use std::collections::BTreeMap;
use std::sync::Arc;
use std::time::Duration;
use async_trait::async_trait;
use base64::Engine as _;
use serde::{Deserialize, Serialize};
use serde_json::{Value, json};
use crate::language::LanguageEngine;
use crate::pipeline::{
NodeDefinition, PipelineError,
nodes::{NodeExecutionInput, NodeExecutionOutput, NodeHandler},
};
use crate::platform::services::CredentialService;
use super::util::{eval_deno_expr, metadata_scope, resolve_path_cloned};
use crate::pipeline::model::{DslFlag, DslFlagKind, LayoutItem};
pub const NODE_KIND: &str = "n.http.request";
pub const INPUT_PIN_IN: &str = "in";
pub const OUTPUT_PIN_OUT: &str = "out";
fn default_response_type() -> String {
"json".to_string()
}
fn default_body_type() -> String {
"json".to_string()
}
pub fn definition() -> NodeDefinition {
NodeDefinition {
kind: NODE_KIND.to_string(),
title: "HTTP Request".to_string(),
description: "Perform HTTP call with support for JSON, text, and binary (bytes) responses. \
Supports JSON, raw text, and multipart form-data request bodies including __zf_bytes file parts. \
Returns normalized { request, response } envelope."
.to_string(),
input_schema: serde_json::json!({
"type":"object",
"description":"Input context used for optional body binding."
}),
output_schema: serde_json::json!({
"type":"object",
"properties":{
"request":{"type":"object"},
"response":{"type":"object"}
}
}),
input_pins: vec![INPUT_PIN_IN.to_string()],
output_pins: vec![OUTPUT_PIN_OUT.to_string()],
script_available: true,
script_bridge: Some(crate::pipeline::NodeScriptBridge {
name: "n.http.request".to_string(),
enabled: false,
}),
config_schema: Default::default(),
dsl_flags: vec![
DslFlag { flag: "--credential".to_string(), config_key: "credential_id".to_string(), description: "Optional credential for HTTP auth. secure_request: template-driven. oauth2: auto-refresh Bearer token.".to_string(), kind: DslFlagKind::Scalar, required: false },
DslFlag { flag: "--bind".to_string(), config_key: "request_bindings".to_string(), description: "Binding expression for one secure_request variable. Repeatable: --bind USER_ID=input.player_id".to_string(), kind: DslFlagKind::KeyValuePairs, required: false },
DslFlag { flag: "--url".to_string(), config_key: "url".to_string(), description: "Target URL for the HTTP request.".to_string(), kind: DslFlagKind::Scalar, required: false },
DslFlag { flag: "--url-expr".to_string(), config_key: "url_expr".to_string(), description: "JS expression returning the target URL. Evaluated against input payload at runtime.".to_string(), kind: DslFlagKind::Scalar, required: false },
DslFlag { flag: "--method".to_string(), config_key: "method".to_string(), description: "HTTP method: GET (default), POST, PUT, PATCH, DELETE.".to_string(), kind: DslFlagKind::Scalar, required: false },
DslFlag { flag: "--method-expr".to_string(), config_key: "method_expr".to_string(), description: "JS expression returning the HTTP method.".to_string(), kind: DslFlagKind::Scalar, required: false },
DslFlag { flag: "--body-path".to_string(), config_key: "body_path".to_string(), description: "Dot-notation path into input payload whose value is sent as the request body.".to_string(), kind: DslFlagKind::Scalar, required: false },
DslFlag { flag: "--body-expr".to_string(), config_key: "body_expr".to_string(), description: "JS expression returning the request body value. Evaluated against input payload.".to_string(), kind: DslFlagKind::Scalar, required: false },
DslFlag { flag: "--header".to_string(), config_key: "headers".to_string(), description: "Static request header. Repeat for each header. Format: Header-Name=value. e.g. --header Content-Type=application/json".to_string(), kind: DslFlagKind::KeyValuePairs, required: false },
DslFlag { flag: "--headers-expr".to_string(), config_key: "headers_expr".to_string(), description: "JS expression returning an object of request headers. Evaluated against input payload.".to_string(), kind: DslFlagKind::Scalar, required: false },
DslFlag { flag: "--timeout-ms".to_string(), config_key: "timeout_ms".to_string(), description: "Request timeout in milliseconds (default 10000, max 120000).".to_string(), kind: DslFlagKind::Scalar, required: false },
DslFlag { flag: "--response-type".to_string(), config_key: "response_type".to_string(), description: "How to read the response: json (default, parses body as JSON), text (raw string), bytes (base64-encoded binary with __zf_bytes convention).".to_string(), kind: DslFlagKind::Scalar, required: false },
DslFlag { flag: "--body-type".to_string(), config_key: "body_type".to_string(), description: "How to send the request body: json (default), text (raw string), form-data (multipart with __zf_bytes support).".to_string(), kind: DslFlagKind::Scalar, required: false },
],
fields: {
use crate::pipeline::model::{NodeFieldDef, NodeFieldType, SelectOptionDef};
vec![
NodeFieldDef { name: "title".to_string(), label: "Title".to_string(), field_type: NodeFieldType::Text, help: Some("Override display title for this node.".to_string()), ..Default::default() },
NodeFieldDef { name: "credential_id".to_string(), label: "Request Profile".to_string(), field_type: NodeFieldType::Select, data_source: Some(crate::pipeline::model::NodeFieldDataSource::CredentialsHttpAuth), help: Some("Credential for HTTP authentication. secure_request: template-driven request. oauth2: Bearer token auto-refresh.".to_string()), ..Default::default() },
NodeFieldDef { name: "request_bindings".to_string(), label: "Profile Bindings".to_string(), field_type: NodeFieldType::SecureRequestBindings, help: Some("JS expressions for the variables declared by the selected secure_request profile. Example: input.player_id or ctx.nodes.n3.unit.code".to_string()), span: Some("full".to_string()), ..Default::default() },
NodeFieldDef { name: "url".to_string(), label: "URL".to_string(), field_type: NodeFieldType::Text, help: Some("Fallback URL when url_expr is empty.".to_string()), default_value: Some(serde_json::json!("https://example.com")), ..Default::default() },
NodeFieldDef { name: "method".to_string(), label: "Method".to_string(), field_type: NodeFieldType::Select, options: vec!["GET","POST","PUT","PATCH","DELETE"].iter().map(|m| SelectOptionDef { value: m.to_string(), label: m.to_string() }).collect(), help: Some("Fallback HTTP method when method_expr is empty.".to_string()), ..Default::default() },
NodeFieldDef { name: "timeout_ms".to_string(), label: "Timeout (ms)".to_string(), field_type: NodeFieldType::Text, help: Some("Request timeout in milliseconds.".to_string()), ..Default::default() },
NodeFieldDef {
name: "response_type".to_string(),
label: "Response Type".to_string(),
field_type: NodeFieldType::Select,
options: vec![
SelectOptionDef { value: "json".to_string(), label: "JSON (parse body)".to_string() },
SelectOptionDef { value: "text".to_string(), label: "Text (raw string)".to_string() },
SelectOptionDef { value: "bytes".to_string(), label: "Bytes (base64 binary)".to_string() },
],
help: Some("How to read the response body. 'bytes' returns __zf_bytes convention for binary pipelines.".to_string()),
default_value: Some(json!("json")),
..Default::default()
},
NodeFieldDef {
name: "body_type".to_string(),
label: "Body Type".to_string(),
field_type: NodeFieldType::Select,
options: vec![
SelectOptionDef { value: "json".to_string(), label: "JSON".to_string() },
SelectOptionDef { value: "text".to_string(), label: "Text (raw string)".to_string() },
SelectOptionDef { value: "form-data".to_string(), label: "Form Data (multipart)".to_string() },
],
help: Some("How to send the request body. 'form-data' supports __zf_bytes objects as file parts.".to_string()),
default_value: Some(json!("json")),
..Default::default()
},
NodeFieldDef { name: "headers".to_string(), label: "Static Headers".to_string(), field_type: NodeFieldType::KeyValuePairs, help: Some("Static request headers. Overridden by headers_expr if set.".to_string()), ..Default::default() },
NodeFieldDef { name: "url_expr".to_string(), label: "URL Expr".to_string(), field_type: NodeFieldType::Textarea, rows: Some(3), help: Some("Optional JS expression returning string URL.".to_string()), ..Default::default() },
NodeFieldDef { name: "method_expr".to_string(), label: "Method Expr".to_string(), field_type: NodeFieldType::Textarea, rows: Some(3), help: Some("Optional JS expression returning string method.".to_string()), ..Default::default() },
NodeFieldDef { name: "body_path".to_string(), label: "Body Path".to_string(), field_type: NodeFieldType::Text, help: Some("Payload path used as request body when body_expr is empty.".to_string()), ..Default::default() },
NodeFieldDef { name: "headers_expr".to_string(), label: "Headers Expr".to_string(), field_type: NodeFieldType::Textarea, rows: Some(4), help: Some("JS expression returning header object. Overrides static headers.".to_string()), ..Default::default() },
NodeFieldDef { name: "body_expr".to_string(), label: "Body Expr".to_string(), field_type: NodeFieldType::Textarea, rows: Some(4), help: Some("JS expression returning request body value.".to_string()), ..Default::default() },
]
},
layout: vec![
LayoutItem::Row { row: vec![LayoutItem::Field("title".to_string()), LayoutItem::Field("credential_id".to_string())] },
LayoutItem::Field("request_bindings".to_string()),
LayoutItem::Row { row: vec![LayoutItem::Field("method".to_string()), LayoutItem::Field("timeout_ms".to_string())] },
LayoutItem::Row { row: vec![LayoutItem::Field("response_type".to_string()), LayoutItem::Field("body_type".to_string())] },
LayoutItem::Field("url".to_string()),
LayoutItem::Field("headers".to_string()),
LayoutItem::Field("body_path".to_string()),
LayoutItem::Field("url_expr".to_string()),
LayoutItem::Field("method_expr".to_string()),
LayoutItem::Field("headers_expr".to_string()),
LayoutItem::Field("body_expr".to_string()),
],
ai_tool: crate::pipeline::model::NodeAiToolDefinition {
registered: true,
tool_name: "http_request".to_string(),
tool_description: "Make an HTTP request. Args: url (required), method (GET/POST/etc.), body (string), headers (object), response_type (json/text/bytes), body_type (json/text/form-data).".to_string(),
tool_input_schema: serde_json::json!({
"type": "object",
"properties": {
"url": { "type": "string", "description": "Target URL" },
"method": { "type": "string", "description": "HTTP method (default GET)" },
"body": { "type": "string", "description": "Request body (optional)" },
"headers": { "type": "object", "description": "Additional headers (optional)" },
"response_type": { "type": "string", "description": "json (default), text, or bytes" },
"body_type": { "type": "string", "description": "json (default), text, or form-data" }
},
"required": ["url"]
}),
},
}
}
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct Config {
#[serde(default)]
pub credential_id: Option<String>,
#[serde(default)]
pub request_bindings: BTreeMap<String, String>,
#[serde(default)]
pub url: String,
#[serde(default = "default_method")]
pub method: String,
#[serde(default)]
pub headers: BTreeMap<String, String>,
#[serde(default)]
pub body_path: Option<String>,
#[serde(default)]
pub timeout_ms: Option<u64>,
#[serde(default)]
pub url_expr: Option<String>,
#[serde(default)]
pub method_expr: Option<String>,
#[serde(default)]
pub headers_expr: Option<String>,
#[serde(default)]
pub body_expr: Option<String>,
#[serde(default = "default_response_type")]
pub response_type: String,
#[serde(default = "default_body_type")]
pub body_type: String,
}
impl Default for Config {
fn default() -> Self {
Self {
credential_id: None,
request_bindings: BTreeMap::new(),
url: String::new(),
method: default_method(),
headers: BTreeMap::new(),
body_path: None,
timeout_ms: None,
url_expr: None,
method_expr: None,
headers_expr: None,
body_expr: None,
response_type: default_response_type(),
body_type: default_body_type(),
}
}
}
fn default_method() -> String {
"GET".to_string()
}
#[derive(Debug, Clone, Deserialize, Default)]
struct SecureRequestVariableDef {
name: String,
#[serde(default)]
required: bool,
#[serde(default)]
default_expr: String,
}
#[derive(Debug, Clone, Deserialize, Default)]
struct SecureRequestTemplate {
#[serde(default = "default_method")]
method: String,
#[serde(default)]
url: String,
#[serde(default)]
headers: BTreeMap<String, String>,
#[serde(default)]
body: String,
}
#[derive(Debug, Clone, Deserialize, Default)]
struct SecureRequestSecret {
#[serde(default)]
request: SecureRequestTemplate,
#[serde(default)]
variables: Vec<SecureRequestVariableDef>,
#[serde(default)]
secrets: BTreeMap<String, String>,
}
struct PreparedRequest {
url: String,
visible_url: String,
method: String,
visible_method: String,
headers: BTreeMap<String, String>,
body: Option<Value>,
redact_tokens: Vec<String>,
credential_id: Option<String>,
}
pub struct Node {
config: Config,
language: Arc<dyn LanguageEngine>,
credentials: Option<Arc<CredentialService>>,
}
impl Node {
pub fn new(
config: Config,
language: Arc<dyn LanguageEngine>,
credentials: Option<Arc<CredentialService>>,
) -> Result<Self, PipelineError> {
let url = config.url.trim();
let has_credential = !config
.credential_id
.as_deref()
.map(str::trim)
.unwrap_or_default()
.is_empty();
let url_expr_empty = config
.url_expr
.as_deref()
.map(str::trim)
.unwrap_or_default()
.is_empty();
if url.is_empty() && url_expr_empty && !has_credential {
return Err(PipelineError::new(
"FW_NODE_HTTP_REQUEST_CONFIG",
"config.url or config.credential_id must not be empty",
));
}
if !url.is_empty() && !url.starts_with("http://") && !url.starts_with("https://") {
return Err(PipelineError::new(
"FW_NODE_HTTP_REQUEST_CONFIG",
"config.url must start with http:// or https://",
));
}
Ok(Self {
config,
language,
credentials,
})
}
}
#[async_trait]
impl NodeHandler for Node {
fn kind(&self) -> &'static str {
NODE_KIND
}
fn input_pins(&self) -> &'static [&'static str] {
&[INPUT_PIN_IN]
}
fn output_pins(&self) -> &'static [&'static str] {
&[OUTPUT_PIN_OUT]
}
async fn execute_async(
&self,
input: NodeExecutionInput,
) -> Result<NodeExecutionOutput, PipelineError> {
if input.input_pin != INPUT_PIN_IN {
return Err(PipelineError::new(
"FW_NODE_HTTP_REQUEST_INPUT_PIN",
format!("unsupported input pin '{}'", input.input_pin),
));
}
let timeout_ms = self.config.timeout_ms.unwrap_or(10_000).clamp(100, 120_000);
let prepared = if let Some(credential_id) = self
.config
.credential_id
.as_deref()
.map(str::trim)
.filter(|v| !v.is_empty())
{
let Some(credentials) = &self.credentials else {
return Err(PipelineError::new(
"FW_NODE_HTTP_REQUEST_CREDENTIALS_UNAVAILABLE",
"credential service is not configured on this pipeline engine",
));
};
let (owner, project, _, _) = metadata_scope(&input.metadata)?;
let credential = credentials
.get_project_credential(owner, project, credential_id)
.map_err(|err| {
PipelineError::new("FW_NODE_HTTP_REQUEST_CREDENTIAL", err.to_string())
})?
.ok_or_else(|| {
PipelineError::new(
"FW_NODE_HTTP_REQUEST_CREDENTIAL_MISSING",
format!("credential '{}' not found", credential_id),
)
})?;
match credential.kind.as_str() {
"secure_request" => build_request_from_secure_credential(
credential_id,
self.language.as_ref(),
&self.config,
&credential.secret,
&input.payload,
&input.metadata,
)?,
"oauth2" => {
let token = credentials
.get_valid_oauth2_token(owner, project, credential_id)
.await
.map_err(|err| {
PipelineError::new("FW_NODE_HTTP_REQUEST_OAUTH2", err.to_string())
})?;
let url = resolve_http_string_binding(
self.language.as_ref(),
&input.payload,
&input.metadata,
self.config.url_expr.as_deref(),
&self.config.url,
"url",
)?;
if !url.starts_with("http://") && !url.starts_with("https://") {
return Err(PipelineError::new(
"FW_NODE_HTTP_REQUEST_CONFIG",
"resolved url must start with http:// or https://",
));
}
let method = resolve_http_string_binding(
self.language.as_ref(),
&input.payload,
&input.metadata,
self.config.method_expr.as_deref(),
&self.config.method,
"method",
)?
.to_uppercase();
let mut headers = if let Some(expr) = self.config.headers_expr.as_deref() {
let value = eval_deno_expr(
self.language.as_ref(),
expr,
&input.payload,
&input.metadata,
)?;
parse_headers(value)?
} else {
self.config.headers.clone()
};
headers.insert("Authorization".to_string(), format!("Bearer {token}"));
let body_value = if let Some(expr) = self.config.body_expr.as_deref() {
Some(eval_deno_expr(
self.language.as_ref(),
expr,
&input.payload,
&input.metadata,
)?)
} else {
resolve_path_cloned(&input.payload, self.config.body_path.as_deref())
};
PreparedRequest {
visible_url: url.clone(),
url,
visible_method: method.clone(),
method,
headers,
body: body_value,
redact_tokens: vec![token],
credential_id: Some(credential_id.to_string()),
}
}
other => {
return Err(PipelineError::new(
"FW_NODE_HTTP_REQUEST_CREDENTIAL_KIND",
format!(
"credential '{}' has kind '{}' — expected secure_request or oauth2",
credential.credential_id, other
),
));
}
}
} else {
let url = resolve_http_string_binding(
self.language.as_ref(),
&input.payload,
&input.metadata,
self.config.url_expr.as_deref(),
&self.config.url,
"url",
)?;
if !url.starts_with("http://") && !url.starts_with("https://") {
return Err(PipelineError::new(
"FW_NODE_HTTP_REQUEST_CONFIG",
"resolved url must start with http:// or https://",
));
}
let method = resolve_http_string_binding(
self.language.as_ref(),
&input.payload,
&input.metadata,
self.config.method_expr.as_deref(),
&self.config.method,
"method",
)?
.to_uppercase();
let headers = if let Some(expr) = self.config.headers_expr.as_deref() {
let value = eval_deno_expr(
self.language.as_ref(),
expr,
&input.payload,
&input.metadata,
)?;
parse_headers(value)?
} else {
self.config.headers.clone()
};
let body_value = if let Some(expr) = self.config.body_expr.as_deref() {
Some(eval_deno_expr(
self.language.as_ref(),
expr,
&input.payload,
&input.metadata,
)?)
} else {
resolve_path_cloned(&input.payload, self.config.body_path.as_deref())
};
PreparedRequest {
visible_url: url.clone(),
url,
visible_method: method.clone(),
method,
headers,
body: body_value,
redact_tokens: Vec::new(),
credential_id: None,
}
};
let request_visible_url = prepared.visible_url.clone();
let request_method = prepared.visible_method.clone();
let request_credential_id = prepared.credential_id.clone();
crate::pipeline::security::validate_outbound_http_url(&prepared.url, NODE_KIND)?;
let client = reqwest::Client::builder()
.timeout(Duration::from_millis(timeout_ms))
.build()
.map_err(|e| PipelineError::new("FW_NODE_HTTP_REQUEST_CLIENT", e.to_string()))?;
let method_parsed = reqwest::Method::from_bytes(prepared.method.as_bytes())
.map_err(|e| PipelineError::new("FW_NODE_HTTP_REQUEST_METHOD", e.to_string()))?;
let mut req = client.request(method_parsed.clone(), &prepared.url);
for (key, value) in &prepared.headers {
req = req.header(key.as_str(), value.as_str());
}
let body_type = self.config.body_type.trim().to_lowercase();
let has_body = !matches!(
method_parsed.as_str(),
"GET" | "HEAD" | "DELETE" | "OPTIONS"
);
if has_body {
if let Some(body) = &prepared.body {
match body_type.as_str() {
"form-data" => {
req = build_multipart_request(req, body)?;
}
"text" => {
let body_str = match body {
Value::String(s) => s.clone(),
other => other.to_string(),
};
if !prepared
.headers
.keys()
.any(|k| k.to_lowercase() == "content-type")
{
req = req.header("content-type", "text/plain");
}
req = req.body(body_str);
}
_ => {
let body_str = match body {
Value::String(s) => s.clone(),
other => other.to_string(),
};
if !prepared
.headers
.keys()
.any(|k| k.to_lowercase() == "content-type")
{
req = req.header("content-type", "application/json");
}
req = req.body(body_str);
}
}
}
}
let transport_visible_url = prepared.visible_url.clone();
let transport_raw_url = prepared.url.clone();
let resp = req.send().await.map_err(|err| {
let mut message = err.to_string();
if transport_raw_url != transport_visible_url && !transport_visible_url.is_empty() {
message = message.replace(&transport_raw_url, &transport_visible_url);
}
PipelineError::new("FW_NODE_HTTP_REQUEST_TRANSPORT", message)
})?;
let status = resp.status().as_u16();
let content_type = resp
.headers()
.get("content-type")
.and_then(|v| v.to_str().ok())
.unwrap_or("application/octet-stream")
.to_string();
let response_type = self.config.response_type.trim().to_lowercase();
let body: Value = match response_type.as_str() {
"bytes" => {
let bytes = resp.bytes().await.map_err(|err| {
PipelineError::new("FW_NODE_HTTP_REQUEST_READ_BODY", err.to_string())
})?;
let encoded = base64::engine::general_purpose::STANDARD.encode(&bytes);
json!({
"__zf_bytes": encoded,
"__zf_mime": content_type,
"__zf_size": bytes.len()
})
}
"text" => {
let text = resp.text().await.map_err(|err| {
PipelineError::new("FW_NODE_HTTP_REQUEST_READ_BODY", err.to_string())
})?;
Value::String(text)
}
_ => {
let text = resp.text().await.map_err(|err| {
PipelineError::new("FW_NODE_HTTP_REQUEST_READ_BODY", err.to_string())
})?;
serde_json::from_str::<Value>(&text).unwrap_or(Value::String(text))
}
};
let request_obj = if let Some(credential_id) = request_credential_id {
json!({
"credential_id": credential_id,
"secured": true,
"url": request_visible_url,
"method": request_method,
"timeout_ms": timeout_ms
})
} else {
json!({
"url": request_visible_url,
"method": request_method,
"timeout_ms": timeout_ms
})
};
let response_obj = json!({
"status": status,
"ok": (200..400).contains(&status),
"content_type": content_type,
"body": body
});
let mut payload = json!({ "request": request_obj, "response": response_obj });
if !prepared.redact_tokens.is_empty() {
if let Value::Object(map) = &mut payload {
map.insert(
"__zf_private_redact".to_string(),
Value::Array(
prepared
.redact_tokens
.iter()
.map(|item| Value::String(item.clone()))
.collect(),
),
);
map.insert(
"__zf_private_redact_except_paths".to_string(),
Value::Array(vec![Value::String("response.body".to_string())]),
);
}
}
Ok(NodeExecutionOutput {
output_pins: vec![OUTPUT_PIN_OUT.to_string()],
payload,
trace: vec![format!("node_kind={NODE_KIND}")],
})
}
}
fn build_multipart_request(
req: reqwest::RequestBuilder,
body: &Value,
) -> Result<reqwest::RequestBuilder, PipelineError> {
let map = match body {
Value::Object(m) => m,
_ => {
return Err(PipelineError::new(
"FW_NODE_HTTP_REQUEST_BODY",
"form-data body_type requires an object value (from body_path or body_expr)",
));
}
};
let mut form = reqwest::multipart::Form::new();
for (key, value) in map {
match value {
Value::Object(obj) if obj.contains_key("__zf_bytes") => {
let b64 = obj
.get("__zf_bytes")
.and_then(|v| v.as_str())
.unwrap_or_default();
let mime = obj
.get("__zf_mime")
.and_then(|v| v.as_str())
.unwrap_or("application/octet-stream");
let bytes = base64::engine::general_purpose::STANDARD
.decode(b64)
.map_err(|e| {
PipelineError::new(
"FW_NODE_HTTP_REQUEST_BODY",
format!("form-data: base64 decode error for field '{key}': {e}"),
)
})?;
let filename = derive_filename_from_mime(mime);
let part = reqwest::multipart::Part::bytes(bytes)
.file_name(filename)
.mime_str(mime)
.map_err(|e| {
PipelineError::new(
"FW_NODE_HTTP_REQUEST_BODY",
format!("form-data: invalid mime for field '{key}': {e}"),
)
})?;
form = form.part(key.clone(), part);
}
Value::String(s) => {
form = form.text(key.clone(), s.clone());
}
Value::Number(n) => {
form = form.text(key.clone(), n.to_string());
}
Value::Bool(b) => {
form = form.text(key.clone(), b.to_string());
}
Value::Null => {}
other => {
form = form.text(key.clone(), other.to_string());
}
}
}
Ok(req.multipart(form))
}
fn derive_filename_from_mime(mime: &str) -> String {
let base = mime.split(';').next().unwrap_or("").trim();
let ext = match base {
"audio/mpeg" => "mp3",
"audio/wav" | "audio/x-wav" => "wav",
"audio/ogg" => "ogg",
"audio/mp4" | "audio/m4a" => "m4a",
"image/jpeg" => "jpg",
"image/png" => "png",
"image/webp" => "webp",
"image/gif" => "gif",
"application/pdf" => "pdf",
"video/mp4" => "mp4",
"video/webm" => "webm",
"application/octet-stream" => "bin",
_ => "bin",
};
format!("download.{ext}")
}
fn resolve_http_string_binding(
language: &dyn LanguageEngine,
input: &Value,
metadata: &Value,
expr: Option<&str>,
fallback: &str,
field: &str,
) -> Result<String, PipelineError> {
if let Some(expr) = expr {
let value = eval_deno_expr(language, expr, input, metadata)?;
return value.as_str().map(ToString::to_string).ok_or_else(|| {
PipelineError::new(
"FW_NODE_HTTP_REQUEST_BINDING",
format!("binding expression for '{field}' must return string"),
)
});
}
let out = fallback.trim();
if out.is_empty() {
return Err(PipelineError::new(
"FW_NODE_HTTP_REQUEST_BINDING",
format!("resolved '{field}' must not be empty"),
));
}
Ok(out.to_string())
}
fn build_request_from_secure_credential(
credential_id: &str,
language: &dyn LanguageEngine,
config: &Config,
credential_secret: &Value,
input: &Value,
metadata: &Value,
) -> Result<PreparedRequest, PipelineError> {
let secret: SecureRequestSecret =
serde_json::from_value(credential_secret.clone()).map_err(|err| {
PipelineError::new(
"FW_NODE_HTTP_REQUEST_SECURE_REQUEST",
format!("invalid secure_request secret: {err}"),
)
})?;
if secret.request.url.trim().is_empty() {
return Err(PipelineError::new(
"FW_NODE_HTTP_REQUEST_SECURE_REQUEST",
"secure_request credential requires secret.request.url",
));
}
let bindings = resolve_secure_request_bindings(language, config, &secret, input, metadata)?;
let mut tokens = secret.secrets.clone();
for (key, value) in bindings {
tokens.insert(key, value);
}
let redact_tokens = tokens
.values()
.filter_map(|item| {
let trimmed = item.trim();
if trimmed.is_empty() {
None
} else {
Some(trimmed.to_string())
}
})
.collect::<Vec<_>>();
let url = render_secure_request_template(&secret.request.url, &tokens);
if !url.starts_with("http://") && !url.starts_with("https://") {
return Err(PipelineError::new(
"FW_NODE_HTTP_REQUEST_SECURE_REQUEST",
"resolved secure_request url must start with http:// or https://",
));
}
let method = render_secure_request_template(&secret.request.method, &tokens).to_uppercase();
let headers = secret
.request
.headers
.iter()
.map(|(key, value)| (key.clone(), render_secure_request_template(value, &tokens)))
.collect::<BTreeMap<_, _>>();
let body = if secret.request.body.trim().is_empty() {
None
} else {
Some(Value::String(render_secure_request_template(
&secret.request.body,
&tokens,
)))
};
Ok(PreparedRequest {
visible_url: "••••••".to_string(),
url,
method,
visible_method: "••••••".to_string(),
headers,
body,
redact_tokens,
credential_id: Some(credential_id.to_string()),
})
}
fn resolve_secure_request_bindings(
language: &dyn LanguageEngine,
config: &Config,
credential: &SecureRequestSecret,
input: &Value,
metadata: &Value,
) -> Result<BTreeMap<String, String>, PipelineError> {
let mut out = BTreeMap::new();
for item in &credential.variables {
let expr = config
.request_bindings
.get(&item.name)
.map(|value| value.trim())
.filter(|value| !value.is_empty())
.map(ToString::to_string)
.or_else(|| {
let fallback = item.default_expr.trim();
if fallback.is_empty() {
None
} else {
Some(fallback.to_string())
}
});
let Some(expr) = expr else {
if item.required {
return Err(PipelineError::new(
"FW_NODE_HTTP_REQUEST_BINDING",
format!("missing required secure_request binding '{}'", item.name),
));
}
continue;
};
out.insert(
item.name.clone(),
eval_binding_to_string(language, &expr, input, metadata)?,
);
}
for (key, expr) in &config.request_bindings {
if out.contains_key(key) {
continue;
}
let expr = expr.trim();
if expr.is_empty() {
continue;
}
out.insert(
key.clone(),
eval_binding_to_string(language, expr, input, metadata)?,
);
}
Ok(out)
}
fn eval_binding_to_string(
language: &dyn LanguageEngine,
expr: &str,
input: &Value,
metadata: &Value,
) -> Result<String, PipelineError> {
let value = eval_deno_expr(language, expr, input, metadata)?;
match value {
Value::Null => Ok(String::new()),
Value::String(value) => Ok(value),
Value::Bool(value) => Ok(value.to_string()),
Value::Number(value) => Ok(value.to_string()),
other => Ok(other.to_string()),
}
}
fn render_secure_request_template(template: &str, tokens: &BTreeMap<String, String>) -> String {
let mut out = template.to_string();
for (key, value) in tokens {
let placeholder = format!("<{key}>");
out = out.replace(&placeholder, value);
}
out
}
fn parse_headers(value: Value) -> Result<BTreeMap<String, String>, PipelineError> {
let mut out = BTreeMap::new();
let Value::Object(map) = value else {
return Err(PipelineError::new(
"FW_NODE_HTTP_REQUEST_BINDING",
"headers_expr must return object",
));
};
for (k, v) in map {
let Some(s) = v.as_str() else {
return Err(PipelineError::new(
"FW_NODE_HTTP_REQUEST_BINDING",
"headers_expr values must be strings",
));
};
out.insert(k, s.to_string());
}
Ok(out)
}
#[cfg(test)]
mod tests {
use std::sync::Arc;
use std::time::Duration;
use axum::{Json, Router, routing::get};
use reqwest::StatusCode;
use serde_json::{Value, json};
use tokio::net::TcpListener;
use tokio::time::timeout;
use crate::language::NoopLanguageEngine;
use crate::pipeline::nodes::{NodeExecutionInput, NodeHandler};
use super::{Config, INPUT_PIN_IN, Node, build_request_from_secure_credential};
#[tokio::test(flavor = "current_thread")]
async fn self_call_to_private_network_is_blocked_from_same_server_request_handler() {
let listener = TcpListener::bind("127.0.0.1:0")
.await
.expect("bind test server");
let addr = listener.local_addr().expect("resolve test server addr");
let echo_url = format!("http://{addr}/echo");
let app = Router::new()
.route("/echo", get(|| async { Json(json!({ "ok": true })) }))
.route(
"/self",
get({
let echo_url = echo_url.clone();
move || {
let echo_url = echo_url.clone();
async move {
let node = Node::new(
Config {
url: echo_url,
method: "GET".to_string(),
timeout_ms: Some(1_000),
..Default::default()
},
Arc::new(NoopLanguageEngine),
None,
)
.expect("build http.request node");
let err = node
.execute_async(NodeExecutionInput {
node_id: "n0".to_string(),
input_pin: INPUT_PIN_IN.to_string(),
payload: json!({}),
metadata: json!({}),
step_tx: None,
})
.await
.expect_err("self-call should be blocked");
Json(json!({ "code": err.code, "message": err.message }))
}
}
}),
);
let server = tokio::spawn(async move {
axum::serve(listener, app).await.expect("serve test app");
});
let client = reqwest::Client::builder()
.timeout(Duration::from_secs(2))
.build()
.expect("build client");
let response = timeout(
Duration::from_secs(2),
client.get(format!("http://{addr}/self")).send(),
)
.await
.expect("outer timeout waiting for self handler")
.expect("send request to self handler");
assert_eq!(response.status(), StatusCode::OK);
let payload: Value = response.json().await.expect("decode response payload");
assert_eq!(payload["code"], "FW_EGRESS_DENIED");
server.abort();
}
#[test]
fn secure_request_masks_credential_owned_request_fields() {
let prepared = build_request_from_secure_credential(
"salam-login-request",
&NoopLanguageEngine,
&Config::default(),
&json!({
"request": {
"method": "POST",
"url": "https://api.uinsgd.ac.id/salam/v1/index.php/auth/login",
"headers": {
"Content-Type": "application/x-www-form-urlencoded"
},
"body": "username=<USERNAME>&password=<PASSWORD>"
},
"variables": [],
"secrets": {}
}),
&json!({}),
&json!({}),
)
.expect("build prepared request");
assert_eq!(prepared.visible_url, "••••••");
assert_eq!(prepared.visible_method, "••••••");
assert_eq!(
prepared.credential_id.as_deref(),
Some("salam-login-request")
);
assert_eq!(
prepared.url,
"https://api.uinsgd.ac.id/salam/v1/index.php/auth/login"
);
assert_eq!(prepared.method, "POST");
}
}