fish2018/pansou · error

创建请求失败

Error message

创建请求失败: %w

What it means

hdr4k's doSearch wraps errors from http.NewRequest as 创建请求失败. Building a POST request to the 4KHDR search endpoint failed — with a strings.NewReader body this essentially only happens if SearchURL is not a parseable absolute URL.

Solutions

  1. Print SearchURL and fix any malformed characters or missing scheme
  2. Validate with url.Parse(SearchURL) at plugin init so misconfiguration fails fast
  3. URL-encode any dynamic parts of the URL instead of concatenating raw text
  4. Restore the correct constant if it was accidentally changed

Example fix

// before
req, err := http.NewRequest("POST", SearchURL, strings.NewReader(data.Encode()))
if err != nil {
    return nil, fmt.Errorf("创建请求失败: %w", err)
}
// after
if _, err := url.Parse(SearchURL); err != nil {
    return nil, fmt.Errorf("配置的 SearchURL 无效 %q: %w", SearchURL, err)
}
req, err := http.NewRequest("POST", SearchURL, strings.NewReader(data.Encode()))
if err != nil {
    return nil, fmt.Errorf("创建请求失败: %w", err)
}
Defensive patterns

Strategy: validation

Validate before calling

// Go: fail fast on a misconfigured SearchURL
if SearchURL == "" {
    return nil, fmt.Errorf("SearchURL is not configured")
}
if _, err := url.Parse(SearchURL); err != nil {
    return nil, fmt.Errorf("SearchURL invalid: %w", err)
}

Try / catch

req, err := http.NewRequest("POST", SearchURL, strings.NewReader(data.Encode()))
if err != nil {
    return nil, fmt.Errorf("创建请求失败: %w (SearchURL=%q)", err, SearchURL)
}

Prevention

When it happens

Trigger: http.NewRequest("POST", SearchURL, ...) errors because SearchURL is empty, malformed, or contains invalid characters (spaces, unencoded CJK) — e.g. a misconfigured or corrupted constant.

Common situations: BaseURL/SearchURL constant edited incorrectly; config value with whitespace or wrong scheme; build-time templating producing an empty URL.

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

AI-assisted analysis of fish2018/pansou@beaa561337 (2026-09-07). Data as JSON: /api/errors/e3a06a13c15fbff3. Report an issue: GitHub.

Appendix: source

Thrown at plugin/hdr4k/hdr4k.go:143

	// 处理ext参数
	searchKeyword := keyword
	if ext != nil {
		// 使用类型断言安全地获取参数
		if titleEn, ok := ext["title_en"].(string); ok && titleEn != "" {
			// 使用英文标题替换关键词
			searchKeyword = titleEn
		}
	}
	
	// 构建POST请求数据
	data := url.Values{}
	data.Set("srchtxt", searchKeyword)
	data.Set("searchsubmit", "yes")
	
	// 发送POST请求
	req, err := http.NewRequest("POST", SearchURL, strings.NewReader(data.Encode()))
	if err != nil {
		return nil, fmt.Errorf("创建请求失败: %w", err)
	}
	
	// 设置请求头
	req.Header.Set("User-Agent", getRandomUA())
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	req.Header.Set("Referer", "https://www.4khdr.cn/")
	
	// 发送请求（带重试）
	resp, err := p.doRequestWithRetry(client, req, MaxRetries)
	if err != nil {
		return nil, fmt.Errorf("请求失败: %w", err)
	}
	defer resp.Body.Close()
	
	// 解析HTML
	doc, err := goquery.NewDocumentFromReader(resp.Body)
	if err != nil {
		return nil, fmt.Errorf("解析HTML失败: %w", err)

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