discourse/app/models/user_avatar.rb

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# frozen_string_literal: true
class UserAvatar < ActiveRecord::Base
belongs_to :user
belongs_to :gravatar_upload, class_name: "Upload"
belongs_to :custom_upload, class_name: "Upload"
has_many :upload_references, as: :target, dependent: :destroy
after_save do
if saved_change_to_custom_upload_id? || saved_change_to_gravatar_upload_id?
upload_ids = [self.custom_upload_id, self.gravatar_upload_id]
UploadReference.ensure_exist!(upload_ids: upload_ids, target: self)
end
end
@@custom_user_gravatar_email_hash = {
Discourse::SYSTEM_USER_ID => User.email_hash("info@discourse.org"),
}
def self.register_custom_user_gravatar_email_hash(user_id, email)
@@custom_user_gravatar_email_hash[user_id] = User.email_hash(email)
end
def contains_upload?(id)
gravatar_upload_id == id || custom_upload_id == id
end
def update_gravatar!
DistributedMutex.synchronize("update_gravatar_#{user_id}") do
begin
self.update!(last_gravatar_download_attempt: Time.zone.now)
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max = Discourse.avatar_sizes.max
# The user could be deleted before this executes
return if user.blank? || user.primary_email.blank?
email_hash = @@custom_user_gravatar_email_hash[user_id] || user.email_hash
gravatar_url =
"https://#{SiteSetting.gravatar_base_url}/avatar/#{email_hash}.png?s=#{max}&d=404&reset_cache=#{SecureRandom.urlsafe_base64(5)}"
if SiteSetting.verbose_upload_logging
Rails.logger.warn("Verbose Upload Logging: Downloading gravatar from #{gravatar_url}")
end
# follow redirects in case gravatar change rules on us
tempfile =
FileHelper.download(
gravatar_url,
max_file_size: SiteSetting.max_image_size_kb.kilobytes,
tmp_file_name: "gravatar",
skip_rate_limit: true,
verbose: false,
follow_redirect: true,
)
if tempfile
ext = File.extname(tempfile)
ext = ".png" if ext.blank?
upload =
UploadCreator.new(
tempfile,
"gravatar#{ext}",
origin: gravatar_url,
type: "avatar",
for_gravatar: true,
).create_for(user_id)
if gravatar_upload_id != upload.id
User.transaction do
if gravatar_upload_id && user.uploaded_avatar_id == gravatar_upload_id
user.update!(uploaded_avatar_id: upload.id)
end
self.update!(gravatar_upload: upload)
end
end
end
rescue OpenURI::HTTPError => e
raise e if e.io&.status[0].to_i != 404
ensure
tempfile&.close!
end
end
end
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def self.local_avatar_url(hostname, username, upload_id, size)
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self.local_avatar_template(hostname, username, upload_id).gsub("{size}", size.to_s)
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end
def self.local_avatar_template(hostname, username, upload_id)
version = self.version(upload_id)
"#{Discourse.base_path}/user_avatar/#{hostname}/#{username}/{size}/#{version}.png"
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end
def self.external_avatar_url(user_id, upload_id, size)
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self.external_avatar_template(user_id, upload_id).gsub("{size}", size.to_s)
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end
def self.external_avatar_template(user_id, upload_id)
version = self.version(upload_id)
"#{Discourse.store.absolute_base_url}/avatars/#{user_id}/{size}/#{version}.png"
end
def self.version(upload_id)
"#{upload_id}_#{OptimizedImage::VERSION}"
end
def self.import_url_for_user(avatar_url, user, options = nil)
if SiteSetting.verbose_upload_logging
Rails.logger.warn("Verbose Upload Logging: Downloading sso-avatar from #{avatar_url}")
end
tempfile =
FileHelper.download(
avatar_url,
max_file_size: SiteSetting.max_image_size_kb.kilobytes,
tmp_file_name: "sso-avatar",
follow_redirect: true,
)
return unless tempfile
ext = FastImage.type(tempfile).to_s
tempfile.rewind
upload =
UploadCreator.new(
tempfile,
"external-avatar." + ext,
origin: avatar_url,
type: "avatar",
).create_for(user.id)
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user.create_user_avatar! unless user.user_avatar
if !user.user_avatar.contains_upload?(upload.id)
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user.user_avatar.update!(custom_upload_id: upload.id)
override_gravatar = !options || options[:override_gravatar]
if user.uploaded_avatar_id.nil? ||
!user.user_avatar.contains_upload?(user.uploaded_avatar_id) || override_gravatar
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user.update!(uploaded_avatar_id: upload.id)
end
end
rescue Net::ReadTimeout, OpenURI::HTTPError, FinalDestination::SSRFError
# Skip saving. We are not connected to the net, or SSRF checks failed.
ensure
tempfile.close! if tempfile && tempfile.respond_to?(:close!)
end
def self.ensure_consistency!
DB.exec <<~SQL
UPDATE user_avatars
SET gravatar_upload_id = NULL
WHERE gravatar_upload_id IN (
SELECT u1.gravatar_upload_id FROM user_avatars u1
LEFT JOIN uploads up
ON u1.gravatar_upload_id = up.id
WHERE u1.gravatar_upload_id IS NOT NULL AND
up.id IS NULL
)
SQL
DB.exec <<~SQL
UPDATE user_avatars
SET custom_upload_id = NULL
WHERE custom_upload_id IN (
SELECT u1.custom_upload_id FROM user_avatars u1
LEFT JOIN uploads up
ON u1.custom_upload_id = up.id
WHERE u1.custom_upload_id IS NOT NULL AND
up.id IS NULL
)
SQL
end
end
# == Schema Information
#
# Table name: user_avatars
#
# id :integer not null, primary key
# user_id :integer not null
# custom_upload_id :integer
# gravatar_upload_id :integer
# last_gravatar_download_attempt :datetime
# created_at :datetime not null
# updated_at :datetime not null
#
# Indexes
#
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# index_user_avatars_on_custom_upload_id (custom_upload_id)
# index_user_avatars_on_gravatar_upload_id (gravatar_upload_id)
# index_user_avatars_on_user_id (user_id)
#