{"record":{"id":"8c239e33d2e8de4e","repo":"karatelabs/karate","slug":"failed-to-fetch-content-from-url-url","errorCode":null,"errorMessage":"Failed to fetch content from URL: {url}","messagePattern":"Failed to fetch content from URL: (.+?)","errorType":"exception","errorClass":"RuntimeException","httpStatus":null,"severity":"error","filePath":"karate-js/src/main/java/io/karatelabs/common/Resource.java","lineNumber":854,"sourceCode":"\n    /**\n     * Creates a Resource from a URL with custom root.\n     * Supports file://, jar://, http://, and https:// schemes.\n     *\n     * @param url  the URL to convert\n     * @param root the root path for relative path computation\n     * @return Resource instance (PathResource for file/jar, UrlResource for http/https)\n     */\n    static Resource from(URL url, Path root) {\n        String protocol = url.getProtocol();\n\n        // Handle HTTP/HTTPS URLs by streaming content into UrlResource\n        if (\"http\".equals(protocol) || \"https\".equals(protocol)) {\n            try (java.io.InputStream is = url.openStream()) {\n                byte[] bytes = FileUtils.toBytes(is);\n                return root != null ? new UrlResource(url, bytes, root) : new UrlResource(url, bytes);\n            } catch (Exception e) {\n                throw new RuntimeException(\"Failed to fetch content from URL: \" + url, e);\n            }\n        }\n\n        // Handle file:// and jar:// URLs\n        try {\n            Path path = urlToPath(url, root);\n            return root != null ? new PathResource(path, root) : new PathResource(path);\n        } catch (java.nio.file.ProviderNotFoundException e) {\n            // JAR file system provider not available (common in jpackage/JavaFX apps)\n            // Fall back to streaming the resource content\n            try (java.io.InputStream is = url.openStream()) {\n                String content = FileUtils.toString(is);\n                return root != null ? new MemoryResource(content, root) : new MemoryResource(content);\n            } catch (Exception ex) {\n                throw new RuntimeException(\"Failed to create resource from URL: \" + url, ex);\n            }\n        } catch (Exception e) {\n            throw new RuntimeException(\"Failed to create resource from URL: \" + url, e);","sourceCodeStart":836,"sourceCodeEnd":872,"githubUrl":"https://github.com/karatelabs/karate/blob/a22eb90246d958d15a47bf436693d0121ad2812d/karate-js/src/main/java/io/karatelabs/common/Resource.java#L836-L872","documentation":"Thrown when Resource resolves an http/https URL: it opens the URL stream and buffers the bytes, and any failure in that network fetch (connect error, 4xx/5xx via IOException, TLS failure, timeout) is wrapped as 'Failed to fetch content from URL: {url}'.","triggerScenarios":"Calling the URL-based resource factory with an http/https URL whose openStream() or byte read throws — server down, wrong host/port, DNS failure, TLS handshake failure, or a 404 that surfaces as a FileNotFoundException from openStream.","commonSituations":"Referencing remote feature/data files by URL in CI where the network is restricted; typos in hostnames; server returning errors; corporate proxies requiring configuration (-Dhttp.proxyHost etc.).","solutions":["Open the URL in a browser or 'curl -I <url>' to confirm it is reachable and returns 200","Check DNS/proxy settings and add JVM proxy flags if behind a corporate proxy (-Dhttps.proxyHost, -Dhttps.proxyPort)","Correct the URL (scheme, host, port, path) and retry","Prefer downloading the resource to a local file once, then use a file/classpath resource, for hermetic test runs"],"exampleFix":"// before\nResource r = Resource.fromUrl(new URL(\"http://configs.example.com/karate-base.js\"));\n// after\nHttpURLConnection c = (HttpURLConnection) new URL(url).openConnection();\nc.setConnectTimeout(5000);\nif (c.getResponseCode() != 200) {\n    throw new IllegalStateException(\"resource unavailable, HTTP \" + c.getResponseCode());\n}\nResource r = Resource.fromUrl(new URL(url));","handlingStrategy":"try-catch","validationCode":"URL u = new URL(url);\nif (!\"http\".equals(u.getProtocol()) && !\"https\".equals(u.getProtocol())) {\n    throw new IllegalArgumentException(\"expecting http/https URL: \" + url);\n}\nHttpURLConnection c = (HttpURLConnection) u.openConnection();\nc.setConnectTimeout(5000); c.setReadTimeout(5000);\nif (c.getResponseCode() != 200) throw new IllegalStateException(\"HTTP \" + c.getResponseCode());","typeGuard":null,"tryCatchPattern":"try {\n    Resource r = Resource.fromUrl(new URL(url));\n} catch (RuntimeException e) {\n    if (e.getCause() instanceof java.io.IOException io) {\n        throw new ServiceException(\"remote resource unreachable: \" + url, io);\n    }\n    throw e;\n}","preventionTips":["Favor bundling remote resources locally for reproducible test runs","Set JVM proxy properties in corporate networks","Validate URLs with curl/browser before wiring them into scripts","Use connection/read timeouts on any pre-check so failures surface fast"],"tags":["network","http","url"],"backgroundTag":"http-request-failed","analyzedSha":"a22eb90246d958d15a47bf436693d0121ad2812d","analyzedAt":"2026-09-12T09:01:00.220Z","contentChangedAt":"2026-09-12T09:01:00.220Z","schemaVersion":2},"datasetVersion":"2026-09-16T19:17:19.609Z"}