errors

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 Go to latest Published: Sep 11, 2026 License: Apache-2.0 Imports: 15 Imported by: 0

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Index

Constants

View Source 
const (
	ExitCodeAPI        = 1
	ExitCodeAuth       = 2
	ExitCodeValidation = 3
	ExitCodeDiscovery  = 6
	ExitCodeInternal   = 5
)

类别专属退出码常量（B171/B172，权威 = 规划 v1.2 OQ-1 定案，契约规范 §4）。 ExitCode() 的 switch 用内联字面量，本组常量由 exitcodes.go 的 exitCodeByCategory 映射表引用，值与内联字面量一一对应（同源不双轨）。 修改任一值必须先同步 ExitCode() 的 switch 分支与 internal/output 侧码表。

View Source 
const DoctorCommand = "dws doctor --json"

DoctorCommand 是机器错误信封中的稳定体检入口。 actions 字段承载可直接执行的补救命令，因此这里保持纯命令形式，不混入说明文字。

View Source 
const DoctorHumanCommand = "dws doctor"

DoctorHumanCommand 保留 doctor 面向真人的默认可读输出。

View Source 
const ExitCodePartial = 7

退出码表（规划 v1.2 OQ-1 定案；契约规范 §4；轮10裁决⑬——保留现行码表， 仅新增 partial_failure 专用码，不做 wire 破坏性重排）： 

0  success / pending（异步受理不是失败）
1  api            （CategoryAPI）
2  auth           （CategoryAuth）
3  validation     （CategoryValidation；confirmation_required 子类共享此码，
                   以 reason/subtype 区分，AC-13）
4  PAT            （PATError 专属，见 pat.go ExitCodePermission；Category 不占用）
5  internal       （CategoryInternal 与兜底：非结构化错误、panic 收敛均归 5）
6  discovery      （CategoryDiscovery）
7  partial_failure（部分成功专用码，见 ExitCodePartial）

ExitCodePartial is the partial-result exit code shared with internal/output. It is not returned for CategoryPartial errors because they lack the typed succeeded/failed/unknown payload required for an honest partial result.

View Source 
const ExitCodePermission = 4

ExitCodePermission is the process exit code for PAT authorisation failures.

Variables

View Source 
var (
	ErrInvalidResourceName = stderrors.New("invalid resource name")
	ErrUnsafePath          = stderrors.New("unsafe path detected")
)
View Source 
var WireStableErrorBodyFields = []string{
	"type",
	"subtype",
	"code",
	"retryable",
	"retry_after_seconds",
	"message",
	"hint",
	"actions",
	"trace_id",
	"rpc_code",
	"rpc_data",
}

WireStableErrorBodyFields 是 error 对象体（不含顶层 outcome）的 wire-stable 字段名子集。

View Source 
var WireStableFields = []string{
	"type",
	"subtype",
	"code",
	"retryable",
	"retry_after_seconds",
	"message",
	"hint",
	"actions",
	"trace_id",
	"rpc_code",
	"rpc_data",
	"outcome",
}

WireStableFields 是错误信封 wire-stable 字段名全集（含 outcome）。

Functions

func ApplyHostMutations added in v1.0.18 

func ApplyHostMutations(out map[string]any)

ApplyHostMutations writes the two stderr-JSON fields the host integration contract requires onto out["data"]:

  • data.hostControl: present iff the CLI is in host-owned mode (i.e. HostControlBlock returns non-nil); legacy data.callbacks is stripped in the same pass so passive classifier and active retry paths stay byte-for-byte aligned.
  • data.openBrowser: always present; reflects the user's PAT browser policy.

Centralizing the two writes here is the single-injection invariant — any caller that produces a PAT-shaped stderr payload (cleanPATJSON, active-retry enrichers, scope-required builders) MUST go through this function instead of writing the fields directly. out["data"] is promoted to map[string]any if missing or of the wrong type.

func ClassifyMCPResponseText added in v1.0.11 

func ClassifyMCPResponseText(text string) error

ClassifyMCPResponseText classifies a text response returned by an MCP tool call. Returns a typed error for known gateway auth failures, PAT interceptions, and business-level errors embedded in HTTP-200 JSON bodies.

