iOS上的PHP空TMP_NAME上传图片 [英] PHP empty TMP_NAME on iOS Upload Image

问题描述

我目前正在开发一个iOS项目，该项目要求用户将图像上传到服务器.

I am currently developing an iOS project that requests the user to upload an image to the server.

我目前在Objective-C的班级中有以下代码:

I currently have this code in my class in Objective-C:

        NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
        [request setHTTPShouldHandleCookies:NO];
        [request setTimeoutInterval:60];
        [request setHTTPMethod:@"POST"];
        NSString *boundary = @"------VohpleBoundary4QuqLuM1cE5lMwCy";
        NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundary];
        [request setValue:contentType forHTTPHeaderField: @"Content-Type"];

        NSMutableData *body = [NSMutableData data];
        NSMutableDictionary *parameters = [[NSMutableDictionary alloc] init];
        [parameters setValue:[SSKeychain passwordForService:@"ID" account:@"SpotterBike"] forKey:@"ID"];

        for (NSString *param in parameters) {
            [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
            [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n", param] dataUsingEncoding:NSUTF8StringEncoding]];
            [body appendData:[[NSString stringWithFormat:@"%@\r\n", [parameters objectForKey:param]] dataUsingEncoding:NSUTF8StringEncoding]];
        }

        NSString *FileParamConstant = @"uploadedfile";
        NSData *imageData = UIImageJPEGRepresentation(image, 1);

        if (imageData){
            [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
            [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"image.jpg\"\r\n", FileParamConstant] dataUsingEncoding:NSUTF8StringEncoding]];
            [body appendData:[@"Content-Type:image/jpeg\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
            [body appendData:imageData];
            [body appendData:[[NSString stringWithFormat:@"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
        }

        [body appendData:[[NSString stringWithFormat:@"--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
        [request setHTTPBody:body];
        [request setURL:[NSURL URLWithString:@"http://212.92.57.155/App/UploadImage.php"]];

但是，尽管服务器接收到该图像，但是我无法对其进行处理以进一步使用它.如您所见，tmp_name为空，所以我无法将图像移至目录.

However, although the server recieves the image, I am not able to process it for further usage in it. As you see, tmp_name is empty, so I am not able to move the image to the directory.

print_r($_FILES['uploadedfile']);

(
    [name] => image.jpg
    [type] => 
    [tmp_name] => 
    [error] => 1
    [size] => 0
)

为什么会这样?

推荐答案

只要有人遇到相同的问题，经过几天的研究，我就发现了问题.

Just in case someone is facing the same problem, after some days of research, I have found the problem.

这些图片是通过3G移动连接上传的，因此，在开始上传直到完成之前，beetwen有一定的延迟.

The images were uploaded with 3G mobile connections, as a result, there was certain amount of delay in beetwen the time the upload started until it finished.

由于MAX_REQUEST_TIMEOUT属性的值较低，因此在超出MAX_REQUEST_TIMEOUT之前图像无法到达服务器，因此上载被中止.

Due the fact that, the MAX_REQUEST_TIMEOUT property had a low value, the image was not able to reach the server before the MAX_REQUEST_TIMEOUT exceeded, so the upload was aborted.

希望有帮助！

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