Question

我想以png格式将图像上传到服务器。我必须为请求提供三个参数

transactionID: (any random integer)
signatureBytes:data:image/png;base64,iVBORw0KGgoAAAsdffsdfsdfsdfsdfYAAAAeGRPoAAAgAElEQVR4nO2de5BmRXnGHzWmYkKVKUqJRk0erwerrwds55/lVnT/mm+87/Z4+3f30+/YN6D9L48CMA9VxnOJ9S
guid: CAD1CBE7-B5A4-43d6-BCDD-89B16F97E3C4

我使用过代码：

NSData *imageData = UIImageJPEGRepresentation(image.image,90);

// setting up the URL to post to


NSString *urlString=@"http://www.riverport.net/icalibur/dev/signature.ashx";

// setting up the request object now
NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
[request setURL:[NSURL URLWithString:urlString]];
[request setHTTPMethod:@"POST"];

    NSString *boundary = [NSString stringWithString:@"---------------------------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:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"transactionID\"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[[NSString stringWithString:@"7" intva] dataUsingEncoding:NSUTF8StringEncoding]];


  [body appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"signatureBytes\"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:@"data:image/png;base64,iVBUaBCrFDXGSIECEXEFdUFEhEVAluXmsrrtrrttrrqddcsvrgergergg/YN6D9L4uozc5h+nsWsFhGSn88CWAAwqV2ynoz1qvJjYTmfCOk1QxJ0ANgHijoZDy8CMA9VxnOJ9S"] dataUsingEncoding:NSUTF8StringEncoding]];


[body appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"guid\"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:@"CHJ78G-B5A4-43d6-BCDD-CFG567FGJ"] dataUsingEncoding:NSUTF8StringEncoding]];


[body appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"userfile\"; filename=\"ipodfile.png\"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:@"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]];
// setting the body of the post to the reqeust
[request setHTTPBody:body];


NSString* returns= [[NSString alloc] initWithData:body encoding:NSUTF8StringEncoding];



//NSLog(@"body %@",stri);


// now lets make the connection to the web
NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];

NSLog(returnString);

来自服务器的响应是：

[FormatException: Input string was not in a correct format.]
   Microsoft.VisualBasic.CompilerServices.Conversions.ParseDouble(String Value, NumberFormatInfo NumberFormat) +201
   Microsoft.VisualBasic.CompilerServices.Conversions.ToInteger(String Value) +66

[InvalidCastException: Conversion from string &quot;����

有任何人知道可能是什么问题。我不知道我做得对。

Answer 1

根据您收到的错误，我相信您没有为请求正确设置参数。

为什么不使用ASIHTTPRequest上传照片？它有一个ASIFormDataRequest类，你可以使用它来发出POST或GET请求，你可以很容易地添加参数。

here是使用ASIHTTPRequest上传图片的示例。

Answer 2

您没有正确格式化上传数据。帖子数据应如下所示：

--boundary
Content-Disposition: form-data; name="foo"

value-for-foo
--boundary
Content-Disposition: form-data; name="bar"

value-for-bar
--boundary
Content-Disposition: form-data; name="file"; filename="filename.ext"
Content-Type: application/whatever

file data
--boundary--

注意标题和字段值之间是否有空行（“\ r \ n \ r \ n”），值后面是一个crlf，下一个字段的标题之前是否重复边界。你的代码中没有这个，你的输出看起来更像是这样：

--boundary
Content-Disposition: form-data; name="foo"
value-for-fooContent-Disposition: form-data; name="bar"
value-for-barContent-Disposition: form-data; name="file"; filename="filename.ext"
Content-Type: application/whatever

file data--boundary--

Answer 3

嗨Pankaj 我不确定，但只是尝试使用outID和guide参数的图像NSData，你的代码似乎没问题。请让我知道结果。

Answer 4

您说要发布PNG图像，但是您要在代码段中获取JPEG表示。是否通过更改为 UIImagePNGRepresentation 来解决？

使用iPhone sdk以png格式上传图像

4 个答案: