【发布时间】：2017-11-14 02:40:15
【问题描述】：
我正在使用 Google Drive API 下载图像并使用 Paperclip 将文件上传到我的 Rails API。
我已将 Google Drive 图像下载为 BytesIO()，并使用 Pillow 将字节保存/转换为名为 tmp.png 的图像。我现在使用请求将我的文件发布到 Rails：
# I have a io.BytesIO() instance fh, with the image byte data.
fh.seek(0)
img = Image.open(fh)
img.save('tmp.png')
response = requests.post(LOCALHOST_MEDIA_ENDPOINT,
data={
"media": {
"attachment": open('tmp.png', 'rb')
# I've also tried just using img
}
},
headers={
'content-type': 'application/json'
})
媒体/回形针控制器工作；它已经在带有文件 dropzone 的 Node 应用程序上使用表单提交进行了测试。但是，当我提出这个请求时，我的 localhost 日志会吐出：
Started POST "/media" for 172.18.0.1 at 2017-11-14 02:16:35 +0000
web_1 | Error occurred while parsing request parameters.
web_1 | Contents:
web_1 |
web_1 | media=attachment
web_1 |
web_1 | ActionDispatch::Http::Parameters::ParseError (822: unexpected token at 'media=attachment'):
web_1 |
web_1 | actionpack (5.1.2) lib/action_dispatch/http/parameters.rb:113:in `rescue in parse_formatted_parameters'
web_1 | actionpack (5.1.2) lib/action_dispatch/http/parameters.rb:107:in `parse_formatted_parameters'
web_1 | actionpack (5.1.2) lib/action_dispatch/http/request.rb:358:in `block in POST'
web_1 | rack (2.0.3) lib/rack/request.rb:57:in `fetch'
web_1 | rack (2.0.3) lib/rack/request.rb:57:in `fetch_header'
web_1 | actionpack (5.1.2) lib/action_dispatch/http/request.rb:357:in `POST'
web_1 | actionpack (5.1.2) lib/action_controller/metal/params_wrapper.rb:286:in `_wrapper_enabled?'
web_1 | actionpack (5.1.2) lib/action_controller/metal/params_wrapper.rb:235:in `process_action'
web_1 | activerecord (5.1.2) lib/active_record/railties/controller_runtime.rb:22:in `process_action'
web_1 | actionpack (5.1.2) lib/abstract_controller/base.rb:124:in `process'
web_1 | actionpack (5.1.2) lib/action_controller/metal.rb:189:in `dispatch'
web_1 | actionpack (5.1.2) lib/action_controller/metal.rb:253:in `dispatch'
web_1 | actionpack (5.1.2) lib/action_dispatch/routing/route_set.rb:49:in `dispatch'
web_1 | actionpack (5.1.2) lib/action_dispatch/routing/route_set.rb:31:in `serve'
web_1 | actionpack (5.1.2) lib/action_dispatch/journey/router.rb:46:in `block in serve'
web_1 | actionpack (5.1.2) lib/action_dispatch/journey/router.rb:33:in `each'
web_1 | actionpack (5.1.2) lib/action_dispatch/journey/router.rb:33:in `serve'
web_1 | actionpack (5.1.2) lib/action_dispatch/routing/route_set.rb:832:in `call'
web_1 | omniauth (1.6.1) lib/omniauth/strategy.rb:189:in `call!'
