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Fix parameter passing for single-quoted string literals #577

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merged 4 commits into from
May 10, 2023
Merged

Fix parameter passing for single-quoted string literals #577

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25fab29
Fix parameter passing for single-quoted string literals
nickvollmar May 5, 2023
2fdd527
Fix cargo fmt errors
nickvollmar May 5, 2023
b813288
Fix clippy error
nickvollmar May 5, 2023
21341df
Return TemplateError on json parse failure
nickvollmar May 8, 2023
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28 changes: 25 additions & 3 deletions src/template.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -288,11 +288,33 @@ impl Template {
Parameter::Path(Path::new(param_span.as_str(), path_segs))
}
Rule::literal => {
let s = param_span.as_str();
if let Ok(json) = Json::from_str(s) {
// Parse the parameter as a JSON literal
let param_literal = it.next().unwrap();
let json_result = match param_literal.as_rule() {
Rule::string_literal
if it.peek().unwrap().as_rule() == Rule::string_inner_single_quote =>
{
// ...unless the parameter is a single-quoted string.
// In that case, transform it to a double-quoted string
// and then parse it as a JSON literal.
let string_inner_single_quote = it.next().unwrap();
let double_quoted = format!(
"\"{}\"",
string_inner_single_quote
.as_str()
.replace("\\'", "'")
.replace('"', "\\\"")
);
Json::from_str(&double_quoted)
}
_ => Json::from_str(param_span.as_str()),
};
if let Ok(json) = json_result {
Parameter::Literal(json)
} else {
Parameter::Name(s.to_owned())
return Err(TemplateError::of(TemplateErrorReason::InvalidParam(
param_span.as_str().to_owned(),
)));
}
}
Rule::subexpression => {
Expand Down
25 changes: 25 additions & 0 deletions tests/escape.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -27,19 +27,44 @@ fn test_string_no_escape_422() {
handlebars_helper!(replace: |input: str, from: str, to: str| {
input.replace(from, to)
});
handlebars_helper!(echo: |input: str| {
input
});
hbs.register_helper("replace", Box::new(replace));
hbs.register_helper("echo", Box::new(echo));

assert_eq!(
r#"some\ path"#,
hbs.render_template(r#"{{replace "some/path" "/" "\\ " }}"#, &())
.unwrap()
);
assert_eq!(
r#"some\ path"#,
hbs.render_template(r#"{{replace 'some/path' '/' '\\ ' }}"#, &())
.unwrap()
);

assert_eq!(
r#"some\path"#,
hbs.render_template(r#"{{replace "some/path" "/" "\\" }}"#, &())
.unwrap()
);
assert_eq!(
r#"some\path"#,
hbs.render_template(r#"{{replace 'some/path' '/' '\\' }}"#, &())
.unwrap()
);

assert_eq!(
r#"double-quoted \ 'with' "nesting""#,
hbs.render_template(r#"{{echo "double-quoted \\ 'with' \"nesting\""}}"#, &())
.unwrap()
);
assert_eq!(
r#"single-quoted \ 'with' "nesting""#,
hbs.render_template(r#"{{echo 'single-quoted \\ \'with\' "nesting"'}}"#, &())
.unwrap()
);
}

#[test]
Expand Down
7 changes: 6 additions & 1 deletion tests/helper_macro.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -100,5 +100,10 @@ fn test_macro_helper() {
)
.unwrap(),
"false"
)
);

assert_eq!(
hbs.render_template("{{tag 'html'}}", &()).unwrap(),
"<html>"
);
}