AFNetworking 3.x 多部分表单上传

Question

我有一个这样的上传表单：

<form action="http://localhost/upload.php" method="post" enctype="multipart/form-data">
    <input type="file" id="upload" name="upload" />
</form>

和php代码继续上传表单：

isset($_FILES["upload"]) or die("Error");
// Path prepare stuff
if (move_uploaded_file($_FILES["upload"]["tmp_name"], $outputFile)) {
    // Other processing stuffs
}

在 xcode 中，我像这样构造请求：

NSMutableURLRequest* request = [[AFHTTPRequestSerializer serializer]
                                multipartFormRequestWithMethod:@"POST"
                                URLString:@"http://localhost/upload.php"
                                parameters:nil
                              constructingBodyWithBlock:^(id<AFMultipartFormData>  _Nonnull formData) {
                                    [formData appendPartWithFormData:data name:@"somefilename.ext"];
                                } error:nil];

但是好像我做错了，对吧？

更新

我是 AFNetworking 的新手，我想了解它如何像上面那样构建 multiplart/form-data 帖子。看起来代码缺少输入名称“上传”，因此将无法通过第一行 php 上传脚本。我从 AFNetworking 的 GitHub 上阅读了该文档，但他们没有提及使用 NSData 构建表单数据，这里就是这种情况。

Answer 1

嗯，在AFNetworking 3.0你可以这样做上传多格式零件数据，Check this

AFNetworking 3.0 是 AFNetworking 的最新主要版本，3.0 删除了对现已弃用的基于 NSURLConnection 的 API 的所有支持。如果您的项目以前使用这些 API，建议您现在升级到基于 NSURLSession 的 API。本指南将引导您完成该过程。

NSMutableURLRequest *request = [[AFHTTPRequestSerializer serializer] multipartFormRequestWithMethod:@"POST" URLString:@"http://localhost/upload.php" parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {

   [formData appendPartWithFileData:data name:@"uploadFile" fileName:@"somefilename.txt" mimeType:@"text/plain"] // you file to upload

} error:nil];

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

NSURLSessionUploadTask *uploadTask;
uploadTask = [manager
          uploadTaskWithStreamedRequest:request
          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
                  [progressView setProgress:uploadProgress.fractionCompleted];
              });
          }
          completionHandler:^(NSURLResponse * _Nonnull response, id  _Nullable responseObject, NSError * _Nullable error) {
              if (error) {
                  NSLog(@"Error: %@", error);
              } else {
                  NSLog(@"%@ %@", response, responseObject);
              }
          }];

[uploadTask resume];

Answer 2

AFNetworking doc 关于多部分，声明您应该使用：

[[AFHTTPRequestSerializer serializer] multipartFormRequestWithMethod:@"POST"......

然后将NSURLSessionUploadTask 用于resume 方法（链接中的完整代码）。

我无法在我正在处理的 服务器 上使用此功能，而是使用了 AFHTTPSessionManager：

AFHTTPSessionManager *manager = [AFHTTPSessionManager alloc]initWithBaseURL: @"someURL..."];
// If you need to add few more headers, now is the time - if not you can skip this
[manager setRequestSerializer:[AFJSONRequestSerializer serializer]];
[[manager requestSerializer] setValue:@"your custom value"
                    forHTTPHeaderField:@"relevant key"];
// Setting basic auth - only if you need it
[[manager requestSerializer] setAuthorizationHeaderFieldWithUsername:@"username"
                                                             password:@"password"];


             [manager POST:@"appendedPath"
                parameters:params
 constructingBodyWithBlock:^(id<AFMultipartFormData>  _Nonnull formData) {

                   [formData appendPartWithFileData:yourNSDataFile
                                               name:@"file"
                                           fileName:@"customFileName"
                                           // The server I was working on had no type but you can google for all the existing types
                                           mimeType:@""];

             }

                 progress:nil
                  success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {

                                   if (responseObject != nil)
                                   {
                                       NSDictionary *jsonDictionary = responseObject;
                                   }
                               }

                   failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {

                                     // Handle your error
                               }];

Answer 3

如果你有一个大文件，你永远不会想这样做，因为它需要将整个文件加载到内存中。这是一种将文件从磁盘流式传输到 HTTP 请求的方法，这样您的内存使用率就会保持在较低水平。感谢您的原始答案！它就像一个魅力。

NSInputStream *fileInputStream = [[NSInputStream alloc] initWithFileAtPath:filePath];

if (!fileInputStream) {
    NSLog(Error, @"Could not get a fileInputStream from the file path");
    return;
}

NSError *error;

NSMutableURLRequest *request = [[AFHTTPRequestSerializer serializer] multipartFormRequestWithMethod:@"PUT" URLString:fullUrlStr parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {

    [formData appendPartWithInputStream:fileInputStream name:@"uniqueIdentifier" fileName:@"filename" length:<lengthOfFileLong>];

} error:&error];

if (error) {
    NSLog(Error, @"Error creating multipart form upload request: %@", [error userInfo]);
    completionHandler(nil, error);
}

[request setAllHTTPHeaderFields:headerDictionary];

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

NSURLSessionUploadTask *uploadTask;
uploadTask = [manager
              uploadTaskWithStreamedRequest:request
              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

                  NSLog(Debug, @"Cloud Upload Completion: %f", uploadProgress.fractionCompleted);
              }
              completionHandler:^(NSURLResponse * _Nonnull response, id  _Nullable responseObject, NSError * _Nullable error) {

                  if (error) {
                      NSLog(@"Error: %@", [error userInfo]);
                      completionHandler(nil, error);
                  } else {
                      NSLog(@"Success: %@ %@", response, responseObject);
                  }
              }];

[uploadTask resume];