54 行
1.8 KiB
Ruby
54 行
1.8 KiB
Ruby
class PreviewController < ApplicationController
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before_action :require_member!
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def title
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return render_bad_request('URL は必須です．') if params[:url].blank?
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render json: { title: Preview::ThumbnailFetcher.title(params[:url]) }
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rescue Preview::UrlSafety::UnsafeUrl => e
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render_bad_request(e.message)
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rescue Preview::HttpFetcher::FetchTimeout => e
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render_preview_error(e.message, :gateway_timeout)
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rescue Preview::HttpFetcher::FetchFailed => e
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render_preview_error(e.message, :bad_gateway)
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end
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def thumbnail
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return render_bad_request('URL は必須です．') if params[:url].blank?
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image = MiniMagick::Image.read(Preview::ThumbnailFetcher.fetch(params[:url]))
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image.auto_orient
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image.resize '180x180>'
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image.format 'png'
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width, height = image.dimensions
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raise Preview::ThumbnailFetcher::GenerationFailed, 'サムネール画像の変換に失敗しました．' if width > 180 || height > 180
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send_data image.to_blob, type: 'image/png', disposition: 'inline'
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rescue Preview::UrlSafety::UnsafeUrl => e
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render_bad_request(e.message)
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rescue Preview::HttpFetcher::FetchTimeout => e
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render_preview_error(e.message, :gateway_timeout)
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rescue Preview::HttpFetcher::FetchFailed => e
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render_preview_error(e.message, :bad_gateway)
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rescue Preview::ThumbnailFetcher::GenerationFailed, MiniMagick::Error => e
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render_unprocessable_entity(e.message)
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end
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private
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def require_member!
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return head :unauthorized unless current_user
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return if current_user.gte_member?
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head :forbidden
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end
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def render_preview_error(message, status)
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render json: { type: status.to_s,
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message:,
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errors: { },
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base_errors: [message] },
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status:
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end
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end
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