Gem 有木有同学使用过 carrierwave + grape 构造文件上传 api 的
我弄了一个，结果怎么都传不上去文件，很痛苦啊
post do
user = User.new
user.photo = params[:photo]
user.save
end
photo = {
"file_data": base64.encodestring(open("default.jpg", 'rb').read()),
"filename": "default.jpg",
}
然后用 python 送了个 photo 字段过去了……
你的做法，把二进制文件转换成 Base64 格式，然后附上文件名，Post 的方式发给 API，本身就是可行的，没有什么特别之处。
上传不上去的问题是什么？什么地方报错了？有没有 logs？
# -*- encoding: utf-8 -*-
require 'securerandom' unless defined?(::SecureRandom)
require 'mime/types' unless defined?(::MIME::Types)
module Helpers
module File
# 根据 RFC 2397 约定，将文件转字符
def file_encode(file_path)
return nil unless File.file?(file_path)
file = File.open(file_path, 'rb')
type = MIME::Types.type_for( File.basename(file_path) ).first.to_s
content = Base64.encode64( file.read )
return "data:#{type};base64,#{content}"
end
# 还原，文件信息
def file_for(file_enc, attr_name)
file_info = file_enc.match(/data:(.*);base64,([.\w\s\/\/+]*)/)
if file_info && file_info.size == 3
# 文件信息
type = file_info[1]
content = file_info[2]
# 找扩展名
mime_type = MIME::Types[file_info[1]].first
extname = mime_type.extensions.first
# 文件名
filename = SecureRandom.hex(10) + ".#{extname}"
return {
filename: filename,
type: type,
name: attr_name,
tempfile: file_restore(filename, content),
head: "Content-Disposition: form-data; name=\"#{attr_name}\"; filename=\"#{filename}\"\r\nContent-Type: #{type}\r\n"
}
end
return nil
end
# 还原，临时文件
def file_restore(filename, content)
temp_file = Tempfile.new(filename, binmode: true)
temp_file.write( Base64.decode64(content) )
temp_file.close
return temp_file
end
end
end
Grape:
desc "update student profile", :params => {
"profile[name]" => { desc: "student name" },
"profile[avatar]" => { desc: "student avatar, please send a File", type: "file" }
}
put "profile" do
current_user.student_profile.update_attributes!(params[:profile])
present(current_user, with: ::Entities::User)
end
Spec:
it "should update student avatar profile" do
avater_path = File.join(Rails.root, "spec/requests/api/GraduationIcon.png")
params = {
"profile[avatar]" => fixture_file_upload(avater_path, 'image/png')
}
put "/api/v1/students/profile.json", params, { "HTTP_X_USER_ACCESS_TOKEN" => @access_token }
response.code.should == '200'
response_body = JSON.parse(response.body)
@student.reload
@student.profile.avatar.file.filename.should == "GraduationIcon.png"
end