require 'spec_helper'

describe Gitlab::Lfs::Router, lib: true do
  let(:project) { create(:project) }
  let(:public_project) { create(:project, :public) }
  let(:forked_project) { fork_project(public_project, user) }

  let(:user) { create(:user) }
  let(:user_two) { create(:user) }
  let!(:lfs_object) { create(:lfs_object, :with_file) }

  let(:request) { Rack::Request.new(env) }
  let(:env) do
    {
      'rack.input'     => '',
      'REQUEST_METHOD' => 'GET',
    }
  end

  let(:lfs_router_auth) { new_lfs_router(project, user: user) }
  let(:lfs_router_ci_auth) { new_lfs_router(project, ci: true) }
  let(:lfs_router_noauth) { new_lfs_router(project) }
  let(:lfs_router_public_auth) { new_lfs_router(public_project, user: user) }
  let(:lfs_router_public_ci_auth) { new_lfs_router(public_project, ci: true) }
  let(:lfs_router_public_noauth) { new_lfs_router(public_project) }
  let(:lfs_router_forked_noauth) { new_lfs_router(forked_project) }
  let(:lfs_router_forked_auth) { new_lfs_router(forked_project, user: user_two) }
  let(:lfs_router_forked_ci_auth) { new_lfs_router(forked_project, ci: true) }

  let(:sample_oid) { "b68143e6463773b1b6c6fd009a76c32aeec041faff32ba2ed42fd7f708a17f80" }
  let(:sample_size) { 499013 }
  let(:respond_with_deprecated) {[ 501, { "Content-Type" => "application/json; charset=utf-8" }, ["{\"message\":\"Server supports batch API only, please update your Git LFS client to version 1.0.1 and up.\",\"documentation_url\":\"#{Gitlab.config.gitlab.url}/help\"}"]]}
  let(:respond_with_disabled) {[ 501, { "Content-Type" => "application/json; charset=utf-8" }, ["{\"message\":\"Git LFS is not enabled on this GitLab server, contact your admin.\",\"documentation_url\":\"#{Gitlab.config.gitlab.url}/help\"}"]]}

  describe 'when lfs is disabled' do
    before do
      allow(Gitlab.config.lfs).to receive(:enabled).and_return(false)
      env['REQUEST_METHOD'] = 'POST'
      body = {
                'objects' => [
                  { 'oid' => '91eff75a492a3ed0dfcb544d7f31326bc4014c8551849c192fd1e48d4dd2c897',
                    'size' => 1575078
                  },
                  { 'oid' => sample_oid,
                    'size' => sample_size
                  }
                ],
                'operation' => 'upload'
              }.to_json
      env['rack.input'] = StringIO.new(body)
      env["PATH_INFO"] = "#{project.repository.path_with_namespace}.git/info/lfs/objects/batch"
    end

    it 'responds with 501' do
      expect(lfs_router_auth.try_call).to match_array(respond_with_disabled)
    end
  end

  describe 'when fetching lfs object using deprecated API' do
    before do
      enable_lfs
      env["PATH_INFO"] = "#{project.repository.path_with_namespace}.git/info/lfs/objects/#{sample_oid}"
    end

    it 'responds with 501' do
      expect(lfs_router_auth.try_call).to match_array(respond_with_deprecated)
    end
  end

  describe 'when fetching lfs object' do
    before do
      enable_lfs
      env['HTTP_ACCEPT'] = "application/vnd.git-lfs+json; charset=utf-8"
      env["PATH_INFO"] = "#{project.repository.path_with_namespace}.git/gitlab-lfs/objects/#{sample_oid}"
    end

    describe 'and request comes from gitlab-workhorse' do
      context 'without user being authorized' do
        it "responds with status 401" do
          expect(lfs_router_noauth.try_call.first).to eq(401)
        end
      end

      context 'with required headers' do
        before do
          project.lfs_objects << lfs_object
          env['HTTP_X_SENDFILE_TYPE'] = "X-Sendfile"
        end

        context 'when user does not have project access' do
          it "responds with status 403" do
            expect(lfs_router_auth.try_call.first).to eq(403)
          end
        end

        context 'when user has project access' do
          before do
            project.team << [user, :master]
          end

          it "responds with status 200" do
            expect(lfs_router_auth.try_call.first).to eq(200)
          end

          it "responds with the file location" do
            expect(lfs_router_auth.try_call[1]['Content-Type']).to eq("application/octet-stream")
            expect(lfs_router_auth.try_call[1]['X-Sendfile']).to eq(lfs_object.file.path)
          end
        end

        context 'when CI is authorized' do
          it "responds with status 200" do
            expect(lfs_router_ci_auth.try_call.first).to eq(200)
          end

          it "responds with the file location" do
            expect(lfs_router_ci_auth.try_call[1]['Content-Type']).to eq("application/octet-stream")
            expect(lfs_router_ci_auth.try_call[1]['X-Sendfile']).to eq(lfs_object.file.path)
          end
        end
      end

      context 'without required headers' do
        it "responds with status 403" do
          expect(lfs_router_auth.try_call.first).to eq(403)
        end
      end
    end
  end

  describe 'when handling lfs request using deprecated API' do
    before do
      enable_lfs
      env['REQUEST_METHOD'] = 'POST'
      env["PATH_INFO"] = "#{project.repository.path_with_namespace}.git/info/lfs/objects"
    end

    it 'responds with 501' do
      expect(lfs_router_auth.try_call).to match_array(respond_with_deprecated)
    end
  end

  describe 'when handling lfs batch request' do
    before do
      enable_lfs
      env['REQUEST_METHOD'] = 'POST'
      env['PATH_INFO'] = "#{project.repository.path_with_namespace}.git/info/lfs/objects/batch"
    end

    describe 'download' do
      before do
        body = { 'operation' => 'download',
                 'objects' => [
                   { 'oid' => sample_oid,
                     'size' => sample_size
                   }]
        }.to_json
        env['rack.input'] = StringIO.new(body)
      end

      shared_examples 'an authorized requests' do
        context 'when downloading an lfs object that is assigned to our project' do
          before do
            project.lfs_objects << lfs_object
          end

          it 'responds with status 200 and href to download' do
            response = router.try_call
            expect(response.first).to eq(200)
            response_body = ActiveSupport::JSON.decode(response.last.first)

            expect(response_body).to eq('objects' => [
              { 'oid' => sample_oid,
                'size' => sample_size,
                'actions' => {
                  'download' => {
                    'href' => "#{project.http_url_to_repo}/gitlab-lfs/objects/#{sample_oid}",
                    'header' => { 'Authorization' => auth }
                  }
                }
              }])
          end
        end

        context 'when downloading an lfs object that is assigned to other project' do
          before do
            public_project.lfs_objects << lfs_object
          end

          it 'responds with status 200 and error message' do
            response = router.try_call
            expect(response.first).to eq(200)
            response_body = ActiveSupport::JSON.decode(response.last.first)

            expect(response_body).to eq('objects' => [
              { 'oid' => sample_oid,
                'size' => sample_size,
                'error' => {
                  'code' => 404,
                  'message' => "Object does not exist on the server or you don't have permissions to access it",
                }
              }])
          end
        end

        context 'when downloading a lfs object that does not exist' do
          before do
            body = { 'operation' => 'download',
                     'objects' => [
                       { 'oid' => '91eff75a492a3ed0dfcb544d7f31326bc4014c8551849c192fd1e48d4dd2c897',
                         'size' => 1575078
                       }]
            }.to_json
            env['rack.input'] = StringIO.new(body)
          end

          it "responds with status 200 and error message" do
            response = router.try_call
            expect(response.first).to eq(200)
            response_body = ActiveSupport::JSON.decode(response.last.first)

            expect(response_body).to eq('objects' => [
              { 'oid' => '91eff75a492a3ed0dfcb544d7f31326bc4014c8551849c192fd1e48d4dd2c897',
                'size' => 1575078,
                'error' => {
                  'code' => 404,
                  'message' => "Object does not exist on the server or you don't have permissions to access it",
                }
              }])
          end
        end

        context 'when downloading one new and one existing lfs object' do
          before do
            body = { 'operation' => 'download',
                     'objects' => [
                       { 'oid' => '91eff75a492a3ed0dfcb544d7f31326bc4014c8551849c192fd1e48d4dd2c897',
                         'size' => 1575078
                       },
                       { 'oid' => sample_oid,
                         'size' => sample_size
                       }
                     ]
            }.to_json
            env['rack.input'] = StringIO.new(body)
            project.lfs_objects << lfs_object
          end

          it "responds with status 200 with upload hypermedia link for the new object" do
            response = router.try_call
            expect(response.first).to eq(200)
            response_body = ActiveSupport::JSON.decode(response.last.first)

            expect(response_body).to eq('objects' => [
              { 'oid' => '91eff75a492a3ed0dfcb544d7f31326bc4014c8551849c192fd1e48d4dd2c897',
                'size' => 1575078,
                'error' => {
                  'code' => 404,
                  'message' => "Object does not exist on the server or you don't have permissions to access it",
                }
              },
              { 'oid' => sample_oid,
                'size' => sample_size,
                'actions' => {
                  'download' => {
                    'href' => "#{project.http_url_to_repo}/gitlab-lfs/objects/#{sample_oid}",
                    'header' => { 'Authorization' => auth }
                  }
                }
              }])
          end
        end
      end

      context 'when user is authenticated' do
        let(:auth) { authorize(user) }

        before do
          env["HTTP_AUTHORIZATION"] = auth
          project.team << [user, role]
        end

        it_behaves_like 'an authorized requests' do
          let(:role) { :reporter }
          let(:router) { lfs_router_auth }
        end

        context 'when user does is not member of the project' do
          let(:role) { :guest }

          it 'responds with 403' do
            expect(lfs_router_auth.try_call.first).to eq(403)
          end
        end

        context 'when user does not have download access' do
          let(:role) { :guest }

          it 'responds with 403' do
            expect(lfs_router_auth.try_call.first).to eq(403)
          end
        end
      end

      context 'when CI is authorized' do
        let(:auth) { 'gitlab-ci-token:password' }

        before do
          env["HTTP_AUTHORIZATION"] = auth
        end

        it_behaves_like 'an authorized requests' do
          let(:router) { lfs_router_ci_auth }
        end
      end

      context 'when user is not authenticated' do
        describe 'is accessing public project' do
          before do
            public_project.lfs_objects << lfs_object
          end

          it 'responds with status 200 and href to download' do
            response = lfs_router_public_noauth.try_call
            expect(response.first).to eq(200)
            response_body = ActiveSupport::JSON.decode(response.last.first)

            expect(response_body).to eq('objects' => [
              { 'oid' => sample_oid,
                'size' => sample_size,
                'actions' => {
                  'download' => {
                    'href' => "#{public_project.http_url_to_repo}/gitlab-lfs/objects/#{sample_oid}",
                    'header' => {}
                  }
                }
              }])
          end
        end

        describe 'is accessing non-public project' do
          before do
            project.lfs_objects << lfs_object
          end

          it 'responds with authorization required' do
            expect(lfs_router_noauth.try_call.first).to eq(401)
          end
        end
      end
    end

    describe 'upload' do
      before do
        body = { 'operation' => 'upload',
                 'objects' => [
                   { 'oid' => sample_oid,
                     'size' => sample_size
                   }]
        }.to_json
        env['rack.input'] = StringIO.new(body)
      end

      describe 'when request is authenticated' do
        describe 'when user has project push access' do
          before do
            @auth = authorize(user)
            env["HTTP_AUTHORIZATION"] = @auth
            project.team << [user, :developer]
          end

          context 'when pushing an lfs object that already exists' do
            before do
              public_project.lfs_objects << lfs_object
            end

            it "responds with status 200 and links the object to the project" do
              response_body = lfs_router_auth.try_call.last
              response = ActiveSupport::JSON.decode(response_body.first)

              expect(response['objects']).to be_kind_of(Array)
              expect(response['objects'].first['oid']).to eq(sample_oid)
              expect(response['objects'].first['size']).to eq(sample_size)
              expect(lfs_object.projects.pluck(:id)).not_to include(project.id)
              expect(lfs_object.projects.pluck(:id)).to include(public_project.id)
              expect(response['objects'].first['actions']['upload']['href']).to eq("#{Gitlab.config.gitlab.url}/#{project.path_with_namespace}.git/gitlab-lfs/objects/#{sample_oid}/#{sample_size}")
              expect(response['objects'].first['actions']['upload']['header']).to eq('Authorization' => @auth)
            end
          end

          context 'when pushing a lfs object that does not exist' do
            before do
              body = { 'operation' => 'upload',
                       'objects' => [
                         { 'oid' => '91eff75a492a3ed0dfcb544d7f31326bc4014c8551849c192fd1e48d4dd2c897',
                           'size' => 1575078
                         }]
              }.to_json
              env['rack.input'] = StringIO.new(body)
            end

            it "responds with status 200 and upload hypermedia link" do
              response = lfs_router_auth.try_call
              expect(response.first).to eq(200)

              response_body = ActiveSupport::JSON.decode(response.last.first)
              expect(response_body['objects']).to be_kind_of(Array)
              expect(response_body['objects'].first['oid']).to eq("91eff75a492a3ed0dfcb544d7f31326bc4014c8551849c192fd1e48d4dd2c897")
              expect(response_body['objects'].first['size']).to eq(1575078)
              expect(lfs_object.projects.pluck(:id)).not_to include(project.id)
              expect(response_body['objects'].first['actions']['upload']['href']).to eq("#{Gitlab.config.gitlab.url}/#{project.path_with_namespace}.git/gitlab-lfs/objects/91eff75a492a3ed0dfcb544d7f31326bc4014c8551849c192fd1e48d4dd2c897/1575078")
              expect(response_body['objects'].first['actions']['upload']['header']).to eq('Authorization' => @auth)
            end
          end

          context 'when pushing one new and one existing lfs object' do
            before do
              body = { 'operation' => 'upload',
                       'objects' => [
                         { 'oid' => '91eff75a492a3ed0dfcb544d7f31326bc4014c8551849c192fd1e48d4dd2c897',
                           'size' => 1575078
                         },
                         { 'oid' => sample_oid,
                           'size' => sample_size
                         }
                       ]
              }.to_json
              env['rack.input'] = StringIO.new(body)
              project.lfs_objects << lfs_object
            end

            it "responds with status 200 with upload hypermedia link for the new object" do
              response = lfs_router_auth.try_call
              expect(response.first).to eq(200)

              response_body = ActiveSupport::JSON.decode(response.last.first)
              expect(response_body['objects']).to be_kind_of(Array)

              expect(response_body['objects'].first['oid']).to eq("91eff75a492a3ed0dfcb544d7f31326bc4014c8551849c192fd1e48d4dd2c897")
              expect(response_body['objects'].first['size']).to eq(1575078)
              expect(response_body['objects'].first['actions']['upload']['href']).to eq("#{Gitlab.config.gitlab.url}/#{project.path_with_namespace}.git/gitlab-lfs/objects/91eff75a492a3ed0dfcb544d7f31326bc4014c8551849c192fd1e48d4dd2c897/1575078")
              expect(response_body['objects'].first['actions']['upload']['header']).to eq("Authorization" => @auth)

              expect(response_body['objects'].last['oid']).to eq(sample_oid)
              expect(response_body['objects'].last['size']).to eq(sample_size)
              expect(response_body['objects'].last).not_to have_key('actions')
            end
          end
        end

        context 'when user does not have push access' do
          it 'responds with 403' do
            expect(lfs_router_auth.try_call.first).to eq(403)
          end
        end

        context 'when CI is authorized' do
          it 'responds with 401' do
            expect(lfs_router_ci_auth.try_call.first).to eq(401)
          end
        end
      end

      context 'when user is not authenticated' do
        context 'when user has push access' do
          before do
            project.team << [user, :master]
          end

          it "responds with status 401" do
            expect(lfs_router_public_noauth.try_call.first).to eq(401)
          end
        end

        context 'when user does not have push access' do
          it "responds with status 401" do
            expect(lfs_router_public_noauth.try_call.first).to eq(401)
          end
        end
      end

      context 'when CI is authorized' do
        let(:auth) { 'gitlab-ci-token:password' }

        before do
          env["HTTP_AUTHORIZATION"] = auth
        end

        it "responds with status 403" do
          expect(lfs_router_public_ci_auth.try_call.first).to eq(401)
        end
      end
    end

    describe 'unsupported' do
      before do
        body = { 'operation' => 'other',
                 'objects' => [
                   { 'oid' => sample_oid,
                     'size' => sample_size
                   }]
        }.to_json
        env['rack.input'] = StringIO.new(body)
      end

      it 'responds with status 404' do
        expect(lfs_router_public_noauth.try_call.first).to eq(404)
      end
    end
  end

  describe 'when pushing a lfs object' do
    before do
      enable_lfs
      env['REQUEST_METHOD'] = 'PUT'
    end

    shared_examples 'unauthorized' do
      context 'and request is sent by gitlab-workhorse to authorize the request' do
        before do
          header_for_upload_authorize(router.project)
        end

        it 'responds with status 401' do
          expect(router.try_call.first).to eq(401)
        end
      end

      context 'and request is sent by gitlab-workhorse to finalize the upload' do
        before do
          headers_for_upload_finalize(router.project)
        end

        it 'responds with status 401' do
          expect(router.try_call.first).to eq(401)
        end
      end

      context 'and request is sent with a malformed headers' do
        before do
          env["PATH_INFO"] = "#{router.project.repository.path_with_namespace}.git/gitlab-lfs/objects/#{sample_oid}/#{sample_size}"
          env["HTTP_X_GITLAB_LFS_TMP"] = "cat /etc/passwd"
        end

        it 'does not recognize it as a valid lfs command' do
          expect(router.try_call).to eq(nil)
        end
      end
    end

    shared_examples 'forbidden' do
      context 'and request is sent by gitlab-workhorse to authorize the request' do
        before do
          header_for_upload_authorize(router.project)
        end

        it 'responds with 403' do
          expect(router.try_call.first).to eq(403)
        end
      end

      context 'and request is sent by gitlab-workhorse to finalize the upload' do
        before do
          headers_for_upload_finalize(router.project)
        end

        it 'responds with 403' do
          expect(router.try_call.first).to eq(403)
        end
      end
    end

    describe 'to one project' do
      describe 'when user is authenticated' do
        describe 'when user has push access to the project' do
          before do
            project.team << [user, :developer]
          end

          context 'and request is sent by gitlab-workhorse to authorize the request' do
            before do
              header_for_upload_authorize(project)
            end

            it 'responds with status 200, location of lfs store and object details' do
              json_response = ActiveSupport::JSON.decode(lfs_router_auth.try_call.last.first)

              expect(lfs_router_auth.try_call.first).to eq(200)
              expect(json_response['StoreLFSPath']).to eq("#{Gitlab.config.shared.path}/lfs-objects/tmp/upload")
              expect(json_response['LfsOid']).to eq(sample_oid)
              expect(json_response['LfsSize']).to eq(sample_size)
            end
          end

          context 'and request is sent by gitlab-workhorse to finalize the upload' do
            before do
              headers_for_upload_finalize(project)
            end

            it 'responds with status 200 and lfs object is linked to the project' do
              expect(lfs_router_auth.try_call.first).to eq(200)
              expect(lfs_object.projects.pluck(:id)).to include(project.id)
            end
          end
        end

        describe 'and user does not have push access' do
          let(:router) { lfs_router_auth }

          it_behaves_like 'forbidden'
        end
      end

      context 'when CI is authenticated' do
        let(:router) { lfs_router_ci_auth }

        it_behaves_like 'unauthorized'
      end

      context 'for unauthenticated' do
        let(:router) { new_lfs_router(project) }

        it_behaves_like 'unauthorized'
      end
    end

    describe 'to a forked project' do
      let(:forked_project) { fork_project(public_project, user) }

      describe 'when user is authenticated' do
        describe 'when user has push access to the project' do
          before do
            forked_project.team << [user_two, :developer]
          end

          context 'and request is sent by gitlab-workhorse to authorize the request' do
            before do
              header_for_upload_authorize(forked_project)
            end

            it 'responds with status 200, location of lfs store and object details' do
              json_response = ActiveSupport::JSON.decode(lfs_router_forked_auth.try_call.last.first)

              expect(lfs_router_forked_auth.try_call.first).to eq(200)
              expect(json_response['StoreLFSPath']).to eq("#{Gitlab.config.shared.path}/lfs-objects/tmp/upload")
              expect(json_response['LfsOid']).to eq(sample_oid)
              expect(json_response['LfsSize']).to eq(sample_size)
            end
          end

          context 'and request is sent by gitlab-workhorse to finalize the upload' do
            before do
              headers_for_upload_finalize(forked_project)
            end

            it 'responds with status 200 and lfs object is linked to the source project' do
              expect(lfs_router_forked_auth.try_call.first).to eq(200)
              expect(lfs_object.projects.pluck(:id)).to include(public_project.id)
            end
          end
        end

        describe 'and user does not have push access' do
          let(:router) { lfs_router_forked_auth }

          it_behaves_like 'forbidden'
        end
      end

      context 'when CI is authenticated' do
        let(:router) { lfs_router_forked_ci_auth }

        it_behaves_like 'unauthorized'
      end

      context 'for unauthenticated' do
        let(:router) { lfs_router_forked_noauth }

        it_behaves_like 'unauthorized'
      end

      describe 'and second project not related to fork or a source project' do
        let(:second_project) { create(:project) }
        let(:lfs_router_second_project) { new_lfs_router(second_project, user: user) }

        before do
          public_project.lfs_objects << lfs_object
          headers_for_upload_finalize(second_project)
        end

        context 'when pushing the same lfs object to the second project' do
          before do
            second_project.team << [user, :master]
          end

          it 'responds with 200 and links the lfs object to the project' do
            expect(lfs_router_second_project.try_call.first).to eq(200)
            expect(lfs_object.projects.pluck(:id)).to include(second_project.id, public_project.id)
          end
        end
      end
    end
  end

  def enable_lfs
    allow(Gitlab.config.lfs).to receive(:enabled).and_return(true)
  end

  def authorize(user)
    ActionController::HttpAuthentication::Basic.encode_credentials(user.username, user.password)
  end

  def new_lfs_router(project, user: nil, ci: false)
    Gitlab::Lfs::Router.new(project, user, ci, request)
  end

  def header_for_upload_authorize(project)
    env["PATH_INFO"] = "#{project.repository.path_with_namespace}.git/gitlab-lfs/objects/#{sample_oid}/#{sample_size}/authorize"
  end

  def headers_for_upload_finalize(project)
    env["PATH_INFO"] = "#{project.repository.path_with_namespace}.git/gitlab-lfs/objects/#{sample_oid}/#{sample_size}"
    env["HTTP_X_GITLAB_LFS_TMP"] = "#{sample_oid}6e561c9d4"
  end

  def fork_project(project, user, object = nil)
    allow(RepositoryForkWorker).to receive(:perform_async).and_return(true)
    Projects::ForkService.new(project, user, {}).execute
  end
end