使用 AFNetworking 进行简单的“PUT”文件上传

Question

我想这很简单，但我不知道该怎么做。我想使用 AFNetworking 库将文件上传到使用 PUT 请求的网络服务。这是我用来测试服务的 curl 命令

mac:~ user$ curl --verbose -T image.jpeg http://server.org:8001/social/test.jpg
* About to connect() to server.org port 8001 (#0)
*   Trying 123.45.123.123...
* connected
* Connected to server.org (123.45.123.123) port 8001 (#0)
> PUT /social/test.jpg HTTP/1.1
> User-Agent: curl/7.24.0 (x86_64-apple-darwin12.0) libcurl/7.24.0 OpenSSL/0.9.8r zlib/1.2.5
> Host: server.org:8001
> Accept: */*
> Content-Length: 78341
> Expect: 100-continue
> 
< HTTP/1.1 100 CONTINUE
< Server: cx1193719-b
< Content-Type: Text/Html
< Accept-Ranges: bytes
< Content-Length: 0
* We are completely uploaded and fine
< HTTP/1.1 200 OK
< Server: cx1193719-b
< Content-Type: Text/Html
< Accept-Ranges: bytes
< Content-Length: 0
< 
* Connection #0 to host server.org left intact
* Closing connection #0

我已经能够使用 POST 和表单数据将文件上传到其他 Web 服务，我使用了 PUT 请求（使用 AFHTTPClient 和 putPath），但我仍然不明白如何进行简单的文件上传。

感谢您的帮助！

Answer 1

djibouti33 的回答在我看来相当不错。但是，需要注意的一件事是，答案中的 multipartFormRequest 方法已被弃用。 AFNetworking 现在建议您使用：

- (NSMutableURLRequest *)multipartFormRequestWithMethod:(NSString *)method
                                              URLString:(NSString *)URLString
                                             parameters:(NSDictionary *)parameters
                              constructingBodyWithBlock:(void (^)(id <AFMultipartFormData> formData))block
                                                  error:(NSError *__autoreleasing *)error

这里需要注意的是，您需要通过执行以下操作通过引用传递错误：

NSError *requestError = nil;
NSMutableURLRequest *request = [manager.requestSerializer multipartFormRequestWithMethod:@"PUT" URLString:path parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
    [formData appendPartWithFileData:photoData name:@"file" fileName:@"image" mimeType:@"image/png"];
} error:&requestError];

Answer 2

我正在使用 AFNetworking 2.0 并且想知道同样的事情。这是我最终得到的结果：

// manager needs to be init'd with a valid baseURL
NSURL *baseURL = [AfarHTTPSessionManager sharedManager].baseURL;
AFHTTPRequestOperationManager *manager = [[AFHTTPRequestOperationManager alloc] initWithBaseURL:baseURL];

NSData *imageData = UIImageJPEGRepresentation(draftHighlight.largeImage, 1);

// need to pass the full URLString instead of just a path like when using 'PUT' or 'POST' convenience methods
NSString *URLString = [NSString stringWithFormat:@"%@%@", baseURL, _the_rest_of_your_path];
NSMutableURLRequest *request = [manager.requestSerializer multipartFormRequestWithMethod:@"PUT" URLString:URLString parameters:parameters constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
    [formData appendPartWithFileData:imageData name:kCreateHighlightAPIKeyImage fileName:@"highlight_image.jpg" mimeType:@"image/jpeg"];
}];

// 'PUT' and 'POST' convenience methods auto-run, but HTTPRequestOperationWithRequest just
// sets up the request. you're responsible for firing it.
AFHTTPRequestOperation *requestOperation = [manager HTTPRequestOperationWithRequest:request success:^(AFHTTPRequestOperation *operation, id responseObject) {
    // success
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
    // failure
}];

// fire the request
[requestOperation start];

Answer 3

这是 AFNetworking 常见问题解答的一部分。检查https://github.com/AFNetworking/AFNetworking/wiki/AFNetworking-FAQ。

此外，如果您使用的是 AFHTTPClient 的子类，您可能希望使用类似于以下内容的方式对其进行扩展：

- (void)putPath:(NSString *)path
     parameters:(NSDictionary *)parameters
           data:(NSData*)data
        success:(void (^)(AFHTTPRequestOperation *operation, id responseObject))success
        failure:(void (^)(AFHTTPRequestOperation *operation, NSError *error))failure;

如此答案中所建议：https://stackoverflow.com/a/9014768/634940。

实施后，您的 AFHTTPClient 子类的基本 URL 设置为 http://server.org，您可以继续调用：

NSData *imageData = [NSData dataWithContentsOfFile:pathToYourJPEGFile];
[client putPath:@"social/test.jpg"
     parameters:nil
           data:imageData
        success:yourSuccessBlock
        failure:yourFailureBlock];