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
use nu_protocol::ast::Call;
use nu_protocol::engine::{Command, EngineState, Stack};
use nu_protocol::{
Category, Example, IntoPipelineData, PipelineData, ShellError, Signature, Span, Type, Value,
};
#[derive(Clone)]
pub struct SubCommand;
impl Command for SubCommand {
fn name(&self) -> &str {
"url build-query"
}
fn signature(&self) -> Signature {
Signature::build("url build-query")
.input_output_types(vec![
(Type::Record(vec![]), Type::String),
(Type::Table(vec![]), Type::String),
])
.category(Category::Network)
}
fn usage(&self) -> &str {
"Converts record or table into query string applying percent-encoding."
}
fn search_terms(&self) -> Vec<&str> {
vec!["convert", "record", "table"]
}
fn examples(&self) -> Vec<Example> {
vec![
Example {
description: "Outputs a query string representing the contents of this record",
example: r#"{ mode:normal userid:31415 } | url build-query"#,
result: Some(Value::test_string("mode=normal&userid=31415")),
},
Example {
description: "Outputs a query string representing the contents of this 1-row table",
example: r#"[[foo bar]; ["1" "2"]] | url build-query"#,
result: Some(Value::test_string("foo=1&bar=2")),
},
Example {
description: "Outputs a query string representing the contents of this record",
example: r#"{a:"AT&T", b: "AT T"} | url build-query"#,
result: Some(Value::test_string("a=AT%26T&b=AT+T")),
},
]
}
fn run(
&self,
_engine_state: &EngineState,
_stack: &mut Stack,
call: &Call,
input: PipelineData,
) -> Result<PipelineData, ShellError> {
let head = call.head;
to_url(input, head)
}
}
fn to_url(input: PipelineData, head: Span) -> Result<PipelineData, ShellError> {
let output: Result<String, ShellError> = input
.into_iter()
.map(move |value| match value {
Value::Record {
ref cols,
ref vals,
span,
} => {
let mut row_vec = vec![];
for (k, v) in cols.iter().zip(vals.iter()) {
match v.as_string() {
Ok(s) => {
row_vec.push((k.clone(), s.to_string()));
}
_ => {
return Err(ShellError::UnsupportedInput(
"Expected a record with string values".to_string(),
"value originates from here".into(),
head,
span,
));
}
}
}
match serde_urlencoded::to_string(row_vec) {
Ok(s) => Ok(s),
_ => Err(ShellError::CantConvert {
to_type: "URL".into(),
from_type: value.get_type().to_string(),
span: head,
help: None,
}),
}
}
Value::Error { error } => Err(*error),
other => Err(ShellError::UnsupportedInput(
"Expected a table from pipeline".to_string(),
"value originates from here".into(),
head,
other.expect_span(),
)),
})
.collect();
Ok(Value::string(output?, head).into_pipeline_data())
}
#[cfg(test)]
mod test {
use super::*;
#[test]
fn test_examples() {
use crate::test_examples;
test_examples(SubCommand {})
}
}