da36506b89
P0 fixes: - ModelError.Is(): use exact matching instead of substring contains() - shouldClearStickySession: add context param for cancellation/tracing P1 fixes: - TODO stubs: return 501 Not Implemented errors - validateInstanceSignature: deduplicate to shared validateCodeSignature() - Error messages: standardize to English only - http.go: remove pseudo if-else with duplicate branches
39 lines
958 B
Go
39 lines
958 B
Go
package service
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import (
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"errors"
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"fmt"
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"io"
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"github.com/Wei-Shaw/sub2api/internal/config"
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)
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var ErrUpstreamResponseBodyTooLarge = errors.New("upstream response body too large")
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const defaultUpstreamResponseReadMaxBytes int64 = 8 * 1024 * 1024
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func resolveUpstreamResponseReadLimit(cfg *config.Config) int64 {
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if cfg != nil && cfg.Gateway.UpstreamResponseReadMaxBytes > 0 {
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return cfg.Gateway.UpstreamResponseReadMaxBytes
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}
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return defaultUpstreamResponseReadMaxBytes
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}
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func readUpstreamResponseBodyLimited(reader io.Reader, maxBytes int64) ([]byte, error) {
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if reader == nil {
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return nil, errors.New("response body is nil")
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}
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if maxBytes <= 0 {
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maxBytes = defaultUpstreamResponseReadMaxBytes
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}
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body, err := io.ReadAll(io.LimitReader(reader, maxBytes+1))
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if err != nil {
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return nil, err
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}
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if int64(len(body)) > maxBytes {
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return nil, fmt.Errorf("%w: limit=%d", ErrUpstreamResponseBodyTooLarge, maxBytes)
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}
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return body, nil
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}
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