendData:[NSData dataWithData:imageData]]; 
    [postBody appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]]; 

    //adding header information: 
    [postRequest setHTTPMethod:@"POST"]; 
    [postRequest setHTTPBody:postBody]; 

    // create the connection with the request 
    // and start loading the data 
    theConnection = [[NSURLConnection alloc] initWithRequest:postRequest delegate:self]; 
    [theConnection start]; 

    if (theConnection) { 
     // Create the NSMutableData that will hold 
     // the received data 
     // receivedData is declared as a method instance elsewhere 
     receivedData=[[NSMutableData data] retain]; 
    } else { 
     // inform the user that the download could not be made 
    } 
} 

艰难，我有我设置的界限和分离方式的问题@ “\ r \ n - ％@ - \ r \ n”。试试我的代码，也许我可以解决你的问题。

Answer 3

我用这个代码在我的应用程序和它的作品完美地帮助...

//create request 
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init]; 

//Set Params 
[request setHTTPShouldHandleCookies:NO]; 
[request setTimeoutInterval:60]; 
[request setHTTPMethod:@"POST"]; 

//Create boundary, it can be anything 
NSString *boundary = @"------VohpleBoundary4QuqLuM1cE5lMwCy"; 

// set Content-Type in HTTP header 
NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundary]; 
[request setValue:contentType forHTTPHeaderField: @"Content-Type"]; 

// post body 
NSMutableData *body = [NSMutableData data]; 

//Populate a dictionary with all the regular values you would like to send. 
NSMutableDictionary *parameters = [[NSMutableDictionary alloc] init]; 

[parameters setValue:param1 forKey:@"param1-name"]; 

[parameters setValue:param2 forKey:@"param2-name"]; 

[parameters setValue:param3 forKey:@"param3-name"]; 


// add params (all params are strings) 
for (NSString *param in parameters) { 
    [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]]; 
    [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n", param] dataUsingEncoding:NSUTF8StringEncoding]]; 
    [body appendData:[[NSString stringWithFormat:@"%@\r\n", [parameters objectForKey:param]] dataUsingEncoding:NSUTF8StringEncoding]]; 
} 

NSString *FileParamConstant = @"imageParamName"; 

NSData *imageData = UIImageJPEGRepresentation(imageObject, 1); 

//Assuming data is not nil we add this to the multipart form 
if (imageData) 
{ 
    [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]]; 
    [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"image.jpg\"\r\n", FileParamConstant] dataUsingEncoding:NSUTF8StringEncoding]]; 
    [body appendData:[@"Content-Type:image/jpeg\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]]; 
    [body appendData:imageData]; 
    [body appendData:[[NSString stringWithFormat:@"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]]; 
} 

//Close off the request with the boundary 
[body appendData:[[NSString stringWithFormat:@"--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]]; 

// setting the body of the post to the request 
[request setHTTPBody:body]; 

// set URL 
[request setURL:[NSURL URLWithString:baseUrl]]; 

[NSURLConnection sendAsynchronousRequest:request 
            queue:[NSOperationQueue mainQueue] 
         completionHandler:^(NSURLResponse *response, NSData *data, NSError *error) { 

          NSHTTPURLResponse* httpResponse = (NSHTTPURLResponse*)response; 

          if ([httpResponse statusCode] == 200) { 

           NSLog(@"success"); 
          } 

         }];