Question

我正在尝试使用AFNetworking上传从照片库中选择的图像，但我很困惑。一些代码示例直接使用图像数据进行上载，一些使用文件路径。我想在这里使用AFNetworking示例代码：

NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration 

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

NSURL *URL = [NSURL URLWithString:@"http://example.com/upload"];
NSURLRequest *request = [NSURLRequest requestWithURL:URL];

NSURL *filePath = [NSURL fileURLWithPath:@"file://path/to/image.png"];
NSURLSessionUploadTask *uploadTask = [manager uploadTaskWithRequest:request fromFile:filePath progress:nil completionHandler:^(NSURLResponse *response, id responseObject, NSError *error) {
    if (error) {
        NSLog(@"Error: %@", error);
    } else {
        NSLog(@"Success: %@ %@", response, responseObject);
    }
}];
[uploadTask resume];

但我不知道如何获得从照片库中选择的图像路径。谁能告诉我怎样才能获得从照片库中选择的图像路径？

编辑1：
好！我找到了以下路径解决方案：

NSString *path = [NSTemporaryDirectory()
                      stringByAppendingPathComponent:@"upload-image.tmp"];
NSData *imageData = UIImageJPEGRepresentation(originalImage, 1.0);
[imageData writeToFile:path atomically:YES];
[self uploadMedia:path];

现在我仍然感到困惑因为我在我的服务器上为上传的图像创建了一个文件夹。但AFNetworking如何将此图像上传到我的文件夹而不访问任何service.php页面。只需http://example.com/upload就够了吗？当我尝试上传时，我收到以下错误：

Error:
Error Domain=kCFErrorDomainCFNetwork
Code=303 "The operation couldn’t be completed. (kCFErrorDomainCFNetwork error 303.)"
UserInfo=0x1175a970 {NSErrorFailingURLKey=http://www.olcayertas.com/arendi,
    NSErrorFailingURLStringKey=http://www.olcayertas.com/arendi}

编辑2：
好。我已设法通过以下代码解决错误：

-(void)uploadMedia:(NSString*)filePath {
    NSURLSessionConfiguration *configuration =
    [NSURLSessionConfiguration defaultSessionConfiguration];

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

    manager.responseSerializer = [AFHTTPResponseSerializer serializer];

    NSURL *requestURL = 
        [NSURL URLWithString:@"http://www.olcayertas.com/fileUpload.php"];
    NSMutableURLRequest *request = 
        [NSMutableURLRequest requestWithURL:requestURL];

    [request setHTTPMethod:@"POST"];

    NSURL *filePathURL = [NSURL fileURLWithPath:filePath];

    NSURLSessionUploadTask *uploadTask =
        [manager uploadTaskWithRequest:request
                      fromFile:filePathURL progress:nil
             completionHandler:^(NSURLResponse *response, id responseObject, NSError *error) {
                 if (error) {
                     NSLog(@"Error: %@", error);
                 } else {
                     NSLog(@"Success: %@ %@", response, responseObject);
                 }
             }];

    [uploadTask resume];
}

我在服务器端使用以下PHP代码上传文件：

<?php header('Content-Type: text/plain; charset=utf-8');

try {

    // Undefined | Multiple Files | $_FILES Corruption Attack
    // If this request falls under any of them, treat it invalid.
    if (!isset($_FILES['upfile']['error']) ||
        is_array($_FILES['upfile']['error'])) {
        throw new RuntimeException('Invalid parameters.');
        error_log("File Upload: Invalid parameters.", 3, "php2.log");
    }

    // Check $_FILES['upfile']['error'] value.
    switch ($_FILES['upfile']['error']) {
        case UPLOAD_ERR_OK:
            break;
        case UPLOAD_ERR_NO_FILE:
            throw new RuntimeException('No file sent.');
            error_log("File Upload: No file sent.", 3, "php2.log");
        case UPLOAD_ERR_INI_SIZE:
        case UPLOAD_ERR_FORM_SIZE:
            throw new RuntimeException('Exceeded filesize limit.');
            error_log("File Upload: Exceeded filesize limit.", 3, "php2.log");
        default:
            throw new RuntimeException('Unknown errors.');
            error_log("File Upload: Unknown errors.", 3, "php2.log");
    }

