Question

我想使用网络服务将选定的图像从图像查看器上传到服务器。

我的网络服务需要用户ID，密码和文件名作为请求。

但是当我运行时，我的文件名出错了。

错误说“程序需要未提供的文件名”。虽然我在这里传递文件名。

任何人都可以查看代码并让我知道，可能是什么问题？ - 谢谢。

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

//creating the url request:
NSURL *postUrl = [NSURL URLWithString:@"myURL"];
NSMutableURLRequest *postRequest = [NSMutableURLRequest requestWithURL:postUrl];

//adding header information:
[postRequest setHTTPMethod:@"POST"];
NSString *stringBoundary = [NSString stringWithString:@"0xKhTmLbOuNdArY"];
NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",stringBoundary];
[postRequest addValue:contentType forHTTPHeaderField: @"Content-Type"];

//setting up the body:
NSMutableData *postBody = [NSMutableData data];
[postBody appendData:[[NSString stringWithFormat:@"--%@\r\n",stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"userid\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:[[NSString stringWithString:@"100"] dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"pwd\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:[[NSString stringWithString:@"pwd"] dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"image\"; filename=\"1.jpg\"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:[[NSString stringWithString:@"Content-Type: image/jpg\r\n\r\n"] 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]];

[postRequest setHTTPBody:postBody];

// now lets make the connection to the web
NSData *returnData = [NSURLConnection sendSynchronousRequest:postRequest returningResponse:nil error:nil];

NSString *returnString;
returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];
lblLoginStatus.text = @"Uploading done.";

NSLog(@"%@",returnString);

Answer 1

在您的其他字段中，您的格式字符串中有两次\r\n，文件名条目中只有一次{{1}}。也许这就是问题所在。

Answer 2

试试这个：虽然它上传音频但应该以相同的方式工作。

NSArray  *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
        NSString *documentsDirectory = [paths objectAtIndex:0];
        destinationFilePath = [[NSString alloc] initWithFormat: @"%@/audio.mp3", documentsDirectory];
        progress.myLabel.text = @"Uploading file...";
        [self.view addSubview:progress.view];
        NSLog(@"will upload file: %@", destinationFilePath);
        NSString * text = captionText;
        //this one works
        // try this with dataWithContentOfURL
        NSData *audioData = [[NSData alloc] initWithContentsOfURL:fileURL];
        NSLog(@"File URL:%@",fileURL);

    NSString * urlString = @"urlstring"


    // 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"];


    NSArray *myArray = [destinationFilePath componentsSeparatedByString: @"/"];
    NSString *fileName = (NSString*)[myArray lastObject];

    NSMutableData *body = [NSMutableData data];
    [body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[@"Content-Disposition: form-data; name=\"action\"\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[@"upload" dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[@"Content-Disposition: form-data; name=\"code\"\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];

    NSString *strkCode = @"code";

    [body appendData:[[NSString stringWithFormat:@"%@", strkCode] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"userfile\"; filename=\"%@\"\r\n", fileName] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithString:@"Content-Type: application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[NSData dataWithData:audioData]];
    [body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];

    if (![text isEqualToString:@""]) {
        [body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
        [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n",@"caption"] dataUsingEncoding:NSUTF8StringEncoding]];

        [body appendData:[text dataUsingEncoding:NSUTF8StringEncoding]];
        [body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    }
    // setting the body of the post to the reqeust
    [request setHTTPBody:body];
    [audioData release];

    NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
    if (connection) {
        receivedData = [[NSMutableData data] retain];
    }
    else {
        NSLog(@"error connecting!");
    }
    [connection release];
}

将图像文件上载到服务器时出错

2 个答案: