aver/services/
http.rs

1/// Http service — HTTP client built on `ureq`.
2///
3/// Exposes six methods mirroring the HTTP verb set:
4///   GET / HEAD / DELETE  — `Http.get(url)`, `Http.head(url)`, `Http.delete(url)`
5///   POST / PUT / PATCH   — `Http.post(url, body, contentType, headers)`, etc.
6///
7/// Each method requires its own exact effect (`Http.get`, `Http.post`, etc.). Responses are wrapped in `Ok(HttpResponse)`
8/// for any completed HTTP exchange (including 4xx/5xx). Transport failures return
9/// `Err(String)`. Response bodies are capped at 10 MB.
10use std::collections::HashMap;
11use std::sync::Arc as Rc;
12
13use aver_rt::{AverList, Header, HttpResponse};
14
15use crate::nan_value::{Arena, NanValue, NanValueConvert};
16use crate::value::{RuntimeError, Value, list_from_vec, list_view};
17
18pub fn register(global: &mut HashMap<String, Value>) {
19    let mut members = HashMap::new();
20    for method in &["get", "head", "delete", "post", "put", "patch"] {
21        members.insert(
22            method.to_string(),
23            Value::Builtin(format!("Http.{}", method)),
24        );
25    }
26    global.insert(
27        "Http".to_string(),
28        Value::Namespace {
29            name: "Http".to_string(),
30            members,
31        },
32    );
33}
34
35pub const DECLARED_EFFECTS: &[&str] = &[
36    "Http.get",
37    "Http.head",
38    "Http.delete",
39    "Http.post",
40    "Http.put",
41    "Http.patch",
42];
43
44pub fn effects(name: &str) -> &'static [&'static str] {
45    match name {
46        "Http.get" => &["Http.get"],
47        "Http.head" => &["Http.head"],
48        "Http.delete" => &["Http.delete"],
49        "Http.post" => &["Http.post"],
50        "Http.put" => &["Http.put"],
51        "Http.patch" => &["Http.patch"],
52        _ => &[],
53    }
54}
55
56/// Returns `Some(result)` when `name` is owned by this service, `None` otherwise.
57pub fn call(name: &str, args: &[Value]) -> Option<Result<Value, RuntimeError>> {
58    match name {
59        "Http.get" | "Http.head" | "Http.delete" => Some(call_simple(name, args)),
60        "Http.post" | "Http.put" | "Http.patch" => Some(call_with_body(name, args)),
61        _ => None,
62    }
63}
64
65fn call_simple(name: &str, args: &[Value]) -> Result<Value, RuntimeError> {
66    if args.len() != 1 {
67        return Err(RuntimeError::Error(format!(
68            "Http.{}() takes 1 argument (url), got {}",
69            name.trim_start_matches("Http."),
70            args.len()
71        )));
72    }
73    let url = str_arg(&args[0], "Http: url must be a String")?;
74    let result = match name {
75        "Http.get" => aver_rt::http::get(&url),
76        "Http.head" => aver_rt::http::head(&url),
77        "Http.delete" => aver_rt::http::delete(&url),
78        _ => unreachable!(),
79    };
80    response_value(result)
81}
82
83fn call_with_body(name: &str, args: &[Value]) -> Result<Value, RuntimeError> {
84    if args.len() != 4 {
85        return Err(RuntimeError::Error(format!(
86            "Http.{}() takes 4 arguments (url, body, contentType, headers), got {}",
87            name.trim_start_matches("Http."),
88            args.len()
89        )));
90    }
91    let url = str_arg(&args[0], "Http: url must be a String")?;
92    let body = str_arg(&args[1], "Http: body must be a String")?;
93    let content_type = str_arg(&args[2], "Http: contentType must be a String")?;
94    let extra_headers = parse_request_headers(&args[3])?;
95
96    let result = match name {
97        "Http.post" => aver_rt::http::post(&url, &body, &content_type, &extra_headers),
98        "Http.put" => aver_rt::http::put(&url, &body, &content_type, &extra_headers),
99        "Http.patch" => aver_rt::http::patch(&url, &body, &content_type, &extra_headers),
100        _ => unreachable!(),
101    };
102    response_value(result)
103}
104
105fn str_arg(val: &Value, msg: &str) -> Result<String, RuntimeError> {
106    match val {
107        Value::Str(s) => Ok(s.clone()),
108        _ => Err(RuntimeError::Error(msg.to_string())),
109    }
110}
111
112fn parse_request_headers(val: &Value) -> Result<AverList<Header>, RuntimeError> {
113    let items = list_view(val)
114        .ok_or_else(|| RuntimeError::Error("Http: headers must be a List".to_string()))?;
115    let mut out = Vec::new();
116    for item in items.iter() {
117        let fields = match item {
118            Value::Record { fields, .. } => fields,
119            _ => {
120                return Err(RuntimeError::Error(
121                    "Http: each header must be a record with 'name' and 'value' String fields"
122                        .to_string(),
123                ));
124            }
125        };
126        let get = |key: &str| -> Result<String, RuntimeError> {
127            fields
128                .iter()
129                .find(|(k, _)| k == key)
130                .and_then(|(_, v)| {
131                    if let Value::Str(s) = v {
132                        Some(s.clone())
133                    } else {
134                        None
135                    }
136                })
137                .ok_or_else(|| {
138                    RuntimeError::Error(format!(
139                        "Http: header record must have a '{}' String field",
140                        key
141                    ))
142                })
143        };
144        out.push(Header::from_strings(get("name")?, get("value")?));
145    }
146    Ok(AverList::from_vec(out))
147}
148
149fn response_value(result: Result<HttpResponse, String>) -> Result<Value, RuntimeError> {
150    match result {
151        Ok(resp) => Ok(Value::Ok(Box::new(http_response_to_value(resp)))),
152        Err(e) => Ok(Value::Err(Box::new(Value::Str(e)))),
153    }
154}
155
156pub fn register_nv(global: &mut HashMap<String, NanValue>, arena: &mut Arena) {
157    let methods = &["get", "head", "delete", "post", "put", "patch"];
158    let mut members: Vec<(Rc<str>, NanValue)> = Vec::with_capacity(methods.len());
159    for method in methods {
160        let idx = arena.push_builtin(&format!("Http.{}", method));
161        members.push((Rc::from(*method), NanValue::new_builtin(idx)));
162    }
163    let ns_idx = arena.push(crate::nan_value::ArenaEntry::Namespace {
164        name: Rc::from("Http"),
165        members,
166    });
167    global.insert("Http".to_string(), NanValue::new_namespace(ns_idx));
168}
169
170/// Bridge: convert NanValue args to Value, call old implementation, convert result back.
171pub fn call_nv(
172    name: &str,
173    args: &[NanValue],
174    arena: &mut Arena,
175) -> Option<Result<NanValue, RuntimeError>> {
176    // Check if this name is owned by us
177    if !matches!(
178        name,
179        "Http.get" | "Http.head" | "Http.delete" | "Http.post" | "Http.put" | "Http.patch"
180    ) {
181        return None;
182    }
183    let old_args: Vec<Value> = args.iter().map(|nv| nv.to_value(arena)).collect();
184    let result = call(name, &old_args)?;
185    Some(result.map(|v| NanValue::from_value(&v, arena)))
186}
187
188fn http_response_to_value(resp: HttpResponse) -> Value {
189    let headers = resp
190        .headers
191        .into_iter()
192        .map(|header| Value::Record {
193            type_name: "Header".to_string(),
194            fields: vec![
195                ("name".to_string(), Value::Str(header.name.to_string())),
196                ("value".to_string(), Value::Str(header.value.to_string())),
197            ]
198            .into(),
199        })
200        .collect();
201
202    Value::Record {
203        type_name: "HttpResponse".to_string(),
204        fields: vec![
205            ("status".to_string(), Value::Int(resp.status)),
206            ("body".to_string(), Value::Str(resp.body.to_string())),
207            ("headers".to_string(), list_from_vec(headers)),
208        ]
209        .into(),
210    }
211}
aver/services/http.rs

aver/services/
http.rs