    // You should also check filesize here.
    if ($_FILES['upfile']['size'] > 1000000) {
        throw new RuntimeException('Exceeded filesize limit.');
        error_log("File Upload: Exceeded filesize limit.", 3, "php2.log");
    }

    // DO NOT TRUST $_FILES['upfile']['mime'] VALUE !!
    // Check MIME Type by yourself.
    $finfo = new finfo(FILEINFO_MIME_TYPE);
    if (false === $ext = array_search(
        $finfo->file($_FILES['upfile']['tmp_name']),
        array(
            'jpg' => 'image/jpeg',
            'png' => 'image/png',
            'gif' => 'image/gif',
        ), true)) {
        throw new RuntimeException('Invalid file format.');
        error_log("File Upload: Invalid file format.", 3, "php2.log");
    }

    // You should name it uniquely.
    // DO NOT USE $_FILES['upfile']['name'] WITHOUT ANY VALIDATION !!
    // On this example, obtain safe unique name from its binary data.
    if (!move_uploaded_file($_FILES['upfile']['tmp_name'], sprintf('./uploads/%s.%s', sha1_file($_FILES['upfile']['tmp_name']), $ext))) {
        throw new RuntimeException('Failed to move uploaded file.');
        error_log("File Upload: Failed to move uploaded file.", 3, "php2.log");
    }

    echo 'File is uploaded successfully.';
    error_log("File Upload: File is uploaded successfully.", 3, "php2.log");

} catch (RuntimeException $e) {
    echo $e->getMessage();
    error_log("File Upload: " . $e->getMessage(), 3, "php2.log");
}

?>

编辑3：
现在我已经了解了$ _FILES的工作原理。然而，当我运行我的代码时，我收到成功消息，但文件没有上传到服务器。知道什么可能是错的吗？

Answer 1

Afnetworking通过多部分帖子提供上传方法。

NSMutableURLRequest *request = [httpClient multipartFormRequestWithMethod:@"POST" path:@"/v1/api" parameters:parameters constructingBodyWithBlock: ^(id <AFMultipartFormData>formData) {
    [formData appendPartWithFileData:imageData name:@"filename" fileName:@"file.jpg" mimeType:@"image/jpeg"];
}];

其中imageData为：

UIImage *originalImage = [info objectForKey:UIImagePickerControllerOriginalImage];
NSData *imageData = UIImageJPEGRepresentation(originalImage, 1.0);

Answer 2

使用以下代码

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
[picker dismissViewControllerAnimated:YES completion:nil];
UIImage *image = info[UIImagePickerControllerOriginalImage];
NSMutableDictionary *parameters = [[NSMutableDictionary alloc]init];
[parameters setObject:@"imageUploaing" forKey:@"firstKey"];
NSString *fileName = [NSString stringWithFormat:@"%ld%c%c.jpg", (long)[[NSDate date] timeIntervalSince1970], arc4random_uniform(26) + 'a', arc4random_uniform(26) + 'a'];

AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
NSData *data = UIImageJPEGRepresentation(image, 0.5);
[manager POST:@"http://example.com/resources.json" parameters:parameters constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
    [formData appendPartWithFileData:data name:@"image" fileName:fileName mimeType:@"image/jpeg"];
} success:^(AFHTTPRequestOperation *operation, id responseObject) {
    NSLog(@"Success: %@", responseObject);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
    NSLog(@"Error: %@", error);
}];

}

Answer 3

虽然还有其他上传图片的方法，但如果您想使用您描述的方法，那么在选择图片后，您可以获得如下网址：

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
    NSURL *imageURL = [info valueForKey:UIImagePickerControllerReferenceURL];
}

假设您使用UIImagePickerController来选择图片。

使用AFNetworking和PHP从照片库上传所选图像

3 个答案: