jschoubben
71a35a6376
The delivery repository's contracts and SDK live under modules/ as mesh-delivery-contracts and mesh-delivery-sdk, their Go module paths renamed to match the folders (the TypeScript names already did), and every importer in mesh-delivery, mesh-catalog, mesh-host, mesh-tools and mesh-sdk follows in the same group: a design as it should be, one path per module, checked by the group's check building every importer. Builds: design 47 G §427, §88 Claude-Session: https://claude.ai/code/session_01NcbgfGKaxw984XyAPfLm4h
54 lines
2.3 KiB
Go
54 lines
2.3 KiB
Go
package meshdeliverycheckerclient
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import (
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"crypto/sha256"
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"encoding/base64"
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"encoding/hex"
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"encoding/json"
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"fmt"
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checker "git.novox.be/novox/mesh-delivery/modules/mesh-delivery-contracts/go/seats/meshdeliverychecker"
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)
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// InputVerb is the seat's verb input as a manifest's `invokes` names it and a run ask's input names it: asked of the
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// seat, on no one machine (novox/hq ADR 0644, ADR 0656; issue 1921). A checking program's input is kept by the checker
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// by the sha256 of its exact bytes, and asked of it by the build module that runs the program (ADR 0596 §2).
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const InputVerb = "seat:" + checker.Seat + "." + checker.VerbInput
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// InputAnswerOf is the verb input's answer for body: its digest and its exact bytes, base64.
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func InputAnswerOf(body []byte) checker.InputAnswer {
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return checker.InputAnswer{Digest: DigestOf(body), Input: base64.StdEncoding.EncodeToString(body)}
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}
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// DigestOf is the digest a checking program's input is kept and asked by: the sha256 of its bytes, 64 lowercase hex
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// digits.
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func DigestOf(body []byte) string {
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sum := sha256.Sum256(body)
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return hex.EncodeToString(sum[:])
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}
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// ReadInput asks the verb input, with ask (a tools bundle's stdio.Ask, a process's Conn.Call), for the input kept by
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// digest and answers its bytes, refusing an answer for another digest and bytes whose sha256 is not the digest.
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func ReadInput(ask func(key string, body any) (json.RawMessage, error), digest string) ([]byte, error) {
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const who = "meshdeliverycheckerclient: "
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raw, err := ask(InputVerb, checker.InputInput{Digest: digest})
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if err != nil {
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return nil, fmt.Errorf(who+"asking %s for the input %s: %w", InputVerb, digest, err)
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}
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var a checker.InputAnswer
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if err := json.Unmarshal(raw, &a); err != nil {
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return nil, fmt.Errorf(who+"%s answered no input for %s: %w", InputVerb, digest, err)
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}
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if a.Digest != digest {
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return nil, fmt.Errorf(who+"%s answered the input %q, asked %s", InputVerb, a.Digest, digest)
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}
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body, err := base64.StdEncoding.DecodeString(a.Input)
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if err != nil {
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return nil, fmt.Errorf(who+"%s answered the input %s in no base64: %w", InputVerb, digest, err)
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}
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if got := DigestOf(body); got != digest {
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return nil, fmt.Errorf(who+"the input %s answered %d bytes whose digest is %s", digest, len(body), got)
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}
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return body, nil
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}
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