Question

我有一个Android客户端希望将文件发送到我的Rails服务器。我使用Paperclip Gem用于rails，这是我在WebRick控制台中遇到的错误：

开始POST＆＃34; / logs＆＃34;在2015-07-23 16:51:20 +0800的192.168.63.142 ActiveRecord :: SchemaMigration Load（0.1ms）SELECT＆＃34; schema_migrations＆＃34;。* FROM＆＃34; schema_migrations＆＃34; 由LogsController处理#create as HTML 参数：{＆＃34; log＆＃34; =＆gt; {＆＃34;说明＆＃34; =＆gt;＆＃34;说明＆＃34;，＆＃34; user_id＆＃34; =＆gt;＆＃34; 1＆＃34;，＆＃34; file＆＃34; =＆gt;＃，@ original_filename =＆＃34; bugreport-1hour-head.txt＆＃34;，@ content_type =＆＃34; application / octet-stream＆＃34 ;，@ header =＆＃34; Content-Disposition：form-data;命名= \＆＃34;日志[文件] \＆＃34 ;; filename = \＆＃34; bugreport-1hour-head.txt \＆＃34; \ r \ nConContent-Type：application / octet-stream \ r \ n＆n＆＃34;＆gt;}} Command :: file -b --mime＆＃39; /tmp/9859aa87e4cbf0f33fd178012d8819b720150723-8057-lwvwns.txt' [paperclip]内容类型欺骗：文件名bugreport-1hour-head.txt（来自Headers的application / octet-stream，来自Extension的[＃]），从文件命令中发现的内容类型：text / plain。请参阅文档以允许此组合。（0.1ms）开始交易 Command :: file -b --mime＆＃39; /tmp/9859aa87e4cbf0f33fd178012d8819b720150723-8057-1ndzzr1.txt' [paperclip]内容类型欺骗：文件名bugreport-1hour-head.txt（来自Headers的application / octet-stream，来自Extension的[＃]），从文件命令中发现的内容类型：text / plain。请参阅文档以允许此组合。（0.2ms）回滚事务渲染日志/ _form.html.erb（16.6ms）在layouts / application中呈现logs / new.html.erb（21.6ms）在656ms完成200 OK（浏览次数：306.1ms | ActiveRecord：0.7ms）

它说

从文件命令中发现的内容类型：text / plain。请参阅文档以允许此组合。

但我已经允许在我的模型中使用内容类型text / plain

Android代码：

 mSendLogs.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            String url = "http://192.168.63.145:3000/logs";
            File file = new File(Environment.getExternalStorageDirectory().getAbsolutePath(),
                    "bugreport-1hour-head.txt");
            try {
                HttpClient httpclient = new DefaultHttpClient();

                HttpPost httppost = new HttpPost(url);
                MultipartEntity multipartEntity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
                multipartEntity.addPart("log[description]", new StringBody("Description"));
                multipartEntity.addPart("log[user_id]", new StringBody("1"));
                multipartEntity.addPart("log[file]", new FileBody(file) );
                httppost.setEntity(multipartEntity);

                HttpResponse response = httpclient.execute(httppost);
                String statusCode = response.getEntity().getContent().toString();
                Log.d("Benggal", "http.fr.server: " + statusCode + "Upload Logs");

            } catch (Exception e) {
                Log.e("Benggal",e.toString());
            }
        }
    });

使用回形针值的Rails模型：

class Log < ActiveRecord::Base
has_attached_file :file
validates_attachment_content_type :file, :content_type => "text/plain"

端

Rails Controller的保存行动：

 # POST /logs
  # POST /logs.json
  def create
    @log = Log.new(log_params)

    respond_to do |format|
      if @log.save
        format.html { redirect_to @log, notice: 'Log was successfully created.' }
        format.text {@log.file.url}
        format.json { render :show, status: :created, location: @log }
      else
        format.html { render :new }
        format.json { render json: @log.errors, status: :unprocessable_entity }
      end
    end
  end

Answer 1

我认为此消息是通过内容欺骗的验证检查引发的。对于Paperclip v.4，这会生成错误[https://github.com/thoughtbot/paperclip/issues/1429][1]

对于Paperclip v.3，它似乎只是抛出了弃用警告，[https://github.com/thoughtbot/paperclip/issues/1423][2]

所以要么在Gemfile

中使用它

 gem "paperclip", "~> 3.5.3"

或

将其添加到初始化程序以禁用欺骗保护：

配置/初始化/ paperclip_media_type_spoof_detector_override.rb

require 'paperclip/media_type_spoof_detector' module Paperclip class MediaTypeSpoofDetector def spoofed? false end end end

或

您可以在paperclip.rb中指定mime类型创建config/initializers文件。

Paperclip.options[:content_type_mappings] = { :txt=> 'application/octet-stream' }

Answer 2

您的Android客户端将文件发送为application/octet-steam而不是text/plain，这会导致Paperclip混淆，从而导致此异常。您可能必须修复客户端才能使其正常工作。

将文本文件从Android上传到Rails会导致内容类型欺骗错误

2 个答案:

配置/初始化/ paperclip_media_type_spoof_detector_override.rb