How do I upload an image with Sinatra (like Paperclip)?

[Tony Tony]

Hi all,

I need to upload an image from my local computer to a web server and
store the location in a database (similar to how Paperclip and
attachment_fu work) in Sinatra.

Any ideas on how to get this to work?


Thanks in advance,
Tony

 

[Marcos Vanetta]

[Note: parts of this message were removed to make it a legal post.]

If you use datamapper, there is an paperclip for datamapper!

regards!

 

[Tony Tony]

If you use datamapper, there is an paperclip for datamapper!

regards!

Thanks for the reply! I'm using ActiveRecord and wouldn't want to change
to Datamapper unless I HAD to. Thanks again, I'll look into it as soon
as I get a chance.


-Tony

 

[Brian Candler]

I need to upload an image from my local computer to a web server and
store the location in a database (similar to how Paperclip and
attachment_fu work) in Sinatra.

I don't know Paperclip or attachment_fu, but getting the attachment in
Sinatra is easy: you get an open tempfile that you read from.

Something like this (extracted from some working code but not tested in
isolation):

post '/upload' do
unless params[:file] &&
(tmpfile = params[:file][:tempfile]) &&
(name = params[:file][:filename])
@error = "No file selected"
return hamlupload)
end
STDERR.puts "Uploading file, original name #{name.inspect}"
while blk = tmpfile.read(65536)
# here you would write it to its final location
STDERR.puts blk.inspect
end
"Upload complete"
end

---------
%h1 Upload

%form{:action=>"/upload",:method=>"post",:enctype=>"multipart/form-data"}
%input{:type=>"file",:name=>"file"}
%input{:type=>"submit",:value=>"Upload"}

 

[Bin Bin]

I need to upload an image from my local computer to a web server and
store the location in a database (similar to how Paperclip and
attachment_fu work) in Sinatra.

I don't know Paperclip or attachment_fu, but getting the attachment in
Sinatra is easy: you get an open tempfile that you read from.

Something like this (extracted from some working code but not tested in
isolation):

post '/upload' do
unless params[:file] &&
(tmpfile = params[:file][:tempfile]) &&
(name = params[:file][:filename])
@error = "No file selected"
return hamlupload)
end
STDERR.puts "Uploading file, original name #{name.inspect}"
while blk = tmpfile.read(65536)
# here you would write it to its final location
STDERR.puts blk.inspect
end
"Upload complete"
end

---------
%h1 Upload

%form{:action=>"/upload",:method=>"post",:enctype=>"multipart/form-data"}
%input{:type=>"file",:name=>"file"}
%input{:type=>"submit",:value=>"Upload"}

That is helpful.Thank u so much

 

[Tony Tony]

Thank you Brian! I will give it a shot when I have some time and reply
here. Truly appreciate it!


-Tony

 

[Almaz Om]

phanks:

post '/upload' do
unless params[:file] &&
(tmpfile = params[:file][:tempfile]) &&
(name = params[:file][:filename])
@error = "No file selected"
return hamlupload)
end
directory = "public/files"
path = File.join(directory, name)
File.open(path, "wb") { |f| f.write(tmpfile.read) }
end

so will be better for me

 

[Brian Candler]

phanks:

post '/upload' do
unless params[:file] &&
(tmpfile = params[:file][:tempfile]) &&
(name = params[:file][:filename])
@error = "No file selected"
return hamlupload)
end
directory = "public/files"
path = File.join(directory, name)
File.open(path, "wb") { |f| f.write(tmpfile.read) }
end

so will be better for me

OK. Beware that f.write(tmpfile.read) will use as much RAM as the size
of the attachment. Hence the suggestion to read it in and write it out
in blocks of, say, 64K.

 

[Bohdan S.]

Brian Candler wrote in post #929342:

phanks:

post '/upload' do
unless params[:file] &&
(tmpfile = params[:file][:tempfile]) &&
(name = params[:file][:filename])
@error = "No file selected"
return hamlupload)
end
directory = "public/files"
path = File.join(directory, name)
File.open(path, "wb") { |f| f.write(tmpfile.read) }
end

so will be better for me

OK. Beware that f.write(tmpfile.read) will use as much RAM as the size
of the attachment. Hence the suggestion to read it in and write it out
in blocks of, say, 64K.

"f.write(tmpfile.read)"?? Why so complex?...

post '/upload' do
tempfile = params['file'][:tempfile]
filename = params['file'][:filename]
File.copy(tempfile.path, "./files/#{filename}")
redirect '/'
end

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