使用 AFNetworking 将文本和多个图像发布到 Google Blobstore

Question

作为参考，这是我在 iOS/Objective-c 中尝试做的工作的 android/Java 版本

public static void saveTextsAndImagesOnServer(List<byte[]> images, long someID1, String servingUrl, boolean someFlag)
            throws ClientProtocolException, IOException {
        Log.d(TAG, "saveTextsAndImagesOnServer started ");
        HttpClient httpClient = new DefaultHttpClient();
        HttpPost postRequest = new HttpPost(servingUrl);
        MultipartEntity reqEntity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);

        AdditionData extr = AdditionData.getInstance();
        reqEntity.addPart("red", new ByteArrayBody(("" + extr.getred()).getBytes(), "red"));
        reqEntity.addPart("yellow", new ByteArrayBody(extr.getyellow.getBytes(), "yellow"));
        reqEntity.addPart("green", new ByteArrayBody(extr.getgreen().getBytes(), "green"));
        reqEntity.addPart("blue", new ByteArrayBody((extr.getblue()).getBytes(), "blue"));
        reqEntity.addPart("someID1", new ByteArrayBody(("" + someID1).getBytes(), "someID1"));
        if (someFlag) {
            reqEntity.addPart("someFlag", new ByteArrayBody("true".getBytes(), "someFlag"));
        }
        int i = 0;
        for (byte[] img : images) {
            ByteArrayBody image = new ByteArrayBody(img, "img" + i++ + ".png");
            reqEntity.addPart("image", image);
        }
        postRequest.setEntity(reqEntity);
        HttpResponse response = httpClient.execute(postRequest);
        Log.d(TAG, "saveTextsAndImagesOnServer ended with response " + response.toString());
    }

总结：基本上我可以将图像和随附的元数据发送到 blobstore。例如，元数据可以帮助我识别图片的发送者。

现在尝试在 iOS 中做同样的事情，我编写了下面的代码。但无论出于何种原因，元数据都没有保存在 blobstore 中。我尝试了很多不同的东西，但我仍然一无所获。我尝试将元数据字符串更改为 base-64，但没有成功。

IOS 代码

-(void)postMultipartToServer
{
    if (!self.destinationUrl) {
        return;
    }

    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
    NSLog(@"IS dictionary empty? %@", self.textDictionary);

    [manager POST:self.destinationUrl
       parameters:self.textDictionary
    constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
        if ([self.imageDictionaries count]>0)
            for (NSDictionary *imgDic in self.imageDictionaries) {
                [formData appendPartWithFileData:UIImagePNGRepresentation([imgDic objectForKey:@"image"])
                                            name:[imgDic objectForKey:@"name"]//@"image"
                                        fileName:[imgDic objectForKey:@"fileName"]//@"image.png"
                                        mimeType:[imgDic objectForKey:@"mimeType"]//@"image/png"
                 ];
            }


    } success:^(AFHTTPRequestOperation *operation, id responseObject) {
        NSLog(@"Success: %@", responseObject);
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"Error: %@", error);
    }];
}

这是字典

 NSDictionary *textDictionary = @{
                                 @"yellow”:self. yellow,
                                 @"red":self. red,
                                 @"green”:self.green,
                                 @“blue”:self. blue,
                                 @“spouse”:self.spouse,
                                 @"isFamouse”:@”true”};//you get the idea

我在哪里？

鉴于这种设计适用于 android，我知道这是可能的，特别是因为 http 在涉及语言时应该是不可知的。所以问题被简化为将字符串从 iOS 保存到 Google blobstore。

我开始赏金，希望有人能帮助我解决这个问题（也许是 google blobstore-iOS 专家）。我还注意到其他人也问了几乎相同的问题，但没有答案。我问过这个问题的其他方式：

AFHTTPRequestOperationManager post multi-part request not working

How to convert NSString to UIImage for appengine blobstore

Answer 1

替换方法如下

-(void)postMultipartToServer
{
    if (!self.destinationUrl) {
        return;
    }

    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];

    [manager POST:self.destinationUrl
       parameters:nil
    constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {

        if ([self.textDictionary count]>0){
            if ([self.textDictionary count]>0)
                [self.textDictionary enumerateKeysAndObjectsUsingBlock:^(id key, id object, BOOL *stop) {
                    [formData appendPartWithFileData:[object dataUsingEncoding:NSUTF8StringEncoding]
                                                name:key
                                            fileName:key
                                            mimeType:@"application/json"
                     ];

                }];
        }

        if ([self.imageDictionaries count]>0)
            for (NSDictionary *imgDic in self.imageDictionaries) {
                [formData appendPartWithFileData:UIImagePNGRepresentation([imgDic objectForKey:@"image"])
                                            name:[imgDic objectForKey:@"name"]//@"image"
                                        fileName:[imgDic objectForKey:@"fileName"]//@"image.png"
                                        mimeType:[imgDic objectForKey:@"mimeType"]//@"image/png"
                 ];
            }
    } success:^(AFHTTPRequestOperation *operation, id responseObject) {
        NSLog(@"Success: %@", responseObject);
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"Error: %@", error);
    }];
}

Answer 2

最后，http 请求将是一个字符串。您可以记录该字符串。可能想为此使用一个小图像。然后对android请求做同样的事情，看看有什么区别。

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