fish2018/pansou · error

创建详情页请求失败

Error message

创建详情页请求失败: %w

What it means

In WujiPlugin.fetchMagnetLink the plugin builds a GET request for the detail page with http.NewRequestWithContext under a TimeoutSeconds timeout. This error wraps any failure of http.NewRequestWithContext itself — it fires before any network I/O happens. Typical causes are a malformed/unparseable detailURL, an unsupported URL scheme, or a nil/invalid context.

Solutions

1. Log the detailURL value when this error occurs and inspect it for emptiness, spaces, or missing scheme.
2. Resolve scraped hrefs against the site base before calling fetchMagnetLink, e.g. resp.Request.URL.Parse(href) or url.Parse + ResolveReference.
3. Validate the URL with url.ParseRequestURI(detailURL) and skip results with invalid links instead of letting the error propagate.
4. Skip enrichment for a result whose Links slice is empty (enrichWithMagnetLinks already checks len(Links)==0; make sure the link value itself is non-empty too).

Example fix

// before
magnet, err := p.fetchMagnetLink(client, link.Href)
// after
u, perr := url.Parse(strings.TrimSpace(link.Href))
if perr != nil || u.Scheme == "" {
    continue // skip invalid detail URL
}
magnet, err := p.fetchMagnetLink(client, base.ResolveReference(u).String())

u, err := url.ParseRequestURI(strings.TrimSpace(detailURL))
if err != nil || (u.Scheme != "http" && u.Scheme != "https") {
    // skip this result; don't call fetchMagnetLink
}

magnet, err := p.fetchMagnetLink(client, detailURL)
if err != nil {
    log.Printf("magnet fetch failed for %s: %v", detailURL, err)
    return ""
}

When it happens

Trigger: fetchMagnetLink is called with a detailURL that http.NewRequestWithContext cannot parse: empty string, missing scheme, invalid characters, control characters in the URL, or a non-http(s) scheme. Also fires if the timeout context is already invalid.

Common situations: Scraped hrefs from search results that are empty or relative and never resolved against the site base URL; detail URLs containing spaces or unencoded Chinese characters taken straight from HTML attributes; site layout change producing href="" for every result.

Understand the failure class

Background: "Invalid URL" errors: why new URL(), URI.parse, and reqwest::Url reject your string — missing scheme, whitespace, and bad path format — this error's family across 39 libraries.

Related errors

• 重试 次后仍然失败
• [ ] 搜索第一页失败
• [ ] 搜索请求返回状态码
• status
• [ ] 创建请求失败

AI-assisted analysis of fish2018/pansou@beaa561337 (2026-09-07). Data as JSON: /api/errors/672bb229a13c2d82. Report an issue: GitHub.

Appendix: source

Thrown at plugin/wuji/wuji.go:308

	// 检查缓存
	if cached, ok := magnetCache.Load(detailURL); ok {
		if entry, ok := cached.(magnetCacheEntry); ok {
			if time.Since(entry.Timestamp) < cacheTTL {
				// 缓存命中
				return entry.MagnetLink, nil
			}
			// 缓存过期，删除
			magnetCache.Delete(detailURL)
		}
	}
	// 创建带超时的上下文
	ctx, cancel := context.WithTimeout(context.Background(), TimeoutSeconds*time.Second)
	defer cancel()
	
	// 创建请求
	req, err := http.NewRequestWithContext(ctx, "GET", detailURL, nil)
	if err != nil {
		return "", fmt.Errorf("创建详情页请求失败: %w", err)
	}
	
	// 设置请求头
	p.setRequestHeaders(req)
	
	// 发送HTTP请求
	resp, err := p.doRequestWithRetry(req, client)
	if err != nil {
		return "", fmt.Errorf("详情页请求失败: %w", err)
	}
	defer resp.Body.Close()
	
	// 检查状态码
	if resp.StatusCode != 200 {
		return "", fmt.Errorf("详情页返回状态码: %d", resp.StatusCode)
	}
	
	// 读取响应体内容

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