libcrails-attachment

The Crails::Attachment class can help you attach stored files to your application models.

Usage

The following example shows how you can store files your Crails server receives by using the Attachment class:

#include <crails/router.hpp>
#include <crails/attachment.hpp>
#include <iostream>

// The following global must be declared in your crails application:
const std::string Crails::Attachment::default_store_path = "/tmp";

void Crails::Router::initialize()
{
  match("GET", "/upload", [](Crails::Context& context, std::function<void()> callback)
  {
    Crails::Attachment attachment;
    Crails::Params::File* file = context.params["multipart_field_name"];

    if (file)
    {
      attachment.use_uploaded_file(file);
      // The file is now stored on hard drive. We will now display its absolute path:
      std::cout << "File stored at: " << attachment.get_path() << std::endl;
      // The attachment class stores an UID that you may use later to find back the file: 
      std::cout << "File UID: " << attachment << std::endl;
    }
    else
      std::cout << "No file sent" << std::endl;
    callback();
  });
}

You can also override the default storepath by inheriting from Attachment:

class MyAttachment : public Crails::Attachment
{
  std::string get_default_store_path() const override
  {
    return "/srv/file_storage";
  }
};