rust_web_server/entry_point/config_file/
mod.rs

1use std::{io};
2use std::io::{BufRead, Cursor};
3use crate::entry_point::command_line_args::{CommandLineArgument};
4use file_ext::FileExt;
5use crate::symbol::SYMBOL;
6
7pub fn read_config_file(
8    cursor: Cursor<&[u8]>,
9    mut prefix: String) -> Result<bool, String> {
10
11    let mut argument_list : Vec<String> = vec![];
12    let lines = cursor.lines().into_iter();
13    for boxed_line in lines {
14        let line = boxed_line.unwrap();
15        let without_comment = strip_comment(line);
16        let without_whitespaces = strip_whitespaces(without_comment.to_string());
17        let is_table = without_whitespaces.starts_with(SYMBOL.opening_square_bracket);
18        if is_table {
19            prefix = without_whitespaces
20                .replace(SYMBOL.opening_square_bracket, SYMBOL.empty_string)
21                .replace(SYMBOL.closing_square_bracket, SYMBOL.empty_string)
22                .to_string();
23        }
24
25        let boxed_split = without_whitespaces.split_once(SYMBOL.equals);
26        if boxed_split.is_none() { // empty line as an example
27            continue;
28        }
29
30        let arg: String;
31        let (unparsed_key, unparsed_value) = boxed_split.unwrap();
32        let value = unparsed_value
33            .replace(SYMBOL.single_quote, SYMBOL.empty_string)
34            .replace(SYMBOL.quotation_mark, SYMBOL.empty_string)
35            .replace(SYMBOL.closing_square_bracket, SYMBOL.empty_string)
36            .replace(SYMBOL.opening_square_bracket, SYMBOL.empty_string);
37        let key = unparsed_key
38            .replace(SYMBOL.underscore, SYMBOL.hyphen);
39
40
41        if prefix.chars().count() == 0 {
42            arg = [
43                SYMBOL.hyphen,
44                SYMBOL.hyphen,
45                &key,
46                SYMBOL.equals,
47                &value
48            ].join("");
49        } else {
50            arg = [
51                SYMBOL.hyphen,
52                SYMBOL.hyphen,
53                &prefix.to_string(),
54                SYMBOL.hyphen,
55                &key,
56                SYMBOL.equals,
57                &value].join("");
58        }
59
60        argument_list.push(arg);
61    }
62    let params = CommandLineArgument::get_command_line_arg_list();
63    CommandLineArgument::_parse(argument_list, params);
64
65    Ok(true)
66}
67
68fn strip_comment(line: String) -> String {
69    let boxed_split = line.split_once(SYMBOL.number_sign);
70    if boxed_split.is_none() {
71        return line;
72    }
73
74    let (without_comment, _) = boxed_split.unwrap();
75
76    without_comment.trim().to_string()
77}
78
79fn strip_whitespaces(line: String) -> String {
80    let without_whitespaces = line.replace(SYMBOL.whitespace, SYMBOL.empty_string);
81
82    without_whitespaces
83}
84
85pub fn override_environment_variables_from_config(filepath: Option<&str>) {
86    println!("\n  Start of Config Section");
87
88    let path: &str;
89    if filepath.is_none() {
90        path = "/rws.config.toml";
91    } else {
92        path = filepath.unwrap();
93    }
94
95    let boxed_static_filepath = FileExt::get_static_filepath(path);
96    if boxed_static_filepath.is_err() {
97        eprintln!("{}", boxed_static_filepath.err().unwrap());
98        return;
99    }
100
101    let static_filepath = boxed_static_filepath.unwrap();
102    let boxed_content = std::fs::read_to_string(static_filepath);
103
104    if boxed_content.is_err() {
105        eprintln!("    Unable to parse rws.config.toml: {}", boxed_content.err().unwrap());
106        println!("  End of Config Section");
107        return;
108    } else {
109        let content = boxed_content.unwrap();
110        let cursor = io::Cursor::new(content.as_bytes());
111        let _ = read_config_file(cursor, SYMBOL.empty_string.to_string());
112    }
113
114    println!("  End of Config Section");
115}
rust_web_server/entry_point/config_file/mod.rs

rust_web_server/entry_point/config_file/
mod.rs
