Question

我正在尝试转换一些我用来在Android设备上使用Retrofit 2.0上传图片的iOS代码。我对此的尝试失败了，我不知道为什么。服务器似乎无法获得图片。

以下是可用的iOS代码：

NSData *imageData = UIImageJPEGRepresentation(image, 90);
// setting up the URL to post to
NSString *urlString = [NSString stringWithFormat:@"http://%@/uploadPicture.php", [[NSUserDefaults standardUserDefaults] stringForKey:@"serviceIPAddress"]];

// setting up the request object now
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:[NSURL URLWithString:urlString]];
[request setHTTPMethod:@"POST"];

/*
 add some header info now
 we always need a boundary when we post a file
 also we need to set the content type

 You might want to generate a random boundary.. this is just the same
 as my output from wireshark on a valid html post
 */
NSString *boundary = @"---------------------------14737809831466499882746641449";
NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary];
[request addValue:contentType forHTTPHeaderField: @"Content-Type"];

/*
 now lets create the body of the post
 */
NSMutableData *body = [NSMutableData data];
[body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"userfile\"; filename=\"%@.jpg\"\r\n", persistentID] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[NSData dataWithData:imageData]];
[body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
// setting the body of the post to the reqeust
[request setHTTPBody:body];

// now lets make the connection to the web
NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];

这是失败的Android代码：

@POST
Call<Void> uploadImage(@Url String url, @Body RequestBody imageFile);

private void uploadInventoryImage(InventoryItem item, Uri imageUri, final boolean isNewItem) {

    final File imageFile = new File(imageUri.getPath());
    final File root = new File(Environment.getExternalStorageDirectory() + File.separator + "MyDir" + File.separator);
    final String imageName = item.getPersistentId() + ".jpg";
    final File renamedImageFile= new File(root, imageName);

    if (imageFile.renameTo(renamedImageFile)) {

        SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(mContext);
        String uploadUrl = "http://" + settings.getString("serverPath", "") + "/mamobile/uploadPicture.php";

        RequestBody fileBody = RequestBody.create(MediaType.parse("image/jpeg"), renamedImageFile);
        MultipartBuilder multipartBuilder = new MultipartBuilder("---------------------------14737809831466499882746641449");
        multipartBuilder.addFormDataPart("userfile", renamedImageFile.getName(), fileBody);
        RequestBody fileRequestBody = multipartBuilder.build();

        mApiClient.getInventoryService().uploadImage(uploadUrl, fileRequestBody).enqueue(new Callback<Void>() {
            @Override
            public void onResponse(Response<Void> response, Retrofit retrofit) {
                //upload image sucess
                if (isNewItem) {
                    mBus.post(new InventoryEditEvent.OnUpdateSuccess());
                } else {
                    mBus.post(new InventoryEditEvent.OnNewSuccess());
                }
            }

            @Override
            public void onFailure(Throwable error) {
                if (error != null && error.getMessage() != null) {
                    mBus.post(new InventoryEditEvent.OnUploadImageFailure(error.getMessage(), -1));
                } else {
                    mBus.post(new InventoryEditEvent.OnUploadImageFailure("Unknown Error", -1));
                }
            }
        });


    } else {
        //file name failed;
        mBus.post(new InventoryEditEvent.OnUploadImageFailure("Could not rename image", -1));
    }
}

请求恢复成功，但服务器似乎无法获取图像。

Answer 1

首先，尝试将服务方法描述更改为此

@Multipart
@POST
Call<Void> uploadImage(@Url String url, @Part("description") String description, @Part("myfile\"; filename=\"image.png\"") RequestBody imageFile);

description部分是可选的。只需抬头，您需要在@Part注释中对文件名进行硬编码。它是对现有OkHttp错误的一种解决方法，它是默认内置的retrofit2 http客户端。

有关如何使用上传文件的深入文档，请阅读this。

使用Retrofit 2上传图像

1 个答案: