juicedata/juicefs · error

get proxy url for endpoint: %s error: %q

Error message

get proxy url for endpoint: %s error: %q

What it means

newOBS honors HTTP_PROXY/HTTPS_PROXY/NO_PROXY by resolving a proxy for the endpoint via httpproxy.FromEnvironment(). If the proxy function errors (e.g. proxy URL in env is unparseable or the scheme/host is unsupported for proxying), construction aborts with 'get proxy url for endpoint: <endpoint> error: <cause>'.

Source

Thrown at pkg/object/obs.go:421

	var region string
	if len(hostParts) == 1 {
		if endpoint, err = autoOBSEndpoint(bucketName, accessKey, secretKey, token); err != nil {
			return nil, fmt.Errorf("cannot get location of bucket %s: %q", bucketName, err)
		}
		if !strings.HasPrefix(endpoint, "http") {
			endpoint = fmt.Sprintf("%s://%s", uri.Scheme, endpoint)
		}
	} else {
		region = strings.Split(hostParts[1], ".")[1]
	}

	// Use proxy setting from environment variables: HTTP_PROXY, HTTPS_PROXY, NO_PROXY
	if uri, err = url.ParseRequestURI(endpoint); err != nil {
		return nil, fmt.Errorf("invalid endpoint %s: %q", endpoint, err)
	}
	proxyURL, err := httpproxy.FromEnvironment().ProxyFunc()(uri)
	if err != nil {
		return nil, fmt.Errorf("get proxy url for endpoint: %s error: %q", endpoint, err)
	}
	var urlString string
	if proxyURL != nil {
		urlString = proxyURL.String()
	}

	// Empty proxy url string has no effect
	// there is a bug in the retry of PUT (did not call Seek(0,0) before retry), so disable the retry here
	c, err := obs.New(accessKey, secretKey, endpoint, obs.WithSecurityToken(token),
		obs.WithProxyUrl(urlString), obs.WithMaxRetryCount(0), obs.WithUserAgent(UserAgent),
		obs.WithHttpTransport(httpClient.Transport.(*http.Transport)))
	if err != nil {
		return nil, fmt.Errorf("fail to initialize OBS: %q", err)
	}
	var checkEtag bool
	if _, err = c.GetBucketEncryption(bucketName); err != nil {
		if obsError, ok := err.(obs.ObsError); ok && obsError.Code == "NoSuchEncryptionConfiguration" {
			checkEtag = true

View on GitHub (pinned to c9a67b23e8)

Solutions

1. Check HTTP_PROXY/HTTPS_PROXY/NO_PROXY values for validity (full http:// scheme, valid URL)
2. Unset the proxy vars and retry to confirm the proxy config is the cause
3. Correct the proxy URL format (e.g. http://proxy.corp.example:3128)
4. Fix invalid NO_PROXY entries (domains/CIDRs)

Example fix

// before
export HTTPS_PROXY=proxy.corp.example:3128
// after
export HTTPS_PROXY=http://proxy.corp.example:3128

for _, v := range []string{"HTTP_PROXY","HTTPS_PROXY","NO_PROXY"} {
	if p := os.Getenv(v); p != "" {
		if _, err := url.Parse(p); err != nil { return fmt.Errorf("bad %s: %w", v, err) }
	}
}

if err != nil && strings.Contains(err.Error(), "get proxy url") {
	// unset or fix proxy env vars and retry
}

When it happens

Trigger: HTTP_PROXY/HTTPS_PROXY/NO_PROXY environment variables set to malformed URLs (e.g. missing scheme like 'proxy.corp:3128' handled poorly, or invalid percent-escapes) while creating OBS storage.

Common situations: Corporate proxy misconfigured in env; typos in NO_PROXY CIDR notation; proxy URL with unsupported scheme (socks variants not accepted by httpproxy ProxyFunc for http transport).

Understand the failure class

Background: "is not a valid" / "Invalid ... value" environment variable errors: how libraries validate env vars and what to do when they reject yours — this error's family across 48 libraries.

Related errors

• are you connected to the network?
• error GET request: %v
• Failed to create bucket %s: %s, previous error: %s
• failed to convert %s to %s: %w
• (cancelled) upload block %s: %s (after %d tries)

AI-assisted analysis of juicedata/juicefs@c9a67b23e8 (2026-09-06). Data as JSON: /api/errors/7cba1678755ef29c. Report an issue: GitHub.