fish2018/pansou · error

搜索请求失败

Error message

搜索请求失败: %w

What it means

xb6v's searchImpl POSTs the search form through p.doRequest using a no-redirect client (CheckRedirect returns http.ErrUseLastResponse) and wraps any transport failure as this error. It fires when the POST itself fails — DNS, connect, TLS, or timeout — before any response is available.

Solutions

  1. Unwrap the error and check for DNS errors (e.g. 'no such host') — if present, the site domain changed and currentBase must be updated (run the plugin's base-discovery/fallback logic if available).
  2. Verify network egress/DNS from the runtime environment (curl the search URL).
  3. Confirm the search URL is built correctly (log searchURL) and includes no stale protocol/host.
  4. Increase timeouts / enable retries in doRequest if the site is slow.
  5. Configure proxy support if the site is blocked from your region.

Example fix

// before
resp, err := p.doRequest(noRedirectClient, "POST", searchURL, postData, p.currentBase)
if err != nil {
    return nil, fmt.Errorf("搜索请求失败: %w", err)
}
// after
resp, err := p.doRequest(noRedirectClient, "POST", searchURL, postData, p.currentBase)
if err != nil {
    if strings.Contains(err.Error(), "no such host") {
        if rerr := p.refreshBaseURL(); rerr == nil {
            return p.searchImpl(keyword)
        }
    }
    return nil, fmt.Errorf("搜索请求失败: %w", err)
}
Defensive patterns

Strategy: try-catch

Validate before calling

// verify the configured base is reachable before searching
resp, err := http.Get(p.currentBase)
if err != nil { /* refresh base URL or report site down */ }

Try / catch

results, err := p.search(keyword)
if err != nil && strings.Contains(err.Error(), "搜索请求失败") {
    if strings.Contains(err.Error(), "no such host") {
        // domain likely changed; attempt base-url refresh
    }
    return nil, err
}

Prevention

When it happens

Trigger: p.doRequest(noRedirectClient, "POST", searchURL, postData, p.currentBase) returns an error: searchURL (currentBase + SearchPath) unreachable, domain changed, TLS failure, connection refused, or request timeout. Note it is not triggered by non-2xx responses — those are returned normally.

Common situations: The xb6v site changing its domain (p.currentBase stale) so the host no longer resolves; the site blocking the plugin's requests entirely; no network egress from the deployment environment; timeouts on a slow/overloaded site.

Understand the failure class

Background: 'Something went wrong' / 'Request failed (500)' / 'HTTP error! status: 404' — what failed HTTP requests actually mean and how to find the real cause — this error's family across 28 libraries.

Related errors

AI-assisted analysis of fish2018/pansou@beaa561337 (2026-09-07). Data as JSON: /api/errors/7193021536e97ae3. Report an issue: GitHub.

Appendix: source

Thrown at plugin/xb6v/xb6v.go:182

	if p.debugMode {
		log.Printf("[Xb6v] 开始搜索: %s (原始: %s)", keyword, originalKeyword)
	}

	// 第一步：POST搜索请求
	searchURL := p.currentBase + SearchPath
	postData := fmt.Sprintf("show=title&tempid=1&tbname=article&mid=1&dopost=search&submit=&keyboard=%s", url.QueryEscape(keyword))

	// 创建不自动重定向的客户端
	noRedirectClient := &http.Client{
		CheckRedirect: func(req *http.Request, via []*http.Request) error {
			return http.ErrUseLastResponse
		},
	}

	resp, err := p.doRequest(noRedirectClient, "POST", searchURL, postData, p.currentBase)
	if err != nil {
		return nil, fmt.Errorf("搜索请求失败: %w", err)
	}
	defer resp.Body.Close()

	if p.debugMode {
		log.Printf("[Xb6v] POST响应状态码: %d", resp.StatusCode)
	}

	// 获取重定向的location
	location := resp.Header.Get("Location")
	if p.debugMode {
		log.Printf("[Xb6v] Location头: '%s'", location)
	}

	// 如果没有Location头，可能需要从响应体中解析
	if location == "" {
		if p.debugMode {
			log.Printf("[Xb6v] 未找到Location头，尝试解析响应体")
		}

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