using ynh_local_curl

replaced direct call of curl by ynh_local_curl.

placed local development version of ynh_local_curl and ynh_handle_getopts_args
in their own files

scripts/_common.sh

@@ -1,5 +1,7 @@
 #!/bin/bash
 
+
+
 #=================================================
 # COMMON VARIABLES
 #=================================================
@@ -46,480 +48,18 @@ flohmarkt_old_service="flohmarkt"
 # PERSONAL HELPERS
 #=================================================
 
-# debug output
+# debug output for ynh_handle_getopts_args and ynh_local_curl
+# otherwise not needed TODO delete after development of the two is done
 flohmarkt_debug=0
 flohmarkt_print_debug() {
     set +x
     if [[ $flohmarkt_debug -eq 1 ]]; then echo "flohmarkt_debug: $*" >&2; fi
     set -x
 }
-
-# Redisgn of ynh_handle_getopts_args for flohmarkt to be tested as `flohmarkt_ynh_handle_getopts_args`
-# Internal helper design to allow helpers to use getopts to manage their arguments
-#
-# [internal]
-#
-# example: function my_helper()
-# {
-#     local -A args_array=( [a]=arg1= [b]=arg2= [c]=arg3 )
-#     local arg1
-#     local arg2
-#     local arg3
-#     ynh_handle_getopts_args "$@"
-#
-#     [...]
-# }
-# my_helper --arg1 "val1" -b val2 -c
-#
-# usage: ynh_handle_getopts_args "$@"
-# | arg: $@    - Simply "$@" to tranfert all the positionnal arguments to the function
-#
-# This helper need an array, named "args_array" with all the arguments used by the helper
-#   that want to use ynh_handle_getopts_args
-# Be carreful, this array has to be an associative array, as the following example:
-# local -A args_array=( [a]=arg1 [b]=arg2= [c]=arg3 )
-# Let's explain this array:
-# a, b and c are short options, -a, -b and -c
-# arg1, arg2 and arg3 are the long options associated to the previous short ones. --arg1, --arg2 and --arg3
-# For each option, a short and long version has to be defined.
-# Let's see something more significant
-# local -A args_array=( [u]=user [f]=finalpath= [d]=database )
-#
-# NB: Because we're using 'declare' without -g, the array will be declared as a local variable.
-#
-# Please keep in mind that the long option will be used as a variable to store the values for this option.
-# For the previous example, that means that $finalpath will be fill with the value given as argument for this option.
-#
-# Also, in the previous example, finalpath has a '=' at the end. That means this option need a value.
-# So, the helper has to be call with --finalpath /final/path, --finalpath=/final/path or -f /final/path, 
-# the variable $finalpath will get the value /final/path
-# If there's many values for an option, -f /final /path, the value will be separated by a ';' $finalpath=/final;/path
-# For an option without value, like --user in the example, the helper can be called only with --user or -u. $user 
-# will then get the value 1.
-#
-# To keep a retrocompatibility, a package can still call a helper, using getopts, with positional arguments.
-# The "legacy mode" will manage the positional arguments and fill the variable in the same order than they are given 
-# in $args_array. e.g. for `my_helper "val1" val2`, arg1 will be filled with val1, and arg2 with val2.
-
-# Positional parameters (used to be the only way to use ynh_handle_getopts_args once upon a time) can be 
-# used also:
-# 
-# '--'          start processing the rest of the arguments as positional parameters
-# $legacy_args  The arguments positional parameters will be assign to
-#               Needs to be composed of array keys of args_array. If a key for a predefined variable
-#               is used multiple times the assigned values will be concatenated delimited by ';'.
-#               If the long option variable to contain the data is predefined as an array (e.g. using
-#               `local -a arg1` then multiple values will be assigned to its cells.
-#               If the last positional parameter defined in legacy_args is defined as an array all 
-#               the leftover positional parameters will be assigned to its cells.
-#               (it is named legacy_args, because the use of positional parameters was about to be
-#               deprecated before the last re-design of this sub)
-#
-# Requires YunoHost version 3.2.2 or higher.
-# flohmarkt_ynh_handle_getopts_args() {
-# TODO testing:
-ynh_handle_getopts_args() {
-    # Manage arguments only if there's some provided
-    # TODO set +o xtrace # set +x
-    if [ $# -eq 0 ]; then
-      ynh_print_warn --message="ynh_handle_getopts_args called without arguments"
-      return
-    fi
-
-    # Store arguments in an array to keep each argument separated
-    local arguments=("$@")
-
-    # For each option in the array, reduce to short options for getopts (e.g. for [u]=user, --user will be -u)
-    # And built parameters string for getopts
-    # ${!args_array[@]} is the list of all option_flags in the array (An option_flag is 'u' in [u]=user, user is a value)
-    local getopts_parameters=""
-    local option_flag=""
-    ## go through all possible options and replace arguments with short versions
-    flohmarkt_print_debug "arguments = '${arguments[@]}"
-    flohmarkt_print_debug "args_array = (${!args_array[@]})"
-    for option_flag in "${!args_array[@]}"; do
-        # TODO refactor: Now I'm not sure anymore this part belongs here. To make the
-        # this all less hard to read and understand I'm thinking at the moment that it 
-        # would be good to split the different things done here into their own loops:
-        #
-        # 1. build the option string $getopts_parameters
-        # 2. go through the arguments and add empty arguments where needed to 
-        #    allow for cases like '--arg= --value' where 'value' is a valid option, too
-        # 3. replace long option names by short once
-        # 4. (possibly add empty parameters for '-a -v' in cases where -a expects a value
-        #    and -v is a valid option, too - but I dearly hope this will not be necessary)
-        flohmarkt_print_debug "option_flag = $option_flag"
-        # Concatenate each option_flags of the array to build the string of arguments for getopts
-        # Will looks like 'abcd' for -a -b -c -d
-        # If the value of an option_flag finish by =, it's an option with additionnal values. 
-        # (e.g. --user bob or -u bob)
-        # Check the last character of the value associate to the option_flag
-        flohmarkt_print_debug "compare to '${args_array[$option_flag]: -1}'"
-        if [ "${args_array[$option_flag]: -1}" = "=" ]; then
-            # For an option with additionnal values, add a ':' after the letter for getopts.
-            getopts_parameters="${getopts_parameters}${option_flag}:"
-        else
-            getopts_parameters="${getopts_parameters}${option_flag}"
-        fi
-        flohmarkt_print_debug "getopts_parameters = ${getopts_parameters}"
-        # Check each argument given to the function
-        local arg=""
-        # ${#arguments[@]} is the size of the array
-        ## for one possible option: look at each argument supplied:
-        for arg in $(seq 0 $((${#arguments[@]} - 1))); do
-            flohmarkt_print_debug "option_flag='$option_flag', arg = '$arg', argument = '${arguments[arg]}'"
-            # the following cases need to be taken care of
-            # '--arg=value'    → works
-            # '--arg= value'   → works
-            # '--arg=-value'   → works
-            # '--arg= -v'      or
-            # '--arg= --value' → works if not exists arg '[v]=value='
-            #                  → $arg will be set to '-v' or '--value'
-            #   but if exists '[v]=value=' this is not the expected behavior:
-            #   → then $arg is expected to contain an empty value and '-v' or '--value'
-            #     is expected to be interpreted as its own valid argument
-            #   (found in use of ynh_replace_string called by ynh_add_config)
-            #   solution:
-            #   insert an empty arg into array arguments to be later interpreted by 
-            #   getopts as the missing value to --arg=
-            if [[ -v arguments[arg+1] ]] && [[ ${arguments[arg]: -1} == '=' ]]; then
-                # arg ends with a '='
-                local this_argument=${arguments[arg]}
-                local next_argument=${arguments[arg+1]}
-                # for looking up next_argument in args_array remove optionally trailing '='
-                next_argument=$( printf '%s' "$next_argument" | cut -d'=' -f1 )
-                flohmarkt_print_debug "MISSING PARAMETER: this_argument='$this_argument', next_argument='$next_argument'"
-
-                # check if next_argument is a value in args_array
-                # → starts with '--' and the rest of the argument excluding optional trailing '=' 
-                #     of the string is a value in associative array args_array
-                # → or starts with '-' and the rest of the argument is a valid key in args_array
-                #   (long argument could already have been replaced by short version before)
-                flohmarkt_print_debug "args_array values='${args_array[@]}'"
-                flohmarkt_print_debug "args_array   keys='${!args_array[@]}'"
-                flohmarkt_print_debug "{next_argument:2}='${next_argument:2}'"
-                flohmarkt_print_debug "{next_argument:0:2}='${next_argument:0:2}'"
-                if ( [[ "${next_argument:0:2}" == '--' ]] \
-                    && printf '%s ' "${args_array[@]}" | fgrep -w "${next_argument:2}" > /dev/null ) \
-                || ( [[ "${next_argument:0:1}" == '-' ]] \
-                    && printf '%s ' "${!args_array[@]}" | fgrep -w "${next_argument:1:1}" > /dev/null )
-                then
-                    # insert an empty value to array arguments to be interpreted as the value
-                    # for argument[arg]
-                    arguments=( ${arguments[@]:0:arg+1} '' ${arguments[@]:arg+1})
-                    flohmarkt_print_debug "now arguments='${arguments[@]}'"
-                fi
-            fi
-
-            # Replace long option with = (match the beginning of the argument)
-            arguments[arg]="$(printf '%s\n' "${arguments[arg]}" \
-                | sed "s/^--${args_array[$option_flag]}/-${option_flag}/")"
-            # And long option without = (match the whole line)
-            arguments[arg]="$(printf '%s\n' "${arguments[arg]}" \
-                | sed "s/^--${args_array[$option_flag]%=}$/-${option_flag}/")"
-            flohmarkt_print_debug "                            arg = '$arg', argument = '${arguments[arg]}'"
-        done
-        flohmarkt_print_debug "====> end loop: arguments = '${arguments[@]}'"
-    done
-    flohmarkt_print_debug '================= end first loop ================='
-    
-    # Parse the first argument, return the number of arguments to be shifted off the arguments array
-    # The function call is necessary here to allow `getopts` to use $@
-    parse_arg() {
-        flohmarkt_print_debug "========= parse_arg started ======== , arguments='$@', getopts_parameters: '$getopts_parameters'"
-        # Initialize the index of getopts
-        OPTIND=1
-        # getopts will fill $parameter with the letter of the option it has read.
-        local parameter=""
-        getopts ":$getopts_parameters" parameter || true
-        flohmarkt_print_debug "after getopts - parameter='$parameter', OPTIND='${OPTIND:-none}', OPTARG='${OPTARG:-none}'"
-
-        if [ "$parameter" = "?" ]; then
-            ynh_die --message="Invalid argument: -${OPTARG:-}"
-            flohmarkt_print_debug "Invalid argument: -${OPTARG:-}"
-            exit 255
-        elif [ "$parameter" = ":" ]; then
-            ynh_die --message="-$OPTARG parameter requires an argument."
-            echo "-$OPTARG parameter requires an argument."
-            exit 255
-        else
-            # Use the long option, corresponding to the short option read by getopts, as a variable
-            # (e.g. for [u]=user, 'user' will be used as a variable)
-            # Also, remove '=' at the end of the long option
-            # The variable name will be stored in 'option_var' as a nameref
-            option_var="${args_array[$parameter]%=}"
-            flohmarkt_print_debug "option_var='$option_var'"
-            # if there's a '=' at the end of the long option name, this option takes values
-            if [ "${args_array[$parameter]: -1}" != "=" ]; then
-                # no argument expected for option - set option variable to '1'
-                option_value=1
-            else
-                # remove leading and trailing spaces from OPTARG
-                OPTARG="$( printf '%s' "${OPTARG}" | sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//')"
-                option_value="${OPTARG}"
-            fi
-            flohmarkt_print_debug "option_value='$option_value'"
-            # set shift_value according to the number of options interpreted by getopts
-            shift_value=$(( $OPTIND - 1 ))
-            flohmarkt_print_debug "shift_value='$shift_value'"
-        fi
-    }
-
-    # iterate over the arguments: if first argument starts with a '-' feed arguments to getopts
-    # if first argument doesn't start with a '-' enter mode to read positional parameters
-    local argument
-    local positional_mode=0 # state is getopts mode at the beginning, not positional parameters
-    local positional_count=0 # counter for positional parameters
-    local option_var=''   # the variable name to be filled
-    # Try to use legacy_args as a list of option_flag of the array args_array
-    # Otherwise, fill it with getopts_parameters to get the option_flag. 
-    # (But an associative arrays isn't always sorted in the correct order...)
-    # Remove all ':' in getopts_parameters, if used.
-    legacy_args=${legacy_args:-${getopts_parameters//:/}}
-    while [[ -v 'arguments' ]] && [[ ${#arguments} -ne 0 ]]; do
-        flohmarkt_print_debug '======= start while loop ======='
-        local shift_value=0
-        local option_value='' # the value to be filled into ${!option_var}
-        argument=${arguments[0]}
-        flohmarkt_print_debug "argument='$argument'"
-        # if state once changed to positional parameter mode, all the rest of the arguments will
-        # be interpreted in positional parameter mode even if they start with a '-'
-        if [ $positional_mode == 0 ] && [ "${argument}" == '--' ];then
-            flohmarkt_print_debug "found '--', start positional parameter mode"
-            positional_mode=1
-            shift_value=1
-        elif [ $positional_mode == 0 ] && [ "${argument:0:1}" == '-' ]; then
-            flohmarkt_print_debug "getopts, arguments='${arguments[@]}', starting parse_arg"
-            parse_arg "${arguments[@]}"
-        else
-            positional_mode=1 # set state to positional parameter mode
-            flohmarkt_print_debug "positional parameter, argument='$argument'"
-
-            # Get the option_flag from getopts_parameters by using the option_flag according to the 
-            # position of the argument.
-            option_flag=${legacy_args:$positional_count:1}
-
-            # increment counter for legacy_args if still args left. If no args left check if the 
-            # last arg is a predefined array and let it cells be filled. Otherwise complain and 
-            # return.
-            flohmarkt_print_debug "positional_counter='$positional_count', max positional_counter='$(( ${#legacy_args} -1 ))'"
-            if [[ $positional_count -le $((${#legacy_args} - 1)) ]]; then
-                # set counter to for next option_flag to fill
-                positional_count=$((positional_count+1))
-                flohmarkt_print_debug "incremented positional_counter to '$positional_count'"
-
-                # Use the long option, corresponding to the option_flag, as a variable
-                # (e.g. for [u]=user, 'user' will be used as a variable)
-                # Also, remove '=' at the end of the long option
-                # The variable name will be stored in 'option_var'
-                option_var="${args_array[$option_flag]%=}"
-            elif [[ $positional_count -ge $((${#legacy_args} - 1)) ]] && 
-                ! declare -p ${option_var} | grep '^declare -a'
-            then
-                # no more legacy_args to fill - legacy behaviour: complain and return
-                ynh_print_warn --message="Too many arguments ! \"${arguments[$i]}\" will be ignored."
-                return
-            else
-                flohmarkt_print_debug "array found - keep going"
-            fi
-
-            # value to be assigned to ${!option_var}
-            option_value=$argument
-
-            # shift off one positional parameter
-            shift_value=1
-        fi
-
-        # fill option_var with value found
-        # if ${!option_var} is an array, fill mutiple values as array cells
-        # otherwise concatenate them seperated by ';'
-        # TODO explain use of nameref
-        local -n option_ref=$option_var
-        flohmarkt_print_debug "option_ref declare: '$(declare -p option_ref)'"
-        flohmarkt_print_debug "'$option_var' declare: '$(declare -p $option_var)'"
-        if declare -p $option_var | grep '^declare -a ' > /dev/null; then
-          # hurray it's an array
-          flohmarkt_print_debug "hurray! '$option_var' is an array."
-          ${option_ref}+='("${option_value}")'
-        elif ! [[ -v "$option_var" ]] || [[ -z "$option_ref" ]]; then
-          flohmarkt_print_debug "'$option_var' is unset or empty"
-          option_ref=${option_value}
-        else
-          flohmarkt_print_debug "appending to string '$option_ref'"
-          option_ref+=";${option_value}"
-        fi
-        flohmarkt_print_debug "now declared $option_var: '$(declare -p $option_var)'"
-
-        # shift value off arguments array
-        flohmarkt_print_debug "shifting '$shift_value' off arguments='${arguments[@]}'"
-        arguments=("${arguments[@]:${shift_value}}")
-    done
-
-    # the former subroutine did this - no idea if it is expected somewhere
-    unset legacy_args
-
-    # re-enable trace
-    set -o xtrace # set -x
-}
-
-# local copy of ynh_local_curl() to test some improvement
-# https://github.com/YunoHost/issues/issues/2396
-# https://codeberg.org/flohmarkt/flohmarkt_ynh/issues/51
-ynh_local_curl() {
-# Curl abstraction to help with POST requests to local pages (such as installation forms)
-#
-# usage: ynh_local_curl "page" "key1=value1" "key2=value2" ...
-# | arg: -l --line_match: check answer against an extended regex
-# | arg: -P --put:        PUT instead of POST, requires --data (see below)
-# | arg: -H --header:     add a header to the request (can be used multiple times)
-# | arg: -n --no_sleep:   don't sleep 2 seconds (background: https://github.com/YunoHost/yunohost/pull/547)
-# | arg: -d --data:       data to be PUT or POSTed. Can be used multiple times.
-# | arg: -L --location:   either the PAGE part in 'https://$domain/$path/PAGE' or an URI 
-# | arg: -u --user:       login username (requires --password)
-# | arg: -p --password:   login password
-# TODO I might need a mode to GET and --line_match...
-# | arg:                  URL like 'http://doma.in/path/file.ext'
-# | arg: page        - positional parameter legacy version of '--page'
-# | arg: key1=value1 - (Optional, POST only) legacy version of '--data' as positional parameter
-# | arg: key2=value2 - (Optional, POST only) Another POST key and corresponding value
-# | arg: ...         - (Optional, POST only) More POST keys and values
-#
-# example: ynh_local_curl "/install.php?installButton" "foo=$var1" "bar=$var2"
-#   → will open a POST request to "https://$domain/$path/install.php?installButton" posting "foo=$var1" and "bar=$var2"
-# example: ynh_local_curl -P --header "Accept: application/json"  -H "Content-Type: application/json" \
-#   --data "{\"members\":{\"names\": [\"${app}\"],\"roles\": [\"editor\"]}}" -l '"ok":true' \
-#   "http://localhost:5984/"
-#   → will open a POST request to "http://localhost:5984/" adding headers with "Accept: application/json"
-#     and "Content-Type: application/json" sending the data from the "--data" argument. ynh_local_curl will
-#     return with an error if the servers response does not match the extended regex '"ok":true'.
-#
-# For multiple calls, cookies are persisted between each call for the same app.
-#
-# `$domain` and `$path_url` need to be defined externally if the first form for the 'page' argument is used.
-# 
-# The return code of this function will vary depending of the use of --line_match:
-# 
-# If --line_match has been used the return code will be the one of the grep checking line_match
-# against the output of curl. The output of curl will not be returned.
-#
-# If --line_match has not been provided the return code will be the one of the curl command and
-# the output of curl will be echoed.
-#
-# Requires YunoHost version 2.6.4 or higher.
-
-    # Declare an array to define the options of this helper.
-    local legacy_args=pd
-    local -A args_array=( [l]=line_match= [P]=put [H]=header= [n]=no_sleep [L]=location= [d]=data= [u]=user= [p]=password= )
-    local line_match
-    local put
-    # @@ todo if the headers contain ';' somewhere it might be a problem to split them
-    # apart correctly later, because all values are stored in $header seperated by 
-    # ';' like 'header1: value;header2: value'.
-    # might be a good improvement to 'ynh_handle_getopts_args' to act differently if
-    # e.g. $header had been defined as an array: https://stackoverflow.com/questions/14525296/how-do-i-check-if-variable-is-an-array
-    local -a header 
-    local no_sleep
-    local location
-    local user
-    local password
-    local -a data
-    local -a curl_opt_args # optional arguments to `curl`
-    # Manage arguments with getopts
-    ynh_handle_getopts_args "$@"
-
-    # Define url of page to curl
-    # $location contains either an URL or just a page
-    local full_page_url
-    if [[ "$location" =~ ^https?:// ]]; then
-        # if $location starts with an http-protocol use value as a complete URL
-        full_page_url="$location"
-    elif [ "${path_url}" == "/" ]; then
-        # if $path_url points to the webserver root just append $location to localhost URL
-        full_page_url="https://localhost$(ynh_normalize_url_path $location)"
-    else
-        # else append $path_url and $location to localhost URL
-        full_page_url="https://localhost${path_url}$(ynh_normalize_url_path $location)"
-    fi
-    flohmarkt_print_debug "full_page_url='$full_page_url'"
-
-    # Concatenate data
-    # POST: all elements of array $data in one string seperated by '&'
-    # PUT:  all elements of $data in one string seperated by space
-    local seperator='&'
-    if [[ $put -eq 1 ]]; then
-      seperator=' '
-    fi
-    join_by() { local IFS="$1"; shift; echo "$*"; }
-    local P_DATA=$( join_by "$seperator" ${data[@]} )
-    if [[ "$P_DATA" != '' ]]; then curl_opt_args+=('--data'); curl_opt_args+=("$P_DATA"); fi
-
-    # prepend every element in header array with " -H "
-    local seq
-    while [[ $seq -lt ${#header[@]} ]]; do
-      curl_opt_args+=('-H')
-      curl_opt_args+=("${header[$seq]}")
-      seq=$(( $seq + 1 ))
-    done
-
-    # build --user for curl 
-    if [[ -n "$user" ]] && [[ -n "$password" ]]; then
-      curl_opt_args+=("--user $user:$password")
-    elif [[ -n "$user" ]] && [[ -z "$password" ]]; then
-      ynh_die --message="user provided via '-u/--user' needs password specified via '-p/--password'"
-    fi
-
-    flohmarkt_print_debug "long string curl_opt_args='${curl_opt_args[@]}'"
-    seq=0
-    while [[ $seq -lt ${#curl_opt_args[@]} ]]; do
-      flohmarkt_print_debug "  opt[$seq]='${curl_opt_args[$seq]}'"
-      seq=$(( $seq + 1 ))
-    done
-
-    # https://github.com/YunoHost/yunohost/pull/547
-    # Wait untils nginx has fully reloaded (avoid curl fail with http2) unless disabled
-    if ! [[ $no_sleep == 1 ]]; then
-      sleep 2
-    fi
-
-    local cookiefile=/tmp/ynh-$app-cookie.txt
-    touch $cookiefile
-    chown root $cookiefile
-    chmod 700 $cookiefile
-
-    # Temporarily enable visitors if needed...
-    # TODO maybe there's a way to do this using --user and --password instead?
-    #   would improve security
-    local visitors_enabled=$(ynh_permission_has_user "main" "visitors" && echo yes || echo no)
-    if [[ $visitors_enabled == "no" ]]; then
-        ynh_permission_update --permission "main" --add "visitors"
-    fi
-
-    flohmarkt_print_debug executing \'\
-    curl --silent --show-error --insecure --location --resolve "$domain:443:127.0.0.1" \
-      --header "Host: $domain" --cookie-jar $cookiefile --cookie $cookiefile \
-      "${curl_opt_args[@]}" "$full_page_url"\'
-    # Curl the URL
-    local curl_result=$( curl --silent --show-error --insecure --location \
-      --header "Host: $domain" --cookie-jar $cookiefile --cookie $cookiefile \
-      --resolve "$domain:443:127.0.0.1" "${curl_opt_args[@]}" "$full_page_url" )
-    local curl_error=$?
-    flohmarkt_print_debug "curl_result='$curl_result' ($curl_error)"
-    
-    # check result agains --line_match if provided
-    if [[ -n $line_match ]]; then
-      printf '%s' "$curl_result" | grep "$line_match" > /dev/null
-      # will return the error code of the above grep
-    else
-      # no --line_match, return curls error code and output
-      echo $curl_result
-      return $curl_error
-    fi
-
-    # re-enable security
-    if [[ $visitors_enabled == "no" ]]; then
-        ynh_permission_update --permission "main" --remove "visitors"
-    fi
-}
+# source own development version of ynh_handle_getopts_args and ynh_local_curl
+source ynh_handle_getopts_args
+source ynh_local_curl
+# TODO delete above when local versions not needed anymore
 
 # create symlinks containing domain and path for install, data and log directories
 flohmarkt_ynh_create_symlinks() {
@@ -594,51 +134,43 @@ flohmarkt_ynh_import_couchdb() {
 }
 
 flohmarkt_ynh_delete_couchdb_user() {
-  # https://codeberg.org/flohmarkt/flohmarkt_ynh/issues/46 - more than one revision?
-  local couchdb_user_revision=$( curl -sX GET "http://127.0.0.1:5984/_users/org.couchdb.user%3A${app}" \
-    --user "admin:${password_couchdb_admin}" | jq -r ._rev )
-  curl -s -X DELETE "http://127.0.0.1:5984/_users/org.couchdb.user%3A${app}?rev=${couchdb_user_revision}" \
-    --user "admin:${password_couchdb_admin}"
-}
-
-flohmarkt_ynh_delete_couchdb_db() {
-  curl -s -X DELETE "http://127.0.0.1:5984/${app}" --user "admin:${password_couchdb_admin}"
+  local couchdb_user_revision=$( ynh_local_curl -n -m GET -u admin -p "$password_couchdb_admin" \
+    "http://localhost:5984/_users/org.couchdb.user%3A${app}" | jq -r ._rev )
+  ynh_local_curl -n -m DELETE -u admin -p ${password_couchdb_admin} -l '"ok":true' \
+    "http://localhost:5984/_users/org.couchdb.user%3A${app}?rev=${couchdb_user_revision}"
 }
 
 flohmarkt_ynh_create_couchdb_user() {
-  curl -s -X PUT "http://127.0.0.1:5984/_users/org.couchdb.user:${app}" --user "admin:${password_couchdb_admin}"\
+  ynh_local_curl -n -m PUT -u admin -p "${password_couchdb_admin}" \
     -H "Accept: application/json" -H "Content-Type: application/json" \
-    -d "{\"name\": \"${app}\", \"password\": \"${password_couchdb_flohmarkt}\", \"roles\": [], \"type\": \"user\"}"
-  # @@ check answer something like
-  # {"ok":true,"id":"org.couchdb.user:flohmarkt","rev":"35-9865694604ab384388eea0f978a6e728"}
+    -d '{' \
+    -d "\"name\": \"${app}\", \"password\": \"${password_couchdb_flohmarkt}\"," \
+    -d '"roles": [], "type": "user"}' \
+    --line_match='"ok":true' \
+    "http://127.0.0.1:5984/_users/org.couchdb.user:${app}"
 }
 
 flohmarkt_ynh_couchdb_user_permissions() {
-  curl -s -X PUT "http://127.0.0.1:5984/${app}/_security" --user "admin:${password_couchdb_admin}"\
+  ynh_local_curl -n -m PUT -u admin -p "$password_couchdb_admin" \
     -H "Accept: application/json" -H "Content-Type: application/json" \
-    -d "{\"members\":{\"names\": [\"${app}\"],\"roles\": [\"editor\"]}}"
-
+    -d "{\"members\":{\"names\": [\"${app}\"],\"roles\": [\"editor\"]}}" \
+    --line_match='ok' \
+    "http://127.0.0.1:5984/${app}/_security"
 }
 
 flohmarkt_ynh_exists_couchdb_user() {
-  if [[ $( curl -sX GET "http://127.0.0.1:5984/_users/org.couchdb.user%3A${app}" \
-    --user "admin:${password_couchdb_admin}" | jq .error ) == '"not_found"' ]]
-  then
-    false
-  else
-    true
-  fi
+  ynh_local_curl -n -m GET  -u admin -p "$password_couchdb_admin" -l "\"_id\":\"org.couchdb.user:$app\"" \
+    "http://127.0.0.1:5984/_users/org.couchdb.user%3A${app}"
 }
 
 flohmarkt_ynh_exists_couchdb_db() {
-  if [[ $( curl -sX GET "http://127.0.0.1:5984/${app}" --user "admin:${password_couchdb_admin}" \
-    | jq .error ) == '"not_found"' ]]
-  then
-    false
-  else
-    true
-  fi
-  
+  ynh_local_curl -n -m GET -u admin -p "$password_couchdb_admin" -l "\"db_name\":\"testing\"" \
+    "http://127.0.0.1:5984/${app}"
+}
+
+flohmarkt_ynh_delete_couchdb_db() {
+  ynh_local_curl -n -m DELETE -u admin -p "$password_couchdb_admin" \
+    --line_match='"ok":true' "http://127.0.0.1:5984/${app}"
 }
 
 # check whether old couchdb user or database exist before creating the new ones

scripts/ynh_handle_getopts_args

@@ -0,0 +1,312 @@
+# Redisgn of ynh_handle_getopts_args for flohmarkt to be tested as `flohmarkt_ynh_handle_getopts_args`
+# Internal helper design to allow helpers to use getopts to manage their arguments
+#
+# [internal]
+#
+# example: function my_helper()
+# {
+#     local -A args_array=( [a]=arg1= [b]=arg2= [c]=arg3 )
+#     local arg1
+#     local arg2
+#     local arg3
+#     ynh_handle_getopts_args "$@"
+#
+#     [...]
+# }
+# my_helper --arg1 "val1" -b val2 -c
+#
+# usage: ynh_handle_getopts_args "$@"
+# | arg: $@    - Simply "$@" to tranfert all the positionnal arguments to the function
+#
+# This helper need an array, named "args_array" with all the arguments used by the helper
+#   that want to use ynh_handle_getopts_args
+# Be carreful, this array has to be an associative array, as the following example:
+# local -A args_array=( [a]=arg1 [b]=arg2= [c]=arg3 )
+# Let's explain this array:
+# a, b and c are short options, -a, -b and -c
+# arg1, arg2 and arg3 are the long options associated to the previous short ones. --arg1, --arg2 and --arg3
+# For each option, a short and long version has to be defined.
+# Let's see something more significant
+# local -A args_array=( [u]=user [f]=finalpath= [d]=database )
+#
+# NB: Because we're using 'declare' without -g, the array will be declared as a local variable.
+#
+# Please keep in mind that the long option will be used as a variable to store the values for this option.
+# For the previous example, that means that $finalpath will be fill with the value given as argument for this option.
+#
+# Also, in the previous example, finalpath has a '=' at the end. That means this option need a value.
+# So, the helper has to be call with --finalpath /final/path, --finalpath=/final/path or -f /final/path, 
+# the variable $finalpath will get the value /final/path
+# If there's many values for an option, -f /final /path, the value will be separated by a ';' $finalpath=/final;/path
+# For an option without value, like --user in the example, the helper can be called only with --user or -u. $user 
+# will then get the value 1.
+#
+# To keep a retrocompatibility, a package can still call a helper, using getopts, with positional arguments.
+# The "legacy mode" will manage the positional arguments and fill the variable in the same order than they are given 
+# in $args_array. e.g. for `my_helper "val1" val2`, arg1 will be filled with val1, and arg2 with val2.
+
+# Positional parameters (used to be the only way to use ynh_handle_getopts_args once upon a time) can be 
+# used also:
+# 
+# '--'          start processing the rest of the arguments as positional parameters
+# $legacy_args  The arguments positional parameters will be assign to
+#               Needs to be composed of array keys of args_array. If a key for a predefined variable
+#               is used multiple times the assigned values will be concatenated delimited by ';'.
+#               If the long option variable to contain the data is predefined as an array (e.g. using
+#               `local -a arg1` then multiple values will be assigned to its cells.
+#               If the last positional parameter defined in legacy_args is defined as an array all 
+#               the leftover positional parameters will be assigned to its cells.
+#               (it is named legacy_args, because the use of positional parameters was about to be
+#               deprecated before the last re-design of this sub)
+#
+# Requires YunoHost version 3.2.2 or higher.
+# flohmarkt_ynh_handle_getopts_args() {
+ynh_handle_getopts_args() {
+    # Manage arguments only if there's some provided
+    set +o xtrace # set +x
+    if [ $# -eq 0 ]; then
+      ynh_print_warn --message="ynh_handle_getopts_args called without arguments"
+      return
+    fi
+
+    # Store arguments in an array to keep each argument separated
+    local arguments=("$@")
+
+    # For each option in the array, reduce to short options for getopts (e.g. for [u]=user, --user will be -u)
+    # And built parameters string for getopts
+    # ${!args_array[@]} is the list of all option_flags in the array (An option_flag is 'u' in [u]=user, user is a value)
+    local getopts_parameters=""
+    local option_flag=""
+    ## go through all possible options and replace arguments with short versions
+    flohmarkt_print_debug "arguments = '${arguments[@]}"
+    flohmarkt_print_debug "args_array = (${!args_array[@]})"
+    for option_flag in "${!args_array[@]}"; do
+        # TODO refactor: Now I'm not sure anymore this part belongs here. To make the
+        # this all less hard to read and understand I'm thinking at the moment that it 
+        # would be good to split the different things done here into their own loops:
+        #
+        # 1. build the option string $getopts_parameters
+        # 2. go through the arguments and add empty arguments where needed to 
+        #    allow for cases like '--arg= --value' where 'value' is a valid option, too
+        # 3. replace long option names by short once
+        # 4. (possibly add empty parameters for '-a -v' in cases where -a expects a value
+        #    and -v is a valid option, too - but I dearly hope this will not be necessary)
+        flohmarkt_print_debug "option_flag = $option_flag"
+        # Concatenate each option_flags of the array to build the string of arguments for getopts
+        # Will looks like 'abcd' for -a -b -c -d
+        # If the value of an option_flag finish by =, it's an option with additionnal values. 
+        # (e.g. --user bob or -u bob)
+        # Check the last character of the value associate to the option_flag
+        flohmarkt_print_debug "compare to '${args_array[$option_flag]: -1}'"
+        if [ "${args_array[$option_flag]: -1}" = "=" ]; then
+            # For an option with additionnal values, add a ':' after the letter for getopts.
+            getopts_parameters="${getopts_parameters}${option_flag}:"
+        else
+            getopts_parameters="${getopts_parameters}${option_flag}"
+        fi
+        flohmarkt_print_debug "getopts_parameters = ${getopts_parameters}"
+        # Check each argument given to the function
+        local arg=""
+        # ${#arguments[@]} is the size of the array
+        ## for one possible option: look at each argument supplied:
+        for arg in $(seq 0 $((${#arguments[@]} - 1))); do
+            flohmarkt_print_debug "option_flag='$option_flag', arg = '$arg', argument = '${arguments[arg]}'"
+            # the following cases need to be taken care of
+            # '--arg=value'    → works
+            # '--arg= value'   → works
+            # '--arg=-value'   → works
+            # '--arg= -v'      or
+            # '--arg= --value' → works if not exists arg '[v]=value='
+            #                  → $arg will be set to '-v' or '--value'
+            #   but if exists '[v]=value=' this is not the expected behavior:
+            #   → then $arg is expected to contain an empty value and '-v' or '--value'
+            #     is expected to be interpreted as its own valid argument
+            #   (found in use of ynh_replace_string called by ynh_add_config)
+            #   solution:
+            #   insert an empty arg into array arguments to be later interpreted by 
+            #   getopts as the missing value to --arg=
+            if [[ -v arguments[arg+1] ]] && [[ ${arguments[arg]: -1} == '=' ]]; then
+                # arg ends with a '='
+                local this_argument=${arguments[arg]}
+                local next_argument=${arguments[arg+1]}
+                # for looking up next_argument in args_array remove optionally trailing '='
+                next_argument=$( printf '%s' "$next_argument" | cut -d'=' -f1 )
+                flohmarkt_print_debug "MISSING PARAMETER: this_argument='$this_argument', next_argument='$next_argument'"
+
+                # check if next_argument is a value in args_array
+                # → starts with '--' and the rest of the argument excluding optional trailing '=' 
+                #     of the string is a value in associative array args_array
+                # → or starts with '-' and the rest of the argument is a valid key in args_array
+                #   (long argument could already have been replaced by short version before)
+                flohmarkt_print_debug "args_array values='${args_array[@]}'"
+                flohmarkt_print_debug "args_array   keys='${!args_array[@]}'"
+                flohmarkt_print_debug "{next_argument:2}='${next_argument:2}'"
+                flohmarkt_print_debug "{next_argument:0:2}='${next_argument:0:2}'"
+                if ( [[ "${next_argument:0:2}" == '--' ]] \
+                    && printf '%s ' "${args_array[@]}" | fgrep -w "${next_argument:2}" > /dev/null ) \
+                || ( [[ "${next_argument:0:1}" == '-' ]] \
+                    && printf '%s ' "${!args_array[@]}" | fgrep -w "${next_argument:1:1}" > /dev/null )