Check order: DWS gateway > PAT permission > generic business error.

func ClassifyToolResultContent added in v1.0.11 

func ClassifyToolResultContent(content map[string]any) error

ClassifyToolResultContent checks a raw MCP tool result content map for DWS gateway auth errors and PAT permission error codes. This is intended for use as the edition.Hooks.ClassifyToolResult callback so the framework's runner returns a typed error before its generic business-error classification.

Check order: DWS gateway auth > PAT permission.

func ExitCode 

func ExitCode(err error) int

ExitCode maps any error to a stable exit code.

func HostControlBlock added in v1.0.18 

func HostControlBlock() map[string]any

HostControlBlock returns the canonical hostControl map injected into PAT stderr JSON when the CLI is operating in host-owned mode, or nil when it is not. The returned map is safe for the caller to mutate because a new map is constructed on each call.

callbackOwner is kept as a legacy compatibility key for hosts that adopted it before the contract converged on the hostControl single injection point.

func HumanRecoveryActions added in v1.0.61 

func HumanRecoveryActions(err error) []string

HumanRecoveryActions 与 RecoveryActions 使用同一适用性策略，但把规范的 Agent 体检命令投影为 doctor 默认的人类可读模式。

func IsConfirmationRequired added in v1.0.60 

func IsConfirmationRequired(err error) bool

IsConfirmationRequired reports whether err (or any wrapped cause) is a typed framework confirmation-gate failure carrying reason confirmation_required. Downstream classifiers must pass such errors through verbatim: the "re-run with --yes" semantics can only be carried by the machine-readable reason, while message-text classification actively misroutes them (a command path containing "permission" would be reported as an auth failure, and any other wording degrades to an unclassified error).

func IsMCPToolNotFound added in v1.0.62 

func IsMCPToolNotFound(err error) bool

IsMCPToolNotFound reports whether an MCP call failed because the selected server does not expose that tool name. Callers may use it to fall back between reviewed read-only aliases, never to replay a write.

func IsPATError added in v1.0.11 

func IsPATError(err error) bool

IsPATError reports whether err is a *PATError.

func IsPATNoPermissionCode added in v1.0.11 

func IsPATNoPermissionCode(code string) bool

IsPATNoPermissionCode reports whether code is a known PAT permission error code.

func NewAPI 

func NewAPI(message string, opts ...Option) error

NewAPI returns an API-category error.

func NewAuth 

func NewAuth(message string, opts ...Option) error

NewAuth returns an auth-category error.

func NewDiscovery 

func NewDiscovery(message string, opts ...Option) error

NewDiscovery returns a discovery-category error.

func NewInternal 

func NewInternal(message string, opts ...Option) error

NewInternal returns an internal-category error.

func NewValidation 

func NewValidation(message string, opts ...Option) error

NewValidation returns a validation-category error.

func PATAuthorizationURL added in v1.0.26 

func PATAuthorizationURL(rawURI string) string

PATAuthorizationURL returns the best URL for hosts to open or show to users. It keeps already-complete PAT URLs unchanged. For DingTalk's legacy /fe/old#%2FpersonalAuthorization?... hash-route form, it adds the explicit hash query and decoded fragment route used by the working authorization page.

func PATOpenBrowserValue added in v1.0.18 

func PATOpenBrowserValue() bool

PATOpenBrowserValue returns the effective browser-open recommendation to embed in PAT JSON payloads. The open-source fallback is true to preserve historical behavior when no provider is wired.

func PrintHuman 

func PrintHuman(w io.Writer, err error) error

PrintHuman writes a concise human-readable error rendering at normal verbosity.

func PrintHumanAt added in v1.0.5 

func PrintHumanAt(w io.Writer, err error, v Verbosity) error

PrintHumanAt writes a human-readable error rendering at the given verbosity level.

func PrintJSON 

func PrintJSON(w io.Writer, err error) error

PrintJSON writes the legacy machine-readable JSON error object.

This wire predates the unified result framework and is intentionally kept byte-compatible for commands whose rollout is legacy_only or dual_validate. Unified commands publish outcome/type/subtype through internal/output only.

func RecoveryActions added in v1.0.61 

func RecoveryActions(err error) []string

RecoveryActions 返回错误最终应该交付的恢复动作。

命令构造侧仍可声明更具体的动作；本函数只在 doctor 能诊断的认证或网络故障上 补齐稳定入口。权限、参数、确认门禁和上游业务错误不会被机械地 引导到 doctor，避免用本地体检掩盖明确的业务修复路径。 路由只读取 wire-stable 的 Category/Reason，不根据 Message/Hint 文案分支。

func RejectCRLF 

func RejectCRLF(value, fieldName string) error

RejectCRLF rejects strings containing carriage return (\r) or line feed (\n). These characters enable MIME/HTTP header injection and must never appear in header field names, values, Content-ID, or filename parameters.

func RejectControlChars 

func RejectControlChars(value, flagName string) error

RejectControlChars rejects C0 control characters (except \t and \n) and dangerous Unicode characters from user input.

Control characters cause subtle security issues:

  • Null bytes truncate strings at the C layer
  • \r\n enables HTTP header injection
  • Unicode Bidi characters allow visual spoofing (e.g. making "report.exe" display as "report.txt")

Tab and newline are allowed as they may appear in legitimate multi-line input.

func ResourceName 

func ResourceName(name string) error

func SafeInputPath 

func SafeInputPath(path string) (string, error)

SafeInputPath validates an upload/read source path for --file flags. It applies the same rules as SafeOutputPath — rejecting absolute paths, resolving symlinks, and enforcing working directory containment — to prevent an AI Agent from being tricked into reading sensitive files like /etc/passwd.

func SafeLocalFlagPath 

func SafeLocalFlagPath(flagName, value string) (string, error)

SafeLocalFlagPath validates a flag value as a local file path. Empty values and http/https URLs are returned unchanged without validation, allowing the caller to handle non-path inputs (e.g. API keys, URLs) upstream. For all other values, SafeInputPath rules apply. The original relative path is returned unchanged (not resolved to absolute) so upload helpers can re-validate at the actual I/O point via SafeUploadPath.

func SafeOutputPath 

func SafeOutputPath(path string) (string, error)

SafeOutputPath validates a download/export target path for --output flags. It rejects absolute paths, resolves symlinks to their real location, and verifies the canonical result is still under the current working directory. This prevents an AI Agent from being tricked into writing files outside the working directory (e.g. "../../.ssh/authorized_keys") or following symlinks to sensitive locations.

The returned absolute path MUST be used for all subsequent I/O to prevent time-of-check-to-time-of-use (TOCTOU) race conditions.

func SafePath 

func SafePath(path string) error

SafePath performs basic path validation checking for dangerous patterns. For full security (symlink resolution, CWD containment), use SafeOutputPath or SafeInputPath.

func ServerGuidance added in v1.0.58 

func ServerGuidance(diag ServerDiagnostics) (string, string)

ServerGuidance exposes the same recovery projection to repository-local adapters so legacy JSON and unified-result errors stay semantically aligned.

func SetHostControlProvider added in v1.0.18 

func SetHostControlProvider(fn func() string)

SetHostControlProvider wires up the classifier's hostControl injection. It MUST be called once during CLI bootstrap (e.g. from internal/app init()) so that the first cleanPATJSON call observes a valid provider. Passing nil disables injection (useful for isolated tests).

func SetPATOpenBrowserProvider added in v1.0.18 

func SetPATOpenBrowserProvider(fn func() bool)

SetPATOpenBrowserProvider wires the PAT JSON serializer to the current browser policy. Passing nil restores the open-source fallback (true).

func StripQueryFragment 

func StripQueryFragment(path string) string

StripQueryFragment removes any ?query or #fragment suffix from a URL path. API parameters must go through structured --params flags, not embedded in the path, to prevent parameter injection and behaviour confusion.

Types

type Category 

type Category string

Category represents a stable error class with a documented exit code. 

const (
	CategoryAPI        Category = "api"
	CategoryAuth       Category = "auth"
	CategoryValidation Category = "validation"
	CategoryDiscovery  Category = "discovery"
	CategoryInternal   Category = "internal"

	// CategoryPartial is retained for source compatibility, but an error cannot
	// reconstruct the per-item data required by a partial result. It therefore
	// fails closed as internal; callers must use output.Partial for exit code 7.
	CategoryPartial Category = "partial_failure"
)

type Error 

type Error struct {
	Category          Category
	Message           string
	Operation         string
	ServerKey         string
	Origin            string
	FailureStage      string
	ExecutionStarted  *bool
	Retryable         bool
	RetryableSet      bool
	RetryAfterSeconds *int64
	NextRetryAt       *time.Time
	Reason            string
	Hint              string
	Actions           []string
	AvailableFlags    []string
	Snapshot          string
	Details           map[string]any
	RPCCode           int               `json:"rpc_code,omitempty"`
	RPCData           json.RawMessage   `json:"rpc_data,omitempty"`
	ServerDiag        ServerDiagnostics `json:"-"`
	Cause             error             `json:"-"`
}

Error is the structured repository-local error model for the Go rewrite.

func (*Error) Error 

func (e *Error) Error() string

func (*Error) ExitCode 

func (e *Error) ExitCode() int

ExitCode returns the documented process exit code for the error category. exit=4 is reserved exclusively for PATError (see internal/errors/pat.go ExitCodePermission and the exit-code table in docs/reference.md); Discovery therefore uses 6 so hosts can tell "catalog lookup broke" apart from "PAT permission insufficient".

confirmation_required 是 validation 的子类而非独立类别（B171，AC-13， 规划 v1.2 OQ-1 定案）：门禁拦截错误挂 CategoryValidation 并以 reason=confirmation_required 区分，与 validation 共享 rc=3。信封侧 internal/output exitCodeForErrorInfo 的「subtype 优先于 type、 confirmation_required 恒 3」规则与本表同源（轮10裁决⑬；远期独立码 保留于规划 OQ-9，落地前不得双轨）。

func (*Error) Unwrap 

func (e *Error) Unwrap() error

Unwrap returns the underlying cause, enabling errors.Is and errors.As chains.

type ExitCoder added in v1.0.9 

type ExitCoder interface {
	ExitCode() int
}

ExitCoder is implemented by errors that provide their own exit code. Edition-specific error types (e.g. PATError, CLIError) implement this so the framework can resolve exit codes without importing edition packages.

type Option 

type Option func(*Error)

Option mutates a structured error before it is returned.

func WithActions 

func WithActions(actions ...string) Option

WithActions records suggested next actions for recovery.

func WithAvailableFlags added in v1.0.27 

func WithAvailableFlags(names ...string) Option

WithAvailableFlags records visible local flag names for agent recovery.

func WithCause 

func WithCause(err error) Option

WithCause wraps the original error so it can be retrieved via errors.Unwrap.

func WithDetails added in v1.0.57 

func WithDetails(details map[string]any) Option

WithDetails records an additive machine-readable payload for errors whose recovery needs typed context, such as ambiguous target-resolution candidates. Callers must keep credentials and other secrets out of details.

func WithExecutionStarted added in v1.0.57 

func WithExecutionStarted(started bool) Option

WithExecutionStarted records whether the downstream business operation was known to have started. Unknown state must be represented by omitting this option, which is important for safe retry decisions on write operations.

func WithFailureStage added in v1.0.57 

func WithFailureStage(stage string) Option

WithFailureStage records the execution stage at which the failure occurred.

func WithHint 

func WithHint(hint string) Option

WithHint records a short recovery hint for humans and agents.

func WithNextRetryAt added in v1.0.56 

func WithNextRetryAt(next time.Time) Option

WithNextRetryAt records the absolute time at which a retry may be attempted.

func WithOperation 

func WithOperation(operation string) Option

WithOperation records the operation that failed.

func WithOrigin added in v1.0.57 

func WithOrigin(origin string) Option

WithOrigin records the component that produced the failure, such as the client, MCP gateway, or DingTalk API. It is independent from Category, which remains the stable exit-code contract.

func WithRPCCode 

func WithRPCCode(code int) Option

WithRPCCode records the original JSON-RPC error code.

func WithRPCData 

func WithRPCData(data json.RawMessage) Option

WithRPCData records the original JSON-RPC error data payload.

func WithReason 

func WithReason(reason string) Option

WithReason records a stable machine-readable failure reason.

func WithRetryAfterSeconds added in v1.0.56 

func WithRetryAfterSeconds(seconds int64) Option

WithRetryAfterSeconds records the server-recommended delay before a retry. A zero delay is meaningful and is therefore preserved; negative values are ignored as invalid server guidance.

本通道只存原值、不钳制（B195/B199，AC-24）：服务端给多少存多少，wire 上 retry_after_seconds 原样透传。transport 侧的 RetryMaxDelay 钳制只作用于 重试延迟选择（retryDelayForAttempt），不得回写或截断本字段（B196 草案： 钳制上限可配置化后仍须保持「钳制延迟、不钳制透传」双通道分离）。

func WithRetryable 

func WithRetryable(retryable bool) Option

WithRetryable marks whether the error can be retried safely.

func WithServerDiag added in v1.0.5 

func WithServerDiag(diag ServerDiagnostics) Option

WithServerDiag attaches server diagnostics to the error.

func WithServerKey 

func WithServerKey(serverKey string) Option

WithServerKey records the server identifier associated with the failure.

func WithSnapshot 

func WithSnapshot(path string) Option

WithSnapshot records the recovery snapshot path associated with the failure.

func WithTraceID added in v1.0.5 

func WithTraceID(id string) Option

WithTraceID records the server-provided trace identifier. Used when only the trace ID is available (e.g. from HTTP headers) without a full ServerDiagnostics struct.

type PATError added in v1.0.11 

type PATError struct {
	RawJSON string
}

PATError represents a PAT (Personal Action Token) authorization failure that should be passed through to stderr as raw JSON without any CLI-layer wrapping. The host application parses the JSON to display its own authorization UI. The wire schema is fixed: a single-line, directly json.Unmarshal-able payload of the form {"success":false,"code":<frozen enum>,"data":{...}}.

When the payload includes data.uri/authUrl/authorizationUrl, that value is the authoritative server-provided authorization link. The CLI accepts all legacy aliases, normalizes the known DingTalk hash-route variant, and emits a single data.uri field so terminals and hosts do not need to deduplicate links.

func AsPatAuthCheckError added in v1.0.11 

func AsPatAuthCheckError(err error) *PATError

AsPatAuthCheckError extracts a *PATError from an error chain.

func ClassifyPatAuthCheck added in v1.0.11 

func ClassifyPatAuthCheck(content map[string]any) *PATError

ClassifyPatAuthCheck is the open-source fallback that checks a tool-call Content map for PAT permission codes and auth-required codes. Returns a non-nil *PATError when the content carries a recognised PAT/auth error.

func (*PATError) Error added in v1.0.11 

func (e *PATError) Error() string

func (*PATError) ExitCode added in v1.0.11 

func (e *PATError) ExitCode() int

ExitCode returns the documented exit code for PAT permission errors (4).

func (*PATError) RawStderr added in v1.0.11 

func (e *PATError) RawStderr() string

RawStderr returns the raw JSON to be written directly to stderr.

type RawStderrError added in v1.0.9 

type RawStderrError interface {
	error
	RawStderr() string
}

RawStderrError is implemented by errors that must output raw content directly to stderr, bypassing all CLI formatting (e.g. "Error:" prefix). PAT authorization errors use this to pass JSON through to the desktop runtime.

type ServerDiagnostics added in v1.0.5 

type ServerDiagnostics struct {
	TraceID         string `json:"trace_id,omitempty"`
	ServerErrorCode string `json:"server_error_code,omitempty"`
	TechnicalDetail string `json:"technical_detail,omitempty"`
	FriendlyHint    string `json:"friendly_hint,omitempty"`
	ActionURL       string `json:"action_url,omitempty"`
	ServerRetryable *bool  `json:"server_retryable,omitempty"`
}

ServerDiagnostics holds server-side diagnostic fields extracted from MCP response bodies or HTTP response headers. Fields are populated on a best-effort basis during error construction.

func (ServerDiagnostics) IsEmpty added in v1.0.5 

func (d ServerDiagnostics) IsEmpty() bool

IsEmpty returns true when no diagnostic field has been populated.

type Verbosity added in v1.0.5 

type Verbosity int

Verbosity controls how much detail PrintHuman includes. 

const (
	// VerbosityNormal shows essential info: error, hint, actions, trace_id, server_code.
	VerbosityNormal Verbosity = 0
	// VerbosityVerbose adds technical_detail, snapshot, execution context.
	VerbosityVerbose Verbosity = 1
	// VerbosityDebug adds all internal diagnostics (category, operation, reason, rpc_code).
	VerbosityDebug Verbosity = 2
)

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