[英]Uploading selected image from photo library using AFNetworking and PHP
我正在嘗試使用AFNetworking上傳從照片庫中選擇的圖像,但我有點困惑。 一些代碼示例直接使用圖像數據進行上傳,而另一些則使用文件路徑。 我想在這里使用AFNetworking示例代碼:
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];
但是我不知道如何獲取從照片庫中選擇的圖像路徑。 誰能告訴我如何從照片庫中獲取我選擇的圖像的路徑?
編輯1:
好! 我已經找到以下路徑解決方案:
NSString *path = [NSTemporaryDirectory()
stringByAppendingPathComponent:@"upload-image.tmp"];
NSData *imageData = UIImageJPEGRepresentation(originalImage, 1.0);
[imageData writeToFile:path atomically:YES];
[self uploadMedia:path];
現在仍然很困惑,因為我已經為服務器上的上傳圖像創建了一個文件夾。 但是,AFNetworking將如何在不訪問任何service.php頁面的情況下將此圖像上傳到我的文件夾。 僅http://example.com/upload就足夠了嗎? 當我嘗試上傳時,出現以下錯誤:
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}
編輯2:
好。 我設法用以下代碼解決了錯誤:
-(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];
}
我在服務器端使用以下PHP代碼上傳文件:
<?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: " . $e->getMessage(), 3, "php2.log");
}
?>
編輯3:
現在,我了解了$ _FILES的工作原理。 但是,當我運行代碼時,卻收到成功消息,但是文件沒有上傳到服務器。 知道有什么問題嗎?
Afnetworking具有通過分段發布的上傳方法。
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是:
UIImage *originalImage = [info objectForKey:UIImagePickerControllerOriginalImage];
NSData *imageData = UIImageJPEGRepresentation(originalImage, 1.0);
使用以下代碼
- (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);
}];
}
盡管還有其他上傳圖片的方法,但是如果您想使用您描述的方法,那么在選擇圖片后,您可以獲取其網址,如下所示:
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
NSURL *imageURL = [info valueForKey:UIImagePickerControllerReferenceURL];
}
假設您使用UIImagePickerController
選擇圖像。
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