Re: Get images or binary files from web form
- Posted by ghaberek (admin) Oct 08, 2022
- 1491 views
achury said...
Just needed to add platform(), so don't try to run windows specific code on linux machines.
You should be using ifdef instead of platform(). Here's an updated example that uses ifdef to only provide set_mode() on Windows.
#!"C:\Euphoria\bin\eui.exe" include std/io.e include std/convert.e include std/dll.e without warning += { override } with batch ifdef WINDOWS then constant msvcrt = open_dll( "msvcrt.dll" ) constant _setmode = define_c_func( msvcrt, "_setmode", {C_INT,C_INT}, C_INT ) constant O_BINARY = 0x008000 function set_mode( integer fn, integer mode ) return c_func( _setmode, {fn,mode} ) end function end ifdef override function getenv( sequence name, object default="" ) object value = eu:getenv( name ) if equal( value, -1 ) then return default end if if atom( default ) then value = to_number( value ) end if return value end function printf( STDOUT, "Content-type: text/html\n\n" ) printf( STDOUT, "<html><head></head><body>\n" ) printf( STDOUT, "<form method=\"post\" action=\"/cgi-bin/upload.esp\" enctype=\"multipart/form-data\">\n" ) printf( STDOUT, "Your text: <input name=\"text\" /><br>\n" ) printf( STDOUT, "Your file: <input type=\"file\" name=\"file\" accept=\"image/png, .jpeg, .jpg, image/gif\"><br>\n" ) printf( STDOUT, "<input type=\"submit\" /></form>\n" ) sequence request_method = getenv( "REQUEST_METHOD" ) if equal( request_method, "POST" ) then sequence content_type = getenv( "CONTENT_TYPE" ) integer content_length = getenv( "CONTENT_LENGTH", 0 ) printf( STDOUT, "<pre><code>\n" ) printf( STDOUT, "CONTENT_TYPE = \"%s\"\n", {content_type} ) printf( STDOUT, "CONTENT_LENGTH = %d\n", {content_length} ) printf( STDOUT, "REQUEST_METHOD = \"%s\"\n", {request_method} ) printf( STDOUT, "</code></pre>\n" ) ifdef WINDOWS then set_mode( STDIN, O_BINARY ) end ifdef sequence bytes = get_bytes( STDIN, content_length ) printf( STDOUT, "<p>Received %d bytes!</p>\n", {length(bytes)} ) end if printf( 1, "</body></html>\n" )
achury said...
I am also learning about how to parse form response.
https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Disposition
Would be nice to have on standar lib a clever function may scan the binary input, from any web form, separate chunks using boundary, read the Content-Disposition on each section to define how to scan it.
I do plan to add this to Euphoria MVC, although in time I may end up ingesting that entire project into Euphoria standard library.
-Greg
