使用 AFNetworking 将 .zip 文件上传到 REST 服务器失败答案

【问题标题】：Upload a .zip file to REST server using AFNetworking fails使用 AFNetworking 将 .zip 文件上传到 REST 服务器失败
【发布时间】：2014-05-28 00:08:22
【问题描述】：

从 AFNetworking 文档中，我尝试在 REST 服务器中上传文件时得到以下代码，该文件与其他客户端一起工作正常，但在我的实现中它因内部服务器错误而崩溃。

代码如下：

- (BOOL)uploadFile:(NSString *)path apiKey:(NSString *)apiKey
{
    NSData *symbolsData = [NSData dataWithContentsOfFile:path];

    if (!symbolsData) {
        NSLog(@"Symbols file at %@ does not exist.", path);
        return NO;
    }

    if ([symbolsData length] > 33554432) {
        NSLog(@"Symbols file at %@ is too large to upload.", path);
        return NO;
    }

    NSMutableURLRequest *request = [[AFHTTPRequestSerializer serializer] multipartFormRequestWithMethod:@"POST" URLString:[NSString stringWithFormat:@"%@/upload/thefile", BaseURL] parameters:nil constructingBodyWithBlock:
        ^(id<AFMultipartFormData> formData)
            {
            [formData appendPartWithFileData:symbolsData name:@"file" fileName:[path lastPathComponent] mimeType:@"application/zip"];
            }
        error:nil];
    [request setValue:apiKey forHTTPHeaderField:@"X-theapikey"];

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

    NSURLSessionUploadTask* uploadTask = [manager uploadTaskWithStreamedRequest:request progress:nil completionHandler:
        ^(NSURLResponse *response, id responseObject, NSError *error)
            {
            if (!error)
                {
                NSLog(@"Successfully uploade file: %@\r\nwith Response: %@", [path lastPathComponent], (NSString*)responseObject);
                }
            else
                {
                NSLog(@"There was an error while uploading the file: %@", [error description]);
                }
            }];

    [uploadTask resume];

    return YES;
}

错误：

There was an error while uploading file: Error Domain=NSURLErrorDomain Code=-1001 "The request timed out." UserInfo=0x6000000e8700 {NSUnderlyingError=0x60000005c0e0 "The request timed out.", NSErrorFailingURLStringKey=http://IP_ADDRESS:3000/upload/thefile, NSErrorFailingURLKey=http://IP_ADDRESS:3000/upload/thefile, NSLocalizedDescription=The request timed out.}

在互联网上搜索后，我看到了很多实现，MIME 类型更改为 application/octet-stream 和其他东西，但没有任何效果。

还添加了 AFNetworkActivityLogger 并注册到 NSNotificationCenter 以检查请求：

Request: <NSMutableURLRequest: 0x600000014680> { URL: http://IP_ADDRESS:3000/upload/thefile }
2014-05-28 03:03:16.112 MyMacApp[5092:303] POST 'http://IP_ADDRESS:3000/upload/thefile': {
    "Accept-Language" = "en;q=1, ja;q=0.9, fr;q=0.8, de;q=0.7, es;q=0.6, it;q=0.5";
    "Content-Length" = 817739;
    "Content-Type" = "multipart/form-data; boundary=Boundary+E25BB25240379DA8";
    "User-Agent" = "MyMacApp/1.1 (Mac OS X Version 10.9.3 (Build 13D65))";
    "X-thapikey" = 9e301234;
} (null)

