我有一个rails应用程序,我收到一个base64编码的字符串,它是来自ios应用程序的图像。
我正在尝试将其转换为回形针图像。
到目前为止,我有:
module Api
module V1
class MyController < BaseController
def image_build
begin
token = request.headers["HTTP_TOKEN"]
@user = User.find_by(user_token: token)
@decoded_image = Base64.decode64(params[:image_data])
puts @decoded_image[0, 50]
@new_stand = Stand.create(:user_id => @user.id, :avatar => @decoded_image)
...
输出:
iVBORw0KGgoAAAANSUhEUgAAAPsAAACxCAYAAAACscusAAAAAX
�PNG
IHDR��ˬsRGB���
Completed 500 Internal Server Error in 90ms (Views: 3.1ms | ActiveRecord: 1.1ms)
如何在base中将base64字符串转换为正确的图像文件?我从这个宝石上运行了回形针:
gem "paperclip", git: "git://github.com/thoughtbot/paperclip.git"
备注
发送的图像可以是来自ios手机的任何图像,因此类型可以更改。我想支持.gif,.png,.jpg和jpeg。
在IOS中,我发送了以下信息:
@IBOutlet var image: UIImage
@IBAction func Build(sender: AnyObject) {
let image_data = UIImagePNGRepresentation(image.image!)
self.service.createNewImage(notifier: notifier, image: image_data!)
}
then
let strBase64:String = image.base64EncodedStringWithOptions(.Encoding64CharacterLineLength)
let dataDictionary = ["image_data": strBase64]
self.post("image/build", data: dataDictionary).responseJSON
编辑1
我已经开始尝试使用paperclip io适配器,但它仍然出错。这就是我到目前为止所做的:
@new_image = Stand.create(:user_id => @user.id)
encoded_picture = params[:image_data]
content_type = "image/jpg"
puts "HERE 1"
image = Paperclip.io_adapters.for("data:#{content_type};base64,#{encoded_picture}")
puts "HERE 2"
image.original_filename = "new_image.jpg"
puts "HERE 3"
@new_image.avatar = image
puts "HERE 4"
@new_image.cover_image_url = @new_image.avatar.url
puts "HERE 5"
@new_image.save
此代码提供了以下错误:
HERE 1
HERE 2
HERE 3
Command :: file -b --mime '/tmp/082995477845923f853c5a48cc6e3cae20160712-26217-s1dngb.jpg'
Command :: identify -format '%wx%h,%[exif:orientation]' '/tmp/8d777f385d3dfec8815d20f7496026dc20160712-26217-1ht7ijm[0]' 2>/dev/null
Command :: identify -format %m '/tmp/8d777f385d3dfec8815d20f7496026dc20160712-26217-1ht7ijm[0]'
Command :: convert '/tmp/8d777f385d3dfec8815d20f7496026dc20160712-26217-1ht7ijm[0]' -auto-orient -resize "160x160>" '/tmp/4a98b13d8ce55141b173bb0ed5cb181220160712-26217-17sazsk'
Command :: identify -format '%wx%h,%[exif:orientation]' '/tmp/8d777f385d3dfec8815d20f7496026dc20160712-26217-1ht7ijm[0]' 2>/dev/null
Command :: identify -format %m '/tmp/8d777f385d3dfec8815d20f7496026dc20160712-26217-1ht7ijm[0]'
Command :: convert '/tmp/8d777f385d3dfec8815d20f7496026dc20160712-26217-1ht7ijm[0]' -auto-orient -resize "40x40>" '/tmp/4a98b13d8ce55141b173bb0ed5cb181220160712-26217-fhdb0w'
HERE 4
Completed 500 Internal Server Error in 654ms (Views: 2.5ms | Searchkick: 15.6ms | ActiveRecord: 7.3ms)
答案 0 :(得分:1)
您可以在paperclip's
存储库中找到许多有用的信息,对于您的问题,我发现了这一点:
3.5.0:
- 功能:将Base64编码的数据URI处理为上传
Paperclip::DataUriAdapter
处理base64-encoded
个数据。
正常工作:
class Photo < ActiveRecord::Base
before_validation :set_image
has_attached_file :image
def set_image
StringIO.open(Base64.decode64(image_json)) do |str|
decorate_str(str)
str.original_filename = "THE_NAME_OF_FILE.jpg"
str.content_type = "image/jpeg"
self.image = data
end
end
def decorate_str(str)
str.class.class_eval { attr_accessor :original_filename, :content_type }
end
end
解决问题的方法类似于here。
答案 1 :(得分:0)
这似乎有效,但我仍在努力测试不同的图像类型。
@new_image = Stand.create(:user_id => @user.id)
encoded_picture = params[:image_data]
content_type = "image/jpg"
image = Paperclip.io_adapters.for("data:#{content_type};base64,#{encoded_picture}")
image.original_filename = "new_image.jpg"
@new_image.avatar = image
@new_image.save
@new_image.cover_image_url = @new_image.avatar.url
@new_image.save
我赞成以前的答案,因为它帮助我找到了其他资源,但它没有包含我的方案的答案。