web_1 | omniauth (1.6.1) lib/omniauth/strategy.rb:167:in `call'
web_1 | omniauth (1.6.1) lib/omniauth/builder.rb:63:in `call'
web_1 | rack (2.0.3) lib/rack/session/abstract/id.rb:232:in `context'
web_1 | rack (2.0.3) lib/rack/session/abstract/id.rb:226:in `call'
web_1 | actionpack (5.1.2) lib/action_dispatch/middleware/cookies.rb:613:in `call'
web_1 | olive_branch (1.2.3) lib/olive_branch/middleware.rb:14:in `call'
web_1 | warden (1.2.7) lib/warden/manager.rb:36:in `block in call'
web_1 | warden (1.2.7) lib/warden/manager.rb:35:in `catch'
web_1 | warden (1.2.7) lib/warden/manager.rb:35:in `call'
web_1 | rack (2.0.3) lib/rack/etag.rb:25:in `call'
web_1 | rack (2.0.3) lib/rack/conditional_get.rb:38:in `call'
web_1 | rack (2.0.3) lib/rack/head.rb:12:in `call'
web_1 | activerecord (5.1.2) lib/active_record/migration.rb:556:in `call'
web_1 | actionpack (5.1.2) lib/action_dispatch/middleware/callbacks.rb:26:in `block in call'
web_1 | activesupport (5.1.2) lib/active_support/callbacks.rb:97:in `run_callbacks'
web_1 | actionpack (5.1.2) lib/action_dispatch/middleware/callbacks.rb:24:in `call'
web_1 | actionpack (5.1.2) lib/action_dispatch/middleware/executor.rb:12:in `call'
web_1 | actionpack (5.1.2) lib/action_dispatch/middleware/debug_exceptions.rb:59:in `call'
web_1 | actionpack (5.1.2) lib/action_dispatch/middleware/show_exceptions.rb:31:in `call'
web_1 | railties (5.1.2) lib/rails/rack/logger.rb:36:in `call_app'
web_1 | railties (5.1.2) lib/rails/rack/logger.rb:24:in `block in call'
web_1 | activesupport (5.1.2) lib/active_support/tagged_logging.rb:69:in `block in tagged'
web_1 | activesupport (5.1.2) lib/active_support/tagged_logging.rb:26:in `tagged'
web_1 | activesupport (5.1.2) lib/active_support/tagged_logging.rb:69:in `tagged'
web_1 | railties (5.1.2) lib/rails/rack/logger.rb:24:in `call'
web_1 | actionpack (5.1.2) lib/action_dispatch/middleware/remote_ip.rb:79:in `call'
web_1 | actionpack (5.1.2) lib/action_dispatch/middleware/request_id.rb:25:in `call'
web_1 | rack (2.0.3) lib/rack/runtime.rb:22:in `call'
web_1 | activesupport (5.1.2) lib/active_support/cache/strategy/local_cache_middleware.rb:27:in `call'
web_1 | actionpack (5.1.2) lib/action_dispatch/middleware/executor.rb:12:in `call'
web_1 | actionpack (5.1.2) lib/action_dispatch/middleware/static.rb:125:in `call'
web_1 | rack (2.0.3) lib/rack/sendfile.rb:111:in `call'
web_1 | rack-cors (1.0.1) lib/rack/cors.rb:93:in `call'
web_1 | railties (5.1.2) lib/rails/engine.rb:522:in `call'
web_1 | puma (3.9.1) lib/puma/configuration.rb:224:in `call'
web_1 | puma (3.9.1) lib/puma/server.rb:602:in `handle_request'
web_1 | puma (3.9.1) lib/puma/server.rb:435:in `process_client'
web_1 | puma (3.9.1) lib/puma/server.rb:299:in `block in run'
web_1 | puma (3.9.1) lib/puma/thread_pool.rb:120:in `block in spawn_thread'
我的控制器：
def create
@medium = Medium.new(medium_params)
if @medium.save
render json: @medium.to_json(
:only => [:id, :title, :caption],
:methods => [
:attachment_url,
:medium_attachment_url,
:thumb_attachment_url
]
), status: :created, location: @medium
else
render json: @medium.errors, status: :unprocessable_entity
end
end
...
def medium_params
params.require(:medium).permit(
# other irrelevant string/int permitted params
:attachment
)
end
我在想，图像在此请求中的编码方式可能与表单提交数据的方式不同。但不幸的是，我非常卡住。
【问题讨论】：
-
我不确定这是否是唯一的问题，但我认为您的编码可能是正确的——请参阅Post a multipart encoded file，注意此方法与您的代码有何不同。跨度>
标签： python ruby-on-rails paperclip pillow