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PODownloading S3 files(objects) using aws-sdk for ruby in rails
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  1. PODownloading S3 files(objects) using aws-sdk for ruby in rails
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    copied!<p>I am not using paperclip or carrierwave or any other gems for interaction with amazon web services s3. In fact, I am not using any models, just directly interacting with S3 objects.</p> <p>Can someone please provide some code as to how to directly download objects(files) from AWS S3</p> <p>This is my code so far :</p> <p><strong>View:</strong></p> <pre><code>&lt;h2&gt;Download Files&lt;/h2&gt; &lt;%@root_files.each do |file| %&gt; &lt;% next if @obj %&gt; &lt;td&gt;Filename: &lt;b&gt;&lt;%= file %&gt;&lt;/b&gt;&lt;/td&gt; &lt;td&gt;&lt;%= link_to "Download", download_url_for(file) %&gt;&lt;/td&gt; &lt;% end %&gt; </code></pre> <p>Corresponding <strong>Controller:</strong></p> <pre><code>def xxx bucket = AWS::S3.new.buckets[ ENV["BUCKET"]] @root_files = bucket.as_tree.children.select(&amp;:leaf?).collect(&amp;:key) end </code></pre> <p><strong>download_url_for method</strong>:</p> <pre><code>def download_url_for(file_key) s3 = AWS::S3.new bucket = s3.buckets[ ENV["BUCKET"]] object = bucket.objects[file_key] File.open('xxxxx', 'wb') do |file| object.read do |chunk| file.write(chunk) end end end </code></pre> <p>I need to be able to save the downloaded file on any browsable non-pretedetermined location on my desktop.Id really appreciate view on how to modify the download_url_for method to achieve this.</p> <p>===================================== I just tried using </p> <pre><code>&lt;td&gt;&lt;%= link_to "Download",object.value.url_for(:read).to_s %&gt;&lt;/td&gt; </code></pre> <p>But on downloading I only get a zip file with xml content inside it, not the original file (word document in my case) --- any thoughts on how to modify this so as to get the actual file type and contents? Thanks</p> <p>=======================Heres my code for uploading the file</p> <p><strong>View code:</strong></p> <pre><code>&lt;%= form_tag({:action =&gt; 'create_file'}, multipart: true) do %&gt; &lt;%= file_field_tag 'uploaded_file' %&gt;&lt;br /&gt; &lt;%= submit_tag 'Upload' %&gt; &lt;br /&gt; &lt;% end %&gt; </code></pre> <p><strong>Controller action</strong> - create_file action</p> <pre><code>def create_file s3 = AWS::S3.new bucket = s3.buckets[ENV["BUCKET"]] key = params[:uploaded_file].original_filename object = bucket.objects[key] object.write(params[:uploaded_file].read) end </code></pre> <p>Can someone suggest as to how I can check the MIME type or preserve the filename while uploading if thats the issue as mentioned by @Frederick Cheung? thanks</p>
 

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