嗨,我有一个接受多部分对象的后端。我正在努力寻找将图像发布为多部分对象并将其作为参数传递给spring mvc控制器所涉及的方向/必要步骤。我在网上搜索了无数小时,但仍在努力掌握它。
基本上,我是ios开发人员,我们有一个spring后端。我需要将图像作为多部分对象发送,因为它需要作为参数存储在后端中。
我正在阅读有关AFNetworking
的信息,但我仍然不确定。后端是在设计应用程序之前创建的(后端被外包),所以现在我试图连接到那里。
如果需要,我可以提供更多信息。
我尝试了Anand K的以下代码,但现在在响应中得到HTTP Status 500
,这是:
Request processing failed;
nested exception is org.springframework.web.multipart.MultipartException:
The current request is not a multipart request
以及其他一些“垃圾”
基于Adnan Ks建议的新更新*
UIImage *image=[UIImage imageNamed:@"dub.png"];
NSData *imageData=UIImagePNGRepresentation(image);
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:[NSURL URLWithString:@"http://website.com/upload/uploadOneBook.app?userID=12345&uploadFile="]];
[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", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: attachment; name=\"attachement\"; filename=\"%@\";",@"Image.png" ] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[NSData dataWithData:imageData]];
[body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
// close form
[body appendData:[[NSString stringWithFormat:@"--%@--\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];
NSLog(@"returnString=%@",returnString);
并且returnString包含:
`HTTP Status 400 - Required MultipartFile parameter 'uploadFile' is not present
最佳答案
我选择了AFNetworking
,它有一个很好的多部分对象示例。
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
NSDictionary *parameters = @{@"foo": @"bar"};
NSURL *filePath = [NSURL fileURLWithPath:@"file://path/to/image.png"];
[manager POST:@"http://example.com/resources.json" parameters:parameters constructingBodyWithBlock:^(id<AFMultipartFormData> formData)
{
[formData appendPartWithFileURL:filePath name:@"image" error:nil];
} success:^(AFHTTPRequestOperation *operation, id responseObject) {
NSLog(@"Success: %@", responseObject);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(@"Error: %@", error);
}];