+                then
+                    # insert an empty value to array arguments to be interpreted as the value
+                    # for argument[arg]
+                    arguments=( ${arguments[@]:0:arg+1} '' ${arguments[@]:arg+1})
+                    flohmarkt_print_debug "now arguments='${arguments[@]}'"
+                fi
+            fi
+
+            # Replace long option with = (match the beginning of the argument)
+            arguments[arg]="$(printf '%s\n' "${arguments[arg]}" \
+                | sed "s/^--${args_array[$option_flag]}/-${option_flag}/")"
+            # And long option without = (match the whole line)
+            arguments[arg]="$(printf '%s\n' "${arguments[arg]}" \
+                | sed "s/^--${args_array[$option_flag]%=}$/-${option_flag}/")"
+            flohmarkt_print_debug "                            arg = '$arg', argument = '${arguments[arg]}'"
+        done
+        flohmarkt_print_debug "====> end loop: arguments = '${arguments[@]}'"
+    done
+    flohmarkt_print_debug '================= end first loop ================='
+    
+    # Parse the first argument, return the number of arguments to be shifted off the arguments array
+    # The function call is necessary here to allow `getopts` to use $@
+    parse_arg() {
+        flohmarkt_print_debug "========= parse_arg started ======== , arguments='$@', getopts_parameters: '$getopts_parameters'"
+        # Initialize the index of getopts
+        OPTIND=1
+        # getopts will fill $parameter with the letter of the option it has read.
+        local parameter=""
+        getopts ":$getopts_parameters" parameter || true
+        flohmarkt_print_debug "after getopts - parameter='$parameter', OPTIND='${OPTIND:-none}', OPTARG='${OPTARG:-none}'"
+
+        if [ "$parameter" = "?" ]; then
+            ynh_die --message="Invalid argument: -${OPTARG:-}"
+            flohmarkt_print_debug "Invalid argument: -${OPTARG:-}"
+            exit 255
+        elif [ "$parameter" = ":" ]; then
+            ynh_die --message="-$OPTARG parameter requires an argument."
+            echo "-$OPTARG parameter requires an argument."
+            exit 255
+        else
+            # Use the long option, corresponding to the short option read by getopts, as a variable
+            # (e.g. for [u]=user, 'user' will be used as a variable)
+            # Also, remove '=' at the end of the long option
+            # The variable name will be stored in 'option_var' as a nameref
+            option_var="${args_array[$parameter]%=}"
+            flohmarkt_print_debug "option_var='$option_var'"
+            # if there's a '=' at the end of the long option name, this option takes values
+            if [ "${args_array[$parameter]: -1}" != "=" ]; then
+                # no argument expected for option - set option variable to '1'
+                option_value=1
+            else
+                # remove leading and trailing spaces from OPTARG
+                OPTARG="$( printf '%s' "${OPTARG}" | sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//')"
+                option_value="${OPTARG}"
+            fi
+            flohmarkt_print_debug "option_value='$option_value'"
+            # set shift_value according to the number of options interpreted by getopts
+            shift_value=$(( $OPTIND - 1 ))
+            flohmarkt_print_debug "shift_value='$shift_value'"
+        fi
+    }
+
+    # iterate over the arguments: if first argument starts with a '-' feed arguments to getopts
+    # if first argument doesn't start with a '-' enter mode to read positional parameters
+    local argument
+    local positional_mode=0 # state is getopts mode at the beginning, not positional parameters
+    local positional_count=0 # counter for positional parameters
+    local option_var=''   # the variable name to be filled
+    # Try to use legacy_args as a list of option_flag of the array args_array
+    # Otherwise, fill it with getopts_parameters to get the option_flag. 
+    # (But an associative arrays isn't always sorted in the correct order...)
+    # Remove all ':' in getopts_parameters, if used.
+    legacy_args=${legacy_args:-${getopts_parameters//:/}}
+    while [[ -v 'arguments' ]] && [[ ${#arguments} -ne 0 ]]; do
+        flohmarkt_print_debug '======= start while loop ======='
+        local shift_value=0
+        local option_value='' # the value to be filled into ${!option_var}
+        argument=${arguments[0]}
+        flohmarkt_print_debug "argument='$argument'"
+        # if state once changed to positional parameter mode, all the rest of the arguments will
+        # be interpreted in positional parameter mode even if they start with a '-'
+        if [ $positional_mode == 0 ] && [ "${argument}" == '--' ];then
+            flohmarkt_print_debug "found '--', start positional parameter mode"
+            positional_mode=1
+            shift_value=1
+        elif [ $positional_mode == 0 ] && [ "${argument:0:1}" == '-' ]; then
+            flohmarkt_print_debug "getopts, arguments='${arguments[@]}', starting parse_arg"
+            parse_arg "${arguments[@]}"
+        else
+            positional_mode=1 # set state to positional parameter mode
+            flohmarkt_print_debug "positional parameter, argument='$argument'"
+
+            # Get the option_flag from getopts_parameters by using the option_flag according to the 
+            # position of the argument.
+            option_flag=${legacy_args:$positional_count:1}
+
+            # increment counter for legacy_args if still args left. If no args left check if the 
+            # last arg is a predefined array and let it cells be filled. Otherwise complain and 
+            # return.
+            flohmarkt_print_debug "positional_counter='$positional_count', max positional_counter='$(( ${#legacy_args} -1 ))'"
+            if [[ $positional_count -le $((${#legacy_args} - 1)) ]]; then
+                # set counter to for next option_flag to fill
+                positional_count=$((positional_count+1))
+                flohmarkt_print_debug "incremented positional_counter to '$positional_count'"
+
+                # Use the long option, corresponding to the option_flag, as a variable
+                # (e.g. for [u]=user, 'user' will be used as a variable)
+                # Also, remove '=' at the end of the long option
+                # The variable name will be stored in 'option_var'
+                option_var="${args_array[$option_flag]%=}"
+            elif [[ $positional_count -ge $((${#legacy_args} - 1)) ]] && 
+                ! declare -p ${option_var} | grep '^declare -a'
+            then
+                # no more legacy_args to fill - legacy behaviour: complain and return
+                ynh_print_warn --message="Too many arguments ! \"${arguments[$i]}\" will be ignored."
+                return
+            else
+                flohmarkt_print_debug "array found - keep going"
+            fi
+
+            # value to be assigned to ${!option_var}
+            option_value=$argument
+
+            # shift off one positional parameter
+            shift_value=1
+        fi
+
+        # fill option_var with value found
+        # if ${!option_var} is an array, fill mutiple values as array cells
+        # otherwise concatenate them seperated by ';'
+        # nameref is used to access the variable that is named $option_var
+        local -n option_ref=$option_var
+        # this defines option_ref as a reference to the variable named "$option_var"
+        # any operation on option_ref will be written to the variable named "$option_var"
+        # 'option_ref="hello world"' will work like as if '${!option_var}="hello world"'
+        # would be a valid syntax
+        # see also: `man bash` part about commands 'declare' option '-n'
+        flohmarkt_print_debug "option_ref declare: '$(declare -p option_ref)'"
+        flohmarkt_print_debug "'$option_var' declare: '$(declare -p $option_var)'"
+        flohmarkt_print_debug "option_value='$option_value'"
+        if declare -p $option_var | grep '^declare -a ' > /dev/null; then
+          # hurray it's an array
+          flohmarkt_print_debug "hurray! '$option_var' is an array."
+          option_ref+=( "${option_value}" )
+        elif ! [[ -v "$option_var" ]] || [[ -z "$option_ref" ]]; then
+          flohmarkt_print_debug "'$option_var' is unset or empty"
+          option_ref=${option_value}
+        else
+          flohmarkt_print_debug "appending to string '$option_ref'"
+          option_ref+=";${option_value}"
+        fi
+        flohmarkt_print_debug "now declared $option_var: '$(declare -p $option_var)'"
+
+        # shift value off arguments array
+        flohmarkt_print_debug "shifting '$shift_value' off arguments='${arguments[@]}'"
+        arguments=("${arguments[@]:${shift_value}}")
+    done
+
+    # the former subroutine did this - no idea if it is expected somewhere
+    unset legacy_args
+
+    # re-enable trace
+    set -o xtrace # set -x
+}

scripts/ynh_local_curl

@@ -0,0 +1,163 @@
+# local copy of ynh_local_curl() to test some improvement
+# https://github.com/YunoHost/issues/issues/2396
+# https://codeberg.org/flohmarkt/flohmarkt_ynh/issues/51
+ynh_local_curl() {
+# Curl abstraction to help with POST requests to local pages (such as installation forms)
+#
+# usage: ynh_local_curl [--option [-other_option […]]] "page" "key1=value1" "key2=value2" ...
+# | arg: -l --line_match: check answer against an extended regex
+# | arg: -m --method:     request method to use: POST (default), PUT, GET, DELETE
+# | arg: -H --header:     add a header to the request (can be used multiple times)
+# | arg: -d --data:       data to be PUT or POSTed. Can be used multiple times.
+# | arg: -u --user:       login username (requires --password)
+# | arg: -p --password:   login password
+# | arg: -n --no_sleep:   don't sleep 2 seconds (background: https://github.com/YunoHost/yunohost/pull/547)
+# | arg: page        - either the PAGE part in 'https://$domain/$path/PAGE' or an URI
+# | arg: key1=value1 - (Optional, POST only) legacy version of '--data' as positional parameter
+# | arg: key2=value2 - (Optional, POST only) Another POST key and corresponding value
+# | arg: ...         - (Optional, POST only) More POST keys and values
+#
+# example: ynh_local_curl "/install.php?installButton" "foo=$var1" "bar=$var2"
+#   → will open a POST request to "https://$domain/$path/install.php?installButton" posting "foo=$var1" and "bar=$var2"
+# example: ynh_local_curl -m POST --header "Accept: application/json" \ 
+#   -H "Content-Type: application/json" \
+#   --data "{\"members\":{\"names\": [\"${app}\"],\"roles\": [\"editor\"]}}" -l '"ok":true' \
+#   "http://localhost:5984/"
+#   → will open a POST request to "http://localhost:5984/" adding headers with "Accept: application/json"
+#     and "Content-Type: application/json" sending the data from the "--data" argument. ynh_local_curl will
+#     return with an error if the servers response does not match the extended regex '"ok":true'.
+#
+# For multiple calls, cookies are persisted between each call for the same app.
+#
+# `$domain` and `$path_url` need to be defined externally if the first form for the 'page' argument is used.
+# 
+# The return code of this function will vary depending of the use of --line_match:
+# 
+# If --line_match has been used the return code will be the one of the grep checking line_match
+# against the output of curl. The output of curl will not be returned.
+#
+# If --line_match has not been provided the return code will be the one of the curl command and
+# the output of curl will be echoed.
+#
+# Requires YunoHost version 2.6.4 or higher.
+
+    # Declare an array to define the options of this helper.a
+    local -A supported_methods=( [PUT]=1 [POST]=1 [GET]=1 [DELETE]=1 )
+    local legacy_args=Ld
+    local -A args_array=( [l]=line_match= [m]=method= [H]=header= [n]=no_sleep [L]=location= [d]=data= [u]=user= [p]=password= )
+    local line_match
+    local method
+    local -a header 
+    local no_sleep
+    local location
+    local user
+    local password
+    local -a data
+    local -a curl_opt_args # optional arguments to `curl`
+    # Manage arguments with getopts
+    ynh_handle_getopts_args "$@"
+
+    # make sure method is a supported one
+    if ! [[ -v supported_methods[$method] ]]; then
+      ynh_die --message="method $method not supported by ynh_local_curl"
+    fi
+
+    # Define url of page to curl
+    # $location contains either an URL or just a page
+    local full_page_url
+    if [[ "$location" =~ ^https?:// ]]; then
+        # if $location starts with an http-protocol use value as a complete URL
+        full_page_url="$location"
+    elif [ "${path_url}" == "/" ]; then
+        # if $path_url points to the webserver root just append $location to localhost URL
+        full_page_url="https://localhost$(ynh_normalize_url_path $location)"
+    else
+        # else append $path_url and $location to localhost URL
+        full_page_url="https://localhost${path_url}$(ynh_normalize_url_path $location)"
+    fi
+    flohmarkt_print_debug "full_page_url='$full_page_url'"
+
+    # Concatenate data
+    # POST: all elements of array $data in one string seperated by '&'
+    # PUT:  all elements of $data concatenated in one string
+    # GET:  no data
+    # DELETE: no data
+    local seperator='&'
+    if [[ "$method" == 'PUT' ]]; then
+      seperator=''
+    fi
+    join_by() { local IFS="$1"; shift; echo "$*"; }
+    local P_DATA=$( join_by "$seperator" ${data[@]} )
+    if [[ "$P_DATA" != '' ]]; then curl_opt_args+=('--data'); curl_opt_args+=("$P_DATA"); fi
+
+    # prepend every element in header array with " -H "
+    local seq=0
+    while [[ -v header ]] && [[ $seq -lt ${#header[@]} ]]; do
+      curl_opt_args+=('-H')
+      curl_opt_args+=("${header[$seq]}")
+      seq=$(( $seq + 1 ))
+    done
+
+    # build --user for curl 
+    if [[ -n "$user" ]] && [[ -n "$password" ]]; then
+      curl_opt_args+=('--user' "$user:$password")
+    elif [[ -n "$user" ]] && [[ -z "$password" ]]; then
+      ynh_die --message="user provided via '-u/--user' needs password specified via '-p/--password'"
+    fi
+
+    flohmarkt_print_debug "long string curl_opt_args='${curl_opt_args[@]}'"
+    seq=0
+    while [[ $seq -lt ${#curl_opt_args[@]} ]]; do
+      flohmarkt_print_debug "  opt[$seq]='${curl_opt_args[$seq]}'"
+      seq=$(( $seq + 1 ))
+    done
+
+    # https://github.com/YunoHost/yunohost/pull/547
+    # Wait untils nginx has fully reloaded (avoid curl fail with http2) unless disabled
+    if ! [[ -v no_sleep ]]; then
+      sleep 2
+    fi
+
+    local app=${app:-testing}
+    local cookiefile=/tmp/ynh-$app-cookie.txt
+    touch $cookiefile
+    chown root $cookiefile
+    chmod 700 $cookiefile
+
+    # Temporarily enable visitors if needed...
+    # TODO maybe there's a way to do this using --user and --password instead?
+    #   would improve security
+    if ! [[ "$app" == "testing" ]]; then
+        local visitors_enabled=$(ynh_permission_has_user "main" "visitors" && echo yes || echo no)
+        if [[ $visitors_enabled == "no" ]]; then
+            ynh_permission_update --permission "main" --add "visitors"
+        fi
+    fi
+
+    flohmarkt_print_debug executing \'\
+    curl --silent --show-error --insecure --location --resolve "$domain:443:127.0.0.1" \
+      --header "Host: $domain" --cookie-jar $cookiefile --cookie $cookiefile \
+      "${curl_opt_args[@]}" "$full_page_url"\'
+    # Curl the URL
+    local curl_result=$( curl --request "$method" --silent --show-error --insecure --location \
+      --header "Host: $domain" --cookie-jar $cookiefile --cookie $cookiefile \
+      --resolve "$domain:443:127.0.0.1" "${curl_opt_args[@]}" "$full_page_url" )
+    local curl_error=$?
+    flohmarkt_print_debug "curl_result='$curl_result' ($curl_error)"
+    
+    # check result agains --line_match if provided
+    if [[ -v line_match ]] && [[ -n $line_match ]]; then
+      printf '%s' "$curl_result" | grep "$line_match" > /dev/null
+      # will return the error code of the above grep
+      curl_error=$?
+    else
+      # no --line_match, return curls error code and output
+      echo $curl_result
+    fi
+
+    # re-enable security
+    if [[ -v visitor_enabled ]] && [[ $visitors_enabled == "no" ]]; then
+       ynh_permission_update --permission "main" --remove "visitors"
+    fi
+    return $curl_error
+}