OpenEuphoria

1. Receiving a POSTed file

• Posted by bugmagnet May 06, 2014
• 1566 views

Is there any code out there implementing the receipt of a POSTed file? I can see in the docs the mechanism to issue GET and POST but not to respond on the server's side.

Bugmagnet

3. Re: Receiving a POSTed file

• Posted by bugmagnet May 06, 2014
• 1567 views

Actually, I'm running under IIS, but I'll port that code and see how I go.

Thanks.
bugmagnet

5. Re: Receiving a POSTed file

• Posted by bugmagnet May 06, 2014
• 1479 views

include std/regex.e as re 
include std/pretty.e 
 
object r = re:new("(.+?)\r\nContent-Disposition: (.+?); name=\"(.+?)\"; filename=\"([^\"]+?)\"\r\nContent-Type: (.+?)\r\n") 
object matches = re:all_matches(r , "------WebKitFormBoundarylHdLZsq10IBUKBPg\r\n" &  
"Content-Disposition: form-data; name=\"file\"; filename=\"Jen.docx\"\r\n" & 
"Content-Type: application/vnd.openxmlformats-officedocument.wordprocessingml.document\r\n") 
pretty_print( 1, matches, {2}) 

Ok, that wasn't too hard. Was a bit taken aback by the absence of some regular expression syntax (like \S) but the above works and gives

{ 
  { 
    "------WebKitFormBoundarylHdLZsq10IBUKBPg\r\nContent-Disposition: form-data; name=\"file\"; filename=\"Jen.docx\"\r\nContent-Type: application/vnd.openxmlformats-officedocument.wordprocessingml.document\r\n", 
    "------WebKitFormBoundarylHdLZsq10IBUKBPg", 
    "form-data", 
    "file", 
    "Jen.docx", 
    "application/vnd.openxmlformats-officedocument.wordprocessingml.document" 
  } 
} 

So I can recover the filename and content-type, and then remove the matched header from the data which was what I was after.

Am about to find out how big a file I upload with this.

Thanks again,
bugmagnet

7. Re: Receiving a POSTed file

• Posted by bugmagnet May 06, 2014
• 1471 views

Okay, it's stopped working completely and I can't figure out why. I get either 404 or 502 errors. Just now I tried sending a 2GB ISO file and crashed Firefox completely (pretty cool, no?)

If anyone's got an idea why this is failing, please post.

include std/io.e  
include std/get.e  
include std/regex.e as re 
include std/pretty.e 
include std/sequence.e 
 
puts(1, "Content-type: text/text\r\n\r\n")  
  
object nbytes, data  
nbytes = getenv("CONTENT_LENGTH")  
if atom(nbytes) then  
	puts(1, "failure")  
	abort(0)  
end if  
nbytes = value(nbytes)  
nbytes = nbytes[2]  
if sequence(nbytes) or nbytes < 1 then  
	puts(1, "failed")  
	abort(0)  
end if  
  
data = get_bytes(0,nbytes)  
 
object r = re:new("(.+?)\r\nContent-Disposition: (.+?); name=\"(.+?)\"; filename=\"([^\"]+?)\"\r\nContent-Type: (.+?)\r\n") 
 
object matches = re:all_matches(r , data) 
  
integer fn = open(matches[5], "w")  
if fn = -1 then  
	puts(1, "fail")  
	abort(0)  
end if  
puts(fn, slice(data, length(matches[1])+1))  
close(fn)  
  
puts(1, "success")  
 

bugmagnet

9. Re: Receiving a POSTed file

• Posted by gbonvehi May 07, 2014
• 1489 views

Glad you're sorting this out.

The requests limits (if you've permission on your server) can be modified using a simple web.config. You can find an example here: http://stackoverflow.com/questions/3853767/maximum-request-length-exceeded

Depending on the version of IIS and processes allowed RAM, request timeout, etc you may hit other limits which very large files.

11. Re: Receiving a POSTed file

• Posted by bugmagnet May 07, 2014
• 1474 views

Grrrrr ... even tried running the original script under eui.exe and putting the script into the action of the form, viz

<form id="file_upload_form" method="post" enctype="multipart/form-data" action="/eu-received.ex"> 
<input name="file" id="file" size="27" type="file" /><br /> 
<input type="submit" name="action" value="Upload" /><br /> 
</form> 

bugmagnet