chenhg5/cc-connect · error

weixin: %s: new request: %w

Error message

weixin: %s: new request: %w

What it means

post() fails while constructing the outbound HTTP request with http.NewRequestWithContext, before any network I/O. Given that bodies are plain byte slices and endpoints are simple strings, this almost always indicates a malformed URL — e.g. an empty or invalid baseURL joined with the endpoint.

Source

Thrown at platform/weixin/client.go:83

		Timeout:   timeout + 5*time.Second,
		Transport: tr,
	}
}

func randomWechatUIN() string {
	var b [4]byte
	if _, err := rand.Read(b[:]); err != nil {
		return base64.StdEncoding.EncodeToString([]byte("0000"))
	}
	u := uint32(b[0])<<24 | uint32(b[1])<<16 | uint32(b[2])<<8 | uint32(b[3])
	return base64.StdEncoding.EncodeToString([]byte(fmt.Sprintf("%d", u)))
}

func (c *apiClient) post(ctx context.Context, endpoint string, body []byte, timeout time.Duration, label string) ([]byte, error) {
	url := c.baseURL + strings.TrimPrefix(endpoint, "/")
	req, err := http.NewRequestWithContext(ctx, http.MethodPost, url, bytes.NewReader(body))
	if err != nil {
		return nil, fmt.Errorf("weixin: %s: new request: %w", label, err)
	}
	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("AuthorizationType", "ilink_bot_token")
	req.Header.Set("Content-Length", fmt.Sprintf("%d", len(body)))
	req.Header.Set("X-WECHAT-UIN", randomWechatUIN())
	if c.token != "" {
		req.Header.Set("Authorization", "Bearer "+c.token)
	}
	if c.routeTag != "" {
		req.Header.Set("SKRouteTag", c.routeTag)
	}

	client := c.httpClient
	if timeout > 0 {
		// Dedicated client so long-poll does not inherit short Timeout from default client.
		client = c.longPollClient(timeout)
	}

View on GitHub (pinned to 4000b2338a)

Solutions

1. Check the base_url setting for the weixin platform in config.toml — it must include the scheme (default https://ilinkai.weixin.qq.com)
2. Print/verify the constructed URL (baseURL+endpoint) when this fires
3. Ensure endpoint strings have no stray whitespace or invalid characters
4. Confirm the label in the error to identify which API call (getUpdates/sendMessage/etc.) built the bad request

Example fix

# before: config.toml
[platforms.weixin]
base_url = "ilinkai.weixin.qq.com"   # missing scheme
# after
[platforms.weixin]
base_url = "https://ilinkai.weixin.qq.com"

u := baseURL
if parsed, err := url.Parse(u); err != nil || parsed.Scheme == "" || parsed.Host == "" {
    return fmt.Errorf("invalid weixin base_url %q", u)
}

When it happens

Trigger: http.NewRequestWithContext returns an error for the URL c.baseURL+endpoint — typically an unparseable/empty base URL or a context already cancelled with an invalid method/URL combination.

Common situations: baseURL misconfigured in config.toml (e.g. missing scheme like 'ilinkai.weixin.qq.com' without https://); whitespace/control characters injected into the URL; empty endpoint constant typo.

Understand the failure class

Background: "Invalid URL" / "URL cannot be empty": fix the malformed or missing URL behind request-construction failures — this error's family across 50 libraries.

Related errors

• build request: %w
• reasonix: create request: %w
• http %d: %s
• get_bot_qrcode: %w
• get_qrcode_status http %d: %s

AI-assisted analysis of chenhg5/cc-connect@4000b2338a (2026-09-06). Data as JSON: /api/errors/87cfb43e149c8c5b. Report an issue: GitHub.