OpenEuphoria

Re: Get images or binary files from web form

• Posted by jmduro Aug 16, 2022
• 1828 views

Thanks Greg,

I have not been able to get it work. However, following code works on Linux:

with batch 
 
include std/io.e 
include std/pretty.e 
include std/get.e 
include std/convert.e 
include std/sequence.e  -- split 
include std/text.e  -- dequote 
 
-- if val is a string, return it, otherwise "Undefined" 
function test_val(object val) 
    if atom(val) then 
        return "Undefined" 
    elsif object(val) then 
        for i = 1 to length(val) do 
            if not atom(val[i]) then 
                return "Invalid string sequence" 
            end if 
        end for 
        return val 
    else 
        return "Invalid type for string" 
    end if 
    return "foozle" -- never reached 
end function 
 
puts(1, "Content-Type: text/plain\n\n") 
sequence fname = "" 
sequence content_size = test_val(getenv("CONTENT_LENGTH")) 
sequence std_input = get_bytes(0, to_integer(content_size)) 
 
sequence boundary = {} 
for n = 1 to length(std_input) do 
  if equal(std_input[n..n+3], "\r\n\r\n") then 
    sequence s = std_input[1..n-1] 
    boundary = split(s, "\r\n") 
    std_input = remove(std_input, 1, n+3) 
    s = split(boundary[2], "filename=") 
    fname = dequote(s[2]) 
    exit 
  end if 
end for 
integer p = match("\r\n" & boundary[1], std_input) 
write_file("/tmp/" & fname, std_input[1..p-1]) 
 
printf(1, "Received %s bytes\n", {content_size}) 
printf(1, "Written %s (%d bytes)", {fname, length(std_input[1..p-1])}) 

POST response is:

Received 29044 bytes 
Written bloatbox.zip (28840 bytes) 

File is correctly written in /tmp:

root@cpe-tests-tool-JM:/var/www/html# ls -l /tmp/bloatbox.zip 
-rw-r--r-- 1 www-data www-data 28840 Aug 16 11:14 /tmp/bloatbox.zip 
root@cpe-tests-tool-JM:/var/www/html# unzip -l /tmp/bloatbox.zip 
Archive:  /tmp/bloatbox.zip 
  Length      Date    Time    Name 
---------  ---------- -----   ---- 
   159744  2021-05-24 11:50   Bloatbox.exe 
        0  2021-05-24 11:50   de/ 
     8192  2021-05-24 11:50   de/Bloatbox.resources.dll 
---------                     ------- 
   167936                     3 files 

Jean-Marc