在 iOS 中使用 NSURLConnection 请求表单数据

Form Data Request using NSURLConnection in iOS

提问by NSCry

I want to make http form post using NSURLConnection in iOS. I have two form fields and one file upload option in an HTML form. When I am doing same thing using NSURLConnectionI am not getting a response.

我想在 iOS 中使用 NSURLConnection 制作 http 表单。我在 HTML 表单中有两个表单字段和一个文件上传选项。当我使用NSURLConnection我做同样的事情时，我没有得到回应。

NSString *urlString = @"http://url/test.php";
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:[NSURL URLWithString:urlString]];
[request setHTTPMethod:@"POST"];

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

NSMutableData *body = [NSMutableData data];
[body appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"file\"; filename=\"myphoto.png\"rn"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:@"Content-Type: application/octet-streamrnrn"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:filedata];
[body appendData:[[NSString stringWithFormat:@"&s=YL4e6ouKirNDgCk0xV2HKixt&hw=141246514ytdjadh"] dataUsingEncoding:NSUTF8StringEncoding]];
[request setHTTPBody:body];

NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];
NSLog(@"RETURNED:%@",returnString);

But when I use ASIHTTPRequestand write the following code it's working and I am getting a response.

但是当我使用ASIHTTPRequest并编写以下代码时，它正在工作并且我得到了响应。

ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:[NSURL URLWithString:@"http://url/test.php"]];
[request setPostValue:@"YL4e6ouKirNDgCk0xV2HKixt&hw" forKey:@"ssf"];
[request setPostValue:@"141246514ytdjadh" forKey:@"sds"];
[request setData:filedata withFileName:@"myphoto.png" andContentType:@"image/jpeg"  forKey:@"file"];
[request startSynchronous];

NSError *error = [request error];
if (!error) {
    NSString *response = [request responseString];
    NSLog(@"response:%@",response);
}

Can anyone tell me what I'm doing wrong with the NSURLConnectionpart?

谁能告诉我我在这NSURLConnection部分做错了什么？

回答by dbrajkovic

You are not copying the example of that link. In that tutorial, the HTTPBody parameter is supposed to be an instance of NSData, not NSString.

您不是在复制该链接的示例。在该教程中，HTTPBody 参数应该是 NSData 的实例，而不是 NSString。

[request setHTTPMethod:@"POST"]; 
NSString *myString = [NSString stringWithFormat:@"value1=test3&value2=test"];
[request setHTTPBody:[myString dataUsingEncoding:NSUTF8StringEncoding]];

回答by Nikhil

I tried this code for uploading the image and its working. Added boundry.

我尝试使用此代码上传图像及其工作。添加了边界。

NSString *urlString = @"URL";

NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
[request setURL:[NSURL URLWithString:urlString]];
[request setHTTPMethod:@"POST"];

NSString *boundary = @"---------------------------14737809831466499882746641449";
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:NSUTF8StringEncoding]];
[body appendData:[@"Content-Disposition: form-data; name=\"userfile\"; filename=\"Test.png\"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[NSData dataWithData:imageData]];
[body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[request setHTTPBody:body];

NSData *returnData = [NSURLConnection  sendSynchronousRequest:request returningResponse:nil error:nil];
NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];

回答by Abhilash Reddy kallepu

This is working fine for me.

这对我来说很好用。

 - (void)viewDidLoad
{
    [super viewDidLoad];

    NSMutableURLRequest *req=[[NSMutableURLRequest alloc]initWithURL:[NSURL URLWithString:@"http:///URL/iinsert.php"]];

    NSString *myreqstr=@"name=abhii&address=knrr";
    NSData *myreqdata=[NSData dataWithBytes:[myreqstr UTF8String] length:[myreqstr length]];
    [req setHTTPMethod:@"POST"];

    [ req setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"content-type"];
    [ req setHTTPBody: myreqdata ];

    //[req setValue:@"abhii" forHTTPHeaderField:@"name"];
    //[req setValue:@"kar" forHTTPHeaderField:@"address"];
    NSData *data=[NSURLConnection sendSynchronousRequest:req returningResponse:nil error:nil];
    NSLog(@"%@",data);
    NSString *returnstring=[[NSString alloc]initWithData:data encoding:NSASCIIStringEncoding];
    NSLog(@"%@",returnstring);




    // Do any additional setup after loading the view, typically from a nib.
}

回答by Nikhil

Try this ....

尝试这个 ....

NSURL *url = [NSURL URLWithString:@"URL"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];

[request setHTTPMethod:@"POST"];


NSString *myRequestString =@"Request string";
NSLog(@"%@",myRequestString);
NSData *myRequestData = [ NSData dataWithBytes: [ myRequestString UTF8String ] length: [ myRequestString length ] ];

[ request setHTTPBody: myRequestData ];

NSURLResponse *response;
NSError *err;
NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&err];
NSString *content = [NSString stringWithUTF8String:[responseData bytes]];

回答by Borzh

You have several

你有几个

rn

in the end of your strings. All of them should be

在你的字符串的末尾。所有这些都应该是

\r\n

More precisely it should be:

更准确地说应该是：

[body appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"file\"; filename=\"myphoto.png\"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:@"Content-Type: application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];