我可以看到 Content-Type 看起来不错，并且有一个 Content-Length。

编辑： 抛出的服务器异常：

java.lang.NullPointerException
  at org.apache.commons.fileupload.MultipartStream$ItemInputStream.makeAvailable(MultipartStream.java:997)
  at org.apache.commons.fileupload.MultipartStream$ItemInputStream.read(MultipartStream.java:901)
  at java.io.InputStream.read(InputStream.java:101)
  at org.apache.commons.fileupload.util.Streams.copy(Streams.java:101)
  at org.apache.commons.fileupload.util.Streams.copy(Streams.java:70)
  at org.apache.commons.fileupload.MultipartStream.readBodyData(MultipartStream.java:589)
  at org.apache.commons.fileupload.MultipartStream.discardBodyData(MultipartStream.java:613)
  at org.apache.commons.fileupload.MultipartStream.skipPreamble(MultipartStream.java:630)
  at org.apache.commons.fileupload.FileUploadBase$FileItemIteratorImpl.findNextItem(FileUploadBase.java:1018)
  at org.apache.commons.fileupload.FileUploadBase$FileItemIteratorImpl.<init>(FileUploadBase.java:998)
  at org.apache.commons.fileupload.FileUploadBase.getItemIterator(FileUploadBase.java:310)
  at ring.middleware.multipart_params$file_item_seq.invoke(multipart_params.clj:39)
  at ring.middleware.multipart_params$parse_multipart_params.invoke(multipart_params.clj:55)
  at ring.middleware.multipart_params$multipart_params_request.doInvoke(multipart_params.clj:81)
  at clojure.lang.RestFn.invoke(RestFn.java:423)
  at ring.middleware.multipart_params$wrap_multipart_params$fn__853.invoke(multipart_params.clj:107)
  at ring.middleware.flash$wrap_flash$fn__1860.invoke(flash.clj:31)
  at ring.middleware.session$wrap_session$fn__1847.invoke(session.clj:85)
  at ring.middleware.json$wrap_json_body$fn__623.invoke(json.clj:21)
  at ring.middleware.json$wrap_json_response$fn__634.invoke(json.clj:42)
  at clojure.lang.Var.invoke(Var.java:415)
  at org.httpkit.server.HttpHandler.run(RingHandler.java:91)
  at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
  at java.util.concurrent.FutureTask.run(FutureTask.java:262)
  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
  at java.lang.Thread.run(Thread.java:744)

任何想法如何调试并找出我的请求失败的原因？

服务器接受文件，并与其他客户端、POSTman、Cocoa REST 客户端进行测试。

谢谢。

【问题讨论】：

标签： objective-c macos rest file-upload afnetworking-2

【解决方案1】：

通过删除 AFNetworking 并使用 Apple 的 NSURLRequest、NSURLConnection 类并在 stackoverflow 中进行一些搜索找到了答案。

我应该提一下，这可能是服务器不支持 AFNetworking 请求，或者该请求无法与所有服务器一起使用。

我的工作代码：

- (NSMutableURLRequest *)buildRequest:(NSData *)paramData fileName:(NSString *)name
    {
    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
    [request setURL:[NSURL URLWithString:[NSString stringWithFormat:@"%@/upload/thefile", BaseURL]]];
    [request setHTTPMethod:@"POST"];

    NSString *boundary = @"0xKhTmLbOuNdArY";
    NSString *endBoundary = [NSString stringWithFormat:@"\r\n--%@--", boundary];

    NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundary];
    [request addValue:contentType forHTTPHeaderField: @"Content-Type"];

    NSMutableData *tempPostData = [NSMutableData data]; 
    [tempPostData appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];

    // Sample file to send as data
    [tempPostData appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"file\"; filename=\"%@\"\r\n", name] dataUsingEncoding:NSUTF8StringEncoding]];
    [tempPostData appendData:[@"Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
    [tempPostData appendData:paramData];
    [tempPostData appendData:[endBoundary dataUsingEncoding:NSUTF8StringEncoding]];
    [request setHTTPBody:tempPostData];

    return request;
    }

- (BOOL) uploadSymbols:(NSString*)path apiKey:(NSString*)apiKey
    {
    NSData *symbolsData = [NSData dataWithContentsOfFile:path];

    if (!symbolsData) {
        NSLog(@"Symbols file at %@ does not exist.", path);
        return NO;
    }

    if ([symbolsData length] > 33554432) {
        NSLog(@"Symbols file at %@ is too large to upload.", path);
        return NO;
    }

    NSMutableURLRequest* request = [self buildRequest:symbolsData fileName:[path lastPathComponent]];
    [request setValue:apiKey forHTTPHeaderField:@"X-theapikey"];
    [NSURLConnection sendAsynchronousRequest:request queue:self.queue completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
       NSLog(@"End.");
    }];
    return true;
    }

【讨论】：