1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
// From SQLx - https://github.com/launchbadge/sqlx/blob/master/sqlx-core/src/sqlite/options/parse.rs
// https://www.sqlite.org/uri.html
use std::borrow::Cow;
use std::path::{Path, PathBuf};
use std::str::FromStr;
use crate::options::SqliteConnectOptions;
use percent_encoding::percent_decode_str;
use rsdbc_core::error::RsdbcErrors;
impl FromStr for SqliteConnectOptions {
type Err = RsdbcErrors;
fn from_str(mut uri: &str) -> Result<Self, Self::Err> {
let mut options = Self::new();
// remove scheme from the URI
uri = uri
.trim_start_matches("sqlite://")
.trim_start_matches("sqlite:");
let mut database_and_params = uri.splitn(2, '?');
let database = database_and_params.next().unwrap_or_default();
if database == ":memory:" {
options.in_memory = true;
// setting shared_cache to true. See https://www.sqlite.org/sharedcache.html
options.shared_cache = true;
options.filename = Cow::Owned(PathBuf::from(database));
} else {
// % decode to allow for `?` or `#` in the filename
options.filename = Cow::Owned(
Path::new(
&*percent_decode_str(database)
.decode_utf8()
.map_err(|e| RsdbcErrors::config(e.to_string()))?,
).to_path_buf(),
);
}
if let Some(params) = database_and_params.next() {
for (key, value) in url::form_urlencoded::parse(params.as_bytes()) {
match &*key {
// The mode query parameter determines if the new database is opened read-only,
// read-write, read-write and created if it does not exist, or that the
// database is a pure in-memory database that never interacts with disk,
// respectively.
"mode" => {
match &*value {
"ro" => {
options.read_only = true;
}
// default
"rw" => {}
"rwc" => {
options.create_if_missing = true;
}
"memory" => {
options.in_memory = true;
options.shared_cache = true;
}
_ => {
return Err(RsdbcErrors::Configuration(
format!("unknown value {:?} for `mode`", value).into(),
));
}
}
}
// The cache query parameter specifies the cache behaviour across multiple
// connections to the same database within the process. A shared cache is
// essential for persisting data across connections to an in-memory database.
"cache" => match &*value {
"private" => {
options.shared_cache = false;
}
"shared" => {
options.shared_cache = true;
}
_ => {
return Err(RsdbcErrors::Configuration(
format!("unknown value {:?} for `cache`", value).into(),
));
}
},
_ => {
return Err(RsdbcErrors::Configuration(
format!(
"unknown query parameter `{}` while parsing connection URI",
key
).into(),
));
}
}
}
}
Ok(options)
}
}
#[test]
fn parse_in_memory() -> Result<(), RsdbcErrors> {
let options: SqliteConnectOptions = "sqlite::memory:".parse()?;
assert!(options.in_memory);
assert!(options.shared_cache);
let options: SqliteConnectOptions = "sqlite://?mode=memory".parse()?;
assert!(options.in_memory);
assert!(options.shared_cache);
let options: SqliteConnectOptions = "sqlite://:memory:".parse()?;
assert!(options.in_memory);
assert!(options.shared_cache);
let options: SqliteConnectOptions = "sqlite://?mode=memory&cache=private".parse()?;
assert!(options.in_memory);
assert!(!options.shared_cache);
Ok(())
}
#[test]
fn parse_read_only() -> Result<(), RsdbcErrors> {
let options: SqliteConnectOptions = "sqlite://a.db?mode=ro".parse()?;
assert!(options.read_only);
assert_eq!(&*options.filename.to_string_lossy(), "a.db");
Ok(())
}
#[test]
fn parse_shared_in_memory() -> Result<(), RsdbcErrors> {
let options: SqliteConnectOptions = "sqlite://a.db?cache=shared".parse()?;
assert!(options.shared_cache);
assert_eq!(&*options.filename.to_string_lossy(), "a.db");
Ok(())
}
#[test]
fn from_str() -> Result<(), RsdbcErrors> {
let options = SqliteConnectOptions::from_str("sqlite://a.db")?;
assert_eq!(&*options.filename.to_string_lossy(), "a.db");
assert!(!options.shared_cache);
assert!(!options.in_memory);
assert!(!options.read_only);
assert!(!options.create_if_missing);
Ok(())
}