hashids.js
A small JavaScript class to generate YouTube-like hashids from one or many numbers. This is a client-side version of Node.js version.
JavaScript - Hashids generate short unique ids from integers. use in url shortening or as unique ids.
I will go ahead and apologize upfront as I am new to ruby and rails and I cannot for the life of me figure out how to implement using hashids in my project. The project is a simple image host. I have it already working using Base58 to encode the sql ID and then decode it in the controller. However I wanted to make the URLs more random hence switching to hashids.
I have placed the hashids.rb file in my lib directory from here: https://github.com/peterhellberg/hashids.rb
Now some of the confusion starts here. Do I need to initialize hashids on every page that uses hashids.encode and hashids.decode via
hashids = Hashids.new("mysalt")
I found this post (http://zogovic.com/post/75234760043/youtube-like-ids-for-your-activerecord-models) which leads me to believe I can put it into an initializer however after doing that I am still getting NameError (undefined local variable or method `hashids' for ImageManager:Class)
so in my ImageManager.rb class I have
require 'hashids'
class ImageManager
class << self
def save_image(imgpath, name)
mime = %x(/usr/bin/exiftool -MIMEType #{imgpath})[34..-1].rstrip
if mime.nil? || !VALID_MIME.include?(mime)
return { status: 'failure', message: "#{name} uses an invalid format." }
end
hash = Digest::MD5.file(imgpath).hexdigest
image = Image.find_by_imghash(hash)
if image.nil?
image = Image.new
image.mimetype = mime
image.imghash = hash
unless image.save!
return { status: 'failure', message: "Failed to save #{name}." }
end
unless File.directory?(Rails.root.join('uploads'))
Dir.mkdir(Rails.root.join('uploads'))
end
#File.open(Rails.root.join('uploads', "#{Base58.encode(image.id)}.png"), 'wb') { |f| f.write(File.open(imgpath, 'rb').read) }
File.open(Rails.root.join('uploads', "#{hashids.encode(image.id)}.png"), 'wb') { |f| f.write(File.open(imgpath, 'rb').read) }
end
link = ImageLink.new
link.image = image
link.save
#return { status: 'success', message: Base58.encode(link.id) }
return { status: 'success', message: hashids.encode(link.id) }
end
private
VALID_MIME = %w(image/png image/jpeg image/gif)
end
end
And in my controller I have:
require 'hashids'
class MainController < ApplicationController
MAX_FILE_SIZE = 10 * 1024 * 1024
MAX_CACHE_SIZE = 128 * 1024 * 1024
@links = Hash.new
@files = Hash.new
@tstamps = Hash.new
@sizes = Hash.new
@cache_size = 0
class << self
attr_accessor :links
attr_accessor :files
attr_accessor :tstamps
attr_accessor :sizes
attr_accessor :cache_size
attr_accessor :hashids
end
def index
end
def transparency
end
def image
#@imglist = params[:id].split(',').map{ |id| ImageLink.find(Base58.decode(id)) }
@imglist = params[:id].split(',').map{ |id| ImageLink.find(hashids.decode(id)) }
end
def image_direct
#linkid = Base58.decode(params[:id])
linkid = hashids.decode(params[:id])
file =
if Rails.env.production?
puts "#{Base58.encode(ImageLink.find(linkid).image.id)}.png"
File.open(Rails.root.join('uploads', "#{Base58.encode(ImageLink.find(linkid).image.id)}.png"), 'rb') { |f| f.read }
else
puts "#{hashids.encode(ImageLink.find(linkid).image.id)}.png"
File.open(Rails.root.join('uploads', "#{hashids.encode(ImageLink.find(linkid).image.id)}.png"), 'rb') { |f| f.read }
end
send_data(file, type: ImageLink.find(linkid).image.mimetype, disposition: 'inline')
end
def upload
imgparam = params[:image]
if imgparam.is_a?(String)
name = File.basename(imgparam)
imgpath = save_to_tempfile(imgparam).path
else
name = imgparam.original_filename
imgpath = imgparam.tempfile.path
end
File.chmod(0666, imgpath)
%x(/usr/bin/exiftool -all= -overwrite_original #{imgpath})
logger.debug %x(which exiftool)
render json: ImageManager.save_image(imgpath, name)
end
private
def save_to_tempfile(url)
uri = URI.parse(url)
http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = uri.scheme == 'https'
http.start do
resp = http.get(uri.path)
file = Tempfile.new('urlupload', Dir.tmpdir, :encoding => 'ascii-8bit')
file.write(resp.body)
file.flush
return file
end
end
end
Then in my image.html.erb view I have this:
<%
@imglist.each_with_index { |link, i|
id = hashids.encode(link.id)
ext = link.image.mimetype.split('/')[1]
if ext == 'jpeg'
ext = 'jpg'
end
puts id + '.' + ext
%>
Now if I add
hashids = Hashids.new("mysalt")
in ImageManager.rb main_controller.rb and in my image.html.erb I am getting this error:
ActionView::Template::Error (undefined method `id' for #<Array:0x000000062f69c0>)
So all in all implementing hashids.encode/decode is not as easy as implementing Base58.encode/decode and I am confused on how to get it working... Any help would be greatly appreciated.
