why upload_pass_form_field does not work

[chenm0520]

the version of nginx is 1.22.0 and use the lastest nginx-upload-module,this is my nignx conf:
`

     location /upload/ {
    # Pass altered request body to this location
    upload_pass /deal.php;
    # Store files to this directory
    # The directory is hashed, subdirectories 0 1 2 3 4 5 6 7 8 9 should exist
    upload_store /home/www/upload;

    # Allow uploaded files to be read only by user
    #upload_store_access www:r;

    # Set specified fields in request body
    upload_set_form_field $upload_field_name.name "$upload_file_name";
    upload_set_form_field $upload_field_name.content_type "$upload_content_type";
    upload_set_form_field $upload_field_name.path "$upload_tmp_path";

    # Inform backend about hash and size of a file
    upload_aggregate_form_field "$upload_field_name.md5" "$upload_file_md5";
    upload_aggregate_form_field "$upload_field_name.size" "$upload_file_size";

    upload_pass_form_field "^.*$";

    upload_cleanup 400 404 499 500-505;
}

`
the "deal.php" only prints the global variable $_REQUEST,
and I try to use POSTMAN to send the post request,get the following result:

since I set "upload_pass_form_field" with "^.*$",then all the post fields will be appended,why can't field of "submit" occur?

[amlan-sw]

I have same problem. I think the problem is nginx 1.22.0 now use PCRE2 as default regex engine and http_upload_module maybe must be update to follow new regex engine to prcess upload_pass_form_field.

for my need, I have "hack" solution to bypass upload_pass_form_field, meaning all form wiill be passed, maybe just like your configuration:

upload_pass_form_field "^.*$";

you just want to pass all form field

the patch: at file ngx_http_upload_module.c

line 1584:
before
if(pass_field && u->field_name.len != 0) {

just add:

pass_field = 1;

rebuild nginx and now all field will be pass, and for future nginx.conf, you don need use upload_pass_form_field

[chenm0520]

@amlan-sw ,I get it,thanks,at present only the case

[dup2]

You can also compile nginx without PCRE2 using --without-pcre2 and --with-ld-opt="-lpcre" to force PCRE usage. This restores the old regexp match behaviour