问题
I'm stuck on what to do for having image upload in froala editor. I have carrierwave working for uploading images to google cloud storage for other sections of my app and now I want to have image uploads in froala editor working as well.
Here is what I've done so far
Post image uplaoder
class PostImageUploader < CarrierWave::Uploader::Base
# Choose what kind of storage to use for this uploader:
storage :fog
# Override the directory where uploaded files will be stored.
# This is a sensible default for uploaders that are meant to be mounted:
def store_dir
"post-image"
end
# Add a white list of extensions which are allowed to be uploaded.
# For images you might use something like this:
def extension_white_list
%w(jpg jpeg gif png)
end
# Override the filename of the uploaded files:
# Avoid using model.id or version_name here, see uploader/store.rb for details.
def filename
"#{model.id}-#{original_filename}" if original_filename.present?
end
end
I made a post image model
class PostImage < ActiveRecord::Base
belongs_to :post
mount_uploader :image, PostImageUploader
validate :image_size
# Validates the size of an uploaded picture.
def image_size
if image.size > 5.megabytes
errors.add(:picture, "should be less than 5MB")
end
end
end
I made attach and detach methods in my post controller but i don't know what to put in them.
def attach
end
def detach
end
def image_params
params.require(:post_image).permit(:image)
end
Made routes to the attach and detach methods but they could be wrong because im not sure if I even need the methods.
match '/guides/:guide_id/posts/attach' => 'posts#attach', :via => :create, as: :attach_guide_post_image
match '/guides/:guide_id/posts/detach'=> 'posts#detach', :via => :delete, as: :detach_guide_post_image
my carriwewave initializer is setup and working (because I'm using it on other places on the site) so I dont think I need to add it in. And I dont think I need to add my post controller new and create methods, their pretty stock standard.
From here I went to the froala docs for image uploads, but I dont know what values to put in and which I do need and which I don't need. My questions are the comments written in capital letters.
<script>
$(function() {
$('.editor')
.froalaeditor({
// Set the image upload parameter.
imageUploadParam: 'image',
// 1. I'M GUESSING THIS IS THE PARAM PASSED
// Set the image upload URL.
imageUploadURL: <%= attach_guide_post_image_path =%>,
// 2. MADE THIS PATH IN THE ROUTES
// Set request type.
imageUploadMethod: 'POST',
// Set max image size to 5MB.
imageMaxSize: 5 * 1024 * 1024,
// Allow to upload PNG and JPG.
imageAllowedTypes: ['jpeg', 'jpg', 'png', 'gif']
})
.on('froalaEditor.image.beforeUpload', function (e, editor, images) {
// Return false if you want to stop the image upload.
//3. SO I PUT ERROR MESSAGE IN THESE?? IF SO SHOULD IT BE A POPUP OR TEXT ON THE SCREEN AND HOW
})
.on('froalaEditor.image.uploaded', function (e, editor, response) {
// Image was uploaded to the server.
})
.on('froalaEditor.image.inserted', function (e, editor, $img, response) {
// Image was inserted in the editor.
})
.on('froalaEditor.image.replaced', function (e, editor, $img, response) {
// Image was replaced in the editor.
})
.on('froalaEditor.image.error', function (e, editor, error, response) {
// Bad link.
else if (error.code == 1) { ... }
// No link in upload response.
else if (error.code == 2) { ... }
// Error during image upload.
else if (error.code == 3) { ... }
// Parsing response failed.
else if (error.code == 4) { ... }
// Image too text-large.
else if (error.code == 5) { ... }
// Invalid image type.
else if (error.code == 6) { ... }
// Image can be uploaded only to same domain in IE 8 and IE 9.
else if (error.code == 7) { ... }
// Response contains the original server response to the request if available.
});
});
</script>
This is what I got. I know basic JS and have been using rails for about 6 months so im fairly new to it. I have never done anything like this in rails and js and cant find a solid guide on it.
Above is what I got and im stuck. Would love some help on what needs to be done from there to get image uploads working.
回答1:
I struggled with this same problem and decided to bypass carrierwave entirely and just upload directly to S3 as follows:
$('.post-editor').froalaEditor({
toolbarBottom: true,
toolbarButtons: ['bold', 'italic', 'underline', 'fontFamily', 'fontSize', 'paragraphFormat', 'align', 'formatOL', 'formatUL', 'insertLink', 'insertImage', 'insertVideo'],
imageUploadToS3: {
bucket: "<%= @hash[:bucket] %>",
region: 's3-us-west-1',
keyStart: "<%= @hash[:key_start] %>",
callback: function (url, key) {},
params: {
acl: "<%= @hash[:acl] %>", // ACL according to Amazon Documentation.
AWSAccessKeyId: "<%= @hash[:access_key] %>", // Access Key from Amazon.
policy: "<%= @hash[:policy] %>", // Policy string computed in the backend.
signature: "<%= @hash[:signature] %>", // Signature computed in the backend.
}
}
})
Set up an initializer in config/initializers/AWS_CONFIG.rb:
AWS_CONFIG = {
'access_key_id' => ENV["S3_ACCESS_KEY"],
'secret_access_key' => ENV["S3_SECRET_KEY"],
'bucket' => 'froala-bucket',
'acl' => 'public-read',
'key_start' => 'uploads/'
}
Set up the Amazon signature in lib/amazon_signature.rb:
module AmazonSignature
extend self
def signature
Base64.encode64(
OpenSSL::HMAC.digest(
OpenSSL::Digest.new('sha1'),
AWS_CONFIG['secret_access_key'], self.policy
)
).gsub("\n", "")
end
def policy
Base64.encode64(self.policy_data.to_json).gsub("\n", "")
end
def policy_data
{
expiration: 10.hours.from_now.utc.iso8601,
conditions: [
["starts-with", "$key", AWS_CONFIG['key_start']],
["starts-with", "$x-requested-with", "xhr"],
["content-length-range", 0, 20.megabytes],
["starts-with", "$content-type", ""],
{bucket: AWS_CONFIG['bucket']},
{acl: AWS_CONFIG['acl']},
{success_action_status: "201"}
]
}
end
def data_hash
{:signature => self.signature, :policy => self.policy, :bucket => AWS_CONFIG['bucket'], :acl => AWS_CONFIG['acl'], :key_start => AWS_CONFIG['key_start'], :access_key => AWS_CONFIG['access_key_id']}
end
end
And finally call it in your PostsController:
before_action :set_hash_for_froala
...
def set_hash_for_froala
@hash = AmazonSignature::data_hash
end
This video was very helpful: http://rubythursday.com/episodes/ruby-snack-23-froala-wysiwyg-saving-images-on-amazon-s3
回答2:
I made this about an year ago. [Setting up Froala WYSIWYG editor with CarrierWave and Rails].
I'll try to answer this based on your case.
You can save the file in action attach in your post controller. I assume the model is "PostImage" with "image" attribute from your post. This is the controller looks like:
def attach
@postimage = PostImage.new
@postimage.image = params[:file]
@postimage.save
respond_to do |format|
format.json { render :json => { status: 'OK', link: @postimage.image.url}}
end
end
Simply call the method in your javascript initializer
<script>
$(function() {
$('.selector').froalaEditor({
// Set the image upload URL.
imageUploadURL: '<%= attach_guide_post_image_path =%>.json',
imageUploadMethod: 'POST'
})
}
</script>
Hope this helps.
回答3:
If you're using a froala gem, they have an issue open for this here https://github.com/froala/wysiwyg-rails/issues/22
回答4:
Try this ...............
In your routes.rb
resources :posts do
collection do
post :froala_image_upload
end
end
In your posts_controller.rb
def froala_image_upload
uploader = PostImageUploader.new
file = params[:file]
uploader.store!(file)
render json: { success: true }
rescue CarrierWave::IntegrityError => e
render json: { error: e.message }
end
**script will look like this ...**
<script>
$(function() {
$('.editor')
.froalaeditor({
imageUploadParam: 'image',
imageUploadURL: 'froala_image_upload',
imageMaxSize: 5 * 1024 * 1024,
imageAllowedTypes: ['jpeg', 'jpg', 'png', 'gif']
})
.on('froalaEditor.image.error', function (e, editor, error, response) {
// Response contains the original server response to the request if available.
});
});
</script>
Hope this will work for you.
来源：https://stackoverflow.com/questions/37518201/rails-4-how-to-have-image-upload-in-froala-editor-with-carrierwave