Question

我必须将图片上传到特定网址。我必须遵循的规范是： 1.方法应该发布 2.必须使用多部分HTTP内容类型上载图像 3. HTTP字段的名称应为“uploadedTheFile”。 4.多部分数据shiuld有文件名。 5.图像内容类型应该是以下-jpeg，jpg，png，gif

我想异步使用NSURLConnection上传。我想我无法以正确的方式在请求中设置参数。我的状态代码为200，这表明我的NSURLConnection委托方法没有问题。我正在尝试的代码是：

NSString *stringBoundary=@"0xKhTmLbOuNdArY";
// create request
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:[NSURL URLWithString:url]];
[request setCachePolicy:NSURLRequestReloadIgnoringLocalCacheData];
[request setHTTPShouldHandleCookies:NO];
[request setTimeoutInterval:30];
[request setHTTPMethod:@"POST"];
[request setValue:[NSString stringWithFormat:@"multipart/form-data; boundary=%@",stringBoundary] forHTTPHeaderField:@"uploadfile"];


NSMutableData *postBody = [NSMutableData data];
NSData *imageData=UIImagePNGRepresentation([UIImage imageNamed:@"IMG_0215.JPG"]);

//[postBody appendData:imageData];
[postBody appendData:[@"Content-Disposition: form-data; name=\"data;filename=\"media.png\"\"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:[@"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]];

[request setHTTPBody:postBody];

NSURLConnection *connection = [NSURLConnection connectionWithRequest:request delegate:self];
if (connection) {
    self.data = [NSMutableData data];
}

Answer 1

我正在使用以下代码，它对我来说很好。

NSData *imageData = UIImageJPEGRepresentation(empImgView.image, 90); // convert image in NSData
    NSString *urlString = @"http://abc.com/saveimage/Default.aspx"; // your url

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

    NSString *imgNameString = [NSString stringWithFormat:@"Content-Disposition: form-data; name=\"userfile\"; filename=\"%@.jpg\"\r\n",[responseSrting substringWithRange:NSMakeRange(1, responseSrting.length - 2)]];    
    [body appendData:[[NSString stringWithString:imgNameString] 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]];
    [request setHTTPBody:body];

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

    NSLog(@"%@",returnString);

Answer 2

在这里，您可以了解如何使用afnetworking上传图片

https://github.com/AFNetworking/AFNetworking/wiki/AFNetworking-FAQ

Answer 3

您可以使用AFNetworking（它是开源的），这是对我有用的代码。这是针对AFNetworking 3.0版本。

NSString *serverUrl = [NSString stringWithFormat:@"http://www.yoursite.com/uploadlink", profile.host];
NSMutableURLRequest *request = [[AFHTTPRequestSerializer serializer] requestWithMethod:@"POST" URLString:serverUrl parameters:nil error:nil];


NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration];


manager.responseSerializer = [AFHTTPResponseSerializer serializer];

NSURL *filePath = [NSURL fileURLWithPath:[url path]];
NSURLSessionUploadTask *uploadTask = [manager uploadTaskWithRequest:request fromFile:filePath progress:^(NSProgress * _Nonnull uploadProgress) {
// This is not called back on the main queue.
// You are responsible for dispatching to the main queue for UI updates
     dispatch_async(dispatch_get_main_queue(), ^{
                //Update the progress view
                LLog(@"progres increase... %@ , fraction: %f", uploadProgress.debugDescription, uploadProgress.fractionCompleted);
            });
        } completionHandler:^(NSURLResponse *response, id responseObject, NSError *error) {
            if (error) {
                NSLog(@"Error: %@", error);
            } else {
                NSLog(@"Success: %@ %@", response, responseObject);
            }
        }];
[uploadTask resume];

如何使用post请求异步上传图片到网址？

3 个答案: