arcrun — AI workflow execution engine (clean history)
Self-hosted 開源：WASM 零件 + recipe + cypher-executor，跑在你自己的 Cloudflare。 此為重建的乾淨歷史起點（移除曾誤 commit 的 GCP SA 金鑰，舊歷史保留在 richblack/arcrun 與本地 backup 分支）。含： - acr init --self-hosted installer（建 KV/R2 + codeload 拉預編譯 wasm + wrangler deploy + seed recipe） - recipe push 把關（資料外流提醒 + 打通檢查） - 19 個正當零件預編譯 wasm（claude_api/km_writer/kbdb_upsert_block 排除：違反 DECISIONS §1） - CLI / cypher-executor / registry / 完整 SDD Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
uncle6me-web
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canonical_id: "http_request"
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display_name: "HTTP 請求"
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category: "api"
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version: "v1"
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wasi_target: "preview1"
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stability: "floating"
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runtime_compat:
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- "cf-workers"
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- "workerd"
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- "wazero"
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constraints:
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max_size_kb: 2048
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max_cold_start_ms: 50
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no_network_syscall: false
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no_filesystem_syscall: true
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io_model: "stdin_stdout_json"
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input_schema:
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type: object
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required: [url]
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properties:
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url:
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type: string
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description: 目標 URL（必填）
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method:
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type: string
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description: HTTP 方法（GET / POST / PUT / DELETE 等），預設 GET
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default: GET
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headers:
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type: object
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description: 自訂 HTTP headers（key-value 物件）
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additionalProperties:
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type: string
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body:
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type: string
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description: 模式 A — body 字串（自行 stringify 後傳）
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body_json:
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type: object
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description: 模式 B — body 物件，零件內部 JSON.stringify（yaml 端不用手組字串）
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output_schema:
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type: object
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properties:
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success:
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type: boolean
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data:
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type: object
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properties:
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body:
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type: string
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description: HTTP 回應 body（字串）
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gherkin_tests:
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- scenario: "缺少 url"
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given: '{"method":"GET"}'
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then_contains: '{"success":false'
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- scenario: "基本 GET 請求"
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given: '{"url":"https://example.com"}'
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then_contains: '{"success":true'
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tags: [integration, http, request, api]
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description: "發送任意 HTTP 請求並回傳 status 與 body。透過 host function 呼叫，.wasm 本身不含網路 syscall。headers 由用戶手動填入。"
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config_example: |
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http_call: # 節點名稱（可自訂）
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url: "" # 目標 URL（必填）
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method: "GET" # HTTP 方法（選填，預設 GET）
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headers: # 自訂 headers（選填，用戶手動填入）
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Content-Type: "application/json"
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Authorization: "Bearer <your_token>"
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body: {} # 請求 body（選填）
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@@ -0,0 +1,3 @@
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module component
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go 1.21
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@@ -0,0 +1,138 @@
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// http_request — 發送任意 HTTP 請求，回傳 status + body
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// 透過 host function 發出 HTTP，.wasm 本身不含網路 syscall
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//
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//go:build tinygo
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package main
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import (
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"encoding/json"
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"io"
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"os"
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"unsafe"
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)
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// host function 宣告（由 WASI shim 注入）
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//
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//go:wasmimport u6u http_request
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func hostHttpRequest(
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urlPtr uintptr, urlLen uint32,
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methodPtr uintptr, methodLen uint32,
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headersPtr uintptr, headersLen uint32,
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bodyPtr uintptr, bodyLen uint32,
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outPtr uintptr, outLenPtr uintptr,
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) uint32
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type Input struct {
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URL string `json:"url"`
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Method string `json:"method"`
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Headers map[string]string `json:"headers"`
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Body string `json:"body"` // 模式 A：直接 string body
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BodyJSON map[string]interface{} `json:"body_json"` // 模式 B：物件，內部 stringify（避免 yaml 端要自己組 JSON 字串）
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}
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// dummy byte for safe zero-length unsafe.Pointer operations
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var dummy [1]byte
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// safePtr returns a valid pointer for an empty-or-nonempty byte slice.
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// TinyGo panics with "index out of range" when taking &b[0] on empty b.
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func safePtr(b []byte) (uintptr, uint32) {
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if len(b) == 0 {
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return uintptr(unsafe.Pointer(&dummy[0])), 0
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}
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return uintptr(unsafe.Pointer(&b[0])), uint32(len(b))
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}
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func main() {
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raw, err := io.ReadAll(os.Stdin)
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if err != nil {
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writeError("failed to read stdin: " + err.Error())
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return
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}
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var input Input
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if err := json.Unmarshal(raw, &input); err != nil {
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writeError("invalid input JSON: " + err.Error())
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return
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}
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if input.URL == "" {
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writeError("url 必填")
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return
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}
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method := input.Method
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if method == "" {
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method = "GET"
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}
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headersJSON := "{}"
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if len(input.Headers) > 0 {
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b, _ := json.Marshal(input.Headers)
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headersJSON = string(b)
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}
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// body 來源優先順序：body_json（物件 → JSON 字串）> body（直接 string）
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bodyStr := input.Body
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if input.BodyJSON != nil {
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b, err := json.Marshal(input.BodyJSON)
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if err == nil {
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bodyStr = string(b)
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}
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}
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urlBytes := []byte(input.URL)
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methodBytes := []byte(method)
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headersBytes := []byte(headersJSON)
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bodyBytes := []byte(bodyStr)
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outBuf := make([]byte, 65536) // 64KB output buffer
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var outLen uint32
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urlPtr, urlLen := safePtr(urlBytes)
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methodPtr, methodLen := safePtr(methodBytes)
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headersPtr, headersLen := safePtr(headersBytes)
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bodyPtr, bodyLen := safePtr(bodyBytes)
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result := hostHttpRequest(
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urlPtr, urlLen,
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methodPtr, methodLen,
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headersPtr, headersLen,
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bodyPtr, bodyLen,
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uintptr(unsafe.Pointer(&outBuf[0])), uintptr(unsafe.Pointer(&outLen)),
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)
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if result != 0 {
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writeError("HTTP request failed")
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return
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}
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responseStr := string(outBuf[:outLen])
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// 2026-05-14：偵測 JSON `{"error":"..."}` 模式視為 4xx 失敗
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// 理由：host function 沒回 HTTP status code（架構債），先用 body 啟發式 catch。
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// 標準 API（cypher-executor / KBDB / 多數 REST）失敗時都回 {"error":...} JSON。
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// 對應 SDD: arcrun.md 三-A P1 #4「http_request status code 缺乏 surface」。
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var parsed map[string]interface{}
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if err := json.Unmarshal([]byte(responseStr), &parsed); err == nil {
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if errVal, ok := parsed["error"]; ok && errVal != nil {
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out, _ := json.Marshal(map[string]interface{}{
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"success": false,
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"error": errVal,
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"data": map[string]interface{}{"body": responseStr},
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})
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os.Stdout.Write(out)
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return
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}
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}
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out, _ := json.Marshal(map[string]interface{}{
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"success": true,
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"data": map[string]interface{}{"body": responseStr},
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})
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os.Stdout.Write(out)
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}
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func writeError(msg string) {
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out, _ := json.Marshal(map[string]interface{}{"success": false, "error": msg})
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os.Stdout.Write(out)
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}
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