Source: (StackOverflow)
I'm grabbing a set of tasks from a database as an eloquent collection, then I'm sending the collection to my view where I do a foreach
. No problems here. Except, I need to reference the task id
in my view (url action, etc.). But I obviously don't want this in the source, so I'm using this library to hash the id. But doing this in the view seems wrong.
Is there any way to hash the id in the model or controller?
Here's how I'm calling the collection in my controller:
$tasks = Auth::user()->tasks()->orderBy('created_at', 'desc')->get();
This is how I'm currently hashing the id in my view:
<a rel='nofollow' href="{{ route('tasks.markascompleted', Hashids::encode($task->id)) }}">
Any help?
Source: (StackOverflow)
got a problem...
I can't understand it
I made a custom type for my IDs
type ID uint
func (id ID) MarshalJSON() ([]byte, error) {
e, _ := HashIDs.Encode([]int{int(id)})
fmt.Println(e) /// 34gj
return []byte(e), nil
}
func (id *ID) Scan(value interface{}) error {
*id = ID(value.(int64))
return nil
}
I use HashIDs package to encode my ids so that user wont be able to read them on client side. but I'm getting this error:
json: error calling MarshalJSON for type types.ID: invalid character 'g' after top-level value
Source: (StackOverflow)
I am using Hashid to hide the id of a resource in Laravel 5.
Here is the route bind in the routes file:
Route::bind('schedule', function($value, $route)
{
$hashids = new Hashids\Hashids(env('APP_KEY'),8);
if( isset($hashids->decode($value)[0]) )
{
$id = $hashids->decode($value)[0];
return App\Schedule::findOrFail($id);
}
App::abort(404);
});
And in the model:
public function getRouteKey()
{
$hashids = new \Hashids\Hashids(env('APP_KEY'),8);
return $hashids->encode($this->getKey());
}
Now this works fine the resource displays perfectly and the ID is hashed.
BUT when I go to my create route, it 404's - if I remove App::abort(404) the create route goes to the resource 'show' view without any data...
Here is the Create route:
Route::get('schedules/create', [
'uses' => 'SchedulesController@create',
'as' => 'schedules.create'
]);
The Show route:
Route::get('schedules/{schedule}', [
'uses' => 'Schedules Controller@show',
'as' => 'schedules.show'
]);
I am also binding the model to the route:
Route::model('schedule', 'App\Schedule');
Any ideas why my create view is not showing correctly? The index view displays fine.
Source: (StackOverflow)
I'm trying to use the hashids plugin to hash ticket_id
within a for loop.
for (var i = 0; i < result.length; i++) {
var hashids = new Hashids("", 5);
var id = hashids.encode(result[i].ticket_id);
console.log(hashids);
[...]
html += '<tr class="ticketClick" data-url="' + baseURL + id>' [...]
}
HTML for a table is dynamically generated based on the result
passed by an ajax call. When the table row is clicked I redirect to the url in the data-url attribute.
The problem is that hashids doesn't run and therefore id
isn't being appended to the url.
The console log of hashids
produces:
Hashids {version: "1.0.2", minAlphabetLength: 16, sepDiv: 3.5, guardDiv: 12, errorAlphabetLength: "error: alphabet must contain at least X unique characters"…}
I've searched for the error and didn't find anything...
What I find strange is that if I pass an integer directly into the hashids method like:
var id = hashids.encode(20);
The encode works and returns the expected hash.
A console.log of result[i].ticket_id
returns the expected integer, so the for loop is doing it's job properly. Declaring new Hashids()
outside the for
loop doesn't seem to make a difference. So I'm not sure what's going wrong here. Any suggestions?
Source: (StackOverflow)