Aleksey Shakhmatov
5cfd1a7400
- Deduplicate sentinel errors: httpx.ErrNoHealthy, ErrCircuitOpen, and ErrRetryExhausted are now aliases to the canonical sub-package values so errors.Is works across package boundaries - Retry transport returns ErrRetryExhausted only when all attempts are actually exhausted, not on early policy exit - Balancer: pre-parse endpoint URLs at construction, replace req.Clone with cheap shallow struct copy to avoid per-request allocations - Circuit breaker: Load before LoadOrStore to avoid allocating a Breaker on every request for known hosts - Health checker: drain response body before close for connection reuse, probe endpoints concurrently, run initial probe synchronously in Start - Client: add Close() to shut down health checker goroutine, propagate URL resolution errors instead of silently discarding them - MockClock: fix lock ordering in Reset (clock.mu before t.mu), fix timer slice compaction to avoid backing-array aliasing, extract fireExpired to deduplicate Advance/Set
50 lines
1.5 KiB
Go
50 lines
1.5 KiB
Go
package httpx
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import (
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"fmt"
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"net/http"
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"git.codelab.vc/pkg/httpx/balancer"
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"git.codelab.vc/pkg/httpx/circuitbreaker"
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"git.codelab.vc/pkg/httpx/retry"
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)
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// Sentinel errors returned by httpx components.
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// These are aliases for the canonical errors defined in sub-packages,
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// so that errors.Is works regardless of which import the caller uses.
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var (
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ErrRetryExhausted = retry.ErrRetryExhausted
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ErrCircuitOpen = circuitbreaker.ErrCircuitOpen
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ErrNoHealthy = balancer.ErrNoHealthy
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)
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// Error provides structured error information for failed HTTP operations.
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type Error struct {
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// Op is the operation that failed (e.g. "Get", "Do").
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Op string
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// URL is the originally-requested URL.
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URL string
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// Endpoint is the resolved endpoint URL (after balancing).
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Endpoint string
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// StatusCode is the HTTP status code, if a response was received.
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StatusCode int
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// Retries is the number of retry attempts made.
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Retries int
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// Err is the underlying error.
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Err error
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}
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func (e *Error) Error() string {
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if e.Endpoint != "" && e.Endpoint != e.URL {
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return fmt.Sprintf("httpx: %s %s (endpoint %s): %v", e.Op, e.URL, e.Endpoint, e.Err)
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}
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return fmt.Sprintf("httpx: %s %s: %v", e.Op, e.URL, e.Err)
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}
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func (e *Error) Unwrap() error { return e.Err }
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// ErrorMapper maps an HTTP response to an error. If the response is
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// acceptable, the mapper should return nil. Used by Client to convert
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// non-successful HTTP responses into Go errors.
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type ErrorMapper func(resp *http.Response